SYSTEMIX INC /DE
SC 13E3, 1997-01-17
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
 
                                 SCHEDULE 13E-3
                        RULE 13E-3 TRANSACTION STATEMENT
       (PURSUANT TO SECTION 13(E) OF THE SECURITIES EXCHANGE ACT OF 1934)
 
                                 SYSTEMIX, INC.
 
                              (Name of the Issuer)
 
                                 SYSTEMIX, INC.
                         NOVARTIS BIOTECH HOLDING CORP.
                                 NOVARTIS INC.
 
                      (Name of Person(s) Filing Statement)
 
                     COMMON STOCK, PAR VALUE $.01 PER SHARE
 
                         (Title of Class of Securities)
 
                                   371913104
                     (CUSIP Number of Class of Securities)
 
<TABLE>
<S>                                                 <C>
          ROBERT L. THOMPSON, JR., ESQ.                              IRIS BREST, ESQ.
          NOVARTIS BIOTECH HOLDING CORP.                              SYSTEMIX, INC.
                  NOVARTIS INC.                                     3155 PORTER DRIVE
             C/O NOVARTIS CORPORATION                          PALO ALTO, CALIFORNIA 94304
           608 FIFTH AVENUE, 10TH FLOOR                               (415) 813-4119
             NEW YORK, NEW YORK 10020
                  (212) 830-2401
</TABLE>
 
  (Name, Address and Telephone Number of Persons Authorized to Receive Notices
          and Communications on Behalf of Person(s) Filing Statement)
 
                                WITH COPIES TO:
 
<TABLE>
<S>                                                 <C>
             DAVID W. HELENIAK, ESQ.                              MORRIS J. KRAMER, ESQ.
               SHEARMAN & STERLING                       SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
               599 LEXINGTON AVENUE                                  919 THIRD AVENUE
             NEW YORK, NEW YORK 10022                            NEW YORK, NEW YORK 10022
                  (212) 848-4000                                      (212) 735-3000
</TABLE>
 
    This statement is filed in connection with (check the appropriate box):
 
a.    / /      The filing of solicitation materials or an information statement
               subject to Regulation 14A, Regulation 14C or Rule 13e-3(c) under
               the Securities Exchange Act of 1934.
b.    / /      The filing of a registration statement under the Securities Act
               of 1933.
c.    /X/      A tender offer.
d.    / /      None of the above.
 
    Check the following box if the soliciting materials or information statement
referred to in checking box (a) are preliminary copies: [ ]
                           CALCULATION OF FILING FEE
 
<TABLE>
<CAPTION>
         TRANSACTION VALUATION                    AMOUNT OF FILING FEE
<S>                                      <C>
            $90,139,529.40*                           $18,027.90**
</TABLE>
 
*   The total transaction value is based on 14,500,094 Shares outstanding and
    2,003,188 Shares reserved for future issuance pursuant to existing options
    and warrants as of January 10, 1997 less 10,610,099 Shares owned by
    Purchaser, multiplied by the offer price of $19.50 per share and backing out
    the exercise price of the options.
 
**  Calculated as 1/50 of the transaction value.
 
/X/ Check box if any part of the fee is offset by Rule 0-11(a)(2) and identify
   the filing with which the offsetting fee was previously paid. Identify the
   previous filing by registration statement number, or the Form or Schedule and
   the date of its filing.
 
Amount Previously Paid: __$18,027.90____________________________________________
Form of Registration No.: __Schedule 14D-1 (13D (Amendment No. 10))_____________
Filing Party: __Novartis Biotech Holding Corp. and Novartis Inc.________________
Dated Filed: __January 17, 1997_________________________________________________
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                               Page 1 of 11 Pages
                      Exhibit Index is located on Page 11.
<PAGE>
                                  INTRODUCTION
 
    This Rule 13e-3 Transaction Statement on Schedule 13E-3 (the "Schedule
13E-3") is being filed by (i) Novartis Biotech Holding Corp., a Delaware
corporation ("Purchaser") and an indirect wholly-owned subsidiary of Novartis
Inc., a corporation organized under the laws of Switzerland ("Parent"), (ii)
Parent and (iii) SyStemix Inc., a Delaware corporation (the "Company"), pursuant
to Section 13(e) of the Securities Exchange Act of 1934, as amended, and Rule
13e-3 thereunder in connection with the tender offer by Purchaser for all the
outstanding shares of common stock, par value $.01 per share (the "Shares"), of
the Company not already beneficially owned by Purchaser or any of its
affiliates, upon the terms and subject to the conditions set forth in the Offer
to Purchase dated January 17, 1997 (the "Offer to Purchase") and the related
Letter of Transmittal (which together with the Offer to Purchase constitute the
"Offer"), copies of which are filed as Exhibits (d)(1) and (d)(2) hereto,
respectively.
 
    The following Cross Reference Sheet, prepared pursuant to General
Instruction F to Schedule 13E-3, shows the location in the Tender Offer
Statement on Schedule 14D-1 filed by Parent and Purchaser (the "Schedule 14D-1")
with the Securities and Exchange Commission on the date hereof of the
information required to be included in this Schedule 13E-3. The information set
forth in the Schedule 14D-1, including all exhibits thereto, is hereby expressly
incorporated herein by reference as set forth in the Cross Reference Sheet and
the responses in this Schedule 13E-3, and such responses are qualified in their
entirety by reference to the information contained in the Offer to Purchase and
the annexes thereto.
 
    The information contained in this Schedule 13E-3 concerning the Company,
including, without limitation, information concerning the background of the
transaction, the deliberations of the Company's Board of Directors in connection
with the transaction, the opinion of the Company's financial advisor, and the
Company's capital structure and historical financial statements, was supplied by
the Company. Parent and Purchaser take no responsibility for the accuracy of
such information. The information contained in this Schedule 13E-3 concerning
Parent and Purchaser was supplied by Parent and Purchaser. The Company takes no
responsibility for the accuracy of such information.
 
                               Page 2 of 11 Pages
<PAGE>
                             CROSS REFERENCE SHEET
 
<TABLE>
<CAPTION>
ITEM IN                                                                                        WHERE LOCATED IN
SCHEDULE 13E-3                                                                                  SCHEDULE 14D-1
- -------------------------------------------------------------------------------------------  ---------------------
<S>                                                                                          <C>
Item 1(a)..................................................................................  Item 1(a)
Item 1(b)..................................................................................  Item 1(b)
Item 1(c)..................................................................................  Item 1(c)
Item 1(d)..................................................................................            *
Item 1(e)..................................................................................            *
Item 1(f)..................................................................................            *
Item 2(a)..................................................................................  Item 2(a)
Item 2(b)..................................................................................  Item 2(b)
Item 2(c)..................................................................................  Item 2(c)
Item 2(d)..................................................................................  Item 2(d)
Item 2(e)..................................................................................  Item 2(e)
Item 2(f)..................................................................................  Item 2(f)
Item 2(g)..................................................................................  Item 2(g)
Item 3(a)..................................................................................  Item 3(a) and 3(b)
Item 3(b)..................................................................................  Item 3(b)
Item 4.....................................................................................            *
Item 5.....................................................................................  Item 5
Item 6(a)..................................................................................  Item 4(a)
Item 6(b)..................................................................................            *
Item 6(c)..................................................................................  Item 4(b)
Item 6(d)..................................................................................            *
Item 7(a)..................................................................................  Item 5
Item 7(b)..................................................................................            *
Item 7(c)..................................................................................            *
Item 7(d)..................................................................................            *
Item 8.....................................................................................            *
Item 9.....................................................................................            *
Item 10(a).................................................................................  Item 6(a)
Item 10(b).................................................................................            *
Item 11....................................................................................  Item 7
Item 12(a).................................................................................            *
Item 12(b).................................................................................            *
Item 13....................................................................................            *
Item 14....................................................................................            *
Item 15(a).................................................................................            *
Item 15(b).................................................................................  Item 8
Item 16....................................................................................  Item 10(f)
Item 17....................................................................................  Item 11
</TABLE>
 
- ------------------------
 
*   The Item is located in the Schedule 13E-3 only.
 
                               Page 3 of 11 Pages
<PAGE>
ITEM 1. ISSUER AND CLASS OF SECURITY SUBJECT TO THE TRANSACTION.
 
    (a)-(c) The response to Item 1(a)-(c) of the Schedule 14D-1 is incorporated
herein by reference.
 
    (d) The information set forth in the Offer to Purchase under "THE TENDER
OFFER -- Section 6. Price Range of Shares; Dividends" is incorporated herein by
reference.
 
    (e) Not applicable.
 
    (f) The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Background of the Offer and the Merger" and "THE TENDER OFFER --
Section 8. Certain Information Concerning Purchaser and Parent" is incorporated
herein by reference.
 
ITEM 2. IDENTITY AND BACKGROUND.
 
    (a)-(d) This Statement is being filed by Purchaser, Parent and the Company.
The response to Item 2 of the Schedule 14D-1 is incorporated herein by
reference.
 
    (e)-(f) The response to Item 2 of the Schedule 14D-1 is incorporated herein
by reference with respect to Parent and Purchaser. During the last five years,
neither the Company nor, to the best knowledge of the Company, Parent or
Purchaser or any director or executive officer of the Company (i) has been
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors) or (ii) was party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining further
violations of, or prohibiting activities subject to, federal or state securities
laws or finding any violation of such laws.
 
    (g) The response to Item 2 of the Schedule 14D-1 is incorporated herein by
reference with respect to Parent and Purchaser. The citizenship of the directors
and executive officers of the Company are set forth in Schedule I to the Offer
to Purchase and are incorporated herein by reference.
 
ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS.
 
    (a)-(b) The response to Item 3 of the Schedule 14D-1 is incorporated herein
by reference.
 
ITEM 4. TERMS OF THE TRANSACTION.
 
    (a) The information set forth in the Offer to Purchase on the cover page
thereof and under "INTRODUCTION", "SPECIAL FACTORS -- Background of the Offer
and the Merger", "SPECIAL FACTORS -- The Merger Agreement", "THE TENDER OFFER --
Section 1. Terms of the Offer; Expiration Date", "THE TENDER OFFER -- Section 2.
Acceptance for Payment and Payment for Shares", "THE TENDER OFFER -- Section 3.
Procedures for Accepting the Offer and Tendering Shares", "THE TENDER OFFER
- --Section 4. Withdrawal Rights", "THE TENDER OFFER -- Section 10. Dividends and
Distributions", "THE TENDER OFFER -- Section 12. Certain Conditions of the
Offer", "THE TENDER OFFER -- Section 13. Certain Legal Matters and Regulatory
Approvals" and "THE TENDER OFFER -- Section 15. Miscellaneous" is incorporated
herein by reference.
 
    (b) Not applicable.
 
ITEM 5. PLANS OR PROPOSALS OF THE ISSUER OR AFFILIATE.
 
    (a)-(e) The response to Item 5(a)-(e) of the Schedule 14D-1 is incorporated
herein by reference.
 
    (f)-(g) The response to Item 5(f)-(g) of the Schedule 14D-1 is incorporated
herein by reference.
 
ITEM 6. SOURCE AND AMOUNTS OF FUNDS OR OTHER CONSIDERATION.
 
    (a) The response to Item 4(a) of the Schedule 14D-1 is incorporated herein
by reference.
 
                               Page 4 of 11 Pages
<PAGE>
    (b) The information set forth in the Offer to Purchase in "SPECIAL FACTORS
- -- Fees and Expenses" and "THE TENDER OFFER -- Section 14. Fees and Expenses" is
incorporated herein by reference.
 
    (c) Not applicable.
 
    (d) Not applicable.
 
ITEM 7. PURPOSE(S), ALTERNATIVES, REASONS AND EFFECTS.
 
    (a) The response to Item 5 of the Schedule 14D-1 is incorporated herein by
reference.
 
    (b) The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Recommendation of the Company's Board; Fairness of the Offer and the
Merger" and "SPECIAL FACTORS -- Purpose and Structure of the Offer and the
Merger; Reasons of Parent and Purchaser for the Offer and the Merger" is
incorporated herein by reference.
 
    (c)-(d) The information set forth in the Offer to Purchase under
"INTRODUCTION", "SPECIAL FACTORS -- Background of the Offer and the Merger",
"SPECIAL FACTORS -- Recommendation of the Company's Board; Fairness of the Offer
and the Merger", "SPECIAL FACTORS -- Purpose and Structure of the Offer and the
Merger; Reasons of Parent and Purchaser for the Offer and the Merger", "SPECIAL
FACTORS -- Plans for the Company After the Offer and the Merger; Certain Effects
of the Offer, "THE TENDER OFFER -- Section 5. Certain Federal Income Tax
Consequences" and "THE TENDER OFFER -- Section 11. Effect of the Offer on the
Market for the Shares, NASDAQ Quotation and Exchange Act Registration" is
incorporated herein by reference.
 
ITEM 8. FAIRNESS OF THE TRANSACTION.
 
    (a)-(e) The information set forth in the Offer to Purchase under
"INTRODUCTION", "SPECIAL FACTORS -- Background of the Offer and the Merger",
"SPECIAL FACTORS -- Recommendation of the Company's Board; Fairness of the Offer
and the Merger", "SPECIAL FACTORS -- Position of Parent and Purchaser Regarding
Fairness of the Offer and the Merger", "SPECIAL FACTORS -- Purpose and Structure
of the Offer and the Merger; Reasons of Parent and Purchaser for the Offer and
the Merger" is incorporated herein by reference.
 
    (f) Not applicable.
 
ITEM 9. REPORTS, OPINIONS, APPRAISALS AND CERTAIN NEGOTIATIONS.
 
    (a)-(c) The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Background of the Offer and the Merger", "SPECIAL FACTORS
- --Recommendation of the Company's Board; Fairness of the Offer and the Merger",
"SPECIAL FACTORS -- Opinion of Lehman Brothers Inc.", "SPECIAL FACTORS --
Position of Parent and Purchaser Regarding Fairness of the Offer and the
Merger", "SPECIAL FACTORS -- Analysis of Financial Advisor to Parent" and in
Schedule II is incorporated herein by reference.
 
ITEM 10. INTEREST IN SECURITIES OF THE ISSUER.
 
    (a) The response to Item 6(a) of the Schedule 14D-1 is incorporated herein
by reference.
 
    (b) Not applicable.
 
ITEM 11. CONTRACTS, ARRANGEMENTS OR UNDERSTANDINGS WITH RESPECT TO THE ISSUER'S
  SECURITIES.
 
    The response to Item 7 of the Schedule 14D-1 and the information set forth
in the Offer to Purchase under "SPECIAL FACTORS -- Beneficial Ownership of
Common Stock" are incorporated herein by reference.
 
                               Page 5 of 11 Pages
<PAGE>
ITEM 12. PRESENT INTENTION AND RECOMMENDATION OF CERTAIN PERSONS WITH REGARD TO
  THE OFFER AND THE MERGER.
 
    (a)-(b) The information set forth in the Offer to Purchase under
"INTRODUCTION", "SPECIAL FACTORS -- Background of the Offer and the Merger",
"SPECIAL FACTORS -- Recommendation of the Company's Board; Fairness of the Offer
and the Merger", "SPECIAL FACTORS--Interests of Certain Persons in the Offer and
the Merger" and "SPECIAL FACTORS -- Beneficial Ownership of Common Stock" is
incorporated herein by reference.
 
ITEM 13. OTHER PROVISIONS OF THE OFFER AND THE MERGER.
 
    (a) The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Rights of Stockholders in the Merger", "SPECIAL FACTORS -- The Merger
Agreement" and in Schedule III is incorporated herein by reference.
 
    (b) Not applicable.
 
    (c) Not applicable.
 
ITEM 14. FINANCIAL INFORMATION.
 
    (a) The information set forth in the Offer to Purchase under "THE TENDER
OFFER -- Section 7. Certain Information Concerning the Company" is incorporated
herein by reference. In addition, the Company's audited financial statements for
the fiscal years ended December 31, 1994 and December 31, 1995, and the
Company's unaudited financial statements for the period ended September 30,
1996, are attached to the Offer to Purchase as Schedules IV and V thereto,
respectively.
 
    (b) Not applicable.
 
ITEM 15. PERSONS AND ASSETS EMPLOYED, RETAINED OR UTILIZED.
 
    (a) The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Background of the Offer and the Merger", "SPECIAL FACTORS --
Recommendation of the Company's Board; Fairness of the Offer and the Merger",
"SPECIAL FACTORS --Plans for the Company After the Offer and the Merger; Certain
Effects of the Merger" and "THE TENDER OFFER -- Section 11. Effect of the Offer
on the Market for the Shares, NASDAQ Quotation and Exchange Act Registration" is
incorporated herein by reference.
 
    (b) The response to Item 8 of the Schedule 14D-1 is incorporated herein by
reference.
 
ITEM 16. ADDITIONAL INFORMATION.
 
    The response to Item 10(f) of the Schedule 14D-1 is incorporated herein by
reference.
 
                               Page 6 of 11 Pages
<PAGE>
ITEM 17. MATERIAL TO BE FILED AS EXHIBITS.
 
<TABLE>
<S>        <C>
(a)        Not applicable.
 
(b)(1)     Opinion of Lehman Brothers Inc., dated January 10, 1997 (attached as Schedule II to
           Exhibit (d)(1)).
 
(b)(2)     Presentation of Lehman Brothers Inc., dated January 6, 1997.
 
(b)(3)     Presentation of Morgan Stanley & Co. Incorporated, dated January 6, 1997.
 
(c)        Agreement and Plan of Merger, dated as of January 10, 1997, among Parent, Purchaser
           and the Company.
 
(d)(1)     Form of Offer to Purchase dated January 17, 1997.
 
(d)(2)     Form of Letter of Transmittal.
 
(d)(3)     Form of Letter from Morgan Stanley & Co. Incorporated to Brokers, Dealers, Commercial
           Banks, Trust Companies and Other Nominees.
 
(d)(4)     Form of Letter from Brokers, Dealers, Commercial Banks, Trust Companies and Other
           Nominees to Clients.
 
(d)(5)     Form of Notice of Guaranteed Delivery.
 
(d)(6)     Form of Guidelines for Certification of Taxpayer Identification Number on Substitute
           Form W-9.
 
(d)(7)     Summary Advertisement as published in the Wall Street Journal on January 17, 1997.
 
(d)(8)     Text of Joint Press Release dated January 13, 1997 issued by the Company and Parent.
 
(e)        Summary of Stockholder Appraisal Rights and Section 262 of the Delaware General
           Corporation Law (attached as Schedule III to Exhibit (d)(1)).
 
(f)        Not applicable.
</TABLE>
 
                               Page 7 of 11 Pages
<PAGE>
                                   SIGNATURES
 
    After due inquiry and to the best of its knowledge and belief, each of the
undersigned certifies that the information set forth in this statement is true,
complete and correct.
 
Dated: January 17, 1997         NOVARTIS BIOTECH HOLDING CORP.
 
                                By          /s/  Robert L. Thompson, Jr.
                                     -----------------------------------------
                                           Name:  Robert L. Thompson, Jr.
                                              Title:   Vice President
 
                                NOVARTIS INC.
 
                                By          /s/  Robert L. Thompson, Jr.
                                     -----------------------------------------
                                           Name:  Robert L. Thompson, Jr.
                                     Title:   Attorney-in-Fact
 
                               Page 8 of 11 Pages
<PAGE>
                                   SIGNATURE
 
    After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
 
Dated: January 17, 1997         SYSTEMIX, INC.
 
                                By              /s/ John J. Schwartz
                                     -----------------------------------------
                                           Name: John J. Schwartz, Ph.D.
                                        Title: President and Chief Executive
                                                      Officer
 
                               Page 9 of 11 Pages
<PAGE>
                               POWER OF ATTORNEY
 
                            ------------------------
 
KNOW ALL PERSONS BY THESE PRESENTS:
 
    That Novartis Inc., a Swiss corporation having its principal place of
business in the City of Basle, does hereby make, constitute and appoint:
 
       Robert L. Thompson, Jr. of 608 Fifth Avenue, New York, New York; and
       Wayne Merkelson of 608 Fifth Avenue, New York, New York;
 
or any one of them acting alone, its true and lawful attorneys, for it and in
its name, place and stead, with full power of substitution to act on its behalf
in connection with all matters related to the Agreement and Plan of Merger,
dated as of January 10, 1997, among Novartis Inc., Novartis Biotech Holding
Corp. and SyStemix, Inc. and the transactions contemplated thereby, and in
general to do all things and to perform on the part of Novartis Inc. all acts as
said attorneys, or any one of them acting alone, determines are necessary or
advisable in connection therewith, including, without limiting the generality of
the foregoing, the execution and delivery of one or more amendments thereto and
agreements, certificates and other documents and instruments related thereto,
the execution and filing with the United States Securities and Exchange
Commission of a Tender Offer Statement on Schedule 14D-1 and a Rule 13e-3
Transaction Statement on Schedule 13E-3, including one or more amendments and
supplements thereto, the execution and delivery of a Dealer Manager Agreement
with Morgan Stanley & Co. Incorporated and the execution and delivery of any and
all other documents and instruments required, contemplated by or deemed
advisable in connection with this Power of Attorney and to otherwise act for and
in the name of Novartis Inc. and in its behalf with respect to the transactions
described herein fully as if the duly authorized officers of Novartis Inc. were
then personally present and acting.
 
    Novartis Inc. hereby ratifies and confirms all that said attorneys or their
substitutes shall lawfully do, or cause to be done, by virtue hereof.
 
    IN WITNESS WHEREOF, Novartis Inc. has caused this Power of Attorney to be
signed by two duly authorized officers this 10th day of January, 1997.
 
                                          NOVARTIS INC.
 
                                          /s/ R. Breu        /s/Ch. Mader
                                          __________         ___________________
 
                                          R. Breu             Ch. Mader
 
                              Page 10 of 11 Pages
<PAGE>
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
 EXHIBIT                                                                                               SEQUENTIALLY
   NO.                                           DESCRIPTION                                           NUMBERED PAGE
- ---------  ----------------------------------------------------------------------------------------  -----------------
<C>        <S>                                                                                       <C>
      (a)  Not applicable.
 
   (b)(1)  Opinion of Lehman Brothers Inc., dated January 10, 1997 (attached as Schedule II to
             Exhibit (d)(1)).
 
   (b)(2)  Presentation of Lehman Brothers Inc., dated January 6, 1997.
 
   (b)(3)  Presentation of Morgan Stanley & Co. Incorporated, dated January 6, 1997.
 
      (c)  Agreement and Plan of Merger dated as of January 10, 1997 among Parent, Purchaser and
             the Company.
 
   (d)(1)  Form of Offer to Purchase dated January 17, 1997.
 
   (d)(2)  Form of Letter of Transmittal.
 
   (d)(3)  Form of Letter from Morgan Stanley & Co. Incorporated to Brokers, Dealers, Commercial
             Banks, Trust Companies and Other Nominees.
 
   (d)(4)  Form of Letter from Brokers, Dealers, Commercial Banks, Trust Companies and Other
             Nominees to Clients.
 
   (d)(5)  Form of Notice of Guaranteed Delivery.
 
   (d)(6)  Form of Guidelines for Certification of Taxpayer Identification Number on Substitute
             Form W-9.
 
   (d)(7)  Summary Advertisement as published in the Wall Street Journal on January 17, 1997.
 
   (d)(8)  Text of Joint Press Release dated January 13, 1997 issued by the Company and Parent.
 
      (e)  Summary of Stockholder Appraisal Rights and Section 262 of the Delaware General
             Corporation Law (attached as Schedule III to Exhibit (d)(1)).
 
      (f)  Not applicable.
</TABLE>
 
                              Page 11 of 11 Pages

<PAGE>

                                                                    Confidential



                          PROJECT CENTENNIAL

                          Presentation to the Independent Board of Directors



                          January 6, 1997



                          LEHMAN BROTHERS

<PAGE>

Table of Contents
================================================================================

     I.   Transaction Summary

     ---------------------------------------------------------------------------

     II.  Valuation of Sprint

          A.   Stock Price and Volume History

          B.   Comparable Company Analysis

          C.   Historical and Projected Financial Statements

          D.   Discounted Cash Flow Analysis

          E.   Comparable Transaction Analysis

     ---------------------------------------------------------------------------

     III. Alternative Financing Environment

     ---------------------------------------------------------------------------

     Exhibits

          A.   Comparable Company Analysis

          B.   Comparable Transaction Analysis

          C.   Discounted Cash Flow Analysis

          D.   Summary of Recent Biotechnology Equity Offerings
<PAGE>





                                 LEHMAN BROTHERS

I
<PAGE>

Transaction Summary
================================================================================

Summary of Proposed Transaction Terms
($ in millions, except per share data)

<TABLE>
<CAPTION>

<S>                                                                       <C>   
Proposed Offer Price per Share                                                  $19.50
Purchase Premium
- ---------------------------------------------------------------------------------------
      Over Initial Pre-Announcement Closing Price of $11.00 (5/23/96)             77.3%
      Over Current Pre-Announcement Closing Price of $15.06 (1/3/97)              29.5%
      Over Previous 30 Day Closing Price of $14.50                                34.5%
      Over 52 Week High of $18.63 (5/24/96)                                        4.7%
      Over 52 Week Low of $11.00 (5/23/96)                                        77.3%
- ---------------------------------------------------------------------------------------
Cost of Outstanding Shares (a)(e)                                         $ 75,832,965
Plus Cost of Conversion Shares(b)(c)                                        33,036,530
Less Option Proceeds                                                       (28,387,697)
                                                                           -----------
      Consideration Paid(d)                                                 80,481,798
Implied Value of Hurdle Shares at $19.50 per Share                         206,896,931
                                                                           -----------
      Implied Equity Value                                                 287,378,728
Less Net Cash(f)                                                           (19,012,000)
                                                                           -----------
      Implied Firm Value                                                   268,366,728
                                                                           ===========
Firm Value Ranking Among All Public Biotechnology Companies (over 300)            + 30(g)
</TABLE>

- -----------
(a) Assumes 3,888,870 shares outstanding
(b) All 1,694,181 options are assumed to vest upon completion of transaction.
(c) Assumes an average exercise price of $16.76 for all vested options.
(d) Consideration Paid calculation does not include fees and expenses.
(e) Assumes Hurdle owns 10,610,099 shares.  Excludes 1,367,000 of Hurdles 
    out-of-the-money warrants with an exercise price of $27.50 per warrant.
(f) Net Cash at 12/31/96 includes $25.0 million of cash and $6.0 million of 
    debt, per discussion with Company management.
(g) Excludes eight companies with substantial revenues and profits.


                                       1
<PAGE>

Transaction Summary
================================================================================

Ownership


(000)                           Sprint Ownership
                               September 30, 1996
- --------------------------------------------------------------------------------
                                         Shares          Value       % Ownership
                                         ------          -----       -----------
 Beneficial Owners (>5%)

 Sandoz Ltd.                             10,610        $159,788          73.2%

 Morgan Guarantee Trust Co.(a)            1,252          18,853           8.6
                                         ------        --------         ----- 
 Total Beneficial Owners                 11,862         178,641          81.8


 Institutional Holdings                   1,290          19,432           8.9

 Officers, Directors and Management(b)      191           2,872           1.3

 Other Shareholders                       1,156          17,409           8.0
                                         ------        --------         ----- 
 Total Shares Outstanding                14,499        $218,354         100.0%
                                         ======        ========         ===== 

- -----------
(a) Morgan Guarantee Trust Co. Shares held by Eli Jacobs.
(b) Represents total shares held by officers, directors and senior management
    per the Company's May 31, 1996 Proxy Statement. Excludes all options.

<PAGE>





                                 LEHMAN BROTHERS

II
<PAGE>





                                 LEHMAN BROTHERS

A
<PAGE>

Stock Price and Volume History
================================================================================

Sprint Share Price History

8/7/91 (IPO) to 1/3/97

[The following table was represented as a line graph in the printed material.]

  Date             Volume          High        Low       Close
- ---------------------------------------------------------------
08/07/91           762700         21.750      20.500     20.750
08/08/91           124100         22.250      20.500     21.500
08/09/91            72500         23.500      21.750     22.250
08/12/91            24400         22.750      21.000     21.500
08/13/91           120000         21.500      20.750     20.750
08/14/91            27200         21.250      20.750     21.250
08/15/91           122700         21.500      21.000     21.500
08/16/91             7800         21.750      21.000     21.000
08/19/91           155700         20.250      19.000     19.000
08/20/91           172300         19.750      19.125     19.125
08/21/91            11300         20.000      19.250     19.750
08/22/91            46500         20.250      19.750     20.000
08/23/91            28100         20.000      19.500     19.750
08/26/91            32600         21.000      19.750     21.000
08/27/91            87700         23.500      21.000     23.375
08/28/91            83800         24.250      23.000     23.750
08/29/91           276100         25.750      23.500     25.250
08/30/91             6900         25.750      25.000     25.375
09/02/91             #N/A         25.750      25.000     25.375
09/03/91            18100         26.000      25.000     26.000
09/04/91            14200         26.000      25.500     25.875
09/05/91             8000         26.000      25.000     25.000
09/06/91           111400         27.000      25.000     26.250
09/09/91           339600         32.000      27.000     31.750
09/10/91           285800         35.500      31.250     32.250
09/11/91           161000         32.500      30.500     32.125
09/12/91           113200         35.000      32.500     34.750
09/13/91            75500         36.000      33.000     33.250
09/16/91            43400         34.000      33.000     33.500
09/17/91            49500         33.000      30.500     31.250
09/18/91            82800         32.250      30.500     31.750
09/19/91           120000         34.000      31.250     33.250
09/20/91           123500         35.250      34.000     34.250
09/23/91            98500         34.250      31.750     32.500
09/24/91           127000         32.500      29.500     31.500
09/25/91            93700         31.500      30.500     31.000
09/26/91            41000         31.750      30.500     31.000
09/27/91            34700         32.000      31.000     31.250
09/30/91            20800         32.500      31.000     32.000
10/01/91           199500         35.750      32.750     35.000
10/02/91            84000         36.000      34.500     34.750
10/03/91            39600         34.750      33.000     33.500
10/04/91            29100         33.875      32.250     32.500
10/07/91           136500         32.750      29.250     29.375
10/08/91            55100         30.250      28.500     29.000
10/09/91            28400         29.250      27.000     27.500
10/10/91           120900         27.750      25.000     27.250
10/11/91            79000         29.500      28.000     29.250
10/14/91            47000         31.500      29.250     31.250
10/15/91            79300         32.750      31.000     32.000
10/16/91            77300         33.000      31.250     32.000
10/17/91            46200         32.750      31.250     31.750
10/18/91            18600         33.250      31.750     33.250
10/21/91            49400         33.250      31.500     32.500
10/22/91            28200         33.750      32.000     32.500
10/23/91           206500         38.750      32.000     37.250
10/24/91           112700         38.500      33.250     34.500
10/25/91            69700         34.000      31.500     33.250
10/28/91            24000         34.000      33.250     34.000
10/29/91            22100         34.750      33.250     33.250
10/30/91            15800         34.750      33.750     34.500
10/31/91           130700         40.250      34.750     39.500
11/01/91           803200         44.500      42.250     44.000
11/04/91           615800         47.750      45.750     47.500
11/05/91           275100         52.750      47.000     51.875
11/06/91           392900         56.250      52.375     55.000
11/07/91           398800         54.500      45.250     50.000
11/08/91           101900         50.500      47.500     48.500
11/11/91            24600         49.000      47.500     48.750
11/12/91            98000         48.750      45.500     46.000
11/13/91           171500         46.250      43.750     44.750
11/14/91           217400         45.000      40.500     40.750
11/15/91           566200         40.500      32.250     34.750
11/18/91           412700         39.500      32.000     39.000
11/19/91           358800         39.000      33.500     36.250
11/20/91           154400         37.500      33.000     35.500
11/21/91            49900         37.500      34.500     35.500
11/22/91            77800         36.500      32.250     34.250
11/25/91            38900         34.750      32.500     33.750
11/26/91            70500         35.000      33.500     34.000
11/27/91            38400         34.750      33.500     34.000
11/28/91             #N/A         34.750      33.500     34.000
11/29/91            13700         34.750      33.500     34.375
12/02/91            47300         35.000      32.750     35.000
12/03/91            71700         35.000      33.750     34.500
12/04/91            64700         35.000      34.000     34.500
12/05/91           152200         34.750      33.000     33.375
12/06/91            45600         34.500      33.250     33.750
12/09/91            80800         34.500      33.250     33.500
12/10/91            30800         34.250      32.500     33.500
12/11/91            19200         34.250      32.750     33.500
12/12/91            43300         33.500      32.750     33.000
12/13/91            34000         33.750      33.000     33.250
12/16/91           627400         57.000      33.250     53.000
12/17/91           485200         56.000      53.250     55.000
12/18/91           120900         55.000      54.000     54.500
12/19/91            64700         55.000      54.000     54.000
12/20/91           429200         54.500      53.000     53.000
12/23/91            37900         54.000      53.000     53.250
12/24/91            55300         54.000      53.250     53.750
12/25/91             #N/A         54.000      53.250     53.750
12/26/91             6200         54.000      53.500     53.500
12/27/91            42700         54.000      53.500     53.500
12/30/91            42700         54.500      53.500     54.000
12/31/91            58800         55.250      53.750     54.750
01/01/92             #N/A         55.250      53.750     54.750
01/02/92           175300         55.000      54.500     54.500
01/03/92            44400         55.500      54.750     55.000
01/06/92            56400         56.500      55.000     56.000
01/07/92           117600         58.750      56.000     58.500
01/08/92           102200         58.750      57.750     58.500
01/09/92            64700         59.000      58.000     59.000
01/10/92            47100         59.000      58.250     59.000
01/13/92             9700         59.000      58.250     58.500
01/14/92            56900         59.500      58.500     59.000
01/15/92           127000         60.250      59.250     59.625
01/16/92             7600         60.250      59.250     60.250
01/17/92            59600         60.375      59.250     59.750
01/20/92            14500         60.000      58.750     58.750
01/21/92             2800         59.500      58.750     58.750
01/22/92            74400         60.500      59.000     60.250
01/23/92            17000         60.500      59.750     60.250
01/24/92            24600         60.250      59.750     59.750
01/27/92            20600         60.000      59.500     59.500
01/28/92            97100         59.500      58.500     59.000
01/29/92            84200         59.000      58.000     58.000
01/30/92            64600         58.500      57.750     58.250
01/31/92           102800         58.500      57.500     57.500
02/03/92             1000         58.250      58.000     58.000
02/04/92            17000         58.250      57.500     57.500
02/05/92            66400         58.250      56.750     56.750
02/06/92           107400         57.250      56.250     56.250
02/07/92            78600         57.000      55.750     55.750
02/10/92            55700         56.250      55.250     55.250
02/11/92           163000         55.750      54.750     55.500
02/12/92            42400         55.250      54.750     55.250
02/13/92            38700         55.250      54.750     55.000
02/14/92            64700         55.250      54.000     54.000
02/17/92             #N/A         55.250      54.000     54.000
02/18/92            26100         55.000      54.250     54.750
02/19/92           112800         52.500      39.750     39.750
02/20/92            20500         40.250      39.750     40.250
02/21/92            80200         41.750      40.000     41.500
02/24/92             1800         41.500      41.000     41.000
02/25/92            18600         41.500      41.000     41.500
02/26/92             2200         41.500      41.250     41.500
02/27/92            11000         41.750      41.000     41.250
02/28/92            20100         41.750      40.750     40.750
03/02/92            42300         41.500      40.500     41.500
03/03/92            15900         41.500      40.250     40.625
03/04/92            44100         40.750      38.500     38.500
03/05/92           116600         39.000      35.250     35.250
03/06/92            30200         36.250      35.250     36.000
03/09/92            25600         36.250      35.500     36.000
03/10/92             9400         36.500      35.750     36.500
03/11/92             9600         36.500      35.750     36.000
03/12/92            98600         36.250      35.750     35.875
03/13/92            63800         36.250      35.750     36.000
03/16/92             9500         36.125      35.750     36.125
03/17/92            55200         36.500      35.500     35.625
03/18/92             1700         36.250      35.750     35.750
03/19/92             3000         36.250      35.750     35.750
03/20/92            13300         36.000      35.750     35.750
03/23/92            92200         36.000      35.750     35.750
03/24/92            23100         36.000      35.500     35.500
03/25/92             1600         36.000      35.500     36.000
03/26/92             6800         36.000      35.500     35.500
03/27/92             9500         36.000      35.500     35.625
03/30/92            20900         36.000      34.250     34.250
03/31/92            13800         35.000      34.250     34.375
04/01/92            11300         35.000      34.250     34.250
04/02/92            27200         35.500      34.250     35.000
04/03/92            16400         35.500      34.500     34.500
04/06/92             7000         35.500      34.500     34.750
04/07/92            21200         35.250      34.250     34.250
04/08/92            30600         34.250      33.250     33.500
04/09/92             3900         34.250      33.500     33.500
04/10/92            49300         33.750      31.000     31.500
04/13/92            20500         32.250      30.250     31.250
04/14/92            34600         31.250      28.250     28.625
04/15/92            41100         29.750      28.500     28.750
04/16/92            16500         29.500      28.500     29.500
04/17/92             #N/A         29.500      28.500     29.500
04/20/92            47600         29.500      27.250     29.000
04/21/92            28900         30.500      28.750     30.375
04/22/92            16700         29.875      28.500     28.500
04/23/92            11300         29.000      28.000     28.125
04/24/92             5900         29.250      28.000     28.000
04/27/92             4900         28.125      27.750     28.125
04/28/92             3300         28.250      27.250     27.250
04/29/92             8900         28.000      27.000     27.000
04/30/92            30300         29.500      27.250     29.250
05/01/92             8100         29.500      28.500     29.250
05/04/92             4400         29.250      29.250     29.250
05/05/92            30400         29.750      28.250     29.750
05/06/92             4400         30.750      29.750     30.750
05/07/92             5900         30.750      29.750     30.500
05/08/92             1100         30.500      29.500     30.500
05/11/92              300         29.500      29.500     29.500
05/12/92             3000         29.500      29.500     29.500
05/13/92              300         30.500      29.500     29.500
05/14/92           166700         30.000      28.000     28.000
05/15/92            32900         29.000      27.750     28.000
05/18/92            16100         28.250      27.000     27.750
05/19/92             6900         27.750      27.000     27.750
05/20/92            47500         28.000      27.000     27.750
05/21/92             1600         27.750      27.250     27.750
05/22/92             1200         27.000      27.000     27.000
05/25/92             #N/A         27.000      27.000     27.000
05/26/92              200         27.750      27.750     27.750
05/27/92            31000         27.750      25.750     25.750
05/28/92             1400         26.000      25.000     25.000
05/29/92             6400         26.250      26.000     26.000
06/01/92            10200         26.250      25.000     25.500
06/02/92             2200         26.250      25.250     25.250
06/03/92            12200         26.250      25.250     26.250
06/04/92            24600         27.500      25.500     26.250
06/05/92            23400         27.500      26.500     27.000
06/08/92              600         26.500      26.500     26.500
06/09/92             8100         27.500      26.500     27.000
06/10/92             9600         27.500      26.500     27.500
06/11/92            10300         27.500      26.500     27.500
06/12/92             1800         27.750      26.500     26.500
06/15/92             3000         27.750      26.500     27.750
06/16/92             5100         27.750      26.500     26.500
06/17/92            15500         28.250      27.000     27.500
06/18/92              500         28.250      28.250     28.250
06/19/92            11800         28.750      27.000     28.750
06/22/92             4100         28.500      27.000     28.500
06/23/92             5400         27.750      27.000     27.750
06/24/92             3600         28.250      27.250     28.250
06/25/92                0         28.250      27.250     27.250
06/26/92             6000         28.250      27.250     28.250
06/29/92            19900         28.750      27.250     28.750
06/30/92            21900         29.250      27.750     29.250
07/01/92             8800         29.500      29.250     29.250
07/02/92             1700         29.500      29.250     29.250
07/03/92             #N/A         29.500      29.250     29.250
07/06/92             6600         29.250      28.000     29.250
07/07/92             8300         29.500      28.250     29.500
07/08/92              300         29.500      28.250     28.750
07/09/92             2500         29.500      28.250     29.500
07/10/92            12700         29.500      28.500     28.500
07/13/92             8900         29.125      28.750     29.000
07/14/92              700         29.750      29.375     29.750
07/15/92            12900         30.750      29.250     30.750
07/16/92             2200         30.750      30.750     30.750
07/17/92             4900         30.000      29.750     29.750
07/20/92             6700         30.000      29.750     29.750
07/21/92              500         30.750      30.000     30.000
07/22/92            10700         30.750      30.750     30.750
07/23/92            30800         31.750      30.125     30.750
07/24/92            11600         32.000      31.000     32.000
07/27/92             7100         32.500      31.250     32.500
07/28/92            29700         36.250      32.250     36.000
07/29/92            82200         39.500      36.000     37.000
07/30/92             8000         37.000      35.750     36.500
07/31/92             7300         37.000      35.250     36.500
08/03/92            11400         36.500      35.500     35.750
08/04/92             6500         36.750      35.750     36.250
08/05/92             2800         36.500      35.750     35.750
08/06/92             5900         36.000      35.250     35.250
08/07/92             5700         36.000      33.750     33.750
08/10/92              400         35.250      34.250     34.750
08/11/92             3400         35.250      34.000     34.250
08/12/92             5600         35.750      34.750     34.750
08/13/92             6700         35.000      33.750     33.750
08/14/92             4500         34.500      33.000     33.000
08/17/92           196900         27.500      21.500     23.750
08/18/92            88600         25.500      22.750     24.625
08/19/92            47900         24.750      23.000     23.750
08/20/92            32000         23.500      22.000     22.000
08/21/92            13500         23.000      21.750     21.750
08/24/92            30200         22.750      19.500     20.000
08/25/92            24300         20.250      19.500     20.000
08/26/92             1500         20.500      19.750     19.750
08/27/92             1700         20.500      19.750     19.750
08/28/92             7900         20.250      19.000     19.250
08/31/92             6600         20.250      19.000     20.000
09/01/92             2600         20.250      19.000     20.250
09/02/92              600         20.250      19.000     19.000
09/03/92             9900         20.750      20.000     20.000
09/04/92             9200         21.000      19.750     19.750
09/07/92             #N/A         21.000      19.750     19.750
09/08/92            17800         22.500      20.000     21.250
09/09/92             5300         21.500      20.750     21.500
09/10/92            27200         22.000      20.750     21.000
09/11/92             5600         21.625      20.750     20.750
09/14/92             3500         22.250      21.000     21.750
09/15/92              900         22.250      20.750     21.000
09/16/92             1900         22.000      20.750     22.000
09/17/92              200         22.000      20.750     20.750
09/18/92             1300         22.000      20.250     22.000
09/21/92             1000         22.000      20.750     20.750
09/22/92             9900         22.000      20.750     20.750
09/23/92            22100         21.500      20.250     20.750
09/24/92            14300         20.750      19.500     20.000
09/25/92            18100         20.500      19.250     19.250
09/28/92              300         20.000      20.000     20.000
09/29/92            19900         19.750      18.500     19.125
09/30/92            15800         19.500      18.750     19.000
10/01/92             3200         19.500      19.250     19.250
10/02/92              700         19.000      19.000     19.000
10/05/92             1700         19.500      18.500     19.500
10/06/92            14700         19.500      18.750     19.250
10/07/92             1000         18.750      18.750     18.750
10/08/92            15500         19.000      18.000     18.250
10/09/92             1900         19.250      18.250     18.250
10/12/92             8400         19.250      18.250     19.250
10/13/92            18200         19.250      18.250     19.250
10/14/92            30900         19.250      18.250     18.875
10/15/92            16200         19.000      18.250     18.500
10/16/92            17600         19.000      18.500     19.000
10/19/92             3200         19.000      18.500     18.500
10/20/92             1000         19.000      18.500     18.500
10/21/92              700         19.000      18.500     18.500
10/22/92            24500         19.000      18.500     18.750
10/23/92                0         19.500      18.750     18.750
10/26/92             3000         19.500      18.750     19.500
10/27/92             9100         21.000      19.250     20.000
10/28/92             1700         20.500      19.250     19.250
10/29/92             1000         20.500      20.500     20.500
10/30/92              900         20.500      19.000     20.000
11/02/92             1200         20.500      19.500     20.500
11/03/92            19000         21.000      19.750     21.000
11/04/92             8900         21.000      20.125     20.500
11/05/92            12600         22.625      20.000     22.625
11/06/92            36000         24.000      22.250     23.750
11/09/92            12800         24.500      23.250     23.250
11/10/92             7600         24.750      23.250     23.250
11/11/92            17900         24.000      22.250     24.000
11/12/92            19900         24.250      21.750     22.250
11/13/92              700         22.000      22.000     22.000
11/16/92             4800         23.000      22.000     23.000
11/17/92              600         23.000      22.000     22.000
11/18/92              800         23.000      22.000     22.000
11/19/92              200         23.000      23.000     23.000
11/20/92             1900         23.000      22.000     23.000
11/23/92             5500         23.000      22.000     22.500
11/24/92            10900         23.000      22.000     23.000
11/25/92            24900         23.000      22.000     22.875
11/26/92             #N/A         23.000      22.000     22.875
11/27/92            14100         22.250      22.000     22.000
11/30/92            14100         22.750      22.500     22.750
12/01/92             6000         23.000      22.250     23.000
12/02/92             7800         23.500      22.500     23.500
12/03/92            16400         25.000      23.000     23.500
12/04/92            14800         24.500      23.500     24.000
12/07/92            22200         24.500      23.500     24.500
12/08/92             8700         25.000      23.750     25.000
12/09/92             4600         25.250      24.500     24.500
12/10/92             2200         25.250      24.500     25.250
12/11/92            10700         25.000      24.000     24.000
12/14/92             6500         25.000      24.000     24.000
12/15/92            25300         25.000      22.750     22.750
12/16/92             8600         23.250      22.750     23.250
12/17/92             6300         22.875      22.750     22.750
12/18/92             8100         23.000      22.500     22.625
12/21/92            10700         23.000      22.500     23.000
12/22/92             6300         23.500      22.500     22.750
12/23/92            27100         24.000      22.750     23.000
12/24/92             1300         22.875      22.750     22.875
12/25/92             #N/A         22.875      22.750     22.875
12/28/92             3200         23.750      22.750     22.750
12/29/92             2300         23.125      22.750     22.750
12/30/92             1900         23.000      22.750     23.000
12/31/92             5800         23.500      23.000     23.125
01/01/93             #N/A         23.500      23.000     23.125
01/04/93            20800         23.750      23.000     23.500
01/05/93            19500         24.750      23.250     24.000
01/06/93             3500         25.000      24.250     24.250
01/07/93             5800         25.250      24.500     24.500
01/08/93             7100         25.000      24.250     25.000
01/11/93             6000         24.500      24.000     24.500
01/12/93              300         24.000      24.000     24.000
01/13/93             1500         24.500      24.000     24.000
01/14/93             3800         24.500      24.000     24.500
01/15/93              200         25.000      24.000     25.000
01/18/93             3200         25.250      24.000     25.000
01/19/93            20400         25.000      24.500     25.000
01/20/93            33900         25.000      24.750     24.875
01/21/93              200         24.250      24.250     24.250
01/22/93             5400         24.250      24.000     24.000
01/25/93             1200         24.000      24.000     24.000
01/26/93             2600         24.250      23.750     23.750
01/27/93            21600         24.000      23.000     23.000
01/28/93              300         23.500      23.500     23.500
01/29/93              600         23.750      22.750     22.750
02/01/93              500         22.750      22.750     22.750
02/02/93             3500         23.750      22.750     23.750
02/03/93             1500         23.000      22.750     22.750
02/04/93             8300         23.000      21.750     22.750
02/05/93            17000         22.500      20.250     20.250
02/08/93            17900         20.000      18.750     19.000
02/09/93             8200         19.500      19.000     19.000
02/10/93             2700         19.500      18.250     18.500
02/11/93             6500         19.000      18.250     18.750
02/12/93            22100         19.750      18.250     18.250
02/15/93             #N/A         19.750      18.250     18.250
02/16/93             2100         19.750      18.750     19.750
02/17/93             7400         20.250      18.750     20.250
02/18/93             1600         20.500      19.750     20.500
02/19/93             1300         20.500      19.000     20.500
02/22/93             5400         20.500      19.250     19.250
02/23/93            16000         20.750      19.000     19.000
02/24/93            10700         20.250      18.625     18.625
02/25/93             6000         19.250      18.000     18.000
02/26/93             7200         19.000      17.750     18.250
03/01/93             2900         18.250      17.750     18.250
03/02/93             6700         18.250      17.000     18.250
03/03/93                0         18.250      17.000     17.000
03/04/93             1600         18.000      17.000     17.000
03/05/93            18000         17.625      17.500     17.500
03/08/93             1100         17.750      17.000     17.000
03/09/93              800         17.750      17.000     17.000
03/10/93            12900         17.625      16.250     16.250
03/11/93              700         17.250      15.750     17.250
03/12/93             7000         16.750      16.250     16.750
03/15/93             3200         16.250      16.250     16.250
03/16/93            74100         17.000      16.000     16.625
03/17/93            10000         18.000      16.250     17.500
03/18/93            11600         18.500      17.500     17.500
03/19/93              500         18.250      17.250     18.250
03/22/93             1900         18.250      17.250     17.500
03/23/93              200         17.250      17.250     17.250
03/24/93              300         18.250      17.000     17.000
03/25/93                0         18.250      17.000     17.000
03/26/93             1500         17.000      17.000     17.000
03/29/93            14000         18.250      17.250     18.000
03/30/93            14200         19.250      18.250     18.500
03/31/93            10500         20.500      18.500     20.000
04/01/93            23900         19.000      18.250     19.000
04/02/93             1900         19.500      19.500     19.500
04/05/93            14000         19.000      17.750     17.750
04/06/93              100         17.750      17.750     17.750
04/07/93              100         17.750      17.750     17.750
04/08/93             2200         19.000      17.750     17.750
04/09/93             #N/A         19.000      17.750     17.750
04/12/93              300         19.000      19.000     19.000
04/13/93             1000         19.000      17.750     17.750
04/14/93            60100         18.500      17.750     18.500
04/15/93             1900         19.250      18.250     18.250
04/16/93              100         19.250      19.250     19.250
04/19/93            51300         18.750      18.250     18.250
04/20/93                0         19.250      18.250     18.250
04/21/93             6600         19.250      18.500     18.875
04/22/93             7700         19.250      18.500     18.500
04/23/93            13200         18.500      17.750     18.000
04/26/93            11900         18.500      16.750     16.750
04/27/93            17200         17.000      16.750     16.875
04/28/93             3200         17.500      16.750     17.500
04/29/93                0         18.250      16.750     16.750
04/30/93             2100         17.250      16.750     17.250
05/03/93             1000         16.875      16.875     16.875
05/04/93             1900         18.000      16.750     16.750
05/05/93              700         18.000      18.000     18.000
05/06/93             1000         17.500      17.500     17.500
05/07/93              800         16.750      16.750     16.750
05/10/93             2700         17.000      16.750     16.750
05/11/93             1000         17.750      17.750     17.750
05/12/93             5200         17.750      16.750     17.000
05/13/93              200         16.750      16.750     16.750
05/14/93                0         17.500      16.750     16.750
05/17/93             5700         17.500      16.875     17.000
05/18/93             3000         16.750      16.750     16.750
05/19/93             4300         17.500      16.750     17.250
05/20/93           101300         17.500      16.750     17.125
05/21/93            31100         17.500      16.750     17.000
05/24/93             1100         16.750      16.750     16.750
05/25/93             2200         17.750      17.000     17.000
05/26/93              200         17.000      17.000     17.000
05/27/93             3000         17.750      17.000     17.000
05/28/93             1500         18.750      17.250     18.000
05/31/93             #N/A         18.750      17.250     18.000
06/01/93              500         17.250      17.250     17.250
06/02/93             4400         18.500      17.750     18.000
06/03/93             4400         18.500      18.000     18.250
06/04/93            17600         18.000      17.250     18.000
06/07/93             1700         18.000      17.750     17.750
06/08/93              600         17.750      17.750     17.750
06/09/93             5600         17.750      17.250     17.500
06/10/93              200         17.250      17.250     17.250
06/11/93              200         18.000      18.000     18.000
06/14/93             1200         18.000      17.250     17.375
06/15/93                0         18.000      17.250     17.250
06/16/93             1200         17.500      17.250     17.500
06/17/93                0         17.750      16.750     16.750
06/18/93                0         17.750      16.750     16.750
06/21/93             3700         18.000      16.750     17.000
06/22/93             1400         18.000      17.000     17.000
06/23/93              300         17.000      17.000     17.000
06/24/93            12500         18.750      18.000     18.000
06/25/93             5800         18.250      17.500     17.500
06/28/93             2400         18.125      18.000     18.125
06/29/93              500         18.500      18.000     18.500
06/30/93             3400         18.500      18.000     18.500
07/01/93             8800         18.500      18.125     18.250
07/02/93            10600         18.250      17.500     17.750
07/05/93             #N/A         18.250      17.500     17.750
07/06/93                0         18.500      17.750     17.750
07/07/93             1100         18.500      18.500     18.500
07/08/93             3800         18.250      18.000     18.250
07/09/93                0         18.250      17.750     17.750
07/12/93             3800         18.250      17.750     18.000
07/13/93             3200         18.000      17.750     18.000
07/14/93             1400         18.250      18.000     18.000
07/15/93             2500         18.000      18.000     18.000
07/16/93             2600         18.250      18.000     18.000
07/19/93             5300         18.125      18.000     18.000
07/20/93            11800         17.875      17.000     17.000
07/21/93             1200         18.000      16.500     18.000
07/22/93             1800         17.500      16.500     17.375
07/23/93             1200         16.500      16.500     16.500
07/26/93              300         18.000      16.500     18.000
07/27/93             2000         17.500      17.000     17.500
07/28/93              900         18.000      17.000     17.000
07/29/93             1400         18.000      17.000     17.750
07/30/93             1000         18.000      17.000     17.000
08/02/93                0         18.000      17.000     17.000
08/03/93                0         18.000      17.000     17.000
08/04/93              200         17.000      17.000     17.000
08/05/93             2800         17.500      17.000     17.000
08/06/93              500         17.750      17.000     17.750
08/09/93             2300         17.750      16.500     17.750
08/10/93             3100         17.750      16.500     17.000
08/11/93             6100         17.500      16.875     17.500
08/12/93              700         18.000      17.375     17.500
08/13/93                0         18.000      17.000     17.000
08/16/93              900         18.000      17.000     18.000
08/17/93             1500         16.750      16.750     16.750
08/18/93             9600         18.000      16.750     16.750
08/19/93            12200         18.000      16.750     16.750
08/20/93              300         17.500      16.750     16.750
08/23/93             9800         17.000      16.000     17.000
08/24/93            15300         17.000      16.750     16.750
08/25/93             5800         17.000      16.250     16.500
08/26/93             1000         16.000      16.000     16.000
08/27/93             2200         16.750      16.625     16.750
08/30/93              500         16.750      16.000     16.750
08/31/93              100         16.000      16.000     16.000
09/01/93             1800         16.750      16.000     16.000
09/02/93            18700         16.250      15.750     16.250
09/03/93             3500         16.250      15.750     16.125
09/06/93             #N/A         16.250      15.750     16.125
09/07/93             2500         16.250      16.000     16.250
09/08/93             8700         16.250      15.750     16.000
09/09/93             8800         16.250      15.750     16.000
09/10/93              300         16.250      15.750     15.750
09/13/93              600         16.250      15.750     16.000
09/14/93              200         15.750      15.750     15.750
09/15/93            10900         16.250      16.125     16.250
09/16/93            18200         16.500      16.125     16.500
09/17/93             3000         16.625      16.500     16.500
09/20/93            19500         18.000      16.750     18.000
09/21/93              200         18.000      18.000     18.000
09/22/93             1000         17.500      17.250     17.250
09/23/93             1100         18.000      17.250     17.250
09/24/93             1800         17.750      17.000     17.000
09/27/93             4600         18.000      17.500     18.000
09/28/93             4900         18.000      17.500     17.625
09/29/93              200         17.750      17.750     17.750
09/30/93             1200         17.750      17.250     17.625
10/01/93              900         17.250      17.250     17.250
10/04/93             7400         17.750      17.500     17.750
10/05/93             6800         17.750      17.500     17.500
10/06/93             1000         17.500      17.500     17.500
10/07/93             3700         17.625      17.500     17.625
10/08/93             7700         17.750      17.750     17.750
10/11/93             5300         18.000      17.500     18.000
10/12/93            23400         18.250      17.500     18.250
10/13/93            27100         18.750      17.750     18.750
10/14/93             1700         18.750      18.000     18.000
10/15/93            21300         19.000      18.750     19.000
10/18/93             6600         19.250      18.250     19.250
10/19/93              400         19.250      19.250     19.250
10/20/93             1600         19.250      18.750     18.750
10/21/93            14600         20.000      19.250     20.000
10/22/93            28500         22.000      19.500     22.000
10/25/93             2700         22.000      22.000     22.000
10/26/93            28700         21.500      20.250     20.875
10/27/93             4600         20.625      20.500     20.500
10/28/93            12000         20.500      19.500     19.875
10/29/93             1900         20.000      19.500     20.000
11/01/93             2000         20.000      19.500     20.000
11/02/93            14900         20.000      18.750     19.250
11/03/93            22900         19.250      18.875     19.000
11/04/93             2100         19.000      18.750     18.750
11/05/93             1900         19.250      19.000     19.250
11/08/93             1600         19.250      18.500     19.250
11/09/93              100         18.750      18.750     18.750
11/10/93             3200         19.250      18.500     19.000
11/11/93              400         18.875      18.875     18.875
11/12/93             1200         19.250      18.625     18.875
11/15/93            22200         18.500      17.250     17.250
11/16/93             2000         17.750      17.250     17.500
11/17/93              100         17.250      17.250     17.250
11/18/93            33100         17.750      15.750     16.000
11/19/93            21900         16.000      15.250     15.750
11/22/93            13500         16.000      15.000     15.250
11/23/93            22000         16.000      15.000     16.000
11/24/93             8200         16.750      16.000     16.750
11/25/93             #N/A         16.750      16.000     16.750
11/26/93              800         16.750      16.750     16.750
11/29/93              600         17.250      16.500     16.500
11/30/93              900         17.250      16.250     16.250
12/01/93              100         16.250      16.250     16.250
12/02/93             2800         16.500      16.250     16.250
12/03/93             6500         16.875      16.750     16.750
12/06/93              600         17.250      16.500     16.875
12/07/93             3800         17.250      16.250     17.250
12/08/93              500         17.250      16.250     16.250
12/09/93             2000         16.250      16.250     16.250
12/10/93             2400         17.250      16.250     17.250
12/13/93              800         17.250      16.250     17.250
12/14/93              700         16.750      16.250     16.250
12/15/93            24800         17.250      16.500     17.250
12/16/93            63300         19.000      17.000     18.000
12/17/93             7700         18.500      18.000     18.000
12/20/93            11200         18.500      17.750     18.250
12/21/93            13100         17.750      17.000     17.500
12/22/93             4300         17.125      16.500     17.125
12/23/93             1900         17.000      16.750     16.750
12/24/93             #N/A         17.000      16.750     16.750
12/27/93            30300         18.500      16.750     18.250
12/28/93              500         18.500      17.750     17.750
12/29/93             3100         18.500      17.750     17.750
12/30/93             1900         18.500      17.750     18.500
12/31/93             4200         18.500      17.750     17.750
01/03/94             2900         18.500      17.750     18.500
01/04/94             1500         18.500      17.750     18.500
01/05/94              600         18.000      18.000     18.000
01/06/94             5300         18.125      17.750     18.125
01/07/94             5400         18.500      18.000     18.000
01/10/94              600         18.500      18.000     18.500
01/11/94             6000         18.375      18.000     18.000
01/12/94              200         18.000      18.000     18.000
01/13/94            10100         19.250      18.750     19.000
01/14/94             2100         19.500      18.500     19.500
01/17/94            21400         19.500      18.750     19.500
01/18/94             6100         19.750      18.750     19.750
01/19/94              500         18.750      18.750     18.750
01/20/94              200         19.750      18.750     19.750
01/21/94             3800         19.750      19.000     19.000
01/24/94             1200         19.750      19.000     19.000
01/25/94              300         20.000      19.250     19.250
01/26/94             1800         19.500      19.250     19.250
01/27/94              300         19.500      19.250     19.250
01/28/94             1300         19.250      19.250     19.250
01/31/94             2400         19.750      19.500     19.750
02/01/94             7500         20.750      20.000     20.750
02/02/94            14400         20.750      20.000     20.625
02/03/94            19400         20.750      20.000     20.500
02/04/94             3400         20.750      20.000     20.000
02/07/94            11200         20.000      19.750     20.000
02/08/94            24500         20.250      20.000     20.000
02/09/94             8500         20.000      20.000     20.000
02/10/94             5200         20.250      19.750     20.250
02/11/94              400         19.875      19.750     19.750
02/14/94             3300         20.250      19.750     19.750
02/15/94              500         19.750      19.750     19.750
02/16/94             7100         19.875      19.750     19.875
02/17/94              500         19.750      19.750     19.750
02/18/94             1800         20.250      19.750     19.750
02/21/94             #N/A         20.250      19.750     19.750
02/22/94              100         20.250      20.250     20.250
02/23/94             1900         20.250      19.750     19.875
02/24/94             2900         20.250      19.750     19.750
02/25/94             1100         19.750      19.250     19.250
02/28/94             2800         20.000      19.250     19.250
03/01/94                0         20.000      19.250     19.250
03/02/94             3100         19.250      19.250     19.250
03/03/94             1100         19.250      19.250     19.250
03/04/94             5200         20.000      19.000     19.000
03/07/94              300         19.000      19.000     19.000
03/08/94              300         19.000      19.000     19.000
03/09/94             4200         19.000      19.000     19.000
03/10/94             1700         19.250      18.875     19.250
03/11/94              300         18.750      18.750     18.750
03/14/94             3800         19.000      19.000     19.000
03/15/94                0         19.250      18.750     18.750
03/16/94              500         19.250      18.750     19.250
03/17/94             2400         19.250      18.750     18.750
03/18/94             1000         19.750      18.750     19.750
03/21/94             2500         19.250      19.000     19.250
03/22/94             1800         19.500      19.500     19.500
03/23/94             5500         19.500      19.125     19.125
03/24/94                0         19.500      19.000     19.000
03/25/94                0         19.250      18.500     18.500
03/28/94                0         19.250      18.500     18.500
03/29/94              300         18.250      18.000     18.000
03/30/94             6100         18.000      17.625     17.625
03/31/94            18400         18.000      16.750     17.000
04/01/94             #N/A         18.000      16.750     17.000
04/04/94             9600         16.750      16.000     16.750
04/05/94                0         17.250      16.250     16.250
04/06/94              300         17.250      17.250     17.250
04/07/94             1700         17.250      16.438     16.438
04/08/94                0         17.250      16.250     16.250
04/11/94                0         17.250      16.250     16.250
04/12/94              900         17.250      16.250     17.250
04/13/94             4000         16.750      16.000     16.000
04/14/94             1300         16.500      15.500     16.250
04/15/94             2200         15.500      15.500     15.500
04/18/94             1800         16.000      15.500     15.500
04/19/94            23500         15.750      14.250     14.250
04/20/94            20400         14.000      12.000     12.500
04/21/94            37300         13.500      12.250     13.250
04/22/94             3700         14.250      13.750     14.250
04/25/94             2500         14.250      13.500     14.063
04/26/94             1700         14.500      14.250     14.500
04/27/94             #N/A         14.500      14.250     14.500
04/28/94             9200         13.750      13.250     13.688
04/29/94             1500         13.750      13.000     13.000
05/02/94              100         13.750      13.750     13.750
05/03/94             3000         13.500      12.750     13.250
05/04/94             1600         13.250      12.500     13.250
05/05/94             5400         13.250      12.875     13.250
05/06/94             3100         13.250      12.875     13.000
05/09/94            10000         12.750      12.500     12.500
05/10/94             1900         12.500      12.250     12.250
05/11/94             1000         13.000      12.313     13.000
05/12/94              200         13.000      12.250     12.250
05/13/94             1700         13.000      12.250     12.250
05/16/94             7400         13.750      13.000     13.000
05/17/94            30400         15.500      13.000     14.438
05/18/94             4500         14.625      14.000     14.563
05/19/94              500         15.000      14.000     14.750
05/20/94              100         15.000      15.000     15.000
05/23/94             9000         15.000      14.000     15.000
05/24/94             7700         15.000      14.000     14.500
05/25/94                0         15.000      14.250     14.250
05/26/94            12500         15.000      14.250     15.000
05/27/94             1900         14.250      14.250     14.250
05/30/94             #N/A         14.250      14.250     14.250
05/31/94              300         14.750      13.750     13.750
06/01/94              900         14.750      13.750     14.750
06/02/94                0         14.750      13.750     13.750
06/03/94              500         13.750      13.750     13.750
06/06/94             9400         15.000      14.250     15.000
06/07/94             1200         15.500      14.750     14.750
06/08/94              300         14.750      14.750     14.750
06/09/94            36700         16.250      15.000     16.250
06/10/94             1000         16.250      16.250     16.250
06/13/94                0         16.250      15.250     15.250
06/14/94             7500         16.500      15.250     16.250
06/15/94              900         16.000      16.000     16.000
06/16/94              100         16.000      16.000     16.000
06/17/94              300         17.000      17.000     17.000
06/20/94             1000         16.750      16.000     16.000
06/21/94             4700         16.750      16.375     16.375
06/22/94             2300         16.500      16.250     16.375
06/23/94             2100         16.375      16.000     16.000
06/24/94             2000         16.750      16.000     16.375
06/27/94             6500         17.500      16.000     17.500
06/28/94             3700         18.250      17.000     18.250
06/29/94             1200         18.250      17.000     17.000
06/30/94             6200         18.250      17.063     18.250
07/01/94                0         18.250      17.000     17.000
07/04/94             #N/A         18.250      17.000     17.000
07/05/94             5000         18.250      18.250     18.250
07/06/94            12000         19.000      17.750     17.750
07/07/94              600         19.000      17.750     19.000
07/08/94             3600         19.000      18.000     19.000
07/11/94             5900         19.750      18.500     19.750
07/12/94             7800         19.500      18.500     19.500
07/13/94                0         19.500      18.500     18.500
07/14/94              500         19.500      18.500     19.250
07/15/94              400         18.500      18.500     18.500
07/18/94             4100         19.500      18.813     18.813
07/19/94              400         18.875      18.500     18.875
07/20/94             4600         19.500      18.500     19.375
07/21/94             1400         19.000      19.000     19.000
07/22/94                0         19.500      18.500     18.500
07/25/94              500         18.500      18.500     18.500
07/26/94             8700         19.000      18.750     18.750
07/27/94             4200         19.250      18.500     19.250
07/28/94              400         18.500      18.500     18.500
07/29/94              600         19.000      18.500     19.000
08/01/94             3700         19.500      18.500     19.250
08/02/94             5000         18.750      18.500     18.750
08/03/94             2400         19.250      18.750     19.125
08/04/94            15300         20.250      19.250     20.000
08/05/94              600         20.000      19.250     19.250
08/08/94              400         20.000      19.750     19.750
08/09/94              200         19.250      19.250     19.250
08/10/94            23600         20.000      18.750     19.375
08/11/94             6100         19.000      18.750     18.750
08/12/94                0         19.250      18.250     18.250
08/15/94             3900         19.250      18.250     19.250
08/16/94             2400         19.250      18.750     18.750
08/17/94                0         19.250      18.250     18.250
08/18/94             2000         19.250      18.750     18.750
08/19/94              600         19.250      18.250     18.250
08/22/94              100         18.250      18.250     18.250
08/23/94            23200         19.750      19.000     19.250
08/24/94             6100         19.000      19.000     19.000
08/25/94            18100         19.500      19.000     19.000
08/26/94             2100         19.750      18.750     18.750
08/29/94              200         19.250      19.250     19.250
08/30/94             8100         19.375      18.750     19.375
08/31/94             3700         19.250      18.750     18.750
09/01/94                0         19.750      18.250     18.250
09/02/94             4000         18.250      18.250     18.250
09/05/94             #N/A         18.250      18.250     18.250
09/06/94             1800         18.250      18.250     18.250
09/07/94                0         19.500      18.250     18.250
09/08/94              200         18.250      18.250     18.250
09/09/94                0         19.500      18.250     18.250
09/12/94             1000         18.250      18.250     18.250
09/13/94             2700         18.750      18.250     18.750
09/14/94                0         18.750      18.250     18.250
09/15/94             1500         18.750      18.750     18.750
09/16/94            23500         18.750      18.375     18.750
09/19/94             1700         18.250      18.250     18.250
09/20/94             1600         18.375      18.250     18.375
09/21/94              100         18.250      18.250     18.250
09/22/94             2700         18.375      18.250     18.250
09/23/94              300         18.250      18.250     18.250
09/26/94             4800         18.375      17.750     17.750
09/27/94             1200         17.750      17.750     17.750
09/28/94             3900         18.000      17.875     18.000
09/29/94            21500         17.250      17.250     17.250
09/30/94              500         17.750      17.750     17.750
10/03/94             3100         18.000      17.250     17.250
10/04/94             2200         17.250      16.500     16.500
10/05/94             2000         16.750      16.750     16.750
10/06/94              200         16.750      16.750     16.750
10/07/94             5000         16.750      16.750     16.750
10/10/94             4000         17.250      16.750     17.250
10/11/94             1000         17.000      17.000     17.000
10/12/94              100         16.750      16.750     16.750
10/13/94              400         17.250      17.000     17.000
10/14/94             1800         17.250      16.750     17.000
10/17/94              800         17.500      17.000     17.125
10/18/94             1500         17.500      17.000     17.000
10/19/94                0         17.500      17.000     17.000
10/20/94             2400         17.000      16.250     16.250
10/21/94             5000         17.000      16.250     16.250
10/24/94             3000         16.500      16.250     16.500
10/25/94             4700         17.000      15.500     15.500
10/26/94              200         16.000      15.250     15.250
10/27/94              400         16.000      15.250     15.250
10/28/94                0         16.000      15.250     15.250
10/31/94             1700         16.000      15.375     15.375
11/01/94              800         16.000      15.250     16.000
11/02/94              400         16.000      15.250     16.000
11/03/94            19500         15.750      13.000     13.250
11/04/94             4000         13.500      13.000     13.500
11/07/94            24100         14.000      12.750     13.500
11/08/94             3300         14.125      13.250     13.250
11/09/94             3700         14.250      13.000     13.000
11/10/94             1500         13.000      13.000     13.000
11/11/94             5900         13.250      12.250     13.000
11/14/94             4800         13.250      12.500     12.500
11/15/94            18400         12.500      11.750     12.250
11/16/94            19200         13.750      11.750     13.750
11/17/94             2400         13.750      13.000     13.000
11/18/94             8500         15.500      13.500     14.750
11/21/94            20300         17.250      15.500     17.250
11/22/94             2500         17.250      15.750     15.750
11/23/94             4300         16.250      15.500     15.500
11/24/94             #N/A         16.250      15.500     15.500
11/25/94              300         15.500      15.500     15.500
11/28/94             8700         15.750      15.000     15.125
11/29/94             2800         16.000      15.000     15.125
11/30/94            10200         16.500      15.250     16.500
12/01/94             8000         18.125      16.500     17.250
12/02/94            17100         19.750      18.250     19.250
12/05/94            26500         19.750      18.500     19.125
12/06/94            17200         19.750      17.750     17.750
12/07/94             1400         18.750      17.750     17.750
12/08/94             1000         18.750      18.000     18.000
12/09/94             8100         18.750      17.813     18.750
12/12/94             1100         19.250      18.000     18.625
12/13/94            10000         19.250      17.000     17.250
12/14/94             3800         17.250      16.750     16.750
12/15/94              900         17.500      16.750     16.875
12/16/94              800         17.500      17.000     17.000
12/19/94            27000         17.250      16.813     17.125
12/20/94             3200         17.500      16.750     17.250
12/21/94            59800         17.250      16.750     17.000
12/22/94             5200         17.500      17.000     17.125
12/23/94            77900         17.500      17.000     17.125
12/26/94             #N/A         17.500      17.000     17.125
12/27/94            77100         17.500      17.125     17.375
12/28/94              200         17.063      17.000     17.000
12/29/94            45700         17.375      17.000     17.375
12/30/94             1800         17.500      17.000     17.500
01/02/95             #N/A         17.500      17.000     17.500
01/03/95            36700         17.500      17.000     17.250
01/04/95             7600         17.500      17.250     17.250
01/05/95            25000         17.500      17.000     17.000
01/06/95             7300         17.500      17.000     17.000
01/09/95             2000         17.250      17.000     17.000
01/10/95              100         17.500      17.500     17.500
01/11/95              600         17.375      17.125     17.375
01/12/95            17700         17.250      16.000     16.500
01/13/95              100         17.000      17.000     17.000
01/16/95              200         16.000      15.813     15.813
01/17/95              500         15.750      15.750     15.750
01/18/95                0         17.000      15.750     15.750
01/19/95             2200         17.000      16.000     17.000
01/20/95             3700         16.500      15.750     16.500
01/23/95             1200         16.250      16.000     16.250
01/24/95              200         16.750      16.750     16.750
01/25/95             1600         16.500      15.750     16.500
01/26/95                0         16.750      15.750     15.750
01/27/95              100         15.750      15.750     15.750
01/30/95             1100         16.500      16.000     16.000
01/31/95            14500         17.500      16.250     17.125
02/01/95            51300         18.000      17.000     17.750
02/02/95             7300         18.500      17.000     17.625
02/03/95             2100         18.000      17.000     17.125
02/06/95             3700         17.250      17.000     17.000
02/07/95            10000         17.500      17.000     17.000
02/08/95                0         17.750      16.500     16.500
02/09/95             1600         17.750      17.000     17.000
02/10/95             3600         17.500      16.250     16.250
02/13/95             5200         16.500      16.000     16.500
02/14/95             7900         15.750      15.250     15.375
02/15/95              300         14.500      14.500     14.500
02/16/95             1800         16.000      15.500     15.500
02/17/95             6200         16.500      16.000     16.500
02/20/95             #N/A         16.500      16.000     16.500
02/21/95                0         16.500      15.750     15.750
02/22/95             1600         16.000      15.750     15.750
02/23/95                0         16.250      15.500     15.500
02/24/95             5600         16.000      15.000     16.000
02/27/95              300         15.000      15.000     15.000
02/28/95              800         16.000      15.500     15.500
03/01/95             1000         15.000      15.000     15.000
03/02/95             1000         16.000      16.000     16.000
03/03/95              500         16.000      15.000     15.500
03/06/95              600         16.000      15.000     15.000
03/07/95             9400         15.500      14.250     15.250
03/08/95              700         15.250      14.750     14.750
03/09/95             1300         15.000      14.500     14.500
03/10/95             1500         15.250      14.500     14.625
03/13/95             1600         14.750      14.125     14.750
03/14/95             1200         14.375      13.500     14.375
03/15/95              700         14.750      13.500     14.125
03/16/95             2400         14.750      13.500     14.750
03/17/95                0         14.750      13.500     13.500
03/20/95              400         14.750      13.500     14.500
03/21/95                0         14.750      13.500     13.500
03/22/95              200         14.500      14.500     14.500
03/23/95                0         14.500      13.500     13.500
03/24/95              200         13.500      13.500     13.500
03/27/95             5200         14.500      13.875     14.500
03/28/95             3300         13.500      12.500     13.000
03/29/95            33000         13.750      12.250     12.500
03/30/95             1500         14.000      12.750     14.000
03/31/95             1000         14.250      14.250     14.250
04/03/95              400         14.000      13.500     14.000
04/04/95             1400         14.250      13.000     13.000
04/05/95             1500         13.500      13.000     13.500
04/06/95              400         14.250      13.000     13.000
04/07/95              100         13.000      13.000     13.000
04/10/95             3000         13.500      13.000     13.500
04/11/95              500         14.000      12.500     12.500
04/12/95             2600         14.000      12.500     13.000
04/13/95             1100         14.000      12.500     14.000
04/14/95             #N/A         14.000      12.500     14.000
04/17/95             1800         14.000      12.500     14.000
04/18/95                0         14.000      12.500     12.500
04/19/95                0         14.000      12.500     12.500
04/20/95              200         12.500      12.500     12.500
04/21/95                0         14.000      12.500     12.500
04/24/95                0         14.000      12.500     12.500
04/25/95              200         14.000      13.750     13.750
04/26/95                0         14.000      12.500     12.500
04/27/95                0         14.000      12.500     12.500
04/28/95             3800         14.000      13.500     14.000
05/01/95              400         14.000      12.500     12.500
05/02/95              200         12.500      12.500     12.500
05/03/95             2900         14.000      12.500     14.000
05/04/95                0         14.000      12.500     12.500
05/05/95                0         14.000      12.500     12.500
05/08/95                0         14.000      12.500     12.500
05/09/95                0         14.000      12.500     12.500
05/10/95             1100         13.500      12.500     13.500
05/11/95                0         14.000      12.500     12.500
05/12/95              300         12.500      12.500     12.500
05/15/95              600         13.500      12.500     13.500
05/16/95              600         12.625      12.500     12.625
05/17/95             2600         14.000      12.500     14.000
05/18/95                0         14.000      12.750     12.750
05/19/95              200         13.500      13.500     13.500
05/22/95             3300         14.000      13.000     14.000
05/23/95             3800         14.250      12.750     13.250
05/24/95              600         13.750      12.750     12.750
05/25/95                0         13.750      12.750     12.750
05/26/95             3000         12.625      12.250     12.250
05/29/95             #N/A         12.625      12.250     12.250
05/30/95              500         13.500      12.250     13.500
05/31/95              100         13.750      13.750     13.750
06/01/95             3600         13.750      12.250     13.250
06/02/95             1100         13.750      12.250     12.250
06/05/95             1000         13.750      13.250     13.750
06/06/95             3300         13.750      12.625     13.500
06/07/95             1500         13.500      12.250     12.250
06/08/95             3700         13.250      12.250     13.000
06/09/95              300         13.250      13.250     13.250
06/12/95              800         13.250      12.250     13.250
06/13/95             9300         14.250      12.250     14.250
06/14/95             2800         13.750      13.000     13.750
06/15/95             2100         14.250      13.250     14.250
06/16/95             4100         14.250      13.000     14.125
06/19/95             7800         13.750      12.750     13.500
06/20/95             1400         13.750      12.500     13.500
06/21/95            10300         12.750      11.750     12.625
06/22/95             7000         12.750      12.250     12.750
06/23/95             7000         14.000      13.000     14.000
06/26/95              400         13.500      13.250     13.500
06/27/95             7300         14.500      13.250     14.500
06/28/95             3600         14.125      13.250     14.125
06/29/95             2000         14.500      13.875     14.000
06/30/95             3000         14.500      13.250     14.500
07/03/95             1000         14.250      13.000     13.000
07/04/95             #N/A         14.250      13.000     13.000
07/05/95              900         14.250      14.000     14.000
07/06/95             4600         14.250      13.000     14.000
07/07/95                0         14.250      13.000     13.000
07/10/95             3200         14.250      13.000     13.000
07/11/95             5200         14.250      13.000     13.500
07/12/95             2500         14.250      13.000     14.250
07/13/95              200         14.250      14.250     14.250
07/14/95                0         14.250      12.750     12.750
07/17/95             3200         13.750      13.000     13.000
07/18/95              600         14.250      13.000     13.500
07/19/95              400         14.250      14.000     14.000
07/20/95              600         13.625      13.000     13.000
07/21/95              200         14.250      13.000     14.250
07/24/95             1400         13.375      13.375     13.375
07/25/95              800         14.250      13.000     13.500
07/26/95              500         13.250      13.000     13.000
07/27/95                0         14.250      12.750     12.750
07/28/95              600         13.000      13.000     13.000
07/31/95                0         14.250      13.000     13.000
08/01/95              700         13.500      13.500     13.500
08/02/95              600         14.250      13.000     13.000
08/03/95              600         14.250      14.125     14.125
08/04/95             3100         13.625      13.250     13.625
08/07/95                0         14.250      13.250     13.250
08/08/95             8000         14.250      13.250     13.250
08/09/95             2900         13.500      13.000     13.000
08/10/95             2000         13.250      13.000     13.000
08/11/95             1800         13.500      13.000     13.000
08/14/95             6200         13.500      12.750     13.125
08/15/95             1700         13.500      13.000     13.125
08/16/95             7000         13.500      12.750     12.750
08/17/95             8100         13.250      12.250     12.500
08/18/95             1300         12.250      12.250     12.250
08/21/95             4700         13.500      12.250     13.500
08/22/95             3300         13.500      12.750     13.500
08/23/95              200         12.250      12.250     12.250
08/24/95             1200         13.250      12.250     13.000
08/25/95              800         13.500      13.000     13.000
08/28/95            27600         13.250      11.750     11.750
08/29/95                0         13.000      11.750     11.750
08/30/95              900         13.000      11.750     13.000
08/31/95              500         13.000      13.000     13.000
09/01/95                0         13.250      12.000     12.000
09/04/95             #N/A         13.250      12.000     12.000
09/05/95              400         13.250      12.375     13.250
09/06/95              200         13.250      13.250     13.250
09/07/95             1600         12.750      12.000     12.000
09/08/95              100         13.250      13.250     13.250
09/11/95             5400         13.250      12.000     12.250
09/12/95             2700         12.500      12.000     12.500
09/13/95             4500         13.250      13.000     13.000
09/14/95             1700         13.000      13.000     13.000
09/15/95             3700         13.000      12.000     13.000
09/18/95            20100         13.750      12.500     13.625
09/19/95              300         13.000      13.000     13.000
09/20/95             4300         13.188      13.000     13.000
09/21/95            16200         14.000      13.500     14.000
09/22/95             2400         14.250      13.000     13.000
09/25/95             1000         14.000      13.500     13.500
09/26/95             1000         13.500      13.500     13.500
09/27/95                0         13.500      12.750     12.750
09/28/95             1400         13.500      13.500     13.500
09/29/95             1800         13.500      12.875     13.500
10/02/95            12300         14.500      13.500     13.750
10/03/95            13300         15.000      14.000     14.750
10/04/95             8800         15.000      14.000     14.750
10/05/95              500         14.250      14.000     14.250
10/06/95              600         14.750      14.250     14.750
10/09/95              100         14.750      14.750     14.750
10/10/95             3400         14.625      14.000     14.625
10/11/95             5400         14.000      13.813     13.938
10/12/95             1900         14.375      13.563     14.375
10/13/95             1500         14.375      13.500     14.000
10/16/95              500         13.500      13.500     13.500
10/17/95              300         14.250      14.250     14.250
10/18/95             4700         14.000      13.375     14.000
10/19/95             6300         14.125      13.875     14.000
10/20/95                0         14.500      13.625     13.625
10/23/95             2600         14.500      13.625     13.875
10/24/95             2600         13.875      13.625     13.625
10/25/95              400         13.625      13.625     13.625
10/26/95             1000         14.500      14.125     14.500
10/27/95             3500         14.500      13.625     14.000
10/30/95             3700         13.625      13.625     13.625
10/31/95             1100         14.000      13.625     14.000
11/01/95             6500         14.750      14.000     14.500
11/02/95             2500         14.750      14.750     14.750
11/03/95             5100         15.750      15.000     15.000
11/06/95             4300         15.750      15.000     15.125
11/07/95             3200         15.500      14.500     15.500
11/08/95                0         15.500      14.500     14.500
11/09/95                0         15.500      14.500     14.500
11/10/95             2000         15.250      15.000     15.000
11/13/95             1700         15.750      15.500     15.750
11/14/95             1000         15.500      15.500     15.500
11/15/95                0         16.000      15.000     15.000
11/16/95             1200         15.750      15.000     15.000
11/17/95             3700         15.750      15.000     15.750
11/20/95              700         16.000      15.000     16.000
11/21/95              900         15.000      15.000     15.000
11/22/95             1700         15.750      15.000     15.750
11/23/95             #N/A         15.750      15.000     15.750
11/24/95             6800         15.438      15.000     15.000
11/27/95             5900         15.000      15.000     15.000
11/28/95             5600         15.250      15.000     15.250
11/29/95            17300         15.000      14.250     14.250
11/30/95             8200         14.750      14.250     14.750
12/01/95             7800         14.750      14.250     14.250
12/04/95              500         15.000      15.000     15.000
12/05/95             2000         15.250      14.250     14.750
12/06/95             6000         16.375      14.750     16.375
12/07/95             2500         16.375      15.500     15.500
12/08/95              200         14.750      14.750     14.750
12/11/95              900         14.750      14.750     14.750
12/12/95             2000         15.000      15.000     15.000
12/13/95             3400         15.438      15.000     15.250
12/14/95              800         15.875      15.500     15.500
12/15/95             2100         15.500      14.750     15.500
12/18/95                0         15.500      14.750     14.750
12/19/95             1500         14.750      14.750     14.750
12/20/95            10000         15.125      14.750     15.125
12/21/95              600         15.375      15.000     15.375
12/22/95             5400         16.000      14.750     16.000
12/25/95             #N/A         16.000      14.750     16.000
12/26/95             2600         16.000      15.000     15.000
12/27/95             2100         16.000      15.000     16.000
12/28/95             3000         15.250      14.875     15.250
12/29/95             2800         16.000      15.000     15.000
01/01/96             #N/A         16.000      15.000     15.000
01/02/96             3300         16.000      15.000     16.000
01/03/96             9300         16.250      15.500     15.500
01/04/96             1400         16.250      15.500     15.875
01/05/96             8300         16.750      15.500     16.750
01/08/96             2900         15.500      15.500     15.500
01/09/96             4400         15.625      15.000     15.000
01/10/96             2500         15.250      14.250     14.250
01/11/96             1400         14.500      14.500     14.500
01/12/96             1000         15.500      15.500     15.500
01/15/96            11700         15.500      14.500     15.000
01/16/96              500         14.500      14.500     14.500
01/17/96             5100         15.500      14.500     15.500
01/18/96                0         15.500      14.250     14.250
01/19/96             1000         15.500      15.000     15.000
01/22/96             3400         14.750      14.250     14.500
01/23/96              600         14.250      14.250     14.250
01/24/96              300         15.000      15.000     15.000
01/25/96             3500         14.625      14.250     14.250
01/26/96             9300         14.750      13.500     14.000
01/29/96             6800         14.250      12.750     12.750
01/30/96            15800         14.750      13.250     14.500
01/31/96                0         14.750      14.000     14.000
02/01/96             3500         14.750      14.500     14.500
02/02/96              300         14.000      14.000     14.000
02/05/96                0         15.000      14.000     14.000
02/06/96             8500         15.000      14.000     14.500
02/07/96                0         15.000      14.000     14.000
02/08/96             7800         15.500      14.000     15.250
02/09/96              300         14.500      14.500     14.500
02/12/96                0         16.000      14.500     14.500
02/13/96              300         16.000      14.500     14.500
02/14/96              100         14.500      14.500     14.500
02/15/96             3900         15.000      14.000     15.000
02/16/96             1900         14.000      13.750     13.750
02/19/96             #N/A         14.000      13.750     13.750
02/20/96             2400         14.125      14.000     14.125
02/21/96             2000         13.625      13.625     13.625
02/22/96                0         14.750      13.500     13.500
02/23/96             4700         14.750      13.500     14.750
02/26/96             3200         13.500      13.500     13.500
02/27/96              200         14.000      13.500     14.000
02/28/96                0         14.500      13.750     13.750
02/29/96             1700         14.750      13.750     14.750
03/01/96             2200         13.750      13.750     13.750
03/04/96             2300         14.000      13.250     13.250
03/05/96              500         13.250      13.250     13.250
03/06/96              600         14.000      13.250     14.000
03/07/96             3300         13.250      13.250     13.250
03/08/96             2200         14.000      13.250     13.250
03/11/96              200         13.250      13.250     13.250
03/12/96                0         14.000      13.250     13.250
03/13/96                0         14.000      13.250     13.250
03/14/96                0         14.000      13.250     13.250
03/15/96             4800         13.250      12.500     12.500
03/18/96             1800         12.875      12.500     12.500
03/19/96             2000         13.250      12.500     12.500
03/20/96             1000         12.875      12.625     12.875
03/21/96             8500         13.500      12.750     12.750
03/22/96             5800         13.500      13.375     13.375
03/25/96              700         13.500      13.250     13.250
03/26/96             7100         13.000      13.000     13.000
03/27/96            10400         13.500      13.000     13.125
03/28/96             3900         12.500      12.500     12.500
03/29/96             4000         14.000      12.500     13.500
04/01/96             3800         13.500      13.000     13.000
04/02/96            11000         12.750      12.500     12.750
04/03/96             2500         13.000      12.250     12.500
04/04/96             2000         12.750      12.250     12.750
04/05/96             #N/A         12.750      12.250     12.750
04/08/96              600         12.250      12.250     12.250
04/09/96             4200         12.500      12.250     12.375
04/10/96             5500         12.250      12.000     12.000
04/11/96             3100         12.000      12.000     12.000
04/12/96             1100         12.000      12.000     12.000
04/15/96                0         12.750      12.000     12.000
04/16/96                0         13.000      12.250     12.250
04/17/96              600         13.000      12.250     12.250
04/18/96              200         13.000      12.500     12.500
04/19/96             1700         13.000      12.250     12.500
04/22/96             8000         12.750      12.625     12.625
04/23/96            11800         13.000      12.625     12.750
04/24/96             2700         13.000      12.750     12.875
04/25/96              600         12.750      12.750     12.750
04/26/96             2000         12.250      12.250     12.250
04/29/96              200         12.250      12.250     12.250
04/30/96             1700         12.750      12.250     12.250
05/01/96              300         13.250      12.250     13.250
05/02/96             1100         13.250      13.000     13.000
05/03/96              300         12.500      12.500     12.500
05/06/96             4900         13.500      12.500     12.750
05/07/96                0         13.125      12.250     12.250
05/08/96              900         12.500      12.250     12.500
05/09/96             3800         12.750      12.500     12.500
05/10/96             5900         12.625      12.625     12.625
05/13/96              600         12.750      12.750     12.750
05/14/96             1500         13.250      12.500     13.250
05/15/96            33400         12.875      12.500     12.500
05/16/96            10700         12.875      12.250     12.250
05/17/96             8700         12.500      11.750     12.000
05/20/96             7600         11.875      11.375     11.500
05/21/96             2000         11.500      11.500     11.500
05/22/96             5800         11.500      11.000     11.000
05/23/96            19500         11.000      10.750     11.000
05/24/96           300800         20.500      18.250     18.625
05/27/96             #N/A         20.500      18.250     18.625
05/28/96           194300         18.000      17.000     17.250
05/29/96            29100         17.875      17.250     17.250
05/30/96            30600         17.875      17.250     17.500
05/31/96             9400         17.875      17.375     17.500
06/03/96            12400         17.875      17.500     17.750
06/04/96            19100         18.125      17.625     17.750
06/05/96             5600         17.875      17.750     17.750
06/06/96             4200         18.125      17.750     17.750
06/07/96            42100         17.750      17.375     17.563
06/10/96             1500         17.563      17.500     17.500
06/11/96            16300         18.000      17.625     17.875
06/12/96            25400         18.000      17.625     18.000
06/13/96              600         18.125      17.625     17.625
06/14/96            10000         18.125      17.750     17.813
06/17/96             3300         17.813      17.750     17.750
06/18/96             6800         18.125      17.750     17.750
06/19/96             5200         17.813      17.750     17.750
06/20/96             3000         17.875      17.625     17.875
06/21/96             9300         18.125      17.625     17.750
06/24/96             3800         17.938      17.750     17.750
06/25/96             2700         17.781      17.750     17.781
06/26/96             6200         17.813      17.750     17.813
06/27/96              400         17.625      17.625     17.625
06/28/96             4100         18.000      17.625     18.000
07/01/96              400         17.750      17.625     17.625
07/02/96             7500         18.000      17.625     17.813
07/03/96              200         17.750      17.750     17.750
07/04/96             #N/A         17.750      17.750     17.750
07/05/96             7100         17.625      17.500     17.625
07/08/96             1700         17.625      17.375     17.375
07/09/96            22800         17.625      17.500     17.625
07/10/96            11600         17.875      17.500     17.500
07/11/96             6900         17.500      17.375     17.375
07/12/96             4900         17.438      17.375     17.438
07/15/96             8500         17.750      17.375     17.750
07/16/96             4600         17.375      17.250     17.250
07/17/96            18800         17.750      17.250     17.375
07/18/96             9500         17.500      17.375     17.500
07/19/96             1300         17.375      17.375     17.375
07/22/96             5000         17.875      17.375     17.875
07/23/96             7000         17.875      17.375     17.625
07/24/96            15500         17.875      17.375     17.500
07/25/96             3500         17.563      17.375     17.563
07/26/96            10300         17.750      17.250     17.750
07/29/96              100         17.375      17.375     17.375
07/30/96              600         17.563      17.563     17.563
07/31/96             4400         17.500      17.375     17.500
08/01/96              600         17.750      17.500     17.500
08/02/96             2000         17.375      17.375     17.375
08/05/96             3100         17.469      17.375     17.469
08/06/96             5000         17.500      17.500     17.500
08/07/96            32400         17.250      14.750     16.500
08/08/96             5400         16.500      16.000     16.000
08/09/96              100         16.000      16.000     16.000
08/12/96                0         17.000      16.000     16.000
08/13/96            11300         16.000      15.000     15.250
08/14/96             9100         15.500      14.500     15.000
08/15/96            18200         15.500      15.063     15.438
08/16/96             1800         15.875      15.250     15.250
08/19/96             1000         15.125      15.125     15.125
08/20/96             4400         15.125      15.000     15.000
08/21/96             2400         15.750      14.500     15.000
08/22/96             3400         15.500      15.000     15.375
08/23/96            11400         15.750      15.375     15.625
08/26/96             1000         15.500      15.500     15.500
08/27/96             3100         15.563      15.375     15.563
08/28/96             4900         16.000      15.375     15.688
08/29/96             3100         15.563      15.375     15.563
08/30/96             3100         15.688      15.375     15.500
09/02/96             #N/A         15.688      15.375     15.500
09/03/96             5400         16.000      15.375     15.375
09/04/96             3200         15.563      15.375     15.563
09/05/96             5500         15.750      15.375     15.750
09/06/96             5500         15.750      15.625     15.750
09/09/96            35400         15.750      15.375     15.625
09/10/96             5800         15.750      15.375     15.625
09/11/96             7300         16.000      15.375     15.625
09/12/96             3100         16.000      15.375     15.625
09/13/96                0         16.000      15.375     15.375
09/16/96             4500         15.625      15.375     15.625
09/17/96             5000         15.625      15.500     15.625
09/18/96                0         16.000      15.375     15.375
09/19/96             1400         15.625      15.375     15.625
09/20/96             4900         15.750      15.375     15.625
09/23/96                0         16.000      15.375     15.375
09/24/96             4300         15.500      15.375     15.500
09/25/96             2200         15.625      15.375     15.625
09/26/96             5000         15.750      15.375     15.375
09/27/96              400         15.625      15.375     15.625
09/30/96              300         15.500      15.375     15.500
10/01/96             1100         15.750      15.500     15.750
10/02/96            70200         16.500      15.750     16.500
10/03/96            78900         16.500      15.938     16.500
10/04/96             6500         15.875      15.875     15.875
10/07/96             7000         15.875      15.875     15.875
10/08/96            15200         16.000      15.500     15.938
10/09/96             9300         16.063      15.500     16.063
10/10/96            78400         16.500      16.000     16.000
10/11/96             2900         16.250      16.000     16.250
10/14/96             5800         16.500      16.000     16.000
10/15/96            28100         16.375      16.000     16.000
10/16/96            28200         16.375      16.250     16.375
10/17/96             2000         16.250      16.000     16.250
10/18/96             3400         16.375      16.000     16.375
10/21/96             4500         16.625      16.125     16.500
10/22/96             3300         16.375      16.125     16.375
10/23/96             4700         16.625      16.125     16.125
10/24/96             7600         16.375      16.125     16.375
10/25/96             1500         16.500      16.250     16.500
10/28/96             8400         16.375      16.000     16.000
10/29/96           128800         15.250      12.750     14.250
10/30/96            46500         14.625      13.875     14.625
10/31/96            26100         16.250      14.375     14.875
11/01/96             2600         15.250      14.250     14.750
11/04/96             2000         15.250      14.250     15.000
11/05/96              300         14.750      14.750     14.750
11/06/96             2800         14.500      14.250     14.500
11/07/96             1300         15.000      14.500     15.000
11/08/96             2100         15.000      15.000     15.000
11/11/96            26100         15.250      14.375     14.563
11/12/96             3300         14.625      14.250     14.250
11/13/96             3200         15.125      14.250     14.750
11/14/96             3100         14.750      14.500     14.750
11/15/96             5100         15.125      14.500     15.125
11/18/96              600         14.500      14.500     14.500
11/19/96              200         15.250      14.500     14.500
11/20/96             3500         14.875      14.500     14.875
11/21/96              600         14.625      14.625     14.625
11/22/96              500         15.250      15.125     15.125
11/25/96              600         15.250      14.625     14.625
11/26/96             3200         15.250      14.625     15.250
11/27/96              600         15.125      15.125     15.125
11/28/96             #N/A         15.125      15.125     15.125
11/29/96              700         14.875      14.500     14.875
12/02/96             1200         15.125      14.500     15.125
12/03/96             5300         15.125      14.500     15.000
12/04/96            30400         15.125      14.500     14.500
12/05/96             1900         15.125      14.375     14.375
12/06/96            11800         14.500      14.125     14.250
12/09/96            12300         14.625      14.000     14.000
12/10/96           138900         17.500      14.375     15.375
12/11/96            62200         16.250      14.500     14.563
12/12/96             7000         15.250      14.000     14.125
12/13/96             1500         15.125      15.125     15.125
12/16/96              900         15.000      14.500     15.000
12/17/96            11400         15.000      14.000     14.375
12/18/96             1200         14.500      14.000     14.000
12/19/96             8900         15.625      14.500     15.500
12/20/96            11100         15.750      15.000     15.438
12/23/96            27900         15.750      15.000     15.000
12/24/96             2100         15.375      15.000     15.000
12/25/96             #N/A         15.375      15.000     15.000
12/26/96            13200         15.625      15.250     15.625
12/27/96             1000         15.625      15.250     15.625
12/30/96             6800         16.125      15.000     15.000
12/31/96             2100         15.250      14.625     15.250
01/03/97            11500         16.125      14.625     15.063


                                       3
<PAGE>

Stock Price and Volume History
================================================================================

Sprint Share Price and Event History

8/7/91 (IPO) to 1/3/97

[The following table was represented as a line graph in the printed material.]


[Line graph depicting stock price changes from IPO (8/7/91) through 1/3/97 with
callouts indicating the company's stock price at specific events in the
company's history.  The events are listed below]

Receives FDA approval for Phase I/II gene therapy trial 12/4/96

5 class action lawsuits to block Hurdle combination announced 6/6/96

Initiation of PI/II clinical trials for HSC announced 6/1/95

FDA approval granted for initiation of HSC clinical trials 12/2/94

Hurdle's tender offer closes. 2/19/92

President & CEO Linda Sonntag's resignation announced 10/20/94

Joint research agreement with Hurdle announced 6/19/92

Hurdle offer to purchase remaining 27% of Sprint announced 5/23/96

PI/II interim results of HSC transplantation announced 10/2/95

John Schwartz named President and CEO 3/30/95

Hurdle investment of $80 mm announced 3/28/95

Hurdle and Sprint funding of research at Stanford announced 5/20/94

Agreement with Centre Leon Berard, laying groundwork for clinical trials,
announced 9/1/93

Sprint downgraded by Merrill Lynch to below average after projecting
unprofitability through 1996 8/17/92

Hurdle acquisition of 60% of Sprint for $392mm announced 12/16/91

PI/II interim results of HSC testing announced 12/6/95


                                       4
<PAGE>

Stock Price and Volume History
================================================================================

Sprint vs. AMEX Biotechnology Index
8/7/91 (IPO) to 1/3/97

[The following table was represented as a line graph in the printed material.]

        Sprint        AMEX Biotech Index(a)   Comparable   Company Index(b)
        ------        ---------------------   ----------   ----------------
        1/2/95              100.0%              100.0%         100.0%
        1/3/95               98.6%               98.9%          95.8%
        1/4/95               98.6%               96.6%          99.5%
        1/5/95               97.1%               98.5%         100.6%
        1/6/95               97.1%               96.8%          97.3%
        1/9/95               97.1%               95.9%          99.3%
       1/10/95              100.0%               94.7%          96.3%
       1/11/95               99.3%               94.3%          93.8%
       1/12/95               94.3%               92.5%          93.7%
       1/13/95               97.1%               94.5%          96.9%
       1/16/95               90.4%               95.6%          98.7%
       1/17/95               90.0%               95.6%          99.7%
       1/18/95               90.0%               95.2%          97.8%
       1/19/95               97.1%               94.6%          97.2%
       1/20/95               94.3%               94.0%          96.7%
       1/23/95               92.9%               94.8%          95.6%
       1/24/95               95.7%               96.5%          94.0%
       1/25/95               94.3%               97.7%          94.4%
       1/26/95               90.0%              100.5%          94.8%
       1/27/95               90.0%              100.7%          96.3%
       1/30/95               91.4%               99.7%          95.4%
       1/31/95               97.9%              103.9%          96.8%
        2/1/95              101.4%              101.7%          96.3%
        2/2/95              100.7%              101.5%          99.4%
        2/3/95               97.9%              103.2%         104.3%
        2/6/95               97.1%              107.4%         102.6%
        2/7/95               97.1%              106.9%         102.7%
        2/8/95               94.3%              114.5%         104.5%
        2/9/95               97.1%              109.0%         105.1%
       2/10/95               92.9%              111.3%         106.9%
       2/13/95               94.3%              106.7%         105.2%
       2/14/95               87.9%              107.3%         105.9%
       2/15/95               82.9%              107.2%         108.1%
       2/16/95               88.6%              108.9%         105.0%
       2/17/95               94.3%              107.6%         101.5%
       2/20/95               94.3%              107.6%         101.5%
       2/21/95               90.0%              107.4%         102.4%
       2/22/95               90.0%              106.9%         102.6%
       2/23/95               88.6%              106.7%         102.8%
       2/24/95               91.4%              108.6%         104.1%
       2/27/95               85.7%              106.7%         103.1%
       2/28/95               88.6%              111.8%         100.9%
        3/1/95               85.7%              110.3%          99.6%
        3/2/95               91.4%              111.4%          98.8%
        3/3/95               88.6%              112.0%         101.1%
        3/6/95               85.7%              110.6%          99.7%
        3/7/95               87.1%              108.5%          97.6%
        3/8/95               84.3%              109.1%          94.7%
        3/9/95               82.9%              108.2%          96.5%
       3/10/95               83.6%              109.1%          94.6%
       3/13/95               84.3%              109.5%          92.7%
       3/14/95               82.1%              107.7%          94.7%
       3/15/95               80.7%              106.9%          87.3%
       3/16/95               84.3%              106.6%          89.5%
       3/17/95               77.1%              107.1%          90.4%
       3/20/95               82.9%              107.6%          90.1%
       3/21/95               77.1%              108.5%          89.7%
       3/22/95               82.9%              109.5%          88.6%
       3/23/95               77.1%              108.9%          88.2%
       3/24/95               77.1%              109.0%          87.0%
       3/27/95               82.9%              109.8%          86.4%
       3/28/95               74.3%              112.1%          88.5%
       3/29/95               71.4%              110.2%          90.1%
       3/30/95               80.0%              109.4%          93.9%
       3/31/95               81.4%              108.9%          96.7%
        4/3/95               80.0%              107.9%          89.2%
        4/4/95               74.3%              107.2%          89.7%
        4/5/95               77.1%              107.2%          88.2%
        4/6/95               74.3%              108.6%          85.0%
        4/7/95               74.3%              106.9%          85.6%
       4/10/95               77.1%              109.3%          87.4%
       4/11/95               71.4%              110.3%          87.7%
       4/12/95               74.3%              110.7%          91.6%
       4/13/95               80.0%              110.6%          94.1%
       4/14/95               80.0%              110.6%          94.1%
       4/17/95               80.0%              109.9%          93.3%
       4/18/95               71.4%              109.2%          90.2%
       4/19/95               71.4%              110.1%          90.4%
       4/20/95               71.4%              109.4%          88.4%
       4/21/95               71.4%              110.9%          90.8%
       4/24/95               71.4%              110.2%          92.5%
       4/25/95               78.6%              109.4%          90.7%
       4/26/95               71.4%              113.2%          91.1%
       4/27/95               71.4%              117.9%          91.5%
       4/28/95               80.0%              117.3%          90.9%
        5/1/95               71.4%              114.6%          95.6%
        5/2/95               71.4%              116.0%          95.1%
        5/3/95               80.0%              119.2%          94.8%
        5/4/95               71.4%              119.9%          90.4%
        5/5/95               71.4%              120.9%          90.3%
        5/8/95               71.4%              120.4%          89.8%
        5/9/95               71.4%              118.0%          86.6%
       5/10/95               77.1%              116.8%          91.3%
       5/11/95               71.4%              116.4%          93.4%
       5/12/95               71.4%              116.1%          94.3%
       5/15/95               77.1%              116.0%          94.3%
       5/16/95               72.1%              117.3%          92.1%
       5/17/95               80.0%              116.3%          92.9%
       5/18/95               72.9%              115.1%          94.7%
       5/19/95               77.1%              116.6%          92.6%
       5/22/95               80.0%              115.0%          92.2%
       5/23/95               75.7%              113.6%          94.2%
       5/24/95               72.9%              113.1%          94.3%
       5/25/95               72.9%              113.7%          94.1%
       5/26/95               70.0%              113.7%          91.7%
       5/29/95               70.0%              113.7%          91.7%
       5/30/95               77.1%              113.2%          90.7%
       5/31/95               78.6%              116.7%          91.9%
        6/1/95               75.7%              116.7%          94.1%
        6/2/95               70.0%              118.4%          94.0%
        6/5/95               78.6%              121.1%          95.9%
        6/6/95               77.1%              118.0%          95.3%
        6/7/95               70.0%              118.1%          95.6%
        6/8/95               74.3%              117.5%          95.9%
        6/9/95               75.7%              114.6%          95.0%
       6/12/95               75.7%              117.2%          95.4%
       6/13/95               81.4%              118.4%          94.7%
       6/14/95               78.6%              117.9%          95.4%
       6/15/95               81.4%              117.8%          94.9%
       6/16/95               80.7%              119.3%          95.8%
       6/19/95               77.1%              122.0%          96.6%
       6/20/95               77.1%              123.9%          98.2%
       6/21/95               72.1%              122.6%         108.4%
       6/22/95               72.9%              125.8%         103.7%
       6/23/95               80.0%              124.0%         105.4%
       6/26/95               77.1%              123.9%         105.9%
       6/27/95               82.9%              124.6%         107.2%
       6/28/95               80.7%              127.6%         108.0%
       6/29/95               80.0%              127.4%         113.4%
       6/30/95               82.9%              128.9%         117.9%
        7/3/95               74.3%              127.8%         119.9%
        7/4/95               74.3%              127.8%         119.9%
        7/5/95               80.0%              127.8%         120.2%
        7/6/95               80.0%              129.1%         118.0%
        7/7/95               74.3%              127.9%         115.4%
       7/10/95               74.3%              125.9%         116.0%
       7/11/95               77.1%              126.6%         120.4%
       7/12/95               81.4%              127.4%         125.0%
       7/13/95               81.4%              127.1%         121.1%
       7/14/95               72.9%              130.0%         122.1%
       7/17/95               74.3%              129.2%         120.7%
       7/18/95               77.1%              129.1%         119.4%
       7/19/95               80.0%              127.0%         113.6%
       7/20/95               74.3%              126.2%         114.7%
       7/21/95               81.4%              128.5%         120.7%
       7/24/95               76.4%              128.5%         125.6%
       7/25/95               77.1%              128.5%         122.8%
       7/26/95               74.3%              135.4%         122.3%
       7/27/95               72.9%              139.6%         117.1%
       7/28/95               74.3%              138.1%         113.8%
       7/31/95               74.3%              137.8%         121.1%
        8/1/95               77.1%              135.7%         123.1%
        8/2/95               74.3%              135.3%         120.2%
        8/3/95               80.7%              136.0%         125.6%
        8/4/95               77.9%              136.2%         126.7%
        8/7/95               75.7%              137.9%         126.2%
        8/8/95               75.7%              142.9%         123.0%
        8/9/95               74.3%              148.2%         134.3%
       8/10/95               74.3%              148.2%         135.5%
       8/11/95               74.3%              152.7%         135.4%
       8/14/95               75.0%              155.6%         135.2%
       8/15/95               75.0%              153.6%         136.6%
       8/16/95               72.9%              155.9%         135.8%
       8/17/95               71.4%              155.1%         136.4%
       8/18/95               70.0%              158.9%         136.2%
       8/21/95               77.1%              160.5%         137.4%
       8/22/95               77.1%              158.3%         137.3%
       8/23/95               70.0%              155.5%         143.3%
       8/24/95               74.3%              151.5%         142.9%
       8/25/95               74.3%              151.8%         142.6%
       8/28/95               67.1%              146.6%         138.7%
       8/29/95               67.1%              152.5%         133.7%
       8/30/95               74.3%              151.5%         136.4%
       8/31/95               74.3%              155.6%         140.2%
        9/1/95               68.6%              153.7%         139.6%
        9/4/95               68.6%              153.7%         139.6%
        9/5/95               75.7%              159.3%         137.9%
        9/6/95               75.7%              157.4%         136.7%
        9/7/95               68.6%              160.2%         136.6%
        9/8/95               75.7%              163.1%         134.8%
       9/11/95               70.0%              168.7%         135.7%
       9/12/95               71.4%              167.5%         140.2%
       9/13/95               74.3%              166.2%         144.9%
       9/14/95               74.3%              164.9%         145.0%
       9/15/95               74.3%              161.9%         138.9%
       9/18/95               77.9%              156.5%         137.1%
       9/19/95               74.3%              160.5%         140.8%
       9/20/95               74.3%              162.9%         142.0%
       9/21/95               80.0%              160.8%         139.1%
       9/22/95               74.3%              163.2%         133.5%
       9/25/95               77.1%              162.4%         131.5%
       9/26/95               77.1%              164.0%         127.5%
       9/27/95               72.9%              161.8%         123.4%
       9/28/95               77.1%              164.7%         127.7%
       9/29/95               77.1%              162.7%         129.6%
       10/2/95               78.6%              159.6%         129.5%
       10/3/95               84.3%              154.7%         117.7%
       10/4/95               84.3%              158.8%         120.0%
       10/5/95               81.4%              160.1%         121.6%
       10/6/95               84.3%              159.4%         123.7%
       10/9/95               84.3%              153.1%         118.5%
      10/10/95               83.6%              152.0%         121.3%
      10/11/95               79.6%              153.7%         119.4%
      10/12/95               82.1%              154.8%         123.6%
      10/13/95               80.0%              157.1%         123.3%
      10/16/95               77.1%              157.2%         127.6%
      10/17/95               81.4%              161.4%         126.3%
      10/18/95               80.0%              163.2%         129.7%
      10/19/95               80.0%              165.1%         124.3%
      10/20/95               77.9%              152.7%         125.1%
      10/23/95               79.3%              150.6%         123.0%
      10/24/95               77.9%              145.6%         124.0%
      10/25/95               77.9%              148.8%         125.4%
      10/26/95               82.9%              148.4%         118.7%
      10/27/95               80.0%              154.2%         118.7%
      10/30/95               77.9%              156.6%         117.8%
      10/31/95               80.0%              158.0%         113.1%
       11/1/95               82.9%              156.2%         107.1%
       11/2/95               84.3%              153.9%         105.5%
       11/3/95               85.7%              158.0%         107.7%
       11/6/95               86.4%              156.4%         109.8%
       11/7/95               88.6%              156.2%         109.3%
       11/8/95               82.9%              156.6%         105.7%
       11/9/95               82.9%              161.8%         110.8%
      11/10/95               85.7%              164.3%         111.7%
      11/13/95               90.0%              164.8%         108.5%
      11/14/95               88.6%              163.3%         106.1%
      11/15/95               85.7%              159.9%         116.2%
      11/16/95               85.7%              157.3%         117.9%
      11/17/95               90.0%              158.4%         117.0%
      11/20/95               91.4%              156.1%         114.7%
      11/21/95               85.7%              153.4%         114.6%
      11/22/95               90.0%              153.2%         113.1%
      11/23/95               90.0%              153.2%         113.1%
      11/24/95               85.7%              154.9%         115.7%
      11/27/95               85.7%              154.8%         116.2%
      11/28/95               87.1%              163.9%         114.2%
      11/29/95               81.4%              164.5%         116.4%
      11/30/95               84.3%              163.7%         114.6%
       12/1/95               81.4%              163.2%         115.0%
       12/4/95               85.7%              170.6%         118.9%
       12/5/95               84.3%              172.0%         124.4%
       12/6/95               93.6%              172.5%         120.8%
       12/7/95               88.6%              170.9%         120.6%
       12/8/95               84.3%              171.2%         119.3%
      12/11/95               84.3%              169.4%         118.9%
      12/12/95               85.7%              166.7%         122.2%
      12/13/95               87.1%              167.3%         119.5%
      12/14/95               88.6%              163.7%         115.3%
      12/15/95               88.6%              166.6%         118.6%
      12/18/95               84.3%              164.0%         112.2%
      12/19/95               84.3%              167.0%         116.3%
      12/20/95               86.4%              170.3%         125.8%
      12/21/95               87.9%              183.5%         128.2%
      12/22/95               91.4%              192.2%         126.3%
      12/25/95               91.4%              192.2%         126.3%
      12/26/95               85.7%              189.0%         134.8%
      12/27/95               91.4%              191.5%         142.3%
      12/28/95               87.1%              193.1%         147.3%
      12/29/95               85.7%              194.7%         146.2%
        1/1/96               85.7%              194.7%         146.2%
        1/2/96               91.4%              191.6%         147.2%
        1/3/96               88.6%              190.0%         146.1%
        1/4/96               90.7%              183.1%         142.4%
        1/5/96               95.7%              185.8%         146.2%
        1/8/96               88.6%              183.0%         149.7%
        1/9/96               85.7%              178.9%         143.8%
       1/10/96               81.4%              174.4%         142.2%
       1/11/96               82.9%              177.1%         141.4%
       1/12/96               88.6%              179.7%         140.6%
       1/15/96               85.7%              180.7%         140.6%
       1/16/96               82.9%              183.0%         140.8%
       1/17/96               88.6%              185.4%         149.0%
       1/18/96               81.4%              189.7%         152.7%
       1/19/96               85.7%              188.9%         153.3%
       1/22/96               82.9%              184.9%         155.1%
       1/23/96               81.4%              189.8%         156.6%
       1/24/96               85.7%              190.2%         164.6%
       1/25/96               81.4%              191.9%         168.2%
       1/26/96               80.0%              196.5%         177.9%
       1/29/96               72.9%              194.4%         175.0%
       1/30/96               82.9%              201.3%         164.0%
       1/31/96               80.0%              198.9%         172.9%
        2/1/96               82.9%              206.7%         170.5%
        2/2/96               80.0%              199.0%         171.3%
        2/5/96               80.0%              200.2%         169.9%
        2/6/96               82.9%              199.3%         170.2%
        2/7/96               80.0%              205.2%         165.3%
        2/8/96               87.1%              204.2%         161.1%
        2/9/96               82.9%              205.5%         156.2%
       2/12/96               82.9%              205.5%         163.1%
       2/13/96               82.9%              205.1%         159.2%
       2/14/96               82.9%              200.9%         157.4%
       2/15/96               85.7%              200.6%         155.3%
       2/16/96               78.6%              203.3%         156.6%
       2/19/96               78.6%              203.3%         156.6%
       2/20/96               80.7%              198.5%         161.8%
       2/21/96               77.9%              197.6%         163.0%
       2/22/96               77.1%              202.7%         160.1%
       2/23/96               84.3%              201.1%         163.7%
       2/26/96               77.1%              200.2%         156.7%
       2/27/96               80.0%              198.6%         155.9%
       2/28/96               78.6%              196.9%         175.9%
       2/29/96               84.3%              195.3%         174.6%
        3/1/96               78.6%              195.9%         169.3%
        3/4/96               75.7%              201.0%         163.2%
        3/5/96               75.7%              210.2%         167.2%
        3/6/96               80.0%              212.8%         167.7%
        3/7/96               75.7%              215.0%         164.1%
        3/8/96               75.7%              199.5%         157.1%
       3/11/96               75.7%              201.2%         157.8%
       3/12/96               75.7%              197.5%         152.4%
       3/13/96               75.7%              202.3%         151.8%
       3/14/96               75.7%              203.7%         154.7%
       3/15/96               71.4%              202.1%         150.0%
       3/18/96               71.4%              200.9%         154.3%
       3/19/96               71.4%              196.8%         154.4%
       3/20/96               73.6%              194.4%         155.6%
       3/21/96               72.9%              200.2%         154.9%
       3/22/96               76.4%              203.2%         151.6%
       3/25/96               75.7%              192.2%         145.6%
       3/26/96               74.3%              190.6%         144.6%
       3/27/96               75.0%              191.6%         142.6%
       3/28/96               71.4%              192.9%         145.3%
       3/29/96               77.1%              189.0%         149.4%
        4/1/96               74.3%              187.6%         154.1%
        4/2/96               72.9%              191.5%         155.3%
        4/3/96               71.4%              192.7%         155.6%
        4/4/96               72.9%              192.1%         154.1%
        4/5/96               72.9%              192.1%         154.1%
        4/8/96               70.0%              186.2%         150.3%
        4/9/96               70.7%              183.1%         151.1%
       4/10/96               68.6%              172.0%         148.3%
       4/11/96               68.6%              173.8%         142.8%
       4/12/96               68.6%              179.4%         147.0%
       4/15/96               68.6%              178.8%         147.6%
       4/16/96               70.0%              179.1%         148.7%
       4/17/96               70.0%              175.0%         151.2%
       4/18/96               71.4%              186.6%         158.3%
       4/19/96               71.4%              183.6%         161.5%
       4/22/96               72.1%              184.3%         161.2%
       4/23/96               72.9%              185.6%         164.8%
       4/24/96               73.6%              180.8%         168.0%
       4/25/96               72.9%              185.5%         162.8%
       4/26/96               70.0%              187.3%         161.6%
       4/29/96               70.0%              187.3%         159.0%
       4/30/96               70.0%              189.4%         158.5%
        5/1/96               75.7%              189.0%         169.3%
        5/2/96               74.3%              176.4%         169.6%
        5/3/96               71.4%              173.5%         171.3%
        5/6/96               72.9%              179.3%         175.9%
        5/7/96               70.0%              179.0%         174.5%
        5/8/96               71.4%              182.9%         171.5%
        5/9/96               71.4%              182.4%         177.2%
       5/10/96               72.1%              184.3%         183.0%
       5/13/96               72.9%              189.1%         189.0%
       5/14/96               75.7%              190.4%         183.9%
       5/15/96               71.4%              188.5%         184.9%
       5/16/96               70.0%              192.4%         191.2%
       5/17/96               68.6%              195.7%         194.6%
       5/20/96               65.7%              195.9%         195.1%
       5/21/96               65.7%              194.6%         190.2%
       5/22/96               62.9%              197.3%         190.5%
       5/23/96               62.9%              198.9%         191.2%
       5/24/96              106.4%              197.3%         184.1%
       5/27/96              106.4%              197.3%         184.1%
       5/28/96               98.6%              193.7%         185.3%
       5/29/96               98.6%              193.1%         185.8%
       5/30/96              100.0%              195.9%         184.6%
       5/31/96              100.0%              194.0%         186.6%
        6/3/96              101.4%              192.3%         188.8%
        6/4/96              101.4%              193.7%         188.9%
        6/5/96              101.4%              195.8%         189.5%
        6/6/96              101.4%              195.8%         190.7%
        6/7/96              100.4%              192.9%         191.1%
       6/10/96              100.0%              193.4%         195.9%
       6/11/96              102.1%              192.5%         195.9%
       6/12/96              102.9%              190.9%         190.6%
       6/13/96              100.7%              192.6%         190.3%
       6/14/96              101.8%              190.3%         184.9%
       6/17/96              101.4%              191.6%         180.8%
       6/18/96              101.4%              187.6%         173.1%
       6/19/96              101.4%              182.8%         170.5%
       6/20/96              102.1%              181.4%         168.7%
       6/21/96              101.4%              179.3%         172.1%
       6/24/96              101.4%              181.7%         169.4%
       6/25/96              101.6%              182.3%         171.2%
       6/26/96              101.8%              181.7%         167.7%
       6/27/96              100.7%              174.9%         164.0%
       6/28/96              102.9%              174.3%         167.7%
        7/1/96              100.7%              179.8%         163.6%
        7/2/96              101.8%              176.9%         157.1%
        7/3/96              101.4%              176.9%         153.3%
        7/4/96              101.4%              176.9%         153.3%
        7/5/96              100.7%              171.0%         149.6%
        7/8/96               99.3%              166.4%         146.3%
        7/9/96              100.7%              170.9%         149.1%
       7/10/96              100.0%              168.6%         138.7%
       7/11/96               99.3%              168.9%         135.0%
       7/12/96               99.6%              174.6%         141.2%
       7/15/96              101.4%              176.3%         123.0%
       7/16/96               98.6%              176.5%         120.1%
       7/17/96               99.3%              174.3%         127.7%
       7/18/96              100.0%              178.6%         134.6%
       7/19/96               99.3%              181.0%         131.3%
       7/22/96              102.1%              177.1%         128.5%
       7/23/96              100.7%              170.6%         119.7%
       7/24/96              100.0%              173.3%         115.1%
       7/25/96              100.4%              176.5%         117.9%
       7/26/96              101.4%              176.0%         126.3%
       7/29/96               99.3%              174.8%         129.6%
       7/30/96              100.4%              176.4%         128.2%
       7/31/96              100.0%              176.0%         134.8%
        8/1/96              100.0%              177.7%         135.6%
        8/2/96               99.3%              177.7%         141.4%
        8/5/96               99.8%              177.9%         134.1%
        8/6/96              100.0%              182.0%         136.1%
        8/7/96               94.3%              181.1%         140.3%
        8/8/96               91.4%              179.6%         138.5%
        8/9/96               91.4%              179.1%         138.2%
       8/12/96               91.4%              183.9%         136.2%
       8/13/96               87.1%              186.8%         134.0%
       8/14/96               85.7%              186.3%         136.4%
       8/15/96               88.2%              190.8%         133.3%
       8/16/96               87.1%              189.5%         136.6%
       8/19/96               86.4%              187.3%         136.6%
       8/20/96               85.7%              181.0%         135.4%
       8/21/96               85.7%              188.8%         130.2%
       8/22/96               87.9%              201.3%         132.7%
       8/23/96               89.3%              204.4%         132.9%
       8/26/96               88.6%              200.5%         132.6%
       8/27/96               88.9%              200.3%         130.8%
       8/28/96               89.6%              195.6%         130.9%
       8/29/96               88.9%              190.0%         140.7%
       8/30/96               88.6%              189.7%         140.1%
        9/2/96               88.6%              189.7%         140.1%
        9/3/96               87.9%              188.8%         136.8%
        9/4/96               88.9%              187.1%         130.5%
        9/5/96               90.0%              182.7%         124.6%
        9/6/96               90.0%              186.0%         131.4%
        9/9/96               89.3%              189.4%         136.0%
       9/10/96               89.3%              187.4%         134.8%
       9/11/96               89.3%              185.9%         131.9%
       9/12/96               89.3%              190.9%         133.9%
       9/13/96               87.9%              193.3%         135.1%
       9/16/96               89.3%              193.2%         137.7%
       9/17/96               89.3%              192.9%         135.6%
       9/18/96               87.9%              193.3%         133.9%
       9/19/96               89.3%              194.5%         132.1%
       9/20/96               89.3%              197.1%         132.0%
       9/23/96               87.9%              197.5%         128.3%
       9/24/96               88.6%              200.7%         129.0%
       9/25/96               89.3%              205.4%         137.1%
       9/26/96               87.9%              204.9%         145.1%
       9/27/96               89.3%              205.5%         147.2%
       9/30/96               88.6%              205.6%         142.5%
       10/1/96               90.0%              207.0%         138.5%
       10/2/96               94.3%              201.8%         144.2%
       10/3/96               94.3%              199.7%         141.0%
       10/4/96               90.7%              202.2%         137.5%
       10/7/96               90.7%              198.5%         132.5%
       10/8/96               91.1%              200.1%         129.6%
       10/9/96               91.8%              201.2%         129.5%
      10/10/96               91.4%              201.2%         130.9%
      10/11/96               92.9%              208.6%         136.1%
      10/14/96               91.4%              206.7%         137.1%
      10/15/96               91.4%              195.2%         138.9%
      10/16/96               93.6%              192.1%         141.1%
      10/17/96               92.9%              195.9%         139.5%
      10/18/96               93.6%              201.9%         140.6%
      10/21/96               94.3%              204.5%         136.1%
      10/22/96               93.6%              200.3%         133.8%
      10/23/96               92.1%              201.0%         130.6%
      10/24/96               93.6%              203.9%         132.7%
      10/25/96               94.3%              203.9%         133.4%
      10/28/96               91.4%              204.8%         131.7%
      10/29/96               81.4%              202.6%         125.7%
      10/30/96               83.6%              197.8%         125.4%
      10/31/96               85.0%              198.7%         125.7%
       11/1/96               84.3%              197.0%         123.4%
       11/4/96               85.7%              190.7%         122.4%
       11/5/96               84.3%              191.7%         124.7%
       11/6/96               82.9%              194.8%         128.1%
       11/7/96               85.7%              191.3%         125.4%
       11/8/96               85.7%              190.7%         126.7%
      11/11/96               83.2%              186.1%         130.8%
      11/12/96               81.4%              191.4%         134.2%
      11/13/96               84.3%              194.0%         135.5%
      11/14/96               84.3%              194.3%         136.8%
      11/15/96               86.4%              191.0%         129.9%
      11/18/96               82.9%              186.6%         127.9%
      11/19/96               82.9%              186.7%         130.6%
      11/20/96               85.0%              189.9%         130.4%
      11/21/96               83.6%              190.0%         136.1%
      11/22/96               86.4%              194.3%         141.3%
      11/25/96               83.6%              195.0%         139.5%
      11/26/96               87.1%              199.6%         139.2%
      11/27/96               86.4%              198.1%         145.8%
      11/28/96               86.4%              198.1%         145.8%
      11/29/96               85.0%              197.4%         162.1%
       12/2/96               86.4%              198.5%         157.7%
       12/3/96               85.7%              200.9%         173.2%
       12/4/96               82.9%              201.4%         162.0%
       12/5/96               82.1%              201.7%         165.4%
       12/6/96               81.4%              196.7%         164.1%
       12/9/96               80.0%              196.6%         158.0%
      12/10/96               87.9%              199.2%         152.8%
      12/11/96               83.2%              194.4%         150.8%
      12/12/96               80.7%              189.5%         142.4%
      12/13/96               86.4%              190.4%         150.8%
      12/16/96               85.7%              186.6%         150.0%
      12/17/96               82.1%              185.4%         150.3%
      12/18/96               80.0%              188.5%         155.7%
      12/19/96               88.6%              191.2%         154.6%
      12/20/96               88.2%              190.0%         156.5%
      12/23/96               85.7%              186.8%         147.1%
      12/24/96               85.7%              184.9%         149.7%
      12/25/96               85.7%              184.9%         149.7%
      12/26/96               89.3%              184.5%         151.3%
      12/27/96               89.3%              186.0%         151.5%
      12/30/96               85.7%              183.0%         150.2%
      12/31/96               87.1%              181.7%         150.7%
        1/3/97              88.60%             177.85%        158.56%
                  
- ----------
(a)  The AMEX Biotechnology Index includes: AMGN, BGEN, CEPH, CGNE, CHIR, CNTO,
     CORR, GENZ, GILD, IMNR, LIPO, ORG, PDLI and VRTX.


                                       5
<PAGE>

Stock Price and Volume History
================================================================================
Sprint vs. Comparable Gene/Cell Therapy Company Index
1/2/95 to 1/3/97

[The following table was represented as a line graph in the printed material.]

 Sprint             AMEX Biotech Index(b)        Comparable   Company Index(c)
 ------             ---------------------        ----------   ----------------
 1/2/95                   100.0%                   100.0%         100.0%
 1/3/95                    98.6%                    99.6%          96.0%
 1/4/95                    98.6%                    85.6%          99.3%
 1/5/95                    97.1%                    86.6%         100.7%
 1/6/95                    97.1%                    86.5%          97.3%
 1/9/95                    97.1%                    86.2%          99.2%
 1/10/95                  100.0%                    85.6%          96.5%
 1/11/95                   99.3%                    83.7%          93.7%
 1/12/95                   94.3%                    82.3%          93.7%
 1/13/95                   97.1%                    83.0%          97.0%
 1/16/95                   90.4%                    84.1%          99.3%
 1/17/95                   90.0%                    83.7%         100.3%
 1/18/95                   90.0%                    83.5%          98.5%
 1/19/95                   97.1%                    83.1%          97.7%
 1/20/95                   94.3%                    82.6%          97.5%
 1/23/95                   92.9%                    83.8%          96.6%
 1/24/95                   95.7%                    86.5%          94.9%
 1/25/95                   94.3%                    87.0%          95.3%
 1/26/95                   90.0%                    88.2%          95.9%
 1/27/95                   90.0%                    88.2%          97.2%
 1/30/95                   91.4%                    87.8%          96.4%
 1/31/95                   97.9%                    91.9%          97.9%
 2/1/95                   101.4%                    90.2%          97.1%
 2/2/95                   100.7%                    89.9%         100.5%
 2/3/95                    97.9%                    90.8%         105.5%
 2/6/95                    97.1%                    92.7%         103.5%
 2/7/95                    97.1%                    92.4%         103.6%
 2/8/95                    94.3%                    96.4%         105.5%
 2/9/95                    97.1%                    92.8%         106.0%
 2/10/95                   92.9%                    93.3%         107.9%
 2/13/95                   94.3%                    90.0%         106.2%
 2/14/95                   87.9%                    90.6%         107.0%
 2/15/95                   82.9%                    91.0%         109.4%
 2/16/95                   88.6%                    91.8%         106.1%
 2/17/95                   94.3%                    90.3%         102.3%
 2/20/95                   94.3%                    90.3%         102.3%
 2/21/95                   90.0%                    90.3%         103.2%
 2/22/95                   90.0%                    90.1%         103.2%
 2/23/95                   88.6%                    90.0%         103.5%
 2/24/95                   91.4%                    91.3%         104.8%
 2/27/95                   85.7%                    89.8%         103.9%
 2/28/95                   88.6%                    91.9%         101.4%
 3/1/95                    85.7%                    89.8%         100.1%
 3/2/95                    91.4%                    89.0%          98.9%
 3/3/95                    88.6%                    89.7%         101.1%
 3/6/95                    85.7%                    89.3%         100.0%
 3/7/95                    87.1%                    88.3%          97.6%
 3/8/95                    84.3%                    88.9%          94.5%
 3/9/95                    82.9%                    87.9%          96.1%
 3/10/95                   83.6%                    88.9%          94.1%
 3/13/95                   84.3%                    89.4%          91.5%
 3/14/95                   82.1%                    88.6%          94.1%
 3/15/95                   80.7%                    88.4%          86.2%
 3/16/95                   84.3%                    88.5%          88.4%
 3/17/95                   77.1%                    88.4%          89.8%
 3/20/95                   82.9%                    88.3%          89.7%
 3/21/95                   77.1%                    88.7%          89.2%
 3/22/95                   82.9%                    88.3%          87.8%
 3/23/95                   77.1%                    87.6%          87.3%
 3/24/95                   77.1%                    88.0%          86.2%
 3/27/95                   82.9%                    89.6%          85.3%
 3/28/95                   74.3%                    90.3%          88.0%
 3/29/95                   71.4%                    88.8%          89.3%
 3/30/95                   80.0%                    87.2%          93.6%
 3/31/95                   81.4%                    86.8%          96.8%
 4/3/95                    80.0%                    85.3%          88.9%
 4/4/95                    74.3%                    84.8%          89.9%
 4/5/95                    77.1%                    85.1%          88.3%
 4/6/95                    74.3%                    86.1%          84.6%
 4/7/95                    74.3%                    85.0%          85.3%
 4/10/95                   77.1%                    87.9%          86.9%
 4/11/95                   71.4%                    88.1%          87.3%
 4/12/95                   74.3%                    89.7%          91.2%
 4/13/95                   80.0%                    89.0%          94.0%
 4/14/95                   80.0%                    89.0%          94.0%
 4/17/95                   80.0%                    88.0%          93.4%
 4/18/95                   71.4%                    87.2%          89.7%
 4/19/95                   71.4%                    87.6%          89.9%
 4/20/95                   71.4%                    87.7%          88.3%
 4/21/95                   71.4%                    89.0%          90.7%
 4/24/95                   71.4%                    88.6%          92.7%
 4/25/95                   78.6%                    87.6%          90.6%
 4/26/95                   71.4%                    89.9%          91.2%
 4/27/95                   71.4%                    92.3%          91.5%
 4/28/95                   80.0%                    91.8%          90.8%
 5/1/95                    71.4%                    89.7%          96.4%
 5/2/95                    71.4%                    89.8%          95.9%
 5/3/95                    80.0%                    91.9%          95.5%
 5/4/95                    71.4%                    91.8%          91.0%
 5/5/95                    71.4%                    92.4%          90.9%
 5/8/95                    71.4%                    92.1%          90.5%
 5/9/95                    71.4%                    90.4%          87.2%
 5/10/95                   77.1%                    90.0%          92.2%
 5/11/95                   71.4%                    89.4%          94.3%
 5/12/95                   71.4%                    88.4%          95.1%
 5/15/95                   77.1%                    88.6%          95.2%
 5/16/95                   72.1%                    88.8%          92.8%
 5/17/95                   80.0%                    88.7%          93.6%
 5/18/95                   72.9%                    88.2%          95.3%
 5/19/95                   77.1%                    89.5%          93.3%
 5/22/95                   80.0%                    89.0%          93.0%
 5/23/95                   75.7%                    88.6%          94.5%
 5/24/95                   72.9%                    88.0%          94.5%
 5/25/95                   72.9%                    88.0%          94.2%
 5/26/95                   70.0%                    87.6%          92.0%
 5/29/95                   70.0%                    87.6%          92.0%
 5/30/95                   77.1%                    88.0%          91.0%
 5/31/95                   78.6%                    90.4%          92.0%
 6/1/95                    75.7%                    91.1%          94.0%
 6/2/95                    70.0%                    92.8%          94.1%
 6/5/95                    78.6%                    94.7%          96.1%
 6/6/95                    77.1%                    92.2%          95.5%
 6/7/95                    70.0%                    92.4%          95.9%
 6/8/95                    74.3%                    92.1%          96.3%
 6/9/95                    75.7%                    90.6%          95.3%
 6/12/95                   75.7%                    95.5%          95.8%
 6/13/95                   81.4%                    95.8%          95.1%
 6/14/95                   78.6%                    95.4%          95.7%
 6/15/95                   81.4%                    97.0%          95.4%
 6/16/95                   80.7%                    99.0%          96.4%
 6/19/95                   77.1%                   100.2%          97.2%
 6/20/95                   77.1%                   100.8%          98.8%
 6/21/95                   72.1%                    99.7%         109.7%
 6/22/95                   72.9%                   103.5%         104.6%
 6/23/95                   80.0%                   102.4%         105.7%
 6/26/95                   77.1%                   102.5%         106.4%
 6/27/95                   82.9%                   102.1%         107.7%
 6/28/95                   80.7%                   103.5%         108.7%
 6/29/95                   80.0%                   102.9%         113.7%
 6/30/95                   82.9%                   103.5%         118.6%
 7/3/95                    74.3%                   103.1%         120.5%
 7/4/95                    74.3%                   103.1%         120.5%
 7/5/95                    80.0%                   103.2%         120.8%
 7/6/95                    80.0%                   103.9%         118.7%
 7/7/95                    74.3%                   103.1%         116.5%
 7/10/95                   74.3%                   101.0%         116.7%
 7/11/95                   77.1%                   101.9%         121.1%
 7/12/95                   81.4%                   103.6%         125.0%
 7/13/95                   81.4%                   104.0%         121.3%
 7/14/95                   72.9%                   106.8%         122.2%
 7/17/95                   74.3%                   106.9%         120.9%
 7/18/95                   77.1%                   106.8%         119.8%
 7/19/95                   80.0%                   104.5%         113.8%
 7/20/95                   74.3%                   103.6%         114.8%
 7/21/95                   81.4%                   105.0%         120.4%
 7/24/95                   76.4%                   106.0%         125.5%
 7/25/95                   77.1%                   105.4%         122.7%
 7/26/95                   74.3%                   110.6%         122.2%
 7/27/95                   72.9%                   114.9%         116.6%
 7/28/95                   74.3%                   115.2%         113.2%
 7/31/95                   74.3%                   115.8%         120.9%
 8/1/95                    77.1%                   114.4%         123.1%
 8/2/95                    74.3%                   113.5%         120.3%
 8/3/95                    80.7%                   113.1%         126.0%
 8/4/95                    77.9%                   112.8%         127.2%
 8/7/95                    75.7%                   113.4%         126.8%
 8/8/95                    75.7%                   117.1%         123.4%
 8/9/95                    74.3%                   126.0%         134.0%
 8/10/95                   74.3%                   125.1%         135.3%
 8/11/95                   74.3%                   129.2%         135.5%
 8/14/95                   75.0%                   130.0%         135.1%
 8/15/95                   75.0%                   128.5%         136.8%
 8/16/95                   72.9%                   130.2%         136.1%
 8/17/95                   71.4%                   129.5%         136.6%
 8/18/95                   70.0%                   132.6%         136.4%
 8/21/95                   77.1%                   135.3%         137.7%
 8/22/95                   77.1%                   134.3%         137.7%
 8/23/95                   70.0%                   131.4%         144.0%
 8/24/95                   74.3%                   127.6%         143.3%
 8/25/95                   74.3%                   128.5%         143.4%
 8/28/95                   67.1%                   125.5%         139.5%
 8/29/95                   67.1%                   127.6%         134.4%
 8/30/95                   74.3%                   129.9%         137.0%
 8/31/95                   74.3%                   131.6%         140.8%
 9/1/95                    68.6%                   129.5%         140.3%
 9/4/95                    68.6%                   129.5%         140.3%
 9/5/95                    75.7%                   135.0%         138.5%
 9/6/95                    75.7%                   134.8%         137.4%
 9/7/95                    68.6%                   136.2%         137.3%
 9/8/95                    75.7%                   139.0%         135.2%
 9/11/95                   70.0%                   141.1%         135.9%
 9/12/95                   71.4%                   140.0%         140.8%
 9/13/95                   74.3%                   138.4%         144.7%
 9/14/95                   74.3%                   137.8%         144.6%
 9/15/95                   74.3%                   138.6%         138.4%
 9/18/95                   77.9%                   137.8%         136.9%
 9/19/95                   74.3%                   140.4%         140.0%
 9/20/95                   74.3%                   137.9%         141.1%
 9/21/95                   80.0%                   136.7%         138.3%
 9/22/95                   74.3%                   138.2%         133.2%
 9/25/95                   77.1%                   136.8%         131.2%
 9/26/95                   77.1%                   138.4%         126.8%
 9/27/95                   72.9%                   136.9%         122.9%
 9/28/95                   77.1%                   137.8%         127.4%
 9/29/95                   77.1%                   136.4%         129.4%
10/2/95                    78.6%                   134.4%         129.1%
10/3/95                    84.3%                   131.0%         117.5%
10/4/95                    84.3%                   133.5%         120.3%
10/5/95                    81.4%                   135.0%         121.3%
10/6/95                    84.3%                   134.9%         123.4%
10/9/95                    84.3%                   129.5%         118.7%
10/10/95                   83.6%                   127.3%         121.2%
10/11/95                   79.6%                   129.5%         119.5%
10/12/95                   82.1%                   130.0%         123.5%
10/13/95                   80.0%                   132.6%         122.9%
10/16/95                   77.1%                   132.0%         127.7%
10/17/95                   81.4%                   136.2%         126.3%
10/18/95                   80.0%                   135.4%         129.7%
10/19/95                   80.0%                   138.3%         124.1%
10/20/95                   77.9%                   130.5%         125.0%
10/23/95                   79.3%                   130.2%         123.0%
10/24/95                   77.9%                   127.5%         123.9%
10/25/95                   77.9%                   127.5%         125.3%
10/26/95                   82.9%                   125.6%         118.6%
10/27/95                   80.0%                   129.7%         118.5%
10/30/95                   77.9%                   132.1%         117.6%
10/31/95                   80.0%                   135.0%         112.9%
11/1/95                    82.9%                   130.6%         106.8%
11/2/95                    84.3%                   129.3%         105.2%
11/3/95                    85.7%                   131.5%         107.6%
11/6/95                    86.4%                   131.8%         109.7%
11/7/95                    88.6%                   132.5%         109.2%
11/8/95                    82.9%                   132.3%         105.7%
11/9/95                    82.9%                   137.0%         110.9%
11/10/95                   85.7%                   137.5%         112.1%
11/13/95                   90.0%                   138.3%         108.8%
11/14/95                   88.6%                   136.8%         106.2%
11/15/95                   85.7%                   136.9%         116.7%
11/16/95                   85.7%                   133.4%         118.3%
11/17/95                   90.0%                   134.4%         117.2%
11/20/95                   91.4%                   132.4%         114.6%
11/21/95                   85.7%                   129.3%         114.5%
11/22/95                   90.0%                   130.4%         113.1%
11/23/95                   90.0%                   130.4%         113.1%
11/24/95                   85.7%                   131.8%         116.0%
11/27/95                   85.7%                   134.1%         116.4%
11/28/95                   87.1%                   141.1%         114.4%
11/29/95                   81.4%                   140.9%         116.8%
11/30/95                   84.3%                   141.5%         114.9%
12/1/95                    81.4%                   140.1%         115.7%
12/4/95                    85.7%                   145.4%         119.0%
12/5/95                    84.3%                   148.1%         125.1%
12/6/95                    93.6%                   148.9%         121.2%
12/7/95                    88.6%                   148.9%         121.1%
12/8/95                    84.3%                   150.4%         119.8%
12/11/95                   84.3%                   147.6%         119.4%
12/12/95                   85.7%                   144.9%         121.7%
12/13/95                   87.1%                   146.0%         119.4%
12/14/95                   88.6%                   140.9%         115.6%
12/15/95                   88.6%                   142.2%         119.0%
12/18/95                   84.3%                   139.1%         112.5%
12/19/95                   84.3%                   141.8%         116.4%
12/20/95                   86.4%                   145.3%         126.5%
12/21/95                   87.9%                   156.0%         128.5%
12/22/95                   91.4%                   161.6%         126.4%
12/25/95                   91.4%                   161.6%         126.4%
12/26/95                   85.7%                   159.4%         134.7%
12/27/95                   91.4%                   160.8%         142.7%
12/28/95                   87.1%                   161.2%         148.0%
12/29/95                   85.7%                   161.6%         146.7%
 1/1/96                    85.7%                   161.6%         146.7%
 1/2/96                    91.4%                   158.9%         147.7%
 1/3/96                    88.6%                   160.0%         146.5%
 1/4/96                    90.7%                   158.5%         142.3%
 1/5/96                    95.7%                   156.9%         146.4%
 1/8/96                    88.6%                   153.3%         149.2%
 1/9/96                    85.7%                   151.5%         143.3%
 1/10/96                   81.4%                   146.4%         142.2%
 1/11/96                   82.9%                   149.1%         140.6%
 1/12/96                   88.6%                   151.2%         139.9%
 1/15/96                   85.7%                   152.5%         139.5%
 1/16/96                   82.9%                   156.4%         139.8%
 1/17/96                   88.6%                   158.1%         148.4%
 1/18/96                   81.4%                   158.5%         152.6%
 1/19/96                   85.7%                   155.4%         153.3%
 1/22/96                   82.9%                   152.5%         154.3%
 1/23/96                   81.4%                   153.6%         155.8%
 1/24/96                   85.7%                   157.3%         163.7%
 1/25/96                   81.4%                   159.6%         166.7%
 1/26/96                   80.0%                   163.9%         175.7%
 1/29/96                   72.9%                   161.3%         173.0%
 1/30/96                   82.9%                   166.5%         162.5%
 1/31/96                   80.0%                   166.9%         171.6%
 2/1/96                    82.9%                   169.2%         169.4%
 2/2/96                    80.0%                   165.5%         170.3%
 2/5/96                    80.0%                   165.5%         168.8%
 2/6/96                    82.9%                   164.6%         169.0%
 2/7/96                    80.0%                   169.6%         164.6%
 2/8/96                    87.1%                   168.0%         160.8%
 2/9/96                    82.9%                   167.7%         155.4%
 2/12/96                   82.9%                   169.9%         161.5%
 2/13/96                   82.9%                   168.1%         157.7%
 2/14/96                   82.9%                   166.4%         156.2%
 2/15/96                   85.7%                   168.0%         153.6%
 2/16/96                   78.6%                   169.4%         155.0%
 2/19/96                   78.6%                   169.4%         155.0%
 2/20/96                   80.7%                   163.9%         160.6%
 2/21/96                   77.9%                   163.2%         161.5%
 2/22/96                   77.1%                   168.8%         158.5%
 2/23/96                   84.3%                   168.7%         162.2%
 2/26/96                   77.1%                   168.5%         155.0%
 2/27/96                   80.0%                   166.2%         153.7%
 2/28/96                   78.6%                   164.7%         174.8%
 2/29/96                   84.3%                   163.0%         173.2%
 3/1/96                    78.6%                   162.7%         168.4%
 3/4/96                    75.7%                   165.4%         162.2%
 3/5/96                    75.7%                   172.9%         165.9%
 3/6/96                    80.0%                   175.1%         166.9%
 3/7/96                    75.7%                   177.1%         163.1%
 3/8/96                    75.7%                   163.3%         156.3%
 3/11/96                   75.7%                   165.5%         157.0%
 3/12/96                   75.7%                   162.3%         151.7%
 3/13/96                   75.7%                   164.4%         151.3%
 3/14/96                   75.7%                   167.0%         154.1%
 3/15/96                   71.4%                   165.1%         149.2%
 3/18/96                   71.4%                   161.8%         153.5%
 3/19/96                   71.4%                   158.1%         153.9%
 3/20/96                   73.6%                   157.5%         154.3%
 3/21/96                   72.9%                   159.9%         153.7%
 3/22/96                   76.4%                   161.6%         150.6%
 3/25/96                   75.7%                   154.3%         144.6%
 3/26/96                   74.3%                   149.9%         143.7%
 3/27/96                   75.0%                   153.6%         141.7%
 3/28/96                   71.4%                   154.8%         144.4%
 3/29/96                   77.1%                   151.7%         148.5%
 4/1/96                    74.3%                   151.8%         153.3%
 4/2/96                    72.9%                   155.9%         155.1%
 4/3/96                    71.4%                   156.4%         155.7%
 4/4/96                    72.9%                   155.4%         153.9%
 4/5/96                    72.9%                   155.4%         153.9%
 4/8/96                    70.0%                   151.1%         149.9%
 4/9/96                    70.7%                   148.2%         150.2%
 4/10/96                   68.6%                   140.2%         147.9%
 4/11/96                   68.6%                   140.4%         142.5%
 4/12/96                   68.6%                   146.5%         146.5%
 4/15/96                   68.6%                   144.5%         147.4%
 4/16/96                   70.0%                   145.1%         148.5%
 4/17/96                   70.0%                   141.6%         151.0%
 4/18/96                   71.4%                   148.5%         157.6%
 4/19/96                   71.4%                   146.4%         160.7%
 4/22/96                   72.1%                   147.8%         160.6%
 4/23/96                   72.9%                   147.7%         163.5%
 4/24/96                   73.6%                   144.7%         166.8%
 4/25/96                   72.9%                   147.4%         161.7%
 4/26/96                   70.0%                   150.4%         160.5%
 4/29/96                   70.0%                   150.0%         158.1%
 4/30/96                   70.0%                   151.4%         157.8%
 5/1/96                    75.7%                   152.1%         169.2%
 5/2/96                    74.3%                   144.2%         168.8%
 5/3/96                    71.4%                   142.2%         170.8%
 5/6/96                    72.9%                   144.3%         174.5%
 5/7/96                    70.0%                   145.1%         172.9%
 5/8/96                    71.4%                   146.4%         169.8%
 5/9/96                    71.4%                   146.5%         174.9%
 5/10/96                   72.1%                   147.5%         180.6%
 5/13/96                   72.9%                   151.1%         185.9%
 5/14/96                   75.7%                   152.7%         181.7%
 5/15/96                   71.4%                   150.4%         182.1%
 5/16/96                   70.0%                   153.1%         188.3%
 5/17/96                   68.6%                   154.7%         192.2%
 5/20/96                   65.7%                   157.1%         192.7%
 5/21/96                   65.7%                   158.7%         187.7%
 5/22/96                   62.9%                   158.4%         187.9%
 5/23/96                   62.9%                   159.4%         188.6%
 5/24/96                  106.4%                   158.6%         182.1%
 5/27/96                  106.4%                   158.6%         182.1%
 5/28/96                   98.6%                   156.2%         183.3%
 5/29/96                   98.6%                   155.3%         184.2%
 5/30/96                  100.0%                   157.7%         182.5%
 5/31/96                  100.0%                   157.4%         184.0%
 6/3/96                   101.4%                   155.3%         186.2%
 6/4/96                   101.4%                   156.5%         186.4%
 6/5/96                   101.4%                   154.8%         186.6%
 6/6/96                   101.4%                   154.1%         187.8%
 6/7/96                   100.4%                   152.5%         188.7%
 6/10/96                  100.0%                   154.1%         193.0%
 6/11/96                  102.1%                   152.5%         192.4%
 6/12/96                  102.9%                   152.2%         187.4%
 6/13/96                  100.7%                   153.9%         187.1%
 6/14/96                  101.8%                   152.6%         182.7%
 6/17/96                  101.4%                   153.7%         179.0%
 6/18/96                  101.4%                   152.1%         170.9%
 6/19/96                  101.4%                   149.3%         168.2%
 6/20/96                  102.1%                   148.3%         166.2%
 6/21/96                  101.4%                   146.2%         170.1%
 6/24/96                  101.4%                   147.6%         168.2%
 6/25/96                  101.6%                   147.7%         170.1%
 6/26/96                  101.8%                   147.1%         166.6%
 6/27/96                  100.7%                   143.3%         162.8%
 6/28/96                  102.9%                   143.8%         166.8%
 7/1/96                   100.7%                   147.7%         162.0%
 7/2/96                   101.8%                   146.0%         155.1%
 7/3/96                   101.4%                   144.9%         151.5%
 7/4/96                   101.4%                   144.9%         151.5%
 7/5/96                   100.7%                   141.2%         147.9%
 7/8/96                    99.3%                   138.3%         144.2%
 7/9/96                   100.7%                   139.9%         146.8%
 7/10/96                  100.0%                   138.5%         136.5%
 7/11/96                   99.3%                   136.3%         132.7%
 7/12/96                   99.6%                   139.3%         139.6%
 7/15/96                  101.4%                   139.5%         122.1%
 7/16/96                   98.6%                   139.1%         119.9%
 7/17/96                   99.3%                   138.2%         127.2%
 7/18/96                  100.0%                   142.1%         133.5%
 7/19/96                   99.3%                   143.8%         130.3%
 7/22/96                  102.1%                   141.2%         127.4%
 7/23/96                  100.7%                   136.8%         118.8%
 7/24/96                  100.0%                   138.0%         114.5%
 7/25/96                  100.4%                   140.3%         116.8%
 7/26/96                  101.4%                   140.4%         125.0%
 7/29/96                   99.3%                   138.8%         128.8%
 7/30/96                  100.4%                   140.8%         127.3%
 7/31/96                  100.0%                   141.9%         133.1%
 8/1/96                   100.0%                   137.5%         133.8%
 8/2/96                    99.3%                   136.3%         139.4%

- ----------
(a)  AMEX Biotechnology Index includes: AMGN, BGEN, CEPH, CGNE, CHIR, CNTO,
     CORR, GENZ, GILD, IMNR, LIPO, ORG, PDLI and VRTX.
(b)  Comparable companies include: CEGE, CPRO, GMED, SOMA, TGEN, and VICL.


                                       6
<PAGE>

Stock Price and Volume History
================================================================================

Sprint 12 Month Volume Distribution by Price Range
(1/1/96 to 1/3/97)

Total Volume Traded:  17.1% of Shares Outstanding(a)

[The following table was represented as a bar graph in the printed material.]

Percent Volume Traded Within Price Range
- ----------------------------------
Up to $11.50            1.41%

$11.50 to               7.70%
$13.25

$13.25 to              22.25%
$15.00

$15.00 to              31.98%
$16.25

$16.25 to              24.54%
$18.50

$18.50 to              12.13%
$18.63

- ----------
(a) Total volume traded during period of 2,479,200 shares.


                                       7
<PAGE>

Stock Price and Volume History
================================================================================

24 Month Volume Distribution by Price Range
(1/1/95 to 1/3/97)

Total Volume Traded:  22.7% of Shares Outstanding(a)

[The following table was represented as a bar graph in the printed material.]

Volume Distribution by Price Range
- ----------------------------------
Up to $11.88            1.90%

$11.88 to              13.98%
$13.88

$13.88 to              37.07%
$15.88

$15.88 to              36.25%
$17.88

$17.88 to              10.79%
$18.63

- ----------
(a)  Total volume traded during period of 3,286,900 shares.


                                       8
<PAGE>





                                 LEHMAN BROTHERS

B
<PAGE>

Comparable Company Analysis
================================================================================

Analysis of Comparable Biotechnology Companies -- Gene Therapy Companies
($ in millions)

<TABLE>
<CAPTION>
                                                                 Burn                       Products in
                               Market    Technology    Cash      Life       Corporate       Development           Product
                              Value(a)   Value(a)(b)  Balance   (years)     Partners          Program              Focus
                              --------   -----------  -------   -------  ----------------   --------------     ------------------- 
<S>                             <C>         <C>       <C>         <C>    <C>                <C>                <C>  
Avigen Inc.                     $36.1       $15.1     $17.2       4.0    None               Preclinical        Cancer
                                                                                                               Blood Diseases
                                                                                                               Infectious Diseases

GeneMedicine, Inc.             $100.6        42.9      32.7       2.8    Roche              Phase I -1         Cancer, Muscle
                                                                         Corange                               Inflammatory, Blood
                                                                                                               Cardiovascular
                                                                                                               Growth Factors (3)

Ribozyme Pharmaceuticals         88.9        55.5      22.3       1.4    Chiron             Preclinical        Diabetic
                                                                         Parker-Davis                          Retinopathy
                                                                                                               HIV, Other

Somatix Therapy Corp.           107.4        70.8      13.8       0.7    Baxter Healthcare  Phase I/II - 4     Cancer, Neurology
                                                                         Bristol-Myers                         Hemophilia,
                                                                         Squibb                                Parkinson's
                                                                                                               Chronic
                                                                                                               Granulomatous
                                                                                            Phase I/II - 5
Targeted Genetics Corp.          99.2        69.6      21.9       1.3    Immunex                               HIV, Cancer
                                                                         CellPro                               Gaucher Disease
                                                                                                               Cystic Fibrosis

Vical Inc.                      270.7       219.9      48.7       8.7    Merck              Phase II - 1       Infectious Diseases
                                                                         Genzyme            Phase I/II - 2     Cancer
                                                                         Pasteur-Merieux
                                                                         Baxter, Isis
                                                                         Corixa

                             -------------------------------------------
       Mean                    $117.2       $79.0     $26.1       3.1
       Median                    99.9        62.6      22.1       2.1
       High                     270.7       219.9      48.7       8.7
       Low                       36.1        15.1      13.8       0.7
</TABLE>

- ----------
(a)  Calculated as of January 3, 1997.
(b)  Calculated as of January 3, 1997. Technology Value is Market Value less
     Cash Balance.


                                       9
<PAGE>

Comparable Company Analysis
================================================================================

Analysis of Comparable Biotechnology Companies -- Cell Therapy Companies
($ in millions)

<TABLE>
<CAPTION>
                                                                                           Number of
                                                              Burn                        Products in
                            Market    Technology   Cash       Life       Corporate        Development              Product
                           Value(a)    Value(a)   Balance    (years)     Partners           Program                 Focus
                          ----------  ----------  --------  ---------  --------------    ----------------   ------------------------
<S>                         <C>          <C>       <C>        <C>      <C>               <C>                <C>                
Cell Genesys, Inc.          $183.8       $77.4     $77.9      15.5     Japan Tobacco     Phase II - I       AIDS
                                                                       Hoechst Marion
                                                                       Roussel.

CellPro                     $196.1      $104.8     $65.3       4.0     Corixa            Phase I/II - 6     Cancer
                                                                       Targeted          Phase II - 1       AIDS
                                                                       Genetics          Phase III - 1
                                                                                         Eur. Approval - 1
- ------------------------------------------------------------------------------------------------------------------------------------
Sprint (b)                  $243.9      $199.4     $25.0       0.8     Sandoz            Phase I/II - 2     Autoimmune Disease
                                                                                                            Cancer
                                                                                                            Genetic Diseases
                                                                                                            Genetic Therapy
                                                                                                            Organ Transplantation
                                                                                                            AIDS
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


   Excludes Sprint
- ----------------------------------------------------------------------
      Mean                  $189.9       $91.1     $71.6       9.7

- ---------
(a)  Calculated as of January 3, 1996
(b)  Per discussion with Company management, Sprint had approximately $25
     million of cash on hand as of 12/31/96.


                                       10
<PAGE>





                                 LEHMAN BROTHERS

C
<PAGE>

Historical and Projected Financial Statements
================================================================================

Balance Sheet, September 30, 1996

                                  ASSETS

Current Assets
        Cash and cash equivalents (a)                                    $ 1,995
        Short-term investments (a)                                        48,373
        Other current assets                                               1,423
                                                                         -------
               Total Current Assets                                       51,791

Net property and equipment                                                44,862
Deposits and other assets                                                    617
                                                                         -------
                                                                         $97,270
                                                                         =======

                   LIABILITIES AND STOCKHOLDERS' EQUITY

Current Liabilities
        Accounts payable and accrued liabilities                         $ 6,744
        Current portion of capital lease obligations                       1,951
        Deferred revenue from related party                                8,400
        Current portion of accrued rent                                       54
                                                                         -------
                   Total Current Liabilities                              17,149

Noncurrent portion of capital lease obligation                             4,037
Accrued rent, less current portion                                         4,730
Stockholders' Equity                                                      71,354
                                                                         -------
                                                                         $97,270
                                                                         =======

- ----------
(a) Per discussion with Company management, Sprint had approximately $25 million
of cash and $6.0 million of debt as of December 31, 1996.
- --------------------------------------------------------------------------------


                                       11
<PAGE>

Historical and Projected Financial Statements
================================================================================

Years ending December 31,

($ in millions)

<TABLE>
<CAPTION>
                           1996      1997     1998        1999        2000      2001        2002      2003       2004       2005
                          ------    ------   -------     -------     ------    ------      ------   --------   --------   --------
<S>                        <C>       <C>       <C>        <C>        <C>       <C>       <C>        <C>        <C>        <C>     
Revenues                   $19.7     $31.5     $48.1      $106.6     $246.0    $566.7    $1,177.8   $1,958.4   $2,975.6   $3,761.3

COGS                        15.4      20.2      23.4        35.6       63.9     129.7       244.0      389.3      552.7      695.6
                          ------    ------   -------     -------     ------    ------      ------   --------   --------   --------
Gross Profit                 4.3      11.3      24.7        71.0      182.1     437.0       933.8    1,569.1    2,422.9    3,065.7

R&D                         40.0      48.0      55.4        57.1       58.8      85.0       176.7      293.8      446.3      564.2

SG&A                         6.7       7.6       9.6        10.3       11.4      28.3        58.9       97.9      148.8      188.1
                          ------    ------   -------     -------     ------    ------      ------   --------   --------   --------
EBIT                       (42.4)    (44.3)    (40.2)        3.6      112.0     323.6       698.2    1,177.4    1,827.8    2,313.5

Net Income                 (42.4)    (44.3)    (40.2)        3.6      112.0     244.8       412.0      694.7    1,078.4    1,364.9
                          ======    ======   =======     =======     ======    ======      ======   ========   ========   ========
Free Cash Flow             (34.7)    (45.8)    (40.3)       (4.0)      95.1     227.6       375.8      647.4    1,023.3    1,327.5

Cumulative Cash Flow      $(34.7)   $(80.5)  $(120.8)    $(124.8)    $(29.7)   $197.9      $573.7   $1,221.1   $2,244.4   $3,571.9
</TABLE>


                                       12
<PAGE>

Historical and Projected Financial Statements
================================================================================

Years ending December 31,

<TABLE>
<CAPTION>
                              1996      1997       1998       1999       2000       2001      2002       2003      2004      2005
                              ----      ----       ----       ----       ----       ----      ----       ----      ----      ----
<S>                           <C>        <C>        <C>        <C>        <C>        <C>       <C>        <C>       <C>       <C>
Revenue Growth                444%        60%        53%       121%       131%       130%      108%        66%       52%       26%

Gross Margin %                 22%        36%        51%        67%        74%        77%       79%        80%       81%       82%

As a % of Sales

   R&D                        203%       152%       115%        54%        24%        15%       15%        15%       15%       15%

   SG&A                        34%        24%        20%        10%         5%         5%        5%         5%        5%        5%

   EBIT Margin                 NM         NM         NM          3%        46%        57%       59%        60%       61%       62%
</TABLE>


                                       13
<PAGE>

Historical and Projected Financial Statements
================================================================================

Case Studies:  Amgen and Genentech

Growth and Margins Since Initial Product Sales

<TABLE>
<CAPTION>
                                                   Years Since Initial Product Launch
                                      --------------------------------------------------------------
($ in millions)                       Year 1        Year 2        Year 3       Year 4         Year 5           CAGR
                                      ------        ------        ------       ------         ------           ----
<S>                                   <C>           <C>           <C>         <C>            <C>     
Sprint (1999 - 2003)
  Sales
                                      $106.6        $246.0        $566.7      $1,177.8       $1,958.4
   % growth                              121%          131%          130%          108%            66%         107%
  EBIT(a)                                3.3         112.0         323.6         698.2        1,177.4
   % sales                                 3%           46%           57%           59%            60%

Amgen (1989 - 1993)
  Sales                               $147.6        $298.7        $682.0      $1,093.0       $1,373.8
   % growth                              116%          102%          128%           60%            26%          75%
  EBIT (a)                               9.5          64.5         245.8         588.0          597.9
   % sales                                 6%           22%           36%           54%            44%

Genentech (1987 - 1991)
  Sales                               $218.6        $322.7        $383.3        $446.7         $467.1
   % growth                              144%           48%           19%           17%             5%          21%
  EBIT (b)                              38.8          41.2          37.9          47.2            2.1
   % sales                                18%           13%           10%           11%             0%
</TABLE>

- ----------
(a)  Amgen EBIT excludes legal defense fees and awards.
(b)  Genentech EBIT excludes special charges of $23.3 in 1988 (Year 2) and
     $167.7 in 1990 (Year 4).


                                       14
<PAGE>

Historical and Projected Financial Statements
================================================================================

Case Studies:  Genentech and Genetics Institute
Projected vs. Actual Performance

<TABLE>
<CAPTION>

Genentech(a)                          1991          1992          1993          1994           1995         CAGR
                                      ----          ----          ----          ----           ----         ----
<S>                                   <C>           <C>         <C>           <C>            <C>            <C>
  Projected sales                     $585          $732        $1,034        $1,459         $1,853
    % growth                             -            25%           41%           41%            27%         33%
  Actual sales                        $516          $544          $650          $795           $918
    % growth                             -             5%           19%           22%            15%         15%
  Projected net income                 $67          $101          $176          $373           $484
    % projected sales                   11%           14%           17%           26%            26%         64%
  Actual net income                    $44           $21           $59          $124           $161
    % actual sales                       9%            4%            9%           16%            18%         38%

Genetics Institute(b)
  Projected sales                                   $115          $154          $210           $285
    % growth                                           -            34%           36%            36%         35%
  Actual sales                                       $88          $102          $131           $172
    % growth                                           -            16%           28%            31%         25%

  Projected net income                               $10           $19           $40            $41
    % projected sales                                  9%           12%           19%            14%         42%
  Actual net income                                 ($19)         ($17)         ($19)            $2
    % actual sales                                    NM            NM            NM              1%          NM
</TABLE>

- ----------
(a) Projections for Genentech's May 2, 1990 proxy related to the Merger with
    Roche Holdings. Per the proxy, the projections represented 50% of
    management's actual expectation of total sales.
(b) Projections per Genetic Institute's December 10, 1991 proxy related to the
    Merger with America Home Products.


                                       15
<PAGE>

Historical and Projected Financial Statements
================================================================================

Case Studies:  Applied Immune Sciences and Sprint
1993 Projections vs. 1995 Projections

<TABLE>
<CAPTION>

Applied Immune Sciences                   1993      1994       1995       1996         1997      CAGR
                                          ----      ----       ----       ----         ----      ----

<S>                                       <C>      <C>        <C>        <C>        <C>          <C> 
  1993 Projected sales(a)                 $  1                $ 8.0      $  43      $   183      $321
    % growth                               --        700%       438%       326%          75%      323%

  1995 Projected sales(b) (c)             $  1     $   1      $   2      $   2      $     5
    % growth                               --         80%        80%         0%         150%       69%

  1993 Projected net income(a)            $(21)    $ (20)     $  11      $ 130      $   171
    % 1993 projected sales                  NM        NM         26%        71%          53%       NM

  1995 Projected net income(b) (c) (d)    $(29)    $ (31)     $ (36)     $ (22)     $   (34)
    % 1995 projected sales                  NM        NM         NM         NM           NM        NM

Sprint                                    1992      1993       1994       1995         1996      CAGR
                                          ----      ----       ----       ----         ----      ----
  Projected sales(e)                      $  1     $  55      $ 315      $ 778      $ 1,135
    % growth                               --         NM        472%       147%          46%       NM

  Actual sales (f)                        $  5     $   6      $   4      $   4      $    20
    % growth                               --         20%        NM          0%         400%       41%
</TABLE>

- ----------
(a)  1993 projections per Applied Immune Sciences Merger Proxy dated August 20,
     1993.
(b)  1995 projections per Applied Immune Sciences Merger Proxy dated October 24,
     1995, Scenario A.
(c)  Represents actual sales and net income during these years. Included for
     comparison purposes to both the original projections and assumed subsequent
     growth.
(d)  1993 actual net income adjusted for $9.6 million in special RPR transaction
     costs.
(e)  Projected sales per Sprint's 1991 Tender Proxy dated December 20, 1991
(f)  1996 represents projected sales per Sprint's "Strategic Business Plan, 1996
     - 2005".


                                       16
<PAGE>

Historical and Projected Financial Statements
================================================================================

Large Capitalization Pharmaceutical Companies
($ in millions)

<TABLE>
<CAPTION>
                                   Ranked by 1995 EBIT                                            Ranked by 1995 EBIT Margin
                             ----------------------------------                                 -----------------------------------
                               EBIT       Revenue       Margin                                    Margin         EBIT      Revenue
                               ----       -------       ------                                    ------         ----      -------
                                                                   ----------------------------------------------------------------
<S>                          <C>         <C>             <C>         <C>                           <C>         <C>        <C>     
   1 Merck & Co.             $4,595.6    $16,681.1       27.5%       1 Sprint                      61.5%       $2,313.5   $3,761.3
                                                                   ----------------------------------------------------------------
   2 Bristol-Myers Squibb     3,615.0     13,767.0       26.3        2 Eli-Lilly & Company         29.3         1,981.8    6,763.8
   3 Bayer                    2,682.0     29,084.0        9.2        3 Schering-Plough             28.5         1,452.3    5,104.4
   4 Pfizer Inc.              2,560.2     10,021.4       25.5        4 Merck & Co.                 27.5         4,595.6   16,681.1
   5 AHP                      2,512.0     13,376.0       18.8        5 Bristol-Myers Squibb        26.3         3,615.0   13,767.0
   6 Hoechst                  2,342.8     34,040.3        6.9        6 Pfizer Inc.                 25.5         2,560.2   10,021.4
- -----------------------------------------------------------------
   7 Sprint (a)               2,313.5      3,761.3       61.5        7 AHP                         18.8         2,512.0   13,376.0
- -----------------------------------------------------------------
   8 Sandoz                   2,156.9     12,137.0       17.8        8 Roche Holdings AG           18.0         2,110.7   11,719.8
   9 Roche Holdings AG        2,110.7     11,719.8       18.0        9 Sandoz                      17.8         2,156.9   12,137.0
  10 Glaxo Wellcome plc       2,024.8     11,567.0       17.5       10 Glaxo Wellcome plc          17.5         2,024.8   11,567.0

- -----------------------------------------------------------------
     Amgen(b)                   743.6      1,939.9       38.3
- -----------------------------------------------------------------
</TABLE>

- ----------
(a)  Represents Sprints' projected EBIT and Revenues in 2005, per Sprint's
     projections.
(b)  Amgen's adjusted margins to account for royalties, corporate partner income
     and royalty income equals 34.2%.


                                       17
<PAGE>

Historical and Projected Financial Statements
================================================================================

Large Capitalization Pharmaceutical and Biotechnology Companies

                                             Fiscal Year 1995
                            ----------------------------------------------------
                                  EBIT              SG&A              R&D
                                 Margin           % Sales           % Sales
                            ----------------- ----------------- ----------------
- --------------------------------------------------------------------------------
Sprint (a)                        61.5%              5.0%             15.0%
- --------------------------------------------------------------------------------

American Home Products            18.8              37.2              10.1
Amgen                             38.3              21.6              23.3
Bristol-Myers Squibb              26.3              38.6               8.7
Chiron                           (11.6)             33.6              31.2
Eli Lilly & Co.                   29.3              27.4              15.4
Genentech                         16.0              27.4              39.6
Genzyme                            3.4              30.0              21.6
Glaxo Wellcome                    17.5              34.6              14.8
Merck & Co.                       27.5              19.8               8.0
Pfizer Inc.                       25.5              38.5              14.4
Pharmacia & Upjohn                17.5              36.9              17.7
Schering-Plough                   28.5              39.0              12.9
Warner-Lambert                    15.2              43.2               7.1
- --------------------------------------------------------------------------------
Mean                              19.4%             32.9%             17.3%
- --------------------------------------------------------------------------------

- ----------
(a)  Represents Sprint's projected margins as of 2005, per Sprint's projections.


                                       18
<PAGE>

Historical and Projected Financial Statements
================================================================================

Sprint -- Sales Composition

[The following table was represented as a pie graph in the printed material.]

                               2001%             
                               -----             
Cancer                          68%             
Autoimmune Disease              26%             
Genetic Disease                  5%             
Genetic Therapy                  1%             
                               1.0            
                                                             
                      Total $535.5
                                                   
                              2005%    
                              -----    
Cancer                         22%    
Autoimmune Disease             27%    
Genetic Disease                 2%    
Genetic Therapy                24%    
Organ Transplantation           4%    
Leukemia                       15%    
HIV                             6%    
                              1.0   
                                                   
                   Total $3,705.8

- ----------
(a)  Revenue for 2001 excludes $31.2 million of non-product collaborative
     research, milestone payment and royalty revenue.
(b)  Revenue for 2005 excludes $55.3 million of royalty revenue.
(c)  HIV represents the distributed net profit of the Sprint/Hurdle HIV joint
     venture. Total revenues from the joint venture are $25.5 million and
     $1,685.0 million in 2001 and 2005, respectively.


                                       19
<PAGE>

Historical and Projected Financial Statements
================================================================================

Sprint Projections -- Product Launch Assumptions

Product Launches:

Cancer                                          Genetic Therapy
     U.S.                  1999                      U.S.                2001
     Europe                1998                      Europe              2002
     Japan                 2000                      Japan               2003
Autoimmune                                      Transplantations
     U.S.                  2001                      U.S.                2004
     Europe                2001                      Europe              2004
     Japan                 2002                      Japan               2005
Genetic Disease                                 Leukemia
     U.S.                  2000                      U.S.                2003
     Europe                2000                      Europe              2004
     Japan                 2002                      Japan               2005
HIV, Symptomatic                                HIV, Asymptomatic
     U.S.                  2001                      U.S.                2003
     Europe                2002                      Europe              2004
     Japan                 2003                      Japan               2005


                                       20
<PAGE>

Historical and Projected Financial Statements
================================================================================

Sprint Projections -- Pricing Assumptions


            Product                Pricing                Rationale
- -------------------------------    -------     ---------------------------------
Cancer                             $15,000     o    Premium over unfractionated
                                                    bone marrow or mobilized
                                                    peripheral blood due to
                                                    increased survival rates.

Autoimmune Disease                 $15,000     o    Significant increase in
                                                    disease-free survival.
                                                    Potential to eliminate
                                                    chronic drug treatment costs
                                                    ($2,000/year for over 10 -
                                                    20 years).

Genetic Disease (in utero)         $60,000     o    Life time cure to replace
                                                    expensive chronic therapies
                                                    (e.g., $200,000 -
                                                    $350,000/patient/year).

Genetic Therapy -- Chemotherapy    $20,000     o    Premium over autologous HSC
                                                    due to increased survival
                                                    and cure rates.

Genetic Therapy -- HIV             $20,000     o    Increase life expectancy by
                                                    at least 12 - 18 months.

Solid Organ Transplantation        $20,000     o    Savings from avoiding cost
                                                    of organ transplant
                                                    rejection ($35,000 -
                                                    $45,000).

                                               o    Reduction in annual costs of
                                                    immunosuppressive drugs
                                                    ($10,000 - $20,000).

Leukemia                           $20,000     o    Premium price for all
                                                    transplants and T-cell
                                                    addback.


                                       21
<PAGE>

Historical and Projected Financial Statements
================================================================================

Sprint Projections -- Assumptions


Inflation:                             None. Based in 1996 dollars.

Cost of Goods Sold:                    Considers the number of patients treated
                                       each year and the direct material,
                                       labor, shipping costs, royalties and
                                       direct overhead associated with each
                                       treatment.

                                       Net of Japanese cell center
                                       manufacturing costs (paid by partner).

                                       Cell processing centers for the HSC-GT
                                       HIV product are separate from other
                                       multi-product centers.

                                       Costs for first tow HIV centers are
                                       funded equally by Sprint and Hurdle.

                                       Balance of the centers are funded from
                                       the project prior to profit
                                       distribution.

Research and Development:              Prior to product revenues, base R&D
                                       increasing at 5% a year.

                                       After product launch, 15% of revenues.

Sales, General and Administrative:     Prior to product revenues, base SG&A
                                       increases 3% per year.

                                       After product launch, 5% of revenues.

Taxes:                                 41% of EBIT (35% Federal, 6% California).

                                       NOL benefits are utilized through 2001.


                                       22
<PAGE>

Historical and Projected Financial Statements
================================================================================

Sprint Projections -- Assumptions

Depreciation:                           Equipment                        5 years
                                        Building/Improvements           30 years

Capital Expenditures:(a)                18 Multi-Product Convertible Facilities
                                           -- $9.4 million per facility
                                        2 Double Positive Selection Device 
                                          ("DPSD") Conversions
                                           -- $1.8 million per conversion
                                        2 Multi-Product DPSD Facilities
                                           -- $8.2 million per facility
                                        7 HIV Gene Therapy DPSD Facilities
                                           -- $10.2 million per facility

Working Capital:
        Accounts Receivable:            8.0% of product sales, HIV profit 
                                          distribution and royalties.
        Accounts Payable:               10.0% of operating expenses.

Public Equity Financings:               1997: $23.5 million, $17.00 per share
                                        1998: $47.0 million, $28.00 per share

- ----------
(a)  Capital expenditures include both the cost of building/improvements and
     equipment.


                                       23
<PAGE>





                                 LEHMAN BROTHERS

D
<PAGE>

Discounted Cash Flow Analysis
================================================================================

DCF Results -- Sprint Projections

($ in millions)

<TABLE>
<CAPTION>
                                              Firm Value                                      Value per Share(a)
                                  Yr. 2001 Revenue Terminal Multiples                Yr. 2001 Revenue Terminal Multiples
                               -----------------------------------------          -----------------------------------------
                               5.0x        6.0x        7.0x         8.0x          5.0x        6.0x         7.0x        8.0x
                               ----        ----        ----         ----          ----        ----         ----        ----
Discount Rate

<S>                           <C>         <C>         <C>        <C>            <C>         <C>          <C>         <C>   
   35.0%                      $653.6      $780.0      $906.4     $1,032.8       $43.29      $51.10       $58.90      $66.70

   40.0%                       539.2       644.5       749.9        855.3        36.22       42.73        49.24       55.74

   45.0%                       447.0       535.4       623.8        712.2        30.53       35.99        41.45       46.91

   50.0%                       372.3       446.9       521.5        596.1        25.92       30.52        35.13       39.74
</TABLE>

- ----------
(a)  Equity Value is firm value plus cash and investments of $25.0 and option
     proceeds of $28.4 less total debt of $6.0. Per share calculation assumes
     16,193,150 fully diluted shares.


                                       24
<PAGE>

Discounted Cash Flow Analysis
================================================================================

DCF Valuation Assumptions -- Terminal Multiples Comparison
($ in millions)

<TABLE>
<CAPTION>
                                                       2001 Terminal Multiples
                                         ---------------------------------------------------
                                                              Revenue                 EBIT
                                         Revenues             Multiple              Multiple
                                         --------             --------              --------
<S>                                        <C>                  <C>                 <C>      
Amgen,  Fiscal Year 1990                   $298.7               4.7x                10.9x (a)
Amgen,  Fiscal Year 1991                    682.0               9.8x                24.0x (a)
Amgen,  Fiscal Year 1997 (d)              2,625.1               5.3x                12.6x

<CAPTION>
                                                       2005 Terminal Multiples
                                          --------------------------------------------------
                                            LTM            5-Year Forward           Forward
                                          Multiple          Growth Rate(b)          Multiple
                                          --------          --------------          --------
<S>                                         <C>                 <C>                   <C>  
U.S. Pharmaceutical Company Index (c):                                         
        Revenue Multiples                   4.03x               13.1%                 3.56x
        EBIT Multiples                      18.3x               13.2%                16.17x
Amgen EBIT Multiple (d)                     15.1x               19.8%                 12.6x
</TABLE>

- ----------
(a)  Represents Amgen's respective revenue and EBIT multiple at the low of the
     Company's stock price during 1991 and 1990.
(b)  Five year projected growth rate per Zacks.
(c)  US Pharmaceutical Company Index includes American Home Products, Bristol
     Myers Squibb, Eli Lilly, Merck, Pfizer, Pharmacia & Upjohn, Rhone-Poulenc
     Rorer, Schering Plough and Warner Lambert.
(d)  Represents Amgen's 1997 Revenue and EBIT multiple using revenue projection
     and EBIT projection ($1,109.5 million) by Tony Butler, Lehman Brothers
     Research Analyst. Growth rate is implied by change in EBIT multiple.
     Valuation uses Amgen's current Firm Value of $13,939.1 million as of
     January 3, 1997.


                                       25
<PAGE>

Discounted Cash Flow Analysis
================================================================================

DCF Results -- Sensitivity Case 1
($ in millions)

<TABLE>
<CAPTION>
                                 Firm Value                                Equity Value per share (a)
                      Yr. 2005 EBIT Terminal Multiples                  Yr. 2005 EBIT Terminal Multiples
                     ------------------------------------            -------------------------------------
                      11x           13x             15x               11x            13x             15x
                     ------        ------          ------            ------         ------          ------
Discount Rate

<S>                  <C>           <C>             <C>               <C>            <C>             <C>   
   35.0%             $427.7        $499.7          $571.7            $29.34         $33.79          $38.23

   40.0%              298.7         350.6           402.5             21.37          24.58           27.78

   45.0%              208.2         246.0           283.9             15.78          18.12           20.46

   50.0%              144.1         172.0           199.8             11.82          13.55           15.27
</TABLE>

- ----------
(a)  Equity Value is firm value plus cash and investments of $25.0 and option
     proceeds of $28.4 minus total debt of $6.0. Per share calculation assumes
     16,193,150 fully diluted shares.


                                       26
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Sensitivity Case 1 Adjustments to Sprint Projections -- Eligible Patient
Adjustments

                                    Sensitivity as %
                                       of Sprint
           Sprint Product             Projections             Rationale
- ----------------------------------  ----------------   -------------------------
HSC -- Cancer                            80%           Competitive therapies
                                                       (Centocor - Panorex;
                                                       GeneLabs - MDR;
                                                       Genentech/IDEC -
                                                       non-Hodgkins B-cell
                                                       lymphomas; Genentech -
                                                       breast cancer efforts;
                                                       Vertex - MDR)
                                                    
HSC -- Leukemia                          80%           Competitive therapies
                                                       (See Cancer)
                                                    
HSC -- Autoimmune Disease                20%           Competitive therapies;
                                                       assumption of improved
                                                       long-term treatments
                                                       (Centocor - Rheumatoid
                                                       Arthritis; GeneLabs -
                                                       Lupus focus in Phase
                                                       II/III trials; IDEC -
                                                       Autoimmune disease
                                                       research; LaJolla
                                                       Pharmaceuticals - LJP
                                                       394); possibility that
                                                       Sprint product has
                                                       palliative vs. curative
                                                       results
                                                    
HSC -- Genetic Disease                   80%           Competitive therapies
                                                       from other research
                                                    
HSC -- Genetic Therapy                   60%           Competitive therapies
                                                       that offer opportunity
                                                       for long-term maintenance
                                                    
HSC -- HIV                               40%           Competitive therapies
                                                       that offer opportunity
                                                       for long-term maintenance
                                                    
HSC -- Solid Organ Transplantation       75%           Competitive therapies 
                                                       from other research


                                       27
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Sensitivity Case 1  Assumptions -- Pricing and Margins


      Variable             Assumption                       Rationale

Pricing                70% of projections         o    Assumes increased
                                                       competitive/alternative
                                                       therapies and continued
                                                       reimbursement pressures.
                                                  o    Assumes products are
                                                       highly palliative,
                                                       although not curative, in
                                                       all indications.

Cost of Goods Sold     Same methodology as
                       Sprint projections         o    Adjusts facility
                                                       build-out based on
                                                       minimum required level of
                                                       production per facility.
                                                  o    Fixed costs per facility
                                                       and variable cost
                                                       percentage of production
                                                       are same as projections.

R&D                    15% of revenues            o    Same percentage as Sprint
                                                       projections.
                                                  o    Similar to large
                                                       pharmaceutical companies.

S, G & A               15% of revenues

                                                  o    Increased from 5% of
                                                       revenues in Sprint
                                                       projections.
                                                  o    Larger sales effort
                                                       required in more
                                                       competitive environment.
                                                  o    Based on averages in
                                                       biotechnology and
                                                       pharmaceutical industry.
                                                       Sprint SG&A is lower as
                                                       they do not require
                                                       detail sales force and
                                                       can maximize sales and
                                                       administrative
                                                       efficiencies with
                                                       facilities located near
                                                       metropolitan areas.

Other Variables        Same as Sprint
                       projections


                                       28
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Case Comparison -- Sprint Projection and Sensitivity Case 1

o    Growth Rates and Margins

                                       1998          2001           2005
                                       ----          ----           ----
Revenue Growth
  Projection                            53%          130%            26%
  Sensitivity Case 1                    33%           80%            31%
Manufacturing Expense/Revenue
  Projection                            49%           23%            18%
  Sensitivity Case 1                    51%           32%            30%
R&D/Revenue
  Projection                           115%           15%            15%
  Sensitivity Case 1                   132%           15%            15%
SG&A/Revenue
  Projection                            20%            5%             5%
  Sensitivity Case 1                    23%           15%            15%
Operating Income Margin
  Projection                            NM            57%            62%
  Sensitivity Case 1                    NM            38%            40%


                                       29
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Large Biotechnology Company Operating Statistics
($ in millions)

<TABLE>
<CAPTION>
                                                                            Percent of LTM Revenues
                                                                   ----------------------------------------
                       Market       LTM Revenues     Operating     Gross                          Operating
                        Value                          Profit      Margin      S,G&A     R&D       Margin
                       ------       ------------     ---------     ------      -----     ---      ---------
<S>                   <C>              <C>             <C>           <C>         <C>      <C>        <C>
Amgen                 $15,106.9        $2,159.8        $921.9        87%         21%      24%        43%

Chiron                  3,346.3         1,268.9          88.6        66          31       28          7

Genzyme                 1,992.1           478.1          14.9        60          33       24          3

Mean                       --             --             --          71%         28%      25%        18%
</TABLE>


                                       30
<PAGE>

Discounted Cash Flow Analysis
================================================================================

DCF Results -- Sensitivity Case 2
($ in millions)

<TABLE>
<CAPTION>
                                 Firm Value                              Equity Value per share (a)
                      Yr. 2005 EBIT Terminal Multiples                Yr. 2005 EBIT Terminal Multiples
                     ------------------------------------           ------------------------------------
                      11x            13x            15x              11x            13x            15x
                     ------         ------         ------           ------         ------         ------
Discount Rate
<S>                  <C>            <C>            <C>              <C>            <C>            <C>   
   35.0%             $294.5         $350.4         $406.2           $21.11         $24.56         $28.01

   40.0%              197.5          237.8          278.1            15.13          17.61          20.10

   45.0%              130.2          159.6          189.0            10.97          12.78          14.60

   50.0%               83.1          104.7          126.4             8.06           9.39          10.73
</TABLE>

(a)  Equity Value is firm value plus cash and investments of $25.0 and option
     proceeds of $28.4 minus total debt of $6.0. Per share calculation assumes
     16,193,150 fully diluted shares.


                                       31
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Sensitivity Case 2 Adjustments to Sprint Projections -- Eligible Patient
Adjustments

                                Sensitivity as %
                                   of Sprint
        Sprint Product            Projections             Rationale
- ----------------------------    ---------------  ------------------------------
HSC -- Cancer                        70%         Competitive therapies
                                                 (Centocor - Panorex; GeneLabs
                                                 - MDR; Genentech / IDEC -
                                                 non-Hodgkins B-cell lymphomas;
                                                 Genentech - breast cancer
                                                 efforts; Vertex - MDR)

HSC -- Leukemia                       70%        Competitive therapies (See
                                                 Cancer)

HSC -- Autoimmune Disease             20%        Competitive therapies;
                                                 assumption of improved
                                                 long-term treatments (Centocor
                                                 - Rheumatoid Arthritis;
                                                 GeneLabs - Lupus focus in Phase
                                                 II/III trials; IDEC -
                                                 Autoimmune disease research;
                                                 LaJolla Pharmaceuticals - LJP
                                                 394); possibility that Sprint
                                                 product has palliative vs.
                                                 curative results

HSC -- Genetic Disease                65%        Competitive therapies from
                                                 other research

HSC -- Genetic Therapy                50%        Competitive therapies that
                                                 offer opportunity for long-term
                                                 maintenance

HSC -- HIV                            40%        Competitive therapies that
                                                 offer opportunity for long-term
                                                 maintenance

HSC -- Solid Organ Transplantation    60%        Competitive therapies from
                                                 other research


                                       32
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Sensitivity Case 2 Assumptions -- Pricing and Margins

      Variable                Assumption                   Rationale
- ----------------------   ------------------    --------------------------------
Pricing                  70% of projections    o    Assumes increased
                                                    competitive/alternative
                                                    therapies and continued
                                                    reimbursement pressures.
  
                                               o    Assumes products are highly
                                                    palliative, although not
                                                    curative, in all
                                                    indications.

Cost of Goods Sold       Same methodology as
                         Sprint projections    o    Adjusts facility build-out
                                                    based on minimum required
                                                    level of production per
                                                    facility.

                                               o    Fixed costs per facility and
                                                    variable cost percentage of
                                                    production are same as
                                                    projections.

R&D                      15% of revenues       o    Same percentage as Sprint
                                                    projections. Similar to
                                                    large pharmaceutical
                                                    companies.

S, G & A                 15% of revenues       o    Increased from 5% of
                                                    revenues in Sprint
                                                    projections.

                                               o    Larger sales effort required
                                                    in more competitive
                                                    environment.

                                               o    Based on averages in
                                                    biotechnology and
                                                    pharmaceutical industry.
                                                    Sprint SG&A is lower as they
                                                    do not require detail sales
                                                    force and can maximize sales
                                                    and administrative
                                                    efficiencies with facilities
                                                    located near metropolitan
                                                    areas.

Product Launch Date      Delayed one year      o    Each Product launch delayed
                                                    one year from Sprint
                                                    assumptions based on
                                                    reasonable delays in drug
                                                    development process.


                                       33
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Case Comparison

o    Growth Rates and Margins

                                   1998         2001         2005
                                   ----         ----         ----
Revenue Growth

  Projection                        53%         130%          26%

  Sensitivity Case 2                 8%         109%          31%

Manufacturing Expense/Revenue

  Projection                        49%          23%          18%

  Sensitivity Case 2                25%          38%          31%

R&D/Revenue

  Projection                       115%          15%          15%

  Sensitivity Case 2               163%          15%          15%

SG&A/Revenue

  Projection                        20%           5%           5%

  Sensitivity Case 2                28%          15%          15%

Operating Income Margin

  Projection                        NM           57%          62%

  Sensitivity Case 2                NM           32%          39%


                                       34
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Free Cash Flows -- Sprint Projections
($ in millions)

<TABLE>
<CAPTION>
                          1996       1997      1998       1999       2000        2001      2002     2003        2004         2005
                         ------     ------    -------    -------    ------      ------    ------  --------    --------     --------
<S>                      <C>        <C>        <C>          <C>     <C>         <C>       <C>       <C>       <C>          <C>     
EBIT, After Tax          $(42.4)    $(44.3)    $(40.2)      $3.6    $112.0      $244.8    $412.0    $694.7    $1,078.4     $1,364.9

Working  Capital            0.5        0.4        0.7       (3.3)     (9.5)      (16.2)    (26.9)    (35.3)      (46.0)       (34.1)

Depreciation               10.0       12.3       14.1       12.2      14.8        19.3      24.8      33.8        43.7         53.1

Capital Expenditures       (2.8)     (14.2)     (14.9)     (16.5)    (22.3)      (20.3)    (34.1)    (45.8)      (52.8)       (56.4)
                         ------     ------    -------    -------    ------      ------    ------  --------    --------     --------
Free Cash Flow           $(34.7)    $(45.8)    $(40.3)     $(4.0)    $95.1      $227.6    $375.8    $647.4    $1,023.3     $1,327.5
                         ======     ======    =======    =======    ======      ======    ======  ========    ========     ========
Cumulative Cash Flow     $(34.7)    $(80.5)   $(120.8)   $(124.8)   $(29.7)     $197.9    $573.7  $1,221.1    $2,244.4     $3,571.9
</TABLE>


                                       35
<PAGE>

Discounted Cash Flow Analysis
================================================================================
Free Cash Flows -- Sensitivity Case 1
($ in millions)

<TABLE>
<CAPTION>
                       1996      1997       1998        1999        2000         2001       2002       2003       2004        2005
                      ------    ------     -------     -------     -------      ------      -----     ------     ------      ------
<S>                   <C>       <C>         <C>         <C>           <C>       <C>        <C>        <C>        <C>         <C>   
EBIT, After Tax       $(42.4)   $(44.3)     $(44.6)     $(19.8)       $8.6      $102.4     $157.9     $149.6     $237.1      $316.3
                      
Working Capital          0.5       0.4         1.1        (1.8)       (5.8)      (10.3)      (8.4)     (13.5)     (15.2)      (14.3)
                      
Depreciation            10.0      12.3        14.1        12.2        14.9        16.2       18.5       22.5       26.7        28.8
                      
Capital Expenditures    (2.8)    (14.2)      (14.9)      (16.5)      (22.3)      (15.8)     (23.1)     (26.9)     (23.6)      (20.3)
                      ------    ------     -------     -------     -------      ------      -----     ------     ------      ------
                      
Free Cash Flow        $(34.7)   $(45.8)     $(44.4)     $(25.8)       $4.7       $92.5     $144.7     $131.7     $224.9      $310.6
                      ======    ======     =======     =======     =======      ======      =====     ======     ======      ======
Cumulative Cash Flow  $(34.7)   $(80.5)    $(124.9)    $(150.7)    $(146.0)     $(53.5)     $91.2     $222.9     $447.8      $758.4
</TABLE>


                                       36
<PAGE>

Discounted Cash Flow Analysis
================================================================================

Free Cash Flows -- Sensitivity Case 2
($ in millions)

<TABLE>
<CAPTION>
                        1996        1997        1998       1999       2000        2001       2002       2003       2004       2005
                       ------      ------      ------     ------     ------       -----      -----     ------     ------     ------
<S>                     <C>         <C>         <C>        <C>        <C>          <C>        <C>       <C>        <C>        <C>  
EBIT, After Tax         (42.4)      (44.3)      (39.6)     (46.8)     (39.1)       51.7       92.6      199.3      189.2      245.6

Working Capital           0.5         0.4         1.5       (0.4)      (3.3)      (10.3)      (7.1)     (12.6)     (12.8)     (11.4)

Depreciation             10.0        12.3        14.1       12.2       13.8        15.9       17.7       21.3       24.7       26.9

Capital Expenditures     (2.8)      (14.2)      (14.9)     (16.5)     (22.3)      (14.2)     (20.9)     (24.4)     (20.3)     (15.9)

Free Cash Flow         $(34.7)     $(45.8)     $(38.9)    $(51.5)    $(50.9)      $43.5      $83.2     $183.6     $180.8     $245.2
                       ======      ======      ======     ======     ======       =====      =====     ======     ======     ======
Cumulative Cash Flow   $(34.7)     $(80.5)    $(119.4)   $(170.9)   $(221.8)    $(178.3)    $(95.1)     $88.5     $269.3     $514.5
</TABLE>


                                       37
<PAGE>





                                 LEHMAN BROTHERS

                                       E
<PAGE>

Comparable Transaction Analysis
================================================================================

Comparable Transactions
($ in millions)
                                         Date            Total          Total
Acquiror/Target                       Announced      Equity Value     Firm Value
- -----------------------------------   ---------      ------------     ----------
Bergen Brunswig/
        IVAX(a)                        11/11/96        $1,670.9        $2,073.8

Rhone-Poulenc Rorer/
        Applied Immune Sciences(b)     10/18/95           158.9           121.1

Sandoz AG/
        Genetic Therapy(c)             7/10/95            293.7           237.5

Chiron Corporation/
        Viagene                        4/24/95            106.2            85.4

Ligand Pharmaceuticals./
        Glycomed(d)                     2/7/95             54.2            41.7

CIBA-GEIGY Limited/
        Chiron Corp.(d)                11/21/94         3,443.5         3,601.5

Rhone-Poulenc Rorer, Inc./
        Applied Immune Sciences(e)      6/2/93            247.0           189.5

American Cyanamid Company/
        Immunex Corporation(f)         12/15/92           887.2           877.6

American Home Products/
        Genetics Institute.            8/20/91          1,089.9           677.8

- ----------
(a)  Ivax had 4.012149 million options outstanding with an average exercise
     price of $18.43 that are all out of the money. The acquisition was for 0.42
     Bergen shares per Ivax share. All quarterly write offs are adjusted from
     LTM figures.

(b)  Rhone-Poulenc Rorer paid cash for the remaining 53% of AIS that it didn't
     already own for $11.75/share.

(c)  Sandoz paid cash for the remaining 96% of Genetic Therapy it did not own
     for $21.00/share.

(d)  Offer price per share calculated with 2/6/95 closing price of $8.00 and
     EXCHANGE ratio of 0.5301 shares of Ligand for 1 share of Glycomed.

(e)  Consideration per share taken as a weighted average of $117.00/share for
     37.3% of the outstanding shares and 1/4/95 closing price of $61.50 for the
     remaining 62.7% (which takes into account the 6.6mm shares issued to CIBA).

(f)  RPR acquired 37.2% of AIS for total proceeds of approx. $113mm. RPR has the
     option to purchase up to an additional 6mm shares of newly issued shares
     through 1/1/97 for a minimum total exercise price of $134mm.

(g)  ACY purchased 53.5% of Immunex for $350mm + contribution of some of its
     North American Oncology Business. Transaction price based on 12/16/92
     close.


                                       38
<PAGE>

Comparable Transaction Analysis
================================================================================

Premiums Paid

                                    Premium to Stock Price Prior to Announcement
                                    --------------------------------------------
                                       One         30        52-Week     52-Week
Acquiror/Target                        Day        Days        High         Low
- -------------------------------     --------    --------    ---------   --------
Bergen Brunswig/
        IVAX                         (13.4%)     (11.3%)     (54.9%)        5.8%

Rhone-Poulenc Rorer/
        Applied Immune Sciences       67.9        46.9         1.9        184.8

Sandoz AG/
        Genetic Therapy               37.7        95.3        37.7        250.0

Chiron Corporation/
        Viagene                       67.4        46.9         5.1        166.7

Ligand Pharmaceuticals/
        Glycomed                      33.0        41.4       (41.5)       126.2

CIBA-GEIGY Limited/
        Chiron Corp.                  37.6        32.1       245.7        533.8

Rhone-Poulenc Rorer/
        Applied Immune Sciences       38.3        75.2        22.2        133.6

American Cyanamid Company/
        Immunex Corporation           14.0        (4.9)      (22.1)       122.5

American Home Products/
        Genetics Institute            17.9        23.3       (36.8)        37.5

- --------------------------------------------------------------------------------
Mean                                  33.4%       38.3%       17.5%       172.3%
Median                                37.6        41.4         1.9        133.6
Hi                                    67.9        95.3       245.7        533.8
Low                                  (13.4)      (11.3)      (54.9)         5.8
- --------------------------------------------------------------------------------


                                       39
<PAGE>

Comparable Transaction Analysis
================================================================================

Purchase Price Premium Analysis

<TABLE>
<CAPTION>

Proposed Offer                                                              $19.50
                                                              ----------------------------------
Premium to:                                                   As of 1/3/97         As of 5/23/96
                                                              ------------         -------------
<S>                                                               <C>                  <C>  
Pre-Announcement Price of $15.06 and $11.00, respectively         29.5%                77.3%

Previous 30-Day Price of $14.50 and $12.88, respectively          34.5%                51.5%

Previous 52-Week Price of $15.88 and $12.75, respectively         22.8%                52.9%

52-Week High of $18.63 and $16.75, respectively(a)                 4.7%                16.4%

52-Week Low of $11.00(b)                                          77.3%                77.3%
</TABLE>

- ----------
(a)  52-Week high closing price occurred on 5/24/96 and 1/5/96, receptively.
(b)  52-week low closing price occurred on 5/23/96 for both time periods.


                                       40
<PAGE>





                                 LEHMAN BROTHERS

                                       III
<PAGE>

Alternative Financing Environment


Relative Performance of Biotechnology Companies 5/1/96 to 1/3/97

[The following table was represented as a line graph in the printed material.]

<TABLE>
<CAPTION>
                                                                          Gene and Cell Therapy 
                          S&P 400             AMEX Biotech Index (a)            Comps (b)
                    --------------------      ---------------------       -------------------
<S>                 <C>          <C>          <C>           <C>           <C>         <C>    
       5/1/96       777.625      100.00%      152.375       100.00%       12.568      100.00%
       5/2/96       766.031       98.51%      147.906        97.07%       12.467       99.20%
       5/3/96       764.406       98.30%      148.250        97.29%       12.538       99.77%
       5/6/96       764.125       98.26%      148.469        97.44%       12.910      102.72%
       5/7/96       760.156       97.75%      147.094        96.53%       12.764      101.56%
       5/8/96       765.719       98.47%      147.375        96.72%       12.595      100.21%
       5/9/96       766.438       98.56%      148.563        97.50%       12.950      103.04%
      5/10/96       772.875       99.39%      149.781        98.30%       13.344      106.18%
      5/13/96       785.250      100.98%      152.094        99.82%       13.782      109.66%
      5/14/96       790.938      101.71%      153.688       100.86%       13.818      109.95%
      5/15/96       791.469      101.78%      149.188        97.91%       14.032      111.65%
      5/16/96       791.281      101.76%      152.250        99.92%       14.328      114.00%
      5/17/96       796.188      102.39%      155.000       101.72%       14.446      114.94%
      5/20/96       802.469      103.19%      156.656       102.81%       14.265      113.50%
      5/21/96       800.750      102.97%      155.438       102.01%       13.697      108.99%
      5/22/96       806.719      103.74%      156.125       102.46%       13.663      108.72%
      5/23/96       805.000      103.52%      157.938       103.65%       13.769      109.56%
      5/24/96       807.313      103.82%      157.719       103.51%       14.698      116.95%
      5/27/96       807.313      103.82%      157.719       103.51%       14.698      116.95%
      5/28/96       800.094      102.89%      157.094       103.10%       14.481      115.22%
      5/29/96       794.875      102.22%      154.469       101.37%       14.397      114.55%
      5/30/96       800.844      102.99%      156.438       102.67%       14.433      114.84%
      5/31/96       798.281      102.66%      155.656       102.15%       14.603      116.19%
       6/3/96       796.906      102.48%      155.594       102.11%       14.779      117.60%
       6/4/96       801.969      103.13%      156.000       102.38%       14.784      117.63%
       6/5/96       807.875      103.89%      153.969       101.05%       14.769      117.52%
       6/6/96       801.000      103.01%      154.750       101.56%       14.760      117.44%
       6/7/96       803.531      103.33%      152.750       100.25%       14.704      117.00%
      6/10/96       802.469      103.19%      152.719       100.23%       14.984      119.23%
      6/11/96       800.938      103.00%      152.719       100.23%       15.046      119.72%
      6/12/96       799.313      102.79%      151.781        99.61%       14.790      117.68%
      6/13/96       797.219      102.52%      149.750        98.28%       14.667      116.70%
      6/14/96       794.375      102.15%      148.688        97.58%       14.423      114.76%
      6/17/96       793.531      102.05%      146.375        96.06%       14.196      112.96%
      6/18/96       788.875      101.45%      141.625        92.95%       13.740      109.33%
      6/19/96       789.375      101.51%      135.500        88.93%       13.585      108.09%
      6/20/96       790.000      101.59%      134.563        88.31%       13.463      107.12%
      6/21/96       796.094      102.38%      135.188        88.72%       13.598      108.20%
      6/24/96       798.031      102.62%      137.875        90.48%       13.441      106.95%
      6/25/96       796.813      102.47%      138.875        91.14%       13.549      107.81%
      6/26/96       791.375      101.77%      134.656        88.37%       13.364      106.34%
      6/27/96       794.969      102.23%      134.156        88.04%       13.116      104.36%
      6/28/96       796.375      102.41%      140.688        92.33%       13.404      106.65%
       7/1/96       802.219      103.16%      140.344        92.10%       13.099      104.22%
       7/2/96       799.531      102.82%      137.219        90.05%       12.844      102.20%
       7/3/96       797.781      102.59%      135.000        88.60%       12.604      100.29%
       7/4/96       797.781      102.59%      135.000        88.60%       12.604      100.29%
       7/5/96       781.781      100.53%      131.344        86.20%       12.379       98.50%
       7/8/96       776.938       99.91%      128.719        84.47%       12.150       96.67%
       7/9/96       778.719      100.14%      129.219        84.80%       12.367       98.40%
      7/10/96       779.781      100.28%      125.531        82.38%       11.781       93.74%
      7/11/96       767.063       98.64%      119.125        78.18%       11.576       92.11%
      7/12/96       766.563       98.58%      120.281        78.94%       11.883       94.55%
      7/15/96       745.656       95.89%      113.844        74.71%       11.163       88.82%
      7/16/96       743.719       95.64%      112.469        73.81%       10.863       86.44%
      7/17/96       751.125       96.59%      119.781        78.61%       11.285       89.79%
      7/18/96       762.469       98.05%      124.813        81.91%       11.803       93.91%
      7/19/96       757.063       97.36%      122.250        80.23%       11.713       93.20%
      7/22/96       750.781       96.55%      116.625        76.54%       11.692       93.03%
      7/23/96       741.281       95.33%      112.719        73.97%       11.142       88.65%
      7/24/96       740.969       95.29%      111.781        73.36%       10.875       86.53%
      7/25/96       746.625       96.01%      114.438        75.10%       11.152       88.73%
      7/26/96       752.781       96.81%      116.594        76.52%       11.697       93.07%
      7/29/96       746.563       96.01%      114.031        74.84%       11.596       92.27%
      7/30/96       751.688       96.66%      113.469        74.47%       11.579       92.14%
      7/31/96       757.938       97.47%      116.188        76.25%       11.788       93.80%
       8/1/96       769.563       98.96%      116.531        76.48%       11.872       94.46%
       8/2/96       783.031      100.70%      119.969        78.73%       12.056       95.93%
       8/5/96       781.219      100.46%      118.094        77.50%       11.772       93.67%
       8/6/96       784.469      100.88%      117.156        76.89%       11.868       94.43%
       8/7/96       786.750      101.17%      118.688        77.89%       11.741       93.42%
       8/8/96       784.281      100.86%      120.250        78.92%       11.481       91.35%
       8/9/96       782.813      100.67%      120.563        79.12%       11.486       91.39%
      8/12/96       786.938      101.20%      120.469        79.06%       11.406       90.76%
      8/13/96       780.469      100.37%      121.094        79.47%       11.055       87.97%
      8/14/96       782.594      100.64%      122.969        80.70%       11.138       88.62%
      8/15/96       782.969      100.69%      121.625        79.82%       11.070       88.08%
      8/16/96       785.156      100.97%      121.406        79.68%       11.169       88.87%
      8/19/96       786.531      101.15%      120.406        79.02%       11.155       88.76%
      8/20/96       785.125      100.96%      120.406        79.02%       11.071       88.09%
      8/21/96       784.313      100.86%      122.188        80.19%       10.830       86.18%
      8/22/96       791.156      101.74%      125.750        82.53%       11.057       87.98%
      8/23/96       787.469      101.27%      126.281        82.88%       11.141       88.64%
      8/26/96       783.688      100.78%      126.719        83.16%       11.100       88.32%
      8/27/96       783.688      100.78%      128.875        84.58%       10.953       87.16%
      8/28/96       785.344      100.99%      132.000        86.63%       10.984       87.40%
      8/29/96       776.531       99.86%      130.125        85.40%       11.489       91.42%
      8/30/96       770.375       99.07%      128.625        84.41%       11.429       90.94%
       9/2/96       770.375       99.07%      128.625        84.41%       11.429       90.94%
       9/3/96       774.063       99.54%      128.313        84.21%       11.254       89.55%
       9/4/96       775.594       99.74%      127.594        83.74%       11.059       87.99%
       9/5/96       768.250       98.79%      124.219        81.52%       10.819       86.09%
       9/6/96       775.469       99.72%      127.375        83.59%       11.141       88.65%
       9/9/96       784.781      100.92%      128.688        84.45%       11.292       89.85%
      9/10/96       785.094      100.96%      128.188        84.13%       11.201       89.13%
      9/11/96       788.750      101.43%      127.625        83.76%       11.031       87.77%
      9/12/96       793.250      102.01%      129.969        85.30%       11.082       88.18%
      9/13/96       804.094      103.40%      131.531        86.32%       11.081       88.17%
      9/16/96       808.500      103.97%      130.844        85.87%       11.289       89.83%
      9/17/96       808.719      104.00%      129.188        84.78%       11.214       89.23%
      9/18/96       807.563      103.85%      127.531        83.70%       11.087       88.22%
      9/19/96       810.063      104.17%      125.219        82.18%       11.073       88.11%
      9/20/96       814.656      104.76%      127.344        83.57%       11.063       88.02%
      9/23/96       813.219      104.58%      127.344        83.57%       10.823       86.11%
      9/24/96       812.031      104.42%      128.875        84.58%       10.867       86.46%
      9/25/96       812.125      104.44%      135.250        88.76%       11.292       89.85%
      9/26/96       811.219      104.32%      137.688        90.36%       11.625       92.50%
      9/27/96       811.125      104.31%      139.125        91.30%       11.782       93.74%
      9/30/96       812.844      104.53%      140.031        91.90%       11.534       91.78%
      10/1/96       814.000      104.68%      138.281        90.75%       11.385       90.59%
      10/2/96       819.781      105.42%      139.156        91.32%       11.876       94.49%
      10/3/96       818.438      105.25%      139.656        91.65%       11.743       93.44%
      10/4/96       827.813      106.45%      141.469        92.84%       11.410       90.79%
      10/7/96       830.688      106.82%      139.219        91.37%       11.210       89.20%
      10/8/96       827.344      106.39%      138.594        90.96%       11.006       87.58%
      10/9/96       822.875      105.82%      137.219        90.05%       10.999       87.52%
     10/10/96       820.813      105.55%      138.469        90.87%       11.139       88.64%
     10/11/96       828.063      106.49%      140.250        92.04%       11.426       90.92%
     10/14/96       831.906      106.98%      140.844        92.43%       11.409       90.78%
     10/15/96       830.625      106.82%      139.063        91.26%       11.442       91.04%
     10/16/96       833.469      107.18%      137.281        90.09%       11.640       92.62%
     10/17/96       835.406      107.43%      136.438        89.54%       11.519       91.65%
     10/18/96       839.563      107.96%      137.844        90.46%       11.630       92.54%
     10/21/96       837.219      107.66%      137.281        90.09%       11.449       91.10%
     10/22/96       833.813      107.23%      133.000        87.28%       11.324       90.10%
     10/23/96       834.219      107.28%      133.313        87.49%       11.105       88.36%
     10/24/96       827.719      106.44%      134.625        88.35%       11.233       89.38%
     10/25/96       825.219      106.12%      134.469        88.25%       11.322       90.09%
     10/28/96       820.688      105.54%      132.531        86.98%       11.071       88.09%
     10/29/96       823.906      105.95%      129.719        85.13%       10.295       81.92%
     10/30/96       821.656      105.66%      131.281        86.16%       10.357       82.41%
     10/31/96       826.656      106.31%      132.563        87.00%       10.467       83.29%
      11/1/96       825.375      106.14%      130.156        85.42%       10.285       81.84%
      11/4/96       828.313      106.52%      126.969        83.33%       10.314       82.07%
      11/5/96       836.531      107.58%      128.438        84.29%       10.343       82.30%
      11/6/96       849.750      109.28%      133.094        87.35%       10.422       82.93%
      11/7/96       853.719      109.79%      132.750        87.12%       10.409       82.82%
      11/8/96       858.094      110.35%      134.969        88.58%       10.488       83.45%
     11/11/96       860.094      110.61%      134.031        87.96%       10.557       84.00%
     11/12/96       856.844      110.19%      132.500        86.96%       10.661       84.83%
     11/13/96       859.531      110.53%      133.375        87.53%       10.868       86.48%
     11/14/96       864.688      111.20%      131.469        86.28%       10.951       87.14%
     11/15/96       866.656      111.45%      129.938        85.27%       10.736       85.42%
     11/18/96       865.313      111.28%      127.531        83.70%       10.486       83.43%
     11/19/96       870.688      111.97%      128.656        84.43%       10.631       84.59%
     11/20/96       872.625      112.22%      128.375        84.25%       10.671       84.91%
     11/21/96       871.750      112.10%      130.875        85.89%       10.946       87.09%
     11/22/96       878.531      112.98%      133.219        87.43%       11.424       90.90%
     11/25/96       886.906      114.05%      132.313        86.83%       11.161       88.81%
     11/26/96       885.969      113.93%      132.531        86.98%       11.289       89.82%
     11/27/96       884.500      113.74%      132.813        87.16%       11.601       92.31%
     11/28/96       884.500      113.74%      132.813        87.16%       11.601       92.31%
     11/29/96       886.625      114.02%      134.875        88.52%       12.379       98.50%
      12/2/96       887.500      114.13%      135.313        88.80%       12.245       97.43%
      12/3/96       878.281      112.94%      140.750        92.37%       13.017      103.58%
      12/4/96       875.156      112.54%      140.094        91.94%       12.306       97.91%
      12/5/96       875.375      112.57%      142.531        93.54%       12.422       98.84%
      12/6/96       868.469      111.68%      141.844        93.09%       12.317       98.00%
      12/9/96       881.438      113.35%      144.219        94.65%       11.942       95.02%
     12/10/96       878.219      112.94%      143.250        94.01%       11.988       95.39%
     12/11/96       871.344      112.05%      141.469        92.84%       11.713       93.20%
     12/12/96       859.188      110.49%      139.063        91.26%       11.097       88.30%
     12/13/96       857.469      110.27%      137.375        90.16%       11.846       94.25%
     12/16/96       847.688      109.01%      135.875        89.17%       11.794       93.84%
     12/17/96       852.000      109.56%      137.531        90.26%       11.670       92.86%
     12/18/96       860.125      110.61%      143.063        93.89%       11.847       94.27%
     12/19/96       875.594      112.60%      146.219        95.96%       12.111       96.36%
     12/20/96       878.094      112.92%      145.625        95.57%       12.193       97.02%
     12/23/96       876.344      112.69%      142.844        93.74%       11.596       92.27%
     12/24/96       881.219      113.32%      143.438        94.13%       11.743       93.44%
     12/25/96       881.219      113.32%      143.438        94.13%       11.743       93.44%
     12/26/96       887.031      114.07%      143.781        94.36%       11.987       95.38%
     12/27/96       887.938      114.19%      143.406        94.11%       12.010       95.56%
     12/30/96       883.844      113.66%      143.563        94.22%       11.747       93.47%
     12/31/96       869.969      111.88%      144.313        94.71%       11.815       94.01%
       1/1/97       869.969      111.88%      144.313        94.71%       11.815       94.01%
       1/2/97       866.906      111.48%      142.188        93.31%       11.754       93.53%
       1/3/97       880.281      113.20%      144.563        94.87%       11.980       95.32%
</TABLE>

- ----------
(a)  AMEX Biotech Index includes AMGN, BGEN, CEPH, CGNE, CHIR, CNTO, CORR, GENZ,
     GILD, IMNR, LIPO, ORG, PDLI, VRTX.
(b)  Gene and Cell Therapy Comps include GMED, RZYM, SOMA, TGEN, VICL, CEGE,
     CPRO.


                                       41
<PAGE>

Alternative Financing Environment
================================================================================

Large Biotechnology Company Stock Performance 5/1/96 to 1/3/97


Company                   May 1, 1996      January 3, 1997      % Change
- ----------------          -----------      ---------------      --------
Amgen                        $57.50             $57.13            (0.7%)

Centocor                     $39.13             $35.00           (10.5%)

Chiron                       $24.63             $19.68           (20.1%)

Genzyme Corp.(a)             $27.88             $23.50           (15.7%)

- ----------
(a)  Genzyme represents General Division Common Stock (GENZ).


                                       42
<PAGE>

Alternative Financing Environment
================================================================================

Completed Biotechnology Initial Public Offerings(1)

July 1, 1996 to January 3, 1997
($ in millions, except per share data)

<TABLE>
<CAPTION>
                                               Original   Original    Total(2)                          Offer to    Offered
                                                Shares      File       Shares                           Midpoint     Shares
 Filing     Issue                               Filed       Price     Offered      Offer     Offer      of Filing   to Filed
  Date      Date             Issuer              (MM)       (MM)        (MM)       Price     Amount       Range      Shares
- -------   --------  ------------------------   --------   --------    -------      -----     ------     ---------   --------
<C>       <C>       <C>                          <C>        <C>         <C>        <C>       <C>         <C>        <C>  
5/21/96   7/10/96   Maxim Pharmaceuticals        2.00       $7.50       2.50       $7.60     $19.00        1.3%       25.0%
5/24/96   7/17/96   Cadus Pharmaceutical         2.75       11.50       2.75        7.00      19.25      (39.1%)       0.0%
6/11/96   7/3096    Geron Corp                   2.50       12.00       2.00        8.00      16.00      (33.3%)     (20.0%)
8/29/96   10/15/96  ArQule, Inc.                 2.00       12.00       2.50       12.00      30.00        0.0%       25.0%
8/27/96   10/16/96  Transkaryotic Therapies      2.50       14.00       2.50       15.00      37.50        7.1%        0.0%
6/25/96   10/26/96  Cubist Pharmaceuticals       2.50       14.00       2.50       15.00      37.50        7.1%        0.0%
6/5/96    11/5/96   Aviron                       3.00       12.00       2.00        8.00      16.00      (33.3%)     (33.3%)
9/20/96   11/19/96  ViroPharma                   2.25       12.00       2.25        7.00      15.75      (41.7%)       0.0%
                                                                                                      
                                              --------------------------------------------------------------------------------
                                              Mean                                                       (16.5%)       0.4%
                                              Median                                                     (16.7%)       0.0%
                                              High                                                         7.1%       25.0%
                                              Low                                                        (41.7%)     (33.3%)
                                              --------------------------------------------------------------------------------
</TABLE>

- ----------
(1)  Excludes unit offerings and shelf-registrations.
(b)  Excludes over-allotment option.


                                       43
<PAGE>

Alternative Financing Environment
================================================================================

Completed Biotechnology Public Equity Follow-on Offerings(1)

July 1, 1996 to January 3, 1997
($ in millions, except per share data)

<TABLE>
<CAPTION>
                                              Price    Original                Total                                     Offered
                                             One Day    Shares    Original    Shares                           Offer    Shares to
 Filing     Issue                            Prior to    Filed      File      Offered     Offer     Offer    Price to     Filed
  Date      Date            Issuer            Filing     (MM)       Price      (MM)       Price     Amount   Pre-File    Shares
- --------   -------  ----------------------   --------  --------   --------    -------     -----     ------   --------   ---------
<S>        <C>      <C>                        <C>       <C>       <C>         <C>        <C>        <C>      <C>        <C>    
 5/26/96    7/2/96  La Jolla                   $7.50     3.00      $7.00       2.00       $4.19      $8.38    (44.2%)    (33.3%)
                    Pharmaceutical                                                      
 6/10/96    7/3/96  Creative Biomolecules       9.50     2.00       7.31       2.00        7.00      14.00    (26.3%)      0.0%
 6/21/96   7/25/96  Agouron Pharmaceuticals    40.00     2.50      39.25       2.50       30.00      75.00    (25.0%)      0.0%
 6/12/96   7/30/96  Genzyme Transgenics         8.44     3.00       8.13       3.00        4.00      12.00    (52.6%)      0.0%
  7/3/96    8/8/96  Vertex Pharmaceuticals     33.00     3.00      33.00       3.00       24.00      72.00    (27.3%)      0.0%
 6/28/96    8/9/96  Anergen, Inc.               4.63     4.00       4.63       3.50        3.00      10.50    (35.1%)    (12.5%)
 7/18/96    8/9/96  Ergo Science               16.38     2.50      16.75       2.50       12.25      30.63    (25.2%)      0.0%
 7/23/96   8/26/96  T Cell Sciences             2.75     5.00       2.94       5.00        2.19      10.94    (20.4%)      0.0%
 6/28/96   9/25/96  BioCryst                   16.75     2.00      17.00       2.00       10.00      20.00    (40.3%)      0.0%
                    Pharmaceuticals                                                     
 9/25/96  10/24/96  Ligand Pharmaceuticals     14.75     2.75      14.75       2.75       12.00      33.00    (18.6%)      0.0%
10/15/96  10/25/96  SUGEN                      13.88     2.00      13.88       2.00       12.00      24.00    (13.5%)      0.0%
  6/6/96  10/28/96  Immune Response            12.75     2.50      12.38       2.20        6.50      14.30    (49.0%)    (12.0%)
10/15/96   11/1/96  Amylin Pharmaceuticals     13.50     1.50      13.00       1.75       10.00      17.50    (25.9%)     16.7%
                                                                                        
                                                       ---------------------------------------------------------------------------
                                                       Mean                                                   (31.0%)     (3.2%)
                                                       Median                                                 (26.3%)      0.0%
                                                       High                                                   (13.5%)     16.7%
                                                       Low                                                    (52.6%)    (33.3%)
                                                       ---------------------------------------------------------------------------
</TABLE>

- ----------
(1)  Excludes unit offerings and shelf-registrations.


                                       44
<PAGE>

Alternative Financing Environment
================================================================================

Impact from Equity Financing

o    Assume Sprint needs to finance $140 million

<TABLE>
<CAPTION>
                                                                                                          Proceeds      Post-Money
                                                               Shares      Assumed        Proceeds       Including      Valuation
       Financing Year                                        (Millions)     Price        (Millions)      Rights(b)     (Millions)(c)

       <S>                                                      <C>          <C>            <C>            <C>            <C> 
       1997                                                     3.0          $11            $30            $110           $210

       1998                                                     3.0           15             40             150            332

       1999                                                     3.0           25             70             260            628
                                                                ---                        ----            ----
               Total                                            9.0                        $140            $520
                                                                ===                        ====            ====

       ----------------------------------------------------------------------------------------------------------------------------
       2005 Net Income (a)                                                               $1,365          $1,365
       EPS Current Shares, Fully Diluted (16.2)                                           84.26           84.26
       EPS Post Financing and New Options (27.2 and 58.4)(d)                              50.18           23.38
               Difference                                                                   (40%)         (72.3%)
       ----------------------------------------------------------------------------------------------------------------------------
</TABLE>

- ----------
(a) Per the Company's projections.
(b) Refers to Hurdle's Top-up Rights. Per the Stock Warrant Purchase Agreement,
January 30, 1995, Hurdle has Top-Up rights to maintain their fully diluted
ownership position of 71.6% (assuming Hurdle's 1.4 million warrants are not
exercised at $27.50 per share.
(c) Excludes Hurdle's Top-up rights.
(d) Assumes 2 million additional, future options issued and outstanding in 2005,
resulting in 27.2 million and 58.4 million fully diluted shares outstanding for
the scenarios without Top-up Rights and with Top-up Rights, respectively.
Hurdle's fully diluted ownership assumed to be 71.6%.


                                       45
<PAGE>





                                 LEHMAN BROTHERS

Exhibit I
<PAGE>

Exhibits
================================================================================

A.   Comparable Company Analysis

     1.   Large Capitalization Biotechnology Companies

     2.   U.S. Pharmaceutical Companies

     3.   Gene Therapy / Cell Therapy Companies

B.   Discounted Cash Flow Analysis

     1.   Sprint Projections - Management Case

     2.   Sensitivity Analysis 1 - Base Case

     3.   Sensitivity Analysis 2 - Conservative Case

C.   Comparable Transaction Analysis

D.   Summary of Recent Biotechnology Equity Offerings


                                       46
<PAGE>


                                LEHMAN BROTHERS

          A

<PAGE>

                                                                 LEHMAN BROTHERS
                                                                          1/3/97
- --------------------------------------------------------------------------------
                  COMPARABLE COMPANY TRADING MULTIPLES ANALYSIS
                  LARGE CAPITALIZATION BIOTECHNOLOGY COMPANIES
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                    LATEST TWELVE MONTH OPERATING RESULTS
                                         -------------------------------------------------------------------------------------------
COMPANY NAME          LTM                 GROSS     GROSS             SG&A AS            R&D AS                EBIT                 
  (TICKER)           ENDING     SALES     PROFIT    MARGIN    SG&A    % SALES     R&D    % SALES    EBIT      MARGIN    EBITDA      
- ------------         ------     -----     ------    ------    ----    -------     ---    -------    ----      ------    ------      
<S>                  <C>       <C>       <C>         <C>      <C>       <C>      <C>       <C>      <C>        <C>      <C>         
Amgen                9/30/96   2,159.8   1,885.9     87.3%    455.4     21.1%    508.6     23.5%    921.9      42.7%    1,021.7     
  (AMGN)                                                                                                                            
                                                                                                                                    
                                                                                                                                    
Biogen               9/30/96     225.8     204.6     90.6%     66.8     29.6%    107.3     47.5%     30.5      13.5%       44.8     
  (BGEN)                                                                                                                            
                                                                                                                                    
                                                                                                                                    
Centocor             9/30/96     106.7      58.7     55.1%     32.4     30.4%     58.4     54.7%    (32.1)       NM       (17.8)    
  (CNTO)                                                                                                                            
                                                                                                                                    
                                                                                                                                    
Chiron               9/30/96   1,268.9     837.5     66.0%    399.0     31.4%    349.9     27.6%     88.6       7.0%      202.0     
  (CHIR)                                                                                                                            
                                                                                                                                    
                                                                                                                                    
Genentech            9/30/96   1,003.6     903.3     90.0%    239.2     23.8%    438.0     43.6%    226.1      22.5%      287.0     
  (GNE)                                                                                                                             
                                                                                                                                    
                                                                                                                                    
Genetics Institute   9/30/96     244.7     199.6     81.6%     28.9     11.8%    139.3     56.9%     31.5      12.9%       47.8     
  (GENIZ)                                                                                                                           
                                                                                                                                    
                                                                                                                                    
Genzyme Corp.        9/30/96     478.1     286.5     59.9%    157.8     33.0%    113.8     23.8%     14.9       3.1%       41.5     
  (GENZ), (GENZL)                                                                                                                   
                                                                                                                                    
                                                                                                                                    
Immunex              9/30/96     157.6     135.1     85.7%     68.4     43.4%     93.6     59.4%    (27.0)       NM       (11.6)    
  (IMNX)                                                                                                                            

All Companies
    High                                             90.6%              43.4%              59.4%               42.7%                
    Mean                                             77.0%              28.1%              42.1%               16.9%                
    Median                                           83.6%              30.0%              45.6%               13.2%                
    Low                                              55.1%              11.8%              23.5%               3.1%                 
====================================================================================================================================
Amgen, Chiron, Genzyme
    High                                             87.3%              33.0%              27.6%               42.7%                
    Mean                                             71.1%              28.5%              25.0%               17.6%                
    Median                                           66.0%              31.4%              23.8%               7.0%                 
    Low                                              59.9%              21.1%              23.5%               3.1%                 
====================================================================================================================================
</TABLE>


                      LATEST TWELVE MONTH OPERATING RESULTS
                     ---------------------------------------
COMPANY NAME         EBITDA     NET
  (TICKER)           MARGIN    INCOME
- ------------         ------    ------
Amgen                 47.3%     647.4
  (AMGN)                    
                              
                              
Biogen                19.8%      33.3
  (BGEN)                    
                              
                              
Centocor                NM      (35.8)
  (CNTO)                    
                              
                              
Chiron                15.9%      57.5
  (CHIR)                    
                              
                              
Genentech             28.6%     141.3
  (GNE)                     
                              
                              
Genetics Institute    19.5%      26.0
  (GENIZ)                   
                              
                              
Genzyme Corp.          8.7%      (0.8)
  (GENZ), (GENZL)           
                              
                              
Immunex                 NM      (25.3)
  (IMNX)                    

All Companies
    High              47.3%
    Mean              23.3%
    Median            19.7%
    Low                8.7%
=====================================
Amgen, Chiron, Genzym
    High              47.3%
    Mean              24.0%
    Median            15.9%
    Low                8.7%
=====================================

<PAGE>

                                                                 LEHMAN BROTHERS
                                                                          1/3/97
- --------------------------------------------------------------------------------
                  COMPARABLE COMPANY TRADING MULTIPLES ANALYSIS
                  LARGE CAPITALIZATION BIOTECHNOLOGY COMPANIES
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                 MARKET VALUE AS A                           
                                                   MULTIPLE OF:                              
                          -------------------------------------------------------------      
COMPANY NAME               LTM         1996A         1997E         1998E          BOOK       
  (TICKER)                 EPS          EPS           EPS           EPS           VALUE      
- ------------              -----        -----         -----         -----          -----      
<S>                       <C>          <C>           <C>           <C>             <C>       
Amgen                     25.1x        23.6x         20.5x         17.7x           8.5x      
  (AMGN)

Biogen                    84.7x        62.1x         30.3x         18.7x           6.0x      
  (BGEN)

Centocor                   NM            NM          63.6x         28.2x          10.4x      
  (CNTO)

Chiron                    59.7x        63.3x         43.6x         32.2x           4.5x      
  (CHIR)

Genentech                 46.6x        51.9x         66.0x         65.2x           3.6x      
  (GNE)

Genetics Institute        95.4x        67.3x         54.7x         38.5x           4.9x      
  (GENIZ)

Genzyme Corp.              NM          21.0x         18.2x         15.5x           2.3x      
  (GENZ), (GENZL)

Immunex                    NM            NM           NM            NM             4.5x      
  (IMNX)


All Companies
  High                    95.4x        67.3x         66.0x         65.2x          10.4x      
  Mean                    62.3x        48.2x         42.4x         30.9x           5.6x      
  Median                  59.7x        57.0x         43.6x         28.2x           4.7x      
  Low                     25.1x        21.0x         18.2x         15.5x           2.3x      
=============================================================================================
Amgen, Chiron, Genzyme
  High                    59.7x        63.3x         43.6x         32.2x           8.5x      
  Mean                    42.4x        36.0x         27.4x         21.8x           5.1x      
  Median                  42.4x        23.6x         20.5x         17.7x           4.5x      
  Low                     25.1x        21.0x         18.2x         15.5x           2.3x      
=============================================================================================
                           
<CAPTION>
                                      MARKET VALUE + DEBT - CASH  
                                          AS A MULTIPLE OF:                  1996E P/E
                           ----------------------------------------------        VS.  
COMPANY NAME                LTM          LTM            LTM       ASSETS-      GROWTH
  (TICKER)                  REV.         EBIT          EBITDA      CASH         RATE
- ------------               ----          ----          ------     -------   ----------
<S>                         <C>          <C>            <C>        <C>          <C>  
Amgen                       6.45x        15.1x          13.6x      8.96x        1.36x
  (AMGN)                                                          
                                                                  
Biogen                     10.86x          NM            NM        8.04x        2.01x
  (BGEN)                                                          
                                                                  
Centocor                   20.86x          NM            NM       12.49x          NA
  (CNTO)                                                          
                                                                  
Chiron                      2.90x        41.5x          18.2x      2.34x        2.19x
  (CHIR)                                                          
                                                                  
Genentech                   5.71x        25.3x          20.0x      3.81x        3.30x
  (GNE)                                                           
                                                                  
Genetics Institute          8.53x          NM           43.6x      9.73x        3.83x
  (GENIZ)                                                         
                                                                  
Genzyme Corp.               3.69x          NM           42.5x      1.75x        1.00x
  (GENZ), (GENZL)                                                 
                                                                  
Immunex                     4.56x          NM            NM        4.55x          NA
  (IMNX)                                                          
                                                                  
                                                                  
All Companies                                                     
  High                     20.86x        41.5x          43.6x     12.49x        3.83x
  Mean                      7.94x        27.3x          27.6x      6.46x        2.28x
  Median                    6.08x        25.3x          20.0x      6.30x        2.10x
  Low                       2.90x        15.1x          13.6x      1.75x        1.00x
=====================================================================================
Amgen, Chiron, Genzyme                                            
  High                      6.45x        41.5x          42.5x      8.96x        2.19x
  Mean                      4.35x        28.3x          24.8x      4.35x        1.52x
  Median                    3.69x        28.3x          18.2x      2.34x        1.36x
  Low                       2.90x        15.1x          13.6x      1.75x        1.00x
=====================================================================================
</TABLE>
                                                                  
                           

<PAGE>

         Summary Data for Selected Public U.S. Pharmaceutical Companies
                  (Figures in millions, except per share data)

<TABLE>
<CAPTION>
                                                                               OPERATING DATA FOR LATEST TWELVE MONTHS              
                                                                       --------------------------------------------------------     
                                                                                    5-Year                                          
                                                   FY       LTM                     Revenue   Gross     R&D       SG&A      LTM     
Ticker   Company                                   END      END        Revenues     Growth**  Margin   Margin    Margin     EPS     
- ------   -------                                   ---      ---        --------     --------  ------   ------    ------     ---     
<S>      <C>                                      <C>      <C>         <C>           <C>       <C>      <C>       <C>      <C>      
AHP      American Home Products Corporation (a)   12/31    9/30/96     $13,376.6     14.6%     66.8%    10.6%     38.9%    $1.95    
                                                                                                                                    
BMY      Bristol-Myers Squibb Company  (b)        12/31    9/30/96      13,768.0      7.2%     70.7%     9.2%     40.2%     5.54    
                                                                                                                                    
LLY      Eli Lilly and Company  (c)               12/31    9/30/96       7,084.8      5.4%     71.5%    15.9%     27.9%     2.67    
                                                                                                                                    
MRK      Merck & Co.  (d)                         12/31    9/30/96      18,979.6     16.8%     52.7%     7.6%     19.0%     3.02    
                                                                                                                                    
PFE      Pfizer Inc. (e)                          12/31    9/30/96      10,890.4     11.3%     80.5%    14.9%     38.5%     2.85    
                                                                                                                                    
PNU      Pharmacia & Upjohn (f)                   12/31    9/30/96       7,128.9      7.5%     71.1%    17.7%     36.3%     1.61    
                                                                                                                                    
RPR      Rhone-Poulenc Rorer Inc. (g)             12/31    9/30/96       5,660.2     12.8%     NM       NM        NM        3.06    
                                                                                                                                    
SGP      Schering-Plough Corporation  (h)         12/31    9/30/96       5,532.4      9.8%     80.7%    11.7%     39.0%     3.20    
                                                                                                                                    
WLA      Warner-Lambert Company (i)               12/31    9/30/96       7,248.3      8.5%     58.3%     7.5%     43.9%     2.73    


                                                                    ----------------------------------------------------------------
                                                                    MEAN:            10.4%     69.0%    11.9%     35.5%             
                                                                                                                                    
                                                                    MEDIAN:           9.8%     70.7%    10.6%     38.5%             
                                                                                                                                    
                                                                    HIGH:            16.8%     80.7%    17.7%     43.9%             
                                                                                                                                    
                                                                    LOW:              5.4%     52.7%     7.6%     19.0%             
                                                                    ----------------------------------------------------------------
</TABLE>


                                             Current
                                    5-Year    Stock
         1996E    1997E    1998E   Proj. EPS  Price     Current
Ticker    EPS*     EPS*     EPS*    Growth*   1/3/97     Yield
- ------    ----     ----     ----    -------   ------     -----
AHP      $2.94    $3.37    $3.81     12.1%    $59.000    2.65%
                                                        
BMY       5.66     6.25     6.90      9.2%   $109.375    2.75%
                                                        
LLY       2.67     3.15     3.63     13.4%    $72.250    1.92%
                                                        
MRK       3.18     3.72     4.27     13.2%    $82.625    1.79%
                                                        
PFE       2.99     3.48     4.08     15.5%    $83.625    1.43%
                                                        
PNU       1.90     2.26     2.59     13.8%    $39.000    2.77%
                                                        
RPR       3.38     4.02     4.73     16.0%    $77.000    1.64%
                                                        
SGP       3.29     3.74     4.21     12.6%    $65.125    1.97%
                                                        
WLA       2.74     3.08     3.62     12.3%    $75.625    1.82%


         -----------------------------------------------------
                                     13.1%               2.08%
                                                        
                                     13.2%               1.92%
                                                        
                                     16.0%               2.77%
                                                        
                                      9.2%               1.43%
         -----------------------------------------------------

*   EPS based on Mean First Call estimates as of 5/15/96 and Estimated 5 Year
    EPS Growth Rate based on Bloomberg as of 5/21/96.

**  Five-Year Revenue Growth based on historical financial statements.

<PAGE>

         Summary Data for Selected Public U.S. Pharmaceutical Companies
                  (Figures in millions, except per share data)

<TABLE>
<CAPTION>
                                                                                                MARKET VALUE             
                                                                                              AS A MULTIPLE OF           
                                                                         Mkt.         --------------------------------   
                                                                        Value+                                           
                                                  Book        Mkt.       Net          LTM      1996E    1997E    1998E   
Ticker  Company                                   Value      Value       Debt         EPS       EPS      EPS      EPS    
- ------  -------                                   -----      -----       ----         ---       ---      ---      ---    
<S>     <C>                                     <C>        <C>         <C>            <C>      <C>      <C>      <C>     
AHP     American Home Products Corporation (a)  $6,527.5   $37,678.8   $42,916.3      30.3x    20.1x    17.5x    15.5x   
                                                                                                                         
BMY     Bristol-Myers Squibb Company  (b)        6,349.0    54,774.3    54,042.3      19.8     19.3     17.5     15.9    
                                                                                                                         
LLY     Eli Lilly and Company  (c)               7,499.2    39,867.9    43,083.2      27.0     27.1     22.9     19.9    
                                                                                                                         
MRK     Merck & Co.  (d)                        11,396.5    99,599.4   101,746.6      27.4     26.0     22.2     19.4    
                                                                                                                         
PFE     Pfizer Inc. (e)                          6,566.0    53,907.0    54,387.0      29.3     28.0     24.0     20.5    
                                                                                                                         
PNU     Pharmacia & Upjohn (f)                   6,413.8    19,815.7    19,752.0      24.3     20.5     17.3     15.1    
                                                                                                                         
RPR     Rhone-Poulenc Rorer Inc. (g)             2,357.2    10,503.3    13,676.1      25.2     22.8     19.2     16.3    
                                                                                                                         
SGP     Schering-Plough Corporation  (h)         2,240.4    24,055.8    24,222.9      20.4     19.8     17.4     15.5    
                                                                                                                         
WLA     Warner-Lambert Company (i)               2,499.5    20,513.1    22,477.6      27.7     27.6     24.6     20.9    


                                                       ------------------------------------------------------------------
                                                       MEAN:                          25.7     23.5     20.3     17.6    
                                                                                                                         
                                                       MEDIAN:                        24.3     22.8     18.3     16.1    
                                                                                                                         
                                                       HIGH:                          30.3     28.0     24.6     20.9    
                                                                                                                         
                                                       LOW:                           19.8     19.3     17.3     15.1    
                                                       ------------------------------------------------------------------


<CAPTION>
           P/E TO GROWTH RATE                 MV PLUS NET DEBT
            AS A MULTIPLE OF                  AS A MULTIPLE OF
        ----------------------             -----------------------
                                  Book                               5-Year
        1996E    1997E   1998E    Value     LTM      LTM      LTM   Proj. EPS  Net Debt/
Ticker   P/E      P/E     P/E   Per Share  Sales    EBITDA    EBIT   Growth    Net Cap.
- ------   ---      ---     ---   ---------  -----    ------    ----   ------    --------
<S>      <C>      <C>     <C>      <C>     <C>       <C>      <C>     <C>       <C>  
AHP      1.66     1.44    1.28     6.6x    3.21x     11.8x    15.0x   12.1%     44.5%
                                                                               
BMY      2.09     1.89    1.72     8.5     3.93x     12.9     14.9     9.2%    -13.0%
                                                                               
LLY      2.01     1.71    1.48     5.7     6.08x     17.2     22.0    13.4%     30.0%
                                                                               
MRK      1.97     1.68    1.47     8.9     5.36x     22.1     20.6    13.2%     15.9%
                                                                               
PFE      1.80     1.55    1.32     8.3     4.99x     16.1     18.4    15.5%      6.8%
                                                                               
PNU      1.49     1.25    1.09     3.1     2.77x     11.6     16.2    13.8%     -1.0%
                                                                               
RPR      1.42     1.20    1.02     5.8     2.42x     13.8     22.5    16.0%     57.4%
                                                                               
SGP      1.57     1.38    1.23    10.8     4.38x     13.7     15.1    12.6%      6.9%
                                                                               
WLA      2.25     2.00    1.70     9.0     3.10x     16.8     20.0    12.3%     44.0%


        -----------------------------------------------------------------------------
         1.81     1.57    1.37     7.4     4.03x     15.1     18.3    13.1%     21.3%
                                                                               
         1.80     1.55    1.32     5.8     3.93x     13.8     18.4    13.2%     15.9%
                                                                               
         2.25     2.00    1.72    10.8     6.08x     22.1     22.5    16.0%     57.4%
                                                                               
         1.49     1.25    1.09     3.1     2.77x     11.6     14.9     9.2%    -13.0%
        -----------------------------------------------------------------------------
</TABLE>
<PAGE>
Analysis of Comparable Biotechnology Companies
================================================================================
Gene Therapy Companies

<TABLE>
<CAPTION>
                                                                                                   Simple           Fully-Diluted
                                      Current                              EPS               -----------------  --------------------
                             LTM/      Price    52 Wk    52 Wk    -------------------------  Market Technology   Market   Technology
Company                    Fiscal Yr   1/3/97    High     Low       LTM   1996E(a)  1997E(a)  Value  Value (b)  Value (b)  Value (b)
- -------                    ---------   ------    ----     ---     ------  --------  --------  -----  ---------  ---------  ---------
<S>                          <C>       <C>      <C>      <C>      <C>      <C>      <C>      <C>       <C>       <C>       <C>   
Avigen, Inc.                 9/30/96   $ 4.50   $11.75   $ 3.50   ($0.74)  ($0.57)  ($1.00)  $ 32.8    $ 15.6    $ 36.1    $ 15.1
(AVGN)                       6/30/96                                                                                       
                                                                                                                           
                                                                                                                           
GeneMedicine, Inc. (e)       9/30/96   $ 6.25   $ 9.00   $ 3.13   ($0.94)  ($0.87)  ($0.61)  $ 81.2    $ 48.5    $100.6    $ 42.9
(GMED)                      12/31/95                                                                                       
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
Ribozyme Pharmaceuticals     9/30/96   $11.50   $21.13   $ 8.75   ($3.23)  ($1.47)  ($0.54)  $ 79.5    $ 57.3    $ 88.9    $ 55.5
Inc. (RZYM)                 12/31/95                                                                                       
                                                                                                                           
Somatix Therapy Corp. (f)    9/30/96   $ 3.53   $ 9.31   $ 3.19   ($0.92)  ($2.09)  ($0.81)  $ 86.1    $ 72.3    $107.4    $ 70.8
(SOMA)                       6/30/95                                                                                       
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
Targeted Genetics Corp.(g)   9/30/96   $ 4.50   $ 7.25   $ 3.13   ($1.20)     NA       NA    $ 90.5    $ 68.7    $ 99.2    $ 69.6
(TGEN)                      12/31/95                                                                                       
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
Vical Inc.                   9/30/96   $17.25   $21.25   $11.00   ($0.33)  ($0.48)  ($0.80)  $265.4    $216.7    $270.7    $219.9
(VICL)                      12/31/95                                                                                       

- ------------------------------------------------------------------------------------------------------------------------------------
Mean                                                                                         $105.9    $ 79.8    $117.2    $ 79.0
Median                                                                                       $ 83.7    $ 63.0    $ 99.9    $ 62.6
Maximum                                                                                      $265.4    $216.7    $270.7    $219.9
Minimum                                                                                      $ 32.8    $ 15.6    $ 36.1    $ 15.1
- ------------------------------------------------------------------------------------------------------------------------------------


<CAPTION>
                                                 Funds       No. of Products                                        LTM      Implied
                              Corporate       Invested by    in Development           Product                       Burn      Burn
Company                       Partners        Partners(c)        Program               Focus               Cash    Rate(d)   Life(d)
- -------                       ---------       -----------    ---------------     --------------------      -----   -------   -------
<S>                        <C>                   <C>          <C>                <C>                       <C>      <C>        <C>
Avigen, Inc.               None                  $ 0.0        Preclinical        Cancer                    $17.2    $ 4.3      4.0
(AVGN)                                                                           Blood Diseases                              
                                                                                 Infectious Diseases                         
                                                                                                                             
GeneMedicine, Inc. (e)     Roche                 $23.0        Phase I - 1        Cancer                    $32.7    $11.7      2.8
(GMED)                     Corange Int'l                                         Muscle                                      
                                                                                 Blood                                       
                                                                                 Inflammatory                                
                                                                                 Cardiovascular                              
                                                                                 Growth Factors                              
                                                                                                                             
Ribozyme Pharmacueticals   Chiron                $11.5        Preclinical        Diabetic Retinopathy      $22.3    $16.1      1.4
(RZYM)                     Parke-Davis (WLA)                                     HIV, Various Other                          
                                                                                                                             
Somatix Therapy Corp. (f)  Baxter                $12.0        Phase I/II - 4     Cancer                    $13.8    $21.1      0.7
(SOMA)                     Bristol-Myers Squibb                                  Neurology                                   
                                                                                 Hemophilia                                  
                                                                                 Parkinson's                                 
                                                                                 Chronic Granulomatous                       
                                                                                                                             
Targeted Genetics Corp.(g) Immunex                16.6        Phase I/II - 5     HIV                       $21.9    $17.4      1.3
(TGEN)                     CellPro                                               Cancer                                      
                                                                                 Gaucher Disease                             
                                                                                 Cystic Fibrosis                             
                                                                                 Peripheral Blood                            
                                                                                                                             
Vical Inc.                 Merck                  14.6        Phase II - 1       Cancer                    $48.7    $ 5.6      8.7
(VICL)                     Genzyme                            Phase I/II - 2     Cancer                                      
                           Pasteur-Merieux                                       Infectious Disease                          
                           Baxter, Isis                                                                                      
                                                                                                    
- ----------------------------------------------------------------------------------------------------------------------------------
Mean                                                                                                       $26.1    $12.7      3.1
Median                                                                                                     $22.1    $13.9      2.1
Maximum                                                                                                    $48.7    $21.1      8.7
Minimum                                                                                                    $13.8    $ 4.3      0.7
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- ----------
(a)  EPS projected for twelve months ended December 31 (Calendarized). Source:
     First Call as of January 3, 1997..

(b)  Fully diluted market value includes vested and in-the-money options.
     Technology Value = Fully diluted market value less cash, short-term
     marketable securities and proceeds from the excercise of options and
     warrants.

(c)  Includes shares purchased by corporate partner and royalties and milestones
     from inception to date of latest financial quarter.

(d)  Implied Burn Life is equal to Cash + Marketable Securities divided by the
     Burn Rate. Burn Rate is equal to the absolute value of (Net Income +
     Depreciation - Capital Expenditures).

(e)  GMED shares outstanding include 3.75M Series B Preferred Stock.

(f)  SOMA pro forma the 2/13/95 stock-for-stock acquisition of Merlin
     Pharmaceutical Corporation for a total purchase price of $13.7M (inclusive
     of warrants, options, acquisition-related expenses and liabilities
     assumed). SOMA issued 2.3M shares for all of Merlin stock. $1.06MM
     restructuring charge (tax effected at 40%) excluded for the three months
     ended September 30, 1996. Shares outstanding includes 2.5 million shares
     from assumed conversion of preferred stock.

(g)  One time expense of $13.518MM related to Rgene merger excluded for the nine
     months ended September 30, 1996. Not pro forma for June 1996 merger with
     Rgene.

                                                                 LEHMAN BROTHERS

<PAGE>

Analysis of Comparable Biotechnology Companies
================================================================================
Cell Therapy Companies

<TABLE>
<CAPTION>
                                                                                                  Simple            Fully-Diluted
                                   Current                               EPS                 ---------------------------------------
                            LTM/    Price   52 Wk      52 Wk    -------------------------    Market  Technology  Market   Technology
Company                  Fiscal Yr  1/3/97   High       Low      LTM   1996E(a)  1997E(a)    Value    Value(b)   Value(b)  Value(b)
- -------                  ---------  ------   ----       ---     -----  --------  --------    -----    --------   -------- ----------
<S>                       <C>       <C>     <C>        <C>     <C>      <C>      <C>         <C>       <C>        <C>       <C>   
Cell Genesys, Inc. (e)    9/30/96   $ 9.25  $11.63    $ 6.00   ($0.50)  ($0.77)  ($0.73)     $152.3    $ 74.4     $183.8    $ 77.4
(CEGE)                   12/31/95                                                                                          
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
CellPro, Inc. (f)         9/30/96   $12.25  $19.25    $11.00   ($1.39)  ($1.27)  ($1.47)     $176.8    $111.6     $196.1    $104.8
(CPRO)                    3/31/96                                                                                          
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
                                                                                                                           
Sprint (g)                9/30/96   $15.06  $18.63    $11.00   ($2.81)     NA       NA       $218.4    $193.4     $243.9    $199.4
                         12/31/95                                                                                          
                                                                                                                           
                                                                                                                           
===================================================================================================================================
Mean                                                                                         $164.6    $ 93.0     $189.9    $ 91.1
Median                                                                                       $164.6    $ 93.0     $189.9    $ 91.1
Maximum                                                                                      $176.8    $111.6     $196.1    $104.8
Minimum                                                                                      $152.3    $ 74.4     $183.8    $ 77.4
===================================================================================================================================


<CAPTION>
                                                   Funds      No. of Products                             LTM      Implied
                              Corporate         Invested by   in Development    Product                   Burn      Burn
Company                       Partners          Partners(c)       Program        Focus          Cash     Rate(d)   Life(d)
- -------                  ---------------------  -----------   ---------------   -------         -----    -------   -------
<S>                      <C>                       <C>                  <C>                     <C>       <C>      <C> 
Cell Genesys, Inc. (e)   Japan Tobacco            $ 42.8     Phase II - 1        AIDS           $77.9     $ 5.0     15.5
(CEGE)                   Hoechst Marion Roussel                                                                   
                                                                                                                  
                                                                                                                  
                                                                                                                  
                                                                                                                  
                                                                                                                  
CellPro, Inc. (f)        Corixa                   $ 80.0     Phase I/II - 6      Cancer         $65.3     $16.5      4.0
(CPRO)                   Targeted Genetics                   Phase II - 1        AIDS                             
                                                             Phase III - 1                                        
                                                             Eur. Approval - 1                                    
                                                                                                                  
                                                                                                                  
                                                                                                                  
                                                                                                                  
                                                                                                                  
Sprint (g)               Sandoz                   $471.3     Phase I/II - 1      Cancer         $25.0     $32.6      0.8
                                                                                                                  
                                                                                                                  

<CAPTION>

=========================================================================================================================
<S>                                                                                            <C>       <C>       <C>
Mean                                                                                            $71.6     $10.8      9.7
Median                                                                                          $71.6     $10.8      9.7
Maximum                                                                                         $77.9     $16.5     15.5
Minimum                                                                                         $65.3     $ 5.0      4.0
=========================================================================================================================
</TABLE>

- ----------
(a)  EPS projected for twelve months ended December 31 (Calendarized). Source:
     First Call as of January 3, 1997.

(b)  Fully diluted market value includes vested and in-the-money options.
     Technology Value = Fully diluted market value less cash, short-term
     marketable securities and proceeds from the excercise of options and
     warrants.

(c)  Includes shares purchased by corporate partner and royalties and milestones
     from inception to date of latest financial quarter.

(d)  Implied Burn Life is equal to Cash + Marketable Securities divided by the
     Burn Rate. Burn Rate is equal to the absolute value of (Net Income +
     Depreciation - Capital Expenditures).

(e)  CEGE Shares, Cash and Funds Invested reflect the $20M (2.0M shares)
     investment by Hoechst Marion Roussel.

(f)  CPRO recently ended the collaboration with Corange. CellPro's CEPRATE SC
     System, sold in Europe since 1993, awaits review of its PMA application by
     the FDA.

(g)  Sprint Cash Balance of $25.0 MM is as of 12/31/96 per management estimate.

                                                                 LEHMAN BROTHERS
<PAGE>

                               LEHMAN BROTHERS

B

<PAGE>

Sprint Discounted Cash Flow Analysis
================================================================================
Discounted Cash Flow Analysis
Terminal Year: 2001 (Revenue)
(Sprint Projections)

<TABLE>
<S>                              <C>         <C>         <C>         <C>         <C>         <C>         <C>         <C>     
                             ------------------------------------------------------------------------------------------------
   Discount rate                                    35.0%                                          40.0%                     
                             ------------------------------------------------------------------------------------------------
                             ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
   Revenue multiple              5.0x        6.0x        7.0x        8.0x        5.0x        6.0x        7.0x        8.0x    
                             ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
Cash flows, 1997 to 2001         21.7        21.7        21.7        21.7        12.3        12.3        12.3        12.3    

PV of Other Products               NM          NM          NM          NM          NM          NM          NM          NM    

Terminal value, 200             631.9       758.3       884.6     1,011.0       526.8       632.2       737.6       842.9    
                             ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
Enterprise Value                653.6       780.0       906.4     1,032.8       539.2       644.5        7499       855.3    

Plus: Option proceeds            28.4        28.4        28.4        28.4        28.4        28.4        28.4        28.4    

Plus: Cash and investments       25.0        25.0        25.0        25.0        25.0        25.0        25 0        25.0    

Plus: Residual NOL               --          --          --          --          --          --          --          --      

Less: Total debt                 (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)   

Equity Value                    701.0       827.4       953.8     1,080.2       586.6       691.9       797.3       902.7    

Fully-diluted shares
 outstanding                     16.2        16.2        16.2        16.2        16.2        16.2        16.2        16.2    

Equity Value Per Share      $   43.29   $   51.10   $   58.90   $   66.70   $   36.22   $   42.73   $   49.24   $   55.74   
                            ------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<S>                                 <C>         <C>         <C>         <C>        <C>         <C>         <C>         <C>  
                               ------------------------------------------------------------------------------------------------
   Discount rate                                    45.0%                                          50.0%
                               ------------------------------------------------------------------------------------------------
                               ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
   Revenue multiple                5.0x        6.0x        7.0x        8.0x        5.0x        6.0x        7.0x        8.0x
                               ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
Cash flows, 1997 to 2001            5.0         5.0         5.0         5.0        (0.9)       (0.9)       (0.9)       (0.9)

PV of Other Products                 NM          NM          NM          NM          NM          NM          NM          NM

Terminal value, 200               442.1       530.5       618.9       707.3       373.1       447.8       522.4       597.0
                               ----------- ----------- ----------- ----------- ----------- ------------ ---------- ------------
Enterprise Value                  447.0       535.4       623.8       712.2       372.3       446.9       521.5       596.1

Plus: Option proceeds              28.4        28.4        28.4        28.4        28.4        28.4        28.4        28.4

Plus: Cash and investments         25.0        25.0        25.0        25.0        25.0        25.0        25.0        25.0

Plus: Residual NOL                 --          --          --          --          --          --          --          --   

Less: Total debt                   (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)       (6.0)

Equity Value                      494.4       582.8       671.2       759.6       419.7       494.3       568.9       643.5

Fully-diluted shares
 outstanding                       16.2        16.2        16.2        16.2        16.2        16.2        16.2        16.2

Equity Value Per Share         $  30.53   $   35.99   $   41.45   $   46.91   $   25.92   $   30.52   $   35.13   $   39.74
                               ------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
Schedule of Unlevered 
Free Cash Flows                    1996        1997        1998        1999        2000        2001        2002        2003   
                                ---------   ---------   ---------   ---------  ----------   ---------   ---------   ---------
<S>                             <C>         <C>         <C>         <C>         <C>         <C>         <C>         <C>       
EBIT                            ($  42.4)   ($  44.3)   ($  40.2)   $    3.6    $  112.0    $  323.6    $  698.2    $1,177.4  
  % of revenues                  -215.7%     -140.4%      -83.5%         3.4%       45.5%       57.1%       59.3%       60.1% 
  % growth                            NM          NM          NM          NM      3010.5%      189.0%      115.7%       68.6% 

 Taxes                              --          --          --          --          --          78.9       286.3       482.7  
                                ---------   ---------   ---------   ---------  ----------   ---------   ---------   ---------
 % EBIT                              0.0%        0.0%        0.0%        0.0%        0.0%       24.4%       41.0%       41.0% 

 EBIT. after tax                   (42.4)      (44.3)      (40.2)        3.6       112.0       244.8       412.0       694.7  

Depreciation                        10.0        12.3        14.1        12.2        14.3        17.7        22.6        30.5  
 % capital expenditures              0.4%        0.1%        0.1%        0.1%        0.1%        0.1%        0.1%        0.1% 

 Other non-cash charges
   (HIV depreciation)               --          --          --          --           0.5         1.6         2.2         3.3  
                                ---------   ---------   ---------   ---------  ----------   ---------   ---------   ---------

 Operating cash flow               (32.4)      (32.0)      (26.1)       15.8       126.9       264.1       436.8       728.4  
 % revenues                       -164.8%     -101.5%      -54.3%       14.8%       51.6%       46.6%       37.1%       37.2% 

 Investment in working capital       0.5         0.4         0.7        (3.3)       (9.5)      (16.2)      (26.9)      (35.3) 
  %Change in revenues                3.2%        3.5%        4.3%       -5.7%       -6.8%       -5.1%       -4.4%       -4.5%  

Capital expenditures                (2.8)      (14.2)      (14.9)      (16.5)      (22.3)      (20.3)      (34.1)      (45.8) 
                                ---------   ---------   ---------   ---------  ----------   ---------   ---------   ---------
% revenues                          14.1%       45.0%       31.0%       15.5%        9.0%        3.6%        2.9%        2.3% 

Unlevered Free Cash Flows       ($  34.7)   ($  45.8)   ($  40.3)   ($   4.0)   $   95.1    $  227.6    $  375.8    $  647.4  
                                =========   =========   =========   =========  ==========   =========   =========   =========
Cumulative Free Cash Flows      ($  34.7)   ($  80.5)   ($ 120.8)   ($ 124.8)   ($  29.7)   $  197.9    $  573.7    $1,221.1  
    % revenues                     176.3%    -145.1%        83.8%      -3.8%        38.6%       40.2%       31.9%       33.1% 
    % growth                          NM          NM          NM          NM          NM       139.3%       65.1%       72.3% 
</TABLE>

Schedule of Unlevered 
Free Cash Flows                     2004        2005
                                 ---------   ---------
EBIT                             $1,827.8    $2,313.3
  % of revenues                      61.4%       61.5%
  % growth                           55.2%       26.6%

 Taxes                              749.4       948.5
                                 ---------   ---------
 % EBIT                              41.0%       41.0%

 EBIT. after tax                  1,078.4     1,364.9

Depreciation                         39.9        49.7
 % capital expenditures               0.1%        0.1%

 Other non-cash charges
   (HIV depreciation)                 3.8         3.4
                                 ---------   ---------

 Operating cash flow              1,122.1     1,418.0
 % revenues                          37.7%       37.7%

 Investment in working capital      (46.0)      (34.1)
  %Change in revenues                -4.5%        -43%

Capital expenditures                (52.8)      (56.4)
                                 ---------   ---------
% revenues                            1.8%        1.5%

Unlevered Free Cash Flows        $1,023.3    $1,327.5
                                 =========   =========
Cumulative Free Cash Flows       $2,244.4    $3,571.9
    % revenues                       34.4%       35.3%
    % growth                         58.1%       29.7%

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
<CAPTION>
Consolidated Income Statement       1995       1996       1997       1998       1999     2000      2001      2002       2003     
                                  --------   --------   ---------  --------  --------  --------  -------   --------   --------   
<S>                                    <C>    <C>        <C>        <C>       <C>       <C>      <C>      <C>        <C>         
REVENUES
Cancer:
HSC-IP CLL                                    $   0.0    $   0.0    $   0.3    $  1.0   $   1.8   $  6.1   $    9.7   $   14.3   
HSC-IP NHL                                       --         --          6.8      37.8      84.1    123.5      180.9      226.6   
HSC-IP MM                                        --         --          2.5      10.5      24.3     36.7       52.0       57.3   
HSC-IP Breast Cancer                             --         --          4.5      26.1     100.1    200.2      322.5      373.7   
HSC-IP AIS                                       --         --         --        --        --      139.9      376.5      712.3   
HSC-IU-GD                                        --         --         --        --         6.8     25.3       43.4       65.6   
HSC-GT                                           --         --         --        --        --        3.9       80.1      257.4   
HSC-TI                                           --         --         --        --        --       --         --         --     
HSC-IP Leukemia                                  --         --         --        --        --       --         --         29.3   
HSC - GT HIV Profit Distribution                 --         --         --        --        --        0.0       87.2      193.3   
                                             --------   ---------  --------  --------  --------  -------   --------   --------   
Total Product Revenues                           --         --         14.1      75.4     217.0    535.5    1,152.3    1,929.7   
% growth                                          0.0%       0.0%       0.0%    435.3%    187.8%   146.7%     115.2%      67.5%  

Collaborative research                 2.3       13.8       22.3       25.0      26.1      22.0     16.0       15.2        1.2   
Milestone payments                    --          5.5        9.0        9.0       5.0       6.5     12.0        3.0        8.0   
Grants                                 1.0        0.1       --         --        --        --       --         --         --     
Royalties                             --         --         --         --         0.0       0.5      3.2        7.3       19.5   
Other                                  0.3        0.2        0.2       --        --        --       --         --         --     
                                  --------   --------   ---------  --------  --------  --------  -------   --------   --------   
Total Revenues                         3.6       19.7       31.5       48.1     106.6     246.1    566.7    1,177.8    1,958.4   
 % growth                                0%       444%        60%        53%      121%      131%     130%       108%        66%  
OPERATING EXPENSES
Manufacturing                         15.4       20.2       23.4       35.6      63.9     129.7    244.0      389.3      552.7
 % revenues                              0%        78%        64%        49%       33%       26%      23%        21%        20%  
Research & development                46.7       40.0       48.0       55.4      57.1      58.8     85.0      176.7      293.8   
 % revenues                           1292%       203%       152%       115%       54%       24%      15%        15%        15%  
Selling, general & administrative      8.1        6.7        7.6        9.6      10.3      11.4     28.3       58.9       97.9   
 % revenues                            224%        34%        24%        20%       10%        5%       5%         5%         5%  
                                  --------   --------   ---------  --------  --------  --------  -------   --------   --------   
Total Expenses                        54.8       62.1       75.8       88.3     103.0     134.1    243.1      479.6      781.0   
 % revenues                           1517%       316%       240%       184%       97%       54%      43%        41%        40%  
EBIT                                 (51.2)     (42.4)     (44.3)     (40.2)      3.6     112.0    323.6      698.2    1,177.4   
 % revenues                                      -216%      -140%       -84%        3%       46%      57%        59%        60%  
 Other income                          3.1       --         --         --        --        --       --         --         --     
 Depreciation and amortization         9.5       10.0       12.3       14.1      12.2      14.3     17.7       22.6       30.5   
 % capital expenditures                0.2%       0.4%       0.1%       0.1%      0.1%      0.1%     0.1%       0.1%       0.1%  
 EBITDA                              (41.8)     (32.4)     (32.0)     (26.1)     15.8     126.3    341.3      720.9    1,207.9   
% revenues                          -1155%      -165%      -101%       -54%        15%       51%      60%        61%        62%  
 Taxes                                           --         --         --        --        --       78.9      286.3      482.7   
  % EBIT                                 0%         0%         0%         0%        0%        0%      24%        41%        41%  
Net income                         ($   48)   ($ 42.4)   ($ 44.3)   ($ 40.2)   $  3.6   $ 112.0   $244.8   $  412.0   $  694.7   
 % revenues                             NM      -216%      -140%       -84%         3%       46%      43%        35%        35%  
Shares outstanding                    14.0       14.5       15.9       17.7      17.7      17.7     17.7       17.7       17.7   
EPS                                ($ 3.43)   ($ 2.93)   ($ 2.78)   ($ 2.27)   $ 0.20     $6.32   $13.81   $  23.24   $  39.19   
 % growth                               NM         NM         NM         NM        NM    3010.5%   118.5%      68.3%      68.6%  
</TABLE>

Consolidated Income Statement         2004       2005
                                    --------   --------
REVENUES
Cancer:
HSC-IP CLL                          $   18.4   $   22.8
HSC-IP NHL                             242.9      250.2
HSC-IP MM                               59.0       60.8
HSC-IP Breast Cancer                   481.1      495.6
HSC-IP AIS                             978.2    1,007.5
HSC-IU-GD                               73.7       75.9
HSC-GT                                 487.8      889.1
HSC-TI                                  29.9      131.5
HSC-IP Leukemia                        127.6      230.2
HSC - GT HIV Profit Distribution       435.5      542.3
                                    --------   --------
Total Product Revenues               2,934.1    3,705.8
% growth                                52.0%      26.3%

Collaborative research                  --         --
Milestone payments                       5.0       --
Grants                                  --         --
Royalties                               36.5       55.3
Other                                   --         --
                                    --------   --------
Total Revenues                       2,975.6    3,761.1
 % growth                                 52%        26%
OPERATING EXPENSES
Manufacturing                          552.7      695.1
 % revenues                               19%        18%
Research & development                 446.3      564.2
 % revenues                               15%        15%
Selling, general & administrative      148.8      188.1
 % revenues                                5%         5%
                                    --------   --------
Total Expenses                       1,147.8    1,447.8
 % revenues                               39%        38%
EBIT                                 1,827.8    2,313.3
 % revenues                               61%        62%
 Other income                           --         --
 Depreciation and amortization          39.9       49.7
 % capital expenditures                  0.1%       0.1%
 EBITDA                              1,867.7    2,363.0
% revenues                                63%        63%
 Taxes                                 749.4      948.5
  % EBIT                                  41%        41%
Net income                          $l,078.4   $1,364.9
 % revenues                               36%        36%
Shares outstanding                      17.7
EPS                                 $  60.84   $  77.00
 % growth                               55.2%      26.6%

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
<CAPTION>
Consolidated Balance Sheet                  1995     1996      1997     1998      1999      2000      2001      2002       2003   
                                            ----     ----      ----     ----      ----      ----      ----      ----       ----   
<S>                                      <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>      
ASSETS
Cash and cash equivalents                $  67.5   $  31.0   $   6.8   $  11.3   $  16.6   $ 110.6   $ 334.9   $ 706.4   $1,347.2 
Accounts receivable                          0.3       0.2       0.2       1.l       6.0      17.4      43.1      92.8      155.9 
Other current assets                         1.3       0.7       0.7       0.7       0.7       0.7       0.7       0.7        0.7 
Total Current Assets                        69.1      31.9       7.7      13.1      23.4     128.7     378.7     799.8    1,503.8 

Equipment/building improvements             60.8      63.6      77.7      92.7     109.1     131.4     151.7     185.7      231.5 
Equipment under capital lease               10.8      10.8      10.8      10.8      --        --        --        --         --   
                                            71.5      74.3      88.5     103.4     109.1     131.4     151.7     185.7      231.5 

Accumulated depreciation                   (21.0)    (31.0)    (43.3)    (57.3)    (69.6)    (83.3)    (99.3)   (119.8)    (147.0)
 Net property and equipment                 50.6      43.3      45.2      46.1      39.6      48.1      52.3      66.0       84.5 

Other assets                                 0.5       0.6       0.6       0.6       0.6       0.6       0.6       0.6        0.6 

Total Assets                             $ 120.2   $  75.8   $  53.5   $  59.8   $  63.5   $ 177.4   $ 431.7   $ 866.4   $1,588.9 

LIABILITIES AND EQUITY
Accounts payable and accrueds                6.7       6.6       7.6       8.8      10.3      13.4      24.3      48.0       78.1 
Current portion of deferred rent             0.1      --        --        --         0.8       0.8       0.8       0.8        0.8 
Short-term capital leases                    1.8       2.0       2.1       1.4      --        --        --        --         --   
Deferred revenue                             3.1       3.0       2.2       2.5       2.6       2.2       1.6       1.5        0.1 
Total Current Liabilities                   11.7      11.5      11.9      12.8      13.7      16.4      26.7      50.3       79.0 

Long-term capital leases                     5.5       3.5       1.4      --        --        --        --        --         --   
Accrued rent, less current portion           4.5       4.7       4.8       5.0       4.1       3.3       2.5       1.7        0.8 

Common stock                               246.7     246.7     270.2     317.2     317.2     317.2     317.2     317.2      317.2 
Retained earnings (deficit) - Beginning   (100.1)   (148.2)   (190.7)   (234.9)   (275.1)   (271.5)   (159.5)     85.3      497.2 
Net income (loss)                          (48.1)    (42.4)    (44.3)    (40.2)      3.6     112.0     244.8     412.0      694.7 
Retained earnings (deficit) - ending      (148.2)   (190.7)   (234.9)   (275.1)   (271.5)   (159.5)     85.3     497.2    1,191.9 
Total Equity                                98.5      56.0      35.3      42.1      45.7     157.7     402.4     814.4    1,509.1 
Total Liabilities and Equity             $ 120.2   $  75.8   $  53.5   $  59.8   $  63.5   $ 177.4   $ 431.7   $ 866.4   $1,588.9 
</TABLE>

Consolidated Balance Sheet                   2004       2005
                                             ----       ----
ASSETS
Cash and cash equivalents                 $2,362.9   $3,683.6
Accounts receivable                          237.7      300.9
Other current assets                           0.7        0.7
Total Current Assets                       2,601.2    3,985.1

Equipment/building improvements              284.3      340.7
Equipment under capital lease                 --         --
                                             284.3      340.7

Accumulated depreciation                    (183.0)    (229.4)
 Net property and equipment                  101.3      111.4

Other assets                                   0.6        0.6

Total Assets                              $2,703.1   $4,097.1

LIABILITIES AND EQUITY
Accounts payable and accrueds                114.8      144.8
Current portion of deferred rent               0.8       --
Short-term capital leases                     --         --
Deferred revenue                              --         --
Total Current Liabilities                    115.6      144.8

Long-term capital leases                      --         --
Accrued rent, less current portion            --         --

Common stock                                 317.2      317.2
Retained earnings (deficit) - Beginning    1,191.9    2,270.3
Net income (loss)                          1,078.4    1,364.9
Retained earnings (deficit) - ending       2,270.3    3,635.1
Total Equity                               2,587.5    3,952.3
Total Liabilities and Equity              $2,703.1   $4,097.1

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
Market Analysis
Schedule of Eligible Patients
<TABLE>
<CAPTION>
                             1995    1996     1997      1998      1999      2000      2001      2002      2003      2004      2005
                             ----    ----     ----      ----      ----      ----      ----      ----      ----      ----      ----
<S>                          <C>       <C>      <C>       <C>       <C>      <C>       <C>       <C>       <C>       <C>       <C>
U.S. Market
     Cancer:
     HSC-IP CLL                        13       39        67        96       142       292       451       620       798       986
     HSC-IP NHL                     1,779    2.076     2,516     4,535     6.006     7.560     9,203    10,208    10,515    10.830
     HSC-IP MM                        403      593       917     1,259     1,621     2,003     2,407     2,479     2,554     2,630
     HSC-IP Breast Cancer           4,643    7,173    11,821    15,219    21,946    26,371    35,478    41,110    52,929    54,517
                                                                                                                          
     HSC-IP AIS                      --       --        --        --       4,389    22.606    32,598    47,965    59,285    61,063
     HSC-IP-GD                       --       --        --        --         225       464       716       984     1,013     1,044
     HSC-GT                          --       --        --        --       3,043     7,837    16,144    24,942    34,253    52,922
     HSC-TI                          --       --        --        --        --        --        --       7,625    10,484    15,376
     HSC-IP Leukemia                1,142    1.177     1,515     1,768     2,143     3,311     5,684     7,318    12,663    16,303
                                                                                                                          
Europe:                                                                                                                   
     Cancer:                                                                                                              
     HSC-IP CLL                        15       47        80       116       170       351       542       744       958     1,184
     HSC-IP NHL                     1,423    2,198     3,019     5,442     6,406     7,423     9,345    11,375    12,617    12,996
     HSC-IP MM                        346      712     1,100     1,511     1,945     2,404     2,889     2,975     3,065     3,157
     HSC-IP Breast Cancer           4,735    7,316    12,057    15,523    22,385    26,899    36,187    41,932    53,987    55,607
                                                                                                                          
     HSC-IP AIS                      --       --        --        --       5,267    27,127    39,117    57,558    71,142    73,276
     HSC-IU-GD                       --       --        --        --         230       473       731     1,004     1,034     1,065
     HSC-GT                          --       --        --        --        --       3,762     7,749    17,958    26,718    35,987
     HSC-TI                          --       --        --        --        --        --        --       3,240     4,456     6,535
     HSC-IP Leukemia                1,165    1,200     1,545     1,804     2,186     3,377     5,797     7,464    12,916    16,629
                                                                                                                          
Japan:                                                                                                                    
     Cancer:                                                                                                              
     HSC-IP CLL                         6       19        33        48        71       146       226       310       399       493
     HSC-IP NHL                       415      916     1.258     2,267     2,669     3,093     3,894     4,740     5,257     5,415
     HSC-IP MM                         29       74       153       315       486       668       860     1,063     1,277     1,315
     HSC-IP Breast Cancer             232      717     1,478     2,131     3,292     4,898     7,539     9,592    13,761    16,355
                                                                                                                          
     HSC-IP AIS                      --       --        --        --        --        --       2,328    11,991    17,291    25,443
     HSC-IU-GD                       --       --        --        --        --        --         107       209       329       444
     HSC-GT                          --       --        --        --        --        --       1,453     2,993     7,707    11,466
     HSC-TI                          --       --        --        --        --        --        --        --          46        56
     HSC-IP Leukemia                  486      500       644       752       911     1,407     2,416     3,110     5,382     6,929
                                                                                                                        
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
Market Share per Sprint's Business Plan

<TABLE>
<CAPTION>
                               1995      1996    1997     1998     1999     2000     2001     2002     2003     2004     2005
                               ----      ----    ----     ----     ----     ----     ----     ----     ----     ----     ----
<S>                             <C>      <C>      <C>      <C>      <C>     <C>      <C>      <C>      <C>      <C>      <C>  
U.S. Market
     Cancer:
     HSC-IP CLL                 0.0%     0.0%     0.0%     0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
     HSC-IP NHL                 0.0%     0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
     HSC-IP MM                  0.0%     0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
     HSC-IP Breast Cancer       0.0%     0.0%     0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%

     HSC-IP AIS                 0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
     HSC-I U-GD                 0.0%     0.0%     0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
     HSC-GT                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    20.0%    30.0%    40.0%    50.0%
     HSC-TI                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
     HSC-IP Leukemia            0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%    40.0%

Europe:
     Cancer:
     HSC-I P CLL                0.0%     0.0%     0.0%    50.0%    60.0%    60.0%    65.0%    65.0%    70.0%    70.0%    70.0%
     HSC-IP NHL                 0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
     HSC-IP MM                  0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
     HSC-IP Breast Cancer       0.0%     0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%    30.0%

     HSC-IP AIS                 0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
     HSC-I U-GD                 0.0%     0.0%     0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
     HSC-GT                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    40.0%    50.0%
     HSC-TI                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
     HSC-IP Leukemia            0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%

Japan:
     Cancer:
     HSC-IP CLL                 0.0%     0.0%     0.0%     0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
     HSC-IP NUL                 0.0%     0.0%     0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
     HSC-IP MM                  0.0%     0.0%     0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
     HSC-IP Breast Cancer       0.0%     0.0%     0.0%     0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%

     HSC-IP AIS                 0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    35.0%    40.0%    50.0%    50.0%
     HSC-IU-GD                  0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%
     HSC-GT                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    50.0%
     HSC-TI                     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
     HSC-IP Leukemia            0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
                                0.0%     0.0%     0.0%   115.0%   215.0%   515.0%   695.0%   910.0%  1075.0%  1240.0%  1365.0%
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
                                                       <C>      <C>      <C>      <C>      <C>     <C>      <C>      <C>
                                                       115.0%   215.0%   515.0%   695.0%   910.0%  1075.0%  1240.0%  1365.0%
<CAPTION>
Market Share Adjusted for Product Delays 

                          Product Delay
                            (in Years)   1996    1997    1998     1999    2000     2001     2002     2003     2004     2005
                            ---------    ----    ----    ----     ----    ----     ----     ----     -----    ----     ----
<S>                              <C>     <C>     <C>     <C>      <C>     <C>      <C>      <C>      <C>      <C>      <C>  
U.S. Market
     Cancer:
     HSC-IP CLL                  0       0.0%    0.0%    0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
     HSC-IP NUL                  0       0.0%    0.0%    0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
     HSC-IP MM                   0       0.0%    0.0%    0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
     HSC-IP Breast Cancer        0       0.0%    0.0%    0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%
                                        
     HSC-IP AIS                  0       0.0%    0.0%    0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
     HSC-IU-GD                   0       0.0%    0.0%    0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
     HSC-GT                      0       0.0%    0.0%    0.0%     0.0%     0.0%    10.0%    20.0%    30.0%    40.0%    50.0%
     HSC-TI                      0       0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
     HSC-IP Leukemia             0       0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%    40.0%
                                        
Europe:                                 
     Cancer:                            
     HSC-IP CLL                          0.0%    0.0%   50.0%    60.0%    60.0%    65.0%    65.0%    70.0%    70.0%    70.0%
     HSC-I P NUL                         0.0%    0.0%   30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
     HSC-IP MM                           0.0%    0.0%   30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
     HSC-IP Breast Cancer                0.0%    0.0%    5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%    30.0%
                                        
     HSC-IP AIS                          0.0%    0.0%    0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
     HSC-IU-GD                           0.0%    0.0%    0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
     HSC-GT                              0.0%    0.0%    0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    40.0%    50.0%
     HSC-TI                              0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
     HSC-IP Leukemia                     0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
                                        
Japan:                                  
     Cancer:                            
     HSC-IP CLL                          0.0%    0.0%    0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
     HSC-IP NUL                          0.0%    0.0%    0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
     HSC-IP MM                           0.0%    0.0%    0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
     HSC-IP Breast Cancer                0.0%    0.0%    0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%
                                        
     HSC-IP AIS                          0.0%    0.0%    0.0%     0.0%     0.0%     0.0%    35.0%    40.0%    50.0%    50.0%
     HSC-I U-GD                          0.0%    0.0%    0.0%     0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%
     HSC-GT                              0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    50.0%
     HSC-TI                              0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
     HSC-IP Leukemia                     0.0%    0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
<CAPTION>
Schedule of Revenues
                       1996   1997     1998       1999       2000        2001        2002          2003         2004         2005
                       ----   ----     ----       ----       ----        ----        ----          ----         ----         ----
<S>                      <C>   <C>   <C>        <C>        <C>         <C>         <C>          <C>          <C>          <C>       
U.S. Market
  Cancer:
  HSC-IP CLL             $0    $0    $     0    $     0    $    266    $  2,628    $    4,397   $    6,510   $    8,379   $   10,353
  HSC-IP NHL              -     -       --        5,102      36,036      56,700        82,827      107,184      110,408      113,715
  HSC-IP MM               -     -       --        1,416       9,726      15,023        21,663       26,030       26,817       27,615
  HSC-IP Breast Cancer    -     -       --        2,854      32,919      79,113       159,651      184,995      238,181      245,327

  HSC-IP AIS              -     -       --         --          --        63,579       171,140      323,764      444,638      457,973
  HSC-IU-GD               -     -       --         --         5,400      12,528        21,480       32,472       36,468       37,584
  HSC-GT                  -     -       --         --          --         3,919        64,576      149,652      274,024      529,220
  HSC-TI                  -     -       --         --          --          --            --           --         20,968       92,256
  HSC-IP Leukemia         -     -       --         --          --          --            --         29,272       75,978      130,424

Total U.S. Market        $0    $0    $     0    $ 9,372    $ 84,347    $233,489    $  525,734   $  859,878   $1,235,860   $1,644,466

Europe:
  Cancer:
  HSC-IP CLL             $0    $0    $   300    $ 1,044    $  1,530    $  3,422    $    5,285   $    7,812   $   10,059   $   12,432
  HSC-IP NUL              -     -      6,793     32,652      48,045      66,807        98,123      119,438      132,479      136,458
  HSC-IP MM               -     -      2,475      9,066      14,588      21,636        30,335       31,238       32,183       33,149
  HSC-IP Breast Cancer    -     -      4,521     23,285      67,155     121,046       162,842      188,694      242,942      250,232

  HSC-IP AIS              -     -       --         --          --        76,295       205,364      388,517      533,565      549,570
  HSC-IU-GD               -     -       --         --         1,380      12,771        21,930       33,132       37,224       38,340
  HSC-GT                  -     -       --         --          --          --          15,498      107,748      213,744      359,870
  HSC-TI                  -     -       --         --          --          --            --           --          8,912       39,210
  HSC-IP Leukemia         -     -       --         --          --          --            --           --         51,664       99,774

Total Europe Market      $0    $0    $14,089    $66,047    $132,698    $301,976    $  539,375   $  876,578   $1,262,771   $1,519,034

Japan:
  Cancer:
  HSC-IP CLL             $0    $0    $     0    $     0    $    133    $  1,314    $    2,204   $    3,255   $    4,190   $    5,177
  HSC-IP NUL              -     -       --         --         3,003      18,558        29,205       42,660       55,199       56,858
  HSC-IP MM               -     -       --         --           547       4,008         6,450        9,567       13,409       13,808
  HSC-IP Breast Cancer    -     -       --         --           617       7,347        22,617       43,164       61,925       73,598

  HSC-IP AIS              -     -       --         --          --          --           9,167       71,946      129,683      190,823
  HSC-I U-GD              -     -       --         --          --          --           1,284        5,643        9,870       14,652
  HSC-GT                  -     -       --         --          --          --            --          5,986       46,242      114,660
  HSC-TI                  -     -       --         --          --          --            --           --           --            112
  HSC-IP Leukemia         -     -       --         --          --          --            --           --           --         27,716
  Total Japan Market     $0    $0    $     0    $     0       $4300    $ 31,227    $   70,926   $  182,221   $  320,516   $  497,402
Total Product Revenues   $0    $0    $14,089    $75,418    $22l,345    $566,693    $1,136,035   $1,918,677   $2,819,146   $3,660,902
</TABLE>


<PAGE>

[Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
Schedule of U.S. and Europe Revenues                 1996     1997      1998        1999         2000         2001           2002   
                                                     ----     ----      ----        ----         ----         ----           ----   
<S>                                                  <C>      <C>      <C>         <C>         <C>          <C>          <C>        
US and Europe
     Cancer:
     HSC-IP CLL                                      $  0     $  0     $   300     $ 1,044     $  1,796     $  6,050     $    9,682 
     HSC-IP NUL                                       --       --        6,793      37,754       84,081      123,507        180,950 
     HSC-IP MM                                        --       --        2,475      10,482       24,314       36,659         51,998 
     HSC-IP Breast Cancer                             --       --        4,521      26,138      100,074      200,159        322,493 
                                                     ----     ----     -------     -------      -------      -------      --------- 
     Total Cancer                                     --       --       14,089      75,418      210,265      366,374        565,121 

     HSC-IP AIS                                       --       --         --          --           --        139,874        376,504 
     HSC-IU-GD                                        --       --         --          --          6,780       25,299         43,410 
     HSC-GT                                           --       --         --          --           --          3,919         80,074 
     HSC-TI                                           --       --         --          --           --           --             --   
     HSC-IP Leukemia                                  --       --         --          --           --           --             --   
     Total U.S. and Europe                           $  0     $  0     $14,089     $75,418      217,045      535,466      1,065,109 

Schedule of HIV Profit Distribution
Eligible Patients
     HSC-GT HIV (Symptom/Asymtom) - US                --       --         --          --           --          2,547         29,136 
     HSC-GT HIV (Symptom/Asymtom) - EU                --       --         --          --           --           --            3,722 
     HSC-GT HIV (Symptom/Asympt) - JPN                --       --         --          --           --           --             --   

Market Share per Sprint's Business Plan
     HSC-GT HIV (Symptom/Asympt) - US                 0.0%     0.0%        0.0%        0.0%         0.0%        50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - EU                 0.0%     0.0%        0.0%        0.0%         0.0%         0.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - JPN                0.0%     0.0%        0.0%        0.0%         0.0%         0.0%           0.0%

Market Share adjusted for Product Launch Delays
     HSC-GT HIV (Symptom/Asympt) - US                 0.0%     0.0%        0.0%        0.0%         0.0%        50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - EU                 0.0%     0.0%        0.0%        0.0%         0.0%         0.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - JPN                0.0%     0.0%        0.0%        0.0%         0.0%         0.0%           0.0%

Revenues
     HSC-GT HIV (Symptom/Asympt) - US                $  0     $  0     $     0     $     0     $      0     $ 25,470     $  291,360 
     HSC-GT HIV (Symptom/Asympt) - EU                 --       --         --          --           --           --           37,220 
     HSC-GT HIV (Symptom/Asympt) - JPN                --       --         --          --           --           --             --   


     Total HIV Revenues                               --       --         --          --           --         25,470        328,580 
     Cost of goods sold                               --       --         --          --           --          6,183         79,763 
     SG&A (per Sandoz)                                --       --         --          --           --          3,820         10,324 
                                                     ----     ----     -------     -------      -------      -------      --------- 
     Operating profit                                 --       --         --          --           --         15,467        238,493 

     Special advance repayment                        --       --         --          --           --          5,238         53,834 
     Number of Centers Rolled Out (Sprint)            --       --         --          --           --              1              1 
     Number of Centers built @ 15,000 
       patients/center                                --       --         --          --           --              1              1 
     Cost                                             --       --         --          --           --         10,229         10,229 

     Profit available for distribution                --       --         --          --           --              0        174,430 
     HSC-GT HIV Profit Distribution                  $  0     $  0     $     0     $     0     $      0     $      0     $   87,215 

<CAPTION>
Schedule of U.S. and Europe Revenues                   2003            2004            2005
                                                       ----            ----            ----
<S>                                                 <C>            <C>            <C>       
US and Europe
     Cancer:
     HSC-IP CLL                                     $   14,322     $   18,438     $   22,785
     HSC-IP NUL                                        226,622        242,886        250,173
     HSC-IP MM                                          57,267         59,000         60,764
     HSC-IP Breast Cancer                              373,689        481,122        495,558
                                                     ---------      ---------      ---------
     Total Cancer                                      671,900        801,446        829,280

     HSC-IP AIS                                        712,280        978,203      1,007,543
     HSC-IU-GD                                          65,604         73,692         75,924
     HSC-GT                                            257,400        487,768        889,090
     HSC-TI                                               --           29,880        131,466
     HSC-IP Leukemia                                    29,272        127,642        230,198
     Total U.S. and Europe                           1,736,456      2,498,630      3,163,500

Schedule of HIV Profit Distribution
Eligible Patients
     HSC-GT HIV (Symptom/Asymtom) - US                  47,591        103,832        125,764
     HSC-GT HIV (Symptom/Asymtom) - EU                  12,460         31,479         42,301
     HSC-GT HIV (Symptom/Asympt) - JPN                    --             --              434

Market Share per Sprint's Business Plan
     HSC-GT HIV (Symptom/Asympt) - US                     50.0%          50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - EU                     50.0%          50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - JPN                     0.0%           0.0%          50.0%

Market Share adjusted for Product Launch Delays
     HSC-GT HIV (Symptom/Asympt) - US                     50.0%          50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - EU                     50.0%          50.0%          50.0%
     HSC-GT HIV (Symptom/Asympt) - JPN                     0.0%           0.0%          50.0%

Revenues
     HSC-GT HIV (Symptom/Asympt) - US               $  475,910     $1,038,320     $1,257,640
     HSC-GT HIV (Symptom/Asympt) - EU                  124,600        314,790        423,010
     HSC-GT HIV (Symptom/Asympt) - JPN                    --             --            4,340


     Total HIV Revenues                                600,510      1,353,110      1,684,990
     Cost of goods sold                                145,774        328,467        409,031
     SG&A (per Sandoz)                                  47,752        143,464        191,394
                                                     ---------      ---------      ---------
     Operating profit                                  406,984        881,179      1,084,565

     Special advance repayment                            --             --             --
     Number of Centers Rolled Out (Sprint)                   2              1           --
     Number of Centers built @ 15,000 
       patients/center                                       1              2              1
     Cost                                               20,458         10,229           --

     Profit available for distribution                 386,526        870,950      1,084,565
     HSC-GT HIV Profit Distribution                 $  193,263     $  435,475     $  542,282
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
Schedule of Other Revenues                                1996        1997        1998        1999        2000        2001      
                                                          ----        ----        ----        ----        ----        ----      
<S>                                                      <C>         <C>         <C>         <C>         <C>         <C>        
Collaborations:
     HIV Gene Therapy                                    $5,445      $6,197      $6,259      $6,322      $6,385      $6,449     
     REV123 TRD                                           4,816       8,063       8,196       8,851       6,735       6,873     
     REV123 CRD                                           2,616       3,818       4,089       4,828       5,158       2,675     
     Gene Discovery                                         500       2,000       2,000       2,000       1,500           -     
     Genentech TPO                                           96           -           -           -           -           -     
     Japan Cell Center Deal                                 375       1,500       1,500       1,125           -           -     
     Double Positive Selection Device                         -         750       3,000       3,000       2,250           -     
     Total Collaborations                   $2,320      $13,848     $22,328     $25,044     $26,126     $22,028     $15,997     

Milestone Payments
     Gene Discovery                                      $2,000        $500      $3,000      $2,000      $3,000      $3,000     
     Japan Cell Center Deal                               3,500       5,500       4,000           -       3,500       5,000     
     Double Positive Selection Device                     3,000       2,000       3,000           -       4,000           -     
     Total Milestone Payments                            $5,500      $9,000      $9,000      $5,000      $6,500     $12,000     

Royalties
    Gene Discovery
     Double Positive Selection Device                                                            25          50         100     
     Japan Product Sales
     HSC-IP CLL                                               -           -           -           -          13         131     
     HSC-IP NHL                                               -           -           -           -         300       1,856     
     HSC-IP MM                                                -           -           -           -          55         401     
     HSC-IP BC                                                -           -           -           -          62         735     

     HSC-IP AIS                                               -           -           -           -           -           -     
     HSC-IU-GD                                                -           -           -           -           -           -     
     HSC-GT                                                   -           -           -           -           -           -     
     HSC-TI                                                   -           -           -           -           -           -     
     HSC-IP Leukemia                                          -           -           -           -           -           -     
     Total Royalties                                         $0          $0          $0         $25        $480      $3,223     
     Grants                                                 145           -           -           -           -           -     
     Other                                                  185         200           -           -           -           -     

<CAPTION>
Schedule of Other Revenues                   2002        2003        2004        2005
                                             ----        ----        ----        ----
<S>                                         <C>          <C>         <C>         <C>
Collaborations:
     HIV Gene Therapy                       $6,513          $0          $0          $0
     REV123 TRD                              6,991           -           -           -
     REV123 CRD                              1,714       1,173           -           -
     Gene Discovery                              -           -           -           -
     Genentech TPO                               -           -           -           -
     Japan Cell Center Deal                      -           -           -           -
     Double Positive Selection Device            -           -           -           -
     Total Collaborations                  $15,218      $1,173          $0          $0

Milestone Payments
     Gene Discovery                         $3,000      $8,000      $5,000          $0
     Japan Cell Center Deal                                  -           -           -
     Double Positive Selection Device            -           -           -           -
     Total Milestone Payments               $3,000      $8,000      $5,000          $0

Royalties
    Gene Discovery                                      $1,000      $4,000      $5,000
     Double Positive Selection Device          200         325         475         600
     Japan Product Sales
     HSC-IP CLL                                220         326         419         518
     HSC-IP NHL                              2,921       4,266       5,520       5,686
     HSC-IP MM                                 645         957       1,341       1,381
     HSC-IP BC                               2,262       4,316       6,192       7,360

     HSC-IP AIS                                917       7,195      12,968      19,082
     HSC-IU-GD                                 128         564         987       1,465
     HSC-GT                                      -         599       4,624      11,466
     HSC-TI                                      -           -           -          11
     HSC-IP Leukemia                             -           -           -       2,772
     Total Royalties                        $7,293     $19,547     $36,527     $55,340
     Grants                                      -           -           -           -
     Other                                       -           -           -           -
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
                                                           1996        1997        1998        1999        2000        2001  
                                                           ----        ----        ----        ----        ----        ----  
<S>                                                        <C>         <C>         <C>         <C>         <C>         <C>   
Mfg. Costs as a % of Revenue Per Sprint's Business Plan    
     HSC-IP CLL                                                                    21.7%       21.7%       21.8%       21.8% 
     HSC-IP NHL                                                                    21.7%       21.7%       21.8%       21.8% 
     HSC-IP MM                                                                     21.7%       21.7%       21.8%       21.8% 
     HSC-IP Breast Cancer                                                          21.7%       21.7%       21.8%       21.8% 

     HSC-IP AIS                                                                                                        21.8% 
     HSC-IU-GD                                                                                              5.4%        5.4% 
     HSC-GT                                                                                                            24.1% 
     HSC-TI                                                                                                                  
     HSC-IP Leukemia                                                                                                         
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)                                                                         24.3% 

Mfg. Costs as a % of Revenue Adjusted for Product Shift
     HSC-IP CLL                                                                    21.7%       21.7%       21.8%       21.8% 
     HSC-IP NUL                                                                    21.7%       21.7%       21.8%       21.8% 
     HSC-IP MM                                                                     21.7%       21.7%       21.8%       21.8% 
     HSC-IP Breast Cancer                                                          21.7%       21.7%       21.8%       21.8% 

     HSC-IP AIS                                                                     0.0%        0.0%        0.0%       21.8% 
     HSC-IU-GD                                                                      0.0%        0.0%        5.4%        5.4% 
     HSC-GT                                                                         0.0%        0.0%        0.0%       24.1% 
     HSC-TI                                                                         0.0%        0.0%        0.0%        0.0% 
     HSC-IP Leukemia                                                                0.0%        0.0%        0.0%        0.0% 
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)                                      0.0%        0.0%        0.0%       24.3% 

Mfg. Costs in $~s Adjusted for Product Shift
     HSC-I P CLL                                                                    $65        $227        $392      $1,319  
     HSC-IP NUL                                                                   1,474       8,193      18,330      26,925  
     HSC-IP MM                                                                      537       2,275       5,300       7,992  
     HSC -IP Breast Cancer                                                          981       5,672      21,816      43,635  

     HSC-IP AIS                                                                       -           -           -      30,493  
     HSC-IU-GD                                                                        -           -         366       1,366  
     HSC -GT                                                                          -           -           -         943  
     HSC-TI                                                                           -           -           -           -  
     HSC-IP Leukemia                                                                  -           -           -           -  

     Manufacturing Costs                                      -           -       3,057      16,366      46,204     112,671  

     MAbs manufacturing costs                            10,704      14,200      14,177      13,318      12,428      12,208  
     Page Mill Cell Center                                2,010       3,030       3,030       2,830       2,210       2,050  
     Lyon Cell Center                                     2,689       3,019       3,099       3,099       3,049       2,789  
     Total Manufacturing Costs                $0        $15,403     $20,249     $23,363     $35,613     $63,891    $129,718  

<CAPTION>
                                                             2002        2003        2004        2005
                                                             ----        ----        ----        ----
Mfg. Costs as a % of Revenue Per Sprint's Business Plan 
<S>                                                          <C>         <C>         <C>         <C>  
     HSC-IP CLL                                              21.8%       21.8%       21.8%       21.8%
     HSC-IP NHL                                              21.8%       21.8%       21.8%       21.8%
     HSC-IP MM                                               21.8%       21.8%       21.8%       21.8%
     HSC-IP Breast Cancer                                    21.8%       21.8%       21.8%       21.8%

     HSC-IP AIS                                              21.8%       21.8%       21.8%       21.8%
     HSC-IU-GD                                                5.4%        5.5%        5.4%        5.5%
     HSC-GT                                                  24.1%       24.1%       24.1%       24.1%
     HSC-TI                                                                          16.3%       16.4%
     HSC-IP Leukemia                                                     16.6%       16.6%       16.6%
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)               24.3%       24.3%       24.3%       24.3%

Mfg. Costs as a % of Revenue Adjusted for Product Shift
     HSC-IP CLL                                              21.8%       21.8%       21.8%       21.8%
     HSC-IP NUL                                              21.8%       21.8%       21.8%       21.8%
     HSC-IP MM                                               21.8%       21.8%       21.8%       21.8%
     HSC-IP Breast Cancer                                    21.8%       21.8%       21.8%       21.8%

     HSC-IP AIS                                              21.8%       21.8%       21.8%       21.8%
     HSC-IU-GD                                                5.4%        5.5%        5.4%        5.5%
     HSC-GT                                                  24.1%       24.1%       24.1%       24.1%
     HSC-TI                                                   0.0%        0.0%       16.3%       16.4%
     HSC-IP Leukemia                                          0.0%       16.6%       16.6%       16.6%
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)               24.3%       24.3%       24.3%       24.3%

Mfg. Costs in $~s Adjusted for Product Shift
     HSC-I P CLL                                           $2,111      $3,122      $4,019      $4,967
     HSC-IP NUL                                            39,447      49,403      52,949      54,538
     HSC-IP MM                                             11,335      12,484      12,862      13,246
     HSC -IP Breast Cancer                                 70,303      81,464     104,885     108,032

     HSC-IP AIS                                            82,078     155,277     213,248     219,644
     HSC-IU-GD                                              2,366       3,576       4,016       4,138
     HSC -GT                                               19,262      61,918     117,333     213,871
     HSC-TI                                                     -           -       4,870      21,495
     HSC-IP Leukemia                                            -       4,859      21,189      38,213

     Manufacturing Costs                                  226,902     372,104     535,371     678,144

     MAbs manufacturing costs                              12,208      12,208      12,208      12,208
     Page Mill Cell Center                                  2,091       2,133       2,175       2,219
     Lyon Cell Center                                       2,845       2,902       2,960       3,019
     Total Manufacturing Costs                           $244,046    $389,347    $552,714    $695,590
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
                                                  1995        1996         1997       1998         1999         2000      2001   
                                                  ----        ----         ----       ----         ----         ----      ----   
<S>                                              <C>          <C>         <C>         <C>         <C>         <C>        <C>     
Schedule of Research & Development
  Internal research programs                                  $8,604      $8,690      $8,777      $9,040      $9,312          
  Internal development programs                               12,761      14,113      14,745      15,187      15,643
  Internal clinical program                                    4,070       5,586      11,836      12,191      12,557
  HIV Gene Rx Research program                                 6,136       6,197       6,259       6,447       6,640
  REV 123 development program                                  4,807       8,063       8,196       8,442       8,695
  REV 123 clinical program                                     2,616       3,818       4,089       4,212       4,338
  Technology acquisitions                                        990       1,500       1,500       1,545       1,591
  Total Research & Development                   $46,733     $39,984     $47,967     $55,402     $57,064     $58,776     $85,003 

Schedule of SG&A
  G&A                                                         $5,010      $5,160      $5,315      $5,475      $5,639
  US business development                                      1,341       1,908       1,965       2,024       2,085
  EU business development                                        384         509         524         540         556
  US marketing I sales                                             -           -       1,211       1,505       2,015
  EU marketing I sales                                             -           -         550         748       1,089
  Total SG&A                                      $8,110      $6,735      $7,577      $9,566     $10,292     $11,384     $28,334 

    Total Operating Expenses                      54,843      62,122      75,793      88,331     102,969     134,051     243,055 

  EBIT                                          ($51,227)   ($42,444)   ($44,265)   ($40,198)     $3,601    $112,002    $323,631 

Schedule of Net Operating Losses and Taxes
Net Operating Loss
  NOL, beginning of year                                   ($120,000)  ($162,444)  ($206,709)  ($243,306)  ($131,304)         $0 
  NOL utilization                                            (42,444)    (44,265)    (40,198)      3,601     112,002     131,304
  NOL, end of year                                          (162,444)   (206,709)   (246,907)   (243,306)   (131,304)          -

  Income taxes                                        $0          $0          $0          $0          $0          $0     $78,854 

<CAPTION>
                                                  2002        2003        2004        2005
                                                  ----        ----        ----        ----
<S>                                              <C>         <C>         <C>          <C>    
Schedule of Research & Development
  Internal research programs                    
  Internal development programs                 
  Internal clinical program                     
  HIV Gene Rx Research program                  
  REV 123 development program                   
  REV 123 clinical program                      
  Technology acquisitions                       
  Total Research & Development                   $176,675    $293,766    $446,345     564,168

Schedule of SG&A
  G&A                                           
  US business development                       
  EU business development                       
  US marketing I sales                          
  EU marketing I sales                          
  Total SG&A                                      $58,892     $97,922    $148,782    $188,056

    Total Operating Expenses                      479,613     781,035   1,147,840   1,447,814

  EBIT                                           $698,222  $1,177,404  $1,827,791  $2,313,308

Schedule of Net Operating Losses and Taxes
Net Operating Loss
  NOL, beginning of year                               $0          $0          $0          $0
  NOL utilization                                       -           -           -           -
  NOL, end of year                                      -           -           -           -

  Income taxes                                   $286,271    $482,736    $749,394    $948,456
</TABLE>

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
<CAPTION>
Schedule of Capital Expenditures         Cost       1996        1997         1998        1999        2000         2001        2002
                                     ---------   ---------   ---------    ---------   ---------   ---------    ---------   ---------
<S>                                     <C>            <C>         <C>          <C>         <C>         <C>         <C>          <C>
Number of Facilities                 
  Convertible HSCS - equipment           5,191           0           1            1           0           0            0           0
  Convertible HSCS - Improvements        4,200           0           1            1           0           0            0           0
  Equipment on lease                    10,772           0           0            0           1           0            0           0
  DPSD - equipment                       3,992           0           0            0           0           2            1           2
  DPSD - Improvements                    4,200           0           0            0           0           2            1           2
  Conversion - equipment                 1,536           0           0            0           0           0            2           0
  Conversion - improvements                250           0           0            0           0           0            2           0
  HIV - equipment                        4,529           0           0            0           0           0            0           0
  HIV - improvements                     5,700           0           0            0           0           0            0           0

Capital expenditures                  
  Beginning equipment/building imp.                $60,776     $63,551      $77,739     $92,670    $109,148     $131,410    $151,674
  R&D related equipment                              2,775       4,797        5,540       5,706       5,878        8,500      17,668
  Convertible HSCS - equipment                           -       5,191        5,191           -           -            -           -
  Convertible HSCS - Improvements                        -       4,200        4,200           -           -            -           -
  Equipment on lease                                     -           -            -      10,772           -            -           -
  DPSD - equipment                                       -           -            -           -       7,984        3,992       7,984
  DPSD - Improvements                                    -           -            -           -       8,400        4,200       8,400
  Conversion - equipment                                 -           -            -           -           -        3,072           -
  Conversion - improvements                              -           -            -           -           -          500           -
  HIV - equipment                                        -           -            -           -           -            -           -
  HIV - improvements                                     -           -            -           -           -            -           -
Total capital expenditures               4,259       2,775      14,188       14,931      16,478      22,262       20,264      34,052
  Ending Equipment/Building Imp.                   $63,551     $77,739      $92,670    $109,148    $131,410     $151,674    $185,726

Depreciation and amortization
  Equipment                                         
  R&D related equipment                             $2,775      $4,797       $5,540      $5,706      $5,878       $8,500     $17,668
  Convertible HCSC - equipment                           -       5,191        5,191           -           -            -           -
  DPSD - equipment                                       -           -            -           -       7,984        3,992       7,984
  Conversion - equipment                                 -           -            -           -           -        3,072           -
  HIV - equipment                                        -           -            -           -           -            -           -
  Total                                             $2,775      $9,988      $10,731      $5,706     $13,862      $15,564     $25,652
                                                    
Improvements
  Convertible HSCS - Improvements                       $0      $4,200       $4,200          $0          $0           $0          $0
  DPSD - Improvements                                    -           -            -           -       8,400        4,200       8,400
  Conversion - improvements                              -           -            -           -           -          500           -
  HIV - improvements                                     -           -            -           -           -            -           -
  Total Improvements                                    $0      $4,200       $4,200          $0      $8,400       $4,700      $8,400
</TABLE>

Schedule of Capital Expenditures             2003         2004        2005
                                         ----------  -----------  ----------
Number of Facilities                     
  Convertible HSCS - equipment                    0            0           0
  Convertible HSCS - Improvements                 0            0           0
  Equipment on lease                              0            0           0
  DPSD - equipment                                2            1           0
  DPSD - Improvements                             2            1           0
  Conversion - equipment                          0            0           0
  Conversion - improvements                       0            0           0
  HIV - equipment                                 0            0           0
  HIV - improvements                              0            0           0

Capital expenditures                       
  Beginning equipment/building imp.        $185,726     $231,486    $284,313
  R&D related equipment                      29,377       44,634      56,417
  Convertible HSCS - equipment                    -            -           -
  Convertible HSCS - Improvements                 -            -           -
  Equipment on lease                              -            -           -
  DPSD - equipment                            7,984        3,992           -
  DPSD - Improvements                         8,400        4,200           -
  Conversion - equipment                          -            -           -
  Conversion - improvements                       -            -           -
  HIV - equipment                                 -            -           -
  HIV - improvements                              -            -           -
Total capital expenditures                   45,761       52,826      56,417
  Ending Equipment/Building Imp.           $231,486     $284,313    $340,730

Depreciation and amortization
  Equipment                                 
  R&D related equipment                     $29,377      $44,634     $56,417
  Convertible HCSC - equipment                    -            -           -
  DPSD - equipment                            7,984        3,992           -
  Conversion - equipment                          -            -           -
  HIV - equipment                                 -            -           -
  Total                                     $37,361      $48,626     $56,417

Improvements
  Convertible HSCS - Improvements                $0           $0          $0
  DPSD - Improvements                         8,400        4,200           -
  Conversion - improvements                       -            -           -
  HIV - improvements                              -            -           -
  Total Improvements                         $8,400       $4,200          $0

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================
<TABLE>
<CAPTION>
Schedule of Capital Expenditures     
and Depreciation                                   1996         1997        1998        1999         2000        2001        2002   
                                               ----------   ----------   ----------  ---------   ----------   ---------   --------- 
<S>                                  <C>           <C>          <C>         <C>         <C>          <C>       <C>         <C>
Depreciation
  Equipment - 1996                                   $555         $555        $555        $555         $555                         
  Equipment - 1997                                               1,998       1,998       1,998        1,998       1,998             
  Equipment - 1998                                                           2,146       2,146        2,146       2,146       2,146 
  Equipment - 1999                                                                       1,141        1,141       1,141       1,141 
  Equipment - 2000                                                                                    2,772       2,772       2,772 
  Equipment - 2001                                                                                                3,113       3,113 
  Equipment - 2002                                                                                                            5,130 
  Equipment - 2003                                                                                                                  
  Equipment - 2004                                                                                                                  
  Equipment - 2005                                                                                                                  
  Total Depreciation - Equipment                     $555       $2,553      $4,699      $5,840       $8,612     $11,170     $14,303 

  Improvements - existing assets                   $9,454        9,585       9,085       6,085        4,586       4,140       5,138 
  Improvements - 1996                                   0                                                                           
  Improvements - 1997                                              140         140         140          140         140         140 
  Improvements - 1998                                                          140         140          140         140         140 
  Improvements - 1999                                   -            -           -           -            -           -           - 
  Improvements - 2000                                                                                   280         280         280 
  Improvements - 2001                                                                                               157         157 
  Improvements - 2002                                                                                                           280 
  Improvements - 2003                                                                                                               
  Improvements - 2004                                                                                                               
  Improvements - 2005                                                                                                               
  Total Depreciation - Improvements                $9,454       $9,725      $9,365      $6,365       $5,146      $4,857      $6,134 

  Total Depreciation                   $9,472     $10,009      $12,278     $14,064     $12,205      $13,758     $16,027     $20,437 
</TABLE>

Schedule of Capital Expenditures     
and Depreciation                          2003        2004        2005
                                       ---------   ---------    ---------
Depreciation
  Equipment - 1996                                                      
  Equipment - 1997                                                      
  Equipment - 1998                                                      
  Equipment - 1999                         1,141                        
  Equipment - 2000                         2,772       2,772
  Equipment - 2001                         3,113       3,113       3,113
  Equipment - 2002                         5,130       5,130       5,130
  Equipment - 2003                         7,472       7,472       7,472
  Equipment - 2004                                     9,725       9,725
  Equipment - 2005                                                11,283
  Total Depreciation - Equipment         $19,629     $28,213     $36,724

  Improvements - existing assets           6,284       6,425       8,197
  Improvements - 1996                                                   
  Improvements - 1997                        140         140         140
  Improvements - 1998                        140         140         140
  Improvements - 1999                          -           -           -
  Improvements - 2000                        280         280         280
  Improvements - 2001                        157         157         157
  Improvements - 2002                        280         280         280
  Improvements - 2003                        280         280         280
  Improvements - 2004                                    140         140
  Improvements - 2005                                                  -
  Total Depreciation - Improvements       $7,561      $7,842      $9,614

  Total Depreciation                     $27,189     $36,055     $46,338

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
Depreciation - HIV Centers                   Cost       1996       1997        1998       1999       2000        2001        2002   
                                          ---------  ---------   --------   ---------   --------  ---------   ---------   --------- 
<S>                                           <C>         <C>        <C>         <C>        <C>        <C>         <C>         <C>
Schedule of Capital Expenditures - HIV
  HIV - equipment                             4,529          0          0           0          0          0           1           2 
  HIV - improvements                          5,700          0          0           0          0          0           1           2 

  HIV - equipment                                           $0         $0          $0         $0     $4,529      $9,058      $4,529 
  HIV - improvements                                         -          -           -          -      5,700      11,400       5,700 

Schedule of Depreciation - HIV
Depreciation
  Equipment - 1996                                        $0.0       $0.0        $0.0       $0.0       $0.0                         
  Equipment - 1997                                                      -           -          -          -           -             
  Equipment - 1998                                                                  -          -          -           -          -  
  Equipment - 1999                                                                             -          -           -          -  
  Equipment - 2000                                                                                      906         906         906 
  Equipment - 2001                                                                                                1,812       1,812 
  Equipment - 2002                                                                                                              906 
  Equipment - 2003                                                                                                                  
  Equipment - 2004                                                                                                                  
  Equipment - 2005                                                                                                                  
  Total Depreciation - HIV Equipment                        $0         $0          $0         $0       $906      $2,717      $3,623 

  Improvements - 1996                                       $0         $0          $0         $0         $0          $0          $0 
  Improvements - 1997                                                   -           -          -          -           -           - 
  Improvements - 1998                                                               -          -          -           -           - 
  Improvements - 1999                                                                          -          -           -           - 
  Improvements - 2000                                                                                   190         190         190 
  Improvements - 2001                                                                                               380         380 
  Improvements - 2002                                                                                                           190 
  Improvements - 2003                                                                                                               
  Improvements - 2004                                                                                                               
  Improvements - 2005                                                                                                               
  Total Depreciation - HIV Improvements                     $0         $0          $0         $0       $190        $570        $760 

  Total Depreciation - HIV                                   -          -           -          -      1,096       3,287       4,383 

Depreciation - Sprint (50%)                                 $0         $0          $0         $0       $548      $1,644      $2,192 
</TABLE>

Depreciation - HIV Centers                    2003         2004        2005
                                           ---------    ---------   ---------
Schedule of Capital Expenditures - HIV
  HIV - equipment                                  1            2           1
  HIV - improvements                               1            2           1

  HIV - equipment                             $9,058       $4,529          $0
  HIV - improvements                          11,400        5,700           -

Schedule of Depreciation - HIV
Depreciation
  Equipment - 1996                                                           
  Equipment - 1997                                                           
  Equipment - 1998                                                           
  Equipment - 1999                                -                          
  Equipment - 2000                               906          906
  Equipment - 2001                             1,812        1,812       1,812
  Equipment - 2002                               906          906         906
  Equipment - 2003                             1,812        1,812       1,812
  Equipment - 2004                                            906         906
  Equipment - 2005                                                          -
  Total Depreciation - HIV Equipment          $5,435       $6,341      $5,435

  Improvements - 1996                             $0           $0          $0
  Improvements - 1997                              -            -           -
  Improvements - 1998                              -            -           -
  Improvements - 1999                              -            -           -
  Improvements - 2000                            190          190         190
  Improvements - 2001                            380          380         380
  Improvements - 2002                            190          190         190
  Improvements - 2003                            380          380         380
  Improvements - 2004                                         190         190
  Improvements - 2005                                                       -
  Total Depreciation - HIV Improvements       $1,140       $1,330      $1,330

  Total Depreciation - HIV                     6,575        7,671       6,765

Depreciation - Sprint (50%)                   $3,287       $3,835      $3,382

<PAGE>

Valuation Analysis (Sprint Projections)
================================================================================

<TABLE>
<CAPTION>
Schedule of Working Capital               1995       1996       1997        1998       1999       2000        2001       2002    
                                        --------   --------   --------    --------   --------   --------    --------   --------
<S>                                         <C>        <C>        <C>       <C>        <C>       <C>         <C>        <C>      
  Current assets
  A/R                                       $256       $200       $200      $1,127     $6,035    $17,402     $43,095    $92,769  
  Other current assets                     1,336        700        700         700        700        700         700        700  
                                        --------   --------   --------    --------   --------   --------    --------   --------
  Total current assets                     1,592        900        900       1,827      6,735     18,102      43,795     93,469  

  Current liabilities
  A/P and accruals                         6,681      6,559      7,579       8,833     10,297     13,405      24,305     47,961  
  Current portion of accrued rent             69          -          -           -        827        827         827        827  
  Noncurrent portion of accrued rent       4,565      4,723      4,841       4,959      4,132      3,305       2,478      1,651  
  Deferred revenue                         3,097      2,958      2,233       2,504      2,613      2,203       1,600      1,522  
                                        --------   --------   --------    --------   --------   --------    --------   --------
  Total current liabilities               14,412     14,240     14,653      16,296     17,868     19,740      29,210     51,961  

  Net working capital                    (12,820)   (13,340)   (13,753)    (14,469)   (11,133)    (1,638)     14,585     41,508  
  Net Investment in Working Capital           $0        520        413         716     (3,336)    (9,495)    (16,223)   (26,923) 

Schedule of Common Stock

  Beginning common stock                $246,679   $246,679   $246,679    $270,179   $317,179   $317,179    $317,179   $317,179  
  Shares issued                                -          -      1,471       1,786          -          -           -          -  
  Price                                        -          -         17          28          -          -           -          -  
  Discount                                   6.0%       6.0%       6.0%        6.0%       6.0%       6.0%        6.0%       6.0% 
  Net proceeds                                 -          -     23,500      47,000          -          -           -          -  
  Ending common stock                   $246,679   $246,679   $270,179    $317,179   $317,179   $317,179    $317,179   $317,179  

Schedule of Shares Outstanding

  Beginning shares outstanding                       14,470     14,470      15,940     17,726     17,726      17,726     17,726  
  Shares issued                                           -      1,471       1,786          -          -           -          -  
  Ending shares outstanding               14,028     14,470     15,940      17,726     17,726     17,726      17,726     17,726  
</TABLE>

Schedule of Working Capital                 2003         2004        2005
                                         ---------    ---------   ---------
  Current assets
  A/R                                     $155,941     $237,651    $300,890
  Other current assets                         700          700         700
                                         ---------    ---------   ---------
  Total current assets                     156,641      238,351     301,590

  Current liabilities
  A/P and accruals                          78,103      114,784     144,781
  Current portion of accrued rent              827          824           -
  Noncurrent portion of accrued rent           824            -           -
  Deferred revenue                             117            -           -
                                         ---------    ---------   ---------
  Total current liabilities                 79,872      115,608     144,781

  Net working capital                       76,770      122,743     156,808
  Net Investment in Working Capital        (35,261)     (45,973)    (34,066)

Schedule of Common Stock

  Beginning common stock                  $317,179     $317,179    $317,179
  Shares issued                                  -            -           -
  Price                                          -            -           -
  Discount                                     6.0%         6.0%        6.0%
  Net proceeds                                   -            -           -
  Ending common stock                     $317,179     $317,179    $317,179

Schedule of Shares Outstanding

  Beginning shares outstanding              17,726       17,726      17,726
  Shares issued                                  -            -           -
  Ending shares outstanding                 17,726       17,726      17,726


<PAGE>

Sprint Discounted Cash Flow Analysis
================================================================================
Discounted Cash Flow Analysis
Terminal Year: 2005 (EBIT)
(Sensitivity Case 1)

<TABLE>
<CAPTION>
    Discount rate                               35.0%                        40.0%                        45.0%          
                                      -------------------------    -------------------------    -------------------------
                                      -----     -----     -----    -----     -----     -----    -----     -----     -----
     EBIT mulitple                    11.Ox     13.Ox     15Ox     11.Ox     13.Ox     15Ox     11.Ox     13.Ox     15.Ox
                                      -----     -----     -----    -----     -----     -----    -----     -----     -----
<S>                                   <C>       <C>       <C>      <C>       <C>       <C>      <C>       <C>       <C>  
Cash flows, 1997 to 2005               31.8      31.8      31.8     13.2      13.2      13.2      0.1       0.1       0.1

Terminal value, 2005                  396.0     468.0     540.0    285.4     337.3     389.2    208.1     246.0     283.8
                                      -----     -----     -----    -----     -----     -----    -----     -----     -----

Enterprise Value                      427.7     499.7     571.7    298.7     350.6     402.5    208.2     246.0     283.9

Plus: Option proceeds                  28.4      28.4      28.4     28.4      28.4      28.4     28.4      28.4      28.4

Plus: Cash and investments             25.0      25.0      25.0     25.0      25.0      25.0     25.0      25.0      25.0

Plus: Residual NOL                      --        --        --       --        --        --       --        --        -- 

Less: Total debt                       (6.0)     (6.0)     (6.0)    (6.0)     (6.0)     (6.0)    (6.0)     (6.0)     (6.0

Equity Value                          475.1     547.1     619.1    346.1     398.0     449.9    255.6     293.4     331.3

Fully-diluted shares outstanding       16.2      16.2      16.2     16.2      16.2      16.2     16.2      16.2      16.2

Equity Value Per Share                $29.34    $33.79    $38.23   $21.37    $24.58    $27.78   $15.78    $18.12    $20.46
                                      ------------------------------------------------------------------------------------
</TABLE>

    Discount rate                               50.0%             
                                      -------------------------   
                                      -----     -----     -----   
     EBIT mulitple                     11.Ox    13.Ox     15.Ox   
                                      -----     -----     -----   
                                                                  
Cash flows, 1997 to 2005               (9.3)     (9.3)     (9.3)  
                                                                  
Terminal value, 2005                  153.4     181.3     209.2   
                                      -----     -----     -----   
                                                                  
Enterprise Value                      144.1     172.0     199.8   
                                                                  
Plus: Option proceeds                  28.4      28.4      28.4   
                                                                  
Plus: Cash and investments             25.0      25.0      25.0   
                                                                  
Plus: Residual NOL                      --        --        --    
                                                                  
Less: Total debt                       (6.0)     (6.0)     (6.0)  
                                                                  
Equity Value                          191.5     219.4     247.2   
                                                                  
Fully-diluted shares outstanding       16.2      16.2      16.2   
                                                                  
Equity Value Per Share                $11.82    $13.55    $15.27  
                                      --------------------------

<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
                                1996      1997     1998     1999     2000    2001     2002     2003      2004        2005
                                -----     ----     ----     ----     ----    ----     -----    -----     -----       -----
<S>                            <C>       <C>      <C>      <C>      <C>      <C>      <C>      <C>       <C>         <C>  
EBIT                            (42.4)   (44.3)   (44.6)   (19.8)     8.6    102.4    157.9    252.0     401.8       536.1
% of revenues                   -216%    -140%    -106%     -27%        6%      38%      35%      36%       39%       40%
% growth                           NM       NM       NM       NM       NM     1097%      54%      60%       59%       33%

Taxes                            --       --       --       --       --       --       --      102.4     164.7       219.8
                                -----     ----     ----     ----     ----    ----     -----    -----     -----       -----
% EBIT                              0%       0%       0%       0%       0%       0%       0%      41%       41%       41%

EBIT, after tax                 (42.4)   (44.3)   (44.6)   (19.8)     8.6    102.4    157.9    149.6     237.1       316.3

Depreciation                     10.0     12.3     14.1     12.2     14.3     15.7     17.9     21.4      25.0        27.6
% capital expenditures              0%       0%       0%       0%       0%       0%       0%       0%        0%        0%

Other non-cash charges (HIV d    --       --       --       --        0.5      0.5      0.5      1.1       1.6         1.2
                                -----     ----     ----     ----     ----    ----     -----    -----     -----       -----

Operating cash flow             (32.4)   (32.0)   (30.5)    (7.6)    23.4    118.6    176.3    172.1     263.7       345.1
% revenues                      -165%    -101%     -73%     -10%       16%      44%      39%      25%       26%       26%

Investment in working capital     0.5      0.4      1.1     (1.8)    (5.8)   (10.3)    (8.4)   (13.5)    (15.2)      (14.3)
%Change in revenues                NM        3%      10%     -6%      -8%      -9%      -5%      -5%       -5%         -4%

Capital expenditures             (2.8)   (14.2)   (14.9)   (16.5)   (22.3)   (15.8)   (23.1)   (26.9)    (23.6)      (20.3)
                                -----     ----     ----     ----     ----    ----     -----    -----     -----       -----
% revenues                         14%      45%      36%      22%      15%       6%       5%       4%        2%        2%

Unlevered Free Cash Flows       (34.7)   (45.8)   (44.4)   (25.8)    (4.7)    92.5    144.7    131.7     224.9       310.6
                                =====     ====     ====     ====     ====    ====     =====    =====     =====       =====
% revenues                      -176%     -145%    -106%    -35%      -3%      -34%      32%      19%       22%       23%
% growth                           NM       NM       NM       NM       NM       NM       NM       NM        NM        NM


Schedule of Net Operating Losses and Taxes
Net Operating Loss
NOL, beginning of year          ($120)   ($162)   ($207)   ($251)   ($271)   ($263)   ($160)     ($2)      $0         $0
NOL utilization                   (42)     (44)     (45)     (20)       9      102      158        2      --        --
NOL, end of year                 (162)    (207)    (251)    (271)    (263)    (160)      (2)    --        --        --

Income taxes                       $0       $0       $0       $0       $0       $0       $0     $102      $165      $220
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
                                   1996       1997       1998       1999       2000    2001      2002      2003    2004        2005
                                  -------    -------    -------    -------    ------  ------    ------    ------  -------    -------
<S>                              <C>        <C>        <C>        <C>        <C>     <C>       <C>       <C>     <C>        <C>  
REVENUES
 Cancer:
 HSC-IP CLL                         $0.0       $0.0       $0.2       $0.6     $1.0    $3.4      $5.4      $8.0     $10.3      $12.8
 HSC-IP MIL                         --         --          3.8       21.1     47.1    69.2     101.3     126.9     136.0      140.1
 HSC-IP MM                          --         --          1.4        5.9     13.6    20.5      29.1      32.1      33.0       34.0
 HSC-IP Breast Cancer               --         --          2.5       14.6     56.0   112.1     180.6     209.3     269.4      277.5
 HSC-IP AIS                         --         --         --         --       --      19.6      52.7      99.7     136.9      141.1
 HSC-IU-GD                          --         --         --         --        3.8    14.2      24.3      36.7      41.3       42.5
 HSC-GT                             --         --         --         --       --       1.6      33.6     108.1     204.9      373.4
 HSC-TI                             --         --         --         --       --      --        --        --        15.7       69.0
 HSC-IP Leukemia                    --         --         --         --       --      --        --        16.4      71.5      128.9
 HSC - GT HIV Profit Distributi     --         --         --         --       --      --         0.4      45.1      89.7      109.8
 Total Product Revenues             --         --          7.9       42.2    121.5   240.6     427.5     682.3   1,008.8    1,329.1
 % growth                              0%         0%         0%       435%     188%     98%       78%       60%       48%      32%


 Collaborative research             13.8       22.3       25.0       26.1     22.0    16.0      15.2       1.2      --       --
 Milestone payments                  5.5        9.0        9.0        5.0      6.5    12.0       3.0       8.0       5.0     --
 Grants                              0.1       --         --         --       --      --        --        --        --       --
 Royalties                          --         --         --          0.0      0.3     1.8       3.8       8.4      16.3       23.8
 Other                               0.2        0.2       --         --       --      --        --        --        --       --
Total Revenues                      19.7       31.5       41.9       73.4    150.4   270.4     449.5     699.9   1,030.1    1,352.9
 % growth                              0%        60%        33%        75%     105%     80%       66%       56%       47%        31%
OPERATING EXPENSES
Manufacturing                       15.4       20.2       21.6       25.8     60.5    86.9     156.8     238.0     319.2      410.9
 % revenues                           78%        64%        51%        35%      40%     32%       35%       34%       31%        30%
Research & development              40.0       48.0       55.4       57.1     58.8    40.6      67.4     105.0     154.5      202.9
 % revenues                          203%       152%       132%        78%      39%     15%       15%       15%       15%        15%
Selling, general & administrative    6.7        7.6        9.6       10.3     22.6    40.6      67.4     105.0     154.5      202.9
 % revenues                           34%        24%        23%        14%      15%     15%       15%      15%        15%        15%
Total Expenses                      62.1       75.8       86.5       93.1    141.8   168.0     291.6     447.9     628.3      816.8
 % revenues                          316%       240%       206%       127%      94%     62%       65%       64%       61%        60%
EBIT                               (42.4)     (44.3)     (44.6)     (19.8)     8.6   102.4     157.9     252.0     401.8      536.1
 % revenues                        -216%      -140%      -106%       -27%        6%     38%       35%       36%       39%        40%
 Other income                       --         --         --         --       --      --        --        --        --       --
 Depreciation and amortization      10.0       12.3       14.1       12.2     14.3    15.7      17.9      21.4      25.0       27.6
 % capital expenditures              0.4%       0.1%       0.1%       0.1%     0.1%    0.1%      0.1%      0.1%      0.1%       0.1%
 EBITDA                            (32.4)     (32.0)     (30.5)      (7.6)    22.9   118.1     175.8     273.4     426.8      563.7
 % revenues                        -165%      -101%       -73%       -10%      15%      44%       39%       39%       41%      42%
 Taxes                             102.4      164.7      219.8       --       --     --        --        102.4     164.7      219.8
 % EBIT                                0%         0%         0%         0%       0%      0%        0%       41%       41%      41%
 Net income                        (42.4)     (44.3)     (44.6)     (19.8)     8.6   102.4     157.9     149.6     237.1      316.3
   revenues                        -216%      -140%      -106%       -27%        6%     38%       35%       21%       23%        23%
 Shares outstanding                 14.5       15.9       17.7       17.7     17.7    17.7      17.7      17.7      17.7       17.7
EPS                               ($2.93)    ($2.78)   ($2.52)    ($1.11)     0.48    5.78     $8.91     $8.44    $13.37      $17.84
 % growth                             NM         NM        NM         NM        NM    1097%       54%       -5%       58%        33%
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Consolidated Balance Sheet                  1995     1996    1997     1998     1999     2000     2001     2002     
                                            ----     ----    ----     ----     ----     ----     ----     ----     
<S>                                        <C>       <C>      <C>      <C>      <C>      <C>     <C>      <C>      
ASSETS
Cash and cash equivalents                   $67.5    $31.0     $6.8     $6.8   ($12.3)   $10.1   $148.2   $319.2   
Accounts receivable                           0.3      0.2      0.2      0.6      3.4      9.7     19.4     34.5   
Other current assets                          1.3      0.7      0.7      0.7      0.7      0.7      0.7      0.7   
Total Current Assets                         69.1     31.9      7.7      8.1     (8.2)    20.5    168.3    354.4   
Equipment/building improvements              60.8     63.6     77.7     92.7    109.1    131.4    147.2    170.4   
Equipment under capital lease                10.8     10.8     10.8     10.8      --       --       --       --
                                             71.5     74.3     88.5    103.4    109.1    131.4    147.2    170.4   

Accumulated depreciation                    (21.0)   (31.0)   (43.3)   (57.3)   (69.6)   (83.3)   (98.4)  (115.8)  
 Net property and equipment                  50.6     43.3     45.2     46.1     39.6     48.1     48.8     54.5   

Other assets                                  0.5      0.6      0.6      0.6      0.6      0.6      0.6      0.6   

Total Assets                               $120.2    $75.8    $53.5    $54.8    $32.0    $69.2   $217.6   $409.5   

LIABILITIES AND EQUITY
Accounts payable and accrueds                 6.7      6.6      7.6      8.7      9.6     11.4     12.1     19.7   
Current portion of deferred rent              0.1      --       --       --       --       0.8      0.8      0.8   
Short-term capital leases                     1.8      2.0      2.1      1.4      --       --       --       --    
Deferred revenue                              3.1      3.0      2.2      2.5      2.6      2.2      1.6      1.5   
Total Current Liabilities                    11.7     11.5     11.9     12.6     13.0     14.4     14.6     22.0   

Long-term capital leases                      5.5      3.5      1.4      --       --       --       --       --
Accrued rent, less current portion            4.5      4.7      4.8      5.0      4.1      3.3      2.5      1.7   

Common stock                                246.7    246.7    270.2    317.2    317.2    317.2    317.2    317.2   
Retained earnings (deficit) - Beginning    (100.1)  (148.2)  (190.7)  (234.9)  (280.0)  (302.4)  (265.7)  (116.6)  
Net income (loss)                           (48.1)   (42.4)   (44.3)   (45.1)   (22.4)    36.6    149.1    185.2   
Retained earnings (deficit) - ending       (148.2)  (190.7)  (234.9)  (280.0)  (302.4)  (265.7)  (116.6)    68.7   
Total Equity                                 98.5     56.0     35.3     37.2     14.8     51.5    200.6    385.8   

Total Liabilities and Equity               $120.2    $75.8    $53.5    $54.8    $32.0    $69.2   $217.6   $409.5   
</TABLE>

Consolidated Balance Sheet                 2003       2004        2005   
                                           ----       ----       ----    
ASSETS                                                                   
Cash and cash equivalents                  $540.0     $886.3   $1,354.9  
Accounts receivable                          55.3       82.0      108.2  
Other current assets                          0.7        0.7        0.7  
Total Current Assets                        596.0      969.0    1,463.9  
Equipment/building improvements             197.2      220.9      241.2  
Equipment under capital lease                                            
                                            197.2      220.9      241.2  
                                                                         
Accumulated depreciation                   (136.2)    (159.5)    (185.9) 
 Net property and equipment                  61.1       61.4       55.2  
                                                                         
Other assets                                  0.6        0.6        0.6  
                                                                         
Total Assets                               $657.6   $1,030.9   $1,519.7  
                                                                         
LIABILITIES AND EQUITY                                                   
Accounts payable and accrueds                29.2       41.7       54.5  
Current portion of deferred rent              0.8        0.8        0.8  
Short-term capital leases                     --         --         --   
Deferred revenue                              0.1        --         --   
Total Current Liabilities                    30.1       42.5       54.5  
                                                                         
Long-term capital leases                                                 
Accrued rent, less current portion            0.8        --         --   
                                                                         
Common stock                                317.2      317.2      317.2  
Retained earnings (deficit) - Beginning      68.7      309.5      671.2  
Net income (loss)                           240.8      361.7      476.8  
Retained earnings (deficit) - ending        309.5      671.2    1,148.0  
Total Equity                                626.7      988.4    1,465.2  
                                                                         
Total Liabilities and Equity               $657.6   $1,030.9   $1,519.7  


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Market Analysis                1995   1996   1997    1998    1999    2000    2001    2002    2003    2004    2005
                               -----  -----  -----   -----   -----   -----   -----   -----   -----   -----   -----
<S>                            <C>    <C>    <C>    <C>     <C>     <C>     <C>     <C>     <C>    <C>     <C>   
Schedule of Eligible Patients
US Market
  Cancer:
  HSC-IP CLL                             10     31     54      77     114     234     361     496     638     789
  HSC-IP NUL                          1,423  1,661  2,013   3,628   4,805   6.048   7,362   8,166   8,412   8,664
  HSC-IP MM                             322    474    734   1,007   1,297   1,602   1,926   1,983   2,043   2,104
  HSC-IP Breast Cancer                3,714  5,738  9,457  12,175  17,557  21,097  28,382  32,888  42,343  43,614

  HSC-IP AIS                           --     --     --      --       878   4,521   6,520   9,593  11,857  12,213
  HSC-IU-GD                            --     --     --      --       180     371     573     787     810     835
  HSC-GT                               --     --     --      --     1,826   4,702   9,686  14,965  20,552  31,753
  HSC-TI                               --     --     --      --      --      --      --     5,719   7,863  11,532
  HSC-IP Leukemia                       914    942  1,212   1,414   1,714   2,649   4,547   5,854  10,130  13,042


Europe:
  Cancer:
  HSC-IP CLL                             12     38     64      93     136     281     434     595     766     947
  HSC-IP NUL                          1,138  1,758  2,415   4,354   5,125   5,938   7,476   9,100  10,094  10,397
  HSC-IP MM                             277    570    880   1,209   1,556   1,923   2,311   2,380   2,452   2,526
  HSC-IP Breast Cancer                3,788  5,853  9,646  12,418  17,908  21,519  28,950  33,546  43,190  44,486

  HSC-IP AIS                           --     --     --      --     1,053   5,425   7,823  11,512  14,228  14,655
  HSC-IU-GD                            --     --     --      --       184     378     585     803     827     852
  HSC-GT                               --     --     --      --      --     2,257   4,649  10,775  16,031  21,592
  HSC-TI                               --     --     --      --      --      --      --     2,430   3,342   4,901
  HSC-IP Leukemia                       932    960  1,236   1,443   1,749   2,702   4,638   5,971  10,333  13,303


Japan:
  Cancer:
  HSC-I P CLL                             5     15     26      38      57     117     181     248     319     394
  HSC-IP NUL                            332    733  1,006   1,814   2,135   2,474   3,115   3,792   4,206   4,332
  HSC-IP MM                              23     59    122     252     389     534     688     850   1,022   1,052
  HSC-IP Breast Cancer                  186    574  1,182   1,705   2,634   3,918   6,031   7,674  11,009  13,084

  HSC-IP AIS                           --     --     --      --      --      --       466   2,398   3,458   5,089
  HSC-IU-GD                            --     --     --      --      --      --        86     167     263     355
  HSC-GT                               --     --     --      --      --      --       872   1,796   4,624   6,880
  HSC-TI                               --     --     --      --      --      --      --      --        35      42
  HSC-IP Leukemia                       389    400    515     602     729   1,126   1,933   2,488   4,306   5,543
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Market Share per Sprint's Business Plan

                          1995  1996    1997    1998    1999   2000    2001    2002     2003     2004     2005
                          ----  ----    ----    ----    ----   ----    ----    ----     ----     ----     ----
U.S. Market
  Cancer:
<S>                       <C>   <C>     <C>     <C>     <C>    <C>     <C>     <C>      <C>      <C>      <C>  
  HSC-IP CLL              0.0%  0.0%    0.0%    0.0%    0.0%   50.0%   60.0%   65.0%    70.0%    70.0%    70.0%
  HSC-IP NHL              0.0%  0.0%    0.0%    0.0%   30.0%   40.0%   50.0%   60.0%    70.0%    70.0%    70.0%
  HSC-IP MM               0.0%  0.0%    0.0%    0.0%   30.0%   40.0%   50.0%   60.0%    70.0%    70.0%    70.0%
  HSC-IP Breast Cancer    0.0%  0.0%    0.0%    0.0%    5.0%   10.0%   20.0%   30.0%    30.0%    30.0%    30.0%
  HSC-IP AIS              0.0%  0.0%    0.0%    0.0%    0.0%    0.0%   25.0%   35.0%    45.0%    50.0%    50.0%
  HSC-IU-GD               0.0%  0.0%    0.0%    0.0%    0.0%   40.0%   45.0%   50.0%    55.0%    60.0%    60.0%
  HSC-GT                  0.0%  0.0%    0.0%    0.0%    0.0%    0.0%   10.0%   20.0%    30.0%    40.0%    50.0%
  HSC-TI                  0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%     0.0%    20.0%    30.0%
  HSC-IP Leukemia         0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    20.0%    30.0%    40.0%


Europe:
  Cancer:
  HSC-IP CLL              0.0%  0.0%    0.0%   50.0%   60.0%   60.0%   65.0%   65.0%    70.0%    70.0%    70.0%
  HSC-IP NHL              0.0%  0.0%    0.0%   30.0%   40.0%   50.0%   60.0%   70.0%    70.0%    70.0%    70.0%
  HSC4P MM                0.0%  0.0%    0.0%   30.0%   40.0%   50.0%   60.0%   70.0%    70.0%    70.0%    70.0%
  HSC-IP Breast Cancer    0.0%  0.0%    0.0%    5.0%   10.0%   20.0%   30.0%   30.0%    30.0%    30.0%    30.0%
  HSC-IP AIS              0.0%  0.0%    0.0%    0.0%    0.0%    0.0%   25.0%   35.0%    45.0%    50.0%    50.0%
  HSC-IU-GD               0.0%  0.0%    0.0%    0.0%    0.0%   40.0%   45.0%   50.0%    55.0%    60.0%    60.0%
  HSC-GT                  0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%   10.0%    30.0%    40.0%    50.0%
  HSC-TI                  0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%     0.0%    20.0%    30.0%
  HSC-IP Leukemia         0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%     0.0%    20.0%    30.0%


Japan:
  Cancer:
  HSC-IP CLL              0.0%  0.0%    0.0%    0.0%    0.0%   50.0%   60.0%   65.0%    70.0%    70.0%    70.0%
  HSC-IP NHL              0.0%  0.0%    0.0%    0.0%    0.0%   30.0%   40.0%   50.0%    60.0%    70.0%    70.0%
  HSC-IP MM               0.0%  0.0%    0.0%    0.0%    0.0%   30.0%   40.0%   50.0%    60.0%    70.0%    70.0%
  HSC-IP Breast Cancer    0.0%  0.0%    0.0%    0.0%    0.0%    5.0%   10.0%   20.0%    30.0%    30.0%    30.0%
  HSC-IP AIS              0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%   35.0%    40.0%    50.0%    50.0%
  HSC-IU-GD               0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%   40.0%    45.0%    50.0%    55.0%
  IISC-GT                 0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    10.0%    30.0%    50.0%
  HSC-TI                  0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%     0.0%     0.0%    20.0%
  HSC-IP Leukemia         0.0%  0.0%    0.0%    0.0%    0.0%    0.0%    0.0%    0.0%     0.0%     0.0%    20.0%
                          0.0%  0.0%    0.0%  115.0%  215.0%  515.0%  695.0%  910.0%  1075.0%  1240.0%  1365.0%
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
                                                               115.0%  215.0%   515.0%   695.0%   910.0%   1075.0%  1240.0%  1365.0%
Market Share Adjusted for     Product Delay
Product Delays                  (in Years)    1996    1997     1998    1999     2000     2001     2002     2003     2004     2005
                              -------------   ----    ----     ----    ----     ----     ----     ----     ----     ----     ----
<S>                                 <C>       <C>     <C>      <C>      <C>     <C>      <C>      <C>      <C>      <C>      <C>  
U.S. Market
Cancer:
  HSC-IP CLL                        0         0.0%    0.0%     0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
  HSC-IP NUL                        0         0.0%    0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
  HSC-IP MM                         0         0.0%    0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%
  HSC-IP Breast Cancer              0         0.0%    0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%
                                              
  HSC-IP AIS                        0         0.0%    0.0%     0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
  HSC-IU-GD                         0         0.0%    0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
  HSC-GT                            0         0.0%    0.0%     0.0%     0.0%     0.0%    10.0%    20.0%    30.0%    40.0%    50.0%
  HSC-TI                            0         0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
  HSC-IP Leukemia                   0         0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%    40.0%


Europe:
  Cancer:
  HSC-IP CLL                                  0.0%    0.0%    50.0%    60.0%    60.0%    65.0%    65.0%    70.0%    70.0%    70.0%
  HSC-IP NUL                                  0.0%    0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
  HSC-IP MM                                   0.0%    0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%    70.0%    70.0%
  HSC-IP Breast Cancer                        0.0%    0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%    30.0%    30.0%
                                              
  HSC-IP AIS                                  0.0%    0.0%     0.0%     0.0%     0.0%    25.0%    35.0%    45.0%    50.0%    50.0%
  HSC-IU-GD                                   0.0%    0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%    60.0%    60.0%
  HSC-GT                                      0.0%    0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    40.0%    50.0%
  HSC-TI                                      0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
  HSC-IP Leukemia                             0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%    30.0%
                                              
                                              
Japan:                                        
  Cancer:                                     
  HSC-IP CLL                                  0.0%    0.0%     0.0%     0.0%    50.0%    60.0%    65.0%    70.0%    70.0%    70.0%
  HSC-IP NUL                                  0.0%    0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
  HSC-IP MM                                   0.0%    0.0%     0.0%     0.0%    30.0%    40.0%    50.0%    60.0%    70.0%    70.0%
  HSC-IP Breast Cancer                        0.0%    0.0%     0.0%     0.0%     5.0%    10.0%    20.0%    30.0%    30.0%    30.0%
                                              
  HSC-IP AIS                                  0.0%    0.0%     0.0%     0.0%     0.0%     0.0%    35.0%    40.0%    50.0%    50.0%
  HSC-IU-GD                                   0.0%    0.0%     0.0%     0.0%     0.0%     0.0%    40.0%    45.0%    50.0%    55.0%
  HSC -GT                                     0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    10.0%    30.0%    50.0%
  HSC-TI                                      0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
  HSC-IP Leukemia                             0.0%    0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%     0.0%    20.0%
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of Revenues
U.S. Market               1996  1997     1998      1999        2000        2001        2002        2003          2004          2005
                          ----  ----     ----      ----        ----        ----        ----        ----          ----          ----
  Cancer:
<S>                        <C>   <C>       <C>   <C>        <C>         <C>         <C>         <C>         <C>           <C>   
  IISC-IP CLL              $0    $0        $0         $0        $149      $1,472      $2,462      $3,646        $4,692        $5,798
  HSC-IP NHL               --    --      --        2,857      20,180      31,752      46,383      60,023        61,828        63,680
  HSC-IP MM                --    --      --          793       5,447       8,413      12,131      14,577        15,018        15,464
  HSC-IP Breast Cancer     --    --      --        1,598      18,435      44,303      89,405     103,597       133,381       137,383

  HSC-IP AIS               --    --      --         --          --         8,901      23,960      45,327        62,249        64,116
  HSC-IU-GD                --    --      --         --         3,024       7,016      12,029      18,184        20,422        21,047
  HSC-GT                   --    --      --         --          --         1,646      27,122      62,854       115,090       222,272
  HSC-TI                   --    --      --         --          --          --          --          --          11,008        48,434
  HSC-IP Leukemia          --    --      --         --          --          --          --        16,392        42,548        73,037
  Total U.S. Market        $0    $0        $0     $5,248     $47,234    $103,502    $213,492    $324,600      $466,236      $651,233


Europe:
  Cancer:
  HSC-IP CLL               $0    $0      $168       $585        $857      $1,916      $2,959      $4,375        $5,633        $6,962
  HSC-IP NHL               --    --     3,804     18,285      26,905      37,412      54,949      66,885        74,188        76,416
  HSC-IP MM                --    --     1,386      5,077       8,169      12,116      16,987      17,493        18,022        18,563
  HSC-IP Breast Cancer     --    --     2,532     13,039      37,607      67,785      91,191     105,669       136,047       140,130

  HSC-IP AIS               --    --      --         --          --        10,681      28,751      54,392        74,699        76,940
  HSC-IU-GD                --    --      --         --           773       7,152      12,281      18,554        20,845        21,470
  HSC-GT                   --    --      --         --          --          --         6,509      45,254        89,772       151,145
  HSC-TI                   --    --      --         --          --          --          --          --           4,679        20,585
  HSC-IP Leukemia          --    --      --         --          --          --          --          --          28,932        55,873
  Total Europe Market      $0    $0    $7,890    $36,986     $74,311    $137,063    $213,627    $312,622      $452,818      $568,085


Japan:
  Cancer:
  HSC-I P CLL              $0    $0        $0         $0         $75        $736      $1,234      $1,823        $2,346        $2,899
  HSC-IP NUL               --    --      --         --         1,681      10,392      16,355      23,890        30,911        31,840
  HSC-IP MM                --    --      --         --           306       2,244       3,612       5,358         7,509         7,732
  HSC-IP Breast Cancer     --    --      --         --           346       4,114      12,666      24,172        34,678        41,215

  HSC-IP AIS               --    --      --         --          --          --         1,283      10,072        18,156        26,715
  HSC-I U-GD               --    --      --         --          --          --           719       3,160         5,527         8,205
  HSC-GT                   --    --      --         --          --          --          --         2,514        19,422        48,157
  HSC-TI                   --    --      --         --          --          --          --          --            --              59
  HSC-IP Leukemia          --    --      --         --          --          --          --          --            --          15,521
  Total Japan Market       $0    $0        $0         $0      $2,408     $17,487     $35,869     $70,988      $118,548      $182,343
Total Product Revenues     $0    $0    $7,890    $42,234    $123,953    $258,052    $462,988    $708,210    $1,037,603    $1,401,661
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of U.S. and Europe Revenues                       1996         1997       1998      1999         2000         2001        
U.S. and Europe                                            ----         ----       ----      ----         ----         ----        
<S>                                                         <C>          <C>        <C>         <C>          <C>         <C>       
  Cancer:
  HSC-IP CLL                                                 $0           $0       $168        $585       $1.006       $3,388      
  HSC-IP NHL                                                 -           -        3,804      21,142       47,085       69,164      
  HSC-IP MM                                                  -           -        1,386       5,870       13,616       20,529      
  HSC-IP Breast Cancer                                       -           -        2,532      14,637       56,041      112,089      
                                                           ----         ----      -----      ------       ------      -------      
  Total Cancer                                               -           -        7,890      42,234      117,748      205,170      

  HSC-IP AIS                                                 -           -          -           -            -         19,582      
  HSC-IU-GD                                                  -           -          -           -          3,797       14,167      
  HSC-GT                                                     -           -          -           -            -          1,646      
  HSC-TI                                                     -           -          -           -            -            -        
  HSC-IP Leukemia                                            -           -          -           -            -            -        
  Total U.S. and Europe                                      $0           $0     $7,890     $42,234      121,545      240,565      

Schedule of HIV Profit Distribution
Eligible Patients
  HSC-GT HIV (Symptom/Asymtom) - US                           -          -          -           -            -          1,019      
  HSC-GT HIV (Symptom/Asymtom) - EU                           -          -          -           -            -            -        
  HSC-GT HIV (Symptom/Asympt)  - JPN                          -          -          -           -            -            -        

Market Share per Sprint's Business Plan
  HSC-GT HIV (Symptom/Asympt) - US                          0.0%         0.0%       0.0%        0.0%         0.0%        50.0%     
  HSC-GT HIV (Symptom/Asympt) - EU                          0.0%         0.0%       0.0%        0.0%         0.0%         0.0%     
  HSC-GT HIV (Symptom/Asympt) - JPN                         0.0%         0.0%       0.0%        0.0%         0.0%         0.0%     

Market Share adjusted for Product Launch Delays
  HSC-GT HIV (Symptom/Asympt) - US                          0.0%         0.0%       0.0%        0.0%         0.0%        50.0%     
  HSC-GT HIV (Symptom/Asympt) - EU                          0.0%         0.0%       0.0%        0.0%         0.0%         0.0%     
  HSC-GT HIV (Symptom/Asympt) - JPN                         0.0%         0.0%       0.0%        0.0%         0.0%         0.0%     

Revenues
  HSC-GT HIV (Symptom/Asympt) - US                           $0           $0         $0          $0           $0       $7,132      
  HSC-GT HIV (Symptom/Asympt) - EU                           -           -          -           -            -            -        
  HSC-GT HIV (Symptom/Asympt) - JPN                          -           -          -           -            -            -        

   Total HIV Revenues                                        -           -          -           -            -          7,132      
   Cost of goods sold                                        -           -          -           -            -          4,867      
                                                           ----         ----      -----      ------       ------      -------      
   SG&A (per Sandoz)                                         -           -          -           -            -          1,528      
   Operating profit                                          -           -          -           -            -            737      

   Special advance repayment                                             -          -           -            -          5,238      
   Number of Centers Rolled Out (Sprint)                     -           -          -           -            -              1      
   Number of Centers built @ l5,000 patients/center          -           -          -           -            -              1      
   Cost                                                      -           -          -           -            -         10,229      
   Profit available for distribution                         -           -          -           -            -            -        
   HSC-GT HIV Profit Distribution                            $0           $0         $0          $0           $0           $0      

<CAPTION>
Schedule of US. and Europe Revenues                        2002         2003         2004           2005   
U.S. and Europe                                            ----         ----         ----           ----   
<S>                                                       <C>          <C>         <C>           <C>
  Cancer:                                                                                                  
  HSC-IP CLL                                               $5,422       $8,020      $10,325        $12,760 
  HSC-IP NHL                                              101,332      126,908      136,016        140,097 
  HSC-IP MM                                                29,119       32,070       33,040         34,028 
  HSC-IP Breast Cancer                                    180,596      209,266      269,428        277,512 
                                                          -------      -------      -------        ------- 
  Total Cancer                                            316,468      376,264      448,809        464,397 
                                                                                                           
  HSC-IP AIS                                               52,711       99,719      136,948        141,056 
  HSC-IU-GD                                                24,310       36,738       41,268         42,517 
  HSC-GT                                                   33,631      108,108      204,863        373,418 
  HSC-TI                                                      -            -         15,687         69,020 
  HSC-IP Leukemia                                             -         16,392       71,480        128,911 
  Total U.S. and Europe                                   427,119      637,222      919,054      1,219,318 
                                                                                                           
Schedule of HIV Profit Distribution                                                                       
Eligible Patients                                                                                          
  HSC-GT HIV (Symptom/Asymtom) - US                        11,654       19,036       41,533         50,306 
  HSC-GT HIV (Symptom/Asymtom) - EU                         1,489        4,984       12,592         16,920 
  HSC-GT HIV (Symptom/Asympt)  - JPN                          -            -            -              174 
                                                                                                           
Market Share per Sprint's Business Plan                                                                    
  HSC-GT HIV (Symptom/Asympt) - US                           50.0%        50.0%        50.0%          50.0%
  HSC-GT HIV (Symptom/Asympt) - EU                           50.0%        50.0%        50.0%          50.0%
  HSC-GT HIV (Symptom/Asympt) - JPN                           0.0%         0.0%         0.0%          50.0%
                                                                                                           
Market Share adjusted for Product Launch Delays                                                            
  HSC-GT HIV (Symptom/Asympt) - US                           50.0%        50.0%        50.0%          50.0%
  HSC-GT HIV (Symptom/Asympt) - EU                           50.0%        50.0%        50.0%          50.0%
  HSC-GT HIV (Symptom/Asympt) - JPN                           0.0%         0.0%         0.0%          50.0%
                                                                                                           
Revenues                                                                                                   
  HSC-GT HIV (Symptom/Asympt) - US                        $81,581     $133,255     $290,730       $352,139 
  HSC-GT HIV (Symptom/Asympt) - EU                         10,422       34,888       88,141        118,443 
  HSC-GT HIV (Symptom/Asympt) - JPN                            -           -            -            1,215 
                                                                                                           
   Total HIV Revenues                                      92,002      168,143      378,871        471,797 
   Cost of goods sold                                      33,292       58,794      131,851        165,452 
   SG&A (per Sandoz)                                        4,130       19,101       57,386         76,558 
                                                          -------      -------      -------        ------- 
   Operating profit                                        54,581       90,248      189,635        229,787 
                                                                                                           
   Special advance repayment                               53,834          -            -              -   
   Number of Centers Rolled Out (Sprint)                        1            2            1           -    
   Number of Centers built @ l5,000 patients/center           -            -              1              1 
   Cost                                                       -            -         10,229         10,229 
   Profit available for distribution                          747       90,248      179,406        219,558 
   HSC-GT HIV Profit Distribution                            $373      $45,124      $89,703       $109,779 
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of Other Revenues                           1996       1997       1998       1999       2000       2001       2002     
                                                     ----       ----       ----       ----       ----       ----       ----     
<S>                                      <C>       <C>        <C>        <C>        <C>        <C>        <C>        <C>        
Collaborations:
    HIV Gene Therapy                                $5,445     $6,197     $6,259     $6,322     $6,385     $6,449     $6,513    
    REVI23 TRD                                       4,816      8,063      8,l96      8,851      6,735      6,873      6,991     
     REV 123 CRD                                     2,616      3,818      4,089      4,828      5,158      2,675      1,714    
     Gene Discovery                                    500      2,000      2,000      2,000      1,500       --         --      
     Genentech TPO                                      96       --         --         --         --         --         --      
     Japan Cell Center Deal                            375      1,500      1,500      1,125       --         --         --      
     Double Positive Selection Device                 --          750      3,000      3,000      2,250       --         --      
    Total Collaborations                 $2,320    $13,848    $22,328    $25,044    $26,126    $22,028    $15,997    $15,218    


Milestone Payments
    Gene Discovery                                  $2,000       $500     $3,000     $2,000     $3,000     $3,000     $3,000    
    Japan Cell Center Deal                           3,500      5,500      4,000       --        3,500      5,000       --      
    Double Positive Selection Device                  --        3,000      2,000      3,000       --        4,000       --      
    Total Milestone Payments                        $5,500     $9,000     $9,000     $5,000     $6,500    $12,000     $3,000    


Royalties
    Gene Discovery                                                                                                              
    Double Positive Selection Device                                                     25         50        100        200    
    Japan Product Sales
    HSC-IP CLL                                        --         --         --         --            7         74        123    
    HSC-IP NUL                                        --         --         --         --          168      1,039      1,635    
    HSC-IP MM                                         --         --         --         --           31        224        361    
    HSC-IP BC                                         --         --         --         --           35        411      1,267    


    HSC-IP AIS                                        --         --         --         --         --         --          128    
    HSC-IU-GD                                         --         --         --         --         --         --           72    
    HSC-GT                                            --         --         --         --         --         --         --      
    HSC-TI                                            --         --         --         --         --         --         --      
    HSC-IP Leukemia                                   --         --         --         --         --         --         --      
    Total Royalties                                     $0         $0         $0        $25       $291     $1,849     $3,787    
    Grants                                             145       --         --         --         --         --         --      
    Other                                              185        200       --         --         --         --         --      
</TABLE>


Schedule of Other Revenues                2003       2004       2005       
                                          ----       ----       ----       
Collaborations:                                                            
    HIV Gene Therapy                         $0         $0         $0      
    REVI23 TRD                             --          --        --        
     REV 123 CRD                          1,173        --        --        
     Gene Discovery                        --          --        --        
     Genentech TPO                         --          --        --        
     Japan Cell Center Deal                --          --        --        
     Double Positive Selection Device      --          --        --        
    Total Collaborations                 $1,173         $0         $0      


Milestone Payments                                                         
    Gene Discovery                       $8,000     $5,000         $0      
    Japan Cell Center Deal                 --         --         --        
    Double Positive Selection Device       --         --         --        
    Total Milestone Payments             $8,000     $5,000         $0      


Royalties                                                                  
    Gene Discovery                       $1,000     $4,000     $5,000      
    Double Positive Selection Device        325        475        600      
    Japan Product Sales                                                    
    HSC-IP CLL                              182        235        290      
    HSC-IP NUL                            2,389      3,091      3,184      
    HSC-IP MM                               536        751        773      
    HSC-IP BC                             2,417      3,468      4,121      


    HSC-IP AIS                            1,007      1,816      2,672      
    HSC-IU-GD                               316        553        821      
    HSC-GT                                  251      1,942      4,816      
    HSC-TI                                 --         --            6      
    HSC-IP Leukemia                        --         --        1,552      
    Total Royalties                      $8,424    $16,330    $23,834      
    Grants                                 --         --         --        
    Other                                  --         --         --        


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Mfg. Costs as a % of Revenue Per 
Sprint's Business Plan                                       1996        1997            1998            1999            2000       
                                                            ------      ------          -------         -------         -------     
<S>                                                <C>      <C>         <C>             <C>             <C>             <C>         
     HSC-IP CLL                                                                            21.7%           21.7%           21.8%    
     HSC-IP NHL                                                                            21.7%           21.7%           21.8%    
     HSC-IP MM                                                                             21.7%           21.7%           21.8%    
     HSC-IP Breast Cancer                                                                  21.7%           21.7%           21.8%    

     HSC-IP AIS                                                                                                                     
     HSC-IU-GD                                                                                                              5.4%    
     HSC-GT                                                                                                                         
     HSC-TI                                                    
     HSC-IP Leukemia                                           
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)                 


Mfg Costs as a % of Revenue Adjusted
for Product Shift
     HSC-IP CLL                                                                            21.7%           21.7%           21.8%    
     HSC-IP NHL                                                                            21.7%           21.7%           21.8%    
     HSC-IP MM                                                                             21.7%           21.7%           21.8%    
     HSC-IP Breast Cancer                                                                  21.7%           21.7%           21.8%    


     HSC-IP AIS                                                                             0.0%            0.0%            0.0%    
     HSC-IU-GD                                                                              0.0%            0.0%            5.4%    
     HSC-GT                                                                                 0.0%            0.0%            0.0%    
     HSC-TI                                                                                 0.0%            0.0%            0.0%    
     HSC-IP Leukemia                                                                        0.0%            0.0%            0.0%    
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)                                              0.0%            0.0%            0.0%    


Mfg. Costs in $'s Adjusted for Product Shift
     HSC-IP CLL                                                                             $36            $127            $219     
     HSC-IP NHL                                                                             825           4,588          10,265     
     HSC-IP MM                                                                              301           1,274           2,968     
     HSC-IP Breast Cancer                                                                   549           3,176          12,217     

     HSC-IP AIS                                                                            --              --              --       
     HSC-IU-GD                                                                             --              --               205     
     HSC-GT                                                                                --              --              --       
     HSC-TI                                                                                --              --              --       
     HSC-IP Leukemia                                                                       --              --              --       

     Manufactuning Costs                                                                  1,712           9,165          25,874     

     MAbs manufacturing costs                                10,704      14,200          14,177          13,318          12,428     
     Page Mill Cell Center                                    2,010       3,030           3,030           2,830           2,210     
     Lyon Cell Center                                         2,689       3,019           3,099           3,099           3,049     
     Total Manufacturing Costs                       $0     $15,403     $20,249         $22,018         $28,412         $43,561     

<CAPTION>
Mfg. Costs as a % of Revenue Per
Sprint's Business Plan                                2001            2002           2003           2004         2005    
                                                     -------         --------       --------       --------     -------- 
<S>                                                  <C>             <C>            <C>            <C>          <C>      
     HSC-IP CLL                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP NUL                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP MM                                          21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP Breast Cancer                               21.8%            21.8%          21.8%            21.8%      21.8%
                                                                                                                         
     HSC-IP AIS                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-I U-GD                                          5.4%             5.4%           5.5%             5.4%       5.5%
     HSC-GT                                             24.1%            24.1%          24.1%            24.1%      24.1%
     HSC-TI                                                                                              16.3%      16.4%
     HSC-IP Leukemia                                                                    16.6%            16.6%      16.6%
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)          24.3%            24.3%          24.3%            24.3%      24.3%
                                                                                                                         
                                                                                                                         
Mfg Costs as a % of Revenue Adjusted                                                                                     
for Product Shift                                                                                                        
     HSC-IP CLL                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP NHL                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP MM                                          21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IP Breast Cancer                               21.8%            21.8%          21.8%            21.8%      21.8%
                                                                                                                         
                                                                                                                         
     HSC-IP AIS                                         21.8%            21.8%          21.8%            21.8%      21.8%
     HSC-IU-GD                                           5.4%             5.4%           5.5%             5.4%       5.5%
     HSC-GT                                             24.1%            24.1%          24.1%            24.1%      24.1%
     HSC-TI                                              0.0%             0.0%           0.0%            16.3%      16.4%
     HSC-IP Leukemia                                     0.0%             0.0%          16.6%            16.6%      16.6%
     HSC-GT HIV- Profit Dist. (Symptom/Asympt)          24.3%            24.3%          24.3%            24.3%      24.3%
                                                                                                                         
                                                                                                                         
Mfg. Costs in $'s Adjusted for Product Shift                                                                             
     HSC-IP CLL                                         $739           $1,182         $1,748         $2,251       $2,782 
     HSC-IP NHL                                       15,078           22,090         27,666         29,652       30,541 
     HSC-IP MM                                         4,475            6,348          6,991          7,203        7,418 
     HSC-IP Breast Cancer                             24,435           39,370         45,620         58,735       60,498 
                                                                                                                         
     HSC-IP AIS                                        4,269           11,491         21,739         29,855       30,750 
     HSC-IU-GD                                           765            1,325          2,003          2,249        2,317 
     HSC-GT                                              396            8,090         26,005         49,280       89,826 
     HSC-TI                                             --               --             --            2,557       11,285 
     HSC-IP Leukemia                                    --               --            2,721         11,866       21,399 
                                                                                                                         
     Manufacturing Costs                              50,157           89,896        134,493        193,646      256,816 
                                                                                                                         
     MAbs manufacturing costs                         12,208           12,208         12,208         12,208       12,208 
     Page Mill Cell Center                             2,050            2.091          2,133          2,175        2,219 
     Lyon Cell Center                                  2,789            2,845          2,902          2,960        3,019 
     Total Manufacturing Costs                       $67,204         $107,040       $151,736       $210,989     $274,262 
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
                                                 1995          1996          1997          1998          1999          2000     
                                               -------       -------       -------       -------       -------       -------    
<S>                                            <C>           <C>           <C>           <C>           <C>           <C>        
Schedule of Research & Development
    Internal research programs                                $8,604        $8,690        $8,777        $9,040        $9,312
    Internal development programs                             12,761        14,113        14,745        15,187        15,643
    Internal clinical program                                  4,070         5,586        11,836        12,191        12,557
    HIV Gene Rx Research program                               6,136         6,197         6,259         6,447         6,640
    REV 123 development program                                4,807         8,063         8,196         8,442         8,695
    REV 123 clinical program                                   2,616         3,818         4,089         4,212         4,338
    Technology acquisitions                                      990         1,500         1,500         1,545         1,591
    Total Research & Development               $46,733       $39,984       $47,967       $55,402       $57,064       $58,776    


Schedule of SG&A
    G&A                                                       $5,010        $5,160        $5,315        $5,475        $5,639
    US business development                                    1,341         1,908         1,965         2,024         2,085
    EU business development                                      384           509           524           540           556
    US marketing / sales                                        --            --           1,211         1,505         2,015
    EU marketing / sales                                        --            --             550           748         1,089
    Total SG&A                                  $8,110        $6,735        $7,577        $9,566       $10,292       $11,384    

    Total Operating Expenses                    54,843        62,122        75,793        86,986        95,768       113,721    

    EBIT                                      ($51,227)     ($42,444)     ($44,265)     ($45,052)     ($22,382)      $36,643    



Schedule of Net Operating Losses and Taxes
Net Operating Loss
    NOL, beginning of year                                 ($120,000)    ($162,444)    ($206,709)    ($251,761)    ($274,144)   
    NOL,  utilization                                        (42,444)      (44,265)      (45,052)      (22,382)       36,643    
    NOL, end of year                                        (162,444)     (206,709)     (251,761)     (274,144)     (237,501)   

     Income taxes                                   $0            $0            $0            $0            $0            $0    

<CAPTION>
                                                   2001          2002        2003        2004        2005    
Schedule of Research & Development               -------       -------     --------    --------    --------  
<S>                                             <C>           <C>          <C>         <C>         <C>       
    Internal research programs                                                                               
    Internal development programs                                                                            
    Internal clinical program                                                                                
    HIV Gene Rx Research program                                                                             
    REV 123 development program                                                                              
    REV 123 clinical program                                                                                 
     Technology acquisitions                                                                                 
    Total Research & Development                 $40,562       $67,425     $104,991    $154,513    $202,940  
                                                                                                             
                                                                                                             
Schedule of SG&A                                                                                             
    G&A                                                                                                      
    US business development                                                                                  
    EU business development                                                                                  
    US marketing/ sales                                                                                      
    EU marketing I sales                                                                                     
    Total SG&A                                   $13,521       $22,475      $34,997     $51,504     $67,647  
    Total Operating Expenses                     121,286       196,939      291,725     417,007     544,848  
    EBIT                                        $149,125      $252,558     $408,218    $613,080    $808,084  
                                                                                                             
                                                                                                             
                                                                                                             
Schedule of Net Operating Losses and Taxes                                                                   
Net Operating Loss                                                                                           
    NOL, beginning of year                     ($237,501)     ($88,376)          $0          $0          $0  
    NOL, utilization                             149,125        88,376         --          --          --    
    NOL, end of year                             (88,376)         --           --          --          --    
     Income taxes                                     $0       $67,315     $167,369    $251,363    $331,314  
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of Capital Expenditures        Cost       1996        1997       1998        1999       2000        2001        2002     
                                        ----       ----        ----       ----        ----       ----        ----        ----     
<S>                                    <C>       <C>        <C>         <C>        <C>         <C>         <C>         <C>        
Number of Facilities
  Convertible HSCS - equipment          5,191        0           1          1           0          0           0           0      
  Convertible HSCS - Improvements       4,200        0           1          1           0          0           0           0      
  Equipment on lease                   10,772        0           0          0           1          0           0           0      
  DPSD - equipment                      3,992        0           0          0           0          2           1           2      
  DPSD - Improvements                   4,200        0           0          0           0          2           1           2      
  Conversion - equipment                1,536        0           0          0           0          0           2           0      
  Conversion - improvements               250        0           0          0           0          0           2           0      
  HIV - equipment                       4,529        0           0          0           0          0           0           0      
  HIV - improvements                    5,700        0           0          0           0          0           0           0      
                                                               
Capital expenditures
  Beginning equipment/building imp.              $60,776    $63,551     $77,739     $92,670    $109,148    $131,410    $147,230   
  R&D related equipment                            2,775      4,797       5,540       5,706       5,878       4,056       6,742   
  Convertible HSCS - equipment                      --        5,191       5,191        --          --          --          --     
  Convertible HSCS - Improvements                   --        4,200       4,200        --          --          --          --     
  Equipment on lease                                --         --          --        10,772        --          --          --     
  DPSD - equipment                                  --         --          --          --         7,984       3,992       7,984   
  DPSD - Improvements                               --         --          --          --         8,400       4,200       8,400   
  Conversion - equipment                            --         --          --          --          --         3,072        --     
  Conversion - improvements                         --         --          --          --          --           500        --     
  HIV - equipment                                   --         --          --          --          --          --          --     
  HIV - improvements                                --         --          --          --          --          --          --     
  Total capital expenditures            4,259      2,775     14,188      14,931      16,478      22,262      15,820      23,126   
  Ending Equipment/Building Imp.                 $63,551    $77,739     $92,670    $109,148    $131,410    $147,230    $170,357   


Depreciation and amortization
  Equipment
  R&D related equipment                           $2,775     $4,797      $5,540      $5,706      $5,878      $4,056      $6,742   
  Convertible UCSC - equipment                      --        5,191       5,191        --          --          --          --
  DPSD - equipment                                  --         --          --          --         7,984       3,992       7,984   
  Conversion - equipment                            --         --          --          --          --         3,072        --     
  HIV - equipment                                   --         --          --          --          --          --          --     
  Total                                           $2,775     $9,988     $10,731      $5,706     $13,862     $11,120     $14,726   

Improvements
  Convertible HSCS - Improvements                     $0     $4,200      $4,200          $0          $0          $0          $0   
  DPSD - Improvements                               --         --          --          --         8,400       4,200       8,400   
  Conversion - improvements                         --         --          --          --          --           500
  HIV - improvements                                --         --          --          --          --          --          --     
  Total Improvements                                  $0     $4,200      $4,200          $0      $8,400      $4,700      $8,400   
</TABLE>


Schedule of Capital Expenditures           2003        2004        2005    
                                           ----        ----        ----    
Number of Facilities                                                        
  Convertible HSCS - equipment               0           0           0     
  Convertible HSCS - Improvements            0           0           0     
  Equipment on lease                         0           0           0     
  DPSD - equipment                           2           1           0     
  DPSD - Improvements                        2           1           0     
  Conversion - equipment                     0           0           0     
  Conversion - improvements                  0           0           0     
  HIV - equipment                            0           0           0     
  HIV - improvements                         0           0           0     
                                                                        
Capital expenditures                                                       
  Beginning equipment/building imp.      $170,357    $197,240    $220,883  
  R&D related equipment                    10,499      15,451      20,294  
  Convertible HSCS - equipment               --          --          --    
  Convertible HSCS - Improvements            --          --          --    
  Equipment on lease                         --          --          --    
  DPSD - equipment                          7,984       3,992        --    
  DPSD - Improvements                       8,400       4,200        --    
  Conversion - equipment                     --          --          --    
  Conversion - improvements                  --          --          --    
  HIV - equipment                            --          --          --    
  HIV - improvements                         --          --          --    
  Total capital expenditures               26,883      23,643      20,294  
  Ending Equipment/Building Imp.         $197,240    $220,883    $241,177  
                                                                           
                                                                           
Depreciation and amortization                                              
  Equipment                                                                
  R&D related equipment                   $10,499     $15,451     $20,294  
  Convertible UCSC - equipment               --          --          --    
  DPSD - equipment                          7,984       3,992        --    
  Conversion - equipment                     --          --          --    
  HIV - equipment                            --          --          --    
  Total                                   $18,483     $19,443     $20,294  
                                                                           
Improvements                                                               
  Convertible HSCS - Improvements              $0          $0          $0  
  DPSD - Improvements                       8,400       4,200              
  Conversion - improvements                                                
  HIV - improvements                         --          --          --    
  Total Improvements                       $8,400      $4,200          $0  


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of Capital Expenditures and Depreciation       1996       1997       1998       1999        2000       2001       2002   
                                                        ----       ----       ----       ----        ----       ----       ----   
<S>                                                      <C>      <C>        <C>        <C>        <C>       <C>        <C>       
Depreciation
   Equipment - 1996                                      $555       $555       $555       $555       $555
   Equipment - 1997                                                1,998      1,998      1,998      1,998      1,998
   Equipment - 1998                                                           2,146      2,146      2,146      2,146      2,146
   Equipment - 1999                                                                      1,141      1,141      1,141      1,141   
   Equipment - 2000                                                                                 2,772      2,772      2,772   
   Equipment - 2001                                                                                            2,224      2,224   
   Equipment - 2002                                                                                            2,945      2,945   
   Equipment - 2003                                                                                                       3,697   
   Equipment - 2004                                                                                                               
   Equipment - 2005                                                                                                               
   Total Depreciation - Equipment                        $555     $2,553     $4,699     $5,840     $8,612    $10,281    $11,229   


   Improvements - existing assets                      $9,454      9,585      9,085      6,085      4,586      4,140      5,138   
   Improvements - 1996                                                                                                            
   Improvements - 1997                                               140        140        140        140        140        140   
   Improvements - 1998                                                          140        140        140        140        140   
   Improvements - 1999                                                                    --         --         --         --     
   Improvements - 2000                                                                                280        280        280   
   Improvements - 2001                                                                                           157        157   
   Improvements - 2002                                                                                                      280   
   Improvements - 2003                                                                                                            
   Improvements - 2004                                                                                                            
   Improvements - 2005                                                                                                            
   Total Depreciation - Improvements                   $9,454     $9,725     $9,365     $6,365     $5,146     $4,857     $6,134   

   Total Depreciation                       $9,472    $10,009    $12,278    $14,064    $12,205    $13,758    $15,139    $17,364   
</TABLE>


Schedule of Capital Expenditures and Depreciation    2003       2004      2005
                                                     ----       ----      ----
Depreciation                                                                   
   Equipment - 1996                                                            
   Equipment - 1997                                                            
   Equipment - 1998                                                            
   Equipment - 1999                                 1,141                      
   Equipment - 2000                                 2,772      2,772
   Equipment - 2001                                 2,224      2,224      2,224
   Equipment - 2002                                 2,945      2,945      2,945
   Equipment - 2003                                 3,697      3,697      3,697
   Equipment - 2004                                            3,889      3,889
   Equipment - 2005                                                       4,059
   Total Depreciation - Equipment                 $12,780    $15,527    $16,813
                                                                               
                                                                               
   Improvements - existing assets                   6,284      6,425      8,197
   Improvements - 1996                                          --            0
   Improvements - 1997                                140        140        140
   Improvements - 1998                                140        140        140
   Improvements - 1999                               --         --         --  
   Improvements - 2000                                280        280        280
   Improvements - 2001                                157        157        157
   Improvements - 2002                                280        280        280
   Improvements - 2003                                280        280        280
   Improvements - 2004                                           140        140
   Improvements - 2005                                                     --  
   Total Depreciation - Improvements               $7,561     $7,842     $9,614

   Total Depreciation                             $20,340    $23,369    $26,427


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Depreciation - HIV Centers                   Cost       1996     1997      1998    1999     2000     2001     2002     2003
                                             ----       ----     ----      ----    ----     ----     ----     ----     ----
<S>                                          <C>          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>    
Schedule of Capital Expenditures - HIV
HIV - equipment                              4,529           0         0        0        0       0        1        0         0
HIV - improvements                           5,700           0         0        0        0       0        1        0         0

    HIV - equipment                                         $0        $0       $0       $0  $4,529       $0       $0    $4,529
    HIV - improvements                                     --         --       --       --   5,700       --       --     5,700

Schedule of Depreciation - HIV
Depreciation
    Equipment - 1996                                      $0.0      $0.0     $0.0     $0.0    $0.0
    Equipment - 1997                                                  --       --       --      --       --       
    Equipment - 1998                                                           --       --      --       --       --
    Equipment - 1999                                                                    --      --       --       --        --
    Equipment - 2000                                                                           906      906      906       906
    Equipment - 2001                                                                                     --       --        --
    Equipment - 2002                                                                                              --        --
    Equipment - 2003                                                                                                       906
    Equipment - 2004                                                                                                          
    Equipment - 2005                                                                                                          
    Total Depreciation - HIV Equipment                      $0        $0       $0       $0    $906     $906     $906    $1,812

    Improvements - 1996                                     $0        $0       $0       $0      $0       $0       $0        $0
    Improvements - 1997                                               --       --       --      --       --       --        --
    improvements - 1998                                                                 --      --       --       --        --
    Improvements - 1999                                                                 --      --       --       --        --
    Improvements - 2000                                                                        190      190      190       190
    Improvements - 2001                                                                                  --       --        --
    Improvements - 2002                                                                                           --        --
    Improvements - 2003                                                                                                    190
    Improvements - 2004                                                                                                       
    Improvements - 2005                                                                                                       

    Total Depreciation - HIV Improvements                   $0        $0       $0       $0    $190     $190     $190      $380

      Total Depreciation - HIV                              --        --       --       --   1,096    1,096    1,096     2,192

      Depreciation - Sprint (50O/o)                         $0        $0       $0       $0    $548     $548     $548    $1,096
</TABLE>


Depreciation - HIV Centers                    2004        2005      
                                              ----        ----      
Schedule of Capital Expenditures - HIV                              
HIV - equipment                                   1          1
HIV - improvements                                1          1

    HIV - equipment                          $4,529         $0  
    HIV - improvements                        5,700         --  
                                                                
Schedule of Depreciation - HIV                                  
Depreciation                                                    
    Equipment - 1996                                            
    Equipment - 1997                                            
    Equipment - 1998                                            
    Equipment - 1999                                            
    Equipment - 2000                            906         --  
    Equipment - 2001                             --             
    Equipment - 2002                             --         --  
    Equipment - 2003                            906        906  
    Equipment - 2004                            906        906 
    Equipment - 2005                                        --  
    Total Depreciation - HIV Equipment       $2,717     $1,812  
                                                                
    Improvements - 1996                          $0         $0  
    Improvements - 1997                          --         --
    improvements - 1998                          --         --  
    Improvements - 1999                          --         --  
    Improvements - 2000                         190        190  
    Improvements - 2001                          --         --  
    Improvements - 2002                          --         --  
    Improvements - 2003                         190        190  
    Improvements - 2004                         190        190  
    Improvements - 2005                                     --  
                                                                
    Total Depreciation - HIV Improvements      $570       $570  
                                                                
      Total Depreciation - HIV                3,287      2,382  
                                                                
      Depreciation - Sprint (50O/o)          $1,644     $1,191  


<PAGE>

Valuation Analysis (Sensitivity Case 1)
================================================================================

<TABLE>
<CAPTION>
Schedule of Working Capital                   1995          1996          1997         1998         1999       2000          2001   
                                              ----          ----          ----         ----         ----       ----          ----   
<S>                                         <C>           <C>           <C>          <C>          <C>          <C>            <C>   
   Current assets
   A/R                                         $256          $200          $200         $631       $3,381      $9.747       $19,393 
   Other current assets                       1,336           700           700          700          700         700           700 
                                             ------        ------        ------       ------       ------      ------        ------ 
   Total current assets                       1,592           900           900        1,331        4,081      10,447        20,093 
   Current liabilities
   A/P and accruals                           6,681         6,559         7,579        8,699        9,577      11,372        12,129 
   Current portion of accrued rent               69          --            --           --            827         827           827 
   Noncurrent portion of accrued rent         4,565         4.723         4,841        4.959        4,132       3,305         2,478 
   Deferred revenue                           3,097         2,958         2,233        2,504        2,613       2,203         1,600 
                                             ------        ------        ------       ------       ------      ------        ------ 
   Total current liabilities                 14,412        14,240        14,653       16,162       17,148      17,707        17,033 

   Net working capital                      (12,820)      (13,340)      (13,753)     (14,831)     (13,068)     (7,260)        3,060 
   Net Investment in Working Capital             $0           520           413        1,078       (1,763)     (5,808)      (10,320)


Schedule of Common Stock

   Beginning common stock                  $246,679      $246,679      $246,679     $270,179     $317,179    $317,179      $317,179 
   Shares issued                               --            --           1,471        1,786         --          --            --   
   Price                                       --            --              17           28         --          --            --   
   Discount                                     6.0%          6.0%          6.0%         6.0%         6.0%        6.0%          6.0%
   Net proceeds                                --            --          23,500       47,000         --          --            --   
   Ending common stock                     $246,679      $246,679      $270,179     $317,179     $317,179    $317,179      $317,179 

Schedule of Shares Outstanding

   Beginning shares outstanding                --          14,470        14,470       15,940       17,726      17,726        17,726 
   Shares issued                               --            --           1,471        1,786         --          --            --   
   Ending shares outstanding                 14,028        14,470        15,940       17,726       17,726      17,726        17,726 

<CAPTION>

Schedule of Working Capital                      2002          2003         2004         2005    
                                                 ----          ----         ----         ----    
<S>                                              <C>           <C>          <C>          <C>     
   Current assets                                                                                
   A/R                                          $34,502       $55,262      $82,007     $108,235  
   Other current assets                             700           700          700          700  
                                                 ------        ------       ------       ------  
   Total current assets                          35,202        55,962       82,707      108,935  
   Current liabilities                                                                           
   A/P and accruals                              19,694        29,172       41,701       54,485  
   Current portion of accrued rent                  827           827          824         --    
   Noncurrent portion of accrued rent             1,651           824         --           --    
   Deferred revenue                               1,522           117         --           --    
                                                 ------        ------       ------       ------  
   Total current liabilities                     23,694        30,941       42,525       54,485  
                                                                                                 
   Net working capital                           11,509        25,021       40,182       54,450  
   Net Investment in Working Capital             (8,449)      (13,512)     (15,162)     (14,267) 
                                                                                                 
                                                                                                 
Schedule of Common Stock                                                                         

   Beginning common stock                      $317,179      $317,179     $317,179     $317,179  
   Shares issued                                   --            --           --           --    
   Price                                           --            --           --           --    
   Discount                                         6.0%          6.0%         6.0%         6.0% 
   Net proceeds                                    --            --           --           --    
   Ending common stock                         $317,179      $317,179     $317,179     $317,179  
                                                                                                 
Schedule of Shares Outstanding                                                                   

   Beginning shares outstanding                  17,726        17,726       17,726       17,726  
   Shares issued                                   --            --           --           --    
   Ending shares outstanding                     17,726        17,726       17,726       17,726  
</TABLE>



<PAGE>

Sprint Discounted Cash Flow Analysis
================================================================================
Discounted Cash Flow Analysis
Terminal Year: 2005 (EBIT)
(Sensitivity Case 2)

<TABLE>
<CAPTION>

Discount rate                          35.0%                      40.0%                     45.0%                     50.0%
                             ------------------------  ------------------------- -------------------------   -----------------------
                             -----     -----    -----   ------    -----   -----    -----    -----    -----    -----   -----    -----
EBIT multiple                11.0x     13.0x    15.0x   l11.0x    13.0x   15.0x    11.0x    13.0x    15.0x    11.0x   13.0x    15.0x
                             -----     -----    -----   ------    -----   -----    -----    -----    -----    -----   -----    -----


<S>                           <C>     <C>      <C>      <C>      <C>     <C>      <C>     <C>      <C>      <C>      <C>      <C>   
Cash flows, 1997 to 2005      (13.0)  (13.0)   (13.0)   (24.1)   (24.1)   (24.1)  (31.4)   (31.4)   (31.4)   (36.0)  (36.0)   (36.0)

Terminal value, 2005          307.4   363.3    419.2    221.6    261.9    302.2   161.6    191.0    220.4    119.1   140.8    162.4
                              -----   -----    -----    -----    -----    -----   -----    -----    -----    -----   -----    -----
Enterprise Value              294.5   350.4    406.2    197.5    237.8    278.1   130.2    159.6    189.0     83.1   104.7    126.4

Plus:Option proceeds           28.4    28.4     28.4     28.4     28.4     28.4    28.4     28.4     28.4     28.4    28.4     28.4

Plus: Cash and investments     25.0    25.0     25.0     25.0     25.0     25.0    25.0     25.0     25.0     25.0    25.0     25.0

Plus Residual NOL               -       -        -        -        -        -       -        -        -        -       -        -

Less: Total debt               (6.0)   (6.0)    (6.0)    (6.0)    (6.0)    (6.0)   (6.0)    (6.0)    (6.0)    (6.0)   (6.0)    (6.0)

Equity Value                  341.9   397.7    453.6    244.9    285.2    325.5   177.6    207.0    236.4    130.5   152.1    173.8

Fully-diluted shares           
 outstanding                   16.2    16.2     16.2     16.2     16.2     16.2    16.2     16.2     16.2     16.2    16.2     16.2

Equity Value Per Share       $21.11  $24.56   $28.01   $15.13   $17.61   $20.10  $10.97   $12.78   $14.60    $8.06   $9.39   $10.73
                             ------------------------  ------------------------- -------------------------   -----------------------
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>

                                  1996       1997       1998       1999       2000       2001       2002      2003  
                                  ----       ----       ----       ----       ----       ----       ----      ----  
<S>                             <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>    
REVENUES
Cancer:
HSC-IP CLL                      $   0.0    $   0.0    $   0.0    $   0.2    $   0.7    $   1.8   $   4.6   $   6.5
HSC-IP NHL                          --         --         --         6.0       22.1       49.5      75.0     103.5
HSC-IP MM                           --         --         --         1.7        6.6       14.7      21.6      26.2
HSC-IP Breast Cancer                --         --         --         2.9       18.5       58.9     131.9     183.1
HSC-IP AIS                          --         --         --         --         --         --       28.2      77.6
HSC-IU-GD                           --         --         --         --         --         6.4      17.8      27.1
HSC-GT                              --         --         --         --         --         --        2.8      47.5
HSC-TI                              --         --         --         --         --         --        --        --   
HSC-IP Leukemia                     --         --         --         --         --         --        --        --   
HSC - GT HIV Profit Distributi      --         --         --         --         --         --        --       45.1
Total Product Revenues              --         --         --        10.7       48.0      131.3     282.0     516.7
 % growth                             0%         0%         0%         0%       347%       174%      115%       83%

Collaborative research             13.8       22.3       25.0       26.1       22.0       16.0      15.2       1.2
Milestone payments                  5.5        9.0        9.0        5.0        6.5       12.0       3.0       8.0
Grants                              0.1       --         --         --         --         --        --        --   
Royalties                          --         --         --          0.0        0.1        0.4       2.3       5.8
Other                               0.2        0.2       --         --         --         --        --        --   
Total Revenues                     19.7       31.5       34.0       41.9       76.6      159.7     302.5     531.7
 % growth                             0%        60%         8%        23%        83%       109%       89%       76%
OPERATING EXPENSES
Manufacturing                      15.4       20.2        8.6       21.4       45.4       60.1     119.2     165.0
 % revenues                          78%        64%        25%        51%        59%        38%       39%       31%
Research & development             40.0       48.0       55.4       57.1       58.8       24.0      45.4      79.8
 % revenues                         203%       152%       163%       136%        77%        15%       15%       15%
Selling, general &                  6.7        7.6        9.6       10.3       11.5       24.0      45.4      79.8
  administrative
 % revenues                          34%        24%        28%        25%        15%       15%        15%       15%
Total Expenses                     62.1       75.8       73.6       88.7      115.7      108.0     209.9     324.5
 % revenues                         316%       240%       216%       212%       151%        68%       69%       61%
EBIT                              (42.4)     (44.3)     (39.6)     (46.8)     (39.1)      51.7      92.6     207.2
 % revenues                        -216%      -140%      -116%      -112%       -51%        32%       31%       39%
Other income                       --         --         --         --         --         --        --        --   
 Depreciation and amortization     10.0       12.3       14.1       12.2       13.8       15.4      17.1      20.2
 % capital expenditures             0.4%       0.1%       0.1%       0.1%       0.1%       0.1%      0.1%      0.1%
EBITDA                            (32.4)     (32.0)     (25.5)     (34.6)     (25.4)      67,1     109.7     227.4
 % revenues                        -165%      -101%       -75%       -83%       -33%        42%       36%       43%
 Taxes                             --         --         --         --         --         --        --         7.9
 % EBIT                               0%         0%         0%         0%         0%         0%        0%        4%
 Net income                       (42.4)     (44.3)     (39.6)     (46.8)     (39.1)      51.7      92.6     199.3
 % revenues                        -216%      -140%      -116%      -112%       -51%        32%       31%       37%
 Shares outstanding                14.5       15.9       17.7       17.7       17.7       17.7      17.7      17.7
EPS                             ($ 2.93)   ($ 2.78)   ($ 2.23)   ($ 2.64)   ($ 2.21)   $  2.92   $  5.22   $ 11.24
 % growth                          NM         NM         NM         NM         NM         NM          79%      115%
</TABLE>

                                   2004         2005    
                                   ----         ----    
REVENUES                         
Cancer:                          
HSC-IP CLL                       $   9.0     $   11.2
HSC-IP NUL                         119.0        122.6
HSC-IP MM                           28.9         29.8
HSC-IP Breast Cancer               235.7        242.8
HSC-IP AIS                         123.3        141.1
HSC-IU-GD                           30.7         34.5
HSC-GT                             128.0        248.9
HSC-TI                               --          18.4
HSC-IP Leukemia                     24.8         80.5
HSC - GT HIV Profit Distributi      89.7        109.4
Total Product Revenues             789.3      1,039.2
 % growth                             53%          32%

Collaborative research               --           --   
Milestone payments                   5.0         --   
Grants                               --           --   
Royalties                           13.0         18.6
Other                                --           --   
Total Revenues                     807.3      1,057.8
 % growth                             52%          31%
OPERATING EXPENSES
Manufacturing                      244.3        324.2
 % revenues                           30%          31%
Research & development             121.1        158.7
 % revenues                           15%          15%
Selling, general &                 121.1        158.7
  administrative
 % revenues                           15%          15%
Total Expenses                     486.5        641.6
 % revenues                           60%          61%
EBIT                               320.7        416.2
 % revenues                           40%          39%
Other income                         --           --   
 Depreciation and amortization      23.1         25.2
 % capital expenditures              0.1%         0.2%
EBITDA                             343.8        441.5
 % revenues                           43%          42%
 Taxes                             131.5        170.7
 % EBIT                               41%          41%
 Net income                        189.2        245.6
 % revenues                           23%          23%
 Shares outstanding                 17.7         17.7
EPS                              $ 10.68     $  13.85
 % growth                            -5%           30%


<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
                              1996      1997     1998     1999     2000     2001     2002    2003    2004    2005
                             --------  --------  -------- -------  -------  ------- -------- ------- ------- --------

<S>                            <C>      <C>      <C>      <C>      <C>       <C>     <C>      <C>      <C>      <C>  
EBIT                            (42.4)    (44.3)    (39.6)    (46.8)  (39.1)   51.7      92.6     207.2     320.7     416.2
% of revenues                   -216%     -140%     -116%     -l12%    -51%      32%       31%       39%       40%       39%
% growth                          NM        NM        NM        NM      NM      NM         79%      124%       55%       30%

Taxes                            --        --        --        --      --      --        --         7.9     131.5     170.7
                               ------    ------    ------    ------  ------  ------    ------    ------    ------    ------
% EBIT                              0%        0%        0%        0%      0%      0%        0%        4%       41%       41%

EBIT, after tax                 (42.4)    (44.3)    (39.6)    (46.8)  (39.1)   51.7      92.6     199.3     189.2     245.6

Depreciation                     10.0      12.3      14.1      12.2    13.8    15.4      17.1      20.2      23.1      25.2
% capital expenditures              0%        0%        0%        0%      0%      0%        0%        0%        0%        0%

Other non-cash charges (HIV d    --        --        --        --      --       0.5       0.5       1.1       1.6       1.6
                               ------    ------    ------    ------  ------  ------    ------    ------    ------    ------

Operating cash flow             (32.4)    (32.0)    (25.5)    (34.6)  (25.4)   67.6     110.2     220.6     213.9     272.5
% revenues                      -165%     -101%      -75%      -83%    -33%      42%       36%       41%       27%       26%

Investment in working capital     0.5       0.4       1.5      (0.4)   (3.3)  (10.3)     (7.1)    (12.6)    (12.8)    (11.4)
%Change in revenues                NM         3%       61%      -5%     -9%    -12%       -5%       -6%       -5%       -5%

Capital expenditures             (2.8)    (14.2)    (14.9)    (16.5)  (22.3)  (14.2)    (20.9)    (24.4)    (20.3)    (15.9)
                               ------    ------    ------    ------  ------  ------    ------    ------    ------    ------
% revenues                         14%       45%       44%       39%     29%      9%        7%        5%        3%        2%

Unlevered Free Cash Flows       (34.7)    (45.8)    (38.9)    (51.5)  (50.9)   43.2      82.2     183.6     180.8     245.2
                               ======    ======    ======    ======  ======  ======    ======    ======    ======    ======
 %revenues                       -176%     -145%     -114%     -123%   -66%      27%       27%       35%       22%       23%
 % growth                         NM        NM        NM        NM      NM      NM        NM        NM        NM        NM


Schedule of Net Operating Losses and Taxes
Net Operating Loss
NOL, beginning of year         ($ 120)   ($ 162)   ($ 207)   ($ 246) ($ 293) ($ 332)   ($ 280)   ($ 188)   $    0    $    0
NOL utilization                   (42)      (44)      (40)      (47)    (39)     52        93       188      --         --
NOL, end of year                 (162)     (207)     (246)     (293)   (332)   (280)     (188)     --        --         --
Income taxes                   $    0    $    0    $    0    $    0  $    0  $    0    $    0    $    8    $  132    $  171
</TABLE>

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>

Consolidated Balance Sheet                    1995        1996        1997        1998        1999        2000        2001     
                                              ----        ----        ----        ----        ----        ----        ----     
<S>                                          <C>         <C>          <C>         <C>       <C>         <C>          <C>     
ASSETS
Cash and cash equivalents                    $67.5       $31.0        $6.8        $1.1      ($41.3)     ($74.8)      ($1.3)  
Accounts receivable                            0.3         0.2         0.2                     0.9         3.8        10.5   
Other current assets                           1.3         0.7         0.7         0.7         0.7         0.7         0.7   
Total Current Assets                          69.1        31.9         7.7         1.8       (39.7)      (70.2)        9.9   

Equipment/building improvements               60.8        63.6        77.7        92.7       109.1       13l.4       145.6   
Equipment under capital lease                 10.8        10.8        10.8        10.8        --          --           --   
                                              71.5        74.3        88.5       103.4       109.1       131.4       145.6   
Accumulated depreciation                     (21.0)      (31.0)      (43.3)      (57.3)      (69.6)      (83.3)      (98.1)  
 Net property and equipment                   50.6        43.3        45.2        46.1        39.6        48.1        47.5   

Other assets                                   0.5         0.6         0.6         0.6         0.6         0.6         0.6   

Total Assets                                $120.2       $75.8       $53.5       $48.4        $0.4      ($21.6)      $58.0   


LIABILITIES AND EQUITY
Accounts payable and accrueds                  6.7         6.6         7.6         8.5         8.9         9.8         7.7   
Current portion of deferred rent               0.1         --          --          --          --          --           --   
 Short-term capital leases                     1.8         2.0         2.1         1.4         --          --           --   
Deferred revenue                               3.1         3.0         2.2         2.5         2.6         2.2         1.6   
Total Current Liabilities                     11.7        11.5        11.9        12.4        12.3        12.9        10.1   

Long-term capital leases                       5.5         3.5         1.4         --          --           --         --   
Accrued rent, less current portion             4.5         4.7         4.8         5.0         4.1         3.3         2.5  

Common stock                                 246.7       246.7       270.2       317.2       317.2       317.2       317.2  
Retained earnings (deficit) - Beginning     (100.1)     (148.2)     (190.7)     (234.9)     (286.1)     (333.2)     (354.9) 
Net income (loss)                            (48.1)      (42.4)      (44.3)      (51.2)      (47.0)      (21.7)       83.1  
Retained earnings (deficit) - ending        (148.2)     (190.7)     (234.9)     (286.1)     (333.2)     (354.9)     (271.8) 
Total Equity                                  98.5        56.0        35.3        31.0       (16.0)      (37.7)       45.4  
                                                                             
Total Liabilities and Equity                $120.2       $75.8       $53.5       $48.4        $0.4      ($21.6)      $58.0  
                                                                            
<CAPTION>

Consolidated Balance Sheet                    2002        2003        2004        2005       
                                              ----        ----        ----        ----       
<S>                                         <C>         <C>         <C>         <C>        
ASSETS                                                                                     
Cash and cash equivalents                   $153.4      $349.3      $620.5      $989.3     
Accounts receivable                           22.7        41.8        64.2        84.6     
Other current assets                           0.7         0.7         0.7         0.7     
Total Current Assets                         176.9       391.8       685.3     1,074.6     
                                                                                           
Equipment/building improvements              166.5       190.8       211.1       227.0     
Equipment under capital lease                166.5       190.8       211.1       227.0     
Accumulated depreciation                    (114.7)     (133.8)     (155.2)     (178.8)    
 Net property and equipment                   51.8        57.1        56.0        48.2     
                                                                                           
Other assets                                   0.6         0.6         0.6         0.6     
                                                                                           
Total Assets                                $229.2      $449.5      $741.9    $1,123.4     


LIABILITIES AND EQUITY                                                                     
Accounts payable and accrueds                 13.6        22.3        32.8        42.6    
Current portion of deferred rent               --          --          --          --     
 Short-term capital leases                     --          --          --          --     
Deferred revenue                               1.5         0.1         --          --       
Total Current Liabilities                     16.0        23.2        33.6        42.6    
                                                                                           
Long-term capital leases                       --          --          --           --     
Accrued rent, less current portion             1.7         0.8         --           --     
                                                                                           
Common stock                                 317.2       317.2       317.2       317.2    
Retained earnings (deficit) - Beginning     (271.8)     (105.6)      108.2       391.1    
Net income (loss)                            166.2       213.8       282.8       372.5    
Retained earnings (deficit) - ending        (105.6)      108.2       391.1       763.6    
Total Equity                                 211.6       425.4       708.3     1,080.7    
                                                                                          
Total Liabilities and Equity                $229.2      $449.5      $741.9    $1,123.4    

</TABLE>


<PAGE>


Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
Market Analysis              1995     1996      1997      1998      1999      2000      2001      2002      2003      2004      2005
                             ----     ----      ----      ----      ----      ----      ----      ----      ----      ----      ----
<S>                                    <C>       <C>       <C>      <C>       <C>      <C>        <C>       <C>       <C>       <C>
Schedule of Eligible Patients                                                                                                  
U.S. Market                                                                                                                    
  Cancer:                                                                                                                        
  HSC-IP CLL                             9        27        47        67        99       204       316       434       559       690
  HSC-IP NHL                         1,245     1,453     1,761     3,175     4,204     5,292     6,442     7,146     7,361     7,581
  HSC-IP MM                            282       415       642       881     1,135     1,402     1,685     1,735     1,788     1,841
  HSC-IP Breast Cancer               3,250     5,021     8,275    10,653    15,362    18,460    24,835    28,777    37,050    38,162
                                                                                                                             
  HSC-IP AIS                          --        --        --        --         878     4,521     6,520     9,593    11,857    12,213
  HSC-IU-GD                           --        --        --        --         146       302       465       640       658       679
  HSC-GT                              --        --        --        --       1,522     3,919     8,072    12,471    17,127    26,461
  HSC-TI                              --        --        --        --        --        --        --       4,575     6,290     9,226
  HSC-IP Leukemia                      799       824     1,061     1,238     1,500     2,318     3,979     5,123     8,864    11,412
                                                                                                                             
Europe:                                                                                                                     
  Cancer:                                                                                                                     
  HSC-IP CLL                            11        33        56        81       119       246       379       521       671       829
  HSC-IP NHL                           996     1,539     2,113     3,809     4,484     5,196     6,542     7,963     8,832     9,097
  HSC-IP MM                            242       498       770     1,058     1,362     1,683     2,022     2,083     2,146     2,210
  HSC-IP Breast Cancer               3,315     5,121     8,440    10,866    15,670    18,829    25,331    29,352    37,791    38,925
                                                                                                                             
  HSC-IP AIS                          --        --        --        --       1,053     5,425     7,823    11,512    14,228    14,655
  HSC-IU-GD                           --        --        --        --         150       307       475       653       672       692
  HSC-GT                              --        --        --        --        --       1,881     3,875     8,979    13,359    17,994
  HSC-TI                              --        --        --        --        --        --        --       1,944     2,674     3,921
  HSC-IP Leukemia                      816       840     1,082     1,263     1,530     2,364     4,058     5,225     9,041    11,640
                                                                                                                             
Japan:                                                                                                                      
  Cancer:                                                                                                                     
  HSC-IP CLL                             4        13        23        34        50       102       158       217       279       345
  HSC-IP NHL                           291       641       881     1,587     1,868     2,165     2,726     3,318     3,680     3,791
  HSC-IP MM                             20        52       107       221       340       468       602       744       894       921
  HSC-IP Breast Cancer                 162       502     1,035     1,492     2,304     3,429     5,277     6,714     9,633    11,449
                                                                                                                             
  HSC-IP AIS                          --        --        --        --        --        --         466     2,398     3,458     5,089
  HSC-IU-GD                           --        --        --        --        --        --          70       136       214       289
  HSC-GT                              --        --        --        --        --        --         727     1,497     3,854     5,733
  HSC-TI                              --        --        --        --        --        --        --        --          28        34
  HSC-IP Leukemia                      340       350       451       526       638       985     1,691     2,177     3,767     4,850

</TABLE>
                       

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
Market Share per Sprint's Business Plan

<TABLE>
<CAPTION>

                                              1995       1996        1997        1998        1999        2000        2001  
                                              ----       ----        ----        ----        ----        ----        ----  
<S>                                            <C>        <C>         <C>         <C>         <C>        <C>         <C>    
U.S. Market 
    Cancer:
    HSC-IP CLL                                 0.0%       0.0%        0.0%        0.0%        0.0%       50.0%       60.0%  
    HSC-IP NHL                                 0.0%       0.0%        0.0%        0.0%       30.0%       40.0%       50.0%  
    HSC-IP MM                                  0.0%       0.0%        0.0%        0.0%       30.0%       40.0%       50.0%  
    HSC-IP Breast Cancer                       0.0%       0.0%        0.0%        0.0%        5.0%       10.0%       20.0%  

    HSC-IP AIS                                 0.0%       0.0%        0.0%        0.0%        0.0%        0.0%       25.0%  
    HSC-IU-GD                                  0.0%       0.0%        0.0%        0.0%        0.0%       40.0%       45.0%  
    HSC-GT                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%       10.0%  
    HSC-TI                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%  
    HSC-IP Leukemia                            0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%  
                                                                                

Europe:
    Cancer:
    HSC-IP CLL                                 0.0%       0.0%        0.0%       50.0%       60.0%       60.0%       65.0%   
    HSC-IP NHL                                 0.0%       0.0%        0.0%       30.0%       40.0%       50.0%       60.0%   
    HSC-IP MM                                  0.0%       0.0%        0.0%       30.0%       40.0%       50.0%       60.0%   
    HSC-IP Breast Cancer                       0.0%       0.0%        0.0%        5.0%       10.0%       20.0%       30.0%   

    HSC-IP AIS                                 0.0%       0.0%        0.0%        0.0%        0.0%        0.0%       25.0%   
    HSC-IU-GD                                  0.0%       0.0%        0.0%        0.0%        0.0%       40.0%       45.0%   
    HSC-GT                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-TI                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IP Leukemia                            0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
                                                                                                                
Japan:                                                                                                          
    Cancer:                                                                                                     
    HSC-IP CLL                                 0.0%       0.0%        0.0%        0.0%        0.0%       50.0%       60.0%   
    HSC-IP NHL                                 0.0%       0.0%        0.0%        0.0%        0.0%       30.0%       40.0%   
    HSC-IP MM                                  0.0%       0.0%        0.0%        0.0%        0.0%       30.0%       40.0%   
    HSC-IP Breast Cancer                       0.0%       0.0%        0.0%        0.0%        0.0%        5.0%       10.0%   

    HSC-IP AIS                                 0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IU-GD                                  0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-GT                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-TI                                     0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IP Leukemia                            0.0%       0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
                                               0.0%       0.0%        0.0%      115.0%      215.0%      515.0%      695.0%   
</TABLE>


                                    2002        2003        2004        2005    
                                    ----        ----        ----        ----    
    Cancer:                                                                    
    HSC-IP CLL                      65.0%       70.0%       70.0%       70.0%  
    HSC-IP NHL                      60.0%       70.0%       70.0%       70.0%  
    HSC-IP MM                       60.0%       70.0%       70.0%       70.0%  
    HSC-IP Breast Cancer            30.0%       30.0%       30.0%       30.0%  
    HSC-IP AIS                      35.0%       45.0%       50.0%       50.0%  
    HSC-IU-GD                       50.0%       55.0%       60.0%       60.0%  
    HSC-GT                          20.0%       30.0%       40.0%       50.0%  
    HSC-TI                           0.0%        0.0%       20.0%       30.0%  
    HSC-IP Leukemia                  0.0%       20.0%       30.0%       40.0%  
                                                                               
                                                                               
Europe:                                                                       
    Cancer:                                                                     
    HSC-IP CLL                      65.0%       70.0%       70.0%       70.0%   
    HSC-IP NHL                      70.0%       70.0%       70.0%       70.0%   
    HSC-IP MM                       70.0%       70.0%       70.0%       70.0%   
    HSC-IP Breast Cancer            30.0%       30.0%       30.0%       30.0%   
                                                                                
    HSC-IP AIS                      35.0%       45.0%       50.0%       50.0%   
    HSC-IU-GD                       50.0%       55.0%       60.0%       60.0%   
    HSC-GT                          10.0%       30.0%       40.0%       50.0%   
    HSC-TI                           0.0%        0.0%       20.0%       30.0%   
    HSC-IP Leukemia                  0.0%        0.0%       20.0%       30.0%   
                                                                               
Japan:                                                                         
    Cancer:                                                                    
    HSC-IP CLL                      65.0%       70.0%       70.0%       70.0%   
    HSC-IP NHL                      50.0%       60.0%       70.0%       70.0%   
    HSC-IP MM                       50.0%       60.0%       70.0%       70.0%   
    HSC-IP Breast Cancer            20.0%       30.0%       30.0%       30.0%   
    HSC-IP AIS                      35.0%       40.0%       50.0%       50.0%   
    HSC-IU-GD                       40.0%       45.0%       50.0%       55.0%   
    HSC-GT                           0.0%       10.0%       30.0%       50.0%   
    HSC-TI                           0.0%        0.0%        0.0%       20.0%   
    HSC-IP Leukemia                  0.0%        0.0%        0.0%       20.0%   
                                   910.0%     1075.0%     1240.0%     1365.0%   

<PAGE>


Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>

                                                                                   0.0%      115.0%      215.0%      515.0%   
Market Share Adjusted for               Product Delay
Product Delays                            (in Years)      1996        1997        1998        1999        2000        2001      
                                          ----------      ----        ----        ----        ----        ----        ----      
<S>                                           <C>          <C>         <C>         <C>         <C>         <C>        <C>     
U.S. Market
    Cancer:
    HSC-IP CLL                                2            0.0%        0.0%        0.0%        0.0%        0.0%       50.0%   
    HSC-IP NHL                                2            0.0%        0.0%        0.0%        0.0%       30.0%       40.0%   
    HSC-IP MM                                 2            0.0%        0.0%        0.0%        0.0%       30.0%       40.0%   
    HSC-IP Breast Cancer                      2            0.0%        0.0%        0.0%        0.0%        5.0%       10.0%   

    HSC-IP AIS                                2            0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IU-GD                                 2            0.0%        0.0%        0.0%        0.0%        0.0%       40.0%   
    HSC-GT                                    2            0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-TI                                    2            0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IP Leukemia                           2            0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   

Europe:
    Cancer:
    HSC-IP CLL                                             0.0%        0.0%        0.0%       50.0%       60.0%       60.0%   
    HSC-IP NHL                                             0.0%        0.0%        0.0%       30.0%       40.0%       50.0%   
    HSC-IP MM                                              0.0%        0.0%        0.0%       30.0%       40.0%       50.0%   
    HSC-IP Breast Cancer                                   0.0%        0.0%        0.0%        5.0%       10.0%       20.0%   

    HSC-IP AIS                                             0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IU-GD                                              0.0%        0.0%        0.0%        0.0%        0.0%       40.0%   
    HSC-GT                                                 0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-TI                                                 0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
    HSC-IP Leukemia                                        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   

Japan:
    Cancer:
    HSC-IP CLL                                             0.0%         0.0%       0.0%         0.0%        0.0%      50.0%   
    HSC-IP NHL                                             0.0%         0.0%       0.0%         0.0%        0.0%      30.0%   
    HSC-IP MM                                              0.0%         0.0%       0.0%         0.0%        0.0%      30.0%   
    HSC-IP Breast Cancer                                   0.0%         0.0%       0.0%         0.0%        0.0%       5.0%   

    HSC-IP AIS                                             0.0%         0.0%       0.0%         0.0%        0.0%       0.0%   
    HSC-IU-GD                                              0.0%         0.0%       0.0%         0.0%        0.0%       0.0%   
    HSC-GT                                                 0.0%         0.0%       0.0%         0.0%        0.0%       0.0%   
    HSC-TI                                                 0.0%         0.0%       0.0%         0.0%        0.0%       0.0%   
    HSC-IP Leukemia                                        0.0%         0.0%       0.0%         0.0%        0.0%       0.0%   
</TABLE>


                                695.0%      910.0%     1075.0%     1240.0%     
Market Share Adjusted for                                                   
Product Delays                   2002        2003        2004        2005      
                                 ----        ----        ----        ----      
U.S. Market  
    Cancer:                                                                    
    HSC-IP CLL                   60.0%       65.0%       70.0%       70.0%     
    HSC-IP NHL                   50.0%       60.0%       70.0%       70.0%     
    HSC-IP MM                    50.0%       60.0%       70.0%       70.0%     
    HSC-IP Breast Cancer         20.0%       30.0%       30.0%       30.0%     

    HSC-IP AIS                   25.0%       35.0%       45.0%       50.0%     
    HSC-IU-GD                    45.0%       50.0%       55.0%       60.0%     
    HSC-GT                       10.0%       20.0%       30.0%       40.0%     
    HSC-TI                        0.0%        0.0%        0.0%       20.0%     
    HSC-IP Leukemia               0.0%        0.0%       20.0%       30.0%     
                                                                               
Europe:                                                                        
    Cancer:                                                                    
    HSC-IP CLL                   65.0%       65.0%       70.0%       70.0%     
    HSC-IP NHL                   60.0%       70.0%       70.0%       70.0%     
    HSC-IP MM                    60.0%       70.0%       70.0%       70.0%     
    HSC-IP Breast Cancer         30.0%       30.0%       30.0%       30.0%     

    HSC-IP AIS                   25.0%       35.0%       45.0%       50.0%     
    HSC-IU-GD                    45.0%       50.0%       55.0%       60.0%     
    HSC-GT                        0.0%       10.0%       30.0%       40.0%     
    HSC-TI                        0.0%        0.0%        0.0%       20.0%     
    HSC-IP Leukemia               0.0%        0.0%        0.0%       20.0%     
                                                                               
Japan:                                                                         
    Cancer:                                                                    
    HSC-IP CLL                   60.0%       65.0%       70.0%       70.0%     
    HSC-IP NHL                   40.0%       50.0%       60.0%       70.0%     
    HSC-IP MM                    40.0%       50.0%       60.0%       70.0%     
    HSC-IP Breast Cancer         10.0%       20.0%       30.0%       30.0%     

    HSC-IP AIS                    0.0%       35.0%       40.0%       50.0%     
    HSC-IU-GD                     0.0%       40.0%       45.0%       50.0%     
    HSC-GT                        0.0%        0.0%       10.0%       30.0%     
    HSC-TI                        0.0%        0.0%        0.0%        0.0%     
    HSC-IP Leukemia               0.0%        0.0%        0.0%        0.0%     

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>
                                    1996        1997        1998        1999        2000        2001        2002        2003  
                                    ----        ----        ----        ----        ----        ----        ----        ----  
<S>                                   <C>         <C>         <C>         <C>         <C>       <C>       <C>        <C>     
Schedule of Revenues

U.S. Market
    Cancer:
    HSC-IP CLL                        $0          $0          $0          $0          $0        $268      $1,989      $2,962  
    HSC-IP NHL                         -           -           -           -       3,311      22,226      33,821      45,017  
    HSC-IP MM                          -           -           -           -         894       5,889       8,846      10.932  
    HSC-IP Breast Cancer               -           -           -           -       2,016      19,383      52,153      90,648  

    HSC-IP AIS                         -           -           -           -         -           -        12,835      35,254  
    HSC-IU-GD                          -           -           -           -         -         5,067       8,796      13,432  
    HSC-GT                             -           -           -           -         -           -         2,825      34,919  
    HSC-TI                             -           -           -           -         -           -           -           - 
    HSC-IP Leukemia                    -           -           -           -         -           -           -           - 
    Total U.S. Market                 $0          $0          $0          $0      $6,221     $52,833    $121,265    $233,164 
                                                                                                                  
Europe:                                                                                                           
    Cancer:                                                                                                       
    HSC-IP CLL                        $0          $0          $0        $213        $750      $1,548      $2,589      $3,554 
    HSC-IP NHL                         -           -           -       6,000      18,834      27,280      41,211      58,524 
    HSC-IP MM                          -           -           -       1,666       5,718       8,835      12,740      15,306 
    HSC-IP Breast Cancer               -           -           -       2,852      16,453      39,542      79,792      92,460 

    HSC-IP AIS                         -           -           -         -           -           -        15,402      42,305 
    HSC-IU-GD                          -           -           -         -           -        -1,291       8,980      13,705 
    HSC-GT                             -           -           -         -           -           -           -        12,571 
    HSC-TI                             -           -           -         -           -           -           -           - 
    USC-IP Leukemia                    -           -           -         -           -           -           -           - 
    Total Europe Market               $0          $0          $0     $10,731     $41,755     $78,495    $160,716    $238,426 

Japan:
     Cancer:
     HSC-IP CLL                       $0          $0          $0          $0          $0        $134        $997      $1,481 
     HSC-IP NHL                        -           -           -         -           -         1,705      11,448      17,420 
     HSC-IP MM                         -           -           -         -           -           368       2,528       3,907 
     HSC-IP Breast Cancer              -           -           -         -           -           450       5.541      14,100 

     HSC-IP AIS                        -           -           -         -           -           -           -         6,610 
     HSC-IU-GD                         -           -           -         -           -           -           -         1,141 
     HSC-GT                            -           -           -         -           -           -           -           - 
     HSC-TI                            -           -           -         -           -           -           -           - 
     HSC-IP Leukemia                   -           -           -         -           -           -           -           - 
     Total Japan Market               $0          $0          $0          $0          $0      $2,657     $20,515      $44658 
Total Product Revenues                $0          $0          $0     $10,731     $47,975    $133,985    $302,496    $516,248 
</TABLE>


                                  2004         2005    
                                  ----         ----    
Schedule of Revenues

U.S. Market                              
    Cancer:                                            
    HSC-IP CLL                  $4,106       $5,073    
    HSC-IP NHL                  54,100       55.720    
    HSC-IP MM                   13,140       13.531    
    HSC-IP Breast Cancer       116,708      120,210    
                                         
    HSC-IP AIS                  56,024       64,116    
    HSC-IU-GD                   15,210       17,101    
    HSC-GT                      71,931      148,182    
    HSC-TI                         -         12,916    
    HSC-IP Leukemia             24,819       47,931    
    Total U.S. Market         $356,039     $484,780    
                                                       
Europe:                                                
    Cancer:                                            
    HSC-IP CLL                  $4,929       $6,092    
    HSC-IP NHL                  64,914       66,864    
    HSC-IP MM                   15,769       16,243    
    HSC-IP Breast Cancer       119,041      122,613    
                                                       
    HSC-IP AIS                  67,229       76,940    
    HSC-IU-GD                   15,526       17,445    
    HSC-GT                      56,108      100,764    
    HSC-TI                         -         -5,489    
    USC-IP Leukemia                -         32,593    
    Total Europe Market       $343,517     $445,043    
                                                       
Japan:                                                 
     Cancer:                                           
     HSC-IP CLL                 $2,053       $2,536    
     HSC-IP NHL                 23,183       27,860    
     HSC-IP MM                   5,632        6,766    
     HSC-IP Breast Cancer       30,343       36,063    
                                                       
     HSC-IP AIS                 14,524       26,715    
     HSC-IU-GD                   4,042        6,061    
     HSC-GT                      5,395       24,079    
     HSC-TI                        -            -    
     HSC-IP Leukemia               -            -    
     Total Japan Market        $85,172     $130,079    
Total Product Revenues        $784,728   $1,059,902   

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>

                                                        1996        1997        1998        1999        2000        2001     
                                                        ----        ----        ----        ----        ----        ----     
<S>                                                   <C>          <C>          <C>          <C>          <C>          <C>      
Schedule of U.S. and Europe Revenues

U.S. and Europe
     Cancer:
     HSC-IP CLL                                       $    0       $    0       $    0       $   213      $   750      $  1,816
     HSC-I P NUL                                        --           --           --           6.000       22.144        49,506
     HSC-I P MM                                                                                1,666        6,612        14,724
     HSC-IP Breast Cancer                               --           --           --           2,852       18,469        58,924
                                                      ------       ------       ------       -------      -------      --------
     Total Cancer                                       --           --           --          10,731       47,975       124,970
                                                                                                                      
     HSC-IP AIS                                         --           --           --            --           --            --   
     HSC-I U-GD                                         --           --           --            --           --            --   
     HSC-GT                                             --           --           --            --           --           6,358
     HSC-TI                                             --           --           --            --           --            --   
     HSC-IP Leukemia                                                                                                  
     Total US. and Europe                             $    0       $    0       $    0       $10,731       47,975       131,328
                                                                                                                      
Schedule of HIV Profit Distribution                                                                                   
Eligible Patients                                                                                                     
    HSC-GT HIV (Symptom/Asymtom) - US                   --           --           --            --           --           1,019
    HSC-GT HIV (Symptom/Asymtom) - EU                   --           --           --            --           --            --   
    HSC-GT HIV (Symptom/Asympt) - JPN                   --           --           --            --           --            --   
                                                                                                                      
Market Share per Sprint's Business Plan                                                                               
    HSC-GT HIV (Symptom/Asympt) - US                     0.0%         0.0%         0.0%          0.0%         0.0%         50.0%
    HSC-GT HIV (Symptom/Asympt) - EU                     0.0%         0.0%         0.0%          0.0%         0.0%          0.0%
    HSC-GT HIV (Symptom/Asympt) - JPN                    0.0%         0.0%         0.0%          0.0%         0.0%          0.0%
                                                                                                                      
Market Share adjusted Product Launch Delays                                                                           
    HSC-GT HIV (Symptom/Asympt) - US                     0.0%         0.0%         0.0%          0.0%         0.0%          0.0%
    HSC-GT HIV (Symptom/Asympt) - EU                     0.0%         0.0%         0.0%          0.0%         0.0%          0.0%
    HSC-GT HIV (Symptom/Asympt) - JPN                    0.0%         0.0%         0.0%          0.0%         0.0%          0.0%
                                                                                                                      
Revenues                                                                                                              
    HSC-GT HIV (Symptom/Asympt) - US                  $    0       $    0       $    0       $     0      $     0      $      0
    HSC-GT HIV (Symptom/Asympt) - EU                    --           --           --            --           --            --   
    HSC-GT IIIV (Symptom/Asympt) - JPN                  --           --           --            --           --            --   
                                                                                                                      
    Total HIV Revenues                                  --           --           --            --           --            --   
    Cost of goods sold                                  --           --           --            --           --            --   
    SG&A (per Sandoz)                                   --           --           --            --           --           1,528
                                                      ------       ------       ------       -------      -------      --------
    Operating profit                                    --           --           --            --           --          (1,528)
                                                                                                                      
    Special advance repayment                           --           --           --            --           --           5,238    
    Number of Centers Rolled Out (Sprint)               --           --           --            --           --               1
    Number of Centers built @ 15,000 patients/center    --           --           --            --           --            --   
    Cost                                                --           --           --            --           --            --   
    Profit available for distribution                   --           --           --            --           --            --   
    HSC-GT HIV Profit Distribution                    $    0       $    0       $    0       $     0      $     0      $      0
                                                                                                                      

<CAPTION>
                                                          2002       2003      2004        2005        
                                                          ----       ----      ----        ----        
<S>                                                   <C>        <C>        <C>        <C>     
Schedule of U.S. and Europe Revenues

U.S. and Europe                                                                                        
     Cancer:                                                                                             
     HSC-IP CLL                                       $  4,578   $  6,517   $  9,035   $ 11,165
     HSC-IP NHL                                         75,032    103,542    119,014    122,585
     HSC-IP MM                                          21,586     26,239     28,910     29,774
     HSC-IP Breast Cancer                              131,945    183,108    235,750    242,823
                                                      --------   --------   --------   --------
     Total Cancer                                      233,142    319,405    392,708    406,347

     HSC-IP AIS                                         28,238     77,559    123,254    141,056
     HSC-IU-GD                                           2,825     47,489    128,039    248,945
     HSC-GT                                             17,776     27,136     30,736     34,545
     HSC-TI                                               --         --         --       18,405
     HSC-IP Leukemia                                      --         --       24,819     80,524
     Total U.S. and Europe                             281,981    471,590    699,556    929,822

Schedule of HIV Profit Distribution
Eligible Patients
    HSC-GT HIV (Symptom/Asymtom) - US                   11,654     19,036     41,533     50,306
    HSC-GT HIV (Symptom/Asymtom) - EU                    1,489      4,984     12,592     16,920
    HSC-GT HIV (Symptom/Asympt) - JPN                     --         --         --          174

Market Share per Sprint's Business Plan
    HSC-GT HIV (Symptom/Asympt) - US                      50.0%      50.0%      50.0%      50.0%
    HSC-GT HIV (Symptom/Asympt) - EU                      50.0%      50.0%      50.0%      50.0%
    HSC-GT HIV (Symptom/Asympt) - JPN                      0.0%       0.0%       0.0%      50.0%

Market Share adjusted Product Launch Delays
    HSC-GT HIV (Symptom/Asympt) - US                      50.0%      50.0%      50.0%      50.0%
    HSC-GT HIV (Symptom/Asympt) - EU                       0.0%      50.0%      50.0%      50.0%
    HSC-GT HIV (Symptom/Asympt) - JPN                      0.0%       0.0%       0.0%       0.0%

Revenues
    HSC-GT HIV (Symptom/Asympt) - US                  $ 81,581   $133,255   $290,730   $352,139
    HSC-GT HIV (Symptom/Asympt) - EU                      --       34,888     88,141    118,443
    HSC-GT HIV (Symptom/Asympt) - JPN                     --         --         --         --   

    Total HIV Revenues                                  81,581    168,143    378,871    470,582
    Cost of goods sold                                  29,802     58,794    131,851    165,045
    SG&A (per Sandoz)                                    4,130     19,101     57,386     76,558
                                                      --------   --------   --------   --------
    Operating profit                                    47,649     90,248    189,635    228,979

    Special advance repayment                           53,834       --         --         --   
    Number of Centers Rolled Out (Sprint)                    1          2          1       --   
    Number of Centers built @ 15,000 patients/center         1       --            1          1
    Cost                                                10,229       --       10,229     10,229
    Profit available for distribution                     --       90,248    179,406    218,750
    HSC-GT HIV Profit Distribution                    $      0   $ 45,124   $ 89,703   $109,375
</TABLE>


<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>
                                                          1996        1997        1998        1999        2000        2001   
                                                          ----        ----        ----        ----        ----        ----   
<S>                                                      <C>         <C>         <C>         <C>         <C>        <C>    
Schedule of Other Revenues  

Collaborations:
    HIV Gene Therapy                                     $5,445      $6,197      $6,259      $6,322      $6,385     $6,449 
    REVI23 TRD                                            4,816       8,063       8,196       8,851       6,735      6,873 
    REV 123 CRD                                           2,616       3,818       4,089       4,828       5,158      2,675 
    Gene Discovery                                          500       2,000       2,000       2,000       1,500        - 
    Genentech TPO                                            96         -           -           -           -          - 
    Japan Cell Center Deal                                  375       1,500       1,500       1,125         -          - 
    Double Positive Selection Device                        -           750       3,000       3,000       2,250        - 
    Total Collaborations                     $2,320     $13,848     $22,328     $25,044     $26,126     $22,028    $15,997 


Milestone Payments
    Gene Discovery                                        $2,000        $500      $3,000      $2,000      $3,000    $3,000 
    Japan Cell Center Deal                                 3,500       5,500       4,000       3,500       5,000       -
    Double Positive Selection Device                       3,000       2,000       3,000         -         4,000       -
    Total Milestone Payments                              $5,500      $9,000      $9,000      $5,000      $6,500   $12,000 


Royalties
    Gene Discovery
    Double Positive Selection Device                                                              25          50       100
    Japan Product Sales
    HSC-IP CLL                                               -           -           -           -           -          13
    HSC-IP NHL                                               -           -           -           -           -         171
    HSC-IP MM                                                -           -           -           -           -          37
    HSC-IP BC                                                -           -           -           -           -          45
                                                          
    HSC-IP AIS                                               -           -           -           -           -         -
    HSC-IU-GD                                                -           -           -           -           -         -
    HSC-GT                                                   -           -           -           -           -         -
    HSC-TI                                                                                                              
    HSC-IP Leukemia                                       
    Total Royalties                                           $0          $0          $0         $25         $50      $366
    Grants                                                   145         -           -           -           -          -
    Other                                                    185         200         -           -           -          -

<CAPTION>
                                                    2002        2003        2004       2005         
                                                    ----        ----        ----       ----         
<S>                                                <C>            <C>         <C>        <C>       
Schedule of Other Revenues 

Collaborations:                                                                                    
    HIV Gene Therapy                               $6,513          $0          $0         $0        
    REV 123 TRD                                     6,991         -           -          -        
    REV 123 CRD                                     1,714       1,173         -          -        
    Gene Discovery                                    -           -           -          -        
    Genentech TPO                                     -           -           -          -        
    Japan Cell Center Deal                            -           -           -          -        
    Double Positive Selection Device                  -           -           -          -        
    Total Collaborations                          $15,218      $1,173          $0         $0       
                                                                                                   
                                                                                                   
Milestone Payments                                                                                 
    Gene Discovery                                 $3,000      $8,000      $5,000         $0       
    Japan Cell Center Deal                            -           -           -          -      
    Double Positive Selection Device                  -           -           -          -      
    Total Milestone Payments                       $3,000      $8,000      $5,000         $0       
                                                                                                   
                                                                                                   
Royalties                                                                                          
    Gene Discovery                                             $1,000      $4,000     $5,000       
    Double Positive Selection Device                  200         325         475        600       
    Japan Product Sales                                                                            
    HSC-IP CLL                                        100         148         205        254       
    HSC-IP NHL                                      1,145       1,742       2,318      2,786       
    HSC-IP MM                                         253         391         563        677       
    HSC-IP BC                                         554       1,410       3,034      3,606       
                                                                                                   
    HSC-IP AIS                                        -           661       1,452      2,672       
    HSC-IU-GD                                         -           114         404        606       
    HSC-GT                                            -           -           539      2,408       
    HSC-TI                                            -           -           -          -         
    HSC-IP Leukemia                                   -           -           -          -        
    Total Royalties                                $2,251      $5,791     $12,992    $18,608       
    Grants                                            -           -           -          -       
    Other                                             -           -           -          -       

</TABLE>
                                                                       

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================
<TABLE>
<CAPTION>
                                                                1996        1997         1998        1999        2000         2001 
                                                                ----        ----         ----        ----        ----         ---- 
<S>                                                          <C>         <C>          <C>         <C>         <C>          <C>     
Mfg. Costs as a % of Revenue Per Sprint's Business Plan
  HSC-IP CLL                                                                             21.7%       21.7%       21.8%        21.8%
  HSC-IP NHL                                                                             21.7%       21.7%       21.8%        21.8%
  HSC-IP MM                                                                              21.7%       21.7%       21.8%        21.8%
  HSC-IP Breast Cancer                                                                   21.7%       21.7%       21.8%        21.8%

  HSC-IP AIS                                                                                                                  21.8%
  HSC-IU-GD                                                                                                       5.4%         5.4%
  HSC-GT                                                                                                                      24.1%
  HSC-TI                                                                                                                           
  HSC-IP Leukemia                                                                                                                  
  HSC-GT HIV I Profit Dist. (Symptom/Asympt)                                                                                  24.3%

Mfg. Costs as a % of Revenue Adjusted for Product Shift
  HSC-IP CLL                                                                              0.0%       21.7%       21.7%        21.8%
  HSC-IP NHL                                                                              0.0%       21.7%       21.7%        21.8%
  HSC-IP MM                                                                               0.0%       21.7%       21.7%        21.8%
  HSC-IP Breast Cancer                                                                    0.0%       21.7%       21.7%        21.8%

  HSC-IP AIS                                                                              0.0%        0.0%        0.0%         0.0%
  HSC-IU-GD                                                                               0.0%        0.0%        0.0%         5.4%
  HSC-GT                                                                                  0.0%        0.0%        0.0%         0.0%
  HSC-TI                                                                                  0.0%        0.0%        0.0%         0.0%
  HSC-IP Leukemia                                                                         0.0%        0.0%        0.0%         0.0%
  HSC-GT HIV I Profit Dist. (Symptom/Asympt)                                              0.0%        0.0%        0.0%         0.0%

Mfg. Costs in $'s Adjusted for Product Shift
  HSC-IP CLL                                                                               $0         $46        $163         $396 
  HSC-IP NHL                                                                                -       1,302       4,805       10,792 
  HSC-IP MM                                                                                 -         361       1,435        3,210 
  HSC-IP Breast Cancer                                                                      -         619       4,008       12,845 

  HSC-IP AIS                                                                                -           -           -            - 
  HSC-IU-GD                                                                                 -           -           -          343 
  HSC-GT                                                                                    -           -           -            - 
  HSC-TI                                                                                    -           -           -            - 
  HSC-IP Leukemia                                                                           -           -           -            - 

  Manufacturing Costs                                              -           -            -       2,329      10,411       27,587 

  MAbs manufacturing costs                                    10,704      14,200       14,177      13,318      12,428       12,208 
  Page Mill Cell Center                                        2,010       3,030        3,030       2,830       2,210        2,050 
  Lyon Cell Center                                             2,689       3,019        3,099       3,099       3,049        2,789 
  Total Manufacturing Costs                      $0          $15,403     $20,249      $20,306     $21,576     $28,098      $44,634 

<CAPTION>
                                                                2002        2003         2004        2005
                                                                ----        ----         ----        ----
<S>                                                             <C>         <C>          <C>         <C>  
Mfg. Costs as a % of Revenue Per Sprint's Business Plan
  HSC-IP CLL                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IP NHL                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IP MM                                                     21.8%       21.8%        21.8%       21.8%
  HSC-IP Breast Cancer                                          21.8%       21.8%        21.8%       21.8%

  HSC-IP AIS                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IU-GD                                                      5.4%        5.5%         5.4%        5.5%
  HSC-GT                                                        24.1%       24.1%        24.1%       24.1%
  HSC-TI                                                                                 16.3%       16.4%
  HSC-IP Leukemia                                                           16.6%        16.6%       16.6%
  HSC-GT HIV I Profit Dist. (Symptom/Asympt)                    24.3%       24.3%        24.3%       24.3%

Mfg. Costs as a % of Revenue Adjusted for Product Shift
  HSC-IP CLL                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IP NHL                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IP MM                                                     21.8%       21.8%        21.8%       21.8%
  HSC-IP Breast Cancer                                          21.8%       21.8%        21.8%       21.8%

  HSC-IP AIS                                                    21.8%       21.8%        21.8%       21.8%
  HSC-IU-GD                                                      5.4%        5.4%         5.4%        5.4%
  HSC-GT                                                        24.1%       24.1%        24.1%       24.1%
  HSC-TI                                                         0.0%        0.0%         0.0%       16.3%
  HSC-IP Leukemia                                                0.0%        0.0%        16.6%       16.6%
  HSC-GT HIV I Profit Dist. (Symptom/Asympt)                    24.3%       24.3%        24.3%       24.3%

Mfg. Costs in $'s Adjusted for Product Shift
  HSC-IP CLL                                                    $998      $1,421       $1,970      $2,434
  HSC-IP NHL                                                  16,357      22,572       25,945      26,723
  HSC-IP MM                                                    4,706       5,720        6,302       6,491
  HSC-IP Breast Cancer                                        28,764      39,917       51,393      52,936

  HSC-IP AIS                                                   6,156      16,908       26,869      30,750
  HSC-IU-GD                                                      960       1,479        1,675       1,883
  HSC-GT                                                         680      11,424       30,800      59,884
  HSC-TI                                                           -           -            -       3,000
  HSC-IP Leukemia                                                  -           -        4,120      13,367

  Manufacturing Costs                                         58,650      99,441      149,075     197,467

  MAbs manufacturing costs                                    12,208      12,208       12,208      12,208
  Page Mill Cell Center                                        2,091       2,133        2,175       2,219
  Lyon Cell Center                                             2,845       2,902        2,960       3,019
  Total Manufacturing Costs                                  $75,764    $116,684     $166,418    $214,913
</TABLE>

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
                                                  1995        1996         1997       1998         1999         2000      2001   
                                                  ----        ----         ----       ----         ----         ----      ----   
<S>                                              <C>          <C>         <C>         <C>         <C>         <C>        <C>     
Schedule of Research & Development
  Internal research programs                                  $8,604      $8,690      $8,777      $9,040      $9,312          
  Internal development programs                               12,761      14,113      14,745      15,187      15,643
  Internal clinical program                                    4,070       5,586      11,836      12,191      12,557
  HIV Gene Rx Research program                                 6,136       6,197       6,259       6,447       6,640
  REV 123 development program                                  4,807       8,063       8,196       8,442       8,695
  REV 123 clinical program                                     2,616       3,818       4,089       4,212       4,338
  Technology acquisitions                                        990       1,500       1,500       1,545       1,591
  Total Research & Development                   $46,733     $39,984     $47,967     $55,402     $57,064     $58,776     $23,954 

Schedule of SG&A

  G&A                                                         $5,010      $5,160      $5,315      $5,475      $5,639
  US business development                                      1,341       1,908       1,965       2,024       2,085
  EU business development                                        384         509         524         540         556
  US marketing / sales                                             -           -       1,211       1,505       2,015
  EU marketing / sales                                             -           -         550         748       1,089
  Total SG&A                                      $8,110      $6,735      $7,577      $9,566     $10,292     $11,384      $7,985 

    Total Operating Expenses                      54,843      62,122      75,793      85,274      88,931      98,258      76,572 
  EBIT                                          ($51,227)   ($42,444)   ($44,265)   ($51,230)   ($47,049)   ($21,704)    $83,119 

Schedule of Net Operating Losses and Taxes
Net Operating Loss
  NOL, beginning of year                                   ($120,000)  ($162,444)  ($206,709)  ($257,939)  ($304,988)  ($326,692)
  NOL utilization                                            (42,444)    (44,265)    (51,230)    (47,049)    (21,704)     83,119
  NOL, end of year                                          (162,444)   (206,709)   (257,939)   (304,988)   (326,692)   (243,574)
  Income taxes                                        $0          $0          $0          $0          $0          $0          $0 

<CAPTION>
                                                  2002        2003        2004        2005
                                                  ----        ----        ----        ----
<S>                                              <C>         <C>         <C>          <C>    
Schedule of Research & Development
  Internal research programs                    
  Internal development programs                 
  Internal clinical program                     
  HIV Gene Rx Research program                  
  REV 123 development program                   
  REV 123 clinical program                      
  Technology acquisitions                       
  Total Research & Development                    $45,368     $79,752    $121,088    $158,671

Schedule of SG&A

  G&A                                           
  US business development                       
  EU business development                       
  US marketing / sales                          
  EU marketing / sales                          
  Total SG&A                                      $15,123     $26,584     $40,363     $52,890

    Total Operating Expenses                      136,254     223,019     327,868     426,474
  EBIT                                           $166,196    $308,658    $479,383    $631,331

Schedule of Net Operating Losses and Taxes
Net Operating Loss
  NOL, beginning of year                        ($243,574)   ($77,377)         $0          $0
  NOL utilization                                 166,196      77,377           -           -
  NOL, end of year                                (77,377)          -           -           -
  Income taxes                                         $0     $94,825    $196,547    $258,846
</TABLE>

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
Schedule of Capital Expenditures       Cost        1996        1997         1998        1999        2000         2001        2002  
                                       ----        ----        ----         ----        ----        ----         ----        ----  
<S>                                     <C>        <C>         <C>          <C>         <C>         <C>          <C>         <C>
Number of Facilities
  Convertible HSCS - equipment          5,191           0           1            1           0           0            0           0
  Convertible HSCS - Improvements       4,200           0           1            1           0           0            0           0
  Equipment on lease                   10,772           0           0            0           1           0            0           0
  DPSD - equipment                      3,992           0           0            0           0           2            1           2
  DPSD - Improvements                   4,200           0           0            0           0           2            1           2
  Conversion - equipment                1,536           0           0            0           0           0            2           0
  Conversion - improvements               250           0           0            0           0           0            2           0
  HIV - equipment                       4,529           0           0            0           0           0            0           0
  HIV - improvments                     5,700           0           0            0           0           0            0           0

Capital expenditures                              $60,776     $63,551      $77,739     $92,670    $109,148     $131,410    $145,569
  Beginning equipment/building imp.                 2,775       4,797        5,540       5,706       5,878        2,395       4,537
  R&D related equipment                                 -       5,191        5,191           -           -            -           -
  Convertible HSCS - equipment                          -       4,200        4,200           -           -            -           -
  Convertible HSCS - Improvments                        -           -            -      10,772           -            -           -
  Equipment on lease                                    -           -            -           -       7,984        3,992       7,984
  DPSD - equipment                                      -           -            -           -       8,400        4,200       8,400
  DPSD - Improvements                                   -           -            -           -           -        3,072           -
  Conversion - equipment                                -           -            -           -           -          500           -
  Conversion - improvements                             -           -            -           -           -            -           -
  HIV - equipment                                       -           -            -           -           -            -           -
  HIV - improvements                                    -           -            -           -           -            -           -
  Total capital expenditures            4,259       2,775      14,188       14,931      16,478      22,262       14,159      20,921
  Ending Equipment/Building Imp.                  $63,551     $77,739      $92,670    $109,148    $131,410     $145,569    $166,490

Depreciation and amortization
  Equipment                                        $2,775      $4,797       $5,540      $5,706      $5,878       $2,395      $4,537
  R&D related equipment                                 -       5,191        5,191           -           -            -           -
  Convertible HCSC - equipment                          -           -            -           -       7,984        3,992       7,984
  DPSD - equipment                                      -           -            -           -           -        3,072           -
  Conversion - equipment                                -           -            -           -           -            -           -
  HIV - equipment                                       -           -            -           -           -            -           -
  Total                                            $2,775      $9,988      $10,731      $5,706     $13,862       $9,459     $12,521

Improvements
  Convertible HSCS - Improvements                      $0      $4,200       $4,200          $0          $0           $0          $0
  DPSD - Improvements                                   -           -            -           -       8,400        4,200       8,400
  Conversion - improvements                             -           -            -           -           -          500           -
  HIV - improvements                                    -           -            -           -           -            -           -
  Total Improvements                                   $0      $4,200       $4,200          $0      $8,400       $4,700      $8,400
</TABLE>

Schedule of Capital Expenditures         2003         2004        2005
                                         ----         ----        ----
Number of Facilities
  Convertible HSCS - equipment                0            0           0
  Convertible HSCS - Improvements             0            0           0
  Equipment on lease                          0            0           0
  DPSD - equipment                            2            1           0
  DPSD - Improvements                         2            1           0
  Conversion - equipment                      0            0           0
  Conversion - improvements                   0            0           0
  HIV - equipment                             0            0           0
  HIV - improvments                           0            0           0

Capital expenditures                   $166,490     $190,849    $211,150
  Beginning equipment/building imp.       7,975       12,109      15,867
  R&D related equipment                       -            -           -
  Convertible HSCS - equipment                -            -           -
  Convertible HSCS - Improvments              -            -           -
  Equipment on lease                      7,984        3,992           -
  DPSD - equipment                        8,400        4,200           -
  DPSD - Improvements                         -            -           -
  Conversion - equipment                      -            -           -
  Conversion - improvements                   -            -           -
  HIV - equipment                             -            -           -
  HIV - improvements                          -            -           -
  Total capital expenditures             24,359       20,301      15,867
  Ending Equipment/Building Imp.       $190,849     $211,150    $227,017

Depreciation and amortization
  Equipment                              $7,975      $12,109     $15,867
  R&D related equipment                       -            -           -
  Convertible HCSC - equipment            7,984        3,992           -
  DPSD - equipment                            -            -           -
  Conversion - equipment                      -            -           -
  HIV - equipment                             -            -           -
  Total                                 $15,959      $16,101     $15,867

Improvements
  Convertible HSCS - Improvements            $0           $0          $0
  DPSD - Improvements                     8,400        4,200           -
  Conversion - improvements                   -            -           -
  HIV - improvements                          -            -           -
  Total Improvements                     $8,400       $4,200          $0

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
Schedule of Capital Expenditures and Depreciation                1996         1997        1998        1999         2000        2001
                                                                 ----         ----        ----        ----         ----        ----
<S>                                                              <C>          <C>         <C>         <C>          <C>        <C>
Depreciation
  Equipment - 1996                                               $555         $555        $555        $555         $555
  Equipment - 1997                                                           1,998       1,998       1,998        1,998       1,998
  Equipment - 1998                                                                       2,146       2,146        2,146       2,146
  Equipment - 1999                                                                                   1,141        1,141       1,141
  Equipment - 2000                                                                                                2,772       2,772
  Equipment - 2001                                                                                                            1,892
  Equipment - 2002                                                                                                                 
  Equipment - 2003                                                                                                                 
  Equipment - 2004                                                                                                                 
  Equipment - 2005                                                                                                                 
  Total Depreciation - Equipment                                 $555       $2,553      $4,699      $5,840       $8,612      $9,949

  Improvements - existing assets                               $9,454        9,585       9,085       6,085        4,586       4,140
  Improvements - 1996                                               0            -
  Improvements - 1997                                                          140         140         140          140         140
  Improvements - 1998                                                                      140         140          140         140
  Improvements - 1999                                                                                    -            -           -
  Improvements - 2000                                                                                               280         280
  Improvements - 2001                                                                                                           157
  Improvements - 2002                                                                                                              
  Improvements - 2003                                                                                                              
  Improvements - 2004                                                                                                              
  Improvements - 2005                                                                                                              
  Total Depreciation - Improvements                            $9,454       $9,725      $9,365      $6,365       $5,146      $4,857

  Total Depreciation                               $9,742     $10,009      $12,278     $14,064     $12,205      $13,758     $14,806


<CAPTION>
Schedule of Capital Expenditures and Depreciation   2002         2003        2004        2005
                                                    ----         ----        ----        ----
<S>                                              <C>          <C>         <C>         <C>    
Depreciation
  Equipment - 1996                               
  Equipment - 1997                               
  Equipment - 1998                                 2,146
  Equipment - 1999                                 1,141        1,141
  Equipment - 2000                                 2,772        2,772       2,772
  Equipment - 2001                                 1,892        1,892       1,892       1,892
  Equipment - 2002                                 2,504        2,504       2,504       2,504
  Equipment - 2003                                              3,192       3,192       3,192
  Equipment - 2004                                                          3,220       3,220
  Equipment - 2005                                                                      3,173
  Total Depreciation - Equipment                 $10,456      $11,501     $13,580     $13,981

  Improvements - existing assets                   5,138        6,284       6,425       8,197
  Improvements - 1996                            
  Improvements - 1997                                140          140         140         140
  Improvements - 1998                                140          140         140         140
  Improvements - 1999                                  -            -           -           -
  Improvements - 2000                                280          280         280         280
  Improvements - 2001                                157          157         157         157
  Improvements - 2002                                280          280         280         280
  Improvements - 2003                                             280         280         280
  Improvements - 2004                                                         140         140
  Improvements - 2005                                                                       -
  Total Depreciation - Improvements               $6,134       $7,561      $7,842      $9,614

  Total Depreciation                             $16,590      $19,061     $21,422     $23,595
</TABLE>

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
Depreciation - HIV Centers                 Cost    1996      1997     1998      1999      2000      2001      2002      2003  
                                           ----    ----      ----     ----      ----      ----      ----      ----      ----  
<S>                                       <C>       <C>       <C>      <C>       <C>       <C>       <C>       <C>       <C>
Schedule of Capital Expenditures - HIV
  HIV - equipment                         4,529       0         0        0         0         0         0         1         0  
  HIV - improvements                      5,700       0         0        0         0         0         0         1         0  

  HIV - equipment                                    $0        $0       $0        $0        $0    $4,529        $0    $4,529  
  HIV - improvements                                  -         -        -         -         -     5,700         -     5,700  

Schedule of Depreciation - HIV
Depreciation
  Equipment - 1996                                   $0        $0       $0        $0        $0
  Equipment - 1997                                              -        -         -         -         -
  Equipment - 1998                                                       -         -         -         -         -
  Equipment - 1999                                                                 -         -         -         -         -
  Equipment - 2000                                                                           -         -         -         -  
  Equipment - 2001                                                                                   906       906       906  
  Equipment - 2002                                                                                               -         -  
  Equipment - 2003                                                                                     -         -       906  
  Equipment - 2004                                                                                                            
  Equipment - 2005                                                                                     -                      
  Total Depreciation - HIV Equipment                 $0        $0       $0        $0        $0      $906      $906    $1,812  

  Improvements - 1996                                $0        $0       $0        $0        $0        $0        $0        $0  
  Improvements - 1997                                           -        -         -         -         -         -         -  
  Improvements - 1998                                                    -         -         -         -         -         -  
  Improvements - 1999                                                              -         -         -         -         -  
  Improvements - 2000                                                                        -         -         -         -  
  Improvements - 2001                                                                                190       190       190  
  Improvements - 2002                                                                                            -         -  
  Improvements - 2003                                                                                                    190  
  Improvements - 2004                                                                                                         
  Improvements - 2005                                                                                                         
  Total Depreciation - HIV Improvements              $0        $0       $0        $0        $0      $190      $190      $380  

  Total Depreciation - HIV                            -         -        -         -         -     1,096     1,096     2,192  

Depreciation - Sprint (50%)                          $0        $0       $0        $0        $0      $548      $548    $1,096  
</TABLE>

Depreciation - HIV Centers                   2004     2005
                                             ----     ----

Schedule of Capital Expenditures - HIV
  HIV - equipment                               1        1
  HIV - improvements                            1        1

  HIV - equipment                          $4,529       $0
  HIV - improvements                        5,700        -

Schedule of Depreciation - HIV
Depreciation
  Equipment - 1996                        
  Equipment - 1997                        
  Equipment - 1998                        
  Equipment - 1999                        
  Equipment - 2000                              -
  Equipment - 2001                            906      906
  Equipment - 2002                              -        -
  Equipment - 2003                            906      906
  Equipment - 2004                            906      906
  Equipment - 2005                                       -
  Total Depreciation - HIV Equipment       $2,717   $2,717

  Improvements - 1996                          $0       $0
  Improvements - 1997                           -        -
  Improvements - 1998                           -        -
  Improvements - 1999                           -        -
  Improvements - 2000                           -        -
  Improvements - 2001                         190      190
  Improvements - 2002                           -        -
  Improvements - 2003                         190      190
  Improvements - 2004                         190      190
  Improvements - 2005                                    -
  Total Depreciation - HIV Improvements      $570     $570

  Total Depreciation - HIV                  3,287    3,287

Depreciation - Sprint (50%)                $1,644   $1,644

<PAGE>

Valuation Analysis (Sensitivity Case 2)
================================================================================

<TABLE>
<CAPTION>
Schedule of Working Capital              1995       1996       1997        1998        1999        2000         2001        2002   
                                       --------   --------   --------    --------    --------    --------     --------    -------- 
<S>                                     <C>        <C>        <C>         <C>         <C>         <C>           <C>          <C>   
  Current assets
  A/R                                      $256       $200       $200          $0        $860      $3,842      $10,536     $22,739 
  Other current assets                    1,336        700        700         700         700         700          700         700 
                                       --------   --------   --------    --------    --------    --------     --------    -------- 
  Total current assets                    1,592        900        900         700       1,560       4,542       11,236      23,439 

  Current liabilities
  A/P and accruals                        6,681      6,559      7,579       8,527       8,893       9,826        7,657      13,625 
  Current portion of accrued rent            69          -          -           -         827         827          827         827 
  Noncurrent portion of accrued rent      4,565      4,723      4,841       4,959       4,132       3,305        2,478       1,651 
  Deferred revenue                        3,097      2,958      2,233       2,504       2,613       2,203        1,600       1,522 
                                       --------   --------   --------    --------    --------    --------     --------    -------- 
  Total current liabilities              14,412     14,240     14,653      15,991      16,465      16,161       12,562      17,625 

  Net working capital                   (12,820)   (13,340)   (13,753)    (15,291)    (14,904)    (11,619)      (1,326)      5,813 
  Net Investment in Working Capital          $0        520        413       1,538        (387)     (3,286)     (10,292)     (7,140)

Schedule of Common Stock

  Beginning common stock               $246,679   $246,679   $246,679    $270,179    $317,179    $317,179     $317,179    $317,179 
  Shares issued                               -          -      1,471       1,786           -           -            -           - 
  Price                                       -          -         17          28           -           -            -           - 
  Discount                                  6.0%       6.0%       6.0%        6.0%        6.0%        6.0%         6.0%        6.0%
  Net proceeds                                -          -     23,500      47,000           -           -            -           - 
  Ending common stock                  $246,679   $246,679   $270,179    $317,179    $317,179    $317,179     $317,179    $317,179 

Schedule of Shares Outstanding

  Beginning shares outstanding                      14,470     14,470      15,940      17,726      17,726       17,726      17,726 
  Shares issued                                          -      1,471       1,786           -           -            -           - 
  Ending shares outstanding              14,028     14,470     15,940      17,726      17,726      17,726       17,726      17,726 
</TABLE>

Schedule of Working Capital             2003         2004        2005
                                      --------     --------    --------
  Current assets
  A/R                                  $41,800      $64,180     $84,624
  Other current assets                     700          700         700
                                      --------     --------    --------
  Total current assets                  42,500       64,880      85,324

  Current liabilities
  A/P and accruals                      22,302       32,787      42,647
  Current portion of accrued rent          827          824           -
  Noncurrent portion of accrued rent       824            -           -
  Deferred revenue                         117            -           -
                                      --------     --------    --------
  Total current liabilities             24,070       33,611      42,647

  Net working capital                   18,430       31,269      42,677
  Net Investment in Working Capital    (12,617)     (12,839)    (11,408)

Schedule of Common Stock

  Beginning common stock              $317,179     $317,179    $317,179
  Shares issued                              -            -           -
  Price                                      -            -           -
  Discount                                 6.0%         6.0%        6.0%
  Net proceeds                               -            -           -
  Ending common stock                 $317,179     $317,179    $317,179

Schedule of Shares Outstanding

  Beginning shares outstanding          17,726       17,726      17,726
  Shares issued                              -            -           -
  Ending shares outstanding             17,726       17,726      17,726

<PAGE>

                                LEHMAN BROTHERS

          C

<PAGE>

Comparable Transactions Analysis
================================================================================
($ in millions except per share data)

<TABLE>
<CAPTION>
                                                                                               Total           Equity    
                                                                               Total          Equity         Value as a  
Transaction                                                                    Equity       Value Less      Multiple of: 
Announced/                                                                     Value         Net Cash           Book     
Completed               Acquiror/Acquiree                                      ($MM)           ($MM)            Value    
- ---------               -----------------                                      ------       ----------      ------------ 
<S>        <C>                                                                <C>             <C>               <C>    
- ------------------------------------------------------------------------------------------------------------------------
1/3/97     Hurdle (a)                                                         $  287.4        $  268.4          4.01 x 
Pending    Sprint                                                                                                      
           Cellular therapies for cancer patients                                                                      
- ------------------------------------------------------------------------------------------------------------------------
                                                                                                                       
11/11/97   Bergen Brunswig Corp. (b)                                          $1,670.9        $2,073.8          2.49   
Pending    IVAX Corp.                                                                                                  
           Generic drug distributor                                                                                    
                                                                                                                       
10/18/95   Rhone-Poulenc Rorer Inc. (c)                                       $  158.9        $  121.1          3.15 x 
11/28/95   Applied Immune Sciences Inc.                                                                                
           Single-use therapeutic devices that manipulate immune cells and proteins outside the body                     

7/10/95    Sandoz AG (d)                                                      $  293.7        $  237.5          4.81 x 
8/11/95    Genetic Therapy Inc.                                                                                        
           Insertion of genes into cells to product therapeutic proteins                                                 
                                                                                                                       
4/24/95    Chiron Corporation                                                 $  106.2        $   85.4          3.63 x 
10/3/95    Viagene, Inc.                                                                                               
           Gene transfer drugs for viral diseases and cancer                                                           
                                                                                                                       
2/7/95     Ligand Pharmaceuticals Inc. (e)                                    $   54.2        $   41.7          3.87 x 
5/19/95    Glycomed Inc.                                                                                               
           Pharmaceuticals based on complex carbohydrates                                                             
                                                                                                                       
11/21/94   CIBA-GEIGY Limited (f)                                             $3,443.5        $3,601.5          6.19 x 
1/3/95     Chiron Corp.                                                                                                
           Products for diagnosing, preventing and treating disease                                                      
                                                                                                                       
6/2/93     Rhone-Poulenc Rorer Inc. (g)                                       $  247.0        $  189.5          3.32 x 
9/21/93    Applied Immune Sciences Inc.                                                                                
           Cell therapy devices and services                                                                           
                                                                                                                       
12/15/92   American Cyanamid Company (h)                                      $  887.2        $  877.6          6.62 x 
5/25/93    Immunex Corporation                                                                                         
           Therapeutics for cancer, infectious and autoimmune diseases                                                   
                                                                                                                       
8/20/91    American Home Products Corp.                                       $1,089.9        $  677.8          2.16 x 
1/16/92    Genetics Institute, Inc.                                                                                    
           Protein-based pharmaceuticals for anemia, hemophilia, cancer, AIDS                                            

                                                                                     ** Excluded from statistics calculation. 
                                                                                     ---------------------------------
                                                                                     Mean:                      4.03 x  
                                                                                     Median:                    3.63   
                                                                                     High:                      6.62   
                                                                                     Low:                       2.16   
                                                                                     ---------------------------------


<CAPTION>
            Equity Value - Net Cash
               as a Multiple of:                                Implied            Premium to Stock Price                   Offer   
Transaction -----------------------    Equity       LTM       Remaining            Prior to Announcement                 Price Per  
Announced/                Assets       Value/     Burn Rate     Life     ----------------------------------------         Share At  
Completed   Revenue       - Cash      Net Cash      ($MM)      (Years)   One Day   One Month   LTM High   LTM Low       Announcement
- ---------  --------       ------      --------      -----      -------   -------   ---------   --------   -------       ------------
<S>          <C>          <C>         <C>          <C>           <C>      <C>        <C>         <C>       <C>             <C>      
- ------------------------------------------------------------------------------------------------------------------------------------
1/3/97       29.37 x      3.71 x      15.12 x      $ 30.5        0.8      29.5%      34.5%       4.7%      77.3%           $19.50   
Pending                                                                                                                             
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                    
11/11/97      1.74        1.55        -4.15        $ (2.4)      -6.2     -13.4%     -11.3%     -54.9%       5.8%           $13.76   
Pending                                                                                                                             
                                                                                                                                    
                                                                                                                                    
10/18/95     97.53 x**   34.54 x**     4.21 x      $ 23.9        1.6      67.9%      46.9%       1.9%     184.8%           $11.75   
11/28/95                                                                                                                            
                                                                                                                                    
                                                                                                                             
7/10/95      25.02 x**   20.19 x**     5.23 x      $ 10.3        6.0      37.7%      95.3%      37.7%     250.0%           $21.00   
8/11/95                                                                                                                             
                                                                                                                                    
                                                                                                                                    
4/24/95       6.62 x      7.36 x       5.11 x      $  8.9        3.3      67.4%      46.9%       5.1%     166.7%           $9.00    
10/3/95                                                                                                                             
                                                                                                                                    
                                                                                                                                    
2/7/95        6.31 x      6.14 x       4.34 x      $ 17.1        3.7      33.0%      41.4%     -41.5%     126.2%           $4.24    
5/19/95                                                                                                                             
                                                                                                                                    
                                                                                                                                    
11/21/94      8.72 x      4.35 x        NM            --         --       37.6%      32.1%     245.7%     533.8%           $82.20   
1/3/95                                                                                                                              
                                                                                                                                    
                                                                                                                                    
6/2/93      129.73 x*     9.58 x       0.24 x      $ 13.5        4.5      38.3%      75.2%      22.2%     133.6%           $26.28   
9/21/93                                                                                                                             
                                                                                                                                    
                                                                                                                                    
12/15/92     14.21 x      6.45 x       0.11 x      $  3.3       19.0      14.0%      -4.9%     -22.1%     112.5%           $51.00   
5/25/93                                                                                                                             
                                                                                                                                    
                                                                                                                                    
8/20/91       8.21 x      5.77 x       0.38 x         --         --       17.9%      23.3%     -36.8%      37.5%           $39.20   
1/16/92                                                                                                                             


             ---------------------------------------------------------------------------------------------------
              7.64 X      5.88 X       1.72 X        8.27       1.44      33.4%      38.3%      17.5%     172.3% 
              7.42        6.14         0.38          8.86       1.60      37.6%      41.4%       1.9%     133.6% 
             14.21        9.58         5.23         23.85       5.98      67.9%      95.3%     245.7%     533.8% 
              1.74        1.55        -4.15         -2.45      -6.16     -13.4%     -11.3%     -54.9%       5.8% 
             ---------------------------------------------------------------------------------------------------
</TABLE>
           
           
Transaction         Amount of
Announced/           Company                Form of
Completed            Acquired            Consideration
- ---------            --------            -------------
- ------------------------------------------------------
1/3/97     remaining 27%                     Cash
Pending    not already owned              
- ------------------------------------------------------
                                          
11/11/97   100%                              Stock
Pending                                   
                                          
                                          
10/18/95   remaining 53%                     Cash
11/28/95   not already owned              
                                          
                                 
7/10/95    remaining 96%                     Cash
8/11/95    not already owned              
                                          
                                          
4/24/95    remaining 83%                     Stock
10/3/95    not already owned              
                                          
                                          
2/7/95     100%                              Stock
5/19/95                                   
                                          
                                          
11/21/94   49.90%                         Cash/Stock
1/3/95     (option to raise stake         
           to 55% after five years)       
                                          
6/2/93     37%                               Cash
9/21/93    (option to increase            
           stake to 60%)                  
                                          
12/15/92   53.50%                         Cash + part
5/25/93                                   of business
                                          
                                          
8/20/91    60%                               Cash
1/16/92    (option to purchase         
           rest of company by 12/31/95)

- ----------
(a)  Amounts are excluded from statistical calculations.

(b)  Ivax had 4.012149 million option outstanding with an average exercise price
     of $18.43 that are all out of the money. The acquisition was for 0.42
     Bergen shares per Ivax share. All quarterly write offs are adjusted from
     LTM figures.

(c)  Rhone-Poulenc Rorer paid cash for the remaining 53% of AIS that it didn't
     already own for $11.75/share.

(d)  Sandoz paid cash for the remaining 96% of Genetic Therapy it did not own
     for $21.00/share.

(e)  Offer price per share calculated with 2/6/95 closing px of $8.00 and
     exchange ratio of 0.5301 shares of Ligand for 1 share of Glycomed. Shares
     outstanding and interim financial data from 2/7/95 news stories
     (Bloomberg).

(f)  Consideration per share taken as a weighted average of $117.00/sh for 37.3%
     of the outstanding shares and 1/4/95 closing price of $61.50 for the
     remaining 62.7% (which takes into account the 6.6mm shares issued to CIBA).

(g)  RPR acquired 37.2% of AIS for total proceeds of approx. $113mm. RPR has the
     option to purchase up to an additional 6mm shares of newly issued shares
     through 1/1/97 for a minimum total exercise price of $134mm.

(h)  ACY pruchased 53.5% of Immunex for $350mm + contribution of some of its
     North American Oncology Business. Transaction price based on 12/16/92
     close.
<PAGE>

                                LEHMAN BROTHERS

          D

<PAGE>

              Completed Biotechnology Initial Public Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                     
                                                                                                                     
                                                                                                                     
                                                                       Original    Original   Total(2)               
 Filing                                                                 Shares       File     Shares       Offer     
  Date       Issue Date           Issuer                     Ticker     Filed       Price     Offered      Price     
  ----       ----------           ------                     ------     -----       -----     -------      -----     
<S>            <C>          <C>                               <C>        <C>        <C>         <C>         <C>      
 11/7/94       1/25/95      Ostex International               OSTX       3.50       10.00       3.50        9.50     
  4/5/95        6/8/95      Oravax                            ORVX       2.60       13.00       2.30       10.00     
 5/16/95       6/14/95      Serologicals                      SERO       2.40       12.50       2.40       11.50     
 6/14/95       7/31/95      Sequana Therapeutics              SQNA       3.00       13.00       2.00        9.00     
 8/23/95       9/29/95      DepoTech Corporation              DEPO       2.50       11.00       3.00       12.00     
 8/17/95       10/5/95      Myriad Genetics                   MYGN       2.00       16.00       2.60       18.00     
 8/25/95      10/12/95      Sonus Pharmaceuticals             SNUS       2.50       11.00       2.85        7.00     
  9/1/95      10/18/95      Gliatech                          GLIA       2.30       11.00       2.30        9.50     
 8/21/95      10/23/95      Pharmacyclics                     PCYC       2.15       13.00       2.15       12.00     
 9/26/95       11/8/95      GelTex Pharmaceuticals            GELX       2.50       13.00       2.50       10.00     
 9/20/95      11/21/95      Pathogenesis                      PGNS       3.00       12.00       3.00       10.00     
10/17/95       12/5/95      Pharmacopeia                      PCOP       2.25       15.00       2.60       16.00     
10/16/95      12/14/95      Ergo Science Corporation          ERGO       2.50       11.00       2.50        9.00     
10/19/95      12/13/95      Synaptic Pharmaceutical           SNAP       2.00       13.00       2.00       12.50     
 11/6/95       1/24/96      Hybridon                          HYBN       5.00       10.00       5.00       10.00     
 12/8/95       1/31/96      Connective Therapeutics           CNCT       2.50       12.00       2.50       11.00     
12/11/95        2/1/96      Intercardia                       ITRC       2.20       13.00       2.20       15.00     
12/21/95       2/15/96      Neose Technologies                NTEC       2.25       13.50       2.25       12.50     
 1/11/96       2/28/96      Alexion Pharmaceuticals           ALXN       2.00        8.50       2.20        8.25     
 2/15/96       3/29/96      Houghten Pharmaceuticals          HPIP       3.00       12.00       3.30        8.00     
  3/6/96       4/11/96      Ribozyme Pharmaceuticals          RZYM       2.00       10.00       2.00       10.00     
 4/10/96        5/7/96      BioTransplant                     BTRN       2.50       10.00       2.80        9.50     
 4/10/96        5/7/96      Millennium Pharmaceuticals        MLNM       3.50       10.00       4.50       12.00     
 4/16/96        5/8/96      Onyx Pharmaceuticals              ONXX       2.50       12.00       2.50       12.00     
 4/12/96        5/9/96      SIBIA Neurosciences               SIBI       2.10       12.00       2.10       11.00     
 3/18/96       5/14/96      Microcide Pharmaceuticals         MCDE       2.50       14.00       2.50       14.00     
  4/4/96       5/21/96      Avigen                            AVGN       2.30        8.00       2.50        8.00     
  4/3/96       5/22/96      Neurocrine Biosciences            NBIX       3.00        9.00       3.50       10.50     
  4/8/96       5/29/96      Urologix                          ULGX       2.70       13.00       2.70       14.00     
 4/15/96        6/6/96      Affymetrix                        AFFX       5.00       12.00       6.00       15.00     
 4/22/96        6/6/96      Flamel Technologies              FLMLY       2.42       13.00       2.50       12.00     
 4/12/96       6/11/96      EntreMed                          ENMD       3.50       15.00       3.20       15.00     
 4/17/96       6/14/96      Andrx Corporation                 ADRX       1.70       12.00       2.20       12.00     
 4/17/96       6/20/96      Collagenex Pharmaceuticals        CGPI       2.15       14.00       2.00       10.00     
 5/30/96       6/27/96      QIAGEN N.V.                      QGENF       3.35       12.00       3.35       12.00     
 5/21/96       7/10/96      Maxim Pharmaceuticals              MMP       2.00        7.50       2.50        7.60     
 5/24/96       7/17/96      Cadus Pharmaceutical              KDUS       2.75       11.50       2.75        7.00     
 6/11/96       7/30/96      Geron Corp                        GERN       2.50       12.00       2.00        8.00     
 8/29/96      10/15/96      ArQule, Inc.                      ARQL       2.00       12.00       2.50       12.00     
 8/27/96      10/16/96      Transkaryotic Therapies           TKTX       2.50       14.00       2.50       15.00     
 6/25/96      10/25/96      Cubist Pharmaceuticals            CBST       2.50       12.00       2.50        6.00     
 9/11/96      10/31/96      Triangle Pharmaceuticals(3)       VIRS       4.00        8.50       4.20       10.00     
  6/5/96       11/5/96      Aviron                            AVIR       3.00       12.00       2.00        8.00     
 9/25/96      11/19/96      CV Therapeutics                   CVTX       2.50       13.00       1.75        8.00     


<CAPTION>
                                                               First 
                                                                Day  
                       Offer to     Offered       First       Closing       Current    Current     
                        Midpoint     Shares        Day        Price to       Stock      Price      
 Filing      Offer     of Filing    to Filed     Closing       Offer         Price     to File     
  Date       Amount      Range       Shares       Price        Price         1/3/97     Price      
  ----       ------      -----       ------       -----        -----         ------     -----      
<S>          <C>        <C>        <C>         <C>          <C>          <C>           <C>      
 11/7/94     33.25       -5.0%        0.0%        9.63         1.3%          5.50      -45.0%     
  4/5/95     23.00      -23.1%      -11.5%        9.13        -8.8%          5.38      -58.7%     
 5/16/95     27.60       -8.0%        0.0%       11.50         0.0%         31.75      154.0%     
 6/14/95     18.00      -30.8%      -33.3%       10.25        13.9%         16.00       23.1%     
 8/23/95     36.00        9.1%       20.0%       14.00        16.7%         15.88       44.3%     
 8/17/95     46.80       12.5%       30.0%       21.50        19.4%         24.25       51.6%     
 8/25/95     19.95      -36.4%       14.0%        6.88        -1.8%         30.50      177.3%     
  9/1/95     21.85      -13.6%        0.0%        9.50         0.0%          7.88      -28.4%     
 8/21/95     25.80       -7.7%        0.0%       12.00         0.0%         15.88       22.1%     
 9/26/95     25.00      -23.1%        0.0%       10.00         0.0%         23.00       76.9%     
 9/20/95     30.00      -16.7%        0.0%       10.00         0.0%         21.25       77.1%     
10/17/95     41.60        6.7%       15.6%       19.00        18.8%         19.38       29.2%     
10/16/95     22.50      -18.2%        0.0%       10.00        11.1%         12.75       15.9%     
10/19/95     25.00       -3.8%        0.0%       13.00         4.0%         12.75       -1.9%     
 11/6/95     50.00        0.0%        0.0%       10.50         5.0%          6.00      -40.0%     
 12/8/95     27.50       -8.3%        0.0%       11.25         2.3%          7.50      -37.5%     
12/11/95     33.00       15.4%        0.0%       20.75        38.3%         21.00       61.5%     
12/21/95     28.13       -7.4%        0.0%       13.38         7.0%         18.19       34.7%     
 1/11/96     18.15       -2.9%       10.0%        9.13        10.6%          8.75        2.9%     
 2/15/96     26.40      -33.3%       10.0%        9.25        15.6%          5.75      -52.1%     
  3/6/96     20.00        0.0%        0.0%       10.06         0.6%         11.06       10.6%     
 4/10/96     26.60       -5.0%       12.0%       10.25         7.9%          6.50      -35.0%     
 4/10/96     54.00       20.0%       28.6%       19.00        58.3%         18.13       81.3%     
 4/16/96     30.00        0.0%        0.0%       11.38        -5.2%         11.00       -8.3%     
 4/12/96     23.10       -8.3%        0.0%       10.88        -1.1%          7.50      -37.5%     
 3/18/96     35.00        0.0%        0.0%       18.50        32.1%         10.13      -27.7%     
  4/4/96     20.00        0.0%        8.7%       11.75        46.9%          4.50      -43.8%     
  4/3/96     36.75       16.7%       16.7%       12.50        19.0%          9.56        6.3%     
  4/8/96     37.80        7.7%        0.0%       15.25         8.9%         16.00       23.1%     
 4/15/96     90.00       25.0%       20.0%       17.38        15.8%         20.13       67.7%     
 4/22/96     30.00       -7.7%        3.3%       11.75        -2.1%          7.38      -43.3%     
 4/12/96     48.00        0.0%       -8.6%       15.75         5.0%         16.00        6.7%     
 4/17/96     26.40        0.0%       29.4%       17.00        41.7%         15.88       32.3%     
 4/17/96     20.00      -28.6%       -7.0%        9.13        -8.8%          8.25      -41.1%     
 5/30/96     40.20        0.0%        0.0%       15.13        26.0%         25.38      111.5%     
 5/21/96     19.00        1.3%       25.0%        9.88        29.9%          7.00       -6.7%     
 5/24/96     19.25      -39.1%        0.0%        7.00         0.0%          9.25      -19.6%     
 6/11/96     16.00      -33.3%      -20.0%        7.75        -3.1%         13.63       13.5%     
 8/29/96     30.00        0.0%       25.0%       13.25        10.4%         15.50       29.2%     
 8/27/96     37.50        7.1%        0.0%       15.00         0.0%         17.88       27.7%     
 6/25/96     15.00      -50.0%        0.0%        6.44         7.3%          6.00      -50.0%     
 9/11/96     42.00       17.6%        5.0%       10.94         9.4%         22.38      163.2%     
  6/5/96     16.00      -33.3%      -33.3%        8.00         0.0%          7.00      -41.7%     
 9/25/96     14.00      -38.5%      -30.0%        7.44        -7.0%          6.75      -48.1%     

</TABLE>
             
             
                                             Fully-Diluted
                             -----------------------------------------------
              Current              At IPO                     Current          
              Price to       -------------------        --------------------
 Filing        Offer         Market        Tech.        Market         Tech.
  Date         Price         Value         Value        Value          Value
  ----         -----         -----         -----        -----          -----
 11/7/94       -42.1%        128.80        90.26         76.93         49.47
  4/5/95       -46.3%         83.65        48.12         57.89         23.11
 5/16/95       176.1%         99.87        69.44        319.09        298.58
 6/14/95        77.8%         74.02        31.97        169.34        102.34
 8/23/95        32.3%        148.74       103.10        208.25        172.99
 8/17/95        34.7%        163.85        91.44        235.22        159.32
 8/25/95       335.7%         61.09        39.25        277.79        256.10
  9/1/95       -17.1%         71.97        45.36         61.23         40.34
 8/21/95        32.3%        103.76        75.30        142.65        117.29
 9/26/95       130.0%        112.16        78.44        335.60        248.52
 9/20/95       112.5%        118.66        66.12        315.89        233.21
10/17/95        21.1%        160.14       111.41        219.59        138.84
10/16/95        41.7%         92.65        68.46        172.66        159.12
10/19/95         2.0%         94.58        58.30         99.75         82.40
 11/6/95       -40.0%        359.04       288.15        222.72        185.16
 12/8/95       -31.8%         87.64        55.71         57.36         32.11
12/11/95        40.0%        106.19        74.19        155.62        118.15
12/21/95        45.5%        110.97        65.05        168.70        122.78
 1/11/96         6.1%         65.91        36.48         72.89         43.38
 2/15/96       -28.1%        108.58        74.57         81.09         47.30
  3/6/96        10.6%         72.33        30.41         85.75         70.46
 4/10/96       -31.6%         84.37        48.79         60.46         21.23
 4/10/96        51.0%        316.59       242.86        496.68        425.24
 4/16/96        -8.3%        118.10        77.65        112.76         69.65
 4/12/96       -31.8%        111.08        67.31         76.55         32.78
 3/18/96       -27.7%        155.51       107.34        116.77         65.06
  4/4/96       -43.8%         68.19        44.94         39.51         16.26
  4/3/96        -8.9%        212.11       129.32        194.93        112.14
  4/8/96        14.3%        131.71        93.13        157.26        118.67
 4/15/96        34.2%        369.52       248.38        500.76        383.81
 4/22/96       -38.5%        133.34       101.80         81.95         50.59
 4/12/96         6.7%        222.30       144.57        237.12        159.91
 4/17/96        32.3%        165.47       123.94        225.96        182.60
 4/17/96       -17.5%         78.03        54.62         64.40         42.74
 5/30/96       111.5%        198.05       165.72        418.79        386.02
 5/21/96        -7.9%         69.56        22.55         66.69         37.38
 5/24/96        32.1%         90.46        45.59        123.47         78.60
 6/11/96        70.3%        139.89        65.32        238.30        179.43
 8/29/96        29.2%        127.35        90.46        164.48        127.60
 8/27/96        19.2%        274.63       177.15        327.26        229.78
 6/25/96         0.0%         58.57        39.24         60.82         41.49
 9/11/96       123.8%        184.77       126.77        413.43        355.42
  6/5/96       -12.5%         95.91        68.45         83.92         56.46
 9/25/96       -15.6%         59.66        25.58         13.86        -20.22


<PAGE>

              Completed Biotechnology Initial Public Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                       Original    Original   Total(2)                         
 Filing                                                                 Shares       File     Shares       Offer       
  Date       Issue Date           Issuer                     Ticker     Filed       Price     Offered      Price       
  ----       ----------           ------                     ------     -----       -----     -------      -----       
<S>            <C>          <C>                               <C>        <C>        <C>         <C>         <C>        
 9/20/96      11/19/96      ViroPharma                        VPHM       2.25       12.00       2.25        7.00       
  9/9/96      12/20/96      Genetic Vectors                   GVEC       0.40       10.00       0.50       10.00       


<CAPTION>
                                                             First  
                                                              Day   
                      Offer to     Offered       First      Closing       Current    Current     
                      Midpoint     Shares        Day        Price to       Stock      Price      
 Filing      Offer   of Filing    to Filed     Closing       Offer         Price     to File     
  Date       Amount    Range       Shares       Price        Price         1/3/97     Price      
  ----       ------    -----       ------       -----        -----         ------     -----      
<S>          <C>      <C>         <C>          <C>          <C>           <C>        <C>       
 9/20/96     15.75    -41.7%        0.0%        7.00         0.0%          9.88      -17.7%     
  9/9/96      5.00      0.0%       25.0%       18.00        80.0%          #N/A       #N/A      


                   Completed 1995 Offerings
                 ------------------------------------------------------------------------------
         Mean         -11.3%        2.5%                     5.3%                     38.4%    
         Median       -10.8%        0.0%                     0.7%                     26.1%    
         High          12.5%       30.0%                    19.4%                    177.3%    
         Low          -36.4%      -33.3%                    -8.8%                    -58.7%    
                 ------------------------------------------------------------------------------
                   Completed 1996 Offerings
                 ------------------------------------------------------------------------------
          Mean          -7.1%       3.7%                    14.1%                      3.9%    
          Median         0.0%       0.0%                     7.6%                     -6.7%    
          High          25.0%      29.4%                    80.0%                    163.2%    
          Low          -50.0%     -33.3%                    -8.8%                    -52.1%    
                 ------------------------------------------------------------------------------

</TABLE>


                                             Fully-Diluted
                             -----------------------------------------------
              Current               At IPO                    Current          
              Price to       -------------------        --------------------
 Filing        Offer         Market        Tech.        Market         Tech.
  Date         Price         Value         Value        Value          Value
  ----         -----         -----         -----        -----          -----
 9/20/96        41.1%         64.94        42.13         91.61         68.80
  9/9/96        #N/A          92.77        69.96          #N/A          #N/A


               -------------------------------------------------------------
                63.6%       $108.14      $ 69.78       $192.28       $148.69
                33.5%       $101.82      $ 68.95       $190.45       $148.98
               335.7%       $163.85      $111.41       $335.60       $298.58
               -46.3%       $ 61.09      $ 31.97       $ 57.89       $ 23.11
               -------------------------------------------------------------

               -------------------------------------------------------------
                10.4%       $141.67      $ 95.25       $168.12       $123.90
                 6.1%       $111.02      $ 72.08       $116.77       $ 70.46
               123.8%       $369.52      $288.15       $500.76       $425.24
               -43.8%       $ 58.57      $ 22.55       $ 13.86       $(20.22)
               -------------------------------------------------------------


- ----------
(1)  Excludes unit offerings and shelf-registrations.

(2)  Excludes over-allotment option.

(3)  Offered shares include 800,000 shares offered outside the U.S. and Canada
     on 11/1/96.

<PAGE>

         Completed Biotechnology Public Equity Follow-On Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                          
                                                                         Original                   Total                 
 Filing                                                                   Shares     Original      Shares       Offer     
  Date       Issue Date              Issuer                   Ticker      Filed     File Price     Offered      Price     
  ----       ----------              ------                   ------      -----     ----------     -------      -----     
<S>            <C>          <C>                                <C>         <C>          <C>         <C>          <C>      
 2/14/95       3/17/95      Inhale Therapeutic Systems         INHL        2.00         9.50        1.00         8.00     
 3/16/95       4/20/95      Vivus                              VVUS        2.10        15.75        1.80        14.50     
 3/21/95       4/27/95      The Liposome Company               LIPO        3.00        11.13        3.00         9.00     
  3/3/95       5/12/95      Orphan Medical                     ORPH        1.50         3.63        2.23         4.00     
 4/14/95       6/15/95      La Jolla Pharmaceuticals (2)       LJPC        3.00         3.69        3.40         3.94     
 6/27/95        8/1/95      Cephalon                           CEPH        2.50        17.75        3.00        22.50     
  6/9/95        8/1/95      Sepracor                           SEPR        3.00        12.50        4.00        14.50     
 7/19/95       8/10/95      Northfield Laboratories            NFLD        2.50        14.38        2.93        17.75     
 8/24/95        9/7/95      Interferon Sciences Inc. (2)       IFSC       12.00         1.20       12.00         1.20     
 7/14/95       8/16/95      Guilford Pharmaceuticals (2)       GLFD        1.80         7.75        3.00         6.50     
  8/4/95       8/16/95      Magainin Pharmaceuticals (2)       MAGN        2.00         7.88        3.50        10.00     
 7/14/95       8/17/95      Gilead Sciences                    GILD        2.50        20.50        4.05        23.25     
  7/7/95       8/17/95      Neurogen Corp.                     NRGN        2.50        15.44        2.50        16.00     
 7/28/95       8/18/95      AutoImmune                         AIMM        3.00        11.88        3.50        16.00     
 8/16/95       8/24/95      ImmuLogic Pharmaceutical (3)       IMUL        1.00        10.50        1.00        10.00     
 8/29/95       9/13/95      ImmuLogicPharmaceutical            IMUL        2.00        11.13        2.40        10.75     
  8/4/95       9/15/95      Agouron Pharmaceuticals            AGPH        2.00        28.5         3.00        28.00     
 8/15/95       9/20/95      Alkermes Inc.                      ALKS        2.00         7.25        2.00         7.00     
 8/15/95       9/21/95      Vical                              VICL        2.50        11.88        2.50        12.25     
  9/1/95       9/22/95      Amylin Pharmaceutical              AMLN        2.50         7.88        2.50         8.13     
 8/17/95       9/22/95      Genzyme Tissue Repair              GENZL       3.00        14.75        3.00        15.00     
  8/9/95       9/22/95      HemaSure                           HMSR        2.50        11.38        2.50        18.50     
  9/1/95       9/27/95      Martek Biosciences                 MATK        2.00        14.50        2.50        15.00     
 8/25/95       9/29/95      Human Genome Sciences              HGSI        2.50        26.50        2.75        21.50     
 9/26/95       9/29/95      CytoTherapeutics (2)               CTII        1.50         9.88        2.30         9.38     
 8/24/95       10/5/95      Isis Pharmaceuticals               ISIP        3.00        13.13        2.50        10.00     
 9/14/95       10/6/95      Cygnus Inc.                        CYGN        2.00        18.63        2.00        14.00     
 9/15/95      10/12/95      Neurex Corporation (2)             NXCO        3.00         6.75        3.00         4.50     
 9/14/95      10/13/95      Genzyme Corporation                GENZ        2.50        60.00        2.50        51.25     
 9/18/95      10/13/95      Somatogen Inc.                     SMTG        2.50        24.00        1.40        18.00     
  9/5/95      10/17/95      Matrix Pharmaceutical              MATX        3.00        14.25        3.60        13.25     
 9/13/95      10/18/95      Alteon Inc.                        ALTN        2.50        12.63        2.00         9.00     
 9/27/95      10/25/95      Sequus                             SEQU        3.00        11.75        3.90        11.00     
 9/25/95      10/27/95      GeneMedicine, Inc.                 GMED        3.00         9.50        3.00         6.50     
10/12/95       11/9/95      Incyte Pharmaceuticals             INCY        1.50        21.00        1.70        19.00     
 9/26/95       11/9/95      Regeneron                          REGN        3.00        14.88        2.30        10.50     
12/22/95       1/24/96      CoCensys Inc. (2)                  COCN        2.00         8.38        2.43         6.50     
10/27/95       1/30/96      Integra Lifesciences Corp.         IART        4.00         7.63        4.48         8.25     
 1/18/96        2/9/96      Procept Inc.                       PRCT        2.20         3.13        2.20         2.50     
  1/3/96       2/14/96      MedImmune Inc.                     MEDI        2.00        18.75        3.45        18.00     
 1/10/96       2/16/96      Genome Therapeutics Corp.          GENE        2.00         8.50        3.00        13.00     
 1/23/96       2/16/96      Gilead Sciences Inc.               GILD        3.50        38.50        4.00        37.75     
  2/6/96       2/23/96      BioChem Pharma Inc.                BCHXF       3.00        43.69        3.50        45.50     
 2/12/96        3/7/96      Sequana Therapeutics               SQNA        1.50        23.25        1.70        19.00     
 1/29/96        3/8/96      Alpha-Beta Technology Inc.         ABTI        2.00        14.88        3.00        14.00     
  2/9/96        3/8/96      SangStat Medical Corporation       SANG        2.00        14.13        3.45        14.00     
 2/14/96       3/14/96      Oncogene Science Inc.              ONCS        2.50         8.63        2.83         9.13     
 1/22/96       3/15/96      Centocor Inc.                      CNTO        3.50        28.50        4.03        33.00     
 2/23/96       3/21/96      Advanced Tissue Sciences, Inc.     ATIS        3.00        10.31        3.00        13.25     


<CAPTION>
                                                                  First Day                                             
                                       Offered                     Closing     Current                                  
                           Offer      Shares to     First Day     Price to      Stock       Current       Current       
 Filing       Offer       Price to      Filed        Closing      Price to      Price       Price to      Price to      
  Date       Amount      File Price     Shares        Price      Offer Price   1/3/97      File Price   Offer Price     
  ----       ------      ----------     ------        -----      -----------   ------      ----------   -----------     
<S>            <C>          <C>          <C>           <C>          <C>        <C>           <C>           <C>          
 2/14/95       8.00        -15.8%       -50.0%         7.88         -1.6%       15.25         60.5%         90.6%       
 3/16/95      26.10         -7.9%       -14.3%        14.06         -3.0%       39.00        147.6%        169.0%       
 3/21/95      27.00        -19.1%         0.0%         9.00          0.0%       18.50         66.3%        105.6%       
  3/3/95       8.90         10.3%        48.3%         4.19          4.7%        9.63        165.5%        140.6%       
 4/14/95      13.39          6.8%        13.3%         3.75         -4.8%        5.75         55.9%         46.0%       
 6/27/95      67.50         26.8%        20.0%        23.50          4.4%       21.06         18.7%         -6.4%       
  6/9/95      58.00         16.0%        33.3%        15.06          3.9%       16.50         32.0%         13.8%       
 7/19/95      51.92         23.5%        17.0%        18.25          2.8%       11.50        -20.0%        -35.2%       
 8/24/95      14.40          0.0%         0.0%         2.50        108.3%        1.69         40.6%         40.6%       
 7/14/95      19.50        -16.1%        66.7%         8.75         34.6%       21.50        177.4%        230.8%       
  8/4/95      35.00         27.0%        75.0%        10.25          2.5%        9.25         17.5%         -7.5%       
 7/14/95      94.25         13.4%        62.2%        23.50          1.1%       24.50         19.5%          5.4%       
  7/7/95      40.00          3.6%         0.0%        16.50          3.1%       19.63         27.1%         22.7%       
 7/28/95      56.00         34.7%        16.7%        16.13          0.8%       15.75         32.6%         -1.6%       
 8/16/95      10.00         -4.8%         0.0%        10.63          6.3%        6.13        -41.7%        -38.8%       
 8/29/95      25.80         -3.4%        20.0%        11.38          5.8%        6.13        -44.9%        -43.0%       
  8/4/95      84.00         -1.8%        50.0%        28.00          0.0%       68.25        139.5%        143.8%       
 8/15/95      14.00         -3.4%         0.0%         6.88         -1.8%       22.38        208.6%        219.6%       
 8/15/95      30.63          3.2%         0.0%        13.25          8.2%       16.75         41.1%         36.7%       
  9/1/95      20.31          3.2%         0.0%         7.75         -4.6%       12.50         58.7%         53.8%       
 8/17/95      45.00          1.7%         0.0%        15.13          0.8%        7.25        -50.8%        -51.7%       
  8/9/95      46.25         62.6%         0.0%        18.38         -0.7%        6.63        -41.8%        -64.2%       
  9/1/95      37.50          3.4%        25.0%        15.25          1.7%       20.25         39.7%         35.0%       
 8/25/95      59.13        -18.9%        10.0%        21.75          1.2%       41.00         54.7%         90.7%       
 9/26/95      21.57         -5.0%        53.3%         9.75          3.9%        9.50         -3.8%          1.3%       
 8/24/95      25.00        -23.8%       -16.7%        10.31          3.1%       18.00         37.1%         80.0%       
 9/14/95      28.00        -24.8%         0.0%        14.88          6.3%       15.00        -19.5%          7.1%       
 9/15/95      13.50        -33.3%         0.0%         6.00         33.3%       16.50        144.4%        266.7%       
 9/14/95     128.13        -14.6%         0.0%        52.63          2.7%       23.13        -61.5%        -54.9%       
 9/18/95      25.20        -25.0%       -44.0%        17.75         -1.4%       11.63        -51.6%        -35.4%       
  9/5/95      47.70         -7.0%        20.0%        13.50          1.9%        6.13        -57.0%        -53.8%       
 9/13/95      18.00        -28.7%       -20.0%        10.00         11.1%        5.50        -56.4%        -38.9%       
 9/27/95      42.90         -6.4%        30.0%        11.63          5.7%       16.13         37.2%         46.6%       
 9/25/95      19.50        -31.6%         0.0%         6.56          1.0%        6.19        -34.9%         -4.8%       
10/12/95      32.30         -9.5%        13.3%        18.25         -3.9%       51.00        142.9%        168.4%       
 9/26/95      24.15        -29.4%       -23.3%        10.25         -2.4%       17.13         15.1%         63.1%       
12/22/95      15.80        -22.4%        21.5%         6.81          4.8%        6.56        -21.6%          1.0%       
10/27/95      36.92          8.2%        11.9%         9.63         16.7%        4.63        -39.3%        -43.9%       
 1/18/96       5.50        -20.0%         0.0%         2.88         15.0%        1.13        -64.0%        -55.0%       
  1/3/96      62.10         -4.0%        72.5%        19.75          9.7%       16.69        -11.0%         -7.3%       
 1/10/96      39.00         52.9%        50.0%        14.88         14.4%       10.88         27.9%        -16.3%       
 1/23/96     151.00         -1.9%        14.3%        37.75          0.0%       24.50        -36.4%        -35.1%       
  2/6/96     159.25          4.1%        16.7%        46.63          2.5%       49.63         13.6%          9.1%       
 2/12/96      32.30        -18.3%        13.3%        19.00          0.0%       16.00        -31.2%        -15.8%       
 1/29/96      42.00         -5.9%        50.0%        13.75         -1.8%       10.50        -29.4%        -25.0%       
  2/9/96      48.30         -0.9%        72.5%        15.63         11.6%       28.00         98.2%        100.0%       
 2/14/96      25.78          5.7%        13.0%         9.88          8.2%        6.38        -26.1%        -30.1%       
 1/22/96     132.83         15.8%        15.0%        34.63          4.9%       34.63         21.5%          4.9%       
 2/23/96      39.75         28.5%         0.0%        12.81         -3.3%       10.88          5.5%        -17.9%       
</TABLE>


             Current      Current       
 Filing      Market        Tech.        
  Date        Value        Value        
  ----        -----        -----        
 2/14/95      180.27      145.98        
 3/16/95      631.41      577.51        
 3/21/95      677.10      635.38        
  3/3/95       58.14       37.65        
 4/14/95       93.51       76.38        
 6/27/95      516.39      361.19        
  6/9/95      449.56      327.46        
 7/19/95      160.71      100.88        
 8/24/95       72.57       60.27        
 7/14/95      300.53      237.89        
  8/4/95      179.05      146.40        
 7/14/95      699.70      409.30        
  7/7/95      278.91      184.49        
 7/28/95      257.45      187.00        
 8/16/95      123.87       41.28        
 8/29/95      123.87       41.28        
  8/4/95      921.38      830.50        
 8/15/95      413.31      364.66        
 8/15/95      257.72      207.70        
  9/1/95      392.50      352.95        
 8/17/95       93.65       57.67        
  8/9/95       53.59       17.31        
  9/1/95      271.01      228.57        
 8/25/95      766.82      648.76        
 9/26/95      146.58      108.16        
 8/24/95      462.67      394.10        
 9/14/95      279.42      233.27        
 9/15/95      363.46      336.14        
 9/14/95     1661.65     1379.25        
 9/18/95      240.75      170.38        
  9/5/95      130.18       74.78        
 9/13/95       86.37       45.01        
 9/27/95      471.17      428.72        
 9/25/95       80.41       45.87        
10/12/95      523.62      486.10        
 9/26/95      439.19      364.25        
12/22/95      144.47      113.96        
10/27/95      132.05       98.47        
 1/18/96       15.39        4.34        
  1/3/96      361.40      280.33        
 1/10/96      190.35      156.33        
 1/23/96      699.70      409.30        
  2/6/96     2619.36     2619.06        
 2/12/96      161.30       97.54        
 1/29/96      175.58      121.44        
  2/9/96      366.97      329.52        
 2/14/96      139.54       90.20        
 1/22/96     2393.35     2232.95        
 2/23/96      407.48      351.84        

<PAGE>

         Completed Biotechnology Public Equity Follow-On Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                          
                                                                         Original                   Total                 
 Filing                                                                   Shares     Original      Shares       Offer     
  Date       Issue Date              Issuer                   Ticker      Filed     File Price     Offered      Price     
  ----       ----------              ------                   ------      -----     ----------     -------      -----     
<S>            <C>          <C>                                <C>         <C>          <C>         <C>          <C>      
  2/6/96       3/22/96      Arris Pharmaceuticals              ARRS        3.00        15.38        3.00        13.00     
 2/20/96       3/22/96      Guilford Pharmaceuticals           GLFD        2.00        21.50        2.00        20.00     
  3/1/96        4/1/96      Matrix Pharmaceuticals             MATX        2.50        23.38        2.75        22.63     
  3/7/96        4/2/96      Alliance Pharmaceuticals           ALLP        2.50        17.25        2.50        16.50     
 3/11/96        4/2/96      NeoProbe Corp.                     NEOP        1.75        20.69        1.75        18.50     
  4/4/96       4/30/96      Fuisz Technologies                 FUSE        3.00        27.00        3.90        25.00     
  4/9/96        5/1/96      Neurex Corp.                       NXCO        3.00        16.75        3.00        22.75     
  4/3/96        5/1/96      Pathogenesis Corp.                 PGNS        2.00        13.50        2.50        16.25     
 3/29/96        5/2/96      GelTex Pharmaceuticals             GELX        2.00        22.50        2.50        22.75     
  4/5/96        5/3/96      Atrix Laboratories Inc.            ATRX        2.50        11.38        2.25        11.63     
 3/29/96        5/3/96      Life Medical Sciences              CHAI        2.00         6.75        2.00         6.63     
 3/20/96        5/3/96      NPS Pharmaceuticals                NPSP        2.00        12.25        3.00        16.00     
  4/9/96        5/8/96      Icos Corp.                         ICOS        6.00         8.75        6.00         7.63     
 4/11/96       5/16/96      Aronex Pharmaceuticals Inc.        ARNX        6.00         5.06        6.00         5.00     
 4/10/96       5/23/96      Molecular Biosystems Inc.          MB          3.00         9.13        3.60         9.00     
 4/10/96       5/30/96      Biosource International Inc.       BIOI        2.15         6.19        2.50         9.25     
  5/3/96        6/3/96      Interneuron Pharmaceuticals        IPIC        2.50        41.75        3.00        39.00     
  5/3/96        6/6/96      IDEC Pharmaceuticals Corp.         IDPH        1.50        27.13        1.80        24.00     
 4/16/96       6/20/96      Targeted Genetics Corporation      TGEN        3.50         5.13        3.50         4.00     
  4/1/96       6/26/96      Oravax                             ORVX        2.50        13.50        2.00         7.25     
 5/26/96        7/2/96      La Jolla Pharmaceutical            LJPC        3.00         7.00        2.00         5.38     
 6/10/96        7/3/96      Creative Biomolecules              CBMI        2.00         7.31        2.00         7.00     
 6/21/96       7/25/96      Agouron Pharmaceuticals            AGPH        2.50        39.25        2.50        30.00     
 6/12/96       7/30/96      Genzyme Transgenics                GZTC        3.00         8.13        3.00         4.00     
  7/3/96        8/8/96      Vertex Pharmaceuticals             VRTX        3.00        33.00        3.00        24.00     
 6/28/96        8/9/96      Anergen, Inc.                      ANRG        4.00         4.63        3.50         3.00     
 7/18/96        8/9/96      Ergo Science                       ERGO        2.50        16.75        2.50        12.25     
 7/23/96       8/26/96      T Cell Sciences                    TCEL        5.00         2.94        5.00         2.19     
 6/28/96       9/25/96      BioCryst Pharmaceuticals           BCRX        2.00        17.00        2.00        10.00     
 9/25/96      10/24/96      Ligand Pharmaceuticals             LGND        2.75        14.75        2.75        12.00     
10/15/96      10/25/96      SUGEN                              SUGN        2.00        13.88        2.00        12.00     
  6/6/96      10/28/96      Immune Response                    IMNR        2.50        12.38        2.20         6.50     
10/15/96       11/1/96      Amylin Pharmaceuticals             AMLN        1.50        13.00        1.75        10.00     


<CAPTION>
                                                                  First Day                                          
                                       Offered                     Closing     Current                               
                           Offer      Shares to     First Day     Price to      Stock       Current       Current       
 Filing       Offer       Price to      Filed        Closing      Price to      Price       Price to      Price to      
  Date       Amount      File Price     Shares        Price      Offer Price   1/3/97      File Price   Offer Price     
  ----       ------      ----------     ------        -----      -----------   ------      ----------   -----------     
<S>            <C>          <C>          <C>           <C>          <C>        <C>           <C>           <C>          
  2/6/96      39.00        -15.5%         0.0%        12.88         -1.0%       13.88         -9.8%          6.7%       
 2/20/96      40.00         -7.0%         0.0%        20.13          0.6%       21.50          0.0%          7.5%       
  3/1/96      62.22         -3.2%        10.0%        22.88          1.1%        6.13        -73.8%        -72.9%       
  3/7/96      41.25         -4.3%         0.0%        17.25          4.5%       15.38        -10.9%         -6.8%       
 3/11/96      32.38        -10.6%         0.0%        18.88          2.0%       15.13        -26.9%        -18.2%       
  4/4/96      97.50         -7.4%        30.0%        25.50          2.0%        8.00        -70.4%        -68.0%       
  4/9/96      68.25         35.8%         0.0%        27.88         22.5%       16.50         -1.5%        -27.5%       
  4/3/96      40.63         20.4%        25.0%        18.25         12.3%       21.25         57.4%         30.8%       
 3/29/96      56.88          1.1%        25.0%        22.75          0.0%       23.00          2.2%          1.1%       
  4/5/96      26.16          2.2%       -10.0%        11.75          1.1%       10.88         -4.4%         -6.5%       
 3/29/96      13.25         -1.9%         0.0%         8.00         20.8%        6.63         -1.9%          0.0%       
 3/20/96      48.00         30.6%        50.0%        16.25          1.6%       11.75         -4.1%        -26.6%       
  4/9/96      45.75        -12.9%         0.0%         7.88          3.3%        7.63        -12.9%          0.0%       
 4/11/96      30.00         -1.2%         0.0%         5.06          1.3%        8.88         75.4%         77.5%       
 4/10/96      32.40         -1.4%        20.0%        10.00         11.1%        7.00        -23.3%        -22.2%       
 4/10/96      23.13         49.4%        16.3%        10.13          9.5%        6.63          7.0%        -28.4%       
  5/3/96     117.00         -6.6%        20.0%        38.38         -1.6%       26.25        -37.1%        -32.7%       
  5/3/96      43.20        -11.5%        20.0%        23.88         -0.5%       22.50        -17.1%         -6.3%       
 4/16/96      14.00        -22.0%         0.0%         4.06          1.6%        4.38        -14.6%          9.4%       
  4/1/96      14.50        -46.3%       -20.0%         7.75          6.9%        5.38        -60.2%        -25.9%       
 5/26/96      10.75        -23.2%       -33.3%         5.50          2.3%        5.75        -17.9%          7.0%       
 6/10/96      14.00         -4.2%         0.0%         7.09          1.3%       10.13         38.5%         44.6%       
 6/21/96      75.00        -23.6%         0.0%        30.50          1.7%       68.25         73.9%        127.5%       
 6/12/96      12.00        -50.8%         0.0%         4.06          1.6%        6.25        -23.1%         56.3%       
  7/3/96      72.00        -27.3%         0.0%        24.44          1.8%       38.25         15.9%         59.4%       
 6/28/96      10.50        -35.2%       -12.5%         3.25          8.3%        3.75        -19.0%         25.0%       
 7/18/96      30.63        -26.9%         0.0%        12.44          1.6%       12.75        -23.9%          4.1%       
 7/23/96      10.94        -25.5%         0.0%         2.38          8.5%        1.63        -44.7%        -25.7%       
 6/28/96      20.00        -41.2%         0.0%        12.88         28.8%       15.75         -7.4%         57.5%       
 9/25/96      33.00        -18.6%         0.0%        12.50          4.2%       15.34          4.0%         27.9%       
10/15/96      24.00        -13.5%         0.0%        11.88         -1.0%       12.88         -7.2%          7.3%       
  6/6/96      14.30        -47.5%       -12.0%         6.88          5.8%        8.25        -33.3%         26.9%       
10/15/96      17.50        -23.1%        16.7%        10.75          7.5%       12.50         -3.8%         25.0%       

                      Completed 1995 Offerings
                   ----------------------------------------------------------------------------------------------
           Mean             -2.6%        11.3%                       6.5%                     36.0%         45.6%
           Median           -4.1%         0.0%                       2.2%                     32.3%         28.8%
           High             62.6%        75.0%                     108.3%                    208.6%        266.7%
           Low             -33.3%       -50.0%                      -4.8%                    -61.5%        -64.2%
                   ----------------------------------------------------------------------------------------------
                      Completed 1996 Offerings
                   ----------------------------------------------------------------------------------------------
           Mean             -7.2%        10.8%                       5.5%                     -8.0%          2.2%
           Median           -6.8%         0.0%                       2.4%                    -10.9%          0.0%
           High             52.9%        72.5%                      28.8%                     98.2%        127.5%
           Low             -50.8%       -33.3%                      -3.3%                    -73.8%        -72.9%
                   ----------------------------------------------------------------------------------------------
</TABLE>


             Current      Current       
 Filing      Market        Tech.        
  Date        Value        Value        
  ----        -----        -----        
  2/6/96      198.07      148.23        
 2/20/96      300.53      284.47        
  3/1/96      130.18       74.78        
  3/7/96      462.30      390.89        
 3/11/96      310.64      267.71        
  4/4/96      162.87       94.21        
  4/9/96      363.46      338.75        
  4/3/96      295.31      223.70        
 3/29/96      310.57      223.84        
  4/5/96      120.66       86.25        
 3/29/96       52.44       36.76        
 3/20/96      138.66       67.44        
  4/9/96      300.49      245.60        
 4/11/96      129.19       88.03        
 4/10/96      122.96       73.66        
 4/10/96       55.08       41.09        
  5/3/96     1076.72      904.13        
  5/3/96      405.36      322.50        
 4/16/96       88.03       63.59        
  4/1/96       53.52       20.18        
 5/26/96       93.51       66.58        
 6/10/96      315.38      285.21        
 6/21/96      921.38       13.17        
 6/12/96      106.71       94.00        
  7/3/96      805.70      667.68        
 6/28/96       70.26       51.11        
 7/18/96      165.95      124.50        
 7/23/96       40.57       23.72        
 6/28/96      215.60      172.24        
 9/25/96      436.93      345.84        
10/15/96      166.20      104.26        
  6/6/96      166.49      115.80        
10/15/96      392.50      314.70        

- ----------
(1)  Excludes unit offerings and shelf-registrations.

(2)  Issue sold on best efforts basis.

(3)  Public offering sold to one investor, Amerindo Investment Advisors.


<PAGE>

         Completed Biotechnology Public Equity Follow-On Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                          
                                                                         Original                   Total                 
 Filing                                                                   Shares     Original      Shares       Offer     
  Date       Issue Date              Issuer                   Ticker      Filed     File Price     Offered      Price     
  ----       ----------              ------                   ------      -----     ----------     -------      -----     
<S>            <C>          <C>                                <C>         <C>          <C>         <C>          <C>      
 2/14/95       3/17/95      Inhale Therapeutic Systems         INHL        2.00         9.50        1.00         8.00     
 3/16/95       4/20/95      Vivus                              VVUS        2.10        15.75        1.80        14.50     
 3/21/95       4/27/95      The Liposome Company               LIPO        3.00        11.13        3.00         9.00     
  3/3/95       5/12/95      Orphan Medical                     ORPH        1.50         3.63        2.23         4.00     
 4/14/95       6/15/95      La Jolla Pharmaceuticals (2)       LJPC        3.00         3.69        3.40         3.94     
 6/27/95        8/1/95      Cephalon                           CEPH        2.50        17.75        3.00        22.50     
  6/9/95        8/1/95      Sepracor                           SEPR        3.00        12.50        4.00        14.50     
 7/19/95       8/10/95      Northfield Laboratories            NFLD        2.50        14.38        2.93        17.75     
 8/24/95        9/7/95      Interferon Sciences Inc. (2)       IFSC       12.00         1.20       12.00         1.20     
 7/14/95       8/16/95      Guilford Pharmaceuticals (2)       GLFD        1.80         7.75        3.00         6.50     
  8/4/95       8/16/95      Magainin Pharmaceuticals (2)       MAGN        2.00         7.88        3.50        10.00     
 7/14/95       8/17/95      Gilead Sciences                    GILD        2.50        20.50        4.05        23.25     
  7/7/95       8/17/95      Neurogen Corp.                     NRGN        2.50        15.44        2.50        16.00     
 7/28/95       8/18/95      AutoImmune                         AIMM        3.00        11.88        3.50        16.00     
 8/16/95       8/24/95      ImmuLogic Pharmaceutical (3)       IMUL        1.00        10.50        1.00        10.00     
 8/29/95       9/13/95      ImmuLogicPharmaceutical            IMUL        2.00        11.13        2.40        10.75     
  8/4/95       9/15/95      Agouron Pharmaceuticals            AGPH        2.00        28.5         3.00        28.00     
 8/15/95       9/20/95      Alkermes Inc.                      ALKS        2.00         7.25        2.00         7.00     
 8/15/95       9/21/95      Vical                              VICL        2.50        11.88        2.50        12.25     
  9/1/95       9/22/95      Amylin Pharmaceutical              AMLN        2.50         7.88        2.50         8.13     
 8/17/95       9/22/95      Genzyme Tissue Repair              GENZL       3.00        14.75        3.00        15.00     
  8/9/95       9/22/95      HemaSure                           HMSR        2.50        11.38        2.50        18.50     
  9/1/95       9/27/95      Martek Biosciences                 MATK        2.00        14.50        2.50        15.00     
 8/25/95       9/29/95      Human Genome Sciences              HGSI        2.50        26.50        2.75        21.50     
 9/26/95       9/29/95      CytoTherapeutics (2)               CTII        1.50         9.88        2.30         9.38     
 8/24/95       10/5/95      Isis Pharmaceuticals               ISIP        3.00        13.13        2.50        10.00     
 9/14/95       10/6/95      Cygnus Inc.                        CYGN        2.00        18.63        2.00        14.00     
 9/15/95      10/12/95      Neurex Corporation (2)             NXCO        3.00         6.75        3.00         4.50     
 9/14/95      10/13/95      Genzyme Corporation                GENZ        2.50        60.00        2.50        51.25     
 9/18/95      10/13/95      Somatogen Inc.                     SMTG        2.50        24.00        1.40        18.00     
  9/5/95      10/17/95      Matrix Pharmaceutical              MATX        3.00        14.25        3.60        13.25     
 9/13/95      10/18/95      Alteon Inc.                        ALTN        2.50        12.63        2.00         9.00     
 9/27/95      10/25/95      Sequus                             SEQU        3.00        11.75        3.90        11.00     
 9/25/95      10/27/95      GeneMedicine, Inc.                 GMED        3.00         9.50        3.00         6.50     
10/12/95       11/9/95      Incyte Pharmaceuticals             INCY        1.50        21.00        1.70        19.00     
 9/26/95       11/9/95      Regeneron                          REGN        3.00        14.88        2.30        10.50     
12/22/95       1/24/96      CoCensys Inc. (2)                  COCN        2.00         8.38        2.43         6.50     
10/27/95       1/30/96      Integra Lifesciences Corp.         IART        4.00         7.63        4.48         8.25     
 1/18/96        2/9/96      Procept Inc.                       PRCT        2.20         3.13        2.20         2.50     
  1/3/96       2/14/96      MedImmune Inc.                     MEDI        2.00        18.75        3.45        18.00     
 1/10/96       2/16/96      Genome Therapeutics Corp.          GENE        2.00         8.50        3.00        13.00     
 1/23/96       2/16/96      Gilead Sciences Inc.               GILD        3.50        38.50        4.00        37.75     
  2/6/96       2/23/96      BioChem Pharma Inc.                BCHXF       3.00        43.69        3.50        45.50     
 2/12/96        3/7/96      Sequana Therapeutics               SQNA        1.50        23.25        1.70        19.00     
 1/29/96        3/8/96      Alpha-Beta Technology Inc.         ABTI        2.00        14.88        3.00        14.00     
  2/9/96        3/8/96      SangStat Medical Corporation       SANG        2.00        14.13        3.45        14.00     
 2/14/96       3/14/96      Oncogene Science Inc.              ONCS        2.50         8.63        2.83         9.13     
 1/22/96       3/15/96      Centocor Inc.                      CNTO        3.50        28.50        4.03        33.00     
 2/23/96       3/21/96      Advanced Tissue Sciences, Inc.     ATIS        3.00        10.31        3.00        13.25     


<CAPTION>
                                                                  First Day                                             
                                       Offered                     Closing     Current                                  
                           Offer      Shares to     First Day     Price to      Stock       Current       Current       
 Filing       Offer       Price to      Filed        Closing      Price to      Price       Price to      Price to      
  Date       Amount      File Price     Shares        Price      Offer Price   1/3/97      File Price   Offer Price     
  ----       ------      ----------     ------        -----      -----------   ------      ----------   -----------     
<S>            <C>          <C>          <C>           <C>          <C>        <C>           <C>           <C>          
 2/14/95       8.00        -15.8%       -50.0%         7.88         -1.6%       15.25         60.5%         90.6%       
 3/16/95      26.10         -7.9%       -14.3%        14.06         -3.0%       39.00        147.6%        169.0%       
 3/21/95      27.00        -19.1%         0.0%         9.00          0.0%       18.50         66.3%        105.6%       
  3/3/95       8.90         10.3%        48.3%         4.19          4.7%        9.63        165.5%        140.6%       
 4/14/95      13.39          6.8%        13.3%         3.75         -4.8%        5.75         55.9%         46.0%       
 6/27/95      67.50         26.8%        20.0%        23.50          4.4%       21.06         18.7%         -6.4%       
  6/9/95      58.00         16.0%        33.3%        15.06          3.9%       16.50         32.0%         13.8%       
 7/19/95      51.92         23.5%        17.0%        18.25          2.8%       11.50        -20.0%        -35.2%       
 8/24/95      14.40          0.0%         0.0%         2.50        108.3%        1.69         40.6%         40.6%       
 7/14/95      19.50        -16.1%        66.7%         8.75         34.6%       21.50        177.4%        230.8%       
  8/4/95      35.00         27.0%        75.0%        10.25          2.5%        9.25         17.5%         -7.5%       
 7/14/95      94.25         13.4%        62.2%        23.50          1.1%       24.50         19.5%          5.4%       
  7/7/95      40.00          3.6%         0.0%        16.50          3.1%       19.63         27.1%         22.7%       
 7/28/95      56.00         34.7%        16.7%        16.13          0.8%       15.75         32.6%         -1.6%       
 8/16/95      10.00         -4.8%         0.0%        10.63          6.3%        6.13        -41.7%        -38.8%       
 8/29/95      25.80         -3.4%        20.0%        11.38          5.8%        6.13        -44.9%        -43.0%       
  8/4/95      84.00         -1.8%        50.0%        28.00          0.0%       68.25        139.5%        143.8%       
 8/15/95      14.00         -3.4%         0.0%         6.88         -1.8%       22.38        208.6%        219.6%       
 8/15/95      30.63          3.2%         0.0%        13.25          8.2%       16.75         41.1%         36.7%       
  9/1/95      20.31          3.2%         0.0%         7.75         -4.6%       12.50         58.7%         53.8%       
 8/17/95      45.00          1.7%         0.0%        15.13          0.8%        7.25        -50.8%        -51.7%       
  8/9/95      46.25         62.6%         0.0%        18.38         -0.7%        6.63        -41.8%        -64.2%       
  9/1/95      37.50          3.4%        25.0%        15.25          1.7%       20.25         39.7%         35.0%       
 8/25/95      59.13        -18.9%        10.0%        21.75          1.2%       41.00         54.7%         90.7%       
 9/26/95      21.57         -5.0%        53.3%         9.75          3.9%        9.50         -3.8%          1.3%       
 8/24/95      25.00        -23.8%       -16.7%        10.31          3.1%       18.00         37.1%         80.0%       
 9/14/95      28.00        -24.8%         0.0%        14.88          6.3%       15.00        -19.5%          7.1%       
 9/15/95      13.50        -33.3%         0.0%         6.00         33.3%       16.50        144.4%        266.7%       
 9/14/95     128.13        -14.6%         0.0%        52.63          2.7%       23.13        -61.5%        -54.9%       
 9/18/95      25.20        -25.0%       -44.0%        17.75         -1.4%       11.63        -51.6%        -35.4%       
  9/5/95      47.70         -7.0%        20.0%        13.50          1.9%        6.13        -57.0%        -53.8%       
 9/13/95      18.00        -28.7%       -20.0%        10.00         11.1%        5.50        -56.4%        -38.9%       
 9/27/95      42.90         -6.4%        30.0%        11.63          5.7%       16.13         37.2%         46.6%       
 9/25/95      19.50        -31.6%         0.0%         6.56          1.0%        6.19        -34.9%         -4.8%       
10/12/95      32.30         -9.5%        13.3%        18.25         -3.9%       51.00        142.9%        168.4%       
 9/26/95      24.15        -29.4%       -23.3%        10.25         -2.4%       17.13         15.1%         63.1%       
12/22/95      15.80        -22.4%        21.5%         6.81          4.8%        6.56        -21.6%          1.0%       
10/27/95      36.92          8.2%        11.9%         9.63         16.7%        4.63        -39.3%        -43.9%       
 1/18/96       5.50        -20.0%         0.0%         2.88         15.0%        1.13        -64.0%        -55.0%       
  1/3/96      62.10         -4.0%        72.5%        19.75          9.7%       16.69        -11.0%         -7.3%       
 1/10/96      39.00         52.9%        50.0%        14.88         14.4%       10.88         27.9%        -16.3%       
 1/23/96     151.00         -1.9%        14.3%        37.75          0.0%       24.50        -36.4%        -35.1%       
  2/6/96     159.25          4.1%        16.7%        46.63          2.5%       49.63         13.6%          9.1%       
 2/12/96      32.30        -18.3%        13.3%        19.00          0.0%       16.00        -31.2%        -15.8%       
 1/29/96      42.00         -5.9%        50.0%        13.75         -1.8%       10.50        -29.4%        -25.0%       
  2/9/96      48.30         -0.9%        72.5%        15.63         11.6%       28.00         98.2%        100.0%       
 2/14/96      25.78          5.7%        13.0%         9.88          8.2%        6.38        -26.1%        -30.1%       
 1/22/96     132.83         15.8%        15.0%        34.63          4.9%       34.63         21.5%          4.9%       
 2/23/96      39.75         28.5%         0.0%        12.81         -3.3%       10.88          5.5%        -17.9%       
</TABLE>


             Current      Current       
 Filing      Market        Tech.        
  Date        Value        Value        
  ----        -----        -----        
 2/14/95      180.27      145.98        
 3/16/95      631.41      577.51        
 3/21/95      677.10      635.38        
  3/3/95       58.14       37.65        
 4/14/95       93.51       76.38        
 6/27/95      516.39      361.19        
  6/9/95      449.56      327.46        
 7/19/95      160.71      100.88        
 8/24/95       72.57       60.27        
 7/14/95      300.53      237.89        
  8/4/95      179.05      146.40        
 7/14/95      699.70      409.30        
  7/7/95      278.91      184.49        
 7/28/95      257.45      187.00        
 8/16/95      123.87       41.28        
 8/29/95      123.87       41.28        
  8/4/95      921.38      830.50        
 8/15/95      413.31      364.66        
 8/15/95      257.72      207.70        
  9/1/95      392.50      352.95        
 8/17/95       93.65       57.67        
  8/9/95       53.59       17.31        
  9/1/95      271.01      228.57        
 8/25/95      766.82      648.76        
 9/26/95      146.58      108.16        
 8/24/95      462.67      394.10        
 9/14/95      279.42      233.27        
 9/15/95      363.46      336.14        
 9/14/95     1661.65     1379.25        
 9/18/95      240.75      170.38        
  9/5/95      130.18       74.78        
 9/13/95       86.37       45.01        
 9/27/95      471.17      428.72        
 9/25/95       80.41       45.87        
10/12/95      523.62      486.10        
 9/26/95      439.19      364.25        
12/22/95      144.47      113.96        
10/27/95      132.05       98.47        
 1/18/96       15.39        4.34        
  1/3/96      361.40      280.33        
 1/10/96      190.35      156.33        
 1/23/96      699.70      409.30        
  2/6/96     2619.36     2619.06        
 2/12/96      161.30       97.54        
 1/29/96      175.58      121.44        
  2/9/96      366.97      329.52        
 2/14/96      139.54       90.20        
 1/22/96     2393.35     2232.95        
 2/23/96      407.48      351.84        

<PAGE>

         Completed Biotechnology Public Equity Follow-On Offerings (1)
                       January 1, 1995 to January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                                                          
                                                                         Original                   Total                 
 Filing                                                                   Shares     Original      Shares       Offer     
  Date       Issue Date              Issuer                   Ticker      Filed     File Price     Offered      Price     
  ----       ----------              ------                   ------      -----     ----------     -------      -----     
<S>            <C>          <C>                                <C>         <C>          <C>         <C>          <C>      
  2/6/96       3/22/96      Arris Pharmaceuticals              ARRS        3.00        15.38        3.00        13.00     
 2/20/96       3/22/96      Guilford Pharmaceuticals           GLFD        2.00        21.50        2.00        20.00     
  3/1/96        4/1/96      Matrix Pharmaceuticals             MATX        2.50        23.38        2.75        22.63     
  3/7/96        4/2/96      Alliance Pharmaceuticals           ALLP        2.50        17.25        2.50        16.50     
 3/11/96        4/2/96      NeoProbe Corp.                     NEOP        1.75        20.69        1.75        18.50     
  4/4/96       4/30/96      Fuisz Technologies                 FUSE        3.00        27.00        3.90        25.00     
  4/9/96        5/1/96      Neurex Corp.                       NXCO        3.00        16.75        3.00        22.75     
  4/3/96        5/1/96      Pathogenesis Corp.                 PGNS        2.00        13.50        2.50        16.25     
 3/29/96        5/2/96      GelTex Pharmaceuticals             GELX        2.00        22.50        2.50        22.75     
  4/5/96        5/3/96      Atrix Laboratories Inc.            ATRX        2.50        11.38        2.25        11.63     
 3/29/96        5/3/96      Life Medical Sciences              CHAI        2.00         6.75        2.00         6.63     
 3/20/96        5/3/96      NPS Pharmaceuticals                NPSP        2.00        12.25        3.00        16.00     
  4/9/96        5/8/96      Icos Corp.                         ICOS        6.00         8.75        6.00         7.63     
 4/11/96       5/16/96      Aronex Pharmaceuticals Inc.        ARNX        6.00         5.06        6.00         5.00     
 4/10/96       5/23/96      Molecular Biosystems Inc.          MB          3.00         9.13        3.60         9.00     
 4/10/96       5/30/96      Biosource International Inc.       BIOI        2.15         6.19        2.50         9.25     
  5/3/96        6/3/96      Interneuron Pharmaceuticals        IPIC        2.50        41.75        3.00        39.00     
  5/3/96        6/6/96      IDEC Pharmaceuticals Corp.         IDPH        1.50        27.13        1.80        24.00     
 4/16/96       6/20/96      Targeted Genetics Corporation      TGEN        3.50         5.13        3.50         4.00     
  4/1/96       6/26/96      Oravax                             ORVX        2.50        13.50        2.00         7.25     
 5/26/96        7/2/96      La Jolla Pharmaceutical            LJPC        3.00         7.00        2.00         5.38     
 6/10/96        7/3/96      Creative Biomolecules              CBMI        2.00         7.31        2.00         7.00     
 6/21/96       7/25/96      Agouron Pharmaceuticals            AGPH        2.50        39.25        2.50        30.00     
 6/12/96       7/30/96      Genzyme Transgenics                GZTC        3.00         8.13        3.00         4.00     
  7/3/96        8/8/96      Vertex Pharmaceuticals             VRTX        3.00        33.00        3.00        24.00     
 6/28/96        8/9/96      Anergen, Inc.                      ANRG        4.00         4.63        3.50         3.00     
 7/18/96        8/9/96      Ergo Science                       ERGO        2.50        16.75        2.50        12.25     
 7/23/96       8/26/96      T Cell Sciences                    TCEL        5.00         2.94        5.00         2.19     
 6/28/96       9/25/96      BioCryst Pharmaceuticals           BCRX        2.00        17.00        2.00        10.00     
 9/25/96      10/24/96      Ligand Pharmaceuticals             LGND        2.75        14.75        2.75        12.00     
10/15/96      10/25/96      SUGEN                              SUGN        2.00        13.88        2.00        12.00     
  6/6/96      10/28/96      Immune Response                    IMNR        2.50        12.38        2.20         6.50     
10/15/96       11/1/96      Amylin Pharmaceuticals             AMLN        1.50        13.00        1.75        10.00     


<CAPTION>
                                                                  First Day                                          
                                       Offered                     Closing     Current                               
                           Offer      Shares to     First Day     Price to      Stock       Current       Current       
 Filing       Offer       Price to      Filed        Closing      Price to      Price       Price to      Price to      
  Date       Amount      File Price     Shares        Price      Offer Price   1/3/97      File Price   Offer Price     
  ----       ------      ----------     ------        -----      -----------   ------      ----------   -----------     
<S>            <C>          <C>          <C>           <C>          <C>        <C>           <C>           <C>          
  2/6/96      39.00        -15.5%         0.0%        12.88         -1.0%       13.88         -9.8%          6.7%       
 2/20/96      40.00         -7.0%         0.0%        20.13          0.6%       21.50          0.0%          7.5%       
  3/1/96      62.22         -3.2%        10.0%        22.88          1.1%        6.13        -73.8%        -72.9%       
  3/7/96      41.25         -4.3%         0.0%        17.25          4.5%       15.38        -10.9%         -6.8%       
 3/11/96      32.38        -10.6%         0.0%        18.88          2.0%       15.13        -26.9%        -18.2%       
  4/4/96      97.50         -7.4%        30.0%        25.50          2.0%        8.00        -70.4%        -68.0%       
  4/9/96      68.25         35.8%         0.0%        27.88         22.5%       16.50         -1.5%        -27.5%       
  4/3/96      40.63         20.4%        25.0%        18.25         12.3%       21.25         57.4%         30.8%       
 3/29/96      56.88          1.1%        25.0%        22.75          0.0%       23.00          2.2%          1.1%       
  4/5/96      26.16          2.2%       -10.0%        11.75          1.1%       10.88         -4.4%         -6.5%       
 3/29/96      13.25         -1.9%         0.0%         8.00         20.8%        6.63         -1.9%          0.0%       
 3/20/96      48.00         30.6%        50.0%        16.25          1.6%       11.75         -4.1%        -26.6%       
  4/9/96      45.75        -12.9%         0.0%         7.88          3.3%        7.63        -12.9%          0.0%       
 4/11/96      30.00         -1.2%         0.0%         5.06          1.3%        8.88         75.4%         77.5%       
 4/10/96      32.40         -1.4%        20.0%        10.00         11.1%        7.00        -23.3%        -22.2%       
 4/10/96      23.13         49.4%        16.3%        10.13          9.5%        6.63          7.0%        -28.4%       
  5/3/96     117.00         -6.6%        20.0%        38.38         -1.6%       26.25        -37.1%        -32.7%       
  5/3/96      43.20        -11.5%        20.0%        23.88         -0.5%       22.50        -17.1%         -6.3%       
 4/16/96      14.00        -22.0%         0.0%         4.06          1.6%        4.38        -14.6%          9.4%       
  4/1/96      14.50        -46.3%       -20.0%         7.75          6.9%        5.38        -60.2%        -25.9%       
 5/26/96      10.75        -23.2%       -33.3%         5.50          2.3%        5.75        -17.9%          7.0%       
 6/10/96      14.00         -4.2%         0.0%         7.09          1.3%       10.13         38.5%         44.6%       
 6/21/96      75.00        -23.6%         0.0%        30.50          1.7%       68.25         73.9%        127.5%       
 6/12/96      12.00        -50.8%         0.0%         4.06          1.6%        6.25        -23.1%         56.3%       
  7/3/96      72.00        -27.3%         0.0%        24.44          1.8%       38.25         15.9%         59.4%       
 6/28/96      10.50        -35.2%       -12.5%         3.25          8.3%        3.75        -19.0%         25.0%       
 7/18/96      30.63        -26.9%         0.0%        12.44          1.6%       12.75        -23.9%          4.1%       
 7/23/96      10.94        -25.5%         0.0%         2.38          8.5%        1.63        -44.7%        -25.7%       
 6/28/96      20.00        -41.2%         0.0%        12.88         28.8%       15.75         -7.4%         57.5%       
 9/25/96      33.00        -18.6%         0.0%        12.50          4.2%       15.34          4.0%         27.9%       
10/15/96      24.00        -13.5%         0.0%        11.88         -1.0%       12.88         -7.2%          7.3%       
  6/6/96      14.30        -47.5%       -12.0%         6.88          5.8%        8.25        -33.3%         26.9%       
10/15/96      17.50        -23.1%        16.7%        10.75          7.5%       12.50         -3.8%         25.0%       

                      Completed 1995 Offerings
                   ----------------------------------------------------------------------------------------------
           Mean             -2.6%        11.3%                       6.5%                     36.0%         45.6%
           Median           -4.1%         0.0%                       2.2%                     32.3%         28.8%
           High             62.6%        75.0%                     108.3%                    208.6%        266.7%
           Low             -33.3%       -50.0%                      -4.8%                    -61.5%        -64.2%
                   ----------------------------------------------------------------------------------------------
                      Completed 1996 Offerings
                   ----------------------------------------------------------------------------------------------
           Mean             -7.2%        10.8%                       5.5%                     -8.0%          2.2%
           Median           -6.8%         0.0%                       2.4%                    -10.9%          0.0%
           High             52.9%        72.5%                      28.8%                     98.2%        127.5%
           Low             -50.8%       -33.3%                      -3.3%                    -73.8%        -72.9%
                   ----------------------------------------------------------------------------------------------
</TABLE>


             Current      Current       
 Filing      Market        Tech.        
  Date        Value        Value        
  ----        -----        -----        
  2/6/96      198.07      148.23        
 2/20/96      300.53      284.47        
  3/1/96      130.18       74.78        
  3/7/96      462.30      390.89        
 3/11/96      310.64      267.71        
  4/4/96      162.87       94.21        
  4/9/96      363.46      338.75        
  4/3/96      295.31      223.70        
 3/29/96      310.57      223.84        
  4/5/96      120.66       86.25        
 3/29/96       52.44       36.76        
 3/20/96      138.66       67.44        
  4/9/96      300.49      245.60        
 4/11/96      129.19       88.03        
 4/10/96      122.96       73.66        
 4/10/96       55.08       41.09        
  5/3/96     1076.72      904.13        
  5/3/96      405.36      322.50        
 4/16/96       88.03       63.59        
  4/1/96       53.52       20.18        
 5/26/96       93.51       66.58        
 6/10/96      315.38      285.21        
 6/21/96      921.38       13.17        
 6/12/96      106.71       94.00        
  7/3/96      805.70      667.68        
 6/28/96       70.26       51.11        
 7/18/96      165.95      124.50        
 7/23/96       40.57       23.72        
 6/28/96      215.60      172.24        
 9/25/96      436.93      345.84        
10/15/96      166.20      104.26        
  6/6/96      166.49      115.80        
10/15/96      392.50      314.70        

- ----------
(1)  Excludes unit offerings and shelf-registrations.

(2)  Issue sold on best efforts basis.

(3)  Public offering sold to one investor, Amerindo Investment Advisors.


<PAGE>

                  Biotechnology Offerings in Registration (1)
                             As of January 2, 1997
                       ($ millions except per share data)

<TABLE>
<CAPTION>
                                                                                               
                                                                                               
                                                                    File Price/                
                                                                    Mid-Point       Stock      
                                                         Shares     of Filing       Price      
Filing Date          Issuer                  Ticker       Filed       Range         1/3/97     
- ----------- ----------------------------     ------      ------     -----------     ------     
<S>         <C>                               <C>          <C>        <C>           <C>        
Initial Public Offerings
 4/26/96    Cell Therapeutics                 CTIC         3.50       11.00           NM       
  6/6/96    Progenitor                        PGEN         2.50       12.00           NM       
  7/3/96    Immusol                           IMSL         3.00       10.00           NM       
 7/16/96    Ingenex                           INGX         1.85        9.00           NM       
  8/9/96    Alanex Corporation                ALNX         2.50       11.00           NM       
 8/22/96    Transcend Therapeutics, Inc.      TSND         2.00       13.00           NM       
  9/3/96    Introgen Therapeutics, Inc.       INGN         3.20       11.00           NM       
 10/7/96    Progenics Pharmaceuticals         PRGN         2.00       12.00           NM       
 11/1/96    Aastrom Biosciences               ASTM         3.25        9.00           NM       
11/22/96    Virologix                          --          1.15        6.00           NM       
12/11/96    Coulter Pharmaceuticals           CLTR         2.50       13.00           NM       
12/12/96    ILEX Oncology                     ILXO         2.50       12.00           NM       
12/18/96    Chemgenics Pharmaceuticals        CGNS         2.50       12.00           NM       
                                                                                               
Follow-On Offerings                                                                            
 6/14/96    Pharmacyclics                     PCYC         2.00       18.25         15.88      
 8/16/96    Synbiotics                        SBIO         1.24        3.94          3.19      
11/14/96    Myriad Genetics                   MYGN         1.70       28.50         24.25      
12/19/96    Cambridge Neuroscience            CNSI         2.00       13.25         11.25      


<CAPTION>
                             Post-Money                                   
              ------------------------------------------
                   Primary              Fully-Diluted                     
              ------------------------------------------
              Market      Tech        Market       Tech                    
Filing Date   Value       Value       Value        Value       Underwriters   
- -----------   ------      -----       ------       -----       --------------------------------------------
<S>           <C>          <C>        <C>          <C>         <C>                                          
Initial Public Offerings
 4/26/96      114.50       56.59      170.15       68.14       CS First Boston                              
  6/6/96       87.53       60.30       95.12       63.64       Vector/Tucker Anthony/Genesis Merchant Group 
  7/3/96      129.84      105.22      147.94      123.12       Painewebber/Needham/Sutro                    
 7/16/96       43.60       30.84       50.35       35.67       Kaufman Bros.                                
  8/9/96       68.72       39.38       84.18       53.95       PaineWebber/Needham/Sutro                    
 8/22/96       74.74       48.61       79.68       53.10       Vector/Tucker Anthony                        
  9/3/96      119.50       80.49      128.97       88.65       PaineWebber/Genesis Merchant Grp             
 10/7/96      102.65       78.01      126.43       90.97       Oppenheimer/Vector                           
 11/1/96      119.12       85.71      129.31       88.54       Cowen/J.P. Morgan                            
11/22/96       21.21       15.00       22.40       15.86       Rickel & Associates                          
12/11/96      130.13       77.25      148.02       93.45       H&Q/Alex Brown/Pacific-Growth                
12/12/96      140.16       89.44      153.85       96.38       Salomon/Cowen/SBI                            
12/18/96      121.25       82.74      155.15       90.24       Cowen/Montgomery                             
                                                                                                            
Follow-On Offerings                                                                            
 6/14/96      192.13      133.95      215.32      146.09       Morgan Stanley/Cowen/Invemed                 
 8/16/96       28.53       17.57       28.53       17.57       -                                            
11/14/96      291.58      185.13      331.29      211.78       Cowen/UBS                                    
12/19/96      225.26      173.41      244.63      182.75       Robertson Stephens/Paine Webber              
</TABLE>

- ----------
(1)  Excludes unit offerings and shelf-registrations.


<PAGE>



                                  PROJECT 007

                             Presentation Materials

                                January 6, 1997


                                                                  MORGAN STANLEY
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                                Table of Contents


SECTION     I         TRANSACTION OVERVIEW

                      Recent News Summary
                      Closing Share Price and Volume Analysis
                      Analysis of Shareholdings
                      Analysis of Option Holdings

SECTION     II        VALUATION INDICATIONS

                      Summary of Valuation Analyses
                      Acquisition Matrix
                      Key Pricing Parameters (Precedent Transactions Analysis)
                      Discounted Cash Flow Analysis

SECTION     III       SHARE PRICE PERFORMANCE

                      Annotated Price Graph
                      Biotech Indexed Price Performance Since IPO
                      Biotech Indexed Price Performance Since Initial Offer Date

APPENDIX    A         Discounted Cash Flow Analysis - Base Case

            B         Weighted Average Cost of Capital Analysis


                                                                  MORGAN STANLEY
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                               Recent News Summary



       Date                           Summary Description
- -----------------   ------------------------------------------------------------

December 10, 1996   Preliminary results announced from European Phase
                    I/II clinical trials to support multiple myeloma patients
                    undergoing high dose chemotherapy. Results for the seven
                    patients showed that the median time to successful
                    engraftment (recovery) of neutrophils (white blood cells)
                    was 11 days and was 13 days for platelet independence.

December 4, 1996    FDA accepted a filing to initiate a gene therapy
                    trial using hematopoietic stem-cells to treat HIV-infected
                    patients.

November 22, 1996   Initiated clinical trials of hematopoietic stem
                    cell transplants to support non-Hodgkin's lymphoma and
                    breast cancer patients undergoing high dose chemotherapy.

October 28, 1996    007 independent directors reject Sandoz's offer.


                                                                  MORGAN STANLEY
<PAGE>


                                   PROJECT 007
- --------------------------------------------------------------------------------
                    Closing Share Price and Volume Analysis
                              02-Jan-96 to Present

- ---------------------------------------------
Revised Offer Price
- ---------------------------------------------
Premium Over
Current Price(1)                        29.5%
1 Day Prior to Initial Offer(2)         77.3%
30 Days Prior to Initial Offer(3)       51.5%
- ---------------------------------------------

- ---------------------------------------------
Initial Offer Price
- ---------------------------------------------
Premium Over
Current Price(1)                        12.9%
1 Day Prior to Initial Offer(2)         54.5%
30 Days Prior to Initial Offer(3)       32.0%
- ---------------------------------------------


[Line graph repesenting the closing share price and stock trading volume from
January 2, 1996 through January 3, 1997]


                                                                  MORGAN STANLEY
<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
                           Analysis of Shareholdings
<TABLE>
<CAPTION>
                                                                Primary            %                         Fully           %
                                              Equity            Shares          Primary                     Diluted        Fully
Shareholders                               Orientation       Outstanding(5)     Shares      Options(6)     Shares(7)     Diluted(7)
- -------------------------------------- --------------------  ---------------   ---------   ------------   -----------   ------------
<S>                                    <C>                      <C>              <C>        <C>            <C>                <C>
Institutions(1)
Morgan J P & Company, Inc.(2)          Growth                   1,487,323        10.3%             0        1,487,323           9.2%
Aetna Services Inc                     N/A                        249,103         1.7%             0          249,103           1.5%
W T G & Co. L P                        N/A                        221,000         1.5%             0          221,000           1.4%
Calif Public Emp Ret Sys               Growth                     109,099         0.8%             0          109,099           0.7%
New York State Teachers Retirement     Index                       95,600         0.7%             0           95,600           0.6%
Barclays Bank PLC                      Index                       69,614         0.5%             0           69,614           0.4%
Schroder Wertheim & Co                 Value                       47,600         0.3%             0           47,600           0.3%
Mellon Bank Corporation                Index,Value                 41,643         0.3%             0           41,643           0.3%
Bear Stearns & Co                      Value                       34,450         0.2%             0           34,450           0.2%
Kellner Dileo & Co.                    Growth                      29,800         0.2%             0           29,800           0.2%
First Manhattan Co.                    Value                       26,610         0.2%             0           26,610           0.2%
Dimensional Fund Advisors.             Quant.                      24,649         0.2%             0           24,649           0.2%
ANB Investment Mgmt                    Growth,Value                23,400         0.2%             0           23,400           0.1%
Arnhold & S. Bleichroeder              Value,Growth                18,800         0.1%             0           18,800           0.1%
Remaining 9 Institutions                                           63,514         0.4%             0           63,514           0.4%
                                                              ------------    ---------   -------------   -----------   ------------
 Total Institutional Holdings                                   2,542,205        17.5%             0        2,542,205          15.7%

Beneficial/Directors and Officers(3)         Position
                                       ---------------------
Sandoz Biotech Holdings Corp.                                  10,610,099        73.2%             0(7)    10,610,099          65.6%
John J. Schwartz                       President,CEO               31,000         0.2%       209,487          240,487           1.5%
Irving L. Weissman                     Director                   144,603         1.0%        13,459          158,062           1.0%
Joesph J. Ruvane, Jr.                  Chairman of the Board            0         0.0%        48,362           48,362           0.3%
Harold Edgar                           Director                     8,275         0.1%        34,439           42,714           0.3%
Other Insiders (14 individuals)(4)                                  6,800         0.0%       166,540          173,340           1.1%
                                                              ------------    ---------   -------------   -----------   ------------
 Total Insider Holdings                                        10,800,777        74.5%       472,287(7)    11,273,064          69.7%

Other Holdings                                                  1,155,987         8.0%     1,203,003(8)     2,358,990          14.6%
                                                              ------------    ---------   -------------   -----------   ------------

 Total Shares Outstanding                                      14,498,969       100.0%     1,675,290       16,174,259         100.0%
                                                              ============    =========   =============   ===========   ============
</TABLE>

Notes:  (1) Based on the latest 13(f) filings as of 9/96 of investment companies
            and institutions.
        (2) Includes 1,251,871 shares of common stock held by Morgan Guaranty
            Company of New York as a result of Eli S. Jacob's bankruptcy.
        (3) Based on 6/1/96 Proxy Statement including beneficial interests and
            on 9/30/95 option holdings information.
        (4) Represents directors and executive officers owning less than 40,000
            shares of common stock plus options.
        (5) Based on common stock outstanding as of 10/31/96 from the 9/30/96
            10-Q.
        (6) Includes all outstanding options (includes options not currently
            exercisable or in the money).
        (7) Excludes 1,367,600 warrants held by Sandoz Biotech Holdings Corp.
        (8) Includes options held by other employees, consultants and SARL of
            007.


                                                                  MORGAN STANLEY
<PAGE>
                                   PROJECT 007
- --------------------------------------------------------------------------------
                        Analysis of Option Holdings(1)

- --------------------------------------------------------------------------------
              Total Options Outstanding:          1,675,290
                 Average Exercise Price:             $14.79
- --------------------------------------------------------------------------------

================================================================================
                                          Options in the
                         Number of            Money/
                       Options in the      Total Options          Total Cost
  Offer Price              Money            Outstanding           to Sandoz
- -----------------      --------------    ------------------    -----------------

    $17.00               1,132,567             67.6%               4,035,740

     17.13               1,132,567             67.6%               4,177,311

     17.25               1,255,317             74.9%               4,318,881

     17.38               1,255,317             74.9%               4,475,796

     17.50               1,255,317             74.9%               4,632,711

     17.63               1,255,317             74.9%               4,789,625

     17.75               1,255,317             74.9%               4,946,540

     17.88               1,255,317             74.9%               5,103,455

     18.00               1,255,317             74.9%               5,260,369

     18.13               1,255,317             74.9%               5,417,284

     18.25               1,255,317             74.9%               5,574,198

     18.38               1,255,317             74.9%               5,731,113

     18.50               1,270,317             75.8%               5,888,028

     18.63               1,270,317             75.8%               6,046,817

     18.75               1,270,317             75.8%               6,205,607

     18.88               1,270,317             75.8%               6,364,397

     19.00               1,273,317             76.0%               6,523,186

     19.25               1,417,564             84.6%               6,841,515

     19.50               1,417,564             84.6%               7,195,906

     19.75               1,417,564             84.6%               7,550,297

     20.00               1,418,814             84.7%               7,904,688

     21.00               1,418,814             84.7%               9,323,502

     23.00               1,430,814             85.4%              12,176,130

     25.00               1,461,264             87.2%              15,091,133

     30.00               1,611,264             96.2%              22,584,953

     35.00               1,623,264             96.9%              30,644,273

     40.00               1,638,264             97.8%              38,820,593

     41.25               1,675,290            100.0%              40,868,423
================================================================================

Note: (1) Based on option holdings information as of 09/30/95.

                                                                  MORGAN STANLEY
<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
                         Summary of Valuation Analyses
                                     ($MM)

[The following table was represented as a line graph in the printed material.]

             Price 1 Day Prior to   Current Market  Initial Offer  Revised Offer
                Initial Offer           Price           Price           Price
                   $11.00(2)          $15.06(3)        $17.00          $19.50
             -------------------------------------------------------------------

1996 Trading Range                                   $11.00-$18.63

Pre-Announcement
  Trading Range(4)                                   $11.00-$16.75

Precedent Transactions
  Analysis                                           $13.42-$18.69

DCF Base Case(5)
  (HSC on-line 2001)                                 $12.62-$19.72

DCF Downside Case(6)
  (HSC on-line 2001)                                  $2.70-$7.24

Per Share Value
   ($/share)

 Primary(1)
Equity Value
   ($MM)

Notes: (1) Based on 14.5MM primary shares outstanding.
       (2) As of 5/23/96.
       (3) As of 1/3/97.
       (4) Last twelve months prior to announcement of initial Sandoz offer.
       (5) Based on discounted cash flow analysis with probability adjustments
           of 100%, 75% and 50% (1997-2002, 2003, 2004-2007, respectively) and
           15.0$ to 16.0% discount rates using 17.0x to 20.0x P/E exit
           multiples.
       (6) Adjusted base case reflects probability adjustments of 100%, 50% and
           33% (1997-2002, 2003, 2004-2007, respectively).


                                                                  MORGAN STANLEY
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                               Acquisition Matrix
                             Premiums Based on Price
                         ($MM, except per share amounts)
<TABLE>
<CAPTION>
                                                                                           Premium to:
                                                            -----------------------------------------------------------------------
                                     Net                                             Price Prior to Initial
 Price    Primary   Equity Value   Pre-Tax    Total Equity                                   Offer:            Pre-Announcement(6)
  Per     Equity    of Pub. Trad.  Option     Purch. Price    Current  Prev. Buy-in  ----------------------   ---------------------
 Share    Value(1)   Shares(2)     Cost(3)    for Sandoz(4)    Price     Price(5)      30 Days      1 Day        High        Low
- -------   --------  ------------   -------   --------------   -------  ------------  -----------  ----------  ----------  ---------
                                                             01/03/97     01/31/95     04/24/96    05/23/96    01/05/96   05/23/96
                                                              $15.06       $16.63       $12.88      $11.00      $16.75     $11.00
                                                            -----------------------------------------------------------------------
<S>       <C>          <C>          <C>         <C>           <C>          <C>          <C>          <C>        <C>         <C>
 $11.00   $159.5       $42.8        1.533       $44.3         -27.0%       -33.8%       -14.6%        0.0%      -34.3%       0.0%
  12.00    174.0        46.7        1.681        48.3         -20.3%       -27.8%        -6.8%        9.1%      -28.4%       9.1%
  13.00    188.5        50.6        1.895        52.5         -13.7%       -21.8%         1.0%       18.2%      -22.4%      18.2%
  14.00    203.0        54.4        2.225        56.7          -7.0%       -15.8%         8.7%       27.3%      -16.4%      27.3%
  15.00    217.5        58.3        2.632        61.0          -0.4%        -9.8%        16.5%       36.4%      -10.4%      36.4%
  16.00    232.0        62.2        3.175        65.4           6.2%        -3.8%        24.3%       45.5%       -4.5%      45.5%
- -----------------------------------------------------------------------------------------------------------------------------------
  17.00    246.5        66.1        4.036        70.1          12.9%         2.2%        32.0%       54.5%        1.5%      54.5%
- -----------------------------------------------------------------------------------------------------------------------------------
  17.13    248.3        66.6        4.177        70.8          13.7%         3.0%        33.0%       55.7%        2.2%      55.7%
  17.25    250.1        67.1        4.319        71.4          14.5%         3.8%        34.0%       56.8%        3.0%      56.8%
  17.38    251.9        67.6        4.476        72.0          15.4%         4.5%        35.0%       58.0%        3.7%      58.0%
  17.50    253.7        68.1        4.633        72.7          16.2%         5.3%        35.9%       59.1%        4.5%      59.1%
  17.63    255.5        68.5        4.790        73.3          17.0%         6.0%        36.9%       60.2%        5.2%      60.2%
  17.75    257.4        69.0        4.947        74.0          17.9%         6.8%        37.9%       61.4%        6.0%      61.4%
  17.88    259.2        69.5        5.103        74.6          18.7%         7.5%        38.8%       62.5%        6.7%      62.5%
  18.00    261.0        70.0        5.260        75.3          19.5%         8.3%        39.8%       63.6%        7.5%      63.6%
  18.50    268.2        71.9        5.888        77.8          22.8%        11.3%        43.7%       68.2%       10.4%      68.2%
  19.00    275.5        73.9        6.523        80.4          26.2%        14.3%        47.6%       72.7%       13.4%      72.7%
- -----------------------------------------------------------------------------------------------------------------------------------
  19.50    282.7        75.8        7.196        83.0          29.5%        17.3%        51.5%       77.3%       16.4%      77.3%
- -----------------------------------------------------------------------------------------------------------------------------------
  20.00    290.0        77.8        7.905        85.7          32.8%        20.3%        55.3%       81.8%       19.4%      81.8%
</TABLE>

Notes: (1) Based on primary shares outstanding of 14.499MM as of 10/31/96 from
           the 9/30/96 10-Q.

       (2) Excludes shares already owned by Sandoz (10.610MM).

       (3) Based on option holdings information as of 09/30/95.

       (4) Total Equity Purchase Price equals Equity Value of Shares not already
           owned + Net Option Cost. Assumes no Debt or excess Cash.

       (5) Purchase price assumed equal to total investment of $80.00 MM less
           $3.25MM in value of warrants divided by 4.616 MM purchased shares.
           Refers to 01/31/95 announced Sandoz investment in 007, increasing
           holding to 71.6% on a fully diluted basis; presently 68.4% on a fully
           diluted basis including all outstanding options and warrants.

       (6) From 05/24/95 to 05/23/96. Last twelve months prior to announcement.


                                                                  MORGAN STANLEY
<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
            Key Pricing Parameters (Precedent Transactions Analysis

<TABLE>
<CAPTION>

Market Prices
                                                                                                          Price
                                                                                                     --------------

Current Stock Price (January 3, 1997)                                                                        $15.06
1996 Low to High Trading Range Pre-Offer (January 1 to May 23, 1996)                                  11.00 - 16.75
Price 30 Days Prior to Offer (April 24, 1996)                                                                 12.88
Price 1 Day Prior to Offer (May 23, 1996)                                                                     11.00
Low to High Trading Range Between Offer and Rejection (May 24 to October 28, 1996)                    14.98 - 18.63
Low to High Trading Range Between Rejection and Present                                               14.00 - 15.63

Biotechnology Sector Market Performance Since Offer

General U.S. Market (S&P 500)                                                                                   9.6%
Tier I Biotech Companies (Tier I Biotech Index)(1)                                                             (4.9)
Tier II and III Tier Biotech Companies (Gene Therapy and Transgenic Index)(2)                                 (19.9)

Offer Price Implications

<CAPTION>
                                                                             Premium over Price
                                                                        ---------------------------
             Value of       Net P/T        Total        % Options          Prior to Initial Offer:     Premium over
  Stock      Minority        Option     Transaction    Outstanding      ---------------------------      Current
  Price     Interest(3)     Cost(4)        Cost        in the Money      30 Days            1 Day         Price
- ----------  ------------   ---------    ------------   -------------    -----------      ----------    ------------
<S>           <C>             <C>         <C>              <C>            <C>               <C>           <C>
  $17.00      $66.1           $4.0        $70.1            67.6%          32.0%             54.5%         12.9%
   19.50       75.8            7.2         83.0            76.0           51.5              77.3          29.5

<CAPTION>

Precedent Transactions
                                                                           Premium over Price
                                                                             Prior to Offer:             Average
                                                                      -----------------------------    Implied 007
Precedent Transaction                                                   30 Days            1 Day       Stock Price
- --------------------------------------                                ------------      -----------    ------------

Biotech Minority Squeeze-Outs
     RPR/AISX (10/95)                                                     46.9%             67.9%        $18.69
     Failed - AHP/IMNX (11/95)                                             4.5              20.8          13.37
  Biotech 100% Control Transactions                                       47.0              64.7          18.52
Selected Biotech Majority Partial Purchases                               57.9              38.5          17.79
Minority Squeeze-Outs
         1994-1995                                                        11.0              14.0          13.42
         1992-1993                                                        15.5              14.0          13.71
         1990-1991                                                        34.0              28.0          15.67
         1987-1989                                                        30.0              15.0          14.69
     Transactions (1987-1995)                                             28.0              18.5          14.76
Selected Biotech Minority Investments
     Transactions after 1/1/94                                            22.7              20.1          14.50
     Transactions after 1/1/91                                            24.6              20.1          14.62
     All Transactions                                                     24.6              20.1          14.62
   Sandoz/007 (1/95)                                                      (5.0)              4.0          NM
   Sandoz/007 (12/91)                                                     60.0             110.0          21.85


- --------------------------------------------------------------------------------------------------------------------
Relevant Range                                                                                        $13.42-$18.69
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

Notes: (1) Includes AMGN, BGEN, CHIR, CNTO, GENIZ, GENZ, GNE, GNSA, IMNX and
           SYGN.
       (2) Includes AISX, CEGE, CEPH, CPRO, IMNR and VICL.
       (3) Assumes 3.889 MM primary shares outstanding.
       (4) Assumes 1.675MM options outstanding with exercise prices ranging from
           $.01 to $41.25. (90%, 95% and 100% of options would be in the money
           at prices of $28.75, $28.75 and $41.25.)

<PAGE>

                                                                  MORGAN STANLEY
                                   PROJECT 007
- --------------------------------------------------------------------------------
                                 DCF Assumptions

I.   General Assumptions

     o    2.0% candidate base growth per annum

     o    Indications for aggressive (i.e., high dose or myelosuppressive)
          chemotherapy only. All patients over age 65 excluded

     o    European incidence 1.5 times U.S. incidence and 50% of U.S. market
          estimates for treatment

     o    Japan incidence 0.5 times U.S. incidence and 50% of U.S. market
          estimates for treatment

     o    Treatment price increase of 2.0% per annum

     o    Assumes product launch in 2001. Stem Cell Treatments (Isolated Stem
          Cells, with switchover four years later to Expanded Progenitor/Stem
          Cells upon introduction, through bone marrow or autologous
          treatments). Isolated treatment phased out prior to launch of expanded
          treatment

<TABLE>
<CAPTION>
                                                      Assumptions                                 Comments
                                             ---------------------------------  --------------------------------------------------
<S>                                          <C>                                <C>    
II.  Revenues

     A.   Revenue-Generating Products        Isolated Stem Cell Treatment       o    Company has administered European Phase
                                                                                     I/II clinical trials

                                             Expanded Stem Cell Treatment            Follows four years after ISC introduction

     B.   Indications for Stem Cell          Hematologic Cancers                     Leukemia, Multiple Myeloma and Lymphoma
          Treatment
                                             Solid Tumors Cancers                    Breast, Ovarian and Small Cell Lung
</TABLE>

                                                                  MORGAN STANLEY
                                      -8-
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                                 DCF Assumptions
                                   (continued)
<TABLE>
<CAPTION>
                                                                  Assumptions                                             
                                      -------------------------------------------------------------------
     C.   Incidence and Clinically                                     US Incidence       US Candidates         
          Eligible Candidates                                          ------------       -------------          

                                      <S>                                 <C>                <C>              
                                      Leukemia                             22,900             12,480           
                                      Lymphoma (includes Hodgkin's,
                                      Non-Hodgkin's) and
                                      Multiple Myeloma                     63,700             16,449
                                      Breast                              183,000             21,960
                                      Other (includes small cell           64,500             17,752
                                      lung and ovarian)
                                                                          -------             ------
                                                        Total             334,100             68,641
                                                                          =======             ======

                                      European incidence assumed to be 1.5 times U.S. incidence with 50%
                                      of U.S. market penetration rates

                                      Japan incidence assumed to be 0.5 times U.S. incidence with 50% of
                                      U.S. market penetration rates
</TABLE>

                      Comments                                       
- --------------------------------------------------  
o    Smaller candidate population: high dose 
     chemotherapy and no patients over 65
                                                      
o    Base candidate growth by 2.0% per annum
                                                      
<TABLE>
<CAPTION>

     D.   Market Penetration                                   2001        2003        2005      2007         
                                                               ----        ----        ----      ----         
          <S>                                                  <C>         <C>         <C>       <C>          
          (Candidates Treated by
          the Company as a % of       Leukemia                 2.3%        17.5%       37.1%     55.0%        
          Total Base Candidates)      Lymphoma (includes                                                      
                                           Hodgkin's,
                                           Non-Hodgkin's)
                                           and Multiple        
                                           Myeloma             4.1         18.5        31.8      40.8 
                                      Breast                   1.5          5.0        10.9      15.4 
                                      Other (includes small    1.5          3.8         7.1       9.4 
                                           cell lung           
                                           and ovarian)
</TABLE>

                      Comments                                       
- --------------------------------------------------  
o    Market shares are disease-specific
                                             
o    Company is no longer first-to-market 
     with stem cell treatments

                                                                  MORGAN STANLEY
                                      -9-
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                                 DCF Assumptions
                                   (continued)

<TABLE>
<CAPTION>
                                                     Assumptions                                     Comments
                                       --------------------------------------  --------------------------------------------------
     <S>                               <C>                                     <C>      
     E.    Treatments Per Patient      Isolated Stem Cells -- 1                o     Includes Hematologic Cancers and Solid
           Per Year                                                                  Tumor Cancers
                                       Expanded Stem Cells

                                       a.   Hematologic Cancers -- 1
                                            (ablative chemotherapy)

                                       b.   Solid Tumor Cancers -- 4
                                            (high dose chemotherapy)

     F.    Pricing Per Treatment       Isolated Stem Cells (2001 - 2004)       o     2.0% increase in price per patient per
                                                                                     year
                                       a.   Hematologic Cancers -- $10,800

                                       b.   Solid Tumor Cancers -- $8,100

                                       Expanded Stem Cells (2005 - 2007)

                                       a.   Hematologic Cancers -- $15,000

                                       b.   Solid Tumor Cancers -- $3,750

                                       European price equal to U.S.

                                       Japan price equal to U.S.
</TABLE>

    
                                                                  MORGAN STANLEY
                                      -10-
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                                 DCF Assumptions
                                   (continued)

<TABLE>
<CAPTION>
                                                    Assumptions                                     Comments
                                      --------------------------------------  --------------------------------------------------
     <S>                              <C>                                     <C>      
     G.   Non-Product Revenue         Revenue from Collaborative Agreements   o    Revenue from collaborative agreements and
                                      -------------------------------------        grants assumed to be phased out upon
                                      1997      $3.9MM                             product launch
                                      1998       3.8MM
                                      1999       1.5MM
                                      2000       2.0MM
                                      2001       2.5MM
                                      No revenue from 2002 forward

                                      Revenue from Grants
                                      -------------------
                                      1997      $0.5MM
                                      1998       0.3MM
                                      1999       0.3MM
                                      2000       0.3MM
                                      2001       0.3MM
                                      No revenue from 2002 forward

     H.   Other Income (Expense)      No other income assumed from 
                                      1997 forward

     I.   Potential Upside            Gene therapy for HIV                    o    Costs and potential  revenue are currently
                                                                                   excluded  from  the  model  due  to  highly
                                                                                   speculative  nature  at  present  and  high
                                                                                   probability discount
</TABLE>


                                                                  MORGAN STANLEY
                                      -11-

<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
III. Expenses
    A.    Cost of Goods Sold          Isolated Stem Cells                               o Higher costs in early years
                                      33% of Sales (2001-2004)

                                      Expanded Stem Cells
                                      19% of Sales (2005-2006)
                                      17% of Sales thereafter

    B.    Unabsorbed Manufacturing    Monoclonal Antibody (MAbs) Production Costs       o Monoclonal antibody production costs
          Costs                       1997   $2.8MM                                       phased out as centers become operational
                                      1998    2.8MM
                                      1999    2.9MM
                                      2000    3.0MM
                                      2001    2.7MM
                                      2002    1.4MM

                                      Center Operating Costs                            o 12 centers opened through 2007
                                      2003   $4.8MM
                                      2004    0.8MM
                                      2005    0.9MM
                                      2006    0.9MM
                                      2007    3.6MM
</TABLE>


                                                                  MORGAN STANLEY
                                      -12-
<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
    C.    Research & Development      1997   $50.0MM                                    o Includes product development costs
                                      1998    55.5MM
                                      1999    60.0MM
                                      5% growth thereafter

                                                            % of Sales
                                              ---------------------------------------
    D.    Clinical & Regulatory,              Clinical &    Sales &      General &      o Smaller expenditures,  particularly in the
          Marketing & Sales and               Regulatory   Marketing   Administrative     out years
          General & Administrative            ----------   ---------   --------------
                                      2002       13.3%       6.9%           9.6%
                                      2003        6.5        4.3            6.0
                                      2004        4.4        3.0            4.2
                                      2005        3.4        2.4            3.4
                                      2006        2.9        2.1            3.0
                                      2007        2.6        1.9            2.7

    E.    Income Tax Rate                              41%                              o Full NOL utilization assumed when 007
                                                                                          achieves positive earnings, except for
                                                                                          terminal year
</TABLE>


                                                                  MORGAN STANLEY
                                      -13-
<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
IV. Cash Flow
                                           Depreciation & 
    A.    Depreciation &                   Amortization        Capital Expenditure      o Much greater capital expenditures in
          Amortization and Capital         ----------------    -------------------        the early years, but substantially
          Expenditure                 1997      $7.5MM               $26.1MM              lower after 1997            
                                      1998       8.2MM                 3.0MM
                                      1999       8.9MM                 3.0MM
                                      2000       9.6MM                 3.5MM
                                      2001      11.1MM                15.7MM
                                      2002      11.1MM                 9.2MM
                                      2003      11.1MM                 9.7MM
                                      2004      11.7MM                14.9MM
                                      2005      15.8MM                15.4MM
                                      2006      15.1MM                10.2MM
                                      2007      18.3MM                17.4MM

    B.    Investment in Non-Cash               20% of Change in Sales                   o Based on working capital needs of
          Working Capital                                                                 comparable biotech companies
</TABLE>


                                                                  MORGAN STANLEY
                                      -14-
<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
V.       DCF Valuation

         A.    Price/Earnings Exit                 17.0x-20.0x                          o Expected P/E multiple for mature
               Multiple                                                                   biotech company after product
                                                                                          introduction

         B.    Discount Rate                       15.0%-16.0%                          o Based on weighted average cost of
                                                                                          capital analysis for Tier I and Tier
                                                                                          II representative biotech companies.
                                                                                          Upon product launch, 007 would be
                                                                                          considered a Tier I/II biotech company

         C.    Cash and Debt          Cash and Cash Equivalents -- $4.0MM               o Cash and debt balances projected for
                                      Short-term Investments -- $37.5MM                   12/31/96 based on adjusting 9/30/96
                                      Debt (capital lease obligations) -- $5.5MM          10-Q data by incremental change
                                                                                          between 6/30/96 and 9/30/96 data
</TABLE>


                                                                  MORGAN STANLEY
                                      -15-
<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
         D.    Options                Option proceeds -- $20.4MM                        o 1,417,564 options outstanding with an
                                                                                          exercise price of $19.50 or below (out
                                                                                          of total number of options, 1,675,290)

                                                                                        o 257,726 options assumed to be
                                                                                          cancelled due to exercise price in
                                                                                          excess of $19.50 offer price
         E.    Common Shares 
               Outstanding            Fully diluted shares -- 15.9MM                    o Includes 14.5MM primary shares
                                                                                          outstanding as of 10/31/96 from
                                                                                          9/30/96 10-Q
</TABLE>


                                                                  MORGAN STANLEY
                                      -16-
<PAGE>

                                  PROJECT 007
                                DCF Assumptions
- --------------------------------------------------------------------------------
                                  (continued)

<TABLE>
<CAPTION>
                                                       Assumptions                                        Comments
                                      ------------------------------------------------  --------------------------------------------
          <S>                         <C>                                               <C>
         F.    Probability Weighting  Base Case                                         o In line with other biotech/gene
               Factor                                                                     therapy valuation approaches given
                                      Prior to product launch -- 100%                     stage of development and milestones
                                      After product launch                                yet to be reached

                                        2001-2002     --      100%
                                        2003          --       75%
                                        50% thereafter

                                      Downside Case

                                      Prior to product launch -- 100%
                                      After product launch

                                        2001-2002     --      100%
                                        2003          --       50%
                                        33% thereafter
</TABLE>


                                                                  MORGAN STANLEY
                                      -17-

<PAGE>
                                   PROJECT 007
- --------------------------------------------------------------------------------
                          Discounted Cash Flow Analysis
                                    Base Case
                         ($000, except otherwise noted)
<TABLE>
<S>                                            <C>        <C>       <C>           <C>        <C>       <C>       
                                            -------------------------------    -------------------------------   
P/E Exit Multiple                                         17.0x                              18.5x               
                                            -------------------------------    -------------------------------   
Discount Rate                                  15.0%      15.5%     16.0%         15.0%      15.5%     16.0%     
                                            -------------------------------    -------------------------------   

PV of 1st Year Cash Flow                     ($86,738)  ($86,550) ($86,363)     ($86,738)  ($86,550) ($86,363)   
PV of Cash Flows 2 thru 6 @ 100.0%           (239,750)  (236,478) (233,273)     (239,750)  (236,478) (233,273)   
PV of Cash Flows 7 @ 75.0%                     (5,993)    (5,827)   (5,665)       (5,993)    (5,827)   (5,665)   
PV of Cash Flows 8 thru 11 @ 50.0%             92,867     89,155    85,608        92,867     89,155    85,608    
PV of Terminal Value @ 50.0%                  422,473    402,785   384,094       459,750    438,325   417,984    
                                            -------------------------------    -------------------------------   

Asset Value                                  $182,859   $163,085   144,400      $220,136   $198,625   178,291    

       Less Debt (1)                            5,524      5,524     5,524         5,524      5,524     5,524    
       Plus Options Proceeds (2)               20,447     20,447    20,447        20,447     20,447    20,447    
       Plus Excess Cash  (1)                   41,518     41,518    41,518        41,518     41,518    41,518    
                                            -------------------------------    -------------------------------   

Equity Value                                 $239,299   $219,526  $200,841      $276,577   $255,066  $234,732    
                                            ===============================    ===============================   

       Per Share (3)                           $15.03     $13.79    $12.62        $17.38     $16.03    $14.75    

Probability Wtd. Terminal Value @ 50.0%     1,965,510  1,965,510 1,965,510     2,138,937  2,138,937 2,138,937    
                                            ===============================    ===============================   
</TABLE>
                                            -------------------------------
P/E Exit Multiple                                         20.0x
                                            -------------------------------
Discount Rate                                  15.0%      15.5%     16.0%
                                            -------------------------------

PV of 1st Year Cash Flow                     ($86,738)  ($86,550) ($86,363)
PV of Cash Flows 2 thru 6 @ 100.0%           (239,750)  (236,478) (233,273)
PV of Cash Flows 7 @ 75.0%                     (5,993)    (5,827)   (5,665)
PV of Cash Flows 8 thru 11 @ 50.0%             92,867     89,155    85,608
PV of Terminal Value @ 50.0%                  497,027    473,865   451,875
                                            -------------------------------

Asset Value                                  $257,413   $234,165   212,182

       Less Debt (1)                            5,524      5,524     5,524
       Plus Options Proceeds (2)               20,447     20,447    20,447
       Plus Excess Cash  (1)                   41,518     41,518    41,518
                                            -------------------------------

Equity Value                                 $313,854   $290,606  $268,622
                                            ===============================

       Per Share (3)                           $19.72     $18.26    $16.88

Probability Wtd. Terminal Value @ 50.0%     2,312,364  2,312,364 2,312,364
                                            ===============================

Notes:

(1)  Cash and Debt projected for 12/31/96. Adjusted by applying incremental
     difference from 6/30 to 9/30/96 balance to 9/30 10-Q data.

(2)  Assumes exercise of 1,417,564 options at an exercise price of $19.50 or
     below (out of total number of options, 1,675,290).

(3)  Based on 15.9MM fully diluted shares outstanding (including 1.418MM options
     exercisable at or below a price of $19.50) as of 10/31/96 from 9/30/96
     10-Q.

                                                                  MORGAN STANLEY
                                      -18-

<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                          Discounted Cash Flow Analysis
                                  Downside Case
                         ($000, except otherwise noted)

<TABLE>
<CAPTION>
                                             -----------------------------------------     ----------------------------------------
P/E Exit Multiple                                                17.0x                                         18.5x               
                                             -----------------------------------------     ----------------------------------------
<S>                                              <C>            <C>           <C>             <C>            <C>           <C>     
Discount Rate                                      15.0%          15.5%         16.0%           15.0%          15.5%         16.0% 
                                             -----------------------------------------     ----------------------------------------
PV of 1st Year Cash Flow                        ($86,738)      ($86,550)     ($86,363)       ($86,738)      ($86,550)     ($86,363)
PV of Cash Flows 2 thru 6 @ 100.0%              (239,750)      (236,478)     (233,273)       (239,750)      (236,478)     (233,273)
PV of Cash Flows 7 @ 50.0%                        (3,996)        (3,885)       (3,777)         (3,996)        (3,885)       (3,777)
PV of Cash Flows 8 thru 11 @ 33.0%                61,292         58,843        56,501          61,292         58,843        56,501 
PV of Terminal Value @ 33.0%                     278,832        265,838       253,502         303,435        289,294       275,870 
                                             -----------------------------------------     ----------------------------------------
Asset Value                                       $9,641        ($2,232)      (13,410)        $34,244        $21,224         8,958 

  Less Debt (1)                                    5,524          5,524         5,524           5,524          5,524         5,524 
  Plus Options Proceeds (2)                       20,447         20,447        20,447          20,447         20,447        20,447 
  Plus Excess Cash (1)                            41,518         41,518        41,518          41,518         41,518        41,518 
                                             -----------------------------------------     ----------------------------------------
Equity Value                                     $66,082        $54,208       $43,031         $90,685        $77,665       $65,399 
                                             =========================================     ========================================
  Per Share (3)                                    $4.15          $3.41         $2.70           $5.70          $4.88         $4.11 

Probability Wtd. Terminal Value @ 33.0%        1,297,236      1,297,236     1,297,236       1,411,699      1,411,699     1,411,699 
                                             -----------------------------------------     ----------------------------------------
</TABLE>

                                         --------------------------------------
P/E Exit Multiple                                          20.0x
                                         --------------------------------------
Discount Rate                                 15.0%        15.5%         16.0%
                                         --------------------------------------

PV of 1st Year Cash Flow                   ($86,738)    ($86,550)     ($86,363)
PV of Cash Flows 2 thru 6 @ 100.0%         (239,750)    (236,478)     (233,273)
PV of Cash Flows 7 @ 50.0%                   (3,996)      (3,885)       (3,777)
PV of Cash Flows 8 thru 11 @ 33.0%           61,292       58,843        56,501
PV of Terminal Value @ 33.0%                328,038      312,751       298,238
                                         --------------------------------------
Asset Value                                 $58,847      $44,680        31,326

  Less Debt (1)                               5,524        5,524         5,524
  Plus Options Proceeds (2)                  20,447       20,447        20,447
  Plus Excess Cash (1)                       41,518       41,518        41,518
                                         --------------------------------------
Equity Value                               $115,287     $101,121       $87,767
                                         ======================================

  Per Share (3)                               $7.24        $6.35         $5.51

Probability Wtd. Terminal Value @ 33.0%   1,526,161    1,526,161     1,526,161
                                         ======================================

Notes:

(1)  Cash and Debt projected for 12/31/96. Adjusted by applying incremental
     difference from 6/30 to 9/30/96 balance to 9/30 10-Q data.

(2)  Assumes exercise of 1,417,564 options at an exercise price of $19.50 or
     below (out of total number of options, 1,675,290).

(3)  Based on 15.9MM fully diluted shares outstanding (including 1.418MM options
     exercisable at or below a price of $19.50) as of 10/31/96 from 9/30/96
     10-Q.


                                                                  MORGAN STANLEY
                                      -19-

<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
                             Annotated Price Graph
                              02-Dec-91 to Present

 [The following table was represented as a line graph in the printed material.]

  Date                            Prices
- -----------                       ------
02-Dec-91-                         35
23-Jun-92-                         27.75
13-Jan-93-                         24
05-Aug-93-                         17
25-Feb-94-                         19.25
19-Sep-94-                         18.25
11-Apr-95-                         12.5
01-Nov-95-                         14.5
23-May-96-                         11
11-Dec-96-                         14.563

12/16/91
Announced sale of 60% interest to Sandoz for $392MM

2/19/92
Tender offer for the Company completed

3/27/92
FYE EPS ($1.35)

4/20/92
Stem cell gene therapy moves into clinical phase

6/19/92
Announced JV with Sandoz Pharma Ltd. to research human stem cell renewal

8/18/92
Merrill Lynch downgrades stock to "below average"

2/18/93
FYE EPS ($0.84)

4/15/93
Announces 50/50 IV with Sandoz Pharmaceutical Corp. to research and develop gene
therapy for H.I.V.


7/1/93
Signs collaboration agreement with Centre Leon Berad

12/16/93
Enters into agreement with Sandoz Pharma Ltd. to develop and discover
therapeutic agents for H.I.V. infection

5/6/94
Ended June, 1992 collaboration agreement with Sandoz related to human stem cell
growth research

10/20/94
President, CEO Linda Sonntag resigns

1/31/95
Sandoz increases holding with $80MM equity; control of 71.6% on a fully diluted
basis

6/1/95
Announced U.S. Phase I/II Clinical Trials

10/2/95
Announced preliminary results of Phase I/II clinical trial of autologous
hematopoietic stem cell (HSC) transplantation

5/24/96
Sandoz announces offer at $17/share to buy 27% stake in 007, not already owned

10/28/96
Independent directors reject Sandoz offer

12/10/96
Announced European Phase I/II clinical trial results on multiple myeloma
patients

                                                                  MORGAN STANLEY

                                    -20-

<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
                   Biotech Indexed Price Performance Since IPO
                              02-Dec-91 to Present

 [The following table was represented as a line graph in the printed material.]

                         Gene Therapy 
                             and                       Tier I
                          Transgenic  Pharmaceutical  Biotech
  Date              007     Index(1)      Index(2)    Index(3)     S&P 500
- -----------       ------  -----------  --------------  --------   -----------

02-Dec-91-         100.0     100.0          100.0         100.0        100.0
17-Jul-92-          85.0      79.3           97.6          92.8        109.0
04-Mar-93-          48.6      64.7           61.2          76.7        117.3
20-Oct-93-          53.6      81.2           79.4          80.2        122.2
07-Jun-94-          42.1      55.5           68.3          77.0        120.1
23-Jan-95-          46.4      33.6           65.7          86.0        122.1
08-Sep-95-          37.9      60.4           85.0         105.0        150.2
25-Apr-96-          36.4      71.3          108.4         129.3        171.2
02-Jan-97-          79.2      82.3          100.9         115.4        108.6



Notes: (1) Composed of AISX, CEGE, CEPH, CPRO, IMNR, VICL.
       (2) Composed of ABT, AHP, BMY, JNJ, LLY, MKC, MRK, PFE, RPR, SGP, SYN, 
           UPJ, WLA.
       (3) Composed of AMGN, BGEN, CHIR, CNTO, GENIZ, GENZ, GNE, GNSA, IMNX,
           SYGN.


                                                                  MORGAN STANLEY
                                      -21-

<PAGE>

                                  PROJECT 007
- --------------------------------------------------------------------------------
           Biotech Indexed Price Performance Since Initial Offer Date
                              24-May-96 to Present

 [The following table was represented as a line graph in the printed material.]

                          Gene Therapy 
                               and                       Tier I
                            Transgenic  Pharmaceutical  Biotech
  Date                007     Index(1)      Index(2)    Index(3)     S&P 500
- -----------         ------ -----------  --------------  --------   -----------

24-May-96-           100.0    100.0        100.0          100.0       100.0
21-Jun-96-            95.3     87.6         91.9          102.4        98.3
19-Jul-96-            93.3     72.1         89.3          100.4        94.1
16-Aug-96-            81.9     71.3         92.8          103.2        98.0
13-Sep-96-            85.6     75.1         92.3          107.2       100.2
11-Oct-96-            87.2     79.5         97.5          110.5       103.3
Rejection Date   
October 28, 1996
08-Nov-96-            80.5     76.9         94.4          118.8       107.7
06-Dec-96-            76.5     83.7         95.3          116.1       109.0
02-Jan-97-            42.1     60.6        111.4          155.4       193.2




Notes: (1) Composed of AISX, CEGE, CEPH, CPRO, IMNR, VICL.
       (2) Composed of ABT, AHP, BMY, JNJ, LLY, MKC, MRK, PFE, RPR, SGP, SYN, 
           UPJ, WLA.
       (3) Composed of AMGN, BGEN, CHIR, CNTO, GENIZ, GENZ, GNE, GNSA, IMNX,
           SYGN.


                                                                  MORGAN STANLEY
                                      -22-

<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                          Consolidated Revenue Build-Up
                                    Base Case
                         ($000, except otherwise noted)

<TABLE>
<CAPTION>
                                                                                  Projections
                                              --------------------------------------------------------------------------------------
                                                2001         2002         2003        2004          2005         2006         2007
                                              --------------------------------------------------------------------------------------
<S>                                            <C>          <C>          <C>          <C>          <C>          <C>          <C>   
Candidate Base
U.S. Candidates                                66,841       68,178       69,541       70,932       72,351       73,798       75,274
  Growth                                                       2.0%         2.0%         2.0%         2.0%         2.0%         2.0%
  European Factor                                75.0%        75.0%        75.0%        75.0%        75.0%        75.0%        75.0%
European Candidates                            50,131       51,133       52,156       53,199       54,263       55,348       56,455
  Japan Factor                                   25.0%        25.0%        25.0%        25.0%        25.0%        25.0%        25.0%
Japan Candidates                               16,710       17,044       17,385       17,733       18,088       18,449       18,818
                                              --------------------------------------------------------------------------------------
Total Candidates                              133,682      136,356      139,083      141,864      144,702      147,596      150,548

Wtd. Avg. Market Penetration/Growth Factor        2.3%         7.2%        10.2%        15.2%        19.7%        23.6%        27.3%
  % Growth                                                   214.9%        42.8%        48.9%        29.7%        19.4%        15.7%

Patients Treated                                3,040        9,766       14,221       21,602       28,569       34,805       41,063

Wtd. Avg. Price ('000)                       $    8.8   $      8.8   $      8.8   $      8.8   $     15.0   $     15.0   $     15.0
Net Wtd. Avg. Price ('000)                   $    8.8   $      9.0   $      9.2   $      9.4   $     15.0   $     15.3   $     15.6

Inflation Adjustment                                           2.0%         2.0%         2.0%         2.0%         2.0%         2.0%

  % Growth in Net Wtd. Avg. Price                              2.0%         2.0%         2.0%        60.5%         2.0%         2.0%
                                              --------------------------------------------------------------------------------------
Total Revenue                                $ 26,816   $   87,854   $  130,492   $  202,186   $  429,105   $  533,221   $  641,681
                                              ======================================================================================
</TABLE>

                                                                  MORGAN STANLEY
                                      -23-

<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                                Income Statement
                                    Base Case
                         ($000, except otherwise noted)

<TABLE>
<CAPTION>
                                                         Actual                                 Projections
                             -------------------------------------------------------------------------------------------------
                                  1992        1993        1994        1995        1996        1997        1998        1999    
                             -------------------------------------------------------------------------------------------------
<S>                                 <C>         <C>         <C>         <C>         <C>         <C>         <C>         <C>   
Revenue by Product Line
  Isolated HSC's                    $0          $0          $0          $0          $0          $0          $0          $0    
  Expanded HSC's                     0           0           0           0           0           0           0           0    
  Collaborative Research         4,747       5,883       3,211       2,320       9,416       3,909       3,828       1,500    
  Grants                           452         328         234         992         105         490         300         300    
  Other                             29         213         669         304         147           0           0           0    
                             -------------------------------------------------------------------------------------------------
Total Revenues                   5,228       6,424       4,114       3,616       9,668       4,399       4,128       1,800    
      % Growth                                22.9%      -36.0%      -12.1%      167.4%      -54.5%       -6.2%      -56.4%   

Cost by Product Line 
at Standard
  Isolated HSC's                     0           0           0           0           0           0           0           0    
      % of Sales                   0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
  Expanded HSC's                     0           0           0           0           0           0           0           0    
      % of Sales                   0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   
                             -------------------------------------------------------------------------------------------------
Total Costs                          0           0           0           0           0           0           0           0    
      % of Sales                   0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%        0.0%   

Gross Profit                     5,228       6,424       4,114       3,616       9,668       4,399       4,128       1,800    
     Gross Margin %               N.M.        N.M.        N.M.        N.M.        N.M.        N.M.        N.M.        N.M.    

Unabsorbed Manufacturing 
Costs
  Center Operating Costs             0           0           0           0           0           0           0           0    
  MAbs Production Costs              0           0           0           0           0       2,760       2,823       2,890    
                             -------------------------------------------------------------------------------------------------

Total Unab. Manufacturing 
Costs                               0           0           0           0           0       2,760       2,823       2,890     
      % of Sales                  0.0%        0.0%        0.0%        0.0%        0.0%       62.7%       68.4%      160.6%    

Operating Expenses
  Research & Development         9,965      22,969      40,535      46,733      41,455      50,000      55,000      60,000    
      % Growth                               130.5%       76.5%       15.3%      -11.3%       20.6%       10.0%        9.1%   
  Clinical & Regulatory              0           0           0           0           0       9,580      13,708      17,291    
      % of Sales                                                                             217.8%      332.1%      960.6%   
  Marketing & Sales                225           0           0           0           0       2,141       2,355       2,591    
      % of Sales                                                                             -51.3%      -43.0%       43.9%   
  General & Administrative       5,440       8,173       8,819       8,110       7,855       6,312       6,809       7,188    
      % of Sales                 104.1%      127.2%      214.4%      224.3%       81.2%      143.5%      164.9%      299.3%   
  Special Charge                12,175
                             -------------------------------------------------------------------------------------------------
Total Operating Expenses        27,805      31,142      49,354      54,843      49,309      68,033      77,872      87,070    
      % of Sales                 531.8%      484.8%     1199.7%     1516.7%      510.0%     1546.6%     1886.4%     4837.2%   

EBITDA                         (22,577)    (24,718)    (45,240)    (51,227)    (39,641)    (66,394)    (76,567)    (88,160)   
      % of Sales                -431.8%     -384.8%    -1099.7%    -1416.7%     -410.0%    -1509.3%    -1854.8%    -4897.8%   

Earnings Before Taxes          (22,577)    (18,453)    (44,388)    (48,087)    (37,099)    (66,394)    (76,567)    (88,160)   
      % of Sales                -431.8%     -287.3%    -1078.9%    -1329.8%     -383.7%    -1509.3%    -1854.8%    -4897.8%   
Income Taxes                         0           0           0           0           0           0           0           0    
  Effective Tax Rate              N.M.        N.M.        N.M.        N.M.        N.M.        N.M.        N.M.        N.M.    
                             -------------------------------------------------------------------------------------------------
Net Income (Loss)             ($22,577)   ($18,453)   ($44,388)   ($48,087)   ($37,099)   ($66,394)   ($76,567)   ($88,160)   
                             =================================================================================================
      % of Sales               -431.8%     -287.3%    -1078.9%    -1329.8%     -383.7%    -1509.3%    -1854.8%    -4897.8%    

</TABLE>

                                      -24-
<PAGE>

<TABLE>
<CAPTION>

                                                                      Projections
                             ----------------------------------------------------------------------------------------------
                                  2000        2001        2002        2003        2004        2005        2006        2007
                             ----------------------------------------------------------------------------------------------
<S>                              <C>       <C>         <C>        <C>         <C>          <C>         <C>         <C>
Revenue by Product Line
  Isolated HSC's                    $0     $26,816     $87,854    $130,492    $202,186          $0          $0          $0
  Expanded HSC's                     0           0           0           0           0     429,105     533,221     641,681
  Collaborative Research         2,000       2,500           0           0           0           0           0           0
  Grants                           300         300           0           0           0           0           0           0
  Other                              0           0           0           0           0           0           0           0
                             ----------------------------------------------------------------------------------------------
Total Revenues                   2,300      29,616      87,854     130,492     202,186     429,105     533,221     641,681
      % Growth                    27.8%     1187.7%      196.6%       48.5%       54.9%      112.2%       24.3%       20.3%

Cost by Product Line 

at Standard
  Isolated HSC's                     0       8,849      28,992      43,062      66,721           0           0           0
      % of Sales                   0.0%       33.0%       33.0%       33.0%       33.0%        0.0%        0.0%        0.0%
  Expanded HSC's                     0           0           0           0           0      81,530     101,312     109,086
      % of Sales                   0.0%        0.0%        0.0%        0.0%        0.0%       19.0%       19.0%       17.0%
                             ----------------------------------------------------------------------------------------------
Total Costs                          0       8,849      28,992      43,062      66,721      81,530     101,312     109,086
      % of Sales                   0.0%       29.9%       33.0%       33.0%       33.0%       19.0%       19.0%       17.0%

Gross Profit                     2,300      20,767      58,862      87,429     135,465     347,575     431,909     532,596
     Gross Margin %               N.M.       70.1%       67.0%       67.0%       67.0%       81.0%       81.0%       83.0%

Unabsorbed Manufacturing 
Costs
  Center Operating Costs             0           0           0       4,782         833         872         935       3,533
  MAbs Production Costs          2,977       2,653       1,438           0           0           0           0           0
                             ----------------------------------------------------------------------------------------------

Total Unab. Manufacturing 
Costs                           2,977       2,653       1,438       4,782         833         872         935       3,533
      % of Sales                129.4%        9.0%        1.6%        3.7%        0.4%        0.2%        0.2%        0.6%

Operating Expenses
  Research & Development        63,000      66,150      69,458      72,930      76,577      80,406      84,426      88,647
      % Growth                     5.0%        5.0%        5.0%        5.0%        5.0%        5.0%        5.0%        5.0%
  Clinical & Regulatory         19,776      17,531      11,702       8,493       8,933      14,788      15,570      16,396
      % of Sales                 859.8%       59.2%       13.3%        6.5%        4.4%        3.4%        2.9%        2.6%
  Marketing & Sales              4,675       5,336       6,046       5,581       6,096      10,478      11,447      12,505
      % of Sales                 103.3%      -82.0%        6.9%        4.3%        3.0%        2.4%        2.1%        1.9%
  General & Administrative       7,587       8,009       8,475       7,828       8,558      14,719      16,092      17,592
      % of Sales                 229.9%      -73.0%        9.6%        6.0%        4.2%        3.4%        3.0%        2.7%
  Special Charge
                             ----------------------------------------------------------------------------------------------
Total Operating Expenses        95,038      97,026      95,681      94,832     100,164     120,391     127,535     135,141
      % of Sales                4132.1%      327.6%      108.9%       72.7%       49.5%       28.1%       23.9%       21.1%

EBITDA                         (95,715)    (78,912)    (38,256)    (12,185)     34,468     226,312     303,439     393,922
      % of Sales               -4161.5%     -266.5%      -43.5%       -9.3%       17.0%       52.7%       56.9%       61.4%

Earnings Before Taxes          (95,715)    (78,912)    (38,256)    (12,185)     34,468     226,312     303,439     393,922
      % of Sales               -4161.5%     -266.5%      -43.5%       -9.3%       17.0%       52.7%       56.9%       61.4%
Income Taxes                         0           0           0           0           0           0           0     161,685
  Effective Tax Rate              N.M.        N.M.        N.M.        N.M.        N.M.        N.M.        N.M.       41.0%
                             ----------------------------------------------------------------------------------------------
Net Income (Loss)             ($95,715)   ($78,912)   ($38,256)   ($12,185)    $34,468    $226,312    $303,439    $232,236
                             ==============================================================================================
      % of Sales              -4161.5%     -266.5%      -43.5%       -9.3%       17.0%       52.7%       56.9%       36.2%
</TABLE>

Note: (1) Represents interest income assumed to be zero from 1997 onward.


                                                                  MORGAN STANLEY
                                      -25-
<PAGE>

                                   PROJECT 007
- --------------------------------------------------------------------------------
                               Cash Flow Statement
                                    Base Case
                         ($000, except otherwise noted)

<TABLE>
<CAPTION>
                                                       Actual                                       Projections
                                -------------------------------------------------------------------------------------------
                                 1992        1993        1994        1995        1996        1997        1998        1999  
                                -------------------------------------------------------------------------------------------
<S>                              <C>      <C>         <C>         <C>         <C>         <C>         <C>         <C>      
Net Income                                ($18,453)   ($44,388)   ($48,087)   ($37,099)   ($66,394)   ($76,567)   ($88,160)

Add:
Depreciation & Amortization                  3,203       5,541       9,472       9,903       7,547       8,200       8,900 
% of Capital Expenditures                     11.1%       25.0%      222.4%      457.0%       29.0%      273.3%      296.7%
                                         ----------------------------------------------------------------------------------

Operating Cash Flow                        (15,250)    (38,847)    (38,615)    (27,196)    (58,847)    (68,367)    (79,260)

Less:
Capital Expenditures                        28,878      22,152       4,259       2,167      26,052       3,000       3,000 
% of Sales                                   449.5%      538.5%      117.8%       22.4%      592.2%       72.7%      166.7%
Investment in Non Cash Working 
Capital                                     (2,805)      2,280      (2,544)     (8,343)      9,899        (808)       (234)
% of Change in Sales                        -234.5%      -98.7%      510.8%     -137.9%     -187.9%      298.2%       10.1%
                                         ----------------------------------------------------------------------------------

Free Cash Flow                              (5,668)    (27,229)    (18,283)    (23,724)    (93,016)    (70,319)    (81,786)
                                         ----------------------------------------------------------------------------------
% Growth                                                 380.4%      -32.9%       29.8%      292.1%      -24.4%       16.3%

Free Cash Flow as a % of Sales               -88.2%     -661.9%     -505.6%     -245.4%    -2114.5%    -1703.5%    -4543.7%

Probabilty Factor                            100.0%      100.0%      100.0%      100.0%      100.0%      100.0%      100.0%
Probability Weighted Free Cash Flow        ($5,668)   ($27,229)   ($18,283)   ($23,724)   ($93,016)   ($70,319)   ($81,786)
                                         ==================================================================================

<CAPTION>
                                                                           Projections
                                --------------------------------------------------------------------------------------------------
                                      2000        2001        2002        2003        2004        2005        2006        2007
                                --------------------------------------------------------------------------------------------------
<S>                                <C>         <C>         <C>         <C>          <C>        <C>         <C>         <C>     
Net Income                         ($95,715)   ($78,912)   ($38,256)   ($12,185)    $34,468    $226,312    $303,439    $232,236

Add:
Depreciation & Amortization           9,600      11,065      11,065      11,065      11,730      15,790      15,090      18,320
% of Capital Expenditures             274.3%       70.5%      120.3%      114.1%       78.7%      102.5%      147.9%      105.3%
                                 -----------------------------------------------------------------------------------------------

Operating Cash Flow                 (86,115)    (67,847)    (27,191)     (1,120)     46,198     242,102     318,529     250,556

Less:
Capital Expenditures                  3,500      15,700       9,200       9,700      14,900      15,400      10,200      17,400
% of Sales                            152.2%       53.0%       10.5%        7.4%        7.4%        3.6%        1.9%        2.7%
Investment in Non Cash Working 
Capital                                (616)      5,463      11,648       8,527      14,339      45,384      20,823      21,692
% of Change in Sales                 -123.2%       20.0%       20.0%       20.0%       20.0%       20.0%       20.0%       20.0%
                                 -----------------------------------------------------------------------------------------------

Free Cash Flow                      (89,474)    (89,486)    (48,514)    (19,822)     16,484     180,843     287,031     211,464
                                 -----------------------------------------------------------------------------------------------
% Growth                                9.4%        0.0%      -45.8%      -59.1%     -183.2%      997.1%       58.7%      -26.3%

Free Cash Flow as a % of Sales      -3890.2%     -302.2%      -55.2%      -15.2%        8.2%       42.1%       53.8%       33.0%

Probabilty Factor                     100.0%      100.0%      100.0%       75.0%       50.0%       50.0%       50.0%       50.0%
Probability Weighted Free Cash 
Flow                               ($89,474)   ($89,486)   ($48,514)   ($14,867)     $8,242     $90,422    $143,516    $105,732
                                 ===============================================================================================
</TABLE>

                                                                  MORGAN STANLEY
                                      -26-

<PAGE>


                                   PROJECT 007
- --------------------------------------------------------------------------------
                    Weighted Average Cost of Capital Analysis

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                              Predicted                                                                   Unlevered
                                               Equity          Total Debt/        Total Debt/        Preferred/            (Asset)
  Company                                       Beta (1)       Market Value (2)   Market Cap. (2)   Market Value (2)         Beta
  --------------------------               ----------------  ----------------   ----------------   ----------------    -------------
<S>                                             <C>               <C>                <C>                <C>                 <C> 
  Amgen Inc                                     1.17              1.2%               1.2%               1.1%                1.15
  Biogen Inc                                    1.39              2.3%               2.2%               0.0%                1.37
  Chiron Corporation                            1.41             13.9%              12.2%               0.0%                1.30
  Centocor Inc                                  1.73              3.4%               3.3%               0.0%                1.69
  Genetics Institute Inc                        0.99              0.0%               0.0%               0.0%                0.99
  Genzyme Corporation                           1.38              1.9%               1.9%               0.0%                1.36
  Genentech Inc                                 0.71              2.3%               2.3%               0.0%                0.70

                            --------------------------------------------------------------------------------------------------------
                               Mean             1.25              3.6%               3.3%               0.2%                1.22
                               Median           1.38              2.3%               2.2%               0.0%                1.30
                            --------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                   Cost of Capital
                                               -----------------------------------------------------------------------------------
                                                              Debt                                                   
 Total Debt/   Total Preferred/   Relevered    ----------------------------------                                      Weighted
 Market Value   Market Value       Beta (3)       (pre-tax)          (after-tax)      Preferred         Equity         Average (4)
- -------------  ----------------  ------------- ----------------    --------------  --------------   -------------  ---------------

    <S>             <C>             <C>             <C>                 <C>             <C>             <C>              <C>  
     0.0%           0.0%            1.30            8.5%                5.3%            0.0%            16.1%            16.1%
     7.1%           0.0%            1.36            8.7%                5.4%            0.0%            16.5%            15.8%
    14.3%           0.0%            1.41            8.9%                5.5%            0.0%            17.0%            15.5%
    21.4%           0.0%            1.47            9.1%                5.7%            0.0%            17.4%            15.3%
    28.6%           0.0%            1.53            9.4%                5.8%            0.0%            17.8%            15.1%
    35.7%           0.0%            1.59            9.6%                5.9%            0.0%            18.2%            15.0%
    42.9%           0.0%            1.64            9.8%                6.1%            0.0%            18.7%            14.9%
    50.0%           0.0%            1.70           10.0%                6.2%            0.0%            19.1%            14.8%

- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
- --------------------------------------------------------------------------------

Assumptions                                   
- -----------                                   
            Risk Free Rate (5)         6.5%   
            Market Risk Premium        7.4%   
            Marginal Tax Rate         38.0%   
                                              
Formulae                                                                        
- --------                                                                        
                                                                               
       Unlevered Beta =                   Levered Beta                        
                        -------------------------------------------------------
                        1+(Debt/Equity)(1-Marginal Tax Rate)+(Preferred/Equity)]
                                                                               
       Cost of Equity = Risk Free Rate + (Levered Beta x Market Risk Premium)  

- --------------------------------------------------------------------------------

Notes:                    

(1) Source: Barra, U.S. Equity Betas as of January 2, 1997
(2) Based on closing prices on January 2, 1997
(3) Using Median Beta from Comparables
(4) Based on after-tax cost of debt.
(5) Current yield on a 10 year government bond as of January 2, 1997.


                                                                  MORGAN STANLEY
                                      -27-

<PAGE>


                                                                  CONFORMED COPY

================================================================================


                          AGREEMENT AND PLAN OF MERGER

                                      Among

                                 NOVARTIS INC.,

                         NOVARTIS BIOTECH HOLDING CORP.

                                       and

                                 SYSTEMIX, INC.


                          Dated as of January 10, 1997


================================================================================
<PAGE>

                            Glossary of Defined Terms
                          (Not Part of this Agreement)



Defined Term                                             Location of Definition
- ------------                                             ----------------------

 affiliate............................................      ss. 8.03(a)
 Agreement............................................      Preamble
 beneficial owner.....................................      ss. 8.03(b)
 Blue Sky Laws........................................      ss. 3.05(b)
 Board................................................      Recitals
 business day.........................................      ss. 8.03(c)
 Certificate of Merger................................      ss. 2.02
 Certificates.........................................      ss. 2.09(b)
 Code.................................................      ss. 2.10
 Company..............................................      Preamble
 Company Common Stock.................................      Recitals
 Company Preferred Stock..............................      ss. 3.03
 control..............................................      ss. 8.03(d)
 Delaware Law.........................................      Recitals
 Dissenting Shares....................................      ss. 2.08(a)
 Effective Time.......................................      ss. 2.02
 Exchange Act.........................................      ss. 1.02(b)
 First Minimum Condition..............................      ss. 1.01(a)
 Indemnified Parties..................................      ss. 5.05(b)
 Material Adverse Effect..............................      ss. 3.01
 Merger...............................................      Recitals
 Merger Consideration.................................      ss. 2.06(a)
 Offer................................................      Recitals
 Offer Documents......................................      ss. 1.01(b)
 Offer to Purchase....................................      ss. 1.01(b)
 Option...............................................      ss. 2.07(a)
 Parent...............................................      Preamble
 Paying Agent.........................................      ss. 2.09(a)
 Per Share Amount.....................................      Recitals
 person...............................................      ss. 8.03(e)
 Proxy Statement......................................      ss. 3.08
 Purchaser............................................      Preamble
 Schedule 14D-9.......................................      ss. 1.02(b)
 Schedule 14D-1.......................................      ss. 1.01(b)
 Schedule 13E-3.......................................      ss. 1.01(b)
 SEC..................................................      ss. 1.01(b)
 Second Minimum Condition.............................      ss. 1.01(a)
<PAGE>

                                      2



Defined Term                                             Location of Definition
- ------------                                             ----------------------

 SEC Reports..........................................      ss. 3.07(a)
 Securities Act.......................................      ss. 3.07(a)
 Shares...............................................      Recitals
 Stockholders' Meeting................................      ss. 5.02(a)
 Subsidiary...........................................      ss. 3.01
 subsidiary...........................................      ss. 8.03(f)
 Surviving Corporation................................      ss. 2.01
 Transactions.........................................      ss. 1.01(b)
<PAGE>

                                TABLE OF CONTENTS



                                                                            Page

                                   ARTICLE I

                                   THE OFFER

      SECTION 1.01.  The Offer.............................................  2
      SECTION 1.02.  Company Action........................................  3

                                  ARTICLE II

                                  THE MERGER

      SECTION 2.01.  The Merger............................................  5
      SECTION 2.02.  Effective Time; Closing...............................  5
      SECTION 2.03.  Effect of the Merger..................................  5
      SECTION 2.04.  Certificate of Incorporation; By-laws.................  5
      SECTION 2.05.  Directors and Officers................................  6
      SECTION 2.06.  Conversion of Securities..............................  6
      SECTION 2.07.  Stock Options.........................................  6
      SECTION 2.08.  Dissenting Shares.....................................  7
      SECTION 2.09.  Surrender of Shares; Stock Transfer Books.............  7
      SECTION 2.10.  Withholding Rights....................................  8

                                  ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

      SECTION 3.01.  Organization and Qualification; Subsidiaries..........  9
      SECTION 3.02.  Certificate of Incorporation and By-laws..............  9
      SECTION 3.03.  Capitalization........................................  9
      SECTION 3.04.  Authority Relative to this Agreement.................. 10
      SECTION 3.05.  No Conflict; Required Filings and Consents............ 11
      SECTION 3.06.  Compliance............................................ 11
      SECTION 3.07.  SEC Filings; Financial Statements..................... 12
      SECTION 3.08.  Offer Documents; Schedule 14D-9; Schedule 13E-3; Proxy
                        Statement.......................................... 13
      SECTION 3.09.  Brokers............................................... 13
<PAGE>

                                   ii



                                                                            Page


                                  ARTICLE IV

            REPRESENTATIONS AND WARRANTIES OF PARENT AND PURCHASER

      SECTION 4.01.  Corporate Organization................................ 13
      SECTION 4.02.  Authority Relative to this Agreement.................. 14
      SECTION 4.03.  No Conflict; Required Filings and Consents............ 14
      SECTION 4.04.  Offer Documents; Proxy Statement...................... 15
      SECTION 4.05.  Brokers............................................... 15

                                   ARTICLE V

                                   COVENANTS

      SECTION 5.01.  Conduct of the Business Pending the Merger............ 15
      SECTION 5.02.  Stockholders' Meeting................................. 16
      SECTION 5.03.  Proxy Statement....................................... 16
      SECTION 5.04.  Access to Information; Confidentiality................ 16
      SECTION 5.05.  Directors' and Officers' Indemnification and Insurance 17
      SECTION 5.06.  Notification of Certain Matters....................... 19
      SECTION 5.07.  Further Action; Reasonable Best Efforts............... 19
      SECTION 5.08.  Public Announcements.................................. 19
      SECTION 5.09.  Termination of Agreements............................. 19
      SECTION 5.10.  Financing............................................. 20

                                  ARTICLE VI

                           CONDITIONS TO THE MERGER

      SECTION 6.01.  Conditions to the Merger.............................. 20

                                  ARTICLE VII

                       TERMINATION, AMENDMENT AND WAIVER

      SECTION 7.01.  Termination........................................... 21
      SECTION 7.02.  Effect of Termination................................. 22
      SECTION 7.03.  Amendment............................................. 22
<PAGE>

                                     iii



                                                                            Page

      SECTION 7.04.  Waiver................................................ 22

                                 ARTICLE VIII

                              GENERAL PROVISIONS

      SECTION 8.01.  Non-Survival of Representations, Warranties and
                        Agreements......................................... 23
      SECTION 8.02.  Notices............................................... 23
      SECTION 8.03.  Certain Definitions................................... 24
      SECTION 8.04.  Severability.......................................... 25
      SECTION 8.05.  Entire Agreement; Assignment.......................... 25
      SECTION 8.06.  Parties in Interest................................... 25
      SECTION 8.07.  Specific Performance.................................. 26
      SECTION 8.08.  Fees and Expenses..................................... 26
      SECTION 8.09.  Governing Law......................................... 26
      SECTION 8.10.  Headings.............................................. 26
      SECTION 8.11.  Counterparts.......................................... 26

      Annex A:  Conditions to the Offer
<PAGE>

            AGREEMENT AND PLAN OF MERGER, dated as of January 10, 1997 (this
"Agreement"), among NOVARTIS INC., a company organized under the laws of
Switzerland and the successor by merger to Sandoz Ltd. ("Parent"), NOVARTIS
BIOTECH HOLDING CORP. (formerly known as Sandoz Biotech Holdings Corporation), a
Delaware corporation and an indirect wholly owned subsidiary of Parent
("Purchaser"), and SYSTEMIX, INC., a Delaware corporation (the "Company").

            WHEREAS, Purchaser owns an aggregate of 10,610,099 shares of Common
Stock, par value $.01 per share, of the Company ("Company Common Stock") (shares
of Company Common Stock being hereinafter collectively referred to as "Shares");

            WHEREAS, Parent and Purchaser have proposed that Purchaser acquire
all of the remaining issued and outstanding Shares;

            WHEREAS, in furtherance of such acquisition, it is proposed that
Purchaser shall make a cash tender offer in compliance with Section 14(d)(1) of
the Exchange Act (as defined below) and in compliance with the rules and
regulations promulgated thereunder (the "Offer") to acquire all the issued and
outstanding Shares for $19.50 per Share (such amount, or any greater amount per
Share paid pursuant to the Offer, being hereinafter referred to as the "Per
Share Amount") net to the seller in cash, upon the terms and subject to the
conditions of this Agreement and the Offer;

            WHEREAS, in accordance with the terms of Section 2.05 of the
Acquisition Agreement among Parent, Purchaser and the Company dated as of
December 16, 1991 (the "Acquisition Agreement"), and based in part on the
opinion of Lehman Brothers Inc. that the consideration to be received by the
holders of Shares (other than Parent and Purchaser) pursuant to each of the
Offer and the Merger (as defined below) is fair to such holders from a financial
point of view, a majority of the Independent Directors (as defined in the
Acquisition Agreement) has approved the Offer and the Merger (the "Independent
Director Approval");

            WHEREAS, the Boards of Directors of Purchaser and the Company have
each determined that it is in the best interests of their respective
stockholders for Purchaser to acquire all of the remaining issued and
outstanding Shares;

            WHEREAS, the Board of Directors of the Company (the "Board") has, by
unanimous vote of all directors present and voting (with all directors who are
designees of Parent abstaining), approved the making of the Offer and resolved
and agreed to recommend that the holders of the Shares tender their Shares
pursuant to the Offer;

            WHEREAS, also in furtherance of such acquisition, the Board of
Directors of Purchaser and the Company have each approved the merger (the
"Merger") of Purchaser
<PAGE>

                                      2

with and into the Company in accordance with the General Corporation Law of the
State of Delaware ("Delaware Law") following the consummation of the Offer and
upon the terms and subject to the conditions set forth in this Agreement; and

            NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements herein contained, and intending to be legally bound
hereby, Parent, Purchaser and the Company hereby agree as follows:

                                   ARTICLE I

                                   THE OFFER

            SECTION 1.01. The Offer. (a) Provided that this Agreement shall not
have been terminated in accordance with Section 7.01 and none of the events set
forth in Annex A hereto shall have occurred or be existing, Purchaser shall
commence the Offer as promptly as reasonably practicable after the date hereof,
but in no event later than five business days after the initial public
announcement of Purchaser's intention to commence the Offer. Purchaser shall
not, without the consent of a majority of the Independent Directors, accept for
payment any Shares tendered pursuant to the Offer unless at least a majority of
the then issued and outstanding Shares, other than Shares owned by Parent and
Purchaser, shall have been validly tendered and not withdrawn prior to the
expiration of the Offer (the "First Minimum Condition"). The obligation of
Purchaser to accept for payment and pay for Shares tendered pursuant to the
Offer (i) shall be subject to the condition (the "Second Minimum Condition")
that at least the number of Shares that when added to the Shares already owned
by Parent and Purchaser shall constitute not less than 90% (or such other amount
which would allow the Merger to be effected without a meeting of the Company's
stockholders in accordance with Section 253 of the Delaware Law) of the then
issued and outstanding Shares shall have been validly tendered and not withdrawn
prior to the expiration of the Offer and (ii) shall be subject to the
satisfaction of the other conditions set forth in Annex A hereto. Purchaser
expressly reserves the right to waive any such condition (except the First
Minimum Condition), to increase the price per Share payable in the Offer, and to
make any other changes in the terms and conditions of the Offer; provided,
however, that (i) no change may be made which decreases the price per Share
payable in the Offer or which reduces the maximum number of Shares to be
purchased in the Offer or which imposes conditions to the Offer in addition to
those set forth in Annex A hereto and (ii) in the event all conditions set forth
in Annex A shall have been satisfied other than the Second Minimum Condition,
Purchaser may extend the Offer for a period or periods aggregating not more than
20 business days after the later of (x) the initial expiration date of the Offer
and (y) the date on which all other conditions set forth in Annex A shall have
been satisfied, after which time Purchaser shall waive the Second Minimum
Condition. The Per Share Amount shall, subject
<PAGE>

                                      3

to applicable withholding of taxes, be net to the seller in cash, upon the terms
and subject to the conditions of the Offer. Subject to the terms and conditions
of the Offer (including, without limitation, the First Minimum Condition and the
Second Minimum Condition), Purchaser shall pay, as promptly as practicable after
expiration of the Offer, for all Shares validly tendered and not withdrawn.

            (b) As soon as reasonably practicable on the date of commencement of
the Offer, Purchaser shall file with the Securities and Exchange Commission (the
"SEC") (i) a Tender Offer Statement on Schedule 14D-1 (together with all
amendments and supplements thereto, the "Schedule 14D-1") with respect to the
Offer and (ii) a Rule 13e-3 Transaction Statement on Schedule 13E-3 (together
with all amendments and supplements thereto, the "Schedule 13E-3") with respect
to the Offer and the other transactions contemplated hereby (the
"Transactions"). The Schedule 14D-1 and the Schedule 13E-3 shall contain or
shall incorporate by reference an offer to purchase (the "Offer to Purchase")
and forms of the related letter of transmittal and any related summary
advertisement (the Schedule 14D-1, the Schedule 13E-3, the Offer to Purchase and
such other documents, together with all supplements and amendments thereto,
being referred to herein collectively as the "Offer Documents"). Parent,
Purchaser and the Company agree to correct promptly any information provided by
any of them for use in the Offer Documents which shall have become false or
misleading, and Parent and Purchaser further agree to take all steps necessary
to cause the Schedule 14D-1 and the Schedule 13E-3 as so corrected to be filed
with the SEC and the other Offer Documents as so corrected to be disseminated to
holders of Shares, in each case as and to the extent required by applicable
federal securities laws. The Company and its counsel shall be given the
opportunity to review and comment on the Offer Documents and any amendments
thereto prior to the filing thereof with the SEC. Parent and Purchaser shall
provide the Company and its counsel with a copy of any written comments or
telephonic notification of any verbal comments Parent or Purchaser may receive
from the SEC or its staff with respect to the Offer Documents promptly after the
receipt thereof and shall provide the Company and its counsel with a copy of any
written responses and telephonic notification of any verbal responses of Parent,
Purchaser or their counsel.

            SECTION 1.02. Company Action. (a) The Company hereby approves of and
consents to the Offer and represents that (i) a majority of the Independent
Directors approved the Offer and the Merger, (ii) the Board, at a meeting duly
called and held on January 10, 1997, has, by unanimous vote of all directors
present and voting (with all directors who are designees of Parent abstaining),
(A) determined that this Agreement and the Transactions, including each of the
Offer and the Merger, are fair to and in the best interests of the holders of
Shares (other than Parent and Purchaser), (B) approved and adopted this
Agreement and the Transactions and (C) recommended that the stockholders of the
Company accept the Offer and approve and adopt this Agreement and the
Transactions, and (iii) Lehman Brothers Inc. has delivered to the Independent
Directors and to the Board a written opinion that the consideration to be
received by the holders of Shares (other than
<PAGE>

                                      4

Parent and Purchaser) pursuant to each of the Offer and the Merger is fair to
the holders of Shares from a financial point of view. The Company hereby
consents to the inclusion in the Offer Documents of the recommendation of the
Board described in the immediately preceding sentence.

            (b) As soon as reasonably practicable on the date of commencement of
the Offer, the Company shall file with the SEC a Solicitation/Recommendation
Statement on Schedule 14D-9 (together with all amendments and supplements
thereto, the "Schedule 14D-9") containing the recommendation of the Board
described in Section 1.02(a) and shall disseminate the Schedule 14D-9 to the
extent required by Rule 14d-9 promulgated under the Securities Exchange Act of
1934, as amended (the "Exchange Act"), and any other applicable federal
securities laws. The Company, Parent and Purchaser agree to correct promptly any
information provided by any of them for use in the Schedule 14D-9 which shall
have become false or misleading, and the Company further agrees to take all
steps necessary to cause the Schedule 14D-9 as so corrected to be filed with the
SEC and disseminated to holders of Shares, in each case as and to the extent
required by applicable federal securities laws. Purchaser and its counsel shall
be given the opportunity to review and comment on the Schedule 14D-9 and any
amendments thereto prior to the filing thereof with the SEC. The Company shall
provide Purchaser and its counsel with a copy of any written comments or
telephonic notification of any verbal comments the Company may receive from the
SEC or its staff with respect to the Schedule 14D-9 promptly after the receipt
thereof and shall provide Purchaser and its counsel with a copy of any written
responses and telephonic notification of any verbal responses of the Company or
its counsel.

            (c) The Company shall promptly furnish Purchaser with mailing labels
containing the names and addresses of all record holders of Shares and with
security position listings of Shares held in stock depositories, each as of a
recent date, together with all other available listings and computer files
containing names, addresses and security position listings of record holders and
beneficial owners of Shares. The Company shall furnish Purchaser with such
additional information, including, without limitation, updated listings and
computer files of stockholders, mailing labels and security position listings,
and such other assistance as Parent, Purchaser or their agents may reasonably
request. Subject to the requirements of applicable law, and except for such
steps as are necessary to disseminate the Offer Documents and any other
documents necessary to consummate the Offer or the Merger, Parent and Purchaser
shall hold in confidence the information contained in such labels, listings and
files, shall use such information only in connection with the Offer and the
Merger, and, if this Agreement shall be terminated in accordance with Section
7.01, shall deliver to the Company all copies of such information then in their
possession.
<PAGE>

                                      5

                                  ARTICLE II

                                  THE MERGER

            SECTION 2.01. The Merger. Upon the terms and subject to the
conditions set forth in this Agreement, and in accordance with Delaware Law, at
the Effective Time (as hereinafter defined) Purchaser shall be merged with and
into the Company. As a result of the Merger, the separate corporate existence of
Purchaser shall cease and the Company shall continue as the surviving
corporation of the Merger (the "Surviving Corporation").

            SECTION 2.02. Effective Time; Closing. As promptly as practicable
after the satisfaction or, if permissible, waiver of the conditions set forth in
Article VI, the parties hereto shall cause the Merger to be consummated by
filing this Agreement or a certificate of merger or certificate of ownership and
merger (in either case, the "Certificate of Merger") with the Secretary of State
of the State of Delaware, in such form as is required by, and executed in
accordance with the relevant provisions of, Delaware Law (the date and time of
such filing being the "Effective Time"). Prior to such filing, a closing shall
be held at the offices of Shearman & Sterling, 599 Lexington Avenue, New York,
New York 10022, or such other place as the parties shall agree, for the purpose
of confirming the satisfaction or waiver, as the case may be, of the conditions
set forth in Article VI.

            SECTION 2.03. Effect of the Merger. At the Effective Time, the
effect of the Merger shall be as provided in the applicable provisions of
Delaware Law. Without limiting the generality of the foregoing, and subject
thereto, at the Effective Time all the property, rights, privileges, powers and
franchises of the Company and Purchaser shall vest in the Surviving Corporation,
and all debts, liabilities, obligations, restrictions, disabilities and duties
of the Company and Purchaser shall become the debts, liabilities, obligations,
restrictions, disabilities and duties of the Surviving Corporation.

            SECTION 2.04. Certificate of Incorporation; By-laws. (a) At the
Effective Time the Certificate of Incorporation of Purchaser previously
delivered to the Company shall be the Certificate of Incorporation of the
Surviving Corporation until thereafter amended as provided by law and such
Certificate of Incorporation; provided, however, that, at the Effective Time,
Article I of the Certificate of Incorporation of the Surviving Corporation shall
be amended to read as follows: "The name of the corporation is SyStemix, Inc."

            (b) At the Effective Time, the By-laws of Purchaser previously
delivered to the Company shall be the By-laws of the Surviving Corporation until
thereafter amended as provided by law, the Certificate of Incorporation of the
Surviving Corporation and such By-laws.
<PAGE>

                                      6

            SECTION 2.05. Directors and Officers. The directors of Purchaser
immediately prior to the Effective Time shall be the initial directors of the
Surviving Corporation, each to hold office in accordance with the Certificate of
Incorporation and By-laws of the Surviving Corporation, and the officers of the
Company immediately prior to the Effective Time shall be the initial officers of
the Surviving Corporation, in each case until their respective successors are
duly elected or appointed and qualified.

            SECTION 2.06. Conversion of Securities. At the Effective Time, by
virtue of the Merger and without any action on the part of Purchaser, the
Company or the holders of any of the following securities:

                  (a) Each Share issued and outstanding immediately prior to the
      Effective Time (other than any Shares to be cancelled pursuant to Section
      2.06(b) and any Dissenting Shares (as hereinafter defined)) shall be
      cancelled and shall be converted automatically into the right to receive
      an amount equal to the Per Share Amount in cash (the "Merger
      Consideration") payable, without interest, to the holder of such Share,
      upon surrender, in the manner provided in Section 2.09, of the certificate
      that formerly evidenced such Share;

                  (b) Each Share held in the treasury of the Company and each
      Share owned by Purchaser, Parent or any direct or indirect wholly owned
      subsidiary of Parent or of the Company immediately prior to the Effective
      Time shall be cancelled without any conversion thereof and no payment or
      distribution shall be made with respect thereto; and

                  (c) Each share of Common Stock, par value $.01 per share, of
      Purchaser issued and outstanding immediately prior to the Effective Time
      shall be converted into and exchanged for one validly issued, fully paid
      and nonassessable share of common stock, par value $.01 per share, of the
      Surviving Corporation.

            SECTION 2.07. Stock Options and Warrants. (a) Immediately prior to
the Effective Time, each outstanding option and warrant to purchase Shares (in
each case, an "Option"), whether or not then exercisable, may be surrendered by
the holder of such Option for cancellation by the Company, and each holder of a
cancelled Option shall be entitled to receive an amount in cash from Purchaser,
in consideration for the cancellation of each such Option, at the same time as
the Merger Consideration is received by the holders of Shares, equal to the
product of (i) the number of Shares to be issued upon the exercise of such
Option and (ii) the excess, if any, of the Per Share Amount over the exercise
price per Share previously subject to such Option; provided, however, that any
Options owned by Purchaser, Parent or any direct or indirect wholly owned
subsidiary of Parent or of the Company immediately prior to the Effective Time
shall be cancelled without any conversion thereof and no payment or distribution
shall be made with respect thereto.
<PAGE>

                                      7


            (b) The Company shall use all reasonable efforts to obtain such
consents as may be necessary or required so that, immediately prior to the
Effective Time, each Option may be and shall be cancelled by the Company.

            SECTION 2.08. Dissenting Shares. (a) Notwithstanding any provision
of this Agreement to the contrary, Shares that are outstanding immediately prior
to the Effective Time and which are held by stockholders who shall have not
voted in favor of the Merger or consented thereto in writing and who shall have
demanded properly in writing appraisal for such Shares in accordance with
Section 262 of Delaware Law (collectively, the "Dissenting Shares") shall not be
converted into or represent the right to receive the Merger Consideration. Such
stockholders shall be entitled to receive payment of the appraised value of such
Shares held by them in accordance with the provisions of such Section 262,
except that all Dissenting Shares held by stockholders who shall have failed to
perfect or who effectively shall have withdrawn or lost their rights to
appraisal of such Shares under such Section 262 shall thereupon be deemed to
have been converted into and to have become exchangeable for, as of the
Effective Time, the right to receive the Merger Consideration, without any
interest thereon, upon surrender, in the manner provided in Section 2.09, of the
certificate or certificates that formerly evidenced such Shares.

            (b) The Company shall give Parent (i) prompt notice of any demands
for appraisal received by the Company, withdrawals of such demands, and any
other instruments served pursuant to Delaware Law and received by the Company
and (ii) the opportunity to direct all negotiations and proceedings with respect
to demands for appraisal under Delaware Law. The Company shall not, except with
the prior written consent of Parent, make any payment with respect to any
demands for appraisal or offer to settle or settle any such demands.

            SECTION 2.09. Surrender of Shares; Stock Transfer Books. (a) Prior
to the Effective Time, Purchaser shall designate a bank or trust company to act
as agent (the "Paying Agent") for the holders of Shares in connection with the
Merger to receive the funds to which holders of Shares shall become entitled
pursuant to Section 2.06(a). Such funds shall be invested by the Paying Agent as
directed by the Surviving Corporation.

            (b) Promptly after the Effective Time, the Surviving Corporation
shall cause to be mailed to each person who was, at the Effective Time, a holder
of record of Shares entitled to receive the Merger Consideration pursuant to
Section 2.06(a) a form of letter of transmittal (which shall specify that
delivery shall be effected, and risk of loss and title to the certificates
evidencing such Shares (the "Certificates") shall pass, only upon proper
delivery of the Certificates to the Paying Agent) and instructions for use in
effecting the surrender of the Certificates pursuant to such letter of
transmittal. Upon surrender to the Paying Agent of a Certificate, together with
such letter of transmittal, duly completed and validly executed in accordance
with the instructions thereto, and such other documents as
<PAGE>

                                      8

may be required pursuant to such instructions, the holder of such Certificate
shall be entitled to receive in exchange therefor the Merger Consideration for
each Share formerly evidenced by such Certificate, and such Certificate shall
then be cancelled. No interest shall accrue or be paid on the Merger
Consideration payable upon the surrender of any Certificate for the benefit of
the holder of such Certificate. If payment of the Merger Consideration is to be
made to a person other than the person in whose name the surrendered Certificate
is registered on the stock transfer books of the Company, it shall be a
condition of payment that the Certificate so surrendered shall be endorsed
properly or otherwise be in proper form for transfer and that the person
requesting such payment shall have paid all transfer and other taxes required by
reason of the payment of the Merger Consideration to a person other than the
registered holder of the Certificate surrendered or shall have established to
the satisfaction of the Surviving Corporation that such taxes either have been
paid or are not applicable.

            (c) At any time following the sixth month after the Effective Time,
the Surviving Corporation shall be entitled to require the Paying Agent to
deliver to it any funds which had been made available to the Paying Agent and
not disbursed to holders of Shares (including, without limitation, all interest
and other income received by the Paying Agent in respect of all funds made
available to it), and thereafter such holders shall be entitled to look to the
Surviving Corporation (subject to abandoned property, escheat and other similar
laws) only as general creditors thereof with respect to any Merger Consideration
that may be payable upon due surrender of the Certificates held by them.
Notwithstanding the foregoing, neither the Surviving Corporation nor the Paying
Agent shall be liable to any holder of a Share for any Merger Consideration
delivered in respect of such Share to a public official pursuant to any
abandoned property, escheat or other similar law.

            (d) At the close of business on the day of the Effective Time, the
stock transfer books of the Company shall be closed and thereafter there shall
be no further registration of transfers of Shares on the records of the Company.
From and after the Effective Time, the holders of Shares outstanding immediately
prior to the Effective Time shall cease to have any rights with respect to such
Shares except as otherwise provided herein or by applicable law.

            SECTION 2.10. Withholding Rights. Purchaser or the Paying Agent
shall be entitled to deduct and withhold from the consideration otherwise
payable pursuant to this Agreement to any holder of Shares and/or an Option such
amounts that Purchaser or the Paying Agent is required to deduct and withhold
with respect to the making of such payment under the United States Internal
Revenue Code of 1986, as amended (the "Code"), the rules and regulations
promulgated thereunder or any provision of state, local or foreign tax law. To
the extent that amounts are so withheld by Purchaser or the Paying Agent, such
amounts shall be treated for all purposes of this Agreement as having been paid
to the holder of the
<PAGE>

                                      9

Shares and/or Option in respect of which such deduction and withholding was made
by Purchaser or the Paying Agent.

                                  ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

            The Company hereby represents and warrants to Parent and Purchaser
that:

            SECTION 3.01. Organization and Qualification; Subsidiaries. Each of
the Company and each subsidiary of the Company (a "Subsidiary") is a corporation
duly organized, validly existing and in good standing under the laws of the
jurisdiction of its organization and has the requisite power and authority and
all necessary governmental approvals to own, lease and operate its properties
and to carry on its business as it is now being conducted, except where the
failure to be so organized, existing or in good standing or to have such power,
authority and governmental approvals would not, individually or in the
aggregate, have a Material Adverse Effect (as defined below). The Company and
each Subsidiary is duly qualified or licensed as a foreign corporation to do
business, and is in good standing, in each jurisdiction where the character of
the properties owned, leased or operated by it or the nature of its business
makes such qualification or licensing necessary, except for such failures to be
so qualified or licensed and in good standing that would not, individually or in
the aggregate, have a Material Adverse Effect. When used in connection with the
Company or any Subsidiary, the term "Material Adverse Effect" means any change
or effect that, when taken together with all other adverse changes and effects
that are within the scope of the representations and warranties made by the
Company in this Agreement and which are not individually or in the aggregate
deemed to have a Material Adverse Effect, is or is reasonably likely to be
materially adverse to the business, operations, properties, condition (financial
or otherwise), assets or liabilities (including, without limitation, contingent
liabilities) or prospects of the Company and the Subsidiaries taken as a whole.

            SECTION 3.02. Certificate of Incorporation and By-laws. The Company
has heretofore furnished to Parent a complete and correct copy of the
Certificate of Incorporation and the By-laws or equivalent organizational
documents, each as amended to date, of the Company and each Subsidiary. Such
Certificates of Incorporation, By-laws or equivalent organizational documents
are in full force and effect, and neither the Company nor any Subsidiary is in
violation of any provision of its Certificate of Incorporation, By-laws or
equivalent organizational documents.

            SECTION 3.03. Capitalization. The authorized capital stock of the
Company consists of 30,000,000 Shares and 1,000,000 shares of preferred stock,
par value $.01 per share ("Company Preferred Stock"). As of the date hereof, (i)
14,500,094 Shares
<PAGE>

                                      10

are issued and outstanding, all of which are validly issued, fully paid and
nonassessable, (ii) no Shares are held in the treasury of the Company, (iii)
3,383,239 Shares are authorized for future issuance (with respect to which
options to acquire 2,016,378 Shares are issued and outstanding) pursuant to
employee stock options or stock incentive rights granted pursuant to the
Company's 1988 Stock Option Plan and 1991 Stock Option and Incentive Plan, and
(iv) 1,367,600 Shares are reserved for future issuance in connection with the
exercise of the Warrants (as such term is defined in the Stock and Warrant
Purchase Agreement, dated as of January 30, 1995, among Parent, Purchaser and
Company (the "Warrant Purchase Agreement")). As of the date hereof, no shares of
Company Preferred Stock are issued and outstanding. Except as contemplated by
this Agreement, there are no options, warrants or other rights, agreements,
arrangements or commitments of any character relating to the issued or unissued
capital stock of the Company or any Subsidiary or obligating the Company or any
Subsidiary to issue or sell any shares of capital stock of, or other equity
interests in, the Company or any Subsidiary. All Shares subject to issuance as
aforesaid, upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, will be duly authorized,
validly issued, fully paid and nonassessable. Except for obligations to
executives under currently existing employment agreements to make loans relating
to personal residences, there are no outstanding contractual obligations of the
Company or any Subsidiary to repurchase, redeem or otherwise acquire any Shares
or any capital stock of any Subsidiary or to provide funds to, or make any
investment (in the form of a loan, capital contribution or otherwise) in, any
person. Each outstanding share of capital stock of each Subsidiary is duly
authorized, validly issued, fully paid and nonassessable and each such share
owned by the Company or another Subsidiary is free and clear of all security
interests, liens, claims, pledges, options, rights of first refusal, agreements,
limitations on the Company's or such other Subsidiary's voting rights, charges
and other encumbrances of any nature whatsoever.

            SECTION 3.04. Authority Relative to this Agreement. The Company has
all necessary power and authority to execute and deliver this Agreement, to
perform its obligations hereunder and to consummate the Transactions. The
execution and delivery of this Agreement by the Company and the consummation by
the Company of the Transactions have been duly and validly authorized by all
necessary corporate action (including approval by a majority of the Independent
Directors as provided in the Acquisition Agreement) and no other corporate
proceedings on the part of the Company are necessary to authorize this Agreement
or to consummate the Transactions (other than, with respect to the Merger, the
approval and adoption of this Agreement by the holders of a majority of the then
outstanding Shares if and to the extent required by applicable law, and the
filing and recordation of appropriate merger documents as required by Delaware
Law). This Agreement has been duly and validly executed and delivered by the
Company and, assuming the due authorization, execution and delivery by Parent
and Purchaser, constitutes a legal, valid and binding obligation of the Company
enforceable against the Company in accordance with its
<PAGE>

                                      11

terms. The restrictions on business combinations contained in Section 203 of
Delaware Law have been satisfied with respect to the Transactions.

            SECTION 3.05. No Conflict; Required Filings and Consents. (a) The
execution and delivery of this Agreement by the Company do not, and the
performance of this Agreement by the Company will not, (i) conflict with or
violate the Certificate of Incorporation or By-laws or equivalent organizational
documents of the Company or any Subsidiary, (ii) conflict with or violate any
law, rule, regulation, order, judgment or decree applicable to the Company or
any Subsidiary or by which any property or asset of the Company or any
Subsidiary is bound or affected, or (iii) result in any breach of or constitute
a default (or an event which with notice or lapse of time or both would become a
default) under, or give to others any right of termination, amendment,
acceleration or cancellation of, or result in the creation of a lien or other
encumbrance on any property or asset of the Company or any Subsidiary pursuant
to, any note, bond, mortgage, indenture, contract, agreement, lease, license,
permit, franchise or other instrument or obligation to which the Company or any
Subsidiary is a party or by which the Company or any Subsidiary or any property
or asset of either of them is bound or affected, except for any such conflicts,
violations, breaches, defaults or other occurrences which would not,
individually or in the aggregate have a Material Adverse Effect, or prevent or
materially delay the performance by the Company of any of its obligations under
this Agreement or the consummation of any of the Transactions.

            (b) The execution and delivery of this Agreement by the Company do
not, and the performance of this Agreement by the Company will not, require any
consent, approval, authorization or permit of, or filing with or notification
to, any governmental or regulatory authority, domestic or foreign, except (i)
for applicable requirements, if any, of the Exchange Act, state securities or
"blue sky" laws ("Blue Sky Laws") and state takeover laws and filing and
recordation of appropriate merger documents as required by Delaware Law and (ii)
where failure to obtain such consents, approvals, authorizations or permits, or
to make such filings or notifications, would not, individually or in the
aggregate, have a Material Adverse Effect, or prevent or materially delay the
performance by the Company of any of its obligations under this Agreement or the
consummation of any of the Transactions.

            SECTION 3.06. Compliance. Neither the Company nor any Subsidiary is
in conflict with, or in default or violation of, (i) any law, rule, regulation,
order, judgment or decree applicable to the Company or any Subsidiary or by
which any property or asset of the Company or any Subsidiary is bound or
affected, or (ii) any note, bond, mortgage, indenture, contract, agreement,
lease, license, permit, franchise or other instrument or obligation to which the
Company or any Subsidiary is a party or by which the Company or any Subsidiary
or any property or asset of the Company or any Subsidiary is bound or affected,
except for any such conflicts, defaults or violations that would
not,individually or in the aggregate, have a Material Adverse Effect, or prevent
or materially delay the
<PAGE>

                                      12

performance by the Company of any of its obligations under this Agreement or the
consummation of any of the Transactions.

            SECTION 3.07. SEC Filings; Financial Statements. (a) The Company has
filed all forms, reports and documents required to be filed by it with the SEC
since December 31, 1994, and has heretofore delivered to Parent, in the form
filed with the SEC, (i) its Annual Reports on Form 10-K for the fiscal years
ended December 31, 1994 and 1995, respectively, (ii) its Quarterly Reports on
Form 10-Q for the periods ended March 31, June 30 and September 30, 1996, (iii)
all proxy statements relating to the Company's meetings of stockholders (whether
annual or special) held since December 31, 1994, and (iv) all other forms,
reports and other registration statements (other than Quarterly Reports on Form
10-Q not referred to in clause (ii) above) filed by the Company with the SEC
since December 31, 1994 (the forms, reports and other documents referred to in
clauses (i), (ii), (iii) and (iv) above being referred to herein, collectively,
as the "SEC Reports"). The SEC Reports (i) were prepared in accordance with the
requirements of the Securities Act of 1933, as amended (the "Securities Act"),
and the Exchange Act, as the case may be, and the rules and regulations
thereunder and (ii) did not at the time they were filed contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements made therein, in the
light of the circumstances under which they were made, not misleading. No
Subsidiary is required to file any form, report or other document with the SEC.

            (b) Each of the consolidated financial statements (including, in
each case, any notes thereto) contained in the SEC Reports was prepared in
accordance with generally accepted accounting principles applied on a consistent
basis throughout the periods indicated (except as may be indicated in the notes
thereto) and each fairly presented the consolidated financial position, results
of operations and changes in financial position of the Company and the
consolidated Subsidiaries as at the respective dates thereof and for the
respective periods indicated therein.

            (c) Except as and to the extent set forth on the consolidated
balance sheet of the Company and the consolidated Subsidiaries at December 31,
1995, including the notes thereto, included in the Company's Annual Report on
Form 10-K for the fiscal year then ended, or on the unaudited consolidated
balance sheet of the Company and the consolidated Subsidiaries at September 30,
1996, including the notes thereto, included in the Company's Quarterly Report on
Form 10-Q for the period then ended, the Company and the consolidated
Subsidiaries have no liability or obligation of any nature (whether accrued,
absolute, contingent or otherwise) which would be required to be reflected on a
consolidated balance sheet, or in the notes thereto, prepared in accordance with
generally accepted accounting principles, except for liabilities and obligations
incurred in the ordinary course of business consistent with past practice since
September 30, 1996.
<PAGE>

                                      13

            SECTION 3.08. Offer Documents; Schedule 14D-9; Schedule 13E-3; Proxy
Statement. Neither the Schedule 14D-9 nor any information supplied by the
Company for inclusion in the Offer Documents or the Schedule 13E-3 shall, at the
respective times the Schedule 14D-9, the Offer Documents, the Schedule 13E-3 or
any amendments or supplements thereto are filed with the SEC or are first
published, sent or given to stockholders of the Company, as the case may be,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
made therein, in the light of the circumstances under which they are made, not
misleading. Neither the proxy statement to be sent to the stockholders of the
Company in connection with the Stockholders' Meeting (as hereinafter defined) or
the information statement to be sent to such stockholders, as appropriate (such
proxy statement or information statement, as amended or supplemented, being
referred to herein as the "Proxy Statement"), shall, at the date the Proxy
Statement (or any amendment or supplement thereto) is first mailed to
stockholders of the Company, at the time of the Stockholders' Meeting and at the
Effective Time, be false or misleading with respect to any material fact, or
omit to state any material fact required to be stated therein or necessary in
order to make the statements made therein, in the light of the circumstances
under which they are made, not misleading or necessary to correct any statement
in any earlier communication with respect to the solicitation of proxies for the
Stockholders' Meeting which shall have become false or misleading.
Notwithstanding the foregoing, the Company makes no representation or warranty
with respect to any information supplied by Parent, Purchaser or any of their
representatives which is contained in any of the foregoing documents. The
Schedule 14D-9 and the Proxy Statement shall comply in all material respects as
to form with the requirements of the Exchange Act and the rules and regulations
thereunder.

            SECTION 3.09. Brokers. No broker, finder or investment banker (other
than Lehman Brothers Inc.) is entitled to any brokerage, finder's or other fee
or commission in connection with the Transactions based upon arrangements made
by or on behalf of the Company. The Company has heretofore furnished to Parent a
complete and correct copy of all agreements between the Company and Lehman
Brothers Inc. pursuant to which such firm would be entitled to any payment
relating to the Transactions.

                                  ARTICLE IV

            REPRESENTATIONS AND WARRANTIES OF PARENT AND PURCHASER

            Parent and Purchaser hereby, jointly and severally, represent and
warrant to the Company that:

            SECTION 4.01. Corporate Organization. Each of Parent and Purchaser
is a corporation duly organized, validly existing and in good standing under the
laws of the jurisdiction of its organization.
<PAGE>

                                      14


            SECTION 4.02. Authority Relative to this Agreement. Each of Parent
and Purchaser has all necessary corporate power and authority to execute and
deliver this Agreement, to perform its obligations hereunder and to consummate
the Transactions. The execution and delivery of this Agreement by Parent and
Purchaser and the consummation by Parent and Purchaser of the Transactions have
been duly and validly authorized by all necessary corporate action and no other
corporate proceedings on the part of Parent or Purchaser are necessary to
authorize this Agreement or to consummate the Transactions (other than, with
respect to the Merger, the filing and recordation of appropriate merger
documents as required by Delaware Law). This Agreement has been duly and validly
executed and delivered by Parent and Purchaser and, assuming the due
authorization, execution and delivery by the Company, constitutes a legal, valid
and binding obligation of each of Parent and Purchaser enforceable against each
of Parent and Purchaser in accordance with its terms.

            SECTION 4.03. No Conflict; Required Filings and Consents. (a) The
execution and delivery of this Agreement by Parent and Purchaser do not, and the
performance of this Agreement by Parent and Purchaser will not, (i) conflict
with or violate the Certificate of Incorporation or By-laws of either Parent or
Purchaser, (ii) conflict with or violate any law, rule, regulation, order,
judgment or decree applicable to Parent or Purchaser or by which any property or
asset of either of them is bound or affected, or (iii) result in any breach of
or constitute a default (or an event which with notice or lapse of time or both
would become a default) under, or give to others any rights of termination,
amendment, acceleration or cancellation of, or result in the creation of a lien
or other encumbrance on any property or asset of Parent or Purchaser pursuant
to, any note, bond, mortgage, indenture, contract, agreement, lease, license,
permit, franchise or other instrument or obligation to which Parent or Purchaser
is a party or by which Parent or Purchaser or any property or asset of either of
them is bound or affected, except for any such conflicts, violations, breaches,
defaults or other occurrences which would not prevent or materially delay the
performance by Parent or Purchaser of any of its obligations under this
Agreement or the consummation of any of the Transactions.

            (b) The execution and delivery of this Agreement by Parent and
Purchaser do not, and the performance of this Agreement by Parent and Purchaser
will not, require any consent, approval, authorization or permit of, or filing
with or notification to, any governmental or regulatory authority, domestic or
foreign, except (i) for applicable requirements, if any, of the Exchange Act,
Blue Sky Laws and state takeover laws, and filing and recordation of appropriate
merger documents as required by Delaware Law and (ii) where failure to obtain
such consents, approvals, authorizations or permits, or to make such filings or
notifications, would not prevent or materially delay the performance by Parent
or Purchaser of any of its obligations under this Agreement or the consummation
of any of the Transactions.
<PAGE>

                                      15

            SECTION 4.04. Offer Documents; Proxy Statement. The Offer Documents
will not, at the time the Offer Documents are filed with the SEC or are first
published, sent or given to stockholders of the Company, as the case may be,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
made therein, in the light of the circumstances under which they are made, not
misleading. The information supplied by Parent for inclusion in the Proxy
Statement will not, on the date the Proxy Statement (or any amendment or
supplement thereto) is first mailed to stockholders of the Company, at the time
of the Stockholders' Meeting and at the Effective Time, contain any statement
which, at such time and in light of the circumstances under which it is made, is
false or misleading with respect to any material fact, or omit to state any
material fact required to be stated therein or necessary in order to make the
statements therein not false or misleading or necessary to correct any statement
in any earlier communication with respect to the solicitation of proxies for the
Stockholders' Meeting which shall have become false or misleading.
Notwithstanding the foregoing, Parent and Purchaser make no representation or
warranty with respect to any information supplied by the Company or any of its
representatives which is contained in any of the foregoing documents or the
Offer Documents. The Offer Documents shall comply in all material respects as to
form with the requirements of the Exchange Act and the rules and regulations
thereunder.

            SECTION 4.05. Brokers. No broker, finder or investment banker (other
than Morgan Stanley & Co. Incorporated) is entitled to any brokerage, finder's
or other fee or commission in connection with the Transactions based upon
arrangements made by or on behalf of Parent or Purchaser.

                                   ARTICLE V

                                   COVENANTS

            SECTION 5.01. Conduct of the Business Pending the Merger. The
Company covenants and agrees that, between the date of this Agreement and the
Effective Time, unless Parent shall otherwise agree in writing, the businesses
of the Company and the Subsidiaries shall be conducted only in, and the Company
and the Subsidiaries shall not take any action except in, the ordinary course of
business and in a manner consistent with past practice; and the Company shall
use its best efforts to preserve substantially intact the business organization
of the Company and the Subsidiaries, to keep available the services of the
current officers, employees and consultants of the Company and the Subsidiaries
and to preserve the current relationships of the Company and the Subsidiaries
with customers, suppliers and other persons with which the Company or any
Subsidiary has significant business relations.
<PAGE>

                                      16

            SECTION 5.02. Stockholders' Meeting. (a) If required by applicable
law in order to consummate the Merger, the Company, acting through the Board,
shall, in accordance with applicable law and the Company's Certificate of
Incorporation and By-laws, (i) duly call, give notice of, convene and hold an
annual or special meeting of its stockholders as soon as practicable following
consummation of the Offer for the purpose of considering and taking action on
this Agreement and the Transactions (the "Stockholders' Meeting") and (ii)
include in the Proxy Statement the recommendation of the Board (with all
directors who are designees of Parent abstaining) that the stockholders of the
Company approve and adopt this Agreement and the Transactions. At the
Stockholders' Meeting, Parent and Purchaser shall cause all Shares then owned by
them and their subsidiaries to be voted in favor of the approval and adoption of
this Agreement and the Transactions.

            (b) Notwithstanding the foregoing, in the event that Purchaser shall
acquire such number of Shares that, when taken together with the Shares
previously owned by Purchaser, constitute at least 90 percent of the then
outstanding Shares, the parties hereto agree, subject to Article VI, to take all
necessary and appropriate action to cause the Merger to become effective, in
accordance with Section 253 of Delaware Law, as soon as reasonably practicable
after such acquisition, without a meeting of the stockholders of the Company.

            SECTION 5.03. Proxy Statement. If required by applicable law, as
soon as practicable following consummation of the Offer, the Company shall file
the Proxy Statement with the SEC under the Exchange Act, and shall use its best
efforts to have the Proxy Statement cleared by the SEC. Parent, Purchaser and
the Company shall cooperate with each other in the preparation of the Proxy
Statement, and the Company shall notify Parent of the receipt of any comments of
the SEC with respect to the Proxy Statement and of any requests by the SEC for
any amendment or supplement thereto or for additional information and shall
provide to Parent promptly copies of all correspondence between the Company or
any representative of the Company and the SEC. The Company shall give Parent and
its counsel the opportunity to review the Proxy Statement prior to its being
filed with the SEC and shall give Parent and its counsel the opportunity to
review all amendments and supplements to the Proxy Statement and all responses
to requests for additional information and replies to comments prior to their
being filed with, or sent to, the SEC. Each of the Company, Parent and Purchaser
agrees to use its reasonable best efforts, after consultation with the other
parties hereto, to respond promptly to all such comments of and requests by the
SEC and to cause the Proxy Statement and all required amendments and supplements
thereto to be mailed to the holders of Shares entitled to vote at the
Stockholders' Meeting at the earliest practicable time.

            SECTION 5.04. Access to Information; Confidentiality. (a) From the
date hereof to the Effective Time, the Company shall, and shall cause the
Subsidiaries and the officers, directors, employees, auditors and agents of the
Company and the Subsidiaries to, afford the officers, employees and agents of
Parent and Purchaser access at all reasonable
<PAGE>

                                      17

times to the officers, employees, agents, properties, offices, plants and other
facilities, books and records of the Company and each Subsidiary, and shall
furnish Parent and Purchaser with financial, operating and other data and
information as Parent or Purchaser, through its officers, employees or agents,
may reasonably request, in any case consistent with that currently available to
such persons and necessary to conduct the Offer and consummate the other
Transactions.

            (b) No investigation pursuant to this Section 5.04 shall affect any
representation or warranty in this Agreement of any party hereto or any
condition to the obligations of the parties hereto.

            (c) Information afforded or furnished to Parent or Purchaser by the
Company pursuant to this Section 5.04 shall be kept confidential and shall not
be disclosed to third parties except (i) with the consent of the Company, (ii)
as may be required by law, regulation or by legal process (including by
deposition, interrogatory, request for documents, subpoena, civil investigative
demand or similar process), or (iii) as may be necessary in connection with the
Transactions.

            SECTION 5.05. Directors' and Officers' Indemnification and
Insurance. (a) The By-laws of the Surviving Corporation shall contain provisions
no less favorable with respect to indemnification than are set forth in Article
XV of the By-laws of the Company, which provisions shall not be amended,
repealed or otherwise modified for a period of six years from the Effective Time
in any manner that would affect adversely the rights thereunder of individuals
who at the Effective Time were directors, officers, employees, fiduciaries or
agents of the Company, unless such modification shall be required by law.

            (b) The Company shall, to the fullest extent permitted under
applicable law and regardless of whether the Merger becomes effective, indemnify
and hold harmless, and, after the Effective Time, the Surviving Corporation
shall, to the fullest extent permitted under applicable law, indemnify and hold
harmless, each present and former director, officer, employee, fiduciary and
agent of the Company and each Subsidiary and each fiduciary and agent of each
such director and officer (collectively, the "Indemnified Parties") against all
costs and expenses (including attorneys' fees), judgments, fines, losses,
claims, damages, liabilities and settlement amounts paid in connection with any
claim, action, suit, proceeding or investigation (whether arising before or
after the Effective Time), whether civil, criminal, administrative or
investigative, arising out of or pertaining to any action or omission in their
capacity as an officer, director, employee, fiduciary or agent, whether
occurring before or after the Effective Time, until the expiration of the
statute of limitations relating thereto (and shall pay any expenses in advance
of the final disposition of such action or proceeding to each Indemnified Party
to the fullest extent permitted under Delaware Law, upon receipt from the
Indemnified Party to whom expenses are advanced of any undertaking to repay such
advances required under Delaware Law). In the event of any such claim,
<PAGE>

                                      18

action, suit, proceeding or investigation, (i) the Company or the Surviving
Corporation, as the case may be, shall pay the reasonable fees and expenses of
counsel selected by the Indemnified Parties, which counsel shall be reasonably
satisfactory to the Company or the Surviving Corporation, promptly after
statements therefor are received and (ii) the Company and the Surviving
Corporation shall cooperate in the defense of any such matter; provided,
however, that neither the Company nor the Surviving Corporation shall be liable
for any settlement effected without its written consent (which consent shall not
be unreasonably withheld); and provided, further, that neither the Company nor
the Surviving Corporation shall be obligated pursuant to this Section 5.05(b) to
pay the fees and expenses of more than one counsel (plus appropriate local
counsel) for all Indemnified Parties in any single action except (x) that the
persons who served as directors of the Company who were not designees of Parent
shall be entitled to retain one additional counsel (plus appropriate local
counsel) to represent them at the expense of the Company or the Surviving
Corporation, and (y) to the extent that two or more of such Indemnified Parties
shall have conflicting interests in the outcome of such action, in which case
such additional counsel (including local counsel) as may be required to avoid
any such conflict or likely conflict may be retained by the Indemnified Parties
at the expense of the Company or the Surviving Corporation; and provided further
that, in the event that any claim for indemnification is asserted or made within
the period prior to the expiration of the applicable statute of limitations, all
rights to indemnification in respect of such claim shall continue until the
disposition of such claim. Parent hereby agrees to guarantee the obligations of
the Surviving Corporation and, following consummation of the Offer, the Company,
under this Section 5.05(b).

            (c) The Surviving Corporation shall use its reasonable efforts to
maintain in effect for six years from the Effective Time, if available, the
current directors' and officers' liability insurance policies maintained by the
Company (provided that the Surviving Corporation may substitute therefor
policies of at least the same coverage containing terms and conditions which are
not materially less favorable) with respect to matters occurring prior to the
Effective Time; provided, however, that in no event shall the Surviving
Corporation be required to expend pursuant to this Section 5.05(c) more than an
amount per year equal to 175% of current annual premiums paid by the Company for
such insurance. In the event that, but for the proviso to the immediately
preceding sentence, the Surviving Corporation would be required to expend more
than 175% of current annual premiums, the Surviving Corporation shall obtain the
maximum amount of such insurance obtainable by payment of annual premiums equal
to 175% of current annual premiums.

            (d) In the event the Company or the Surviving Corporation or any of
their respective successors or assigns (i) consolidates with or merges into any
other person and shall not be the continuing or surviving corporation or entity
of such consolidation or merger or (ii) transfers all or substantially all of
its properties and assets to any person, then, and in each such case, proper
provision shall be made so that the successors and assigns of the
<PAGE>

                                      19

Company or the Surviving Corporation, as the case may be, or at Parent's option,
Parent, shall assume the obligations set forth in this Section 5.05.

            SECTION 5.06. Notification of Certain Matters. The Company shall
give prompt notice to Parent, and Parent shall give prompt notice to the
Company, of (i) the occurrence, or nonoccurrence, of any event the occurrence,
or nonoccurrence, of which would be likely to cause any representation or
warranty contained in this Agreement to be untrue or inaccurate and (ii) any
failure of the Company, Parent or Purchaser, as the case may be, to comply with
or satisfy any covenant, condition or agreement to be complied with or satisfied
by it hereunder; provided, however, that the delivery of any notice pursuant to
this Section 5.06 shall not limit or otherwise affect the remedies available
hereunder to the party receiving such notice.

            SECTION 5.07. Further Action; Reasonable Best Efforts. Upon the
terms and subject to the conditions hereof, each of the parties hereto shall (i)
use its reasonable best efforts to take, or cause to be taken, all appropriate
action, and to do, or cause to be done, all things necessary, proper or
advisable under applicable laws and regulations to consummate and make effective
the Transactions, including, without limitation, using its reasonable best
efforts to obtain all licenses, permits, consents, approvals, authorizations,
qualifications and orders of governmental authorities and parties to contracts
with the Company and the Subsidiaries as are necessary for the consummation of
the Transactions and to fulfill the conditions to the Offer and the Merger. In
case at any time after the Effective Time any further action is necessary or
desirable to carry out the purposes of this Agreement, the proper officers and
directors of each party to this Agreement and the Surviving Corporation shall
use their reasonable best efforts to take all such action.

            SECTION 5.08. Public Announcements. Parent and the Company shall
consult with each other before issuing any press release or otherwise making any
public statements with respect to this Agreement or any Transaction and shall
not issue any such press release or make any such public statement prior to such
consultation, except as may be required by law or any listing agreement with a
national securities exchange to which Parent or the Company is a party.

            SECTION 5.09. Termination of Agreements. The parties hereto hereby
agree that each of the Acquisition Agreement and the Warrant Purchase Agreement
shall be terminated as of the Effective Time. For purposes of clarity, it is
understood by the parties hereto that all representations, warranties and
agreements between the parties which, by the terms of such agreements, survive
either or both the Closing Date (as that term is defined in each of the
Acquisition Agreement and the Warrant Purchase Agreement) or the termination of
such agreements shall all be terminated as of the Effective Time.
<PAGE>

                                      20

            SECTION 5.10. Financing. Parent shall ensure that Purchaser has
sufficient funds to acquire all the outstanding Shares in the Offer and the
Merger.

                                  ARTICLE VI

                           CONDITIONS TO THE MERGER

            SECTION 6.01. Conditions to the Merger. The respective obligations
of each party to effect the Merger shall be subject to the satisfaction at or
prior to the Effective Time of the following conditions:

                  (a) Stockholder Approval. This Agreement and the Transactions
      shall have been approved and adopted by the affirmative vote of the
      stockholders of the Company to the extent required by Delaware Law and the
      Certificate of Incorporation of the Company;

                  (b) No Order. No foreign, United States or state governmental
      authority or other agency or commission or foreign, United States or state
      court of competent jurisdiction shall have enacted, issued, promulgated,
      enforced or entered any law, rule, regulation, executive order, decree,
      injunction or other order (whether temporary, preliminary or permanent)
      which is then in effect and has the effect of: (i) making the acquisition
      of Shares by Parent or Purchaser or any affiliate of either of them
      illegal or otherwise restricting, preventing or prohibiting consummation
      of the Transactions, (ii) seeking to prohibit or limit materially the
      ownership or operation by the Company, Parent or any of their respective
      subsidiaries of all or any material portion of the business or assets of
      the Company, Parent or any of their respective subsidiaries as a result of
      the Transactions, or (iii) compelling the Company, Parent, Purchaser or
      any of their respective subsidiaries to dispose of or hold separate all or
      any material portion of the business or assets of the Company, Parent,
      Purchaser or any of their respective subsidiaries as a result of the
      Transactions; and

                  (c) Offer. Purchaser or its permitted assignee shall have
      purchased all Shares validly tendered and not withdrawn pursuant to the
      Offer; provided, however, that this condition shall not be applicable to
      the obligations of Parent or Purchaser if, in breach of this Agreement or
      the terms of the Offer, Purchaser fails to purchase any Shares validly
      tendered and not withdrawn pursuant to the Offer.
<PAGE>

                                      21

                                  ARTICLE VII

                       TERMINATION, AMENDMENT AND WAIVER

            SECTION 7.01. Termination. This Agreement may be terminated and the
Merger and the other Transactions may be abandoned at any time prior to the
Effective Time, notwithstanding any requisite approval and adoption of this
Agreement and the Transactions by the stockholders of the Company:

                  (a) By mutual written consent duly authorized by the Boards of
      Directors of Parent, Purchaser and the Company, if such termination is
      also approved by a majority of the Independent Directors; or

                  (b) By either Parent, Purchaser or the Company if (i) the
      Effective Time shall not have occurred on or before June 30, 1997;
      provided, however, that the right to terminate this Agreement under this
      Section 7.01(b) shall not be available to any party whose failure to
      fulfill any obligation under this Agreement has been the cause of, or
      resulted in, the failure of the Effective Time to occur on or before such
      date or (ii) any court of competent jurisdiction or other governmental
      authority shall have issued an order, decree, ruling or taken any other
      action restraining, enjoining or otherwise prohibiting the Merger and such
      order, decree, ruling or other action shall have become final and
      nonappealable; or

                  (c) By Parent if due to an occurrence or circumstance that
      would result in a failure to satisfy any condition set forth in Annex A
      hereto, Purchaser shall have (i) failed to commence the Offer within 60
      days following the date of this Agreement, (ii) terminated the Offer
      without having accepted any Shares for payment thereunder or (iii) failed
      to pay for Shares pursuant to the Offer within 90 days following the
      commencement of the Offer, unless such failure to pay for Shares shall
      have been caused by or resulted from the failure of Parent or Purchaser to
      perform in any material respect any material covenant or agreement of
      either of them contained in this Agreement or the material breach by
      Parent or Purchaser of any material representation or warranty of either
      of them contained in this Agreement; or

                  (d) By the Company, upon approval of the Board and a majority
      of the Independent Directors, if due to an occurrence or circumstance that
      would result in a failure to satisfy any of the conditions set forth in
      Annex A hereto, Purchaser shall have (i) failed to commence the Offer
      within 60 days following the date of this Agreement, (ii) terminated the
      Offer without having accepted any Shares for payment thereunder or (iii)
      failed to pay for Shares pursuant to the Offer within 90 days following
      the commencement of the Offer, unless such failure to pay for Shares shall
      have been caused by or resulted from the failure of the Company to perform
      in any
<PAGE>

                                      22

      material respect any material covenant or agreement of it contained in
      this Agreement or the material breach by the Company of any material
      representation or warranty of it contained in this Agreement; or

                  (e) By the Company, upon approval of the Board and a majority
      of the Independent Directors, if any representation or warranty of Parent
      and Purchaser in this Agreement which is qualified as to materiality shall
      not be true and correct or any such representation or warranty that is not
      so qualified shall not be true and correct in any material respect, in
      each case as if such representation or warranty was made as of such time
      on or after the date of this Agreement; or Parent or Purchaser shall have
      failed to perform in any material respect any obligation or to comply in
      any material respect with any agreement or covenant of Parent or Purchaser
      to be performed or complied with by it under this Agreement.

            SECTION 7.02. Effect of Termination. In the event of the termination
of this Agreement pursuant to Section 7.01, this Agreement shall forthwith
become void, and there shall be no liability on the part of any party hereto,
except (i) as set forth in Section 8.01 and (ii) nothing herein shall relieve
any party from liability for any breach hereof.

            SECTION 7.03. Amendment. This Agreement may be amended by the
parties hereto by action taken by or on behalf of their respective Boards of
Directors at any time prior to the Effective Time; provided, however, that,
after the approval and adoption of this Agreement and the Transactions by the
stockholders of the Company, no amendment may be made which would reduce the
amount or change the type of consideration into which each Share shall be
converted upon consummation of the Merger, imposes conditions to the Merger
other than set forth in Section 6.01 or would otherwise amend or change the
terms and conditions of the Merger in a manner materially adverse to the holders
of the Shares (other than Parent and its affiliates); and provided further that
such amendment shall be approved by a majority of the Independent Directors.
This Agreement may not be amended except by an instrument in writing signed by
the parties hereto.

            SECTION 7.04. Waiver. At any time prior to the Effective Time, any
party hereto may (i) extend the time for the performance of any obligation or
other act of any other party hereto, (ii) waive any inaccuracy in the
representations and warranties contained herein or in any document delivered
pursuant hereto and (iii) waive compliance with any agreement or condition
contained herein. Any such extension or waiver shall be valid if set forth in an
instrument in writing signed by the party or parties to be bound thereby and, in
the case of any extension or waiver by which the Company is to be bound, only if
approved by a majority of the Independent Directors.
<PAGE>

                                      23

                                 ARTICLE VIII

                              GENERAL PROVISIONS

            SECTION 8.01. Non-Survival of Representations, Warranties and
Agreements. The representations, warranties and agreements in this Agreement
shall terminate at the Effective Time or upon the termination of this Agreement
pursuant to Section 7.01, as the case may be, except that the agreements set
forth in Articles II and VIII and Section 5.05 shall survive the Effective Time
indefinitely.

            SECTION 8.02. Notices. All notices, requests, claims, demands and
other communications hereunder shall be in writing and shall be given (and shall
be deemed to have been duly given upon receipt) by delivery in person, by
telecopy or by registered or certified mail (postage prepaid, return receipt
requested) to the respective parties at the following addresses (or at such
other address for a party as shall be specified in a notice given in accordance
with this Section 8.02):

            if to Parent or Purchaser:

                  Novartis Corporation
                  608 Fifth Avenue
                  New York, New York  10020
                  Telecopier No:  (212) 957-8367
                  Attention:  General Counsel

            with a copy to:

                  Shearman & Sterling
                  599 Lexington Avenue
                  New York, New York  10022
                  Telecopier No:  (212) 848-7179
                  Attention:  David W. Heleniak, Esq.

            if to the Company:

                  SyStemix, Inc.
                  3155 Porter Drive
                  Palo Alto, California  94304
                  Telecopier No:  (415) 856-4919
                  Attention:  General Counsel
<PAGE>

                                      24

            with copies to:

                  Skadden Arps Slate Meagher & Flom LLP
                  919 Third Avenue
                  New York, New York  10022
                  Telecopier No:  (212) 735-2000
                  Attention:  Morris J. Kramer, Esq.

                  and

                  Shereff Friedman Hoffman & Goodman LLP
                  919 Third Avenue
                  New York, New York  10022
                  Telecopier No:  (212) 758-9500
                  Attention:  Jeffry Hoffman, Esq.

            SECTION 8.03. Certain Definitions. For purposes of this Agreement,
the term:

                  (a) "affiliate" of a specified person means a person who
      directly or indirectly through one or more intermediaries controls, is
      controlled by, or is under common control with, such specified person;

                  (b) "beneficial owner" with respect to any Shares means a
      person who shall be deemed to be the beneficial owner of such Shares (i)
      which such person or any of its affiliates or associates (as such term is
      defined in Rule 12b-2 promulgated under the Exchange Act) beneficially
      owns, directly or indirectly, (ii) which such person or any of its
      affiliates or associates has, directly or indirectly, (A) the right to
      acquire (whether such right is exercisable immediately or subject only to
      the passage of time), pursuant to any agreement, arrangement or
      understanding or upon the exercise of consideration rights, exchange
      rights, warrants or options, or otherwise, or (B) the right to vote
      pursuant to any agreement, arrangement or understanding or (iii) which are
      beneficially owned, directly or indirectly, by any other persons with whom
      such person or any of its affiliates or associates or person with whom
      such person or any of its affiliates or associates has any agreement,
      arrangement or understanding for the purpose of acquiring, holding, voting
      or disposing of any Shares;

                  (c) "business day" means any day on which the principal
      offices of the SEC in Washington, D.C. are open to accept filings, or, in
      the case of determining a date when any payment is due, any day on which
      banks are not required or authorized by law or executive order to close in
      the City of New York;
<PAGE>

                                      25

                  (d) "control" (including the terms "controlled by" and "under
      common control with") means the possession, directly or indirectly or as
      trustee or executor, of the power to direct or cause the direction of the
      management and policies of a person, whether through the ownership of
      voting securities, as trustee or executor, by contract or credit
      arrangement or otherwise;

                  (e) "person" means an individual, corporation, partnership,
      limited partnership, limited liability company, syndicate, person
      (including, without limitation, a "person" as defined in Section 13(d)(3)
      of the Exchange Act), trust, association or entity or government,
      political subdivision, agency or instrumentality of a government; and

                  (f) "subsidiary" or "subsidiaries" of the Company, the
      Surviving Corporation, Parent or any other person means an affiliate
      controlled by such person, directly or indirectly, through one or more
      intermediaries.

            SECTION 8.04. Severability. If any term or other provision of this
Agreement is invalid, illegal or incapable of being enforced by any rule of law,
or public policy, all other conditions and provisions of this Agreement shall
nevertheless remain in full force and effect so long as the economic or legal
substance of the Transactions is not affected in any manner materially adverse
to any party. Upon such determination that any term or other provision is
invalid, illegal or incapable of being enforced, the parties hereto shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in a mutually acceptable manner in
order that the Transactions be consummated as originally contemplated to the
fullest extent possible.

            SECTION 8.05. Entire Agreement; Assignment. This Agreement
constitutes the entire agreement among the parties with respect to the subject
matter hereof and supersedes all prior agreements and undertakings, both written
and oral, among the parties, or any of them, with respect to the subject matter
hereof. This Agreement shall not be assigned by operation of law or otherwise,
except that Parent and Purchaser may assign all or any of their rights and
obligations hereunder to any affiliate of Parent provided that no such
assignment shall relieve the assigning party of its obligations hereunder if
such assignee does not perform such obligations.

            SECTION 8.06. Parties in Interest. This Agreement shall be binding
upon and inure solely to the benefit of each party hereto, and nothing in this
Agreement, express or implied, is intended to or shall confer upon any other
person any right, benefit or remedy of any nature whatsoever under or by reason
of this Agreement, other than Section 5.05 (which is intended to be for the
benefit of the persons covered thereby and may be enforced by such persons).
<PAGE>

                                      26

            SECTION 8.07. Specific Performance. The parties hereto agree that
irreparable damage would occur in the event any provision of this Agreement was
not performed in accordance with the terms hereof and that the parties shall be
entitled to specific performance of the terms hereof, in addition to any other
remedy at law or in equity.

            SECTION 8.08. Fees and Expenses. (a) In the event that this
Agreement is terminated prior to consummation of the Merger, other than a
termination pursuant to Section 7.01(a) or (d) or a termination pursuant to
Section 7.01(b) or (c) which results from any representation or warranty of the
Company in this Agreement not being true and correct or the failure of the
Company to perform any obligation or to comply with any agreement or covenant of
the Company to be performed or complied with by it under this Agreement, then,
in any such event, Purchaser shall, and Parent shall cause Purchaser to, pay all
actual out-of-pocket fees and expenses incurred by the parties hereto, including
all fees and expenses payable to investment banking firms, counsel and
accountants, in connection with the structuring, negotiation, preparation,
execution and performance of this Agreement, as well as all printing and
advertising expenses.

            (b) Except as set forth in this Section 8.08, all costs and expenses
incurred in connection with this Agreement and the Transactions shall be paid by
the party incurring such costs and expenses, whether or not any Transaction is
consummated.

            SECTION 8.09. Governing Law. Except to the extent that Delaware Law
is mandatorily applicable to the Transactions, this Agreement shall be governed
by, and construed in accordance with, the laws of the State of New York. All
actions and proceedings arising out of or relating to this Agreement shall be
heard and determined in any New York state or federal court sitting in the City
of New York and the parties hereto hereby consent to the jurisdiction of such
courts in any such action or proceeding.

            SECTION 8.10. Headings. The descriptive headings contained in this
Agreement are included for convenience of reference only and shall not affect in
any way the meaning or interpretation of this Agreement.

            SECTION 8.11. Counterparts. This Agreement may be executed in one or
more counterparts, and by the different parties hereto in separate counterparts,
each of which when executed shall be deemed to be an original but all of which
taken together shall constitute one and the same agreement.
<PAGE>

                                      27

            IN WITNESS WHEREOF, Parent, Purchaser and the Company have caused
this Agreement to be executed as of the date first written above by their
respective officers thereunto duly authorized.

                 NOVARTIS INC.


                 By /s/Raymund Breu                     /s/Christoph Maeder
                    -------------------------------     ------------------------
                    Name:  Raymund Breu                 Christoph Maeder
                    Title: Chief Financial Officer      Corporate Counsel


                 NOVARTIS BIOTECH HOLDING
                 CORP.


                 By /s/Robert L. Thompson, Jr.
                    --------------------------------
                    Name:  Robert L. Thompson, Jr.
                    Title: Vice President and Secretary


                 SYSTEMIX, INC.


                 By /s/John J. Schwartz
                    --------------------------------
                    Name:  John J. Schwartz
                    Title: President and Chief Executive
                           Officer
<PAGE>

                                                                       ANNEX A

                             Conditions to the Offer

            Notwithstanding any other provision of the Offer, Purchaser shall
not be required to accept for payment or pay for any Shares tendered pursuant to
the Offer, and may terminate or amend the Offer and may postpone the acceptance
for payment of and payment for Shares tendered, if (i) the Second Minimum
Condition shall not have been satisfied or (ii) at any time on or after the date
of this Agreement, and prior to the acceptance for payment of Shares, any of the
following conditions shall exist:

                  (a) an order shall have been entered in any action or
      proceeding before any federal or state court or governmental agency or
      other regulatory body or a permanent injunction by any federal or state
      court of competent jurisdiction in the United States shall have been
      issued and remain in effect (i) making illegal the purchase of, or payment
      for, any Shares by Parent, Purchaser or any affiliate of Parent or
      Purchaser; (ii) otherwise preventing the consummation of any of the
      Transactions; (iii) imposing limitations on the ability of Parent,
      Purchaser or any affiliate of Parent or Purchaser to exercise effectively
      full rights of ownership of any Shares, including, without limitation, the
      right to vote any Shares acquired by Purchaser pursuant to the Offer on
      all matters properly presented to the Company's stockholders, which would
      effect a material diminution in the value of the Shares acquired by
      Purchaser;

                  (b) there shall have been any federal or state statute, rule
      or regulation enacted or promulgated on or after the date of the Offer
      that could reasonably be expected to result, directly or indirectly, in
      any of the consequences referred to in clauses (i) through (iii) of
      paragraph (a) above;

                  (c) any representation or warranty of the Company in this
      Agreement which is qualified as to materiality shall not be true and
      correct or any such representation or warranty that is not so qualified
      shall not be true and correct in any material respect, in each case as if
      such representation or warranty was made as of such time on or after the
      date of this Agreement;

                  (d) there shall have occurred and be remaining in effect (i)
      any general suspension of, or limitation on prices for, trading in
      securities of the Company on the NASDAQ National Market System, (ii) any
      material change in United States or Switzerland currency exchange rates or
      a suspension of, or limitation on, currency exchange markets in the United
      States or Switzerland, (iii) a declaration of a banking moratorium or any
      suspension of payments in respect of banks in the United States or
      Switzerland, (iv) a commencement of a war or armed hostilities or other
      national or international calamity directly or indirectly involving the
      United
<PAGE>

                                     A-2

      States or Switzerland or (v) in the case of any of the foregoing existing
      on the date hereof, a material acceleration or worsening thereof;

                  (e) this Agreement shall have been terminated in accordance
      with its terms; or

                  (f) Purchaser and the Company (with the approval of a majority
      of the Independent Directors) shall have agreed that Purchaser shall
      terminate the Offer or postpone the acceptance for payment of or payment
      for Shares thereunder;

which, in the reasonable judgment of Purchaser in any such case, and regardless
of the circumstances (including any action or inaction by Parent or any of its
affiliates) giving rise to any such condition, makes it inadvisable to proceed
with such acceptance for payment or payment.

            The foregoing conditions are for the sole benefit of Purchaser and
Parent and may be asserted by Purchaser or Parent regardless of the
circumstances giving rise to any such condition or may be waived by Purchaser or
Parent in whole or in part at any time and from time to time in their sole
discretion. The failure by Parent or Purchaser at any time to exercise any of
the foregoing rights shall not be deemed a waiver of any such right; the waiver
of any such right with respect to particular facts and other circumstances shall
not be deemed a waiver with respect to any other facts and circumstances; and
each such right shall be deemed an ongoing right that may be asserted at any
time and from time to time.


<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                                 SYSTEMIX, INC.
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                         NOVARTIS BIOTECH HOLDING CORP.
                      AN INDIRECT WHOLLY OWNED SUBSIDIARY
                                       OF
                                 NOVARTIS INC.
                                    --------
 
THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON FRIDAY,                       FEBRUARY 14, 1997, UNLESS THE OFFER IS
                                   EXTENDED.
                             ---------------------
 
THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY TENDERED
AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER (I) NOT LESS THAN A
 MAJORITY OF THE ISSUED AND OUTSTANDING SHARES OTHER THAN SHARES OWNED BY
  NOVARTIS INC. ("PARENT") OR NOVARTIS BIOTECH HOLDING CORP. ("PURCHASER")
    (THE "FIRST MINIMUM CONDITION") AND (II) AT LEAST THE NUMBER OF SHARES
     THAT WHEN ADDED TO THE SHARES OWNED BY PARENT AND PURCHASER SHALL
     CONSTITUTE 90% OF THE SHARES THEN OUTSTANDING (THE "SECOND MINIMUM
       CONDITION"). THE FIRST MINIMUM CONDITION MAY NOT BE WAIVED WITHOUT
       THE CONSENT OF A MAJORITY OF THE INDEPENDENT DIRECTORS (AS DEFINED
       BELOW). PURCHASER HAS AGREED TO WAIVE THE SECOND MINIMUM
        CONDITION UNDER                  CERTAIN CIRCUMSTANCES
                               DESCRIBED HEREIN.
                             ---------------------
 
THE BOARD OF DIRECTORS OF SYSTEMIX, INC., BY UNANIMOUS VOTE OF ALL DIRECTORS
PRESENT AND VOTING (WITH ALL DIRECTORS WHO ARE DESIGNEES OF PARENT ABSTAINING),
 BASED UPON, AMONG OTHER THINGS, THE UNANIMOUS RECOMMENDATION AND APPROVAL OF
  THE DIRECTORS OF THE COMPANY WHO ARE NOT OFFICERS OR DIRECTORS OF PARENT
    OR PURCHASER NOR OFFICERS OR CONSULTANTS OF THE COMPANY (THE
     "INDEPENDENT DIRECTORS"), HAS DETERMINED THAT EACH OF THE OFFER AND
     THE MERGER (AS DEFINED HEREIN) IS FAIR TO, AND IN THE BEST INTERESTS
       OF, THE STOCKHOLDERS OF SYSTEMIX, INC. (OTHER THAN PARENT AND
       PURCHASER), AND RECOMMENDS THAT STOCKHOLDERS ACCEPT THE OFFER AND
                  TENDER THEIR SHARES PURSUANT TO THE OFFER.
                             ---------------------
 
                                   IMPORTANT
 
    ANY STOCKHOLDER DESIRING TO TENDER ALL OR ANY PORTION OF SUCH STOCKHOLDER'S
SHARES OF COMMON STOCK, PAR VALUE $.01 PER SHARE (THE "COMMON STOCK"), OF
SYSTEMIX, INC. (THE "SHARES") SHOULD EITHER (1) COMPLETE AND SIGN THE LETTER OF
TRANSMITTAL (OR A FACSIMILE THEREOF) IN ACCORDANCE WITH THE INSTRUCTIONS IN THE
LETTER OF TRANSMITTAL AND MAIL OR DELIVER IT TOGETHER WITH THE CERTIFICATE(S)
EVIDENCING TENDERED SHARES, AND ANY OTHER REQUIRED DOCUMENTS, TO THE DEPOSITARY
OR TENDER SUCH SHARES PURSUANT TO THE PROCEDURE FOR BOOK-ENTRY TRANSFER SET
FORTH IN "THE TENDER OFFER -- SECTION 3. PROCEDURES FOR ACCEPTING THE OFFER AND
TENDERING SHARES" OR (2) REQUEST SUCH STOCKHOLDER'S BROKER, DEALER, COMMERCIAL
BANK, TRUST COMPANY OR OTHER NOMINEE TO EFFECT THE TRANSACTION FOR SUCH
STOCKHOLDER. ANY STOCKHOLDER WHOSE SHARES ARE REGISTERED IN THE NAME OF A
BROKER, DEALER, COMMERCIAL BANK, TRUST COMPANY OR OTHER NOMINEE MUST CONTACT
SUCH BROKER, DEALER, COMMERCIAL BANK, TRUST COMPANY OR OTHER NOMINEE IF SUCH
STOCKHOLDER DESIRES TO TENDER SUCH SHARES.
 
    ANY STOCKHOLDER WHO DESIRES TO TENDER SHARES AND WHOSE CERTIFICATES
EVIDENCING SUCH SHARES ARE NOT IMMEDIATELY AVAILABLE, OR WHO CANNOT COMPLY WITH
THE PROCEDURE FOR BOOK-ENTRY TRANSFER ON A TIMELY BASIS, MAY TENDER SUCH SHARES
BY FOLLOWING THE PROCEDURE FOR GUARANTEED DELIVERY SET FORTH IN "THE TENDER
OFFER -- SECTION 3. PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES".
 
    QUESTIONS OR REQUESTS FOR ASSISTANCE MAY BE DIRECTED TO THE INFORMATION
AGENT OR THE DEALER MANAGER AT THEIR RESPECTIVE ADDRESSES AND TELEPHONE NUMBERS
SET FORTH ON THE BACK COVER OF THIS OFFER TO PURCHASE. ADDITIONAL COPIES OF THIS
OFFER TO PURCHASE, THE LETTER OF TRANSMITTAL AND THE NOTICE OF GUARANTEED
DELIVERY MAY ALSO BE OBTAINED FROM THE INFORMATION AGENT OR FROM BROKERS,
DEALERS, COMMERCIAL BANKS OR TRUST COMPANIES.
                             ---------------------
  THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION PASSED UPON
 THE FAIRNESS OR MERITS OF SUCH TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY
   OF THE INFORMATION CONTAINED IN THIS DOCUMENT. ANY REPRESENTATION TO THE
                             CONTRARY IS UNLAWFUL.
                             ---------------------
 
                      THE DEALER MANAGER FOR THE OFFER IS
                              MORGAN STANLEY & CO.
 
       INCORPORATED
 
JANUARY 17, 1997
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<S>                                                                                     <C>
INTRODUCTION..........................................................................          1
 
SPECIAL FACTORS.......................................................................          3
  Background of the Offer and the Merger..............................................          3
  Recommendation of the Company's Board; Fairness of the Offer and the Merger.........          4
  Recommendation of the Company's Board...............................................          4
  Fairness of the Offer and the Merger................................................          5
  Opinion of Lehman Brothers Inc. ....................................................          6
  Company Financial Projections.......................................................         12
  Position of Parent and Purchaser Regarding Fairness of the Offer and the Merger.....         13
  Analysis of Financial Advisor to Parent.............................................         13
  Purpose and Structure of the Offer and the Merger; Reasons of Parent and Purchaser
    for the Offer and the Merger......................................................         16
  Plans for the Company After the Offer and the Merger; Certain Effects of the
    Offer.............................................................................         17
  Rights of Stockholders in the Merger................................................         18
  The Merger Agreement................................................................         18
  Interests of Certain Persons in the Offer and the Merger............................         24
  Beneficial Ownership of Common Stock................................................         25
  Related Party Transactions..........................................................         26
  Fees and Expenses...................................................................         27
 
THE TENDER OFFER......................................................................         28
   1. Terms of the Offer; Expiration Date.............................................         28
   2. Acceptance for Payment and Payment for Shares...................................         29
   3. Procedures for Accepting the Offer and Tendering Shares.........................         30
   4. Withdrawal Rights...............................................................         32
   5. Certain Federal Income Tax Consequences.........................................         33
   6. Price Range of Shares; Dividends................................................         34
   7. Certain Information Concerning the Company......................................         34
   8. Certain Information Concerning Purchaser and Parent.............................         37
   9. Financing of the Offer and the Merger...........................................         38
  10. Dividends and Distributions.....................................................         38
  11. Effect of the Offer on the Market for the Shares; NASDAQ Quotation and Exchange
       Act Registration...............................................................         38
  12. Certain Conditions of the Offer.................................................         39
  13. Certain Legal Matters and Regulatory Approvals..................................         41
  14. Fees and Expenses...............................................................         42
  15. Miscellaneous...................................................................         43
</TABLE>
 
<TABLE>
<S>              <C>                                                                   <C>
SCHEDULE I.      Directors and Executive Officers of Parent and Purchaser............        I-1
SCHEDULE II.     Opinion of Lehman Brothers Inc. ....................................       II-1
SCHEDULE III.    Summary of Stockholder Appraisal Rights and Text of Section 262 of
                   the General Corporation Law of the State of Delaware..............      III-1
SCHEDULE IV.     Audited Financial Statements (and Related Notes) for the Company for
                   the Years Ended December 31, 1994 and December 31, 1995...........       IV-1
SCHEDULE V.      Unaudited Financial Statements (and Related Notes) for the Company
                   for the Period Ended September 30, 1996...........................        V-1
</TABLE>
<PAGE>
To the Holders of Common Stock of
  SyStemix, Inc.:
 
                                  INTRODUCTION
 
    Novartis Biotech Holding Corp., a Delaware corporation formerly known as
Sandoz Biotech Holdings Corporation ("Purchaser") and an indirect wholly owned
subsidiary of Novartis Inc., a corporation organized under the laws of
Switzerland ("Parent"), hereby offers to purchase all outstanding shares (the
"Shares") of common stock, par value $.01 per share (the "Common Stock"), of
SyStemix, Inc., a Delaware corporation (the "Company"), at a price of $19.50 per
Share, net to the seller in cash, upon the terms and subject to the conditions
set forth in this Offer to Purchase and in the related Letter of Transmittal
(which together constitute the "Offer"). Parent is the successor by merger to
Sandoz Ltd. resulting from the merger of Sandoz Ltd. and Ciba-Geigy Limited into
Parent.
 
    Tendering stockholders will not be obligated to pay brokerage fees or
commissions or, except as otherwise provided in Instruction 6 of the Letter of
Transmittal, stock transfer taxes with respect to the purchase of Shares by
Purchaser pursuant to the Offer. Purchaser will pay all charges and expenses of
Morgan Stanley & Co. Incorporated ("Morgan Stanley"), which is acting as Dealer
Manager for the Offer (in such capacity, the "Dealer Manager"), ChaseMellon
Shareholder Services, L.L.C. (the "Depositary") and Georgeson & Company Inc.
(the "Information Agent") incurred in connection with the Offer. See "THE TENDER
OFFER -- Section 14. Fees and Expenses".
 
    THE BOARD OF DIRECTORS OF THE COMPANY (THE "BOARD"), BY UNANIMOUS VOTE OF
ALL DIRECTORS PRESENT AND VOTING (WITH ALL DIRECTORS WHO ARE DESIGNEES OF PARENT
ABSTAINING), BASED UPON, AMONG OTHER THINGS, THE UNANIMOUS RECOMMENDATION AND
APPROVAL OF THE DIRECTORS WHO ARE NOT OFFICERS OR DIRECTORS OF PARENT OR
PURCHASER NOR OFFICERS OR CONSULTANTS OF THE COMPANY (THE "INDEPENDENT
DIRECTORS"), HAS DETERMINED THAT EACH OF THE OFFER AND THE MERGER IS FAIR TO,
AND IN THE BEST INTERESTS OF, THE STOCKHOLDERS OF THE COMPANY (OTHER THAN
PURCHASER AND PARENT), AND RECOMMENDS THAT STOCKHOLDERS ACCEPT THE OFFER AND
TENDER THEIR SHARES PURSUANT TO THE OFFER.
 
    The Company has advised Parent that Lehman Brothers Inc. ("Lehman Brothers")
has delivered to the Board its written opinion that the $19.50 per Share cash
consideration to be offered to the stockholders of the Company in each of the
Offer and the Merger (as defined below) is fair to such stockholders (other than
Parent) from a financial point of view. See "SPECIAL FACTORS -- Opinion of
Lehman Brothers" for further information concerning the opinion of Lehman
Brothers.
 
    The Company has filed with the Securities and Exchange Commission (the
"Commission") a Solicitation/Recommendation Statement on Schedule 14D-9 (the
"Schedule 14D-9"), which is being mailed to stockholders herewith.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER (I) NOT LESS
THAN A MAJORITY OF THE ISSUED AND OUTSTANDING SHARES OTHER THAN SHARES OWNED BY
PARENT OR PURCHASER (THE "FIRST MINIMUM CONDITION") AND (II) AT LEAST THE NUMBER
OF SHARES THAT WHEN ADDED TO THE SHARES OWNED BY PARENT AND PURCHASER SHALL
CONSTITUTE 90% OF THE SHARES THEN OUTSTANDING (THE "SECOND MINIMUM CONDITION").
THE FIRST MINIMUM CONDITION MAY NOT BE WAIVED WITHOUT THE CONSENT OF A MAJORITY
OF THE INDEPENDENT DIRECTORS. PURCHASER HAS AGREED TO WAIVE THE SECOND MINIMUM
CONDITION UNDER CERTAIN CIRCUMSTANCES DESCRIBED HEREIN. PURCHASER CURRENTLY OWNS
10,610,099 SHARES, CONSTITUTING APPROXIMATELY 73.2% OF THE CURRENTLY OUTSTANDING
SHARES. PURCHASER ALSO HAS WARRANTS TO ACQUIRE AN ADDITIONAL 1,367,600 SHARES
(THE "WARRANTS"), WHICH IT DOES NOT CURRENTLY INTEND TO EXERCISE. SEE "THE
TENDER OFFER -- SECTION 12. CERTAIN CONDITIONS OF THE OFFER", WHICH SETS FORTH
IN FULL THE CONDITIONS TO THE OFFER.
<PAGE>
    The Company has advised Purchaser that as of January 10, 1997, (i)
14,500,094 Shares were issued and outstanding, (ii) no Shares were held in the
treasury of the Company and (iii) 2,003,188 Shares were reserved for future
issuance to employees pursuant to outstanding employee stock options granted
pursuant to the Company's stock option plans ("Options"), a maximum of 987,436
of which could become exercisable by February 14, 1997 ("Exercisable Options").
The Company has further advised Purchaser that prior to the announcement of the
Offer, there were approximately 153 holders of record of the issued and
outstanding Shares. Purchaser beneficially owns 11,977,699 Shares, (i) 5,993,827
of which it acquired pursuant to an Acquisition Agreement, dated as of December
16, 1991 (the "Acquisition Agreement"), among the Company, Parent and Purchaser,
(ii) 4,616,272 of which it acquired pursuant to a Stock and Warrant Purchase
Agreement, dated as of January 30, 1995, among the Company, Purchaser and Parent
(the "Stock and Warrant Purchase Agreement") and (iii) 1,367,600 of which it has
the right to acquire pursuant to Warrants granted under the Stock and Warrant
Purchase Agreement (see "SPECIAL FACTORS -- Background of the Offer and the
Merger"). Purchaser does not currently intend to exercise any of the Warrants,
which have an exercise price of $27.50 per Share. As a result, assuming
Purchaser does not exercise any of the Warrants but all Exercisable Options are
exercised, the First Minimum Condition would be satisfied if 2,438,716 Shares
were validly tendered in the Offer and not withdrawn and the Second Minimum
Condition would be satisfied if 3,328,678 Shares were validly tendered in the
Offer and not withdrawn.
 
    The Offer is being made pursuant to an Agreement and Plan of Merger, dated
as of January 10, 1997 (the "Merger Agreement"), among Parent, Purchaser and the
Company. The Merger Agreement provides that, among other things, as soon as
practicable after the purchase of Shares pursuant to the Offer and the
satisfaction of the other conditions set forth in the Merger Agreement and in
accordance with the relevant provisions of the General Corporation Law of the
State of Delaware ("Delaware Law"), Purchaser will be merged with and into the
Company (the "Merger"). Following consummation of the Merger, the Company will
continue as the surviving corporation (the "Surviving Corporation") and will
become an indirect wholly owned subsidiary of Parent. At the effective time of
the Merger (the "Effective Time"), each Share issued and outstanding immediately
prior to the Effective Time (other than Shares held in the treasury of the
Company or owned by Purchaser, Parent or any direct or indirect wholly owned
subsidiary of Parent or the Company, and other than Shares held by stockholders
who shall have properly demanded and perfected appraisal rights under Section
262 of Delaware Law) will be cancelled and converted automatically into the
right to receive $19.50 in cash, or any higher price that may be paid per Share
pursuant to the Offer, without interest (the "Merger Consideration"). The Merger
Agreement is more fully described in "SPECIAL FACTORS -- The Merger Agreement".
 
    The consummation of the Merger is subject to the satisfaction or waiver of
certain conditions, including the approval and adoption of the Merger Agreement
by the requisite vote of the stockholders of the Company. See "SPECIAL FACTORS
- -- The Merger Agreement". Under the Company's Certificate of Incorporation and
Delaware Law, the affirmative vote of the holders of a majority of the
outstanding Shares is required to approve and adopt the Merger Agreement and the
Merger. Consequently, Purchaser currently has sufficient voting power to approve
and adopt the Merger Agreement and the Merger without the vote of any other
stockholder.
 
    Under Delaware Law, if Purchaser owns, following consummation of the Offer
or otherwise, at least 90% of the then outstanding Shares, Purchaser will be
able to approve and adopt the Merger Agreement and the transactions contemplated
thereby, including the Merger, without a vote of the Company's stockholders. In
such event, Parent, Purchaser and the Company have agreed to take all necessary
and appropriate action to cause the Merger to become effective as soon as
reasonably practicable after such acquisition, without a meeting of the
Company's stockholders. Purchaser's obligation to consummate the Offer is
conditioned on there being validly tendered and not withdrawn at least the
number of Shares that, when added to the 10,610,099 Shares owned by Purchaser,
shall constitute 90% of the Shares then outstanding, so as to enable Purchaser
to consummate the Merger without a vote of the Company's
 
                                       2
<PAGE>
stockholders. If, however, fewer than such number of Shares are validly tendered
and not withdrawn, and all other conditions set forth in Annex A of the Merger
Agreement are satisfied, Purchaser may extend the Offer for a period not to
exceed 20 business days after the initial expiration date of the Offer, after
which time (or earlier if Parent did not extend the Offer) Purchaser is
obligated to waive the Second Minimum Condition and acquire such fewer number of
Shares (although it may not acquire less than a majority of the Shares
outstanding other than Shares owned by Parent or Purchaser without the consent
of a majority of the Independent Directors). In such case, a vote of the
Company's stockholders will be required under Delaware Law, and a significantly
longer period of time will be required to effect the Merger. See "SPECIAL
FACTORS -- Purpose and Structure of the Offer and the Merger; Reasons of Parent
and Purchaser for the Offer and the Merger".
 
    THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.
 
                                SPECIAL FACTORS
 
BACKGROUND OF THE OFFER AND THE MERGER
 
    On December 16, 1991, the Company, Purchaser and Parent entered into the
Acquisition Agreement, pursuant to which Purchaser subsequently acquired
5,993,827 Shares. Pursuant to the Acquisition Agreement, for a ten-year period
beginning at closing and subject to certain exceptions, Parent is prohibited
from acquiring additional Shares without the approval of the majority of the
Independent Directors. The Acquisition Agreement affords Parent representation
on the Board in direct proportion to its percentage stock ownership.
 
    In April 1993, the Company entered into an agreement with Sandoz
Pharmaceutical Corporation, a wholly owned affiliate of Sandoz Pharma Ltd.
(collectively the "Sandoz entities"), to form a joint venture ("Progenesys")
with a primary mission to research and develop hematopoietic cell-based, somatic
gene therapies against HIV infection. The Company and the Sandoz entities
licensed certain initial technologies, within the field, to Progenesys. On
August 31, 1995, the Progenesys partnership was dissolved and replaced by a
collaborative agreement (the "HIV Gene Therapy Collaboration") between the
Company and the Sandoz entities, with terms and conditions substantially
equivalent to those of the partnership agreement. In November 1993, the Company
entered into a two-year collaboration agreement with Parent regarding
therapeutic anti-viral agents for HIV infection. The Company and Parent jointly
decided to terminate the agreement as of March 31, 1995. In March 1994, the
Company and Parent agreed to provide funding for a portion of the research
carried out at Stanford University School of Medicine. For a fuller description
of these arrangements, see "SPECIAL FACTORS -- Related Party Transactions".
 
    In 1995, Purchaser increased its investment in the Company pursuant to the
Stock and Warrant Purchase Agreement, whereby Purchaser acquired 4,616,272
additional Shares and Warrants to acquire a further 1,367,600 Shares.
 
    On May 23, 1996, Parent delivered a letter to the Board offering to acquire
all the issued and outstanding Shares not then owned by Purchaser for $17.00 per
Share in cash.
 
    On May 24, 1996, the three Independent Directors (Messrs. Ruvane, Edgar and
Schollmaier) first met to consider Parent's proposal. On the same day they
retained their own independent counsel. In early June 1996, the Company advised
Parent that the Independent Directors had selected Lehman Brothers to serve as
financial advisor. The terms of Lehman Brothers' undertaking to render financial
advisory services to the Independent Directors is set forth below in "SPECIAL
FACTORS -- Opinion of Lehman Brothers Inc."
 
    On June 13, 1996, Dr. Daniel L. Vasella, Chief Executive Officer of Parent,
invited Edgar Schollmaier, an Independent Director of the Company, to Parent's
corporate headquarters in Basle, Switzerland to
 
                                       3
<PAGE>
meet and discuss Parent's proposal. At that meeting, Mr. Schollmaier indicated
to Dr. Vasella that the Independent Directors were likely to conclude that
Parent's $17.00 per Share proposal was insufficient.
 
    During August 1996, Morgan Stanley and Lehman Brothers had various
discussions regarding the financial aspects of Parent's proposal.
 
    On September 24, 1996, Joseph J. Ruvane, Jr., an Independent Director of the
Company, together with representatives from Lehman Brothers, met in New York
with Dr. Raymund Breu, Chief Financial Officer of Parent, and representatives of
Morgan Stanley. At the meeting, Morgan Stanley and Lehman Brothers
representatives discussed the terms of the outstanding offer made by Purchaser
and the Company's future financing needs.
 
    From October 19 through October 26, 1996, Dr. Breu had telephone
conversations and discussions with Harold Edgar, an Independent Director of the
Company, regarding Purchaser's offer. Dr. Breu and Mr. Edgar discussed Parent's
reasons for such offer and the terms thereof.
 
    On October 28, 1996, the Independent Directors rejected Parent's offer to
acquire the remaining Shares for $17.00 per Share.
 
    On November 1, 1996, Mr. Schollmaier met with Dr. Breu and reviewed the
bases for the Independent Directors' rejection of Parent's proposal. Mr.
Schollmaier suggested that the Independent Directors would be willing to resume
negotiations at a higher price.
 
    In mid-November 1996, Dr. Breu advised the Independent Directors that Parent
believed it might be mutually beneficial to reopen negotiations.
 
    On December 19, 1996, Dr. Breu, Dr. Vasella and Dr. Paul Herrling, Head of
Research of the Pharma Division of Parent, met in New York with Messrs. Ruvane,
Edgar and Schollmaier to discuss the possibility of Purchaser increasing the
value of its offer. Parent's representatives indicated a willingness to consider
offering $19.50 per Share if acceptable mimimum conditions and other terms could
be agreed upon.
 
    On December 30, 1996, Parent's counsel delivered an initial draft of the
Merger Agreement to the Independent Directors, the Company and their respective
counsel.
 
    Negotiations continued over the next several days. On January 6, 1996, Dr.
Breu reiterated Parent's willingness to consider offering $19.50 per Share if
all remaining issues, including acceptable miminum conditions, were resolved.
All remaining issues were resolved on January 10, 1997.
 
    The Board approved and adopted the Merger Agreement at a meeting held on
January 10 and the Merger Agreement was executed as of January 10, 1997.
 
RECOMMENDATION OF THE COMPANY'S BOARD; FAIRNESS OF THE OFFER AND THE MERGER
 
    RECOMMENDATION OF THE COMPANY'S BOARD
 
    On January 10, 1997, the Board, by a unanimous vote of all directors present
and voting (with all directors who are designees of Parent abstaining), based in
part on the unanimous recommendation and approval of the Independent Directors,
as required by the Acquisition Agreement, approved the Merger Agreement and the
transactions contemplated thereby and determined that each of the Offer and the
Merger is fair to, and in the best interests of, the stockholders of the Company
(other than Parent and Purchaser). The Board, by a unanimous vote of all
directors present and voting (with all directors who are designees of Parent
abstaining), has recommended that all holders of Shares accept the Offer and
tender their Shares pursuant to the Offer.
 
                                       4
<PAGE>
    FAIRNESS OF THE OFFER AND THE MERGER
 
    In reaching its determinations referred to immediately above, the
Independent Directors considered the following factors, each of which, in the
view of the Independent Directors, supported such determinations:
 
        (i) the Company's uncertain financial prospects as a result of (a) the
    current rate at which the Company is utilizing its available funds, and (b)
    uncertainty as to whether the Company would be able to raise additional
    capital which would be adequate for its ongoing needs (particularly in light
    of Parent's stated refusal to participate in any further financing and
    Parent's ability to maintain its percentage interest in the Company through
    certain "top-up" rights granted to Parent and Purchaser in connection with
    their 1991 investment in the Company);
 
        (ii) the risk that the Company would suffer the loss of key employees
    and other adverse consequences if the Company did not accept the Offer and
    had pursued other alternatives with the attendant delay;
 
        (iii) the historical market prices and recent trading activity of the
    Shares, including the fact that the $19.50 per Share cash consideration to
    be paid to the Public Stockholders in the Offer and Merger represents a
    premium of 77.3% over the reported cash price on the last full trading day
    preceding the public announcement of the initial offer by Parent and
    Purchaser and a premium of 34.5% over the average closing price for the
    thirty days prior to January 3, 1997;
 
        (iv) the history of the negotiations between the Independent Directors
    and their representatives and Parent and its representatives, including the
    facts that (a) the negotiations resulted in an increase in the price at
    which Parent and Purchaser were prepared to acquire the Company's
    outstanding Shares from $17.00 to $19.50 per Share, and (b) the Independent
    Directors belief that Parent and Purchaser would not further increase the
    Offer and that $19.50 per Share was the highest price which could be
    obtained from Parent and Purchaser;
 
        (v) the opinion of Lehman Brothers that the consideration to be offered
    to the holders of Shares in each of the Offer and the Merger is fair to such
    stockholders (other than Parent) from a financial point of view and the
    report and analysis presented by Lehman Brothers;
 
        (vi) the First Minimum Condition's requirement that the Offer not be
    consummated unless at least a majority of those Shares not held by Parent or
    Purchaser are validly tendered pursuant to the Offer and not withdrawn;
 
        (vii) the stated unwillingness of Parent and Purchaser to consider a
    sale of their interest in the Company which made pursuit of other potential
    business combinations impracticable;
 
        (viii) the availability of dissenters' rights under Delaware Law;
 
        (ix) the likelihood that the proposed acquisition would be consummated,
    based in part on the financial condition of Parent;
 
        (x) the terms and conditions of the Merger Agreement, including the
    absence of a financing condition; and
 
        (xi) the structure of the transaction which is designed, among other
    things, to result in receipt by the stockholders at the earliest practicable
    time of the consideration to be paid in the Offer and the fact that the per
    Share consideration to be paid in the Offer and the Merger is the same.
 
    In reading its determinations referred to above, the Board considered the
recommendation of the Independent Directors and the factors set forth
immediately above, each of which, in view of the Board, supported such
determinations.
 
                                       5
<PAGE>
    The members of the Board, including the Independent Directors, evaluated the
various factors listed above in light of their knowledge of the business,
financial condition and prospects of the Company, and based upon the advice of
financial and legal advisors. In light of the number and variety of factors that
the Board and the Independent Directors considered in connection with their
evaluation of the Offer and the Merger, neither the Board nor the Independent
Directors found it practicable to assign relative weights to the foregoing
factors, and, accordingly, neither the Board nor the Independent Directors did
so. In addition to the factors listed above, the Board and the Independent
Directors had each considered the fact that consummation of the Offer and the
Merger would eliminate the opportunity of the Public Stockholders to participate
in any potential future growth in the value of the Company, but determined that
(i) this loss of opportunity was reflected in part by the price of $19.50 per
Share to be paid in the Offer and the Merger, and (ii) as noted above, there was
significant uncertainty as to the Company's long-term economic viability.
 
    The Board, including the Independent Directors, believes that the Offer and
the Merger are procedurally fair because, among other things: (i) the
Independent Directors consisted of independent directors appointed to represent
the interests of the Public Stockholders; (ii) the Independent Directors
retained and were advised by independent legal counsel; (iii) the Independent
Directors retained Lehman Brothers as their independent financial advisor to
assist them in evaluating the Offer and the Merger; (iv) the existence of the
First Minimum Condition to the Offer; (v) the deliberations pursuant to which
the Independent Directors evaluated the Offer and the Merger and alternatives
thereto; and (vi) the fact that the $19.50 per Share price and the other terms
and conditions of the Merger Agreement resulted from active arm's length
bargaining between representatives of the Independent Directors, on the one
hand, and Parent, on the other.
 
    The Board and the Independent Directors recognized that the Merger is not
structured to require the approval of a majority of the stockholders of the
Company other than Purchaser, and that Purchaser has sufficient voting power to
approve the Merger without the affirmative vote of any other stockholder of the
Company. Consummation of the Offer, however, is conditioned upon the decision of
holders of a majority of the Shares, other than those held by Parent or
Purchaser, to accept the Offer by tendering their Shares, and a condition to the
Merger is that the Purchaser shall have purchased all Shares tendered in the
Offer. While consummation of the Offer would result in the stockholders of the
Company receiving a premium for their Shares over the trading prices of the
Shares prior to the announcement of the Offer and the Merger, it would eliminate
any opportunity for stockholders of the Company other than Parent and Purchaser
to participate in the potential future growth prospects of the Company. The
Board and the Independent Directors, however, believed that this was reflected
in the Offer price to be paid.
 
OPINION OF LEHMAN BROTHERS INC.
 
    Lehman Brothers has acted as financial advisor to the Independent Directors
in connection with the Merger, as described under "SPECIAL FACTORS -- Background
of the Offer and the Merger". As part of its role as financial advisor, Lehman
Brothers was engaged to render to the Board an opinion as to the fairness, from
a financial point of view, to the Company's stockholders (other than Parent) of
the consideration to be offered in the Offer and the Merger.
 
    On January 6, 1997, in connection with the Independent Directors'
preliminary evaluation of the Offer, the Merger and the Merger Agreement, Lehman
Brothers made a preliminary presentation to the Independent Directors with
respect thereto (the "Lehman Brothers Report"). As part of the presentation,
Lehman Brothers reviewed with the Independent Directors certain of the
information and financial data described below.
 
    Complete copies of the Lehman Brothers Report were delivered to the
Independent Directors on January 7, 1997, in connection with the Independent
Directors' final evaluation of the Offer, the Merger and the Merger Agreement.
On January 9, 1997, representatives of Lehman Brothers reviewed the information
included in the Lehman Brothers Report with John J. Schwartz, Ph.D. and Irving
L. Weissman, M.D. (the directors of the Company who are neither Independent
Directors nor designees of Parent).
 
                                       6
<PAGE>
    On January 10, 1997, Lehman Brothers reviewed with the Independent Directors
the matters set forth in the Lehman Brothers Report and rendered its oral
opinion to the Independent Directors that as of that date the proposed
consideration to be offered in the Offer and the Merger was fair, from a
financial point of view, to the stockholders of the Company, other than Parent.
 
    Later on January 10, 1997, in connection with the Board's evaluation of the
Offer, the Merger and the Merger Agreement, Lehman Brothers reviewed with the
Board the matters set forth in the Lehman Brothers Report and rendered its oral
opinion to the Board that as of that date the proposed consideration to be
offered in the Offer and the Merger was fair, from a financial point of view, to
the stockholders of the Company, other than Parent.
 
    Lehman Brothers delivered its written opinion to the Board on January 10,
1997 (the "Lehman Opinion"). A copy of the Lehman Opinion, which sets forth the
assumptions made, matters considered and limitations of review undertaken by
Lehman Brothers, is attached as Schedule II hereto.
 
    No limitations were imposed by the Company or the Independent Directors on
the scope of Lehman Brothers' investigation or the procedures to be followed by
Lehman Brothers in rendering the Lehman Opinion, except that Lehman Brothers was
not authorized to solicit, and did not solicit, any indications of interest from
any third party with respect to a purchase of all or a part of the Company's
business. Lehman Brothers was not requested to and did not make any
recommendation to the Independent Directors or the Board as to the form or
amount of consideration to be offered to the stockholders in the Offer or the
Merger, which was determined through negotiations between the Independent
Directors and its financial and legal advisors (including Lehman Brothers) and
Parent and its financial and legal advisors. In arriving at the Lehman Opinion,
Lehman Brothers did not ascribe a specific range of value to the Company, but
rather made its determination as to the fairness, from a financial point of
view, of the consideration to be offered to the stockholders (other than Parent)
in the Offer and the Merger on the basis of the financial and comparative
analyses described below. The Lehman Opinion is for the use and benefit of the
Independent Directors and Messrs. Schwartz and Weissman and was rendered to them
in connection with their consideration of the Offer and the Merger and is not
intended to be and does not constitute a recommendation to any Public
Stockholder as to whether to accept the consideration to be offered to such
stockholder in the Offer or the Merger. Lehman Brothers was not requested to
opine as to, and the Lehman Opinion does not in any manner address, the
Company's underlying business decision to enter into the Merger Agreement.
 
    In arriving at the Lehman Opinion, Lehman Brothers reviewed and analyzed:
(a) the Merger Agreement and the specific terms of the Offer and the Merger; (b)
publicly available information concerning the Company which Lehman Brothers
believed to be relevant to its analysis, including the Company's Form 10-K for
the year ended December 31, 1995 and the Company's Form 10-Q for the quarter
ended September 30, 1996; (c) other financial and operating information with
respect to the business, operations and prospects of the Company prepared by the
Company in 1996 and furnished to Lehman Brothers by the Company (including
financial projections for the fiscal years 1996-2005); (d) a trading history of
the Shares from August 7, 1991 to the present and a comparison of that trading
history with those of other companies that Lehman Brothers deemed relevant; (e)
a comparison of the historical financial results and present financial condition
of the Company with those of other companies that Lehman Brothers deemed
relevant; (f) an analysis of the cash required to fund the Company's near term
capital and operating requirements, the cash currently available to the Company
and the alternatives available to the Company to obtain additional financing;
and (g) a comparison of the financial terms of the Offer and the Merger with the
financial terms of certain other transactions that Lehman Brothers deemed
relevant. In addition, Lehman Brothers had discussions with the management of
the Company concerning its business, operations, assets, financial condition and
prospects, and undertook such other studies, analyses and investigations as
Lehman Brothers deemed appropriate.
 
                                       7
<PAGE>
    In arriving at the Lehman Opinion, Lehman Brothers assumed and relied upon
the accuracy and completeness of the financial information provided by the
Company and other information used by Lehman Brothers without assuming any
responsibility for independent verification of such information and further
relied upon the assurances of management of the Company that they were not aware
of any facts that would make the information provided by the Company inaccurate
or misleading. With respect to the financial projections of the Company, upon
advice of the Company, Lehman Brothers assumed that such projections were
reasonably prepared on a basis reflecting the best available estimates and
judgments of the management of the Company as to the future financial
performance of the Company. However, for purposes of its analysis, Lehman
Brothers also considered certain more conservative assumptions and estimates
which resulted in significant adjustments to the projections of the Company.
Lehman Brothers discussed these adjusted projections with the Company's
management and they have agreed that, because the Company's projections have
been prepared based on assumptions which include the success of each of its
products in human clinical trials and in the marketplace, it is appropriate for
Lehman Brothers to adjust such projections to reflect the uncertainties inherent
in the business and prospects of the Company and in the Company's ability to
secure adequate financing in the future to fund its capital and operating
requirements. Without agreeing with each particular adjustment Lehman Brothers
made, the Company's management believes that the overall extent of Lehman
Brothers' adjustments to the Company's projections is reasonable and that Lehman
Brothers' use of such adjusted projections in its analysis is appropriate. In
arriving at the Lehman Opinion, Lehman Brothers conducted a limited physical
inspection of the properties and facilities of the Company and did not make nor
obtain any evaluations or appraisals of the assets or liabilities of the
Company. The Lehman Opinion was necessarily based upon market, economic and
other conditions as they existed on, and could be evaluated as of, the date of
the Lehman Opinion.
 
    The following paragraphs summarize the financial and comparative analyses
performed by Lehman Brothers in connection with the January 10, 1997 oral
opinions and presented initially to the Independent Directors and later to the
Board. The summary does not represent a complete description of the analyses
performed by Lehman Brothers.
 
    The preparation of a fairness opinion involves various determinations as to
the most appropriate and relevant methods of financial and comparative analysis
and the application of those methods to the particular circumstances and,
therefore, such an opinion is not readily susceptible to summary description.
Furthermore, in arriving at the Lehman Opinion, Lehman Brothers did not
attribute any particular weight to any analysis or factor considered by it, but
rather made qualitative judgments as to the significance and relevancy of each
analysis and factor. Accordingly, Lehman Brothers believes that its analyses
must be considered as a whole and that considering any portions of its analyses
and of the factors considered by it, without considering all analyses and
factors, could create a misleading or incomplete view of the process underlying
the Lehman Opinion. In its analyses, Lehman Brothers made numerous assumptions
with respect to industry performance, general business and economic conditions
and other matters, many of which are beyond the Company's control. Any estimates
contained in these analyses are not necessarily indicative of actual values or
predictive of future results or values, which may be significantly more or less
favorable than as set forth therein. Additionally, analyses relating to the
value of businesses do not purport to be appraisals or to reflect the prices at
which businesses actually may be sold.
 
    COMMON STOCK PRICE ANALYSIS.  Lehman Brothers compared the Company's stock
price performance from August 7, 1991 to January 3, 1997 against the offer of
$19.50 per Share. Lehman Brothers noted that the offer of $19.50 per Share was
above the closing stock price for all but 42 trading days since February 1,
1993. Lehman Brothers also compared the price performance of the Company's
common stock from August 7, 1991 to January 3, 1997 with those of the AMEX
Biotechnology Index. Using August 7, 1991 as a base value of 100%, on January 3,
1997, the Company's stock price was 67.7% of its base value as compared to the
AMEX Biotechnology Index, which was 204.2% of its base value.
 
                                       8
<PAGE>
    COMMON STOCK TRADING VOLUME ANALYSIS.  Lehman Brothers analyzed the
historical daily trading volume of the Company's common stock over various
periods. Lehman Brothers noted that since January 1, 1995, 3,285,900 common
shares had been traded. Of these shares, only 10.8% of the shares traded between
$17.88 to $18.63 per share; 36.3% of the shares traded between $15.88 and $17.88
per share; 37.1% of the shares traded between $13.88 to $15.88; and the
remaining 15.8% of the shares traded below $13.88 per share.
 
    COMPARABLE PUBLIC COMPANY ANALYSIS.  Lehman Brothers compared the historical
financial, operating and stock market performances of certain publicly traded
companies that it considered relevant with the historical financial and
operating performance of the Company, based upon information that was publicly
available at that time and based upon information provided to Lehman Brothers by
the management of the Company. The companies that Lehman Brothers included in
its universe of gene therapy companies were Avigen Inc., GeneMedicine, Inc.,
Ribozyme Pharmaceuticals, Inc., Somatix Therapy Corporation, Targeted Genetics
Corporation and Vical Incorporated (the "Comparable Gene Therapy Companies"),
and in its universe of cell therapy companies were Cell Genesys, Inc. and
CellPro Incorporated (the "Comparable Cell Therapy Companies"). Lehman Brothers
examined both the market value of the total outstanding common equity (the
"Market Value") and the Market Value minus "Cash" (the "Technology Value"), the
historical cash-burn rate, cash on hand and years of cash remaining for both
such groups of comparable companies. "Cash" equals cash and cash equivalents
plus short-term marketable securities.
 
    Lehman Brothers noted that at the proposed purchase price of $19.50 per
Share, the fully-diluted Market Value for the Company of $287.4 million was
above the high end of the high/low range of $270.7 million to $36.1 million for
the Comparable Gene Therapy Companies, and above the high end of the high/ low
range of $196.1 million to $183.8 million for the Comparable Cell Therapy
Companies. The proposed purchase price represented a 145.2% premium to the mean
market valuation of $117.2 million, and a $187.7% premium to the median market
valuation of $99.9 million for the Comparable Gene Therapy Companies. The
proposed purchase price represented a 51.3% premium to the mean market valuation
of $189.9 million for the Comparable Cell Therapy Companies.
 
    Lehman Brothers also noted that the proposed purchase price of $19.50 per
share, the fully-diluted Technology Value for the Company of $268.4 million was
above the high end of the high/low range of $219.9 million to $15.1 for the
Comparable Gene Therapy Companies, and above the high end of the high/ low range
of 104.8 million to $77.4 million for the Comparable Cell Therapy Companies. The
proposed purchase price represented a 239.8% premium to the mean technology
valuation of $79 million, and a 328.8% premium to the median technology
valuation of $62.6 million for the Comparable Gene Therapy Companies. The
proposed purchase price represented a 194.6% premium to the mean market
valuation of $91.1 million.
 
    Lehman Brothers noted that, per discussions with the Company management, the
Company had approximately $25 million of cash and cash equivalents as of
December 31, 1996. Lehman Brothers noted that the Company's implied burn life,
calculated as the cash on hand divided by the latest twelve month cash burn rate
(defined as the product of net income and depreciation less capital
expenditures) of 0.8 years was 74.2% less than the mean implied burn life of 3.1
years for the Comparable Gene Therapy Companies and 91.8% less than the mean
implied burn life of 9.7 years for the Comparable Cell Therapy Companies.
 
    Lehman Brothers also compared the price performance of the Common Stock from
January 2, 1995 to January 3, 1997 with those of an index of the Comparable Gene
Therapy and Cell Therapy Companies and the AMEX Biotechnology Index. Using
January 2, 1995 as the base of 100%, on January 3, 1997, the Common Stock price
was 88.6% of the base value, as compared to an index of the Comparable Gene
Therapy and Cell Therapy Companies and the AMEX Biotechnology Index values of
177.9% and 158.6% of their base value, respectively.
 
                                       9
<PAGE>
    Because of the inherent differences between the business, operations and
prospects of the Company and the businesses, operations and prospects of the
Comparable Gene Therapy Companies, the Comparable Cell Therapy Companies and
large capitalization biotechnology companies, Lehman Brothers believed that it
was inappropriate to, and therefore did not, rely solely on the quantitative
results of the analysis but rather also made qualitative judgments concerning
differences between the financial and operating characteristics and prospects of
the Company and the Comparable Gene Therapy Companies and the Comparable Cell
Therapy Companies that would affect the public trading values of each.
 
    DISCOUNTED CASH FLOW ANALYSIS.  Lehman Brothers performed a discounted cash
flow analysis on the projected financial information provided by the Company to
Lehman Brothers. Lehman Brothers noted that the Company's projections were
prepared based on assumptions that include, among other things, the success of
each of its products in human clinical trials and in the market place. For
purposes of its analysis, Lehman Brothers considered certain more conservative
assumptions and estimates that reflect the uncertainties inherent in the
Company's business and prospects. Using these more conservative assumptions and
estimates, Lehman Brothers prepared two scenarios, whereby the second scenario
contained more significant adjustments to the Company's projections than the
first scenario. Lehman Brothers discounted to present value the projected stream
of after-tax cash flows and the terminal year value (the "Terminal Value") of
the business. The Terminal Value for the discounted cash flow analysis of the
Company's projections was based upon, among other things, a range of 5.0x-8.0x
multiples of projected fiscal 2001 revenues. The Terminal Value for the
discounted cash flow analyses of Lehman Brothers' two adjusted scenarios were
based upon, among other things, ranges of 11.0x-15.0x multiples of projected
fiscal 2005 earnings before interest and taxes ("EBIT"). Lehman Brothers
analyzed the revenue and EBIT multiples of Amgen, Inc. and an index of U.S.
Pharmaceutical Companies. Lehman Brothers noted that in 1990 and 1991 Amgen had
revenue multiples of 4.7x and 9.8x, respectively. Lehman Brothers also noted
that based on Lehman Brothers equity research estimates, Amgen has a 1997
revenue multiple of 5.3x. Additionally, Lehman Brothers noted that an index of
U.S. Pharmaceutical Companies has a one year forward revenue multiple of 3.6x
and an EBIT multiple of 16.2x. Lehman Brothers also noted that, based on Lehman
Brothers equity research estimates, Amgen has a one year forward EBIT multiple
of 12.6x.
 
    In performing this analysis, Lehman Brothers used discount rates ranging
from 35% to 50%, which were chosen based on several assumptions regarding
factors such as the current level of inflation, interest rates, the inherent
business risk in the Company's operations, as well as in the gene therapy and
biotechnology industry as a whole, and the cost of capital to the Company.
 
    For the discounted cash flow analysis of the Company's projections, (i) the
firm value of the Company resulting from these analyses ranged from $372.3
million to $1,032.8 million and (ii) the equity value per Share of the Common
Stock on a fully-diluted basis resulting from these analyses ranged from $25.92
to $66.70 per Share. In the first of Lehman Brothers' scenarios, (i) the imputed
firm value of the Company resulting from these analyses ranged from $144.1
million to $571.7 million and (ii) the imputed equity value per Share of the
Common Stock on a fully-diluted basis resulting from these analyses ranged from
$11.82 to $38.23. In the second of Lehman Brothers' scenarios, (i) the imputed
firm value of the Company resulting from these analyses ranged from $83.1
million to $406.2 million, and (ii) the imputed equity value per Share of the
Common Stock on a fully diluted basis resulting from these analyses ranged from
$8.06 to $28.01.
 
    COMPARABLE TRANSACTION ANALYSIS.  Lehman Brothers compared the financial and
operating performance of certain companies that had engaged in recent merger or
alliance transactions, and which Lehman Brothers considered relevant, with the
historical financial and operating performance of the Company, based upon
information that was publicly available at the time and based upon information
provided to Lehman Brothers by the Company's management. The transactions that
Lehman Brothers considered comparable to the Merger included the transactions by
Bergen Brunswig Corp. with IVAX Corp., by Rhone-Poulenc Rorer, Inc. with Applied
Immune Sciences, Inc., by Sandoz AG with Genetic Therapy,
 
                                       10
<PAGE>
Inc., by Chiron Corporation with Viagene, Inc., by Ligand Pharmaceuticals, Inc.
with Glycomed, Inc., by CIBA-GEIGY Limited with Chiron Corporation, by American
Cyanamid Company with Immunex Corporation,and by American Home Products with
Genetics Institute, Inc. Lehman Brothers analyzed the tender/merger price per
share for shares purchased directly from the target company (the "Merger
Purchase Price Per Share"). The Merger Purchase Price Per Share for each of
these transactions was then compared to the target stock price one day prior to
the announcement of the transaction to calculate the premium over such stock
price (the "Premium"). The Premium in the comparable transactions analyzed by
Lehman Brothers ranged from a high of 67.9% to a low of (13.4)%. In addition,
Lehman Brothers noted that the Premium for the Company at the proposed purchase
price of $19.50 per Share was 77.3% when compared to the price of $11.00 per
share one day prior to Parent's public announcement of its original proposal of
$17.00 on May 24, 1996. Lehman Brothers also noted that the premium for the
Company at the proposed purchase price of $19.50 per Share was 29.5% on January
3, 1997.
 
    In addition, the Merger Purchase Price Per Share for each of these
transactions was then compared to: (i) the target's stock price 30 days prior to
the announcement of the transaction, (ii) the target's high stock price over the
last twelve months prior to announcement of the transaction and (iii) the
target's low stock price over the last twelve months prior to announcement of
the transaction. The high and low premiums were as follows: (i) 95.3% to
(11.3)%, (ii) 245.7% to (54.9)%; and (iii) 533.8% to 5.8%. The respective
premiums for the Company at the proposed purchase price of $19.50 per Share for
such dates or periods ending May 23, 1996 are as follows (i) 51.5%, (ii) 16.4%,
and (iii) 77.3%. Lehman Brothers also noted that the premiums for the Company at
the proposed purchase price of $19.50 per Share for such dates or periods ending
on January 3, 1997 were (i) 34.5%, (ii) 4.7% and (iii) 77.3%.
 
    Because the reasons for and the circumstances surrounding each of the
transactions analyzed were specific to each transaction and because of the
inherent difference between the businesses, operations and the prospects of the
Company and the business, operations and prospects of the selected acquired
companies analyzed, Lehman Brothers believed that it was inappropriate to, and
therefore did not, rely solely on the quantitative results of the analysis, but
rather also made qualitative judgments concerning differences between the
characteristics of these transactions and the Offer and the Merger that would
affect the acquisition values of the Company and such acquired companies.
 
    HISTORICAL AND PROJECTED FINANCIAL STATEMENTS.  Lehman Brothers reviewed
historical financial statements of the Company and projected financial
statements of the Company through 2005 referred to above as well as the
assumptions underlying the Company's projections. In order to analyze the
Company's projections, Lehman Brothers compared the Company's projected revenue
and EBIT growth rates for five years after initial product launch to Amgen and
Genentech's revenue and EBIT growth rates for five years after initial product
launch. Lehman Brothers also reviewed the projected financial performance versus
actual financial performance in terms of sales, sales growth and net income for
Genentech and Genetics Institute. Lehman Brothers also reviewed the projections
of Applied Immune Science disclosed publicly in 1993 and compared these
projections to Applied Immune Sciences' projections disclosed publicly in 1995.
Additionally, Lehman Brothers compared the Company's projected sales disclosed
publicly in 1992 to actual sales during 1992 to 1996. Lehman Brothers also
compared the Company's projected EBIT margin ("EBIT margin") in 2005 to the 1995
EBIT margins of several large capitalization pharmaceutical companies (the
"Pharmaceutical Companies") and noted that the Company's projected EBIT margin
in year 2005 was substantially higher than the highest EBIT margin in the year
1995 of the Pharmaceutical Companies. Lehman Brothers also compared the
Company's projected selling, general and administrative expenses ("SG&A") as a
percentage of revenues and projected 2005 research and development expenses
("R&D") as a percentage of revenues to the SG&A as a percentage of revenues and
R&D as a percentage of revenues for several large capitalization pharmaceutical
and biotechnology companies (the "Pharmaceutical and Biotechnology Companies").
Lehman Brothers noted that the Company's projected SG&A as a percentage of
revenues and R&D as a percentage of revenues was lower than the lowest SG&A as a
 
                                       11
<PAGE>
percentage of revenues and lower than the mean R&D as a percentage of revenues
for the Pharmaceutical and Biotechnology Companies.
 
    ALTERNATIVES CONSIDERED.  Lehman Brothers reviewed the recent weak financing
environment for biotechnology companies and also analyzed the stock price
changes of certain large biotechnology companies from May 1, 1996 to January 3,
1997. Lehman Brothers noted the decrease in stock prices for the following
companies: Amgen Inc., (0.7%); Centocor, Inc., (10.5%); Chiron Corporation,
(20.1%); and Genzyme Corporation, (15.7%).
 
    Lehman Brothers analyzed the changes in original filing price to offered
price for biotechnology initial public offerings from July 1, 1996 to January 3,
1997. Lehman Brothers noted that the mean, median, high and low change of offer
price from midpoint of the filing range for initial public offerings was
(16.5%), (16.7%), 7.1% and (41.7%), respectively. Lehman Brothers also analyzed
the change in original filing price to offered price for biotechnology follow-on
offerings from July 1, 1996 to January 3, 1997. Lehman Brothers noted that the
mean, median, high and low change of offer price from the original filing price
for follow-on offerings was (31.0%), (26.3%), (13.5%) and (52.6%), respectively.
 
    Lehman Brothers analyzed the possible dilutive effects of a public offering
on the Company's existing stockholders and the dilutive effect of Parent's
"top-up" rights under their existing agreements with the Company. Lehman
Brothers also reviewed the viability of the Company pursuing certain other
strategic alternatives and considered, in particular, the fact that Parent has
indicated that it is unwilling to facilitate another potential strategic partner
making an offer for the Company.
 
    The full text of the written opinion of Lehman Brothers dated as of January
10, 1997, which sets forth the assumptions made, matters considered and
limitations on the review undertaken, is attached as Schedule II hereto. Lehman
Brothers' opinion is directed only to the fairness of the consideration to be
received by the stockholders of the Company (other than Parent) from a financial
point of view and has been provided for the use of the Board and the Independent
Directors in their evaluation of the Offer and the Merger, does not address any
other aspect of the Offer and the Merger or any related transaction and does not
constitute a recommendation to any stockholder of the Company as to whether such
stockholder should accept the Offer. The summary of the opinion of Lehman
Brothers set forth herein is qualified in its entirety by reference to the full
text of such opinion.
 
COMPANY FINANCIAL PROJECTIONS
 
    The Company does not, as a matter of course, make public forecasts or
projections as to future sales, earnings or other income statement data.
However, in connection with Purchaser's and Parent's review of the transactions
contemplated by the Merger Agreement, Parent examined certain projections
prepared by the Company in 1993, the most current projections then in the
possession of Parent, including the following:
<TABLE>
<CAPTION>
                                                                 PROJECTED YEARS ENDING DECEMBER 31,
                                        --------------------------------------------------------------------------------------
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
                                          1996E      1997E      1998E      1999E      2000E      2001E      2002E      2003E
                                        ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
 
<CAPTION>
                                                                            (IN THOUSANDS)
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
Total revenue.........................  $   1,800  $   2,300  $  22,579  $  87,231  $ 147,378  $ 219,492  $ 284,592  $ 339,906
Total operating expenses..............     59,980     67,286     68,648     65,592     66,271     69,217     72,311     75,560
Pretax earnings/(loss)................    (60,095)   (66,987)   (54,128)     1,745     50,228    111,022    160,512    201,912
 
<CAPTION>
 
<S>                                     <C>
                                          2004E
                                        ---------
 
<S>                                     <C>
Total revenue.........................  $ 393,162
Total operating expenses..............     78,972
Pretax earnings/(loss)................    245,503
</TABLE>
 
    THE FOREGOING PROJECTIONS WERE BASED ON ASSUMPTIONS CONCERNING THE COMPANY'S
PRODUCTS AND BUSINESS PROSPECTS IN 1993, INCLUDING THE ASSUMPTION THAT THE
COMPANY WOULD CONTINUE TO OPERATE UNDER THE SAME OWNERSHIP STRUCTURE AS THEN
EXISTED. THE PROJECTIONS WERE ALSO BASED ON OTHER REVENUE AND OPERATING
ASSUMPTIONS. PROJECTED INFORMATION OF THIS TYPE IS BASED ON ESTIMATES AND
ASSUMPTIONS THAT ARE INHERENTLY SUBJECT TO SIGNIFICANT ECONOMIC AND COMPETITIVE
UNCERTAINTIES AND CONTINGENCIES, ALL OF WHICH ARE DIFFICULT TO
 
                                       12
<PAGE>
PREDICT AND MANY OF WHICH ARE BEYOND THE COMPANY'S CONTROL. ACCORDINGLY, THERE
CAN BE NO ASSURANCE THAT THE PROJECTED RESULTS WOULD BE REALIZED OR THAT ACTUAL
RESULTS WOULD NOT BE SIGNIFICANTLY HIGHER OR LOWER THAN THOSE SET FORTH ABOVE.
IN ADDITION, THESE PROJECTIONS WERE NOT PREPARED WITH A VIEW TO PUBLIC
DISCLOSURE OR COMPLIANCE WITH THE PUBLISHED GUIDELINES OF THE COMMISSION OR THE
GUIDELINES ESTABLISHED BY THE AMERICAN INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS
REGARDING PROJECTIONS AND FORECASTS AND ARE INCLUDED IN THIS OFFER TO PURCHASE
ONLY BECAUSE SUCH INFORMATION WAS MADE AVAILABLE TO PURCHASER AND PARENT BY THE
COMPANY. NONE OF PARENT, PURCHASER, THE COMPANY OR ANY OTHER PARTY ASSUMES ANY
RESPONSIBILITY FOR THE ACCURACY OR VALIDITY OF THE FOREGOING PROJECTIONS.
 
POSITION OF PARENT AND PURCHASER REGARDING FAIRNESS OF THE OFFER AND THE MERGER
 
    Parent and Purchaser believe that the consideration to be received by the
Company's stockholders, other than Parent and Purchaser, pursuant to the Offer
and the Merger is fair to the Company's stockholders. Parent and Purchaser base
their belief solely on (i) the fact that the Company's Board and the Independent
Directors concluded that the Offer and the Merger are fair to and in the best
interests of the Company's stockholders (other than Parent and Purchaser), (ii)
the fact that all designees of Parent on the Board abstained from the votes
approving the Merger Agreement and the transactions contemplated thereby and
recommending the Offer and the Merger, (iii) the presentation of Morgan Stanley
to Parent described below, (iv) the fact that the Acquisition Agreement imposes
substantial restrictions on Parent's ability to acquire additional Shares, and
that the parties consequently negotiated the terms of the Offer and the Merger
and the Merger Agreement with the Company on an arm's-length basis, (v) the fact
that the consideration to be paid in the Offer and the Merger represents a
premium of approximately 77% over the reported closing price for the Shares on
the last trading day prior to the public announcement of Parent's original offer
to acquire the remaining equity in the Company and (vi) the historical financial
performance of the Company and its financial results. Parent and Purchaser have
reviewed the factors considered by the Board in support of its decision, as
described in the Schedule 14D-9 and above, and had no basis to question their
consideration of or reliance on those factors. In reaching their conclusion,
Parent and Purchaser also considered generally the current and historical market
prices for the Shares. Neither Parent nor Purchaser found it practicable to
assign, nor did either of them assign, relative weights to the individual
factors considered in reaching its conclusion as to fairness.
 
ANALYSIS OF FINANCIAL ADVISOR TO PARENT
 
    On January 6, 1997, representatives of Morgan Stanley discussed its written
presentation regarding the Company (the "Morgan Stanley Presentation") with
senior executives of Parent and certain of its affiliates.
 
    The Morgan Stanley Presentation included a premium analysis, an historical
and comparative market overview of the Company, an analysis of precedent
transactions involving certain biotechnology and other companies and a
discounted cash flow analysis of the Company, each of which is summarized below.
Morgan Stanley was not requested to, and did not, render any opinion with
respect to the fairness of the consideration to be paid pursuant to the Offer or
the Merger. Neither Parent nor any of its affiliates imposed any limitations on
the scope of Morgan Stanley's evaluation.
 
    PREMIUM ANALYSIS.  The Morgan Stanley Presentation included a premium
analysis which indicated that the $19.50 per Share to be paid in the Offer and
the Merger represented a 51.5% premium over the April 24, 1996 per Share price
(the price 30 days prior to Parent's initial offer to the Company), a 77.3%
premium over the May 23, 1996 per Share price (the last full trading day prior
to Parent's initial offer to Company), a 17.3% premium over the implied per
Share price of Purchaser's previous investment in the Company made on January
31, 1995 and a 16.4% premium over the January 5, 1996 per Share price (the
latest 12 month high prior to the announcement of Parent's initial offer on May
24, 1996). In addition, the premium analysis indicated that the $19.50 per Share
to be paid in the Offer and the Merger represented a 29.5% premium over the
January 3, 1997 per Share price.
 
                                       13
<PAGE>
    COMPANY HISTORICAL COMMON STOCK PERFORMANCE.  Morgan Stanley's analysis of
the Company's Common Stock performance consisted of an historical analysis of:
(i) the closing prices and trading volumes of the Shares from January 2, 1996 to
January 3, 1997, (ii) the price performance of the Shares compared against the
Tier I Biotech Index (as defined below), the Gene Therapy and Transgenic Index
(as defined below), the Pharmaceutical Index (as defined below) and the Standard
& Poor's 500 Index from May 24, 1996 to January 3, 1997 (the "Post-Offer
Analysis") and (iii) the price performance of the Shares compared against the
foregoing indices from December 2, 1991 to January 3, 1997 (the "Five-Year
Analysis"). The Tier I Biotech Index included the following publicly traded
companies: Amgen Inc., Biogen, Inc., Centocor, Inc., Chiron Corporation,
Genentech, Inc., Genetics Institute, Inc., Gensia, Inc., Genzyme Corporation,
Immunex Corporation and Synergen, Inc. The Gene Therapy and Transgenic Index
included the following companies: Applied Immune Sciences, Inc., Cell Genesys,
Inc., Cellpro Incorporated, Cephalon, Inc., The Immune Response Corporation and
Vical Incorporated. The Pharmaceutical Index included the following companies:
Abbott Laboratories, American Home Products Corporation, Bristol-Myers Squibb
Company, Johnson & Johnson, Eli Lilly and Company, Mark Resources, Inc., Merck &
Co., Inc., Pfizer Inc., Rhone-Poulenc Rorer Inc., Schering-Plough Corporation,
Syntex Corporation, The Upjohn Company and Warner-Lambert Company. Both the
Post-Offer Analysis and the Five-Year Analysis showed that, during the
respective comparison periods, the price performance of each of the indices used
for comparative purposes was superior to the price performance of the Company's
Common Stock.
 
    PRECEDENT TRANSACTION PREMIUM ANALYSIS.  The Morgan Stanley Presentation
summarized the results of Morgan Stanley's precedent transaction premium
analysis. The Morgan Stanley Presentation grouped transactions (without
identifying them by name) in categories identified as biotechnology minority
squeeze-outs, biotechnology 100% control transactions, selected biotechnology
majority partial purchases, minority squeeze-outs generally and selected
biotechnology minority investments, and also analyzed the premiums in the
Rhone-Poulenc Rorer Inc./Applied Immune Sciences, Inc. transaction, the
abandoned American Home Products Corporation/Immunex ("AHP/IMNX") transaction
and in Purchaser's prior investments in the Company. The precedent transaction
premium analysis, excluding the abandoned AHP/ IMNX transaction and Purchaser's
prior investments in the Company, indicated premiums over the unaffected market
price (the price 30 days in advance of public announcement of the transaction),
ranging from 11.0% to 57.9% and premiums over the price one day prior to public
announcement ranging from 14.0% to 67.9%. In the Rhone-Poulenc Rorer/Applied
Immune Sciences, Inc. transaction, the sole precedent transaction where a
majority stockholder acquired the minority interest in a biotechnology company,
the premium over the unaffected market price was 46.9% and the premium over the
price one day prior to public announcement was 67.9%. As part of the precedent
transactions analysis, Morgan Stanley averaged for each category the premium
over the unaffected market price with the premium for such category one day
prior to public announcement, and using such average category premium calculated
an average implied stock price for the Shares. Excluding the abandoned AHP/IMNX
transaction and Purchaser's prior investments in the Company, this analysis
indicated a range of implied prices of from $13.42 to $18.69 per Share.
 
    DISCOUNTED CASH FLOW ANALYSIS.  The Morgan Stanley Presentation included a
discounted cash flow analysis to estimate the present value of the stand-alone
unleveraged free cash flows that the Company may be expected to generate based
upon estimates prepared by Morgan Stanley without access to any recent
confidential information concerning the Company. Morgan Stanley's estimates were
based upon publicly available information and upon financial forecasts prepared
by the Company and examined by Parent in 1993. See "SPECIAL FACTORS -- Company
Financial Projections". The Company currently derives no significant revenues
from the sale of any products for patient treatment. The Company's 1993
forecasts indicated that they did not reflect any assumptions regarding
probability of success of current research and development efforts of the
Company and, consequently, Morgan Stanley revised such forecasts to reflect such
factors. Morgan Stanley's discounted cash flow analysis was based upon estimates
that assumed different probability weightings by year for achieving the
projected financial performance of
 
                                       14
<PAGE>
the Company. Morgan Stanley prepared two different cases, one based on
probability weightings for achieving projected financial performance of 100%
prior to estimated product launch in 2001, 100% for 2001-2002, 75% for 2003 and
50% thereafter (the "Base Case"), and one based on probability weightings for
achieving projected financial performance of 100% prior to estimated product
launch in 2001, 100% for 2001-2002, 50% for 2003 and 33% thereafter (the
"Downside Case"). Morgan Stanley discounted the estimated unleveraged free cash
flows over an eleven-year period ending with the 2007 calendar year using
discount rates of 15.0%, 15.5% and 16.0% and assuming a terminal value based on
a range of net income multiples of 17x to 20x. Unleveraged free cash flows were
calculated as the after-tax operating earnings of the Company (excluding any
interest income or expense) plus depreciation and amortization, plus (or minus)
net changes in non-cash working capital, minus projected capital expenditures.
Morgan Stanley added to the present value of the cash flows the derived terminal
value for the Company in 2007 using the range of net income multiples and
discount rates described above. Assuming the range of discount rates and net
income multiples described above, Morgan Stanley calculated Base Case equity
values per fully diluted Share (assuming the exercise of all Options with an
exercise price less than or equal to $19.50) ranging from $12.62 to $19.72. The
Morgan Stanley analysis showed, however, that small changes in assumptions
regarding the probability of success rate for current research and development
efforts produced significant changes in derived per Share equity values. In the
Downside Case, comparably calculated equity values per fully diluted Share
ranged from $2.70 to $7.24.
 
    A copy of the Morgan Stanley Presentation has been filed as an Exhibit to
the Transaction Statement on Schedule 13E-3 filed with the Commission in
connection with the Offer and the Merger. Copies thereof will be made available
for inspection and copying at the principal executive offices of the Company
during regular business hours by any interested stockholder of the Company, or
his representative who has been so designated in writing, and may also be
obtained in the manner described under "THE TENDER OFFER -- Section 7. Certain
Information Concerning the Company" (except that copies are not available at the
regional offices of the Commission).
 
    The summary set forth above does not purport to be a complete description of
the Morgan Stanley Presentation.
 
    In performing its analyses, Morgan Stanley made numerous assumptions (and
may have deemed various assumptions more or less probable than others) with
respect to industry performance, general business and economic conditions and
other matters, many of which are beyond the control of Parent or the Company.
The analyses performed by Morgan Stanley are not necessarily indicative of
actual values, which may be significantly more or less favorable than those
suggested by such analyses. Such analyses do not purport to be appraisals or to
reflect the prices at which the Company might actually be sold.
 
    In preparing its analyses, Morgan Stanley assumed and relied upon without
independent verification the accuracy and completeness of the information
reviewed for purposes of its presentation. With respect to the financial
forecasts referred to above, Morgan Stanley assumed that they had been
reasonably prepared on bases reflecting the best available estimates and
judgments of the future financial performance of the Company at the time they
were prepared. Morgan Stanley did not make any independent valuation or
appraisal of the assets or liabilities of the Company, nor has it been furnished
with any such appraisals. Morgan Stanley's analyses were necessarily based on
economic, market and other conditions on, and the information made available to
Morgan Stanley as of, the date of its presentation. As described above, the
Morgan Stanley Presentation was one of many factors taken into consideration by
Parent in making its determination to present the Offer. Consequently, the
Morgan Stanley Presentation should not be viewed as determinative of Parent's or
Purchaser's decision to proceed with the Offer and the Merger.
 
    Morgan Stanley is an internationally recognized investment banking and
advisory firm. Morgan Stanley, as part of its investment banking business, is
continuously engaged in the valuation of businesses and securities in connection
with mergers and acquisitions, negotiated underwritings, competitive biddings,
secondary distributions of listed and unlisted securities, private placements
and for corporate and other
 
                                       15
<PAGE>
purposes. Morgan Stanley was retained by Parent as financial advisor to evaluate
a possible acquisition of the Company based upon its qualifications, expertise
and reputation, as well as Morgan Stanley's prior investment banking
relationship and familiarity with Parent and Purchaser.
 
    Morgan Stanley is a full service securities firm engaged in securities
trading and brokerage activities, as well as providing investment banking and
financial advisory services. In the ordinary course of its trading and brokerage
activities, Morgan Stanley or its affiliates may at any time hold long or short
positions, and may trade or otherwise effect transactions for its own account or
the accounts of customers, in debt or equity securities of Parent, Parent's
affiliates or the Company.
 
PURPOSE AND STRUCTURE OF THE OFFER AND THE MERGER; REASONS OF PARENT AND
  PURCHASER FOR THE OFFER AND THE MERGER
 
    The purpose of the Offer and the Merger is for Parent indirectly to acquire
control of, and the entire equity interest in, the Company. The purpose of the
Merger is for Parent indirectly to acquire all Shares not purchased pursuant to
the Offer. Upon consummation of the Merger, the Company will become an indirect
wholly owned subsidiary of Parent. The acquisition of the entire equity interest
in the Company has been structured as a cash tender offer followed by a cash
merger in order to provide a prompt and orderly transfer of ownership of the
Company from the public stockholders to Purchaser and to provide stockholders
with cash for all of their Shares.
 
    Under Delaware Law, the approval of the Board and the affirmative vote of
the holders of a majority of the outstanding Shares are required to approve and
adopt the Merger Agreement and the transactions contemplated thereby, including
the Merger. The Board of Directors of the Company has approved and adopted the
Merger Agreement and the transactions contemplated thereby, and, unless the
Merger is consummated pursuant to the short-form merger provisions under
Delaware Law described below, the only remaining required corporate action of
the Company is the approval and adoption of the Merger Agreement and the
transactions contemplated thereby by the affirmative vote of the holders of a
majority of the Shares. Purchaser already has sufficient voting power to cause
the approval and adoption of the Merger Agreement and the transactions
contemplated thereby without the affirmative vote of any other stockholder of
the Company.
 
    In the Merger Agreement, the Company has agreed to take all action necessary
to convene a meeting of its stockholders as soon as practicable after the
consummation of the Offer for the purpose of considering and taking action on
the Merger Agreement and the transactions contemplated thereby, if such action
is required by Delaware Law. Parent and Purchaser have agreed that all Shares
owned by them and their subsidiaries will be voted in favor of the Merger
Agreement and the transactions contemplated thereby.
 
    Under Delaware Law, if Purchaser acquires, pursuant to the Offer or
otherwise, the number of Shares that, when added to the Shares owned by Parent,
Purchaser or any of their affiliates, equals at least 90% of the Shares then
outstanding, Purchaser will be able to approve the Merger without a vote of the
Company's stockholders. In such event, Parent, Purchaser and the Company have
agreed in the Merger Agreement to take all necessary and appropriate action to
cause the Merger to become effective as soon as reasonably practicable after
such acquisition, without a meeting of the Company's stockholders. Purchaser's
obligation to consummate the Offer is conditioned on there being validly
tendered and not withdrawn at least the number of Shares that, when added to the
10,610,099 Shares owned by Purchaser, shall constitute 90% of the Shares then
outstanding, so as to enable Purchaser to consummate the Merger without a vote
of the Company's stockholders. If, however, fewer than such number of Shares are
validly tendered and not withdrawn, and all other conditions set forth in Annex
A of the Merger Agreement are satisfied, Purchaser may extend the Offer for a
period not to exceed 20 business days after the initial expiration date of the
Offer, after which time Purchaser shall waive the Second Minimum Condition and
acquire such fewer number of Shares (although it may not acquire less than a
majority of the Shares
 
                                       16
<PAGE>
outstanding other than Shares owned by Parent or Purchaser without the consent
of a majority of the Independent Directors). In such case, a vote of the
Company's stockholders will be required under Delaware Law, and a significantly
longer period of time will be required to effect the Merger.
 
    Parent believes that cell and cell-based gene therapy will become a major
component of medical treatment of major disorders of the blood and immune system
during the next century. Parent believes that the Company is one of the leaders
in cellular gene therapy research and that its technology and personnel could
provide Parent with a platform for developing this technology. Because of
Parent's leading role in the pharmaceuticals industry, its development resources
and its worldwide distribution network, Parent believes that it offers the
Company a greatly enhanced opportunity to develop and market commercially viable
products.
 
    Parent considered various means of expanding its collaboration with the
Company, including attempting to achieve such an alignment or integration
through an expansion of the parties' commercial relationship without increasing
Parent's ownership of Shares and through such an expansion of the commercial
relationship coupled with some increase in Parent's ownership of Shares. Parent
concluded, however, that these approaches would not enable Parent to take full
advantage of market opportunities and to achieve the desired level of technology
exchange and cooperation. Parent concluded that these benefits were most likely
to be achieved if the Company were under common control with Parent, so that
their efforts could be jointly directed without the conflicts of interest that
might otherwise arise. Consequently, Parent concluded that an acquisition by
Parent of the entire equity interest in the Company should be considered. Parent
chose to undertake the transaction at this time because the businesses in which
Parent and the Company operate are subject to rapid change and Parent wished to
take advantage of commercial opportunities that might no longer be available at
a later time.
 
PLANS FOR THE COMPANY AFTER THE OFFER AND THE MERGER; CERTAIN EFFECTS OF THE
  OFFER
 
    Pursuant to the Merger Agreement, upon completion of the Offer, Parent and
Purchaser intend to effect the Merger in accordance with the terms of the Merger
Agreement. See "SPECIAL FACTORS -- The Merger Agreement".
 
    Parent's management has begun, and intends to continue, a review of the
Company and its assets, corporate structure, capitalization, operations,
properties, policies, management and personnel to determine what changes, if
any, would be desirable in order best to organize and integrate the activities
of the Company and Parent. Parent and Purchaser expressly reserve the right to
make any changes that they deem necessary or appropriate in light of their
review or in light of future developments or that would be desirable to permit
Parent more effectively to manage the Company and function more efficiently as
an integrated worldwide enterprise. Except as otherwise disclosed in this Offer
to Purchase, Parent has no present plans or proposals that would result in an
extraordinary corporate transaction involving the Company or any of its
subsidiaries, such as a merger, reorganization, liquidation, relocation of
operations, or sale or transfer of a material amount of assets.
 
    As a result of the Offer, the interest of Parent in the Company's net book
value and net earnings will increase to the extent of the number of Shares
acquired under the Offer. If the Merger is consummated, Parent's interest in
such items will increase to 100% and Parent and its subsidiaries will be
entitled to all benefits resulting from that interest, including all income
generated by the Company's operations and any future increase in the Company's
value. Similarly, Parent will also bear the risk of losses generated by the
Company's operations and any decrease in the value of the Company after the
Merger. Upon consummation of the Merger, the Surviving Corporation will become a
privately held corporation. Accordingly, stockholders will not have the
opportunity to participate in the earnings and growth of the Surviving
Corporation after the Merger and will not have any right to vote on corporate
matters. Similarly, stockholders will not face the risk of losses generated by
the Company's operations or decline in the value of the Company after the
Merger.
 
                                       17
<PAGE>
    Following the consummation of the Merger, the Shares will no longer be
quoted on NASDAQ and the registration of the Shares under the Securities
Exchange Act of 1934 (the "Exchange Act") will be terminated. Accordingly,
following the Merger there will be no publicly traded equity securities of the
Company outstanding and the Company will no longer be required to file periodic
reports with the Commission. See "THE TENDER OFFER -- Section 11. Effect of the
Offer on the Market for Shares; NASDAQ Quotation and Exchange Act Registration".
It is expected that, if Shares are not accepted for payment by Purchaser
pursuant to the Offer and the Merger is not consummated, the Company's current
management, under the general direction of the Board, will continue to manage
the Company as an ongoing business.
 
RIGHTS OF STOCKHOLDERS IN THE MERGER
 
    No appraisal rights are available in connection with the Offer. However, if
the Merger is consummated, stockholders who have not tendered their Shares will
have certain rights under Delaware Law to dissent and demand appraisal of, and
to receive payment in cash of the fair value of, their Shares. Such rights to
dissent, if the statutory procedures are complied with, could lead to a judicial
determination of the fair value of the Shares, as of the day prior to the date
on which the stockholders' vote was taken approving the Merger or similar
business combination (excluding any element of value arising from the
accomplishment or expectation of the Merger), required to be paid in cash to
such dissenting holders for their Shares. In addition, such dissenting
stockholders would be entitled to receive payment of a fair rate of interest
from the date of consummation of the Merger on the amount determined to be the
fair value of their Shares. In determining the fair value of the Shares, the
court is required to take into account all relevant factors. Accordingly, such
determination could be based upon considerations other than, or in addition to,
the market value of the Shares, including, among other things, asset values and
earning capacity. In WEINBERGER V. UOP, INC., the Delaware Supreme Court stated,
among other things, that "proof of value by any techniques or methods which are
generally considered acceptable in the financial community and otherwise
admissible in court" should be considered in an appraisal proceeding. Therefore,
the value so determined in any appraisal proceeding could be the same as or more
or less than the purchase price per Share in the Offer or the Merger
Consideration.
 
    In addition, several decisions by Delaware courts have held that, in certain
circumstances, a controlling stockholder of a company involved in a merger has a
fiduciary duty to other stockholders which requires that the merger be fair to
such other stockholders. In determining whether a merger is fair to minority
stockholders, Delaware courts have considered, among other things, the type and
amount of consideration to be received by the stockholders and whether there was
fair dealing among the parties. The Delaware Supreme Court stated in WEINBERGER
and RABKIN V. PHILIP A. HUNT CHEMICAL CORP. that the remedy ordinarily available
to minority stockholders in a cash-out merger is the right to appraisal
described above. However, a damages remedy or injunctive relief may be available
if a merger is found to be the product of procedural unfairness, including
fraud, misrepresentation or other misconduct.
 
    See Schedule III attached hereto for a description of appraisal rights under
Delaware Law, as well as a reproduction of the text of Section 262 of Delaware
Law.
 
THE MERGER AGREEMENT
 
    The following is a summary of the Merger Agreement, a copy of which is filed
as an Exhibit to the Schedule 14D-1 filed by Purchaser and Parent with the
Commission in connection with the Offer. Such summary is qualified in its
entirety by reference to the Merger Agreement.
 
    THE OFFER.  The Merger Agreement provides for the commencement of the Offer
as promptly as reasonably practicable after the date thereof, but in no event
later than five business days after the initial public announcement of
Purchaser's intention to commence the Offer. Purchaser shall not, without the
consent of a majority of the Independent Directors, accept for payment any
Shares tendered pursuant to
 
                                       18
<PAGE>
the Offer unless at least a majority of the then issued and outstanding Shares,
other than Shares owned by Parent and Purchaser, shall have been validly
tendered and not withdrawn prior to the expiration of the Offer. The obligation
of Purchaser to accept for payment and pay for Shares tendered pursuant to the
Offer is subject to the satisfaction of the Second Minimum Condition and certain
other conditions that are described in "THE TENDER OFFER -- Section 12. Certain
Conditions of the Offer" hereof. Purchaser and Parent have agreed that no change
in the Offer may be made which decreases the price per Share payable in the
Offer or which reduces the maximum number of Shares to be purchased in the Offer
or which imposes conditions to the Offer in addition to those set forth in "THE
TENDER OFFER -- Section 12. Certain Conditions of the Offer". Pursuant to the
Merger Agreement, in the event all conditions set forth in the Merger Agreement
shall have been satisfied other than the Second Minimum Condition, Purchaser may
extend the Offer for a period or periods aggregating not more than 20 business
days after the later of (i) the initial expiration date of the Offer and (ii)
the date on which all other conditions set forth in the Merger Agreement shall
have been satisfied, after which time (or earlier if Parent does not extend the
Offer) Purchaser shall waive the Second Minimum Condition and consummate the
Offer.
 
    THE MERGER.  The Merger Agreement provides that, upon the terms and subject
to the conditions thereof, and in accordance with Delaware Law, at the Effective
Time, Purchaser shall be merged with and into the Company. As a result of the
Merger, the separate corporate existence of Purchaser will cease and the Company
will continue as the Surviving Corporation of the Merger and will become an
indirect wholly owned subsidiary of Parent. Upon consummation of the Merger,
each issued and then outstanding Share (other than any Shares held in the
treasury of the Company or owned by Purchaser, Parent or any direct or indirect
wholly owned subsidiary of Parent or the Company, and other than Shares held by
stockholders who shall not have voted in favor of the Merger or consented
thereto in writing and who shall have demanded properly in writing appraisal for
such Shares in accordance with Section 262 of Delaware Law) shall be cancelled
and shall be converted automatically into the right to receive the Merger
Consideration.
 
    Pursuant to the Merger Agreement, each share of common stock, par value $.01
per share, of Purchaser issued and outstanding immediately prior to the
Effective Time shall be converted into and exchanged for one validly issued,
fully paid and nonassessable share of common stock, par value $.01 per share, of
the Surviving Corporation.
 
    The Merger Agreement provides that the directors of Purchaser immediately
prior to the Effective Time will be the initial directors of the Surviving
Corporation and that the officers of the Company immediately prior to the
Effective Time will be the initial officers of the Surviving Corporation. The
Merger Agreement provides that, at the Effective Time, the Certificate of
Incorporation of Purchaser will be the Certificate of Incorporation of the
Surviving Corporation; PROVIDED, HOWEVER, that, at the Effective Time, Article I
of the Certificate of Incorporation of the Surviving Corporation will be amended
to read as follows: "The name of the corporation is SyStemix, Inc." The Merger
Agreement also provides that the By-laws of Purchaser will be the By-laws of the
Surviving Corporation.
 
    Immediately prior to the Effective Time, each outstanding option and warrant
to purchase Shares (in each case, a "Stock Option"), whether or not then
exercisable, may be surrendered by the holder of such Stock Option for
cancellation by the Company, and each holder of a cancelled Stock Option shall
be entitled to receive an amount in cash from Purchaser, in consideration for
the cancellation of each such Stock Option, at the same time as the Merger
Consideration is received by the holders of Shares, equal to the product of (i)
the number of Shares to be issued upon the exercise of such Stock Option and
(ii) the excess, if any, of the amount paid per Share pursuant to the Offer over
the exercise price per Share previously subject to such Stock Option; PROVIDED,
HOWEVER, that any Stock Options owned by Purchaser, Parent or any direct or
indirect wholly owned subsidiary of Parent or of the Company immediately prior
to the Effective Time shall be cancelled without any conversion thereof and no
payment or distribution shall be made with respect thereto. The Company shall
use all reasonable efforts to obtain such consents as may
 
                                       19
<PAGE>
be necessary or required so that, immediately prior to the Effective Time, each
Stock Option may be and shall be cancelled by the Company.
 
    Purchaser or the designated paying agent shall be entitled to deduct and
withhold from the consideration otherwise payable pursuant to the Merger
Agreement to any holder of Shares and/or Stock Options such amounts that
Purchaser or the paying agent is required to deduct and withhold with respect to
the making of such payment under the United States Internal Revenue Code of
1986, as amended, the rules and regulations promulgated thereunder or any
provision of state, local or foreign tax law.
 
    AGREEMENTS OF PARENT, PURCHASER AND THE COMPANY.  Pursuant to the Merger
Agreement, the Company shall, if required by applicable law in order to
consummate the Merger, duly call, give notice of, convene and hold an annual or
special meeting of its stockholders as soon as practicable following
consummation of the Offer for the purpose of considering and taking action on
the Merger Agreement and the transactions contemplated thereby (the
"Stockholders' Meeting"). At the Stockholders' Meeting, Parent and Purchaser
shall cause all Shares then owned by them to be voted in favor of the approval
and adoption of the Merger Agreement and the transactions contemplated thereby.
Purchaser currently has sufficient voting power to approve the Merger, even if
no other stockholder votes in favor of the Merger. In the event that Purchaser
acquires such number of Shares that, when taken together with the Shares
previously owned by Purchaser, constitute at least 90% of the then outstanding
Shares, the parties have agreed to take all necessary and appropriate action to
cause the Merger to become effective, in accordance with Section 253 of Delaware
Law, as soon as reasonably practicable after such acquisition, without a meeting
of the stockholders of the Company.
 
    The Merger Agreement provides that the Company shall, if required by
applicable law, as soon as practicable following consummation of the Offer, file
a proxy statement with the Commission under the Exchange Act (the "Proxy
Statement"), and shall use its best efforts to have the Proxy Statement cleared
by the Commission. Parent, Purchaser and the Company shall cooperate with each
other in the preparation of the Proxy Statement, and the Company shall notify
Parent of the receipt of any comments of the Commission with respect to the
Proxy Statement and of any requests by the Commission for any amendment or
supplement thereto or for additional information and shall provide to Parent
promptly copies of all correspondence between the Company or any representative
of the Company and the Commission. The Company shall give Parent and its counsel
the opportunity to review the Proxy Statement prior to its being filed with the
Commission and shall give Parent and its counsel the opportunity to review all
amendments and supplements to the Proxy Statement and all responses to requests
for additional information and replies to comments prior to their being filed
with, or sent to, the Commission. The Company and its counsel shall be given the
opportunity to review and comment on the Offer documents and any amendments
thereto prior to the filing thereof with the Commission. Parent and Purchaser
shall provide the Company and its counsel with a copy of any written comments or
telephonic notification of any verbal comments Parent or Purchaser may receive
from the Commission or its staff with respect to the Offer documents promptly
after the receipt thereof and shall provide the Company and its counsel with a
copy of any written responses and telephonic notification of any verbal
responses of Parent, Purchaser or their counsel. Each of the Company, Parent and
Purchaser agrees to use its reasonable best efforts, after consultation with the
other parties, to respond promptly to all such comments of and requests by the
Commission and to cause the Proxy Statement and all required amendments and
supplements thereto to be mailed to the holders of Shares entitled to vote at
the Stockholders' Meeting at the earliest practicable time.
 
    Pursuant to the Merger Agreement, the Company has covenanted and agreed
that, between the date of the Merger Agreement and the Effective Time, unless
Parent shall otherwise agree in writing, the businesses of the Company and its
subsidiaries shall be conducted only in, and the Company shall not take any
action except in, the ordinary course of business and in a manner consistent
with past practice; and the Company shall use its best efforts to preserve
substantially intact the business organization of the Company and its
subsidiaries, to keep available the services of the current officers, employees
and consultants of the
 
                                       20
<PAGE>
Company and its subsidiaries and to preserve the current relationships of the
Company and its subsidiaries with customers, suppliers and other persons with
which the Company or any of its subsidiaries has significant business relations.
 
    The Company and Parent are each obligated under the Merger Agreement to give
each other prompt notice of (i) the occurrence, or non-occurrence, of any event
the occurrence, or non-occurrence, of which would be likely to cause any
representation or warranty contained in the Merger Agreement to be untrue or
inaccurate and (ii) any failure of the Company, Parent or Purchaser, as the case
may be, to comply with or satisfy any covenant, condition or agreement to be
complied with or satisfied by it thereunder.
 
    Pursuant to the Merger Agreement, the By-laws of the Surviving Corporation
shall contain provisions no less favorable with respect to indemnification than
those set forth in Article XV of the By-laws of the Company, which provisions
shall not be amended, repealed or otherwise modified for a period of six years
from the Effective Time in any manner that would affect adversely the rights
thereunder of individuals who at the Effective Time were directors, officers,
employees, fiduciaries or agents of the Company, unless such modification shall
be required by law.
 
    Pursuant to the Merger Agreement, the Company shall, to the fullest extent
permitted under applicable law and regardless of whether the Merger becomes
effective, indemnify and hold harmless, and, after the Effective Time, the
Surviving Corporation shall, to the fullest extent permitted under applicable
law, indemnify and hold harmless, each present and former director, officer,
employee, fiduciary and agent of the Company and each of its subsidiaries and
each fiduciary and agent of each such director and officer (collectively, the
"Indemnified Parties") against all costs and expenses (including attorneys'
fees), judgments, fines, losses, claims, damages, liabilities and settlement
amounts paid in connection with any claim, action, suit, proceeding or
investigation (whether arising before or after the Effective Time), whether
civil, criminal, administrative or investigative, arising out of or pertaining
to any action or omission in their capacity as an officer, director, employee,
fiduciary or agent, whether occurring before or after the Effective Time, until
the expiration of the statute of limitations relating thereto (and shall pay any
expenses in advance of the final disposition of such action or proceeding to
each Indemnified Party to the fullest extent permitted under Delaware Law, upon
receipt from the Indemnified Party to whom expenses are advanced of any
undertaking to repay such advances required under Delaware Law). In the event of
any such claim, action, suit, proceeding or investigation, (i) the Company or
the Surviving Corporation, as the case may be, shall pay the reasonable fees and
expenses of counsel selected by the Indemnified Parties, which counsel shall be
reasonably satisfactory to the Company or the Surviving Corporation, promptly
after statements therefor are received and (ii) the Company and the Surviving
Corporation shall cooperate in the defense of any such matter; PROVIDED,
HOWEVER, that neither the Company nor the Surviving Corporation shall be liable
for any settlement effected without its written consent (which consent shall not
be unreasonably withheld); and PROVIDED FURTHER that neither the Company nor the
Surviving Corporation shall be obligated to pay the fees and expenses of more
than one counsel (plus appropriate local counsel) for all Indemnified Parties in
any single action except (x) that the persons who served as directors of the
Company who were not designees of Parent shall be entitled to retain one
additional counsel (plus appropriate local counsel) to represent them at the
expense of the Company or the Surviving Corporation, and (y) to the extent that
two or more of such Indemnified Parties shall have conflicting interests in the
outcome of such action, in which case such additional counsel (including local
counsel) as may be required to avoid any such conflict or likely conflict may be
retained by the Indemnified Parties at the expense of the Company or the
Surviving Corporation; and PROVIDED FURTHER that, in the event that any claim
for indemnification is asserted or made within the period prior to the
expiration of the applicable statute of limitations, all rights to
indemnification in respect of such claim shall continue until the disposition of
such claim. Parent has agreed to guarantee the foregoing obligations of the
Surviving Corporation and, following consummation of the Offer, the Company.
 
    The Merger Agreement provides that the Surviving Corporation shall use its
reasonable efforts to maintain in effect for six years from the Effective Time,
if available, the current directors' and officers'
 
                                       21
<PAGE>
liability insurance policies maintained by the Company (provided that the
Surviving Corporation may substitute therefor policies of at least the same
coverage containing terms and conditions which are not materially less
favorable) with respect to matters occurring prior to the Effective Time;
PROVIDED, HOWEVER, that in no event shall the Surviving Corporation be required
to expend more than an amount per year equal to 175% of current annual premiums
paid by the Company for such insurance. In the event that, but for the proviso
to the immediately preceding sentence, the Surviving Corporation would be
required to expend more than 175% of current annual premiums, the Surviving
Corporation shall obtain the maximum amount of such insurance obtainable by
payment of annual premiums equal to 175% of current annual premiums. In the
event the Company or the Surviving Corporation or any of their respective
successors or assigns (i) consolidates with or merges into any other person and
shall not be the continuing or surviving corporation or entity of such
consolidation or merger or (ii) transfers all or substantially all of its
properties and assets to any person, then, and in each such case, proper
provision shall be made so that the successors and assigns of the Company or the
Surviving Corporation, as the case may be, or at Parent's option, Parent, shall
assume the foregoing indemnification obligations.
 
    Pursuant to the terms of the Merger Agreement and subject to the conditions
thereof, each of the parties thereto shall (i) use its reasonable best efforts
to take, or cause to be taken, all appropriate action, and to do, or cause to be
done, all things necessary, proper or advisable under applicable laws and
regulations to consummate and make effective the transactions contemplated by
the Merger Agreement, including, without limitation, using its reasonable best
efforts to obtain all licenses, permits, consents, approvals, authorizations,
qualifications and orders of governmental authorities and parties to contracts
with the Company and its subsidiaries as are necessary for the consummation of
the transactions and to fulfill the conditions to the Offer and the Merger. In
case at any time after the Effective Time any further action is necessary or
desirable to carry out the purposes of the Merger Agreement, the proper officers
and directors of each party to the Merger Agreement and the Surviving
Corporation shall use their reasonable best efforts to take all such action.
 
    Pursuant to the Merger Agreement, the parties thereto agreed that each of
the Acquisition Agreement and the Stock and Warrant Purchase Agreement shall be
terminated as of the Effective Time. For purposes of clarity, it is understood
by the parties that all representations, warranties and agreements between the
parties which, by the terms of such agreements, survive either or both the
Closing Date (as that term is defined in each of the Acquisition Agreement and
the Stock and Warrant Purchase Agreement) or the termination of such agreements
shall all be terminated as of the Effective Time.
 
    REPRESENTATIONS AND WARRANTIES.  The Merger Agreement contains various
customary representations and warranties of the parties thereto, including
representations by the Company, Parent and Purchaser as to the enforceability of
the Merger Agreement and by the Company as to the absence of certain changes or
events concerning the Company's business, compliance with law, corporate status
and capitalization and the accuracy of financial statements and filings with the
Commission.
 
    CONDITIONS TO THE MERGER.  Under the Merger Agreement, the respective
obligations of each party to effect the Merger are subject to the satisfaction
at or prior to the Effective Time of the following conditions: (a) to the extent
required by Delaware Law and the Company's Certificate of Incorporation, the
Merger Agreement and the transactions contemplated thereby shall have been
approved and adopted by the affirmative vote of the stockholders of the Company;
(b) no foreign, United States or state governmental authority or other agency or
commission or foreign, United States or state court of competent jurisdiction
shall have enacted, issued, promulgated, enforced or entered any law, rule,
regulation, executive order, decree, injunction or other order (whether
temporary, preliminary or permanent) which is then in effect and has the effect
of: (i) making the acquisition of Shares by Parent or Purchaser or any affiliate
of either of them illegal or otherwise restricting, preventing or prohibiting
consummation of the transactions contemplated by the Merger Agreement, (ii)
seeking to prohibit or limit materially the ownership or operation by the
Company, Parent or any of their respective subsidiaries of all or any material
portion of the business or assets of the Company, Parent or any of their
respective
 
                                       22
<PAGE>
subsidiaries as a result of the transactions contemplated by the Merger
Agreement or (iii) compelling the Company, Parent, Purchaser or any of their
respective subsidiaries to dispose of or hold separate all or any material
portion of the business or assets of the Company, Parent or Purchaser or any of
their respective subsidiaries as a result of the transactions contemplated by
the Merger Agreement; and (c) Purchaser or its permitted assignee shall have
purchased all Shares validly tendered and not withdrawn pursuant to the Offer;
PROVIDED, HOWEVER, that this condition shall not be applicable to the
obligations of Parent or Purchaser if, in breach of the Merger Agreement,
Purchaser fails to purchase any Shares validly tendered and not withdrawn
pursuant to the Offer.
 
    TERMINATION; FEES AND EXPENSES.  The Merger Agreement may be terminated and
the Merger and the other transactions may be abandoned at any time prior to the
Effective Time, notwithstanding any requisite approval and adoption of the
Merger Agreement and the transactions contemplated thereby by the stockholders
of the Company: (a) by mutual written consent duly authorized by the Boards of
Directors of Parent, Purchaser and the Company, if such termination is also
approved by a majority of the Independent Directors; or (b) by either Parent,
Purchaser or the Company if (i) the Effective Time shall not have occurred on or
before June 30, 1997; PROVIDED, HOWEVER, that such right to terminate shall not
be available to any party whose failure to fulfill any obligation under the
Merger Agreement has been the cause of, or resulted in, the failure of the
Effective Time to occur on or before such date or (ii) any court of competent
jurisdiction or other governmental authority shall have issued an order, decree,
ruling or taken any other action restraining, enjoining or otherwise prohibiting
the Merger and such order, decree, ruling or other action shall have become
final and nonappealable; or (c) by Parent if due to an occurrence or
circumstance that would result in a failure to satisfy any condition to the
Offer, Purchaser shall have (i) failed to commence the Offer within 60 days
following the date of the Merger Agreement, (ii) terminated the Offer without
having accepted any Shares for payment thereunder or (iii) failed to pay for
Shares pursuant to the Offer within 90 days following the commencement of the
Offer, unless such failure to pay for Shares shall have been caused by or
resulted from the failure of Parent or Purchaser to perform in any material
respect any material covenant or agreement of either of them contained in the
Merger Agreement or the material breach by Parent or Purchaser of any material
representation or warranty of either of them contained in the Merger Agreement;
or (d) by the Company, upon approval of the Board and a majority of the
Independent Directors, if due to an occurrence or circumstance that would result
in a failure to satisfy any of the conditions to the Offer, Purchaser shall have
(i) failed to commence the Offer within 60 days following the date of the Merger
Agreement, (ii) terminated the Offer without having accepted any Shares for
payment thereunder or (iii) failed to pay for Shares pursuant to the Offer
within 90 days following the commencement of the Offer, unless such failure to
pay for Shares shall have been caused by or resulted from the failure of the
Company to perform in any material respect any material covenant or agreement of
it contained in the Merger Agreement or the material breach by the Company of
any material representation or warranty of it contained in the Merger Agreement;
or (e) by the Company, upon approval of the Board and a majority of the
Independent Directors, (i) if any representation or warranty of Parent and
Purchaser in the Merger Agreement which is qualified as to materiality shall not
be true and correct or any such representation or warranty that is not so
qualified shall not be true and correct in any material respect, in each case as
if such representation or warranty was made as of such time on or after the date
of the Merger Agreement, or (ii) Parent or Purchaser shall have failed to
perform in any material respect any obligation or to comply in any material
respect with any agreement or covenant of Parent or Purchaser to be performed or
complied with by it under the Merger Agreement.
 
    In the event of the termination of the Merger Agreement, the Merger
Agreement shall forthwith become void.
 
    Except as set forth below, all costs and expenses incurred in connection
with the Merger Agreement and the transactions contemplated thereby shall be
paid by the party incurring such fees and expenses, whether or not the
transactions contemplated by the Merger Agreement are consummated.
 
                                       23
<PAGE>
    In the event that the Merger Agreement is terminated prior to consummation
of the Offer and the Merger, other than a termination by the consent of the
parties or a termination by Parent or Purchaser which results from any
representation or warranty of the Company in the Merger Agreement not being true
and correct or the failure of the Company to perform any obligation or to comply
with any agreement or covenant of the Company to be performed or complied with
by it under the Merger Agreement, then, in any such event, Purchaser shall, and
Parent shall cause Purchaser to, pay all actual out-of-pocket fees and expenses
incurred by the parties, including all fees and expenses payable to investment
banking firms, counsel and accountants, in connection with the structuring,
negotiation, preparation, execution and performance of the Merger Agreement, as
well as all printing and advertising expenses.
 
INTERESTS OF CERTAIN PERSONS IN THE OFFER AND THE MERGER
 
    In considering the recommendation of the Board and the Independent Directors
with respect to the Offer and the Merger and the fairness of the consideration
to be received in the Offer and the Merger, stockholders should be aware that
certain officers and directors of the Company have interests in the Offer and
the Merger which are described below and which may present them with certain
potential conflicts of interest. Stockholders also should be aware that Parent
and Purchaser have certain interests that present actual or potential conflicts
of interest in connection with the Offer and the Merger. As a result of
Purchaser's current ownership of approximately 73.2% of the outstanding Shares
and its nominees constituting a majority of the Company's directors, Purchaser
may be deemed to control the Company. The Board was aware of these actual and
potential conflicts of interest and considered them along with the other matters
described under "SPECIAL FACTORS -- Recommendation of the Company's Board;
Fairness of the Offer and the Merger".
 
    Parent and Purchaser have not been advised by the executive officers,
directors or affiliates of the Company whether any of such persons intends to
tender Shares owned by them pursuant to the Offer.
 
    STOCK AND STOCK OPTION OWNERSHIP.  Purchaser owns (i) 5,993,827 Shares which
it acquired pursuant to the Acquisition Agreement, (ii) 4,616,272 Shares which
it acquired pursuant to the Stock and Warrant Purchase Agreement and (iii)
Warrants to acquire 1,367,600 Shares which it acquired pursuant to the Stock and
Warrant Purchase Agreement. Assuming exercise of the Warrants, Purchaser would
beneficially own 11,977,699 Shares, representing approximately 67% of the Shares
outstanding on a fully diluted basis and 75.5% of the Shares outstanding.
Assuming no exercise of the Warrants, Purchaser would own 10,610,099 Shares,
representing 64.3% of the Shares outstanding on a fully diluted basis and 73.2%
of the Shares outstanding.
 
                                       24
<PAGE>
BENEFICIAL OWNERSHIP OF COMMON STOCK
 
    The following table sets forth certain information, as of January 10, 1997,
regarding the ownership of Common Stock by each person known by the Company to
be the beneficial owner of more than 5% of the outstanding Common Stock, each
director of the Company, the Chief Executive Officer of the Company, the other
officers of the Company, and all executive officers and directors of the Company
as a group:
 
<TABLE>
<CAPTION>
                                                                               NUMBER OF SHARES     PERCENTAGE OF
                                                                                OF COMMON STOCK     COMMON STOCK
                                   NAME OF                                       BENEFICIALLY       BENEFICIALLY
                              BENEFICIAL OWNER                                       OWNED              OWNED
- -----------------------------------------------------------------------------  -----------------  -----------------
<S>                                                                            <C>                <C>
Novartis Biotech Holding Corp.(1)............................................       11,977,699(3)          75.5%
Morgan Guaranty Trust Company of New York(2).................................        1,251,871              8.6%
Iris Brest...................................................................            6,550(4)             *
Linda M. Burch...............................................................           43,155(5)             *
James T. DePalma.............................................................            6,100(6)             *
Harold Edgar.................................................................           50,214(7)             *
Edgar J. Fullager............................................................               --(8)        --
Stephan Guttmann, Ph.D.......................................................               --(8)        --
Paul Herrling, Ph.D..........................................................               --(8)        --
Wendy R. Hitchcock...........................................................           15,374(9)             *
Audrey F. Jakubowski, M.D....................................................            1,500(10)             *
Christopher A. Juttner, M.D..................................................            7,000(11)             *
Didier L. Lanson, Ph.D.......................................................           16,497(12)             *
Hugh Lewis...................................................................           19,442(13)             *
Fred J. Meyer................................................................            7,834(8 14)             *
Ulrich Oppikofer, Ph.D.......................................................               --(8)        --
Joseph J. Ruvane, Jr.........................................................           55,862(15)             *
Edgar Schollmaier............................................................               --(16)        --
John J. Schwartz, Ph.D.......................................................          177,326(17)           1.2%
Roland G. Scollay, Ph.D......................................................            1,500(18)             *
Daniel L. Vasella, M.D.......................................................               --(8)        --
Irving L. Weissman, M.D......................................................          158,062(19)           1.1%
All directors and executive officers as a group (20 persons).................          566,416(20)           3.9%
</TABLE>
 
- ------------------------
 
    * Represents less than 1%.
 
  (1) Purchaser is an indirect wholly owned subsidiary of Parent. The address of
      the principal executive offices of Parent is Schwarzwaldallee 215,
      CH-4002, Basle, Switzerland.
 
  (2) The address of the principal executive offices of Morgan Guaranty Trust
      Company of New York is 60 Wall Street, New York, NY 10260.
 
  (3) Represents 10,610,099 Shares and Warrants to purchase 1,367,600 Shares.
 
  (4) Includes 4,750 Shares purchasable upon the exercise of stock options
      granted pursuant to the Company's stock option plans, which are
      exercisable or become so within 60 days of January 10, 1997 ("Presently
      Exercisable Options"). Ms. Brest also holds options to purchase 19,539
      Shares which are not Presently Exercisable Options.
 
  (5) Includes 38,155 Presently Exercisable Options. Ms. Burch also holds
      options to purchase 28,265 Shares which are not Presently Exercisable
      Options.
 
  (6) Represents Presently Exercisable Options. Mr. DePalma also holds 8,448
      Shares which are not Presently Exercisable Options.
 
                                       25
<PAGE>
  (7) Includes 41,939 Presently Exercisable Options. Mr. Edgar also holds
      options to purchase 7,500 Shares which are not Presently Exercisable
      Options.
 
  (8) Excludes 11,977,699 Shares beneficially held by Purchaser of which such
      person may be considered an affiliate. Such person disclaims beneficial
      ownership of any shares held by Purchaser or its affiliates.
 
  (9) Includes 13,374 Shares of Presently Exercisable Options. Ms. Hitchcock
      also holds 23,233 Shares which are not Presently Exercisable Options.
 
 (10) Dr. Jakubowski also holds 20,000 Shares which are not Presently
      Exercisable Options.
 
 (11) Includes 5,000 Presently Exercisable Options. Dr. Juttner also holds
      options to purchase 20,781 Shares which are not Presently Exercisable
      Options.
 
 (12) Includes 14,694 Presently Exercisable Options. Dr. Lanson also holds
      options to purchase 14,689 Shares which are not Presently Exercisable
      Options.
 
 (13) Includes 17,942 Presently Exercisable Options. Mr. Lewis also holds 23,927
      Shares which are not Presently Exercisable Options.
 
 (14) Represents Presently Exercisable Options. Mr. Meyer also holds options to
      purchase 13,125 Shares which are not Presently Exercisable Options.
 
 (15) Represents Presently Exercisable Options. Mr. Ruvane also holds options to
      purchase 7,500 Shares which are not Presently Exercisable Options.
 
 (16) Mr. Schollmaier holds options to purchase 13,463 Shares which are not
      Presently Exercisable Options.
 
 (17) Includes 146,326 Presently Exercisable Options. Dr. Schwartz also holds
      options to purchase 99,161 Shares which are not Presently Exercisable
      Options.
 
 (18) Dr. Scollay also holds 18,000 Shares which are not Presently Exercisable
      Options.
 
 (19) Includes 13,459 Presently Exercisable Options. Dr. Weissman also holds
      options to purchase 7,500 Shares which are not Presently Exercisable
      Options.
 
 (20) Includes 365,438 Presently Exercisable Options.
 
RELATED PARTY TRANSACTIONS
 
    In April 1993, the Company entered into an agreement with the Sandoz
entities to form the Progenesys joint venture with a primary mission to research
and develop hematopoietic cell-based, somatic gene therapies against HIV
infection. The Company and the Sandoz entities licensed certain initial
technologies, within the field, to Progenesys. On August 31, 1995, the
Progenesys partnership was dissolved and replaced by the HIV Gene Therapy
Collaboration between the Company and the Sandoz entities, with terms and
conditions substantially equivalent to those of the partnership agreement. For
the year ended December 31, 1995 (through the date of dissolution), the
Company's share of Progenesys' operating loss was $2.94 million. Revenue earned
by the Company under the HIV Gene Therapy Collaboration was $1.94 million for
the year ended December 31, 1995.
 
    In November 1993, the Company entered into a two-year collaboration
agreement with Parent regarding therapeutic anti-viral agents for HIV infection.
The collaboration focused on the underlying pathogenic mechanisms of HIV
disease, the identification of new potential targets for anti-viral therapy and
the IN VIVO testing of anti-HIV agents under development. The Company and Parent
jointly decided to terminate the agreement as of March 31, 1995. Revenue earned
by the Company under the agreement for the year ended December 31, 1995, was
$250,000.
 
                                       26
<PAGE>
    In March 1994, the Company and Parent agreed to provide funding for a
portion of the research carried out at Stanford University School of Medicine.
The research is directed by Dr. Irving Weissman as Principal Investigator. Dr.
Weissman, a faculty member at Stanford University, is a director, consultant and
chairman of the scientific advisory board of the Company. The agreement provides
that the Company and Parent have the right to negotiate with Stanford for a
license on commercially reasonable terms for intellectual property, if any, that
results from the funding. As amended, the agreement provides for funding through
December 31, 1995. The Company provided $796,000 of funding in 1995. The Company
provided $150,000 of funding and has contributed certain in-kind services during
1996. The agreement has been extended through August 1997.
 
FEES AND EXPENSES
 
    The following is an estimate of expenses to be incurred in connection with
the Offer and the Merger, other than: (i) the fees and expenses of Lehman
Brothers (see "SPECIAL FACTORS -- Opinion of Lehman Brothers" and "THE TENDER
OFFER -- Section 14. Fees and Expenses"); and (ii) the fees and expenses of
Morgan Stanley (see "SPECIAL FACTORS -- Analysis of Financial Advisor to Parent"
and "THE TENDER OFFER -- Section 14. Fees and Expenses"). The Merger Agreement
provides that all costs and expenses incurred in connection with the Offer and
the Merger will be paid by the party incurring such costs and expenses, unless
the Merger Agreement is terminated prior to consummation of the Offer and the
Merger (other than a termination by the consent of the parties or a termination
by Parent or Purchaser which results from any representation or warranty of the
Company in the Merger Agreement not being true and correct or the failure of the
Company to perform any obligation or to comply with any agreement or covenant of
the Company to be performed or complied with by it under the Merger Agreement),
in which case Purchaser shall, and Parent shall cause Purchaser to, pay all
actual out-of-pocket fees and expenses incurred by the parties.
 
<TABLE>
<S>                                                                <C>
EXPENSES TO BE PAID BY PURCHASER AND ITS AFFILIATES:
  Legal Fees.....................................................  $ 300,000
  Printing and Mailing...........................................    110,000
  Advertising....................................................     74,000
  Filing Fees....................................................     18,100
  Depositary Fees................................................    100,000
  Information Agent Fees.........................................     12,500
  Miscellaneous..................................................    150,000
                                                                   ---------
    Total........................................................  $ 764,600
                                                                   ---------
                                                                   ---------
EXPENSES TO BE PAID BY THE COMPANY:
  Legal Fees and Expenses........................................  $ 400,000
  Printing and Mailing...........................................     50,000
  Miscellaneous..................................................    100,000
                                                                   ---------
    Total........................................................  $ 550,000
                                                                   ---------
                                                                   ---------
</TABLE>
 
                                       27
<PAGE>
                                THE TENDER OFFER
 
    1. TERMS OF THE OFFER; EXPIRATION DATE.  Upon the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of such extension or amendment), Purchaser will accept for
payment, and will pay for, all Shares validly tendered prior to the Expiration
Date (as hereinafter defined) and not withdrawn as permitted by "THE TENDER
OFFER -- Section 4. Withdrawal Rights". The term "Expiration Date" means 12:00
midnight, New York City time, on Friday, February 14, 1997, unless and until
Purchaser, in its sole discretion (but subject to the terms and conditions of
the Merger Agreement), shall have extended the period during which the Offer is
open, in which event the term "Expiration Date" shall mean the latest time and
date at which the Offer, as so extended by Purchaser, shall expire.
 
    Purchaser expressly reserves the right, in its sole discretion (but subject
to the terms and conditions of the Merger Agreement), at any time and from time
to time, to extend for any reason the period of time during which the Offer is
open, including the occurrence of any of the conditions specified in "THE TENDER
OFFER -- Section 12. Certain Conditions of the Offer", by giving oral or written
notice of such extension to the Depositary. During any such extension, all
Shares previously tendered and not withdrawn will remain subject to the Offer,
subject to the rights of a tendering stockholder to withdraw such stockholder's
Shares. See "THE TENDER OFFER --Section 4. Withdrawal Rights".
 
    Subject to the applicable regulations of the Commission, Purchaser also
expressly reserves the right, in its sole discretion (but subject to the terms
and conditions of the Merger Agreement), at any time and from time to time, (i)
to delay acceptance for payment of, or, regardless of whether such Shares were
theretofore accepted for payment, payment for, any Shares, pending receipt of
any regulatory approval specified in "THE TENDER OFFER -- Section 13. Certain
Legal Matters and Regulatory Approval", (ii) to terminate the Offer and not
accept for payment any Shares upon the occurrence of any of the conditions
specified in "THE TENDER OFFER -- Section 12. Certain Conditions of the Offer"
and (iii) to waive any condition, except for the First Minimum Condition, or
otherwise amend the Offer in any respect, by giving oral or written notice of
such delay, termination, waiver or amendment to the Depositary and by making a
public announcement thereof. The Merger Agreement provides that, without the
consent of the Company, Purchaser will not (i) decrease the price per Share
payable pursuant to the Offer, (ii) reduce the maximum number of Shares to be
purchased in the Offer or (iii) impose conditions to the Offer in addition to
those set forth in "THE TENDER OFFER -- Section 12. Certain Conditions of the
Offer". In the event all conditions set forth in the Merger Agreement shall have
been satisfied other than the Second Minimum Condition, Purchaser may extend the
Offer for a period or periods aggregating not more than 20 business days after
the later of (i) the initial expiration date of the Offer and (ii) the date on
which all other conditions set forth in the Merger Agreement shall have been
satisfied, after which time Purchaser shall waive the Second Minimum Condition.
Purchaser acknowledges that (i) Rule 14e-1(c) under the Exchange Act requires
Purchaser to pay the consideration offered or return the Shares tendered
promptly after the termination or withdrawal of the Offer and (ii) Purchaser may
not delay acceptance for payment of, or payment for (except as provided in
clause (i) of the first sentence of this paragraph), any Shares upon the
occurrence of any of the conditions specified in "THE TENDER OFFER -- Section
12. Certain Conditions of the Offer" without extending the period of time during
which the Offer is open.
 
    Any such extension, delay, termination, waiver or amendment will be followed
as promptly as practicable by public announcement thereof, such announcement in
the case of an extension to be made no later than 9:00 a.m., New York City time,
on the next business day after the previously scheduled Expiration Date. Subject
to applicable law (including Rules 14d-4(c), 14d-6(d) and 14e-1 under the
Exchange Act, which require that material changes be promptly disseminated to
stockholders in a manner reasonably designed to inform them of such changes) and
without limiting the manner in which Purchaser may choose to make any public
announcement, Purchaser shall have no obligation to publish, advertise or
 
                                       28
<PAGE>
otherwise communicate any such public announcement other than by issuing a press
release to the Dow Jones News Service.
 
    If Purchaser makes a material change in the terms of the Offer or the
information concerning the Offer, or if it waives a material condition of the
Offer, Purchaser will extend the Offer to the extent required by Rules 14d-4(c),
14d-6(d) and 14e-1 under the Exchange Act.
 
    Subject to the terms of the Merger Agreement, if, prior to the Expiration
Date, Purchaser should decide to decrease the number of Shares being sought or
to increase or decrease the consideration being offered in the Offer, such
decrease in the number of Shares being sought or such increase or decrease in
the consideration being offered will be applicable to all stockholders whose
Shares are accepted for payment pursuant to the Offer and, if at the time notice
of any such decrease in the number of Shares being sought or such increase or
decrease in the consideration being offered is first published, sent or given to
holders of such Shares, the Offer is scheduled to expire at any time earlier
than the period ending on the tenth business day from and including the date
that such notice is first so published, sent or given, the Offer will be
extended at least until the expiration of such ten business day period. For
purposes of the Offer, a "business day" means any day other than a Saturday,
Sunday or federal holiday and consists of the time period from 12:01 a.m.
through 12:00 midnight, New York City time.
 
    The Company has provided Purchaser with the Company's stockholder list and
security position listings for the purpose of disseminating the Offer to holders
of Shares. This Offer to Purchase and the related Letter of Transmittal will be
mailed to record holders of Shares whose names appear on the Company's
stockholder list and will be furnished, for subsequent transmittal to beneficial
owners of Shares, to brokers, dealers, commercial banks, trust companies and
similar persons whose names, or the names of whose nominees, appear on the
stockholder list or, if applicable, who are listed as participants in a clearing
agency's security position listing.
 
    2. ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES.  Upon the terms and
subject to the conditions of the Offer (including, if the Offer is extended or
amended, the terms and conditions of any such extension or amendment), Purchaser
will accept for payment, and will pay for, all Shares validly tendered prior to
the Expiration Date and not properly withdrawn, promptly after the latest to
occur of (i) the Expiration Date and (ii) the satisfaction or waiver of the
conditions to the Offer set forth in "THE TENDER OFFER -- Section 12. Certain
Conditions of the Offer". Subject to applicable rules of the Commission and the
terms and conditions of the Merger Agreement, Purchaser expressly reserves the
right to delay acceptance for payment of, or payment for, Shares pending receipt
of any regulatory approvals specified in "THE TENDER OFFER -- Section 13.
Certain Legal Matters and Regulatory Approvals" or in order to comply in whole
or in part with any other applicable law.
 
    In all cases, payment for Shares tendered and accepted for payment pursuant
to the Offer will be made only after timely receipt by the Depositary of (i) the
certificates evidencing such Shares (the "Share Certificates") or timely
confirmation (a "Book-Entry Confirmation") of a book-entry transfer of such
Shares into the Depositary's account at The Depository Trust Company, the
Midwest Securities Trust Company or the Philadelphia Depository Trust Company
(each, a "Book-Entry Transfer Facility" and, collectively, the "Book-Entry
Transfer Facilities") pursuant to the procedures set forth in "THE TENDER OFFER
- -- Section 3. Procedures for Accepting the Offer and Tendering Shares", (ii) the
Letter of Transmittal (or a facsimile thereof), properly completed and duly
executed, with any required signature guarantees or, in the case of a book-entry
transfer, an Agent's Message (as defined below) in lieu of the Letter of
Transmittal and (iii) any other documents required under the Letter of
Transmittal.
 
    For purposes of the Offer, Purchaser will be deemed to have accepted for
payment (and thereby purchased) Shares validly tendered and not properly
withdrawn as, if and when Purchaser gives oral or written notice to the
Depositary of Purchaser's acceptance for payment of such Shares pursuant to the
Offer. Upon the terms and subject to the conditions of the Offer, payment for
Shares accepted for payment pursuant to the Offer will be made by deposit of the
purchase price therefor with the Depositary,
 
                                       29
<PAGE>
which will act as agent for tendering stockholders for the purpose of receiving
payments from Purchaser and transmitting such payments to tendering stockholders
whose Shares have been accepted for payment. Under no circumstances will
interest on the purchase price for Shares be paid, regardless of any delay in
making such payment.
 
    If any tendered Shares are not accepted for payment for any reason pursuant
to the terms and conditions of the Offer, or if Share Certificates are submitted
evidencing more Shares than are tendered, Share Certificates evidencing
unpurchased Shares will be returned, without expense to the tendering
stockholder (or, in the case of Shares tendered by book-entry transfer into the
Depositary's account at a Book-Entry Transfer Facility pursuant to the procedure
set forth in "THE TENDER OFFER -- Section 3. Procedures for Accepting the Offer
and Tendering Shares", such Shares will be credited to an account maintained at
such Book-Entry Transfer Facility), as promptly as practicable following the
expiration or termination of the Offer.
 
    If, prior to the Expiration Date, Purchaser shall increase the consideration
offered to any holders of Shares pursuant to the Offer, such increased
consideration shall be paid to all holders of Shares that are purchased pursuant
to the Offer, whether or not such Shares were tendered prior to such increase in
consideration.
 
    Purchaser reserves the right to transfer or assign, in whole or from time to
time in part, to one or more of its affiliates, the right to purchase all or any
portion of the Shares tendered pursuant to the Offer, but any such transfer or
assignment will not relieve Purchaser of its obligations under the Offer and
will in no way prejudice the rights of tendering stockholders to receive payment
for Shares validly tendered and accepted for payment pursuant to the Offer.
 
    3. PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES.  In order for a
holder of Shares validly to tender Shares pursuant to the Offer, the Letter of
Transmittal (or a facsimile thereof), properly completed and duly executed,
together with any required signature guarantees (or, in the case of a book-entry
transfer, an Agent's Message in lieu of the Letter of Transmittal) and any other
documents required by the Letter of Transmittal, must be received by the
Depositary at one of its addresses set forth on the back cover of this Offer to
Purchase and either (i) the Share Certificates evidencing tendered Shares must
be received by the Depositary at such address or such Shares must be tendered
pursuant to the procedure for book-entry transfer described below and a
Book-Entry Confirmation must be received by the Depositary (including an Agent's
Message if the tendering stockholder has not delivered a Letter of Transmittal),
in each case prior to the Expiration Date, or (ii) the tendering stockholder
must comply with the guaranteed delivery procedures described below. The term
"Agent's Message" means a message, transmitted by a Book-Entry Transfer Facility
to, and received by, the Depositary and forming a part of a Book-Entry
Confirmation, which states that such Book-Entry Transfer Facility has received
an express acknowledgement from the participant in such Book-Entry Transfer
Facility tendering the Shares which are the subject of such book-entry
confirmation, that such participant has received and agrees to be bound by the
terms of the Letter of Transmittal and that Purchaser may enforce such agreement
against such participant.
 
    THE METHOD OF DELIVERY OF SHARE CERTIFICATES AND ALL OTHER REQUIRED
DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY, IS AT
THE OPTION AND RISK OF THE TENDERING STOCKHOLDER, AND THE DELIVERY WILL BE
DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF DELIVERY IS BY
MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS
RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY
DELIVERY.
 
    BOOK-ENTRY TRANSFER.  The Depositary will establish accounts with respect to
the Shares at the Book-Entry Transfer Facilities for purposes of the Offer
within two business days after the date of this Offer to Purchase. Any financial
institution that is a participant in the system of any Book-Entry Transfer
Facility may make a book-entry delivery of Shares by causing such Book-Entry
Transfer Facility to transfer such
 
                                       30
<PAGE>
Shares into the Depositary's account at such Book-Entry Transfer Facility in
accordance with such Book-Entry Transfer Facility's procedures for such
transfer. However, although delivery of Shares may be effected through
book-entry transfer at a Book-Entry Transfer Facility, either the Letter of
Transmittal (or a facsimile thereof), properly completed and duly executed,
together with any required signature guarantees, or an Agent's Message in lieu
of the Letter of Transmittal, and any other required documents, must, in any
case, be received by the Depositary at one of its addresses set forth on the
back cover of this Offer to Purchase prior to the Expiration Date, or the
tendering stockholder must comply with the guaranteed delivery procedure
described below. DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY DOES
NOT CONSTITUTE DELIVERY TO THE DEPOSITARY.
 
    SIGNATURE GUARANTEES.  Signatures on all Letters of Transmittal must be
guaranteed by a firm which is a member of the Medallion Signature Guarantee
Program, or by any other "eligible guarantor institution", as such term is
defined in Rule 17Ad-15 under the Exchange Act (each of the foregoing referred
to as an "Eligible Institution"), except in cases where Shares are tendered (i)
by a registered holder of Shares who has not completed either the box entitled
"Special Payment Instructions" or the box entitled "Special Delivery
Instructions" on the Letter of Transmittal or (ii) for the account of an
Eligible Institution. If a Share Certificate is registered in the name of a
person other than the signer of the Letter of Transmittal, or if payment is to
be made, or a Share Certificate not accepted for payment or not tendered is to
be returned, to a person other than the registered holder(s), then the Share
Certificate must be endorsed or accompanied by appropriate stock powers, in
either case signed exactly as the name(s) of the registered holder(s) appear on
the Share Certificate, with the signature(s) on such Share Certificate or stock
powers guaranteed by an Eligible Institution. See Instructions 1 and 5 of the
Letter of Transmittal.
 
    GUARANTEED DELIVERY.  If a stockholder desires to tender Shares pursuant to
the Offer and the Share Certificates evidencing such stockholder's Shares are
not immediately available or such stockholder cannot deliver the Share
Certificates and all other required documents to the Depositary prior to the
Expiration Date, or such stockholder cannot complete the procedure for delivery
by book-entry transfer on a timely basis, such Shares may nevertheless be
tendered, provided that all the following conditions are satisfied:
 
        (i) such tender is made by or through an Eligible Institution;
 
        (ii) a properly completed and duly executed Notice of Guaranteed
    Delivery, substantially in the form made available by Purchaser, is received
    prior to the Expiration Date by the Depositary as provided below; and
 
        (iii) the Share Certificates (or a Book-Entry Confirmation) evidencing
    all tendered Shares, in proper form for transfer, in each case together with
    the Letter of Transmittal (or a facsimile thereof), properly completed and
    duly executed, with any required signature guarantees, and any other
    documents required by the Letter of Transmittal are received by the
    Depositary within three NASDAQ trading days after the date of execution of
    such Notice of Guaranteed Delivery.
 
    The Notice of Guaranteed Delivery may be delivered by hand or mail or
transmitted by telegram or facsimile transmission to the Depositary and must
include a guarantee by an Eligible Institution in the form set forth in the form
of Notice of Guaranteed Delivery made available by Purchaser.
 
    In all cases, payment for Shares tendered and accepted for payment pursuant
to the Offer will be made only after timely receipt by the Depositary of the
Share Certificates evidencing such Shares, or a Book-Entry Confirmation of the
delivery of such Shares, and the Letter of Transmittal (or a facsimile thereof),
properly completed and duly executed, with any required signature guarantees,
and any other documents required by the Letter of Transmittal.
 
    DETERMINATION OF VALIDITY.  All questions as to the validity, form,
eligibility (including time of receipt) and acceptance for payment of any tender
of Shares will be determined by Purchaser in its sole discretion, which
determination shall be final and binding on all parties. Purchaser reserves the
absolute right to reject
 
                                       31
<PAGE>
any and all tenders determined by it not to be in proper form or the acceptance
for payment of which may, in the opinion of its counsel, be unlawful. Subject to
the terms of the Merger Agreement, Purchaser also reserves the absolute right to
waive any condition of the Offer or any defect or irregularity in the tender of
any Shares of any particular stockholder, whether or not similar defects or
irregularities are waived in the case of other stockholders. No tender of Shares
will be deemed to have been validly made until all defects and irregularities
have been cured or waived. None of Purchaser, Parent, the Dealer Manager, the
Depositary, the Information Agent or any other person will be under any duty to
give notification of any defects or irregularities in tenders or incur any
liability for failure to give any such notification. Purchaser's interpretation
of the terms and conditions of the Offer (including the Letter of Transmittal
and the instructions thereto) will be final and binding.
 
    OTHER REQUIREMENTS.  By executing the Letter of Transmittal as set forth
above, a tendering stockholder irrevocably appoints designees of Purchaser as
such stockholder's proxies, each with full power of substitution, in the manner
set forth in the Letter of Transmittal, to the full extent of such stockholder's
rights with respect to the Shares tendered by such stockholder and accepted for
payment by Purchaser (and with respect to any and all other Shares or other
securities issued or issuable in respect of such Shares on or after January 10,
1997). All such proxies shall be considered coupled with an interest in the
tendered Shares. Such appointment will be effective when, and only to the extent
that, Purchaser accepts such Shares for payment. Upon such acceptance for
payment, all prior proxies given by such stockholder with respect to such Shares
(and such other Shares and securities) will be revoked without further action,
and no subsequent proxies may be given nor any subsequent written consent
executed by such stockholder (and, if given or executed, will not be deemed to
be effective) with respect thereto. The designees of Purchaser will, with
respect to the Shares for which the appointment is effective, be empowered to
exercise all voting and other rights of such stockholder as they in their sole
discretion may deem proper at any annual or special meeting of the Company's
stockholders or any adjournment or postponement thereof, by written consent in
lieu of any such meeting or otherwise. Purchaser reserves the right to require
that, in order for Shares to be deemed validly tendered, immediately upon
Purchaser's payment for such Shares, Purchaser must be able to exercise full
voting rights with respect to such Shares.
 
    The acceptance for payment by Purchaser of Shares pursuant to any of the
procedures described above will constitute a binding agreement between the
tendering stockholder and Purchaser upon the terms and subject to the conditions
of the Offer.
 
    TO PREVENT BACKUP FEDERAL INCOME TAX WITHHOLDING WITH RESPECT TO PAYMENT TO
CERTAIN STOCKHOLDERS OF THE PURCHASE PRICE OF SHARES PURCHASED PURSUANT TO THE
OFFER, EACH SUCH STOCKHOLDER MUST PROVIDE THE DEPOSITARY WITH SUCH STOCKHOLDER'S
CORRECT TAXPAYER IDENTIFICATION NUMBER AND CERTIFY THAT SUCH STOCKHOLDER IS NOT
SUBJECT TO BACKUP FEDERAL INCOME TAX WITHHOLDING BY COMPLETING THE SUBSTITUTE
FORM W-9 IN THE LETTER OF TRANSMITTAL. IF BACKUP WITHHOLDING APPLIES WITH
RESPECT TO A STOCKHOLDER, THE DEPOSITARY IS REQUIRED TO WITHHOLD 31% OF ANY
PAYMENTS MADE TO SUCH STOCKHOLDER. SEE INSTRUCTION 9 OF THE LETTER OF
TRANSMITTAL.
 
    4. WITHDRAWAL RIGHTS.  Tenders of Shares made pursuant to the Offer are
irrevocable except that such Shares may be withdrawn at any time prior to the
Expiration Date and, unless theretofore accepted for payment by Purchaser
pursuant to the Offer, may also be withdrawn at any time after March 17, 1997.
If Purchaser extends the Offer, is delayed in its acceptance for payment of
Shares or is unable to accept Shares for payment pursuant to the Offer for any
reason, then, without prejudice to Purchaser's rights under the Offer, the
Depositary may, nevertheless, on behalf of Purchaser, retain tendered Shares,
and such Shares may not be withdrawn except to the extent that tendering
stockholders are entitled to withdrawal rights as described in this Section 4.
 
    For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover page of this Offer to Purchase.
Any such notice of withdrawal must specify the name of the person who tendered
the
 
                                       32
<PAGE>
Shares to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder of such Shares, if different from that of the person who
tendered such Shares. If Share Certificates evidencing Shares to be withdrawn
have been delivered or otherwise identified to the Depositary, then, prior to
the physical release of such Share Certificates, the serial numbers shown on
such Share Certificates must be submitted to the Depositary and the signature(s)
on the notice of withdrawal must be guaranteed by an Eligible Institution,
unless such Shares have been tendered for the account of an Eligible
Institution. If Shares have been tendered pursuant to the procedure for
book-entry transfer as set forth in "THE TENDER OFFER -- Section 3. Procedures
for Accepting the Offer and Tendering Shares", any notice of withdrawal must
specify the name and number of the account at the Book-Entry Transfer Facility
to be credited with the withdrawn Shares.
 
    All questions as to the form and validity (including time of receipt) of any
notice of withdrawal will be determined by Purchaser, in its sole discretion,
whose determination will be final and binding. None of Purchaser, Parent, the
Dealer Manager, the Depositary, the Information Agent or any other person will
be under any duty to give notification of any defects or irregularities in any
notice of withdrawal or incur any liability for failure to give any such
notification.
 
    Any Shares properly withdrawn will thereafter be deemed not to have been
validly tendered for purposes of the Offer. However, withdrawn Shares may be
re-tendered at any time prior to the Expiration Date by following one of the
procedures described in "THE TENDER OFFER -- Section 3. Procedures for Accepting
the Offer and Tendering Shares".
 
    5. CERTAIN FEDERAL INCOME TAX CONSEQUENCES.  The receipt of cash for Shares
pursuant to the Offer or in the Merger will be a taxable transaction for federal
income tax purposes and may also be a taxable transaction under applicable
state, local or foreign tax laws. In general, a stockholder will recognize gain
or loss for federal income tax purposes equal to the difference between the
amount of cash received in exchange for the Shares sold and such stockholder's
adjusted tax basis in such Shares. Assuming the Shares constitute capital assets
in the hands of the stockholder, such gain or loss will be capital gain or loss
and will be long-term capital gain or loss if the holder will have held the
Shares for more than one year at the time of the sale. Gain or loss will be
calculated separately for each block of Shares tendered pursuant to the Offer.
 
    Legislative proposals have been under consideration that would reduce the
rate of federal income taxation of certain capital gains. Such legislation, if
enacted, might apply only to gain realized on sales occurring after a date
specified in the legislation. It cannot be predicted whether any such
legislation ultimately will be enacted and, if enacted, when its effective date
will be.
 
    In general, in order to prevent backup federal income tax withholding at a
rate of 31% on the cash consideration to be received in the Offer, each
stockholder who is not otherwise exempt from such requirements must provide such
holder's correct taxpayer identification number (and certain other information)
by completing the Substitute Form W-9 in the Letter of Transmittal.
 
    THE FOREGOING DISCUSSION MAY NOT BE APPLICABLE TO CERTAIN TYPES OF
STOCKHOLDERS, INCLUDING BROKER-DEALERS, STOCKHOLDERS WHO ACQUIRED SHARES
PURSUANT TO THE EXERCISE OF EMPLOYEE STOCK OPTIONS OR OTHERWISE AS COMPENSATION,
INDIVIDUALS WHO ARE NOT CITIZENS OR RESIDENTS OF THE UNITED STATES AND FOREIGN
CORPORATIONS.
 
    THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY AND IS BASED UPON PRESENT LAW. STOCKHOLDERS ARE URGED TO
CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE SPECIFIC TAX CONSEQUENCES OF THE
OFFER AND THE MERGER TO THEM, INCLUDING THE APPLICATION AND EFFECT OF THE
ALTERNATIVE MINIMUM TAX, AND STATE, LOCAL AND FOREIGN TAX LAWS.
 
                                       33
<PAGE>
    6. PRICE RANGE OF SHARES; DIVIDENDS.  The Shares are listed and principally
traded on NASDAQ under the symbol "STMX". The following table sets forth, for
the quarters indicated, the high and low bid prices per Share on NASDAQ as
reported by the Dow Jones News Service.
 
<TABLE>
<CAPTION>
                                                                                 HIGH        LOW
                                                                               ---------  ---------
<S>                                                                            <C>        <C>
1995:
  First Quarter..............................................................  $18 1/2    $12 1/4
  Second Quarter.............................................................   14 1/2    11 3/4
  Third Quarter..............................................................   14 1/4    11 3/4
  Fourth Quarter.............................................................   16 3/8    13 3/8
1996:
  First Quarter..............................................................  $16 3/4    $12 1/2
  Second Quarter.............................................................   20 1/2    10 3/4
  Third Quarter..............................................................   18        14 1/2
  Fourth Quarter.............................................................   17 1/2    12 3/4
1997:
  First Quarter (through January 10, 1997)...................................  $15 1/2    $14 3/4
</TABLE>
 
    Although there is no legal or contractual restriction on the payment of
dividends by the Company, historically the Company has never declared or paid
dividends and has no future plans to do so. The Company currently intends to
retain any future earnings for the development of its business.
 
    On May 23, 1996, the last full trading day prior to the announcement of
Parent's original offer to acquire the Company, the closing price per Share as
reported on NASDAQ was $11. On January 10, 1997, the last full trading day prior
to the public announcement of the execution of the Merger Agreement, the closing
price per Share as reported on NASDAQ was $15 5/16. On January 16, 1997, the
last full trading day prior to the commencement of the Offer, the closing price
per Share as reported on NASDAQ was $19 1/4.
 
STOCKHOLDERS ARE URGED TO OBTAIN A CURRENT MARKET QUOTATION FOR THE SHARES.
 
    7. CERTAIN INFORMATION CONCERNING THE COMPANY.  Except as otherwise set
forth herein, the information concerning the Company contained in this Offer to
Purchase, including financial information, has been furnished by the Company or
has been taken from or based upon publicly available documents and records on
file with the Commission and other public sources. Neither Purchaser nor Parent
assumes any responsibility for the accuracy or completeness of the information
concerning the Company furnished by the Company or contained in such documents
and records or for any failure by the Company to disclose events which may have
occurred or may affect the significance or accuracy of any such information but
which are unknown to Purchaser or Parent.
 
    GENERAL.  The Company is a Delaware corporation with its principal executive
offices located at 3155 Porter Drive, Palo Alto, California 94304. The Company
is a biotechnology company focused on creating new cellular and cell-based gene
therapies for major disorders of the blood and immune system based on the use of
the human hematopoietic stem cell (the "HSC"). The Company believes the special
properties of the HSC should produce long-lasting, highly efficient cell, gene
replacement and gene modification therapies for cancer, AIDS and other
infectious diseases and genetic diseases.
 
    In 1991, the Company completed an initial public offering of Common Stock
and, since that time, has made no additional underwritten public offerings of
Common Stock.
 
                                       34
<PAGE>
    FINANCIAL INFORMATION.  Set forth below is certain selected financial
information relating to the Company which has been excerpted or derived from the
audited financial statements contained in the Company's Annual Report on Form
10-K for the fiscal year ended December 31, 1995 (the "Form 10-K") and the
unaudited financial statements contained in the Company's Quarterly Report on
Form 10-Q for the period ended September 30, 1996 (the "Form 10-Q"). More
comprehensive financial information is included in the Form 10-K and Form 10-Q
and other documents filed by the Company with the Commission. The financial
information that follows is qualified in its entirety by reference to such
reports and other documents, including the financial statements and related
notes contained therein. Such reports and other documents may be examined and
copies may be obtained from the offices of the Commission in the manner set
forth below. In addition, Schedules IV and V hereto set forth the Company's
audited financial statements for the fiscal year ended December 31, 1995 and the
Company's unaudited financial statements for the period ended september 30,
1996, respectively.
 
                                 SYSTEMIX, INC.
                         SELECTED FINANCIAL INFORMATION
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
<TABLE>
<CAPTION>
                                                                       NINE MONTHS ENDED      FISCAL YEAR ENDED
                                                                         SEPTEMBER 30,           DECEMBER 31,
                                                                     ---------------------  ----------------------
<S>                                                                  <C>        <C>         <C>         <C>
                                                                       1996        1995        1995        1994
                                                                     ---------  ----------  ----------  ----------
 
<CAPTION>
                                                                          (UNAUDITED)
<S>                                                                  <C>        <C>         <C>         <C>
INCOME STATEMENT DATA:
Revenues:
  Collaborative research from related parties......................  $   2,975  $      474  $    2,168  $    3,211
  Collaborative research...........................................         32          --         152          --
  Research grants..................................................         15         117         992         234
  Contract testing.................................................         --          --         165         669
  Other............................................................         31          44         139          --
                                                                     ---------  ----------  ----------  ----------
    Total revenues.................................................      3,053         635       3,616       4,114
Expenses:
  Research and development
  Collaborative research...........................................      3,007         739       3,422       4,142
  Research grants..................................................         15         117         992         234
  Contract testing.................................................         --          --         150         422
  Gene therapy joint venture.......................................         --         862       2,940       3,997
  Company-sponsored................................................      7,462       9,280      39,229      31,740
                                                                     ---------  ----------  ----------  ----------
    Total research and development.................................     10,484      10,998      46,733      40,535
  General and administrative.......................................      2,082       1,868       8,110       8,819
                                                                     ---------  ----------  ----------  ----------
    Total operating expenses.......................................     12,566      12,866      54,843      49,354
                                                                     ---------  ----------  ----------  ----------
Loss from operations...............................................     (9,513)    (12,231)    (51,227     (45,240)
Other income (expense).............................................        666         990       3,140         852
                                                                     ---------  ----------  ----------  ----------
Net loss...........................................................  $  (8,847) $  (11,241) $  (48,087) $  (44,388)
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
Net loss per share.................................................  $    (.61) $     (.78) $    (3.43) $    (4.54)
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
Weighted average shares outstanding................................     14,493      14,434      14,028       9,773
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
</TABLE>
 
                                       35
<PAGE>
<TABLE>
<CAPTION>
                                                                         AT SEPTEMBER 30           AT DECEMBER 31,
                                                                     ------------------------  ------------------------
<S>                                                                  <C>          <C>          <C>          <C>
                                                                        1996         1995         1995         1994
                                                                     -----------  -----------  -----------  -----------
 
<CAPTION>
                                                                           (UNAUDITED)
<S>                                                                  <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
Assets
  Current assets:
  Cash and cash equivalents........................................  $     1,995  $    28,765  $     1,679  $     1,474
  Short-term investments...........................................       48,373       37,128       65,836        6,916
  Accounts receivable..............................................          259        1,332          256          243
  Prepaid expenses and other current assets........................        1,164        1,282        1,336        1,145
                                                                     -----------  -----------  -----------  -----------
    Total current assets...........................................       51,791       68,507       69,107        9,778
                                                                     -----------  -----------  -----------  -----------
Property and equipment, net........................................       44,862       52,645       50,553       51,998
Long-term investments..............................................           --        5,698           --       18,155
Investment in gene therapy joint venture...........................           --           --           --        1,753
Deposits and other assets..........................................          617          504          542          613
                                                                     -----------  -----------  -----------  -----------
    Total assets...................................................  $    97,270  $   127,354  $   120,202  $    82,297
                                                                     -----------  -----------  -----------  -----------
                                                                     -----------  -----------  -----------  -----------
Liabilities and Stockholders' Equity
  Current liabilities:
  Accounts payable and accrued liabilities.........................  $     6,744  $     3,836  $     3,873  $     3,332
  Accrued compensation.............................................           --           --        2,808        2,332
  Current portion of capital lease obligation......................        1,951        1,792        1,831        1,681
  Deferred revenue from related party..............................        8,400          643        3,097          890
  Current portion of accrued rent..................................           54           --           69           --
                                                                     -----------  -----------  -----------  -----------
    Total current liabilities......................................       17,149        6,271       11,678        8,235
Noncurrent portion of capital lease obligation.....................        4,037        5,989        5,518        7,348
Accrued rent, less current portion.................................        4,730        4,336        4,536        3,013
Commitments
Stockholders' equity:
  Preferred stock, $.01 par value; 1,000,000 shares authorized;
    none issued....................................................           --           --           --           --
  Common stock, $.01 par value; 30,0000,000 shares authorized;
    14,463,094 and 9,788,283 shares issued and outstanding at
    December 31, 1995 and 1994, respectively.......................          165          157          157          110
  Additional paid-in capital.......................................      246,827      246,256      246,536      164,430
  Deferred compensation............................................         (293)        (275)        (404)        (408)
  Unrealized gain (loss) on short-term investments.................          688          (18)         390         (309)
  Accumulated deficit..............................................     (176,033)    (135,362)    (148,209)    (100,122)
                                                                     -----------  -----------  -----------  -----------
    Total stockholders' equity.....................................       71,354      110,758       98,470       63,701
                                                                     -----------  -----------  -----------  -----------
                                                                     $    97,270  $   127,354  $   120,202  $    82,297
                                                                     -----------  -----------  -----------  -----------
                                                                     -----------  -----------  -----------  -----------
</TABLE>
 
                                       36
<PAGE>
    RATIO OF EARNINGS TO FIXED CHARGES; BOOK VALUE PER SHARE.  The ratio of
earnings to fixed charges for the two most recent fiscal years is not relevant
for the Company, given that the Company has had negative earnings in the last
two fiscal years. The book value per Share was $6.81 at December 31, 1995 and
$4.92 per Share at September 30, 1996.
 
    The Company is subject to the informational filing requirements of the
Exchange Act and, in accordance therewith, is required to file periodic reports,
proxy statements and other information with the Commission relating to its
business, financial condition and other matters. Information as of particular
dates concerning the Company's directors and officers, their remuneration, stock
options granted to them, the principal holders of the Company's securities and
any material interest of such persons in transactions with the Company is
required to be disclosed in proxy statements distributed to the Company's
stockholders and filed with the Commission. Such reports, proxy statements and
other information should be available for inspection at the public reference
facilities maintained by the Commission at Room 1024, 450 Fifth Street, N.W.,
Washington, D.C. 20549, and also should be available for inspection at the
Commission's regional offices located at Seven World Trade Center, 13th Floor,
New York, New York 10048 and the Citicorp Center, 500 West Madison Street, Suite
1400, Chicago, Illinois 60661. Copies of such materials may also be obtained by
mail, upon payment of the Commission's customary fees, by writing to its
principal office at 450 Fifth Street, N.W., Washington, D.C. 20549. The
information should also be available for inspection at the National Association
of Securities Dealers, Inc., 1735 K Street N.W., Washington, D.C. 20006.
 
    8. CERTAIN INFORMATION CONCERNING PURCHASER AND PARENT.  Purchaser is a
Delaware corporation and has not carried on any activities other than in
connection with the purchase of securities of the Company pursuant to the
Acquisition Agreement and the Stock and Warrant Purchase Agreement, the holding
of such securities and activities in connection with the Offer and the Merger.
The principal offices of Purchaser are located at 608 Fifth Avenue, New York,
New York 10020. Purchaser is an indirect, wholly owned subsidiary of Parent.
 
    Parent is a corporation organized under the laws of Switzerland. Its
principal offices are located at Schwarzwaldallee 215, CH-4002 Basle,
Switzerland. The principal business of Parent and its subsidiaries is Life
Sciences, which includes pharmaceuticals, consumer health and vision care
products, agribusiness (including crop protection, animal health and seeds) and
nutrition products.
 
    The name, citizenship, business address, principal occupation or employment
and five-year employment history for each of the directors and executive
officers of Purchaser and Parent and certain other information are set forth in
Schedule I hereto.
 
    Purchaser owns 10,610,099 Shares, representing approximately 73.2% of the
14,500,094 Shares outstanding at January 10, 1997, (i) 5,993,827 of which it
acquired pursuant to the Acquisition Agreement for an average price of $65.37
per Share and (ii) 4,616,272 of which it acquired pursuant to the Stock and
Warrant Purchase Agreement. Purchaser also has Warrants to acquire 1,367,600
Shares which it acquired pursuant to the Stock and Warrant Purchase Agreement.
The aggregate purchase price for the Shares and Warrants acquired pursuant to
the Stock and Warrant Purchase Agreement was $80 million.
 
    Except as described in this Offer to Purchase, (i) none of Purchaser, Parent
nor, to the best knowledge of Purchaser and Parent, any of the persons listed in
Schedule I to this Offer to Purchase or any associate or majority-owned
subsidiary of Purchaser, Parent or any of the persons so listed beneficially
owns or has any right to acquire, directly or indirectly, any Shares and (ii)
none of Purchaser, Parent nor, to the best knowledge of Purchaser and Parent,
any of the persons or entities referred to above nor any director, executive
officer or subsidiary of any of the foregoing has effected any transaction in
the Shares during the past 60 days.
 
    Except as provided in the Merger Agreement and as otherwise described in
this Offer to Purchase, none of Purchaser, Parent nor, to the best knowledge of
Purchaser and Parent, any of the persons listed in Schedule I to this Offer to
Purchase, has any contract, arrangement, understanding or relationship with any
other person with respect to any securities of the Company, including, but not
limited to, any contract,
 
                                       37
<PAGE>
arrangement, understanding or relationship concerning the transfer or voting of
such securities, finder's fees, joint ventures, loan or option arrangements,
puts or calls, guarantees of loans, guaranties against loss, guaranties of
profits, division of profits or loss or the giving or withholding of proxies.
Except as set forth in this Offer to Purchase, since January 1, 1995, neither
Purchaser nor Parent nor, to the best knowledge of Purchaser and Parent, any of
the persons listed on Schedule I hereto, has had any business relationship or
transaction with the Company or any of its executive officers, directors or
affiliates that is required to be reported under the rules and regulations of
the Commission applicable to the Offer. Except as set forth in this Offer to
Purchase, since January 1, 1995, there have been no contacts, negotiations or
transactions between any of Purchaser, Parent, or any of their subsidiaries or,
to the best knowledge of Purchaser and Parent, any of the persons listed in
Schedule I to this Offer to Purchase, on the one hand, and the Company or its
affiliates, on the other hand, concerning a merger, consolidation or
acquisition, tender offer or other acquisition of securities, an election of
directors or a sale or other transfer of a material amount of assets.
 
    9. FINANCING OF THE OFFER AND THE MERGER.  The total amount of funds
required by Purchaser to consummate the Offer and the Merger and to pay related
fees and expenses is estimated to be approximately $83.8 million. Parent will
ensure that Purchaser has sufficient funds to acquire all the outstanding Shares
pursuant to the Offer and the Merger. Parent will provide such funds from its
working capital or its affiliates' working capital or from existing credit
facilities or new credit facilities established for this purpose or from a
combination of the foregoing. No decision has been made concerning which of the
foregoing sources Parent will utilize. Such decision will be made based on
Parent's review from time to time of the advisability of particular actions, as
well as on prevailing interest rates and financial and other economic conditions
and such other factors as Parent may deem appropriate.
 
    Parent anticipates that any indebtedness incurred through borrowings under
credit facilities will be repaid from a variety of sources, which may include,
but may not be limited to, funds generated internally by Parent and its
affiliates (including, following the Merger, funds generated by the Surviving
Corporation), bank refinancing, and the public or private sale of debt or equity
securities. No decision has been made concerning the method Parent will employ
to repay such indebtedness. Such decision will be made based on Parent's review
from time to time of the advisability of particular actions, as well as on
prevailing interest rates and financial and other economic conditions and such
other factors as Parent may deem appropriate.
 
    10. DIVIDENDS AND DISTRIBUTIONS.  If, on or after January 10, 1997, the
Company should declare or pay any dividend on the Shares or make any other
distribution (including the issuance of additional shares of capital stock
pursuant to a stock dividend or stock split, the issuance of other securities or
the issuance of rights for the purchase of any securities) with respect to the
Shares that is payable or distributable to stockholders of record on a date
prior to the transfer to the name of Purchaser or its nominee or transferee on
the Company's stock transfer records of the Shares purchased pursuant to the
Offer, then, without prejudice to Purchaser's rights under "THE TENDER OFFER --
Section 12. Certain Conditions of the Offer", (i) the purchase price per Share
payable by Purchaser pursuant to the Offer will be reduced (subject to the
Merger Agreement) to the extent any such dividend or distribution is payable in
cash and (ii) any non-cash dividend, distribution or right shall be received and
held by the tendering stockholder for the account of Purchaser and will be
required to be promptly remitted and transferred by each tendering stockholder
to the Depositary for the account of Purchaser, accompanied by appropriate
documentation of transfer. Pending such remittance and subject to applicable
law, Purchaser will be entitled to all the rights and privileges as owner of any
such non-cash dividend, distribution or right and may withhold the entire
purchase price or deduct from the purchase price the amount or value thereof, as
determined by Purchaser in its sole discretion.
 
    11. EFFECT OF THE OFFER ON THE MARKET FOR THE SHARES; NASDAQ QUOTATION AND
EXCHANGE ACT REGISTRATION.  The purchase of Shares by Purchaser pursuant to the
Offer will reduce the number of Shares that
 
                                       38
<PAGE>
might otherwise trade publicly and will reduce the number of holders of Shares,
which could adversely affect the liquidity and market value of the remaining
Shares held by the public.
 
    Parent intends to cause the Shares not to be listed for quotation by NASDAQ
following consummation of the Offer.
 
    Depending upon the number of Shares purchased pursuant to the Offer, the
Shares may no longer meet the standards for continued inclusion in NASDAQ.
According to NASDAQ's published guidelines, the Shares would not be eligible to
be included for listing if, among other things, the number of Shares publicly
held falls below 200,000, the number of holders of Shares falls below 400 or the
aggregate market value of such publicly held Shares does not exceed $1,000,000.
If these standards are not met, quotations might continue to be published in The
NASDAQ SmallCap Market, Inc., but if the number of holders of the Shares falls
below 300, or if the number of publicly held Shares falls below 100,000, or if
the aggregate market value of such publicly held Shares does not exceed $200,000
or there are not at least two registered and active market makers, one of which
may be a market maker entering a stabilizing bid, NASDAQ rules provide that the
securities would no longer qualify for inclusion in NASDAQ and NASDAQ would
cease to provide any quotations. Shares held directly or indirectly by an
officer or director of the Company or by a beneficial owner of more than 10% of
the Shares will ordinarily not be considered as being publicly held for this
purpose. In the event the Shares were no longer eligible for NASDAQ quotation,
quotations might still be available from other sources. The extent of the public
market for the Shares and the availability of such quotations would, however,
depend upon the number of holders of such Shares remaining at such time, the
interest in maintaining a market in such Shares on the part of securities firms,
the possible termination of registration of such Shares under the Exchange Act
as described below and other factors.
 
    The Shares are currently "margin securities", as such term is defined under
the rules of the Board of Governors of the Federal Reserve System (the "Federal
Reserve Board"), which has the effect, among other things, of allowing brokers
to extend credit on the collateral of such securities. Depending upon factors
similar to those described above regarding listing and market quotations,
following the Offer it is possible that the Shares might no longer constitute
"margin securities" for purposes of the margin regulations of the Federal
Reserve Board, in which event such Shares could no longer be used as collateral
for loans made by brokers.
 
    The Shares are currently registered under the Exchange Act. Such
registration may be terminated upon application by the Company to the Commission
if the Shares are not listed on a national securities exchange and there are
fewer than 300 record holders. The termination of the registration of the Shares
under the Exchange Act would substantially reduce the information required to be
furnished by the Company to holders of Shares and to the Commission and would
make certain provisions of the Exchange Act, such as the short-swing profit
recovery provisions of Section 16(b), the requirement of furnishing a proxy
statement in connection with shareholders' meetings and the requirements of Rule
13e-3 under the Exchange Act with respect to "going private" transactions, no
longer applicable to the Shares. In addition, "affiliates" of the Company and
persons holding "restricted securities" of the Company may be deprived of the
ability to dispose of such securities pursuant to Rule 144 promulgated under the
Securities Act of 1933, as amended. If registration of the Shares under the
Exchange Act were terminated, the Shares would no longer be "margin securities"
or be eligible for NASDAQ reporting. Purchaser currently intends to seek to
cause the Company to terminate the registration of the Shares under the Exchange
Act as soon after consummation of the Offer as the requirements for termination
of registration are met.
 
    12. CERTAIN CONDITIONS OF THE OFFER.  Purchaser shall not, without the
consent of a majority of the Independent Directors, accept for payment any
Shares tendered pursuant to the Offer unless at least a majority of the then
issued and outstanding Shares, other than Shares owned by Parent and Purchaser,
shall have been validly tendered and not withdrawn prior to the expiration of
the Offer. Notwithstanding any other provision of the Offer, Purchaser shall not
be required to accept for payment or pay for any Shares tendered pursuant to the
Offer, and may terminate or amend the Offer and may postpone the acceptance for
payment of, and payment for, Shares tendered, if (i) immediately prior to the
expiration of
 
                                       39
<PAGE>
the Offer the Second Minimum Condition shall not have been satisfied or (ii) at
any time on or after the date of the Merger Agreement, and prior to the
acceptance for payment of Shares, any of the following conditions shall exist:
 
        (a) an order shall have been entered in any action or proceeding before
    any federal or state court or governmental agency or other regulatory body
    or a permanent injunction by any federal or state court of competent
    jurisdiction in the United States shall have been issued and remain in
    effect (i) making illegal the purchase of, or payment for, any Shares by
    Parent, Purchaser or any affiliate of Parent or Purchaser; (ii) otherwise
    preventing the consummation of any of the transactions contemplated by the
    Merger Agreement; (iii) imposing limitations on the ability of Parent,
    Purchaser or any affiliate of Parent or Purchaser to exercise effectively
    full rights of ownership of any Shares, including, without limitation, the
    right to vote any Shares acquired by Purchaser pursuant to the Offer on all
    matters properly presented to the Company's stockholders, which would effect
    a material diminution in the value of the Shares acquired by Purchaser;
 
        (b) there shall have been any federal or state statute, rule or
    regulation enacted or promulgated on or after the date of the Offer that
    could reasonably be expected to result, directly or indirectly, in any of
    the consequences referred to in clauses (i) through (iii) of paragraph (a)
    above;
 
        (c) any representation or warranty of the Company in the Merger
    Agreement which is qualified as to materiality shall not be true and correct
    or any such representation or warranty that is not so qualified shall not be
    true and correct in any material respect, in each case as if such
    representation or warranty was made as of such time on or after the date of
    this Agreement;
 
        (d) there shall have occurred and be remaining in effect (i) any general
    suspension of, or limitation on prices for, trading in securities of the
    Company on NASDAQ, (ii) any material change in United States or Switzerland
    currency exchange rates or a suspension of, or limitation on, currency
    exchange markets in the United States or Switzerland, (iii) a declaration of
    a banking moratorium or any suspension of payments in respect of banks in
    the United States or Switzerland, (iv) a commencement of a war or armed
    hostilities or other national or international calamity directly or
    indirectly involving the United States or Switzerland or (v) in the case of
    any of the foregoing existing on the date hereof, a material acceleration or
    worsening thereof;
 
        (e) the Merger Agreement shall have been terminated in accordance with
    its terms; or
 
        (f) Purchaser and the Company (with the approval of a majority of the
    Independent Directors) shall have agreed that Purchaser shall terminate the
    Offer or postpone the acceptance for payment of or payment for Shares
    thereunder;
 
which, in the reasonable judgment of Purchaser in any such case, and regardless
of the circumstances (including any action or inaction by Parent or any of its
affiliates) giving rise to any such condition, makes it inadvisable to proceed
with such acceptance for payment or payment.
 
    The foregoing conditions are for the sole benefit of Purchaser and Parent
and may be asserted by Purchaser or Parent regardless of the circumstances
giving rise to any such condition or may be waived by Purchaser or Parent in
whole or in part at any time and from time to time in their sole discretion;
PROVIDED, HOWEVER, that Purchaser and Parent may not waive the First Minimum
Condition without the consent of a majority of the Independent Directors.
Purchaser has agreed to waive the Second Minimum Condition under certain
circumstances described herein. See "SPECIAL FACTORS -- The Merger Agreement".
The failure by Parent or Purchaser at any time to exercise any of the foregoing
rights shall not be deemed a waiver of any such right; the waiver of any such
right with respect to particular facts and other circumstances shall not be
deemed a waiver with respect to any other facts and circumstances; and each such
right shall be deemed an ongoing right that may be asserted at any time and from
time to time.
 
                                       40
<PAGE>
    13. CERTAIN LEGAL MATTERS AND REGULATORY APPROVALS.
 
    GENERAL.  Based upon its examination of publicly available information with
respect to the Company and the review of certain information furnished by the
Company to Parent and discussions of representatives of Parent with
representatives of the Company during Parent's investigation of the Company (see
"SPECIAL FACTORS -- Background of the Offer and the Merger"), neither Purchaser
nor Parent is aware of any license or other regulatory permit that appears to be
material to the business of the Company, which might be adversely affected by
the acquisition of Shares by Purchaser pursuant to the Offer or, except as set
forth below, of any approval or other action by any domestic (federal or state)
or foreign governmental, administrative or regulatory authority or agency which
would be required prior to the acquisition of Shares by Purchaser pursuant to
the Offer. Should any such approval or other action be required, it is
Purchaser's present intention to seek such approval or action. Purchaser does
not currently intend, however, to delay the purchase of Shares tendered pursuant
to the Offer pending the outcome of any such action or the receipt of any such
approval (subject to Purchaser's right to decline to purchase Shares if any of
the conditions in Section 12 shall have occurred). There can be no assurance
that any such approval or other action, if needed, would be obtained without
substantial conditions or that adverse consequences might not result to the
business of the Company, Purchaser or Parent or that certain parts of the
businesses of the Company, Purchaser or Parent might not have to be disposed of
or held separate or other substantial conditions complied with in order to
obtain such approval or other action or in the event that such approval was not
obtained or such other action was not taken. Purchaser's obligation under the
Offer to accept for payment and pay for Shares is subject to certain conditions,
including conditions relating to the legal matters discussed in this Section 13.
See "THE TENDER OFFER -- Section 12. Certain Conditions of the Offer".
 
    STATE TAKEOVER LAWS.  The Company is incorporated under the laws of the
State of Delaware. In general, Section 203 of Delaware Law prevents an
"interested stockholder" (generally a person who owns or has the right to
acquire 15% or more of a corporation's outstanding voting stock, or an affiliate
or associate thereof) from engaging in a "business combination" (defined to
include mergers and certain other transactions) with a Delaware corporation for
a period of three years following the date such person became an interested
stockholder unless, among other things, prior to such date the board of
directors of the corporation approved either the business combination or the
transaction in which the interested stockholder became an interested
stockholder. Parent became an interested stockholder in 1992 and thus the
three-year limitation on a business combination between the Company and Parent
is no longer in effect. Accordingly, Section 203 is inapplicable to the Offer
and the Merger.
 
    A number of other states have adopted laws and regulations applicable to
attempts to acquire securities of corporations which are incorporated, or have
substantial assets, stockholders, principal executive offices or principal
places of business, or whose business operations otherwise have substantial
economic effects, in such states. In EDGAR V. MITE CORP., the Supreme Court of
the United States invalidated on constitutional grounds the Illinois Business
Takeover Statute, which, as a matter of state securities law, made takeovers of
corporations meeting certain requirements more difficult. However, in 1987 in
CTS CORP. V. DYNAMICS CORP. OF AMERICA, the Supreme Court held that the State of
Indiana may, as a matter of corporate law and, in particular, with respect to
those aspects of corporate law concerning corporate governance, constitutionally
disqualify a potential acquiror from voting on the affairs of a target
corporation without the prior approval of the remaining stockholders. The state
law before the Supreme Court was by its terms applicable only to corporations
that had a substantial number of stockholders in the state and were incorporated
there.
 
    The Company conducts business in a number of states throughout the United
States, some of which have enacted takeover laws. Purchaser does not know
whether any of these laws will, by their terms, apply to the Offer or the Merger
and has not complied with any such laws. Should any person seek to apply any
state takeover law, Purchaser will take such action as then appears desirable,
which may include challenging the validity or applicability of any such statute
in appropriate court proceedings. In the event it is asserted that one or more
state takeover laws are applicable to the Offer or the Merger, and an
 
                                       41
<PAGE>
appropriate court does not determine that it is inapplicable or invalid as
applied to the Offer, Purchaser might be required to file certain information
with, or receive approvals from, the relevant state authorities. In addition, if
enjoined, Purchaser might be unable to accept for payment any Shares tendered
pursuant to the Offer, or be delayed in continuing or consummating the Offer and
the Merger. In such case, Purchaser may not be obligated to accept for payment
any Shares tendered. See "THE TENDER OFFER --Section 12. Certain Conditions of
the Offer".
 
    ANTITRUST.  Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976,
and the rules that have been promulgated thereunder by the Federal Trade
Commission (the "FTC"), certain transactions may not be consummated unless
certain information has been furnished to the Antitrust Division of the
Department of Justice and the FTC and certain waiting period requirements have
been satisfied. The acquisition of Shares by Purchaser pursuant to the Offer,
however, is not subject to such requirements because Purchaser currently owns in
excess of 50% of the outstanding Shares. See "THE TENDER OFFER -- Section 2.
Acceptance for Payment and Payment for Shares".
 
    The FTC and the Antitrust Division frequently scrutinize the legality under
the antitrust laws of transactions such as the proposed acquisition of Shares by
Purchaser pursuant to the Offer. At any time before or after the purchase of
Shares pursuant to the Offer by Purchaser, the FTC or the Antitrust Division
could take such action under the antitrust laws as it deems necessary or
desirable in the public interest, including seeking to enjoin the purchase of
Shares pursuant to the Offer or seeking the divestiture of Shares purchased by
Purchaser or the divestiture of substantial assets of Parent, the Company or
their respective subsidiaries. Private parties and state attorneys general may
also bring legal action under federal or state antitrust laws under certain
circumstances. Based upon an examination of information available to Parent
relating to the businesses in which Parent, the Company and their respective
subsidiaries are engaged, Parent and Purchaser believe that the Offer will not
violate the antitrust laws. Nevertheless, there can be no assurance that a
challenge to the Offer on antitrust grounds will not be made or, if such a
challenge is made, what the result would be. See "THE TENDER OFFER -- Section
12. Certain Conditions of the Offer".
 
    LITIGATION.  Shortly after the May 24, 1996 announcement by Parent that it
proposed to acquire those Shares of the Company that it did not already own, six
cases were filed in the Delaware Court of Chancery challenging the fairness of
the proposed transaction to the minority stockholders: WERBOWSKY V. SANDOZ LTD.
ET AL. (filed May 24, 1996), VOSLER V. SYSTEMIX, INC. ET AL. (filed May 24,
1996), CINCOTTA V. SANDOZ LTD. ET AL. (filed May 28, 1996), CRANDON CAPITAL
PARTNERS V. RUVANE ET AL. (filed May 28, 1996), ROSENBERG V. RUVANE ET AL.
(filed May 28, 1996) and TRACY V. BARLOCHER ET AL. (filed May 30, 1996). These
cases, all filed as putative class actions, were subsequently consolidated as IN
RE SYSTEMIX, INC. SHAREHOLDERS LITIGATION. In substance, the complaints alleged
that the acquisition price initially proposed by Parent was not the result of
arms' length negotiations and that, in proposing an allegedly inadequate price,
Parent was not treating the minority stockholders fairly. The plaintiffs also
claimed that the defendants -- Parent, the Company, certain subsidiaries of
Parent and several individuals serving as directors of one or more of those
companies--breached their fiduciary duties to the public stockholders of the
Company by failing to insist on a fair and adequate price. The relief sought by
the plaintiffs includes an injunction against consummation of the transaction;
in the alternative, an order requiring the defendants to evaluate alternatives
to the proposed transaction; rescission of the transaction if consummated; an
accounting; and damages in an unspecified amount.
 
    14. FEES AND EXPENSES.  Except as set forth below, Purchaser will not pay
any fees or commissions to any broker, dealer or other person for soliciting
tenders of Shares pursuant to the Offer.
 
    Morgan Stanley is acting as Dealer Manager in connection with the Offer and
has provided certain financial advisory services in connection with the
acquisition of the Company. In accordance with the letter agreement dated
December 5, 1991 between Sandoz Pharma Ltd. and Morgan Stanley relating to
Purchaser's initial investment in the Company, Morgan Stanley is not receiving
any additional compensation from Purchaser or Parent for its advisory services
or its role as Dealer Manager in connection with the
 
                                       42
<PAGE>
Offer. Parent has agreed to reimburse Morgan Stanley for all reasonable
out-of-pocket expenses incurred by Morgan Stanley, including the reasonable fees
and expenses of legal counsel, and to indemnify Morgan Stanley against certain
liabilities and expenses in connection with its engagement, including certain
liabilities under the federal securities laws.
 
    Purchaser and Parent have retained Georgeson & Company Inc., as the
Information Agent, and ChaseMellon Shareholder Services, L.L.C., as the
Depositary, in connection with the Offer. The Information Agent may contact
holders of Shares by mail, telephone, telecopy, telegraph and personal interview
and may request banks, brokers, dealers and other nominee stockholders to
forward materials relating to the Offer to beneficial owners.
 
    As compensation for acting as Information Agent in connection with the
Offer, Georgeson & Company Inc. will be paid a fee of $12,500 and will also be
reimbursed for certain out-of-pocket expenses and may be indemnified against
certain liabilities and expenses in connection with the Offer, including certain
liabilities under the federal securities laws. Purchaser will pay the Depositary
reasonable and customary compensation for its services in connection with the
Offer, plus reimbursement for out-of-pocket expenses, and will indemnify the
Depositary against certain liabilities and expenses in connection therewith,
including certain liabilities under federal securities laws. Brokers, dealers,
commercial banks and trust companies will be reimbursed by Purchaser for
customary handling and mailing expenses incurred by them in forwarding material
to their customers.
 
    15. MISCELLANEOUS.  Purchaser is not aware of any jurisdiction in which the
making of the Offer is prohibited by any administrative or judicial action
pursuant to any valid state statute. If Purchaser becomes aware of any valid
state statute prohibiting the making of the Offer or the acceptance of Shares
pursuant thereto, Purchaser will make a good faith effort to comply with any
such state statute. If, after such good faith effort, Purchaser cannot comply
with any such state statute, the Offer will not be made to (nor will tenders be
accepted from or on behalf of) the holders of Shares in such state. In any
jurisdiction where the securities, blue sky or other laws require the Offer to
be made by a licensed broker or dealer, the Offer shall be deemed to be made on
behalf of Purchaser by the Dealer Manager or by one or more registered brokers
or dealers licensed under the laws of such jurisdiction.
 
    NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATION ON BEHALF OF PURCHASER, PARENT OR THE COMPANY NOT CONTAINED IN
THIS OFFER TO PURCHASE OR IN THE LETTER OF TRANSMITTAL, AND IF GIVEN OR MADE,
SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED.
 
    Pursuant to Rule 14d-3 of the General Rules and Regulations under the
Exchange Act, Parent and Purchaser have filed with the Commission the Schedule
14D-1 together with exhibits, furnishing additional information with respect to
the Offer. Pursuant to Rule 14d-9 promulgated under the Exchange Act, the
Company has filed with the Commission the Schedule 14D-9 with respect to the
Offer, and may file amendments thereto. Parent, Purchaser and the Company have
filed a statement on Schedule 13E-3 with respect to the Offer and may file
amendments to the Schedule 13E-3. Such statements, including exhibits and any
amendments thereto, which furnish certain additional information with respect to
the Offer, may be inspected at, and copies may be obtained from, the same places
and in the same manner as set forth in "THE TENDER OFFER -- Section 7. Certain
Information Concerning the Company" (except that they will not be available at
the regional offices of the Commission).
 
                                                  NOVARTIS BIOTECH HOLDING CORP.
 
January 17, 1997
 
                                       43
<PAGE>
                                   SCHEDULE I
                      DIRECTORS AND EXECUTIVE OFFICERS OF
                              PARENT AND PURCHASER
 
    1.  DIRECTORS AND EXECUTIVE OFFICERS OF PARENT.  The following table sets
forth the name, current business address, citizenship and present principal
occupation or employment, and material occupations, positions, offices or
employments and business addresses thereof for the past five years of each
director and executive officer of Parent. Unless otherwise indicated, the
current business address of each person is Novartis Inc., Schwarzwaldallee 215,
CH-4002, Basle, Switzerland. Unless otherwise indicated, each such person is a
citizen of Switzerland.
 
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
 
Dr. Alex Krauer                          Chairman of the Board of Directors, Member of the Committee of the
                                         Board, Novartis Inc.; Chairman of the Board of Directors, Member of the
                                         Committee of the Board, and Chief Executive Officer, Ciba-Geigy Limited,
                                         Klybeckstrasse 141, CH-4002, Basle, Switzerland, from 1987 until
                                         December 1996; Director, Baloise Holding, Aeschengraben 21, CH-4051,
                                         Basle, Switzerland, since 1980; Director, Swiss Bank Corporation,
                                         Aeschenplatz 6, CH-4052 Basle, Switzerland, since 1988; Director, Chiron
                                         Corporation, 4560 Horton Street, Emeryville, California 94608, USA,
                                         since 1995.
 
Dr. Daniel Vasella                       President, Member of the Committee of the Board, Chairman of the
  Novartis Inc.                          Executive Committee, Novartis Inc.; Head of Pharmaceuticals Division,
  Lichtstrasse 35                        Sandoz Ltd., from May 1995 until December 1996; held various positions
  CH-4002 Basle                          within the Sandoz Group during previous five years, Lichtstrasse 35,
  Switzerland                            CH-4002, Basle, Switzerland.
 
Hans-Jorg Rudloff*                       Vice-Chairman, Member of the Committee of the Board, Novartis Inc.;
  Commercial Union Tower                 Vice-Chairman, Director, Sandoz Ltd., from 1994 through December 1996;
  One Undershaft                         Chairman, MC Securities Ltd., London, England, since 1994; Chairman,
  London EC3A 8LH                        MC-BBL Eastern European (Holdings) SA, Luxembourg, since 1994; Director
  England                                or Chairman, other MC Group companies; Chairman and Chief Executive
                                         Officer, Credit Suisse First Boston, London, England, from 1989 to 1993;
  c/o MC Securities Geneve SA            Member of Executive Board, Credit Suisse Holding, Zurich, Switzerland,
  84, Rue du Rhone                       from 1993 to 1994; Director or Member of the Executive Board, other
  CH-1200 Geneva                         Credit Suisse Companies; Vice Chairman, Clariden Bank, Zurich,
  Switzerland                            Switzerland, 1987 through 1995; Director, Pargesa Holding SA, Geneva,
                                         Switzerland, since 1994; Chairman, Cofinec SA, Paris, France, from 1995
                                         through 1996; Director, Orior, Switzerland, since 1994; Director, HEA
                                         Parametre Finance SA, Geneva, Switzerland, since 1996; Chairman of the
                                         Supervisory Board, Patria Finance, Czech Republic, since 1995; Director,
                                         Bank am Bellevue, Zurich, Switzerland, from 1994 through 1995; Director,
                                         TBG Holdings NV, Monaco, since 1995.
</TABLE>
 
                                      I-1
<PAGE>
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
Prof. Dr. Helmut Sihler**                Vice Chairman, Member of the Committee of the Board, Novartis Inc.;
  c/o Henkel KGaA                        Retired President and CEO, Henkel KGaA, Germany, from June 1980 through
  Henkelstrasse                          June 1992; Member of the Shareholders' Committee, Henkel KGaA, Germany,
  D-40191 Dusseldorf                     since June 1992; Vice-Chairman, Ciba-Geigy Limited, from May 1993 until
  Germany                                December 1996; Director, Ciba-Geigy Limited, May 1983 through December
                                         1996; Member of the Supervisory Board, Adam Opel AG, Russelsheim, Ger-
                                         many, June 1985 through April 1993; Member of the Supervisory Board,
                                         Allianz Lebensversicherungs AG, Stuttgart, Germany, from June 1988
                                         through June 1993; Chairman of the Supervisory Board, Degussa AG,
                                         Frankfurt, Germany, since April 1991; Chairman of the Supervisory Board,
                                         Deutsch Post AG, Frankfurt, Germany, from February 1995 through July
                                         1996; Chairman of the Supervisory Board, Deutsch Telekom AG, Bonn,
                                         Germany, since July 1996; Member of the Shareholder's Committee,
                                         Freudenberg & Co., Weinheim, Germany, from June 1991 through June 1995;
                                         Director, Guinness Plc, London, England, since May 1992; Chairman of the
                                         Supervisory Board, Infratest-Burke AG, Munchen, Germany, from October
                                         1992 through April 1996; Director, IBM, Armonk, N.Y., USA, from July
                                         1989 through July 1993; Member of the Supervisory Board, Leipziger Messe
                                         GmbH, Leipzig, Germany, since March 1992; Chairman of the Supervisory
                                         Board, Dr. Ing. h. c. F. Porsche AG, Stuttgart, Germany, since March
                                         1993.
 
Prof. Dr. Duillo Arigoni                 Director, Novartis Inc.; Director, Sandoz Ltd. more than five years
  Organic Chemistry Laboratory           until December 1996; Chemistry Professor Emeritus, ETH-Zurich for more
  Federal Institute of Technology        than five years; Member of the Board of Governors, Weizman Institute,
  (ETH-Z)                                Rehovot, Israel.
  Universitatstrasse 16
  CH-8092 Zurich
  Switzerland
 
Birgit Breuel*                           Director, Novartis Inc.; Director, Ciba-Geigy Limited, from October 1994
  Wallstrasse 15/15A                     through December 1996; Minister of Finance, Government of Niedersachsen,
  D-10179 Berlin                         from 1986 through 1990; President, Treuhandanstalt, Berlin, from 1990
  Germany                                until December 1994; Commissioner General, World Exposition EXPO 2000,
                                         Government of Germany, since 1995.
 
Prof. Dr. Peter Burckhardt               Director, Novartis Inc.; Chief and Professor of Medicine, University
  Centre Hospitalier Universitiare       Hospital, Lausanne, Switzerland, since 1972.
    CHUV
  CH-1011 Lausanne
  Switzerland
</TABLE>
 
                                      I-2
<PAGE>
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
Dr. Kaspar V. Cassani                    Director, Novartis Inc.; Retired Vice Chairman, IBM Corporation, since
  Haldenstrasse 53                       1994; Director, Ciba-Geigy Limited, from 1987 through December 1996;
  CH-8142 Uitikon                        Director, Zurich Insurance Company, Zurich, Switzerland, since 1987;
  Switzerland                            Director, Zurich Life (Vita), Zurich, Switzerland, since 1987; Director,
                                         CS Holding, Zurich, Switzerland, from 1988 through May 1996; Director,
                                         SKA Credit Suisse, Zurich, Switzerland, 1988 through May 1996; Director,
                                         Royal Dutch Petroleum Ltd., The Hague, Netherlands, since 1989;
                                         Director, IBM Germany GmbH, Stuttgart, Germany, since 1976.
 
Dr. Hans-Ulrich Doerig                   Director, Novartis Inc.; Chief Executive Officer, Credit Suisse First
  c/o Credit Suisse First Boston         Boston; Member of the Executive Board, Credit Suisse Group Zurich,
  Uetlibergstrasse 231                   Switzerland; Member of various Boards of Directors of Credit Suisse
  CH-8070 Zurich                         Group affiliates; Director, Clariant AG, Muttenz, Switzerland, July 1995
  Switzerland                            through June 1996; Director, Coca-Cola AG, Zurich, Switzerland, since
                                         June 1983; Director, Coca-Cola Trading AG, Zurich, Switzerland, since
                                         February 1988; Director, Elektrizitats-Gesellschaft Laufenburg AG,
                                         Laufenburg, Switzerland, since January 1993; Director, Elektrowatt Ltd.,
                                         Zurich, Switzerland, since October 1987; Director, Alusuisse-Lonza
                                         Holding Ltd., Zurich, Switzerland, since April 1988; Director, EXOR
                                         Group S.A., Luxembourg, since June 1984; Director, Hesta AG, Zug,
                                         Switzerland, since November 1993; Director, Hesta Tex AG, Zug,
                                         Switzerland, since June 1995; Director, HIAG Holding AG, Baar,
                                         Switzerland, since April 1991; Director, Konsum Verein Zurich, Zurich,
                                         Switzerland, since June 1994; Director Kraftubertragungswerke
                                         Rheinfelden AG, Rheinfelden, Germany, since January 1991; Director,
                                         Kraftwerk Laufenburg, Laufenburg, Switzerland, since June 1990;
                                         Director, Orell Fussli Werbe AG, Zurich, Switzerland, April 1990 through
                                         April 1993; Director, Rank Xerox AG, Zurich, Switzerland, since May
                                         1983; Director Societe Luxembourgeoise de Centrales Nucleaires, S. A.,
                                         Luxembourg, since May 1983; Director, Swiss American Corporation, New
                                         York, New York, USA, since April 1982; Director, Swiss American
                                         Securities, Inc., New York, New York, USA, since March 1983.
 
Walter G. Frehner                        Director, Novartis Inc.; Chairman of the Board of Directors, Swiss Bank
  Inzlingerstrasse 276                   Corporation, Basle, Switzerland, from April 1993 through May 1996;
  CH-4125 Riehen                         President of the Executive Board, Swiss Bank Corporation, Basle,
  Switzerland                            Switzerland, January 1987 through April 1993; Director Ciba-Geigy
                                         Limited, from 1994 through December 1996; Director, Baloise Holding,
                                         since June 1989; Director, SMH Swiss Corporation for Microelectronics
                                         and Watchmaking Industries Ltd., Biel, Switzerland, since November 1978;
                                         Director, Nestle AG, Vevey, Switzerland, May 1993 through June 1995;
                                         Director, Schindler Holding AG, Hergiswil, Switzerland, since August
                                         1984.
</TABLE>
 
                                      I-3
<PAGE>
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
Robert L. Genillard                      Director, Novartis Inc.; Director, Sandoz Ltd., more than five years
  1, Quai de Mont Blanc                  until December 1996; Director, Credit Suisse, Zurich, Switzerland;
  CH-1211 Geneva                         Director, CS Holding, Zurich, Switzerland; Vice Chairman of the
  Switzerland                            Supervisory Board, TBG Holdings NV, Monaco; Director, Clariden Bank,
                                         Zurich, Switzerland; Director Leu Holding AG, Switzerland, from 1990
                                         until 1995; Director, CS First Boston Group, Inc., New York, New York,
                                         USA, since 1991.
 
Alexandre F. Jetzer                      Director, Novartis Inc.; Member of the Executive Committee, Head of
  Novartis International Inc.            International Coordination, Human Resources, Legal, Tax, Novartis Inc.,
  Lichtstrasse 35                        since December 1996; President of the Executive Board, Sandoz Ltd.,
  CH-4002 Basle                          Lichtstrasse 35, CH-4002 Basle, Switzerland from January 1996 through
  Switzerland                            December 1996; Vice Chairman and CEO, Sandoz Corporation, 608 Fifth
                                         Avenue, New York, New York 10020, USA, from July 1995 through December
                                         1995; Chairman and Chief Executive Officer, Sandoz Pharmaceuticals
                                         Corporation, 59 Route 10, East Hanover, New Jersey, USA, from July 1995
                                         through December 1995; Member of the Group Executive Board, Sandoz Ltd.,
                                         Basle, Switzerland, for more than five years until June 1995; Director,
                                         Winterthur Insurance Ltd., Winterthur, Switzerland; Director, Clariden
                                         Bank, Zurich, Switzerland, until June 1995; Director, Leu Holding AG,
                                         Zug, Switzerland, from 1990 until 1995.
 
Pierre Landolt                           Director, Novartis Inc.; Director, Sandoz Ltd., Switzerland, more than
  Fazenda Tamandua                       five years until December 1996; Executive Director, Moco Agropecuaria
  Santa Terezinha-Paraiba                LTDA, Santa Terezinha-Paraiba, Brazil; Director, Misu Irrigacio
  PB 58772                               Industria e Comercio LTDA; Director; Fair Corretora de Cambio e Valores
  Brazil                                 LTD, Sao Paulo, Brazil; Chairman, Emasan SA Basle, Switzerland;
                                         Director, Banque Scandinave en Suisse, Geneva, Switzerland, since 1994.
 
Heini Lippuner                           Director, Novartis Inc.; retired President and Chief Operating Officer,
  Wartenbergstrasse 33                   Ciba-Geigy Limited, Klybeckstrasse 141, CH-4002, Basle, Switzerland,
  CH-4104 Oberwil                        Member of the Executive Committee, Ciba-Geigy Limited more than five
  Switzerland                            years through April, 1996; Director, Credit Suisse Group; Director,
                                         Credit Suisse First Boston; Director, Winterthur Insurance Company;
                                         Director, Buhler Ltd.
 
Prof. Dr. William J. Rutter***           Director, Novartis Inc.; Chairman of the Board of Directors, Chiron
  c/o Chiron Corporation                 Corporation, since 1981; Director, Ciba-Geigy Limited, from April 1995
  4560 Horton Street                     through December 1996; Director, Carnegie Institute of Washington, since
  Emeryville, CA 94608-2916              1995; Member, Board of Overseers, Harvard University, since 1992.
  USA
 
Dr. Jean Wander                          Director, Novartis Inc.; Director, Sandoz Ltd., Basle, Switzerland, more
  Bollwerk 21                            than five years through December 1996; Tax and Legal Advisor; Director,
  CH-3000 Berne                          Berner Tagblatt Medien AG, Berne, Switzerland.
  Switzerland
</TABLE>
 
                                      I-4
<PAGE>
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
Dr. Raymund Breu                         Chief Financial Officer, Member of the Executive Committee, Novartis
  Novartis International Inc.            Inc.; Chief Financial Officer and Member of the Executive Committee,
  Lichtstrasse 35                        Sandoz Ltd., from 1993 through December 1996; Group Treasurer, Sandoz
  CH-4002 Basle                          Ltd., Lichtstrasse 35, CH-4002 Basle, Switzerland, from 1990 through
  Switzerland                            1993.
 
Dr. Hans Kindler                         Head of Swiss Services, Member of the Executive Committee, Novartis
                                         Inc.; Member of the Executive Committee, responsible for Personnel,
                                         Production and Technology, and Safety and Environmental Protection,
                                         Ciba-Geigy Limited, Klybeckstrasse 141, CH-4002, Basle, Switzerland,
                                         from 1990 through December 1996; Director, Lanz AG, Oensingen,
                                         Switzerland.
 
Pierre Douaze****                        Head of Healthcare Division, Member of the Executive Committee, Novartis
  Novartis Pharma Inc.                   Inc.; Member of the Executive Committee, responsible for the Pharma,
  Lichtstrasse 35                        Self-Medication and Diagnostics Divisions, and worldwide head of Pharma
  CH-4002 Basle                          Division, Ciba-Geigy Limited, Klybeckstrasse 141, CH-4002, Basle,
  Switzerland                            Switzerland from 1991 through December 1996.
 
Dr. Wolfgang Samo                        Head of Agribusiness Division, Member of the Executive Committee,
  Novartis International Inc.            Novartis Inc.; Member of the Executive Committee, responsible for Plant
                                         Protection, Animal Health and Seeds Divisions and worldwide Head of the
                                         Plant Protection Division of Ciba-Geigy Limited, Klybeckstrasse 141,
                                         CH-4002, Basle, Switzerland from July 1991 through December 1996.
 
David Pyott*****                         Head of Nutrition Division, Member of the Executive Committee, Novartis
  Novartis International Inc.            Inc.; Head of Nutrition Division, Sandoz Ltd., Lichtstrasse 35, CH-4002,
                                         Basle, Switzerland, from May 1995 through December 1996; held various
                                         positions within the Sandoz Group during previous five years.
 
Dr. Hermann Vodicka**                    Head of Specialty Chemicals, Member of the Executive Committee, Novartis
  Ciba Specialty Chemicals AG            Inc.; Member of the Executive Committee, responsible for the Polymers,
  Klybeckstrasse 141                     Composites, Mettler-Toledo, and Ciba Vision Divisions, and worldwide
  CH-4002 Basle                          Head of the Polymers Division of Ciba- Geigy Limited, Klybeckstrasse
  Switzerland                            141, CH-4002, Basle, Switzerland, from 1993 through March 1996;
                                         continuing Member of the Executive Committee, March through December
                                         1996; President of Mettler-Toledo, Greifensee, Switzerland, from
                                         November 1988 through November 1993; Director, HEXCEL Corp., 281 Tresser
                                         Blvd., Stamford, Connecticut, USA.
</TABLE>
 
- ------------------------
 
*    German Citizen
 
**   Austrian Citizen
 
***  U.S.A. Citizen
 
**** French Citizen
 
*****United Kingdom Citizen
 
                                      I-5
<PAGE>
    2.  DIRECTORS AND EXECUTIVE OFFICERS OF PURCHASER.  The following table sets
forth the name, current business address, citizenship and present principal
occupation or employment, and material occupations, positions, offices or
employments and business addresses thereof for the past five years of each
director and executive officer of Purchaser. Unless otherwise indicated, the
current business address of each person is 608 Fifth Avenue, New York, New York
10020. Unless otherwise indicated, each such person is a citizen of the United
States of America, and each occupation set forth opposite an individual's name
refers to employment with Purchaser.
 
<TABLE>
<CAPTION>
                                                       PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
           NAME, CITIZENSHIP                             MATERIAL POSITIONS HELD DURING THE PAST
     AND CURRENT BUSINESS ADDRESS                       FIVE YEARS AND BUSINESS ADDRESSES THEREOF
- ---------------------------------------  ------------------------------------------------------------------------
<S>                                      <C>
 
Edgar John Fullager*                     Director, President since 1996; Vice Chairman and Chief Executive
  Novartis Pharmaceuticals               Officer of Sandoz Corporation, New York, New York since January 1996;
    Corporation                          Chairman, Novartis Pharmaceuticals Corporation since January 1, 1997;
  59 Route 10                            Chairman, Sandoz Pharmaceuticals Corporation, East Hanover, New Jersey
  East Hanover, New Jersey 07936         January 1996 through December 1996; Member of the Executive Committee of
                                         Sandoz Pharma Ltd., Basle, Switzerland from 1994 through 1995; Chief
                                         Executive Officer of Sandoz Pharmaceuticals in the United Kingdom and
                                         Ireland, Vice President of the Association of British Pharmaceuticals
                                         Industries, from 1980 through 1993.
 
Robert L. Thompson, Jr.                  Director, Vice President, and Secretary since 1991; Executive Vice
  Novartis Corporation                   President, General Counsel and Secretary, Novartis Corporation, New
                                         York, New York since January 1, 1997; Vice President, General Counsel
                                         and Secretary, Sandoz Corporation, New York, New York 1989 through
                                         December 1996.
</TABLE>
 
- ------------------------
 
*   British Citizen
 
                                      I-6
<PAGE>
                                                                     SCHEDULE II
 
                                LEHMAN BROTHERS
 
                                                                January 10, 1997
 
Board of Directors
SyStemix, Inc.
3155 Porter Drive
Palo Alto, CA 94304
 
Members of the Board of Directors:
 
    We understand that Novartis, Inc. ("Novartis"), Novartis Biotech Holdings
Corporation, an indirect wholly-owned subsidiary of Novartis ("Purchaser"), and
SyStemix ("SyStemix" or the "Company") intend to enter into an Agreement and
Plan of Merger (the "Agreement") pursuant to which Purchaser will commence a
tender offer to purchase all of the outstanding shares of the Company's common
stock at $19.50 per share (the "Offer"). Pursuant to the terms and subject to
the conditions of the Agreement, after consummation of the Offer, Purchaser will
merge with and into the Company (the "Merger"). (The Merger, together with the
Offer, are hereinafter referred to as the "Proposed Transaction".) In the
Merger, all shares of the Company's common stock (other than (i) shares held in
the Company's treasury, (ii) shares held by Novartis or any of its subsidiaries,
and (iii) shares as to which dissenters' rights have been perfected) will be
exchanged for cash equal to the amount per share paid in the Offer. The other
terms and conditions of the Proposed Transaction are set forth in more detail in
the Agreement.
 
    We have been requested by Harold Edgar, Joseph Ruvane and Edgar Schollmaier,
in their capacity as members of the Board of Directors of the Company (the
"Independent Directors"), to render our opinion with respect to the fairness,
from a financial point of view, to the stockholders of the Company, other than
Novartis, of the consideration to be offered to such stockholders in the
Proposed Transaction. We have not been requested to opine as to, and our opinion
does not in any manner address, the Company's underlying business decision to
proceed with or effect the Proposed Transaction.
 
    In arriving at our opinion, we reviewed and analyzed: (1) the Agreement and
the specific terms of the Proposed Transaction, (2) the annual report of the
Company for the fiscal year ended December 31, 1995 filed on form 10-K, the
quarterly financial report of the Company for the fiscal quarter ended September
30, 1996 filed on Form 10-Q and such other publicly available information
concerning the Company that we believe to be relevant to our analysis, (3) other
financial and operating information with respect to the business, operations and
prospects of the Company furnished to us by the Company (including financial
projections for years 1996 to 2005 under various operating assumptions), (4) a
trading history of the Company's common stock from August 7, 1991 to the present
and a comparison of that trading history with those of other companies that we
deemed relevant, (5) a comparison of the historical financial results and
present financial condition of the Company with those of other companies that we
deemed relevant, (6) an analysis of the cash required to fund the Company's near
term capital and operating requirements, the cash currently available to the
Company and the alternatives available to the Company to obtain additional
financing, and (7) a comparison of the financial terms of the Proposed
Transaction with the financial terms of certain other recent transactions that
we deemed relevant. In addition, we have held discussions with the management of
the Company concerning its business, operations, assets, financial condition and
prospects and have undertaken such other studies, analyses and investigations as
we deemed appropriate.
 
    In arriving at our opinion, we have assumed and relied upon the accuracy and
completeness of the financial and other information used by us without assuming
any responsibility for independent verification of such information and further
have relied upon the assurances of management of the Company that they are not
aware of any facts or circumstances that would make such information inaccurate
or misleading. With respect to the financial projections of the Company, upon
the advice of the Company, we have
 
                                      II-1
<PAGE>
assumed that such projections have been reasonably prepared on a basis
reflecting the best currently available estimates and judgments of the
management of the Company as to the future financial performance of the Company.
However, for purposes of our analysis, we also have considered certain more
conservative assumptions and estimates which resulted in significant adjustments
to the projections of the Company. We have discussed these adjusted projections
with the Company's management and they have agreed that, because the Company's
projections have been prepared based on assumptions which include the success of
each of its products in human clinical trials and in the marketplace, it is
appropriate for us to adjust such projections to reflect the uncertainties
inherent in the business and prospects of the Company and in the Company's
ability to secure adequate financing in the future to fund its capital and
operating requirements. Without agreeing with each particular adjustment we have
made, the Company's management believes that the overall extent of our
adjustments to the Company's projections is reasonable and that our use of such
adjusted projections in our analysis is appropriate. In arriving at our opinion,
we have conducted only a limited physical inspection of the properties and
facilities of the Company and have not made or obtained any evaluations or
appraisals of the assets or liabilities of the Company. In addition, you have
not authorized us to solicit, and we have not solicited, any indications of
interest from any third party with respect to the purchase of all or a part of
the Company's business. Our opinion necessarily is based upon market, economic
and other conditions as they exist on, and can be evaluated as of, the date of
this letter.
 
    Based upon and subject to the foregoing, we are of the opinion as of the
date hereof that, from a financial point of view, the consideration to be
offered to the stockholders of the Company other than Novartis in the Proposed
Transaction is fair to such stockholders.
 
    We have acted as financial advisor to the Independent Directors in
connection with the Proposed Transaction and will receive a fee from the Company
for our services, which is contingent in part upon the consummation of the
Proposed Transaction. In addition, the Company has agreed to indemnify us for
certain liabilities that may arise out of the rendering of this opinion. In the
ordinary course of our business, we may trade in the equity securities of the
Company for our own account and for the accounts of our customers and,
accordingly, may at any time hold a long or short position in such securities.
 
    This opinion is for the use and benefit of the Independent Directors and is
rendered to the Independent Directors in connection with their consideration of
the Proposed Transaction. This opinion also is for the use and benefit of Irving
L. Weissman, M.D. and John J. Schwartz, Ph.D., in their capacity as members of
the Board of Directors of the Company, and is rendered to them in connection
with their consideration of the Proposed Transaction. This opinion is not
intended to be and does not constitute a recommendation to any stockholder of
the Company as to whether to accept the consideration to be offered to such
stockholder in connection with the Proposed Transaction.
 
<TABLE>
<S>                                          <C>        <C>
                                             Very truly yours,
 
                                             LEHMAN BROTHERS
</TABLE>
 
                                      II-2
<PAGE>
                                                                    SCHEDULE III
 
                  SUMMARY OF STOCKHOLDER APPRAISAL RIGHTS AND
                 TEXT OF SECTION 262 OF THE GENERAL CORPORATION
                          LAW OF THE STATE OF DELAWARE
 
    SUMMARY OF STOCKHOLDER APPRAISAL RIGHTS.  No appraisal rights are available
in connection with the Offer. However, if the Merger is consummated,
stockholders will have certain rights under Delaware Law to dissent and demand
appraisal of, and to receive payment in cash of the fair value of, their Shares.
Such rights to dissent, if the statutory procedures are complied with, could
lead to a judicial determination of the fair value of the Shares, as of the day
prior to the date on which the stockholders' vote was taken approving the Merger
or similar business combination (excluding any element of value arising from the
accomplishment or expectation of the Merger), required to be paid in cash to
such dissenting holders for their Shares. In addition, such dissenting
stockholders would be entitled to receive payment of a fair rate of interest
from the date of consummation of the Merger on the amount determined to be the
fair value of their Shares. In determining the fair value of the Shares, the
court is required to take into account all relevant factors. Accordingly, such
determination could be based upon considerations other than, or in addition to,
the market value of the Shares, including, among other things, asset values and
earning capacity. In WEINBERGER V. UOP, INC., the Delaware Supreme Court stated,
among other things, that "proof of value by any techniques or methods which are
generally considered acceptable in the financial community and otherwise
admissible in court" should be considered in an appraisal proceeding. Therefore,
the value so determined in any appraisal proceeding could be the same, more or
less than the purchase price per Share in the Offer or the Merger Consideration.
 
    In addition, several decisions by Delaware courts have held that, in certain
circumstances, a controlling stockholder of a company involved in a merger has a
fiduciary duty to other stockholders which requires that the merger be fair to
such other stockholders. In determining whether a merger is fair to minority
stockholders, Delaware courts have considered, among other things, the type and
amount of consideration to be received by the stockholders and whether there was
fair dealing among the parties. The Delaware Supreme Court stated in WEINBERGER
and RABKIN V. PHILIP A. HUNT CHEMICAL CORP. that the remedy ordinarily available
to minority stockholders in a cash-out merger is the right to appraisal
described above. However, a damages remedy or injunctive relief may be available
if a merger is found to be the product of procedural unfairness, including
fraud, misrepresentation or other misconduct.
 
                            GENERAL CORPORATION LAW
                            OF THE STATE OF DELAWARE
 
262 APPRAISAL RIGHTS.
 
    (a) Any stockholder of a corporation of this State who holds shares of stock
on the date of the making of a demand pursuant to subsection (d) of this section
with respect to such shares, who continuously holds such shares through the
effective date of the merger or consolidation, who has otherwise complied with
subsection (d) of this section and who has neither voted in favor of the merger
or consolidation nor consented thereto in writing pursuant to Section228 of this
title shall be entitled to an appraisal by the Court of Chancery of the fair
value of his shares of stock under the circumstances described in subsections
(b) and (c) of this section. As used in this section, the word "stockholder"
means a holder of record of stock in a stock corporation and also a member of
record of a nonstock corporation; the words "stock" and "share" mean and include
what is ordinarily meant by those words and also membership or membership
interest of a member of a nonstock corporation; and the words "depository
receipt" mean a receipt or other
 
                                     III-1
<PAGE>
instrument issued by a depository representing an interest in one or more
shares, or fractions thereof, solely of stock of a corporation, which stock is
deposited with the depository.
 
    (b) Appraisal rights shall be available for the shares of any class or
series of stock of a constituent corporation in a merger or consolidation to be
effected pursuant to Section251 (other than a merger effected pursuant to
subsection (g) of Section 251), 252, 254, 257, 258, 263 or 264 of this title:
 
        (1) Provided, however, that no appraisal rights under this section shall
    be available for the shares of any class or series of stock, which stock, or
    depository receipts in respect thereof, at the record date fixed to
    determine the stockholders entitled to receive notice of and to vote at the
    meeting of stockholders to act upon the agreement of merger or
    consolidation, were either (i) listed on a national securities exchange or
    designated as a national market system security on an interdealer quotation
    system by the National Association of Securities Dealers, Inc. or (ii) held
    of record by more than 2,000 holders; and further provided that no appraisal
    rights shall be available for any shares of stock of the constituent
    corporation surviving a merger if the merger did not require for its
    approval the vote of the holders of the surviving corporation as provided in
    subsection (f) of Section251 of this title.
 
        (2) Notwithstanding paragraph (1) of this subsection, appraisal rights
    under this section shall be available for the shares of any class or series
    of stock of a constituent corporation if the holders thereof are required by
    the terms of an agreement of merger or consolidation pursuant to
    SectionSection251, 252, 254, 257, 258, 263 and 264 of this title to accept
    for such stock anything except:
 
           a. Shares of stock of the corporation surviving or resulting from
       such merger or consolidation, or depository receipts in respect thereof;
 
           b. Shares of stock of any other corporation, or depository receipts
       in respect thereof, which shares of stock or depository receipts at the
       effective date of the merger or consolidation will be either listed on a
       national securities exchange or designated as a national market system
       security on an interdealer quotation system by the National Association
       of Securities Dealers, Inc. or held of record by more than 2,000 holders;
 
           c. Cash in lieu of fractional shares or fractional depository
       receipts described in the foregoing subparagraphs a. and b. of this
       paragraph; or
 
           d. Any combination of the shares of stock, depository receipts and
       cash in lieu of fractional shares or fractional depository receipts
       described in the foregoing subparagraphs a., b. and c. of this paragraph.
 
        (3) In the event all of the stock of a subsidiary Delaware corporation
    party to a merger effected under Section253 of this title is not owned by
    the parent corporation immediately prior to the merger, appraisal rights
    shall be available for the shares of the subsidiary Delaware corporation.
 
    (c) Any corporation may provide in its certificate of incorporation that
appraisal rights under this section shall be available for the shares of any
class or series of its stock as a result of an amendment to its certificate of
incorporation, any merger or consolidation in which the corporation is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation. If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.
 
    (d) Appraisal rights shall be perfected as follows:
 
        (1) If a proposed merger or consolidation for which appraisal rights are
    provided under this section is to be submitted for approval at a meeting of
    stockholders, the corporation, not less than 20 days prior to the meeting,
    shall notify each of its stockholders who was such on the record date for
    such meeting with respect to shares for which appraisal rights are available
    pursuant to subsections (b) or (c) hereof that appraisal rights are
    available for any or all of the shares of the constituent
 
                                     III-2
<PAGE>
    corporations, and shall include in such notice a copy of this section. Each
    stockholder electing to demand the appraisal of his shares shall deliver to
    the corporation, before the taking of the vote on the merger or
    consolidation, a written demand for appraisal of his shares. Such demand
    will be sufficient if it reasonably informs the corporation of the identity
    of the stockholder and that the stockholder intends thereby to demand the
    appraisal of his shares. A proxy or vote against the merger or consolidation
    shall not constitute such a demand. A stockholder electing to take such
    action must do so by a separate written demand as herein provided. Within 10
    days after the effective date of such merger or consolidation, the surviving
    or resulting corporation shall notify each stockholder of each constituent
    corporation who has complied with this subsection and has not voted in favor
    of or consented to the merger or consolidation of the date that the merger
    or consolidation has become effective; or
 
        (2) If the merger or consolidation was approved pursuant to Section228
    or Section253 of this title, each constituent corporation, either before the
    effective date of the merger or consolidation or within ten days thereafter,
    shall notify each of the holders of any class or series of stock of such
    constituent corporation who are entitled to appraisal rights of the approval
    of the merger or consolidation and that appraisal rights are available for
    any or all shares of such class or series of stock of such constituent
    corporation, and shall include in such notice a copy of this section;
    provided that, if the notice is given on or after the effective date of the
    merger or consolidation, such notice shall be given by the surviving or
    resulting corporation to all such holders of any class or series of stock of
    a constituent corporation that are entitled to appraisal rights. Such notice
    may, and, if given on or after the effective date of the merger or
    consolidation, shall, also notify such stockholders of the effective date of
    the merger or consolidation. Any stockholder entitled to appraisal rights
    may, within twenty days after the date of mailing of such notice, demand in
    writing from the surviving or resulting corporation the appraisal of such
    holder's shares. Such demand will be sufficient if it reasonably informs the
    corporation of the identity of the stockholder and that the stockholder
    intends thereby to demand the appraisal of such holder's shares. If such
    notice did not notify stockholders of the effective date of the merger or
    consolidation, either (i) each such constituent corporation shall send a
    second notice before the effective date of the merger or consolidation
    notifying each of the holders of any class or series of stock of such
    constituent corporation that are entitled to appraisal rights of the
    effective date of the merger or consolidation or (ii) the surviving or
    resulting corporation shall send such a second notice to all such holders on
    or within 10 days after such effective date; provided, however, that if such
    second notice is sent more than 20 days following the sending of the first
    notice, such second notice need only be sent to each stockholder who is
    entitled to appraisal rights and who has demanded appraisal of such holder's
    shares in accordance with this subsection. An affidavit of the secretary or
    assistant secretary or of the transfer agent of the corporation that is
    required to give either notice that such notice has been given shall, in the
    absence of fraud, be prima facie evidence of the facts stated therein. For
    purposes of determining the stockholders entitled to receive either notice,
    each constituent corporation may fix, in advance, a record date that shall
    be not more than 10 days prior to the date the notice is given; provided
    that, if the notice is given on or after the effective date of the merger or
    consolidation, the record date shall be such effective date. If no record
    date is fixed and the notice is given prior to the effective date, the
    record date shall be the close of business on the day next preceding the day
    on which the notice is given.
 
    (e) Within 120 days after the effective date of the merger or consolidation,
the surviving or resulting corporation or any stockholder who has complied with
subsections (a) and (d) hereof and who is otherwise entitled to appraisal
rights, may file a petition in the Court of Chancery demanding a determination
of the value of the stock of all such stockholders. Notwithstanding the
foregoing, at any time within 60 days after the effective date of the merger or
consolidation, any stockholder shall have the right to withdraw his demand for
appraisal and to accept the terms offered upon the merger or consolidation.
Within 120 days after the effective date of the merger or consolidation, any
stockholder who has complied with the requirements of subsections (a) and (d)
hereof, upon written request, shall be entitled to receive from the
 
                                     III-3
<PAGE>
corporation surviving the merger or resulting from the consolidation a statement
setting forth the aggregate number of shares not voted in favor of the merger or
consolidation and with respect to which demands for appraisal have been received
and the aggregate number of holders of such shares. Such written statement shall
be mailed to the stockholder within 10 days after his written request for such a
statement is received by the surviving or resulting corporation or within 10
days after expiration of the period for delivery of demands for appraisal under
subsection (d) hereof, whichever is later.
 
    (f) Upon the filing of any such petition by a stockholder, service of a copy
thereof shall be made upon the surviving or resulting corporation, which shall
within 20 days after such service file in the office of the Register in Chancery
in which the petition was filed a duly verified list containing the names and
addresses of all stockholders who have demanded payment for their shares and
with whom agreements as to the value of their shares have not been reached by
the surviving or resulting corporation. If the petition shall be filed by the
surviving or resulting corporation, the petition shall be accompanied by such a
duly verified list. The Register in Chancery, if so ordered by the Court, shall
give notice of the time and place fixed for the hearing of such petition by
registered or certified mail to the surviving or resulting corporation and to
the stockholders shown on the list at the addresses therein stated. Such notice
shall also be given by 1 or more publications at least 1 week before the day of
the hearing, in a newspaper of general circulation published in the City of
Wilmington, Delaware or such publication as the Court deems advisable. The forms
of the notices by mail and by publication shall be approved by the Court, and
the costs thereof shall be borne by the surviving or resulting corporation.
 
    (g) At the hearing on such petition, the Court shall determine the
stockholders who have complied with this section and who have become entitled to
appraisal rights. The Court may require the stockholders who have demanded an
appraisal for their shares and who hold stock represented by certificates to
submit their certificates of stock to the Register in Chancery for notation
thereon of the pendency of the appraisal proceedings; and if any stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.
 
    (h) After determining the stockholders entitled to an appraisal, the Court
shall appraise the shares, determining their fair value exclusive of any element
of value arising from the accomplishment or expectation of the merger or
consolidation, together with a fair rate of interest, if any, to be paid upon
the amount determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors, including the rate of
interest which the surviving or resulting corporation would have had to pay to
borrow money during the pendency of the proceeding. Upon application by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion, permit discovery
or other pretrial proceedings and may proceed to trial upon the appraisal prior
to the final determination of the stockholder entitled to an appraisal. Any
stockholder whose name appears on the list filed by the surviving or resulting
corporation pursuant to subsection (f) of this section and who has submitted his
certificates of stock to the Register in Chancery, if such is required, may
participate fully in all proceedings until it is finally determined that he is
not entitled to appraisal rights under this section.
 
    (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto. Interest may be simple or compound, as the Court
may direct. Payment shall be so made to each such stockholder, in the case of
holders of uncertificated stock forthwith, and the case of holders of shares
represented by certificates upon the surrender to the corporation of the
certificates representing such stock. The Court's decree may be enforced as
other decrees in the Court of Chancery may be enforced, whether such surviving
or resulting corporation be a corporation of this State or of any state.
 
    (j) The costs of the proceeding may be determined by the Court and taxed
upon the parties as the Court deems equitable in the circumstances. Upon
application of a stockholder, the Court may order all or a portion of the
expenses incurred by any stockholder in connection with the appraisal
proceeding,
 
                                     III-4
<PAGE>
including, without limitation, reasonable attorney's fees and the fees and
expenses of experts, to be charged pro rata against the value of all the shares
entitled to an appraisal.
 
    (k) From and after the effective date of the merger or consolidation, no
stockholder who has demanded his appraisal rights as provided in subsection (d)
of this section shall be entitled to vote such stock for any purpose or to
receive payment of dividends or other distributions on the stock (except
dividends or other distributions payable to stockholders of record at a date
which is prior to the effective date of the merger or consolidation); provided,
however, that if no petition for an appraisal shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to the surviving or resulting corporation a written withdrawal of his demand for
an appraisal and an acceptance of the merger or consolidation, either within 60
days after the effective date of the merger or consolidation as provided in
subsection (e) of this section or thereafter with the written approval of the
corporation, then the right of such stockholder to an appraisal shall cease.
Notwithstanding the foregoing, no appraisal proceeding in the Court of Chancery
shall be dismissed as to any stockholder without the approval of the Court, and
such approval may be conditioned upon such terms as the Court deems just.
 
    (l) The shares of the surviving or resulting corporation to which the shares
of such objecting stockholders would have been converted had they assented to
the merger or consolidation shall have the status of authorized and unissued
shares of the surviving or resulting corporation. (Last amended by Ch. 349, L.
'96, eff. 7-l-96.)
 
                                     III-5
<PAGE>
                                                                     SCHEDULE IV
 
                AUDITED FINANCIAL STATEMENTS (AND RELATED NOTES)
                      FOR THE COMPANY FOR THE YEARS ENDED
                    DECEMBER 31, 1994 AND DECEMBER 31, 1995
 
              REPORT OF ERNST & YOUNG L.L.P. INDEPENDENT AUDITORS
 
The Board of Directors and Stockholders
SyStemix, Inc.
 
    We have audited the accompanying consolidated balance sheets of SyStemix,
Inc. as of December 31, 1995 and 1994, and the related consolidated statements
of operations, stockholders' equity, and cash flows for each of the three years
in the period ended December 31, 1995. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of SyStemix, Inc.
as of December 31, 1995 and 1994 and the consolidated results of its operations
and its cash flows for each of the three years in the period ended December 31,
1995, in conformity with generally accepted accounting principles.
 
                                                               Ernst & Young LLP
 
Palo Alto, California
February 22, 1996
 
                                      IV-1
<PAGE>
                                 SYSTEMIX, INC.
 
                          CONSOLIDATED BALANCE SHEETS
 
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
<TABLE>
<CAPTION>
                                                                                                DECEMBER 31,
                                                                                          ------------------------
<S>                                                                                       <C>          <C>
                                                                                             1995         1994
                                                                                          -----------  -----------
 
<CAPTION>
                                               ASSETS
<S>                                                                                       <C>          <C>
CURRENT ASSETS
  Cash and cash equivalents.............................................................  $     1,679  $     1,474
  Short-term investments................................................................       65,836        6,916
  Accounts receivable...................................................................          256          243
  Prepaid expenses and other current assets.............................................        1,336        1,145
                                                                                          -----------  -----------
    TOTAL CURRENT ASSETS................................................................       69,107        9,778
PROPERTY AND EQUIPMENT, AT COST
  Furniture and equipment under capital leases..........................................       10,772       10,772
  Furniture and equipment...............................................................       17,482       12,054
  Leasehold improvements................................................................       42,389       38,895
  Construction in process...............................................................          905        1,367
                                                                                          -----------  -----------
                                                                                               71,548       63,088
  Less accumulated depreciation and amortization........................................      (20,995)     (11,090)
                                                                                          -----------  -----------
    NET PROPERTY AND EQUIPMENT..........................................................       50,553       51,998
Long-term investments...................................................................           --       18,155
Investment in gene therapy joint venture................................................           --        1,753
Deposits and other assets...............................................................          542          613
                                                                                          -----------  -----------
                                                                                          $   120,202  $    82,297
                                                                                          -----------  -----------
                                                                                          -----------  -----------
<CAPTION>
                                LIABILITIES AND STOCKHOLDERS' EQUITY
<S>                                                                                       <C>          <C>
CURRENT LIABILITIES
  Accounts payable and accrued liabilities..............................................  $     3,873  $     3,332
  Accrued compensation..................................................................        2,808        2,332
  Current portion of capital lease obligation...........................................        1,831        1,681
  Deferred revenue from related party...................................................        3,097          890
  Current portion of accrued rent.......................................................           69           --
                                                                                          -----------  -----------
    TOTAL CURRENT LIABILITIES...........................................................       11,678        8,235
Noncurrent portion of capital lease obligation..........................................        5,518        7,348
Accrued rent, less current portion......................................................        4,536        3,013
Commitments
STOCKHOLDER'S EQUITY
  Preferred stock, $0.01 par value; 1,000,000 shares authorized; none issued............           --           --
  Common stock, $0.01 par value; 30,000,000 shares authorized; 14,463,094 and 9,788,283
    shares issued and outstanding at December 31, 1995 and 1994, respectively...........          157          110
  Additional paid in capital............................................................      246,536      164,430
  Deferred compensation.................................................................         (404)        (408)
  Unrealized gain (loss) on short-term investments......................................          390         (309)
  Accumulated deficit...................................................................     (148,209)    (100,122)
                                                                                          -----------  -----------
    TOTAL STOCKHOLDERS' EQUITY..........................................................       98,470       63,701
                                                                                          -----------  -----------
                                                                                          $   120,202  $    82,297
                                                                                          -----------  -----------
                                                                                          -----------  -----------
</TABLE>
 
                            See accompanying notes.
 
                                      IV-2
<PAGE>
                                 SYSTEMIX, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                 FOR THE YEAR ENDED DECEMBER 31,
                                                                                ----------------------------------
<S>                                                                             <C>         <C>         <C>
                                                                                   1995        1994        1993
                                                                                ----------  ----------  ----------
REVENUES
  Collaborative research from related party...................................  $    2,168  $    3,211  $    5,883
  Collaborative research......................................................         152          --          --
  Research grants.............................................................         992         234         328
  Contract testing............................................................         165         669         213
  Other.......................................................................         139          --          --
                                                                                ----------  ----------  ----------
    Total revenues............................................................       3,616       4,114       6,424
EXPENSES
  Research and Development:
    Collaborative research....................................................       3,422       4,142       6,106
    Research grants...........................................................         992         234         328
    Contract testing..........................................................         150         422         209
    Gene therapy joint venture................................................       2,940       3,997       2,207
    Company-sponsored.........................................................      39,229      31,740      14,119
                                                                                ----------  ----------  ----------
      Total research and development..........................................      46,733      40,535      22,969
  General and administrative..................................................       8,110       8,819       8,173
                                                                                ----------  ----------  ----------
    TOTAL OPERATING EXPENSES..................................................      54,843      49,354      31,142
                                                                                ----------  ----------  ----------
LOSS FROM OPERATIONS..........................................................     (51,227)    (45,240)    (24,718)
Other income (expense)........................................................       3,140         852       6,265
                                                                                ----------  ----------  ----------
NET LOSS......................................................................  ($  48,087) ($  44,388) ($  18,453)
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
NET LOSS PER SHARE............................................................  ($    3.43) ($    4.54) ($    1.89)
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
WEIGHTED AVERAGE SHARES OUTSTANDING...........................................      14,028       9,773       9,738
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
</TABLE>
 
                            See accompanying notes.
 
                                      IV-3
<PAGE>
                                 SYSTEMIX, INC.
 
                 CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
 
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                           UNREALIZED
                                                                                           GAIN (LOSS)                  TOTAL
                                              COMMON STOCK         ADDITIONAL  DEFERRED        ON          ACCUM-       STOCK-
                                        -------------------------   PAID-IN     COMPEN-    SHORT-TERM      ULATED      HOLDERS'
                                           SHARES       AMOUNT      CAPITAL     SATION     INVESTMENTS     DEFICIT      EQUITY
                                        ------------  -----------  ----------  ---------  -------------  -----------  ----------
<S>                                     <C>           <C>          <C>         <C>        <C>            <C>          <C>
BALANCE AT DECEMBER 31, 1992..........     9,710,275   $     109   $  163,793  $    (397)   $      --    $   (37,281) $  126,224
Issuance of common stock for cash
  pursuant to option exercises........        41,525           1           19                                                 20
Deferred compensation related to
  issuance of certain stock options...                                    475       (475)                                     --
Amortization of deferred
  compensation........................                                               380                                     380
Net loss..............................                                                                       (18,453)    (18,453)
                                        ------------       -----   ----------  ---------        -----    -----------  ----------
BALANCE AT DECEMBER 31, 1993..........     9,751,800         110      164,287       (492)          --        (55,734)    108,171
Issuance of common stock for cash
  pursuant to option exercises........        36,483          --           13                                                 13
Deferred compensation related to
  issuance of certain stock options...                                    130       (130)                                     --
Amortization of deferred
  compensation........................                                               214                                     214
Unrealized gain (loss) on short-term
  investments.........................                                                           (309)                      (309)
Net loss..............................                                                                       (44,388)    (44,388)
                                        ------------       -----   ----------  ---------        -----    -----------  ----------
BALANCE AT DECEMBER 31, 1994..........     9,788,283         110      164,430       (408)        (309)      (100,122)     63,701
Issuance of common stock for cash
  pursuant to option exercises........        58,539          --           31                                                 31
Issuance of common stock to Sandoz,
  net of offering costs of $496.......     4,616,272          47       79,457                                             79,504
Deferred compensation related to
  issuance of certain stock options...                                    328       (328)                                     --
Amortization of deferred
  compensation........................                                               332                                     332
Change in unrealized gain (loss) on
  short-term investments..............                                                            699                        699
Contribution of Progenesys joint
  venture equity by Sandoz............                                  2,290                                              2,290
Net loss..............................                                                                       (48,087)    (48,087)
                                        ------------       -----   ----------  ---------        -----    -----------  ----------
BALANCE AT DECEMBER 31, 1995..........    14,463,094   $     157   $  246,536  $    (404)   $     390    $  (148,209) $   98,470
                                        ------------       -----   ----------  ---------        -----    -----------  ----------
                                        ------------       -----   ----------  ---------        -----    -----------  ----------
</TABLE>
 
                            See accompanying notes.
 
                                      IV-4
<PAGE>
                                 SYSTEMIX, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
                                 (IN THOUSANDS)
                INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS
 
<TABLE>
<CAPTION>
                                                                                 FOR THE YEAR ENDED DECEMBER 31,
                                                                                ----------------------------------
<S>                                                                             <C>         <C>         <C>
                                                                                   1995        1994        1993
                                                                                ----------  ----------  ----------
CASH FLOWS FROM OPERATING ACTIVITIES
  Net loss....................................................................  ($  48,087) ($  44,388) ($  18,453)
  Adjustments to reconcile net cash used by operating activities: Depreciation
    and amortization..........................................................       9,472       5,541       3,203
    Changes in certain assets/liabilities:
      Accounts receivable.....................................................         (13)        738        (802)
      Prepaid expenses and other current assets...............................         (72)       (309)       (683)
      Deposits and other assets...............................................          71        (120)       (361)
      Accounts payable and accrued liabilities................................        (767)     (3,599)      4,742
      Accrued compensation....................................................         476       1,203         888
      Investment in gene therapy joint venture................................         365      (1,753)         --
      Accrued rent............................................................       1,592       1,374       1,605
      Deferred revenue from related party.....................................       2,207         890        (452)
                                                                                ----------  ----------  ----------
        Total adjustments.....................................................      13,331       3,965       8,140
                                                                                ----------  ----------  ----------
NET CASH USED BY OPERATING ACTIVITIES.........................................     (34,756)    (40,423)    (10,313)
 
CASH FLOWS FROM INVESTING ACTIVITIES
    Capital expenditures......................................................      (4,259)    (22,152)    (28,878)
    Purchases of available-for-sale investments...............................    (104,043)    (14,007)         --
    Proceeds from sales of available-for-sale investments.....................      22,299      55,328          --
    Proceeds from maturities of available-for-sale investments................      41,678      14,706          --
    Purchases of investments..................................................          --          --    (165,172)
    Proceeds from sales of investments........................................          --          --     197,220
                                                                                ----------  ----------  ----------
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES...........................     (44,325)     33,875       3,170
                                                                                ----------  ----------  ----------
 
CASH FLOWS FROM FINANCING ACTIVITIES
    Payments under capital lease obligations..................................      (1,680)     (1,404)       (521)
    Proceeds under capital lease obligations..................................          --       4,033       5,893
    Net proceeds from issuance of common stock................................      79,535          13          20
    Net proceeds from dissolution of the joint venture........................       1,431          --          --
                                                                                ----------  ----------  ----------
NET CASH PROVIDED BY FINANCING ACTIVITIES.....................................      79,286       2,642       5,392
                                                                                ----------  ----------  ----------
 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS..........................         205      (3,906)     (1,751)
 
Cash and cash equivalents at beginning of year................................       1,474       5,380       7,131
                                                                                ----------  ----------  ----------
Cash and cash equivalents at end of year......................................  $    1,679  $    1,474  $    5,380
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
SUPPLEMENTAL SCHEDULE NON-CASH INVESTING AND FINANCING ACTIVITIES:
  Net assets transferred from dissolution of joint venture....................  $    2,248  $       --  $       --
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
  Deferred compensation related to the issuance of stock options..............  $      328  $      130  $      475
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
SUPPLEMENTAL SCHEDULE OF CASH FLOW INFORMATION:
  Interest paid during the year...............................................  $      716  $      687  $      170
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
</TABLE>
 
                            See accompanying notes.
 
                                      IV-5
<PAGE>
                                 SYSTEMIX, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                               DECEMBER 31, 1995
 
1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    ORGANIZATION
 
    SyStemix, Inc. (the "Company"), incorporated in the State of Delaware on May
13, 1988, is a biotechnology company focused on creating new cellular and
cell-based gene therapies for major disorders of the blood and immune system
based on the use of the human hematopoietic stem cell.
 
    PRINCIPLES OF CONSOLIDATION
 
    The consolidated financial statements include the accounts of the Company
and its wholly owned subsidiaries. All significant intercompany balances and
transactions have been eliminated.
 
    DEPRECIATION AND AMORTIZATION
 
    The Company depreciates property and equipment using the straight-line
method over the estimated useful lives of the assets, ranging from three to five
years. Furniture and equipment leased under capital leases are amortized using
the straight-line method over the lease term. Leasehold improvements are
amortized using the straight-line method over the shorter of their useful lives
or the facility lease term (generally 10 years). Depreciation and amortization
expense for the year ended December 31, 1995 was $9.1 million ($5.3 million in
1994 and $2.8 million in 1993).
 
    USE OF ESTIMATES
 
    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.
 
    NET LOSS PER SHARE
 
    Net loss per share is computed using the weighted average number of shares
of common stock outstanding. Common equivalent shares from stock options are
excluded from the computation as their effect is antidilutive.
 
    CASH AND CASH EQUIVALENTS
 
    Cash and cash equivalents consist of cash held in commercial banks, time
deposits and other highly liquid investments with an original maturity of 90
days or less. Cash equivalents are readily convertible into cash and have
insignificant interest rate risk.
 
    INVESTMENTS
 
    Management determines the appropriate classification of debt securities at
the time of purchase and reevaluates such designation as of each balance sheet
date. Debt securities are classified as held to maturity when the Company has a
positive intent and ability to hold the securities to maturity. Held-to-maturity
securities are stated at amortized cost, adjusted for amortization of premiums
and accretion of discounts to maturity. Such amortization is included in
interest income. Marketable debt securities not classified as held-to-maturity
are classified as available-for-sale. Available-for-sale securities are carried
at
 
                                      IV-6
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
fair value based on quoted market prices, with the unrealized gains and losses
reported in a separate component of stockholders' equity. The amortized cost of
debt securities classified as available-for-sale is adjusted for amortization of
premiums and accretion of discounts to maturity. Such amortization is included
in interest income. Realized gains or losses and declines in value judged to be
other-than-temporary are included in other income. For the year ended December
31, 1995, the gross realized gains and losses on available-for-sale and
held-to-maturity securities were immaterial. The cost of securities sold is
based on the specific identification method. With the exception of securities
issued by the U.S. government, by policy the Company limits the amount of credit
exposure to any one issuer. The Company has not experienced any significant
losses related to these investments.
 
    REVENUE RECOGNITION
 
    Collaborative research revenue earned is based on research expenses
incurred. Amounts received in advance of services to be performed are recorded
as deferred revenue until the related expenses are incurred. Milestone payments
are recognized as revenue in the period earned.
 
    The Company has received government grants which support the Company's
research effort in specific research projects. These grants generally provide
for reimbursement of approved costs incurred as defined in the various
agreements.
 
    Contract testing revenue is recognized in the period earned on a cost plus
basis as defined in the relevant agreements.
 
    STOCK COMPENSATION
 
    In October 1995, the Financial Accounting Standards Board ("FASB") issued
Statement No. 123, "Accounting for Stock-Based Compensation ("SFAS 123"). SFAS
123 is effective for fiscal years beginning after December 15, 1995. Under SFAS
123 stock-based compensation expense to employees is measured using either the
intrinsic value method as prescribed by Accounting Principle Board Opinion No.
25 or the fair-value method described in SFAS 123. Companies choosing the
intrinsic-value method will be required to disclose the pro-forma impact of the
fair-value method on net income and earnings per share. The Company plans to
implement the standard in 1996 using the instrinsic-value method for stock
awards to employees. There will be no effect of adopting the standard on the
Company's financial position or results of operations.
 
    IMPAIRMENT/DISPOSITION OF LONG-LIVED ASSETS
 
    In March 1995, the FASB issued Statement No. 121, "Accounting for the
Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed Of"
(SFAS 121"), which requires impairment losses to be recorded on long-lived
assets used in operations when indicators of impairment are present and the
undiscounted cash flows estimated to be generated by those assets are less than
the assets' carrying amount. SFAS 121 also addresses the accounting for
long-lived assets that are expected to be disposed of. The Company will adopt
SFAS 121 in the first quarter of 1996. Based on current circumstances the
Company believes there will be no effect of adopting the standard on the
Company's financial position or results of operations.
 
                                      IV-7
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
2. SANDOZ LTD. INVESTMENT
 
    On February 19, 1992, Sandoz Biotech Holdings Corporation ("Sandoz
Biotech"), an indirect wholly owned subsidiary of Sandoz Ltd., concluded a
tender offer for 4,011,684 shares of the Company's Common Stock, or 49.13% of
the Company's then outstanding shares (on a fully diluted basis) for $70 per
share. In addition, on February 19, 1992 the Company issued 1,982,143 additional
shares of the Company's Common Stock for $56 per share or an aggregate of
approximately $111 million, thereby raising Sandoz Biotech's aggregated
ownership to 60%.
 
    On January 30, 1995 the Company and Sandoz Biotech entered into a stock and
warrant purchase agreement whereby the Company issued to Sandoz Biotech, on
February 2, 1995, an additional 4,616,272 shares of common stock and warrants to
purchase an additional 1,367,600 shares of common stock in exchange for proceeds
of $80.0 million. The warrants have an exercise price of $27.50 per share and
are exercisable during a three year period ending February 2, 1998. Certain
portions of the 1992 acquisition agreement were amended to allow this
transaction. The amended acquisition agreement provides that until December 16,
1998, Sandoz Biotech is prohibited from increasing its share holding above 71.6%
on a fully-diluted basis (73.9% if the warrants are exercised in full), and from
December 17, 1998 to February 18, 2002 above 75%. Sandoz Biotech is, however,
permitted to make a tender offer for 100% of the Company's outstanding shares of
common stock at any time, but only if the offer is approved by a majority of the
Company's independent directors. As of December 31, 1995, Sandoz Biotech held
10,610,099 shares of the Company's common stock.
 
3. JOINT VENTURE AGREEMENT WITH SANDOZ PHARMACEUTICAL CORP.
 
    In April 1993, the Company and Sandoz Pharmaceutical Corp., a wholly owned
affiliate of Sandoz Pharma, Ltd. (collectively "Sandoz"), formed an equally
owned joint venture ("Progenesys") to research and develop hematopoietic
cell-based, somatic gene therapies against HIV infection. The Company and Sandoz
licensed their initial technologies within the field to Progenesys. In addition,
the Company and Sandoz were each obligated to provide $5.0 million of funding
annually to Progenesys through March 1996. The Company accounted for its
investment in Progenesys under the equity method. On August 31, 1995, the
Company and Sandoz dissolved Progenesys and entered into an agreement for
research and development of hematopoietic cell-based somatic gene therapy or
prophylaxis of HIV infection (the "HIV Gene Therapy Collaboration"). The terms
and conditions of the HIV Gene Therapy Collaboration agreement are substantially
equivalent to those of the partnership agreement of April 1993 which created
Progenesys. Under the terms of both agreements, the Company and Sandoz are
obligated to fund the project equally. Commencing April 1996, the Company, at
its option may elect to have Sandoz fund a portion or all of the Company's
obligation, to be repaid out of future profits, if any, of the project. The
Company intends to elect this option as of April 1996. As a result the Sandoz
funding will be treated as collaborative research revenues.
 
    After the dissolution of the partnership, the net assets of Progenesys were
transferred to the Company resulting in a $2.29 million increase in paid in
capital associated with the contribution of Sandoz's interest in the joint
venture, and employees of the joint venture became employees of the Company. The
Company's share of Progenesys' operating loss amounted to $2.94 million (prior
to the dissolution of Progenesys) and $4.0 million for the years ended December
31, 1995 and 1994, respectively. Summarized
 
                                      IV-8
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
3. JOINT VENTURE AGREEMENT WITH SANDOZ PHARMACEUTICAL CORP. (CONTINUED)
information for Progenesys at August 31, 1995 (dissolution date) and December
31, 1994, and for the periods then ended is as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                             1995       1994
                                                                           ---------  ---------
<S>                                                                        <C>        <C>
Total Assets.............................................................             $   8,525
                                                                                      ---------
                                                                                      ---------
Total Liabilities........................................................             $     932
                                                                                      ---------
                                                                                      ---------
Expenses:
  Research and development...............................................  $   5,532  $   7,497
  General and administrative.............................................        332        497
                                                                           ---------  ---------
Net loss.................................................................  ($  5,864) ($  7,994)
                                                                           ---------  ---------
                                                                           ---------  ---------
</TABLE>
 
4. COLLABORATIVE RESEARCH AGREEMENTS WITH SANDOZ
 
    In July 1992, the Company entered into an agreement with Sandoz to work
jointly to identify and isolate a gene that encodes a growth factor that is
responsible for human stem cell self-renewal. Under the terms of the agreement,
the Company granted Sandoz worldwide rights to use the stem cell growth factor
("SCGF") for IN VIVO uses. The Company retained worldwide rights to use the
growth factor EX VIVO and the option to co-promote any resulting product in the
United States for IN VIVO uses. In exchange, Sandoz funded the Company's
research and development efforts on the SCGF project and made payments to the
Company upon the achievement of certain milestones. Pursuant to the terms of the
agreement permitting termination after 18 months, the SCGF collaboration ended
on June 30, 1994. The Company has reacquired rights previously granted for IN
VIVO uses and has continued to fund the SCGF project internally. Revenue earned
under the agreement during 1994 was $1.84 million ($5.66 million in 1993).
 
    In November 1993, the Company entered into a two-year agreement with Sandoz
to work jointly to develop and discover therapeutic agents for HIV infection
(the "Anti-Virals Collaboration"). Sandoz funded 50% of the research project.
The Company and Sandoz jointly decided to terminate the agreement as of March
31, 1995. Revenue earned in conjunction with this collaboration was $252,000 and
$1.37 million for the years ended December 31, 1995 and 1994, respectively.
 
5. INVESTMENTS
 
    The following is a summary of available-for-sale securities at December 31,
1995 and 1994:
 
                                      IV-9
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
5. INVESTMENTS (CONTINUED)
<TABLE>
<CAPTION>
                                                                          AVAILABLE-FOR SALE SECURITIES
                                              --------------------------------------------------------------------------------------
<S>                                           <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
                                                                           GROSS                 GROSS               ESTIMATED
                                                   AMORTIZED             UNREALIZED            UNREALIZED               FAIR
                                                      COST                 GAINS                 LOSSES                VALUE
                                              --------------------  --------------------  --------------------  --------------------
 
<CAPTION>
(IN THOUSANDS)                                  1995       1994       1995       1994       1995       1994       1995       1994
                                              ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                           <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
Asset-backed securities.....................  $     565  $   4,951  $      --  $      --  $      (5) $    (179) $     559  $   4,772
U.S. Corporate securities...................      8,624      2,585         33         --         --       (104)     8,657      2,481
U.S. Treasury securities and obligations of
  other U.S. government agencies............     34,286         --        203         --         --         --     34,489         --
U.S. Corporate commercial paper.............     12,325         --        158         --         --         --     12,483         --
Mortgage-backed securities..................         --      1,311         --         --         --        (26)        --      1,285
                                              ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                              $  55,799  $   8,847        394  $      --  $      (5) $    (309) $  56,188  $   8,538
                                              ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                              ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
</TABLE>
 
    The following is a summary of held-to-maturity securities at December 31,
1995 and 1994:
<TABLE>
<CAPTION>
                                                                        HELD-TO-MATURITY SECURITIES
                                               -----------------------------------------------------------------------------
<S>                                            <C>        <C>        <C>        <C>        <C>          <C>        <C>
                                                                            GROSS                  GROSS           ESTIMATED
                                                    AMORTIZED             UNREALIZED             UNREALIZED          FAIR
                                                       COST                 GAINS                  LOSSES            VALUE
                                               --------------------  --------------------  ----------------------  ---------
 
<CAPTION>
(IN THOUSANDS)                                   1995       1994       1995       1994        1995        1994       1995
                                               ---------  ---------  ---------  ---------     -----     ---------  ---------
<S>                                            <C>        <C>        <C>        <C>        <C>          <C>        <C>
U.S. Treasury securities and obligations of
  other U.S. government agencies.............  $   9,648  $  16,533  $      --  $      --   $      (8)  $    (499) $   9,640
                                                                                                   --
                                                                                                   --
                                               ---------  ---------  ---------  ---------               ---------  ---------
                                               ---------  ---------  ---------  ---------               ---------  ---------
 
<CAPTION>
 
<S>                                            <C>
 
(IN THOUSANDS)                                   1994
                                               ---------
<S>                                            <C>
U.S. Treasury securities and obligations of
  other U.S. government agencies.............  $  16,034
 
                                               ---------
                                               ---------
</TABLE>
 
    The amortized cost and estimated fair value of debt securities at December
31, 1995, by contractual maturity, are shown below. Expected maturities will
differ from contractual maturities because the issuers of the securities may
have the right to prepay obligations without prepayment penalties.
 
<TABLE>
<CAPTION>
                                                                            AVAILABLE-FOR-SALE
                                                                                SECURITIES
                                                                         ------------------------
                                                                                       ESTIMATED
                                                                          AMORTIZED      FAIR
                                                                            COST         VALUE
                                                                         -----------  -----------
(IN THOUSANDS)                                                              1995         1995
                                                                         -----------  -----------
<S>                                                                      <C>          <C>
Due in one year or less................................................   $  55,235    $  55,629
Due after one year through three years.................................         564          559
Due after three years..................................................          --           --
                                                                         -----------  -----------
                                                                          $  55,799    $  56,188
                                                                         -----------  -----------
                                                                         -----------  -----------
</TABLE>
 
    Held to maturity securities at December 31, 1995, due in one year or less,
were $9.65 million at amortized cost and $9.64 million at estimated fair value.
 
6. LEASE AND RENTAL COMMITMENTS
 
    During 1993 the Company converted its $1.5 million capital lease line with
an original principal value of $883,000 into a new $11 million capital lease
line. The Company refinanced $4.0 million and $5.9 million
 
                                     IV-10
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
6. LEASE AND RENTAL COMMITMENTS (CONTINUED)
of fixed assets under this new capital lease line during 1994 and 1993,
respectively. Under the terms of the capital lease line, the Company is required
to maintain compensating balances in its short-term and long-term investments
equal to 110% of the total principal amounts outstanding under the lease line,
which amounted to $8.2 million at December 31, 1995 and $10.1 million at
December 31, 1994.
 
    Accumulated amortization related to assets under all capital leases at
December 31, 1995 was $6.4 million ($4.3 million in 1994).
 
    The Company leases certain of its facilities under noncancelable operating
leases for an initial term plus renewal options. Total rent expense was
approximately $3.3 million in 1995 ($3.2 million in 1994 and $3.0 million in
1993). The Company recognizes rent expense on a straight-line basis over the
original lease term.
 
    Future minimum lease payments under operating leases (excluding aggregate
sublease rental income of $4.5 million) and capital leases, together with the
present value of the minimum lease payments as of December 31, 1995 are as
follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                                                           CAPITAL
                                                                                             OPERATING      LEASE
                                                                                              LEASES     OBLIGATIONS
                                                                                            -----------  -----------
<S>                                                                                         <C>          <C>
Year ending December 31:
      1996................................................................................   $   5,013    $   2,397
      1997................................................................................       4,751        2,397
      1998................................................................................       5,316        2,847
      1999................................................................................       5,671          913
      2000 and thereafter.................................................................      24,183           --
                                                                                            -----------  -----------
Total lease payments......................................................................   $  44,934        8,554
                                                                                            -----------
                                                                                            -----------
Less amount representing interest.........................................................                   (1,205)
                                                                                                         -----------
 
Present value of future lease payments....................................................                    7,349
Less current portion......................................................................                   (1,831)
                                                                                                         -----------
Noncurrent portion of capital lease obligations...........................................                $   5,518
                                                                                                         -----------
                                                                                                         -----------
</TABLE>
 
7. STOCK OPTION PLANS
 
    In March 1989, the Board of Directors of the Company approved the 1988 Stock
Option Plan (the "1988 Plan") whereby incentive and non-statutory options to
acquire common stock of the Company are granted to employees and officers of,
and consultants to, the Company. In June 1991, the Board of Directors of the
Company approved the 1991 Stock Option and Incentive Plan (the "1991 Plan" or,
together with the 1988 Plan, the "Plans") pursuant to which the committee
administering the Plans may grant incentive stock options, nonqualified stock
options, stock appreciation rights, restricted stock awards and performance
share awards (collectively with grants under the 1988 Plan, "Awards") to
participants. Awards under the 1991 Plan may be made to eligible employees of
the Company, including officers, and nonqualified stock options may be granted
to eligible consultants to the Company and, on a non-discretionary basis, to
certain non-employee directors of the Company. In June 1995, the Board of
 
                                     IV-11
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
7. STOCK OPTION PLANS (CONTINUED)
Directors of the Company and Shareholders authorized an increase of shares of
Common Stock for issuance under the Plans from 2,350,000 to 4,000,000 shares.
Under the Plans, the exercise price of incentive stock options granted may not
be less than 100% (110% in the case of any options granted to a person who owns
more than 10% of the total combined voting power of all classes of stock of the
Company) of the fair market value of the common stock on the date of grant of
the option. Awards generally become exercisable over a four-year period and
generally expire ten years from date of grant.
 
    In June 1994, the Board of Directors of the Company approved a resolution to
offer eligible employees (excluding executive officers) holding stock options
granted under the 1991 Plan the opportunity to exchange their original stock
options for new options granted at the then current fair market value. As a
result, options on 359,779 shares were canceled and regranted. Other than the
change in exercise price and addition of a restriction on exercise through
December 15, 1994, the new options were granted on the same terms and conditions
as the surrendered options.
 
    The Company has recorded deferred compensation expense for the difference
between the grant price and the fair market value of the Company's common stock
for certain Awards granted in 1995, 1994 and 1993. Amortization of deferred
compensation for the year ended December 31, 1995 was $332,000 ($214,000 is 1994
and $380,000 in 1993).
 
    Awards to purchase 766,332 shares of common stock were exercisable at an
aggregate price of approximately $14.3 million as of December 31, 1995 (398,992
shares at $5.3 million in 1994).
 
    Activity under the Plans was as follows:
 
<TABLE>
<CAPTION>
                                                                                   OUTSTANDING AWARDS
                                                               SHARES    ---------------------------------------
                                                             AVAILABLE                              AGGREGATE
                                                             FOR GRANT     SHARES       PRICE     (IN THOUSANDS)
                                                             ----------  ----------  -----------  --------------
<S>                                                          <C>         <C>         <C>          <C>
BALANCES AT DECEMBER 31, 1992..............................     261,234     644,428  $ .01-58.00    $   10,738
Authorization of additional shares for issuance............   1,000,000          --           --            --
Awards granted.............................................    (443,760)    443,760    .01-25.00         7,648
Awards exercised...........................................          --     (41,525)   .01-  .79           (20)
Awards canceled............................................      39,395     (39,395)   .01-54.50          (525)
                                                             ----------  ----------  -----------       -------
 
BALANCES AT DECEMBER 31, 1993..............................     856,869   1,007,268    .01-58.00        17,841
Awards granted.............................................    (990,469)    990,469    .01-41.25        16,704
Awards exercised...........................................          --     (36,483)   .01-17.25           (13)
Awards canceled............................................     475,638    (475,638)   .01-58.00        (8,859)
                                                             ----------  ----------  -----------       -------
 
BALANCES AT DECEMBER 31, 1994..............................     342,038   1,485,616    .01-41.25        25,673
Authorization of additional shares for issuance............   1,650,000          --           --            --
Awards granted.............................................    (652,825)    652,825    .01-19.25         8,797
Awards exercised...........................................          --     (58,539)   .01-12.76           (32)
Awards canceled............................................     385,721    (385,721)   .01-23.00        (6,051)
                                                             ----------  ----------  -----------       -------
 
BALANCES AT DECEMBER 31, 1995..............................   1,724,934   1,694,181  $ .01-23.00    $   28,387
                                                             ----------  ----------  -----------       -------
                                                             ----------  ----------  -----------       -------
</TABLE>
 
                                     IV-12
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
8. OTHER INCOME (EXPENSE)
 
    Other income (expense) consists of the following (in thousands):
 
<TABLE>
<CAPTION>
                                                                                         1995       1994       1993
                                                                                       ---------  ---------  ---------
<S>                                                                                    <C>        <C>        <C>
Interest income......................................................................  $   4,302  $   2,455  $   5,512
Realized gain (loss) on sale of marketable securities................................        (87)      (835)       929
Loss on disposal of property and equipment...........................................       (270)        --         --
Interest expense.....................................................................       (716)      (687)      (170)
Other................................................................................        (89)       (81)        (6)
                                                                                       ---------  ---------  ---------
                                                                                       $   3,140  $     852  $   6,265
                                                                                       ---------  ---------  ---------
                                                                                       ---------  ---------  ---------
</TABLE>
 
9. AGREEMENTS WITH STANFORD UNIVERSITY
 
    In September 1992, the Company amended the development and license agreement
with Stanford University which allows the Company to use Stanford's technology
and licensed patents relating to the SCID-hu mouse for the purpose of
developing, manufacturing and selling any products derived therefrom. The
license is exclusive for a term commencing January 1, 1992 and will end March 1,
2000. In exchange for the use of the technology, the Company has made $75,000
payments to Stanford in 1995, 1994 and 1993 which were charged to research and
development expense and will continue to make annual payments. In addition, the
Company will pay royalties upon the successful commercialization of any products
under terms specified in the agreement.
 
    In March 1994, the Company together with Sandoz agreed to provide funding
for a portion of the research carried out at Stanford University School of
Medicine. The Company provided $796,000 of funding in 1995 and $960,000 in 1994
and will fund the research program through December 1996; the amount and nature
of the 1996 funding is under negotiation. The research is directed by Dr. Irving
Weissman as Principal Investigator. Dr. Weissman is a director, consultant, and
chairman of the scientific advisory board of the Company. The agreement provides
that the Company and Sandoz have the right to negotiate with Stanford for a
license on commercially reasonable terms for intellectual property, if any, that
results from the funding. The research funded under this agreement is not
currently funded in any way by any other party.
 
10. FEDERAL INCOME TAXES
 
    As of December 31, 1995, the Company has net operating loss carryforwards of
approximately $120.0 million for federal income tax purposes. These
carryforwards, if not utilized to offset taxable income in future periods, will
expire in the years 2003 through 2010.
 
    Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
and the amounts used for income tax purposes. Significant components of the
Company's deferred tax assets and liabilities for federal and state income taxes
as of December 31, 1995 and 1994 are as follows:
 
                                     IV-13
<PAGE>
                                 SYSTEMIX, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                               DECEMBER 31, 1995
 
10. FEDERAL INCOME TAXES (CONTINUED)
    Deferred tax assets (in thousands):
 
<TABLE>
<CAPTION>
                                                                            1995       1994
                                                                          ---------  ---------
<S>                                                                       <C>        <C>
Net operating loss carryforwards........................................  $  41,100  $  29,800
Research credits (expire in 2003 through 2010)..........................      4,400      3,300
Capitalized research and development....................................      6,100      3,400
Other...................................................................      5,800      2,500
                                                                          ---------  ---------
Total deferred tax assets...............................................     57,400     39,000
Valuation allowance for deferred tax assets.............................    (57,400)   (39,000)
                                                                          ---------  ---------
Net deferred tax assets.................................................  $       0  $       0
                                                                          ---------  ---------
                                                                          ---------  ---------
</TABLE>
 
    Utilization of the net operating losses and credits may be subject to an
annual limitation due to the change in ownership limitations provided by the
Internal Revenue Code 1986.
 
    The valuation allowance for deferred tax assets increased by approximately
$17.0 million and $7.0 million for the year ended December 31, 1994 and 1993,
respectively.
 
                                     IV-14
<PAGE>
                                                                      SCHEDULE V
 
               UNAUDITED FINANCIAL STATEMENTS (AND RELATED NOTES)
                      FOR THE COMPANY FOR THE PERIOD ENDED
                               SEPTEMBER 30, 1996
                                 SYSTEMIX, INC.
 
                     CONDENSED CONSOLIDATED BALANCE SHEETS
 
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                      SEPTEMBER 30,  DECEMBER 31,
                                                                                          1996           1995
                                                                                      -------------  ------------
<S>                                                                                   <C>            <C>
                                                     ASSETS
CURRENT ASSETS
  Cash and cash equivalents.........................................................   $     1,995    $    1,679
  Short-term investments............................................................        48,373        65,836
  Accounts receivable...............................................................           259           256
  Prepaid expenses and other current assets.........................................         1,164         1,336
                                                                                      -------------  ------------
    TOTAL CURRENT ASSETS............................................................        51,791        69,107
Net property and equipment..........................................................        44,862        50,553
Deposits and other assets...........................................................           617           542
                                                                                      -------------  ------------
                                                                                       $    97,270    $  120,202
                                                                                      -------------  ------------
                                                                                      -------------  ------------
 
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES
  Accounts payable and accrued liabilities..........................................   $     6,744    $    6,681
  Current portion of capital lease obligation.......................................         1,951         1,831
  Deferred revenue from related party...............................................         8,400         3,097
  Current portion of accrued rent...................................................            54            69
                                                                                      -------------  ------------
    TOTAL CURRENT LIABILITIES.......................................................        17,149        11,678
Noncurrent portion of capital lease obligation......................................         4,037         5,518
Accrued rent, less current portion..................................................         4,730         4,536
 
STOCKHOLDERS' EQUITY
  Common stock......................................................................           165           157
  Additional paid in capital........................................................       246,827       246,536
  Deferred compensation.............................................................          (293)         (404)
  Unrealized gain on short-term investments.........................................           688           390
  Accumulated deficit...............................................................      (176,033)     (148,209)
                                                                                      -------------  ------------
    TOTAL STOCKHOLDERS' EQUITY......................................................        71,354        98,470
                                                                                      -------------  ------------
                                                                                       $    97,270    $  120,202
                                                                                      -------------  ------------
                                                                                      -------------  ------------
</TABLE>
 
                            See accompanying notes.
 
                                      V-1
<PAGE>
                                 SYSTEMIX, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                      THREE MONTHS ENDED      NINE MONTHS ENDED
                                                                         SEPTEMBER 30,          SEPTEMBER 30,
                                                                     ---------------------  ----------------------
<S>                                                                  <C>        <C>         <C>         <C>
                                                                       1996        1995        1996        1995
                                                                     ---------  ----------  ----------  ----------
REVENUES
    Collaborative research from related party......................  $   2,975  $      474  $    6,835  $      726
    Collaborative research.........................................         32          --         227          --
    Research grants................................................         15         117          79         798
    Contract testing...............................................         --          --          --         161
    Other..........................................................         31          44         110          44
                                                                     ---------  ----------  ----------  ----------
      TOTAL REVENUES...............................................      3,053         635       7,251       1,729
 
EXPENSES
  Research and development:
    Collaborative research.........................................      3,007         739       7,697       1,245
    Research grants................................................         15         117          79         798
    Gene therapy joint venture.....................................         --         862          --       2,940
    Company-sponsored..............................................      7,462       9,280      23,315      28,994
                                                                     ---------  ----------  ----------  ----------
      Total research and development...............................     10,484      10,998      31,091      33,977
  General and administrative.......................................      2,082       1,868       5,891       5,775
                                                                     ---------  ----------  ----------  ----------
      TOTAL OPERATING EXPENSES.....................................     12,566      12,866      36,982      39,752
                                                                     ---------  ----------  ----------  ----------
LOSS FROM OPERATIONS...............................................     (9,513)    (12,231)    (29,731)    (38,023)
Other income (net).................................................        666         990       1,907       2,783
                                                                     ---------  ----------  ----------  ----------
NET LOSS...........................................................     (8,847) $  (11,241)    (27,824)    (35,240)
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
NET LOSS PER SHARE.................................................  $    (.61) $     (.78) $    (1.92) $    (2.54)
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
SHARES USED IN COMPUTING NET LOSS PER SHARE........................     14,493      14,434      14,479      13,880
                                                                     ---------  ----------  ----------  ----------
                                                                     ---------  ----------  ----------  ----------
</TABLE>
 
                            See accompanying notes.
 
                                      V-2
<PAGE>
                                 SYSTEMIX, INC.
 
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
                INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                              NINE MONTHS ENDED
                                                                                                SEPTEMBER 30,
                                                                                            ----------------------
<S>                                                                                         <C>         <C>
                                                                                               1996        1995
                                                                                            ----------  ----------
CASH FLOWS FROM OPERATING ACTIVITIES
  Net loss................................................................................  $  (27,824) $  (35,240)
  ADJUSTMENTS TO RECONCILE NET CASH USED BY OPERATING ACTIVITIES:
    Depreciation and amortization.........................................................       7,427       6,717
    Changes in certain assets/liabilities:
      Accounts receivable.................................................................          (3)     (1,089)
      Prepaid expenses and other current assets...........................................         172         (18)
      Investment in gene therapy joint venture............................................          --         365
      Deposits and other assets...........................................................         (75)        109
      Accounts payable and other liabilities..............................................         242      (1,813)
      Deferred revenue....................................................................       5,303        (247)
                                                                                            ----------  ----------
        Total adjustments.................................................................      13,066       4,024
                                                                                            ----------  ----------
  NET CASH USED BY OPERATING ACTIVITIES...................................................     (14,758)    (31,216)
CASH FLOWS FROM INVESTING ACTIVITIES
  Capital expenditures....................................................................      (1,625)     (3,795)
  Net change in investments...............................................................      17,761     (17,466)
                                                                                            ----------  ----------
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES.......................................      16,136     (21,261)
                                                                                            ----------  ----------
CASH FLOWS FROM FINANCING ACTIVITIES
  Payments on capital lease obligations...................................................      (1,361)     (1,248)
  Net proceeds from issuance of common stock..............................................         299      79,585
  Net proceeds from dissolution of the joint venture......................................          --       1,431
                                                                                            ----------  ----------
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES.......................................      (1,062)     79,768
                                                                                            ----------  ----------
NET INCREASE IN CASH AND CASH EQUIVALENTS.................................................         316      27,291
Cash and cash equivalents at beginning of period..........................................       1,679       1,474
                                                                                            ----------  ----------
CASH AND CASH EQUIVALENTS AT END OF PERIOD................................................  $    1,995  $   28,765
                                                                                            ----------  ----------
                                                                                            ----------  ----------
SUPPLEMENTAL SCHEDULE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
  Deferred compensation related to the issuance of stock options..........................          --  $       42
                                                                                            ----------  ----------
                                                                                            ----------  ----------
  Net assets transferred from dissolution of the joint venture............................          --  $    2,248
                                                                                            ----------  ----------
                                                                                            ----------  ----------
SUPPLEMENTAL SCHEDULE OF CASH FLOW INFORMATION:
  Interest paid during the period.........................................................  $      440  $      551
                                                                                            ----------  ----------
                                                                                            ----------  ----------
</TABLE>
 
                             See accompanying notes
 
                                      V-3
<PAGE>
                                 SYSTEMIX, INC.
 
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
 
1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    ORGANIZATION
 
    SyStemix, Inc. (the "Company"), incorporated in the State of Delaware on May
13, 1988, is a biotechnology company focused on creating new cellular and
cell-based gene therapies for major disorders of the blood and immune system,
based on the use of the human hematopoietic stem cell.
 
    INTERIM FINANCIAL INFORMATION
 
    The balance sheet as of September 30, 1996, and the statements of operations
and cash flows for the three and nine month periods ended September 30, 1996 and
1995 are unaudited but include all adjustments (consisting of normal recurring
adjustments) which the Company considers necessary for a fair presentation of
the financial position at such dates and the operating results and cash flows
for those periods. Although the Company believes that the disclosures in these
financial statements are adequate to make the information presented not
misleading, certain information and footnote information normally included in
financial statements prepared in accordance with generally accepted accounting
principles have been condensed or omitted pursuant to the rules and regulations
of the Securities and Exchange Commission (the "SEC"). The December 31, 1995
condensed consolidated balance sheet was derived from audited financial
statements included in the Company's Form 10-K. The accompanying financial
statements should be read in conjunction with the financial statements and notes
thereto included in the Company's annual report on Form 10-K for the year ended
December 31, 1995 as filed with the SEC. Results for any interim period are not
necessarily indicative of results for any other interim period or for the entire
year.
 
    NET LOSS PER SHARE
 
    Net loss per share is computed using the weighted average number of shares
of common stock outstanding. Common equivalent shares from stock options and
warrants are excluded from the computation as their effect is antidilutive.
 
2. RESEARCH AND DEVELOPMENT COLLABORATION WITH SANDOZ PHARMACEUTICALS
CORPORATION
 
    In April 1993, the Company and Sandoz Pharmaceuticals Corporation, a wholly
owned affiliate of Sandoz Pharma, Ltd. (collectively "Sandoz"), formed an
equally owned joint venture ("Progenesys") to research and develop hematopoietic
cell-based, somatic gene therapies against HIV infection. The Company and Sandoz
licensed their initial technologies within the field to Progenesys. In addition,
the Company and Sandoz were each obligated to provide $5.0 million of funding
annually to Progenesys through March 1996. The Company accounted for its
investment in Progenesys under the equity method. On August 31, 1995, the
Company and Sandoz dissolved Progenesys and entered into a collaborative
agreement for research and development of hematopoietic cell-based somatic gene
therapy designed to prevent replication of HIV in symptomatic or asymptomatic
patients (the "HIV Gene Therapy Collaboration"). The terms and conditions of the
HIV Gene Therapy Collaboration agreement are substantially equivalent to those
of the partnership agreement of April 1993 which created Progenesys. Under the
terms of both agreements, the Company and Sandoz are obligated to fund the
project equally and share equally in the profits and losses of the project.
Commencing April 1996, the Company, pursuant to the terms of the HIV Gene
Therapy Collaboration Agreement, elected to have Sandoz fund all of the
Company's obligation, to be repaid out of future profits, if any, of the
project. The Sandoz funding is recognized as
 
                                      V-4
<PAGE>
                                 SYSTEMIX, INC.
 
        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
2. RESEARCH AND DEVELOPMENT COLLABORATION WITH SANDOZ PHARMACEUTICALS
CORPORATION (CONTINUED)
collaborative research revenues as expenses are incurred. Revenue earned under
the HIV Gene Therapy Collaboration was $6.84 million for the nine months ended
September 30, 1996. Sandoz Biotech Holdings Corporation, an indirect
wholly-owned subsidiary of Sandoz Ltd., is a majority shareholder of the
Company.
 
3. LEGAL PROCEEDINGS
 
    The Company has been served notice or been informed of six stockholder
lawsuits with respect to the May 23, 1996 Sandoz proposal to acquire all of the
shares of the Company that Sandoz does not already own, at a proposed price of
$17.00 per share. The lawsuits have been filed in the Court of Chancery of the
State of Delaware in New Castle County, each suit asking for class action status
and naming the Company, Sandoz and its affiliated entities, and the individual
members of the Company's Board of Directors as defendants. The suits have been
consolidated into one action and generally seek to enjoin consummation of the
Sandoz proposal on the grounds that the consideration to be paid to the public
shareholders under the proposal is unfair and inadequate. Pursuant to a
court-approved stipulation, dated July 15, 1996, no response to the suits will
be made by the defendants until 20 days after they receive notice that a
response is required. The litigation could result in substantial expense to the
Company and significant diversion of efforts of the Company's management team.
 
                                      V-5
<PAGE>
    Facsimiles of the Letter of Transmittal will be accepted. The Letter of
Transmittal and certificates evidencing Shares and any other required documents
should be sent or delivered by each stockholder or his broker, dealer,
commercial bank, trust company or other nominee to the Depositary at one of its
addresses set forth below.
 
                        THE DEPOSITARY FOR THE OFFER IS:
 
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                            <C>                            <C>
          BY MAIL:              BY FACSIMILE TRANSMISSION:        BY HAND/BY OVERNIGHT
   ChaseMellon Shareholder            (201) 329-8936              DELIVERY: ChaseMellon
      Services, L.L.C.                                                 Shareholder
  Reorganization Department                                         Services, L.L.C.
         PO Box 798                                             Reorganization Department
       Midtown Station                                                120 Broadway
     New York, NY 10018            Confirm by Telephone:               13th Floor
                                      (201) 296-4209               New York, NY 10271
</TABLE>
 
    Questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of this Offer to Purchase, the Letter of
Transmittal and the Notice of Guaranteed Delivery may be obtained from the
Information Agent. A stockholder may also contact brokers, dealers, commercial
banks or trust companies for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                                     [LOGO]
 
                               Wall Street Plaza
                            New York, New York 10005
 
                        Banks and Brokers Call Collect:
                                 (212) 440-9800
 
                           All Others Call Toll Free:
                                 1-800-223-2064
 
                        THE DEALER MANAGER FOR THE OFFER IS:
                              MORGAN STANLEY & CO.
                                     INCORPORATED
 
                                 1585 Broadway
                            New York, New York 10036
                                 (212) 761-7621

<PAGE>
                             LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
                                       OF
                                 SYSTEMIX, INC.
                       PURSUANT TO THE OFFER TO PURCHASE
                             DATED JANUARY 17, 1997
                                       OF
                         NOVARTIS BIOTECH HOLDING CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
                                 NOVARTIS INC.
 
                  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
                     AT 12:00 MIDNIGHT, NEW YORK CITY TIME,
           ON FRIDAY, FEBRUARY 14, 1997, UNLESS THE OFFER IS EXTENDED.
 
                        THE DEPOSITARY FOR THE OFFER IS:
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                                     <C>                          <C>
               BY MAIL:                 BY FACSIMILE TRANSMISSION:       BY HAND/BY OVERNIGHT DELIVERY:
  ChaseMellon Shareholder Services,     (FOR ELIGIBLE INSTITUTIONS     ChaseMellon Shareholder Services,
                L.L.C.                             ONLY)                             L.L.C.
      Reorganization Department               (201) 329-8936               Reorganization Department
             P.O. Box 798                  CONFIRM BY TELEPHONE:                  120 Broadway
           Midtown Station                    (201) 296-4209                       13th Floor
          New York, NY 10018                                                   New York, NY 10271
</TABLE>
 
                            ------------------------
 
  DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION OR TELEX OTHER
         THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
    THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
           CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
<PAGE>
    This Letter of Transmittal is to be completed by stockholders either if
certificates evidencing Shares (as defined below) are to be forwarded herewith
or if delivery of Shares is to be made by book-entry transfer to the
Depositary's account at The Depository Trust Company ("DTC"), the Midwest
Securities Trust Company ("MSTC") or the Philadelphia Depository Trust Company
("PDTC") (each a "Book-Entry Transfer Facility" and collectively, the
"Book-Entry Transfer Facilities") pursuant to the book-entry transfer procedure
described under "THE TENDER OFFER -- Section 3. Procedures for Accepting the
Offer and Tendering Shares" in the Offer to Purchase (as defined below).
DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE
DELIVERY TO THE DEPOSITARY.
 
    Stockholders whose certificates evidencing Shares ("Share Certificates") are
not immediately available or who cannot deliver their Share Certificates and all
other documents required hereby to the Depositary prior to the Expiration Date
(as defined under "THE TENDER OFFER -- Section 1. Terms of the Offer; Expiration
Date" in the Offer to Purchase) or who cannot complete the procedure for
delivery by book-entry transfer on a timely basis and who wish to tender their
Shares must do so pursuant to the guaranteed delivery procedure described under
"THE TENDER OFFER -- Section 3. Procedures for Accepting the Offer and Tendering
Shares" in the Offer to Purchase. See Instruction 2.
 
/ / CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE
    DEPOSITARY'S ACCOUNT AT ONE OF THE BOOK-ENTRY TRANSFER FACILITIES AND
    COMPLETE THE FOLLOWING:
 
    Name of Tendering Institution
  ---------------------------------------------------------------
 
    Check Box of Applicable Book-Entry Transfer Facility:
 
    (CHECK ONE)           / / DTC           / / MSTC          / / PDTC
 
    Account Number
  -----------------------------
 
    Transaction Code Number
  ---------------------
 
/ / CHECK HERE IF SHARES ARE BEING TENDERED PURSUANT TO A NOTICE OF GUARANTEED
    DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING:
 
    Name(s) of Registered Holder(s)
  -------------------------------------------------------------
 
    Window Ticket No. (if any)
  ------------------------------------------------------------------
 
    Date of Execution of Notice of Guaranteed Delivery
  --------------------------------------------
 
    Name of Institution which Guaranteed Delivery
  ------------------------------------------------
 
                                       2
<PAGE>
 
<TABLE>
<S>                                                   <C>           <C>               <C>
                                  DESCRIPTION OF SHARES TENDERED
  NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
   (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)
         APPEAR(S) ON SHARE CERTIFICATE(S))            SHARE CERTIFICATE(S) AND SHARE(S) TENDERED
                                                         (ATTACH ADDITIONAL LIST, IF NECESSARY)
                                                                    TOTAL NUMBER OF
                                                                    SHARES EVIDENCED
                                                         SHARE             BY          NUMBER OF
                                                      CERTIFICATE        SHARE           SHARES
                                                       NUMBER(S)*   CERTIFICATE(S)*    TENDERED**
                                                      TOTAL SHARES..................
   * Need not be completed by stockholders delivering Shares by book-entry transfer.
  ** Unless otherwise indicated, it will be assumed that all Shares evidenced by each Share
     Certificate delivered to the Depositary are being tendered hereby. See Instruction 4.
</TABLE>
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
Ladies and Gentlemen:
 
    The undersigned hereby tenders to Novartis Biotech Holding Corp., a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Novartis
Inc., a corporation organized under the laws of Switzerland, the above-described
shares of Common Stock, par value $.01 per share, of SyStemix, Inc., a Delaware
corporation (the "Company") (all shares of such Common Stock from time to time
outstanding being, collectively, the "Shares") pursuant to Purchaser's offer to
purchase all Shares, at $19.50 per Share, net to the seller in cash, upon the
terms and subject to the conditions set forth in the Offer to Purchase, dated
January 17, 1997 (the "Offer to Purchase"), receipt of which is hereby
acknowledged, and in this Letter of Transmittal (which, together with the Offer
to Purchase, constitute the "Offer"). The undersigned understands that Purchaser
reserves the right to transfer or assign, in whole or from time to time in part,
to one or more of its affiliates, the right to purchase all or any portion of
the Shares tendered pursuant to the Offer.
 
    Subject to, and effective upon, acceptance for payment of the Shares
tendered herewith, in accordance with the terms of the Offer, the undersigned
hereby sells, assigns and transfers to, or upon the order of, Purchaser all
right, title and interest in and to all the Shares that are being tendered
hereby and all dividends, distributions (including, without limitation,
distributions of additional Shares) and rights declared, paid or distributed in
respect of such Shares on or after January 10, 1997 (collectively,
"Distributions") and irrevocably appoints the Depositary the true and lawful
agent and attorney-in-fact of the undersigned with respect to such Shares and
all Distributions, with full power of substitution (such power of attorney being
deemed to be an irrevocable power coupled with an interest), to (i) deliver
Share Certificates evidencing such Shares and all Distributions, or transfer
ownership of such Shares and all Distributions on the account books maintained
by a Book-Entry Transfer Facility, together, in either case, with all
accompanying evidences of transfer and authenticity, to or upon the order of
Purchaser, (ii) present such Shares and all Distributions for transfer on the
books of the Company and (iii) receive all benefits and otherwise exercise all
rights of beneficial ownership of such Shares and all Distributions, all in
accordance with the terms of the Offer.
<PAGE>
    The undersigned hereby irrevocably appoints Edgar John Fullager and Robert
L. Thompson, Jr. and each of them, as the attorneys and proxies of the
undersigned, each with full power of substitution, to vote in such manner as
each such attorney and proxy or his substitute shall, in his sole discretion,
deem proper and otherwise act (by written consent or otherwise) with respect to
all the Shares tendered hereby which have been accepted for payment by Purchaser
prior to the time of such vote or other action and all Shares and other
securities issued in Distributions in respect of such Shares, which the
undersigned is entitled to vote at any meeting of stockholders of the Company
(whether annual or special and whether or not an adjourned or postponed meeting)
or consent in lieu of any such meeting or otherwise. This proxy and power of
attorney is coupled with an interest in the Shares tendered hereby, is
irrevocable and is granted in consideration of, and is effective upon, the
acceptance for payment of such Shares by Purchaser in accordance with the terms
of the Offer. Such acceptance for payment shall revoke all other proxies and
powers of attorney granted by the undersigned at any time with respect to such
Shares (and all Shares and other securities issued in Distributions in respect
of such Shares), and no subsequent proxy or power of attorney shall be given or
written consent executed (and if given or executed, shall not be effective) by
the undersigned with respect thereto. The undersigned understands that, in order
for Shares to be deemed validly tendered, immediately upon Purchaser's
acceptance of such Shares for payment, Purchaser must be able to exercise full
voting and other rights with respect to such Shares, including, without
limitation, voting at any meeting of the Company's stockholders then scheduled.
 
    The undersigned hereby represents and warrants that the undersigned has full
power and authority to tender, sell, assign and transfer the Shares tendered
hereby and all Distributions, that when such Shares are accepted for payment by
Purchaser, Purchaser will acquire good, marketable and unencumbered title
thereto and to all Distributions, free and clear of all liens, restrictions,
charges and encumbrances, and that none of such Shares and Distributions will be
subject to any adverse claim. The undersigned, upon request, shall execute and
deliver all additional documents deemed by the Depositary or Purchaser to be
necessary or desirable to complete the sale, assignment and transfer of the
Shares tendered hereby and all Distributions. In addition, the undersigned shall
remit and transfer promptly to the Depositary for the account of Purchaser all
Distributions in respect of the Shares tendered hereby, accompanied by
appropriate documentation of transfer, and pending such remittance and transfer
or appropriate assurance thereof, Purchaser shall be entitled to all rights and
privileges as owner of each such Distribution and may withhold the entire
purchase price of the Shares tendered hereby, or deduct from such purchase price
the amount or value of such Distribution as determined by Purchaser in its sole
discretion.
 
    No authority herein conferred or agreed to be conferred shall be affected
by, and all such authority shall survive, the death or incapacity of the
undersigned. All obligations of the undersigned hereunder shall be binding upon
the heirs, personal representatives, successors and assigns of the undersigned.
Except as stated in the Offer to Purchase, this tender is irrevocable.
 
    The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in the Offer to Purchase under "THE TENDER
OFFER--Section 3. Procedures for Accepting the Offer and Tendering Shares" and
in the instructions hereto will constitute the undersigned's acceptance of the
terms and conditions of the Offer. Purchaser's acceptance of such Shares for
payment will constitute a binding agreement between the undersigned and
Purchaser upon the terms and subject to the conditions of the Offer.
 
    Unless otherwise indicated herein in the box entitled "Special Payment
Instructions", please issue the check for the purchase price of all Shares
purchased, and return all Share Certificates evidencing Shares not purchased or
not tendered in the name(s) of the registered holder(s) appearing above under
"Description of Shares Tendered". Similarly, unless otherwise indicated in the
box entitled "Special Delivery Instructions", please mail the check for the
purchase price of all Shares purchased and all Share Certificates evidencing
Shares not tendered or not purchased (and accompanying documents, as
appropriate) to the address(es) of the registered holder(s) appearing above
under "Description of Shares Tendered". In the event that the boxes entitled
"Special Payment Instructions" and "Special Delivery Instructions" are both
completed, please issue the check for the purchase price of all Shares purchased
and return all Share Certificates evidencing Shares not purchased or not
tendered in the name(s) of, and mail such check and Share Certificates to, the
person(s) so indicated. Unless otherwise indicated herein in the box entitled
"Special Payment Instructions", please credit any Shares tendered hereby and
delivered by book-entry transfer, but which are not purchased by crediting the
account at the Book-Entry Transfer Facility designated above. The undersigned
recognizes that Purchaser has no obligation, pursuant to the Special Payment
Instructions, to transfer any Shares from the name of the registered holder(s)
thereof if Purchaser does not purchase any of the Shares tendered hereby.
<PAGE>
 
<TABLE>
<S>                                         <C>
 
        SPECIAL PAYMENT                     SPECIAL DELIVERY INSTRUCTIONS
INSTRUCTIONS                                (SEE INSTRUCTIONS 1, 5, 6 AND
            (SEE INSTRUCTIONS 1, 5, 6 AND   7)
7)                                          To be completed ONLY if the check for the
To be completed ONLY if the check for the   purchase price of Shares purchased or
purchase price of Shares or Share           Share Certificates evidencing Shares not
Certificates evidencing Shares not          tendered or not purchased are to be mailed
tendered or not purchased are to be issued  to someone other than the undersigned, or
in the name of someone other than the       the undersigned at an address other than
undersigned, or if Shares tendered hereby   that shown under "Description of Shares
and delivered by book-entry transfer which  Tendered".
are not purchased are to be returned by     Mail  / / check  / / Share Certificate(s)
credit to an account at one of the Book-    to:
Entry Transfer Facilities other than that   Name
designated above.                           PLEASE PRINT
Issue  / / check  / / Share Certificate(s)  Address
to:
Name                                        ZIP CODE
                     PLEASE
PRINT                                       (TAXPAYER IDENTIFICATION OR SOCIAL
Address                                     SECURITY NUMBER)
                                            (SEE SUBSTITUTE FORM W-9 ON REVERSE
                                          (ZIP SIDE)
CODE)
    TAXPAYER IDENTIFICATION OR SOCIAL
SECURITY NUMBER
       (SEE SUBSTITUTE FORM W-9 ON REVERSE
SIDE)
/ / Credit Shares delivered by book-entry
    transfer and not purchased to the
    account set forth below:
    Check appropriate box:
    / / DTC             / /
    MSTC             / / PDTC
Account Number:
</TABLE>
<PAGE>
 
<TABLE>
<S>             <C>                                                               <C>
 
                IMPORTANT
                                 STOCKHOLDERS: SIGN HERE
                                   (PLEASE COMPLETE SUBSTITUTE FORM W-9 ON
                 REVERSE)
                                             SIGNATURE(S) OF
                 HOLDER(S)
                 Dated: , 1997
                     (Must be signed by registered holder(s) exactly as name(s)
                 appear(s) on Share Certificates or on a security position
                 listing by a person(s) authorized to become registered
                 holder(s) by certificates and documents transmitted herewith.
                 If signature is by a trustee, executor, administrator,
                 guardian, attorney-in-fact, officer of a corporation or other
                 person acting in a fiduciary or representative capacity, please
                 provide the following information and see Instruction 5.)
                 Name(s):
                                            PLEASE
                 PRINT
                 Capacity (full title)
                 Address:
                                                                         INCLUDE
                 ZIP CODE
                 Area Code and Telephone No:
                 Taxpayer Identification or Social Security No.:
                                      (SEE SUBSTITUTE FORM W-9 ON REVERSE
                 SIDE)
                                GUARANTEE OF SIGNATURE(S)
                               (IF REQUIRED--SEE INSTRUCTIONS 1 AND
                 5)
                         FOR USE BY FINANCIAL INSTITUTIONS ONLY.
                        FINANCIAL INSTITUTIONS: PLACE MEDALLION
                                 GUARANTEE IN SPACE BELOW.
</TABLE>
<PAGE>
                                  INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
    1.  GUARANTEE OF SIGNATURES.  All signatures on this Letter of Transmittal
must be guaranteed by a firm which is a member of the Medallion Signature
Guarantee Program, or by any other "eligible guarantor institution," as such
term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as
amended (each of the foregoing being referred to as an "Eligible Institution"),
unless (i) this Letter of Transmittal is signed by the registered holder(s) of
the Shares (which term, for purposes of this document, shall include any
participant in a Book-Entry Transfer Facility whose name appears on a security
position listing as the owner of Shares) tendered hereby and such holder(s) has
(have) completed neither the box entitled "Special Payment Instructions" nor the
box entitled "Special Delivery Instructions" on the reverse hereof or (ii) such
Shares are tendered for the account of an Eligible Institution. See Instruction
5.
 
    2.  DELIVERY OF LETTER OF TRANSMITTAL AND SHARE CERTIFICATES.  This Letter
of Transmittal is to be used either if Share Certificates are to be forwarded
herewith or if Shares are to be delivered by book-entry transfer pursuant to the
procedure set forth under "THE TENDER OFFER -- Section 3. Procedures for
Accepting the Offer and Tendering Shares" in the Offer to Purchase. Share
Certificates evidencing all physically tendered Shares, or a confirmation of a
book-entry transfer into the Depositary's account at a Book-Entry Transfer
Facility of all Shares delivered by book-entry transfer as well as a properly
completed and duly executed Letter of Transmittal (or facsimile thereof) and any
other documents required by this Letter of Transmittal, must be received by the
Depositary at one of its addresses set forth on the reverse hereof prior to the
Expiration Date (as defined under "THE TENDER OFFER -- Section 1. Terms of the
offer; Expiration Date" in the Offer to Purchase). If Share Certificates are
forwarded to the Depositary in multiple deliveries, a properly completed and
duly executed Letter of Transmittal must accompany each such delivery.
Stockholders whose Share Certificates are not immediately available, who cannot
deliver their Share Certificates and all other required documents to the
Depositary prior to the Expiration Date or who cannot complete the procedure for
delivery by book-entry transfer on a timely basis may tender their Shares
pursuant to the guaranteed delivery procedure described under "THE TENDER OFFER
- -- Section 3. Procedures for Accepting the Offer and Tendering Shares" in the
Offer to Purchase. Pursuant to such procedure: (i) such tender must be made by
or through an Eligible Institution; (ii) a properly completed and duly executed
Notice of Guaranteed Delivery, substantially in the form made available by
Purchaser, must be received by the Depositary prior to the Expiration Date; and
(iii) the Share Certificates evidencing all physically delivered Shares in
proper form for transfer by delivery, or a confirmation of a book-entry transfer
into the Depositary's account at a Book-Entry Transfer Facility of all Shares
delivered by book-entry transfer, in each case together with a Letter of
Transmittal (or a facsimile thereof), properly completed and duly executed, with
any required signature guarantees (or, in the case of a book-entry transfer, an
Agent's Message (as defined under "THE TENDER OFFER--Section 3. Procedures for
Accepting the Offer and Tendering Shares" in the Offer to Purchase)), and any
other documents required by this Letter of Transmittal, must be received by the
Depositary within three NASDAQ trading days after the date of execution of such
Notice of Guaranteed Delivery, all as described under "THE TENDER OFFER --
Section 3. Procedures for Accepting the Offer and Tendering Shares" in the Offer
to Purchase.
 
    The method of delivery of this Letter of Transmittal, Share Certificates and
all other required documents, including delivery through any Book-Entry Transfer
Facility, is at the option and risk of the tendering stockholder, and the
delivery will be deemed made only when actually received by the Depositary. If
delivery is by mail, registered mail with return receipt requested, properly
insured, is recommended. In all cases, sufficient time should be allowed to
ensure timely delivery.
 
    No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. By execution of this Letter of Transmittal
(or a facsimile hereof), all tendering stockholders waive any right to receive
any notice of the acceptance of their Shares for payment.
 
    3.  INADEQUATE SPACE.  If the space provided herein under "Description of
Shares Tendered" is inadequate, the Share Certificate numbers, the number of
Shares evidenced by such Share Certificates and the number of Shares tendered
should be listed on a separate schedule and attached hereto.
<PAGE>
    4.  PARTIAL TENDERS (NOT APPLICABLE TO STOCKHOLDERS WHO TENDER BY BOOK-ENTRY
TRANSFER).  If fewer than all the Shares evidenced by any Share Certificate
delivered to the Depositary herewith are to be tendered hereby, fill in the
number of Shares which are to be tendered in the box entitled "Number of Shares
Tendered". In such cases, new Share Certificate(s) evidencing the remainder of
the Shares that were evidenced by the Share Certificates delivered to the
Depositary herewith will be sent to the person(s) signing this Letter of
Transmittal, unless otherwise provided in the box entitled "Special Delivery
Instructions" on the reverse hereof, as soon as practicable after the expiration
or termination of the Offer. All Shares evidenced by Share Certificates
delivered to the Depositary will be deemed to have been tendered unless
otherwise indicated.
 
    5.  SIGNATURES ON LETTER OF TRANSMITTAL; STOCK POWERS AND ENDORSEMENTS.  If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond with the name(s) as written on
the face of the Share Certificates evidencing such Shares without alteration,
enlargement or any other change whatsoever.
 
    If any Share tendered hereby is owned of record by two or more persons, all
such persons must sign this Letter of Transmittal.
 
    If any of the Shares tendered hereby are registered in the names of
different holders, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of such
Shares.
 
    If this Letter of Transmittal is signed by the registered holder(s) of the
Shares tendered hereby, no endorsements of Share Certificates or separate stock
powers are required, unless payment is to be made to, or Share Certificates
evidencing Shares not tendered or not purchased are to be issued in the name of,
a person other than the registered holder(s), in which case, the Share
Certificate(s) evidencing the Shares tendered hereby must be endorsed or
accompanied by appropriate stock powers, in either case signed exactly as the
name(s) of the registered holder(s) appear(s) on such Share Certificate(s).
Signatures on such Share Certificate(s) and stock powers must be guaranteed by
an Eligible Institution.
 
    If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares tendered hereby, the Share Certificate(s)
evidencing the Shares tendered hereby must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name(s) of the
registered holder(s) appear(s) on such Share Certificate(s). Signatures on such
Share Certificate(s) and stock powers must be guaranteed by an Eligible
Institution.
 
    If this Letter of Transmittal or any Share Certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Purchaser of such person's authority so to act must be
submitted.
 
    6.  STOCK TRANSFER TAXES.  Except as otherwise provided in this Instruction
6, Purchaser will pay all stock transfer taxes with respect to the sale and
transfer of any Shares to it or its order pursuant to the Offer. If, however,
payment of the purchase price of any Shares purchased is to be made to, or Share
Certificate(s) evidencing Shares not tendered or not purchased are to be issued
in the name of, a person other than the registered holder(s), the amount of any
stock transfer taxes (whether imposed on the registered holder(s), such other
person or otherwise) payable on account of the transfer to such other person
will be deducted from the purchase price of such Shares purchased, unless
evidence satisfactory to Purchaser of the payment of such taxes, or exemption
therefrom, is submitted. Except as provided in this Instruction 6, it will not
be necessary for transfer tax stamps to be affixed to the Share Certificates
evidencing the Shares tendered hereby.
<PAGE>
    7.  SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS.  If a check for the purchase
price of any Shares tendered hereby is to be issued, or Share Certificate(s)
evidencing Shares not tendered or not purchased are to be issued, in the name of
a person other than the person(s) signing this Letter of Transmittal or if such
check or any such Share Certificate is to be sent to someone other than the
person(s) signing this Letter of Transmittal or to the person(s) signing this
Letter of Transmittal but at an address other than that shown in the box
entitled "Description of Shares Tendered" on the reverse hereof, the appropriate
boxes on the reverse of this Letter of Transmittal must be completed.
Stockholders delivering Shares tendered hereby by book-entry transfer may
request that Shares not purchased be credited to such account maintained at a
Book-Entry Transfer Facility as such stockholder may designate in the box
entitled "Special Payment Instructions" on the reverse hereof. If no such
instructions are given, all such Shares not purchased will be returned by
crediting the account at the Book-Entry Transfer Facility designated on the
reverse hereof as the account from which such Shares were delivered.
 
    8.  QUESTIONS AND REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Questions
and requests for assistance may be directed to the Information Agent or the
Dealer Manager at their respective addresses or telephone numbers set forth
below. Additional copies of the Offer to Purchase, this Letter of Transmittal
and the Notice of Guaranteed Delivery may be obtained from the Information Agent
or from brokers, dealers, commercial banks or trust companies.
 
    9.  SUBSTITUTE FORM W-9.  Each tendering stockholder is required to provide
the Depositary with a correct Taxpayer Identification Number ("TIN") on the
Substitute Form W-9 which is provided under "Important Tax Information" below,
and to certify, under penalties of perjury, that such number is correct and that
such stockholder is not subject to backup withholding of federal income tax. If
a tendering stockholder has been notified by the Internal Revenue Service that
such stockholder is subject to backup withholding, such stockholder must cross
out item (2) of the Certification box of the Substitute Form W-9, unless such
stockholder has since been notified by the Internal Revenue Service that such
stockholder is no longer subject to backup withholding. Failure to provide the
information on the Substitute Form W-9 may subject the tendering stockholder to
31% federal income tax withholding on the payment of the purchase price of all
Shares purchased from such stockholder. If the tendering stockholder has not
been issued a TIN and has applied for one or intends to apply for one in the
near future, such stockholder should write "Applied For" in the space provided
for the TIN in Part I of the Substitute Form W-9, and sign and date the
Substitute Form W-9. If "Applied For" is written in Part I and the Depositary is
not provided with a TIN within 60 days, the Depositary will withhold 31% on all
payments of the purchase price to such stockholder until a TIN is provided to
the Depositary.
 
    IMPORTANT: THIS LETTER OF TRANSMITTAL (OR FACSIMILE HEREOF), PROPERLY
COMPLETED AND DULY EXECUTED (TOGETHER WITH ANY REQUIRED SIGNATURE GUARANTEES AND
SHARE CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL OTHER REQUIRED
DOCUMENTS) OR A PROPERLY COMPLETED AND DULY EXECUTED NOTICE OF GUARANTEED
DELIVERY MUST BE RECEIVED BY THE DEPOSITARY PRIOR TO THE EXPIRATION DATE (AS
DEFINED IN THE OFFER TO PURCHASE).
 
                           IMPORTANT TAX INFORMATION
 
    Under the federal income tax law, a stockholder whose tendered Shares are
accepted for payment is required by law to provide the Depositary (as payer)
with such stockholder's correct TIN on Substitute Form W-9 below. If such
stockholder is an individual, the TIN is such stockholder's social security
number. If the Depositary is not provided with the correct TIN, the stockholder
may be subject to a $50 penalty imposed by the Internal Revenue Service and
payments that are made to such stockholder with respect to Shares purchased
pursuant to the Offer may be subject to backup withholding of 31%. In addition,
if a stockholder makes a false statement that results in no imposition of backup
withholding, and there was no reasonable basis for such a statement, a $500
penalty may also be imposed by the Internal Revenue Service.
 
    Certain stockholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, such individual must submit a statement, signed under penalties of
perjury, attesting to such individual's exempt status. Forms of such statements
can be obtained from the Depositary. See the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional instructions. A stockholder should consult his or her tax advisor as
to such stockholder's qualification for an exemption from backup withholding and
the procedure for obtaining such exemption.
<PAGE>
    If backup withholding applies, the Depositary is required to withhold 31% of
any payments made to the stockholder. Backup withholding is not an additional
tax. Rather, the tax liability of persons subject to backup withholding will be
reduced by the amount of tax withheld. If withholding results in an overpayment
of taxes, a refund may be obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
    To prevent backup withholding on payments that are made to a stockholder
with respect to Shares purchased pursuant to the Offer, the stockholder is
required to notify the Depositary of such stockholder's correct TIN by
completing the form below certifying that (a) the TIN provided on Substitute
Form W-9 is correct (or that such stockholder is awaiting a TIN) and (b) that
(i) such stockholder has not been notified by the Internal Revenue Service that
such stockholder is subject to backup withholding as a result of a failure to
report all interest or dividends or (ii) the Internal Revenue Service has
notified such stockholder that such stockholder is no longer subject to backup
withholding.
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
    The stockholder is required to give the Depositary the social security
number or employer identification number of the record holder of the Shares
tendered hereby. If the Shares are in more than one name or are not in the name
of the actual owner, consult the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 for additional guidance on
which number to report. If the tendering stockholder has not been issued a TIN
and has applied for a number or intends to apply for a number in the near
future, the stockholder should write "Applied For" in the space provided for the
TIN in Part I, and sign and date the Substitute Form W-9. If "Applied For" is
written in Part I and the Depositary is not provided with a TIN within 60 days,
the Depositary will withhold 31% of all payments of the purchase price to such
stockholder until a TIN is provided to the Depositary.
 
             PAYER'S NAME: CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                         <C>                                <C>
        SUBSTITUTE          PART I--Taxpayer Identification    -----------------------------
         FORM W-9           Number--For all accounts, enter       Social Security Number
                            taxpayer identification number in               OR
                            the box at right. (For most        -----------------------------
                            individuals, this is your social      Taxpayer Identification
                            security number. If you do not                Number
                            have a number, see Obtaining a        (If awaiting TIN write
                            Number in the enclosed                    "Applied For")
                            GUIDELINES.) Certify by signing
                            and dating below. Note: If the
                            account is in more than one name,
                            see the chart in the enclosed
                            GUIDELINES to determine which
                            number to give the payer.
PAYER'S REQUEST FOR         PART II--For Payees Exempt From Backup Withholding, see the
TAXPAYER                    enclosed GUIDELINES and complete as instructed therein.
IDENTIFICATION NUMBER
(TIN)
CERTIFICATION--Under penalties of perjury, I certify that:
 
(1) The number shown on this form is my correct Taxpayer Identification Number (or I am
waiting for a number to be issued to me), and
 
(2) I am not subject to backup withholding either because I have not been notified by the
Internal Revenue Service (the "IRS") that I am subject to backup withholding as a result of
failure to report all interest or dividends, or the IRS has notified me that I am no longer
subject to backup withholding.
 
CERTIFICATE INSTRUCTIONS--You must cross out item (2) above if you have been notified by the
IRS that you are subject to backup withholding because of underreporting interest or
dividends on your tax return. However, if after being notified by the IRS that you were
subject to backup withholding you received another notification from the IRS that you are no
longer subject to backup withholding, do not cross out item (2). (Also see instructions in
the enclosed GUIDELINES.)
 
SIGNATURE ---------------------------------------------------------------    DATE
- ---------------------, 1997
</TABLE>
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER. PLEASE REVIEW
      THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
      NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
<PAGE>
    Facsimiles of the Letter of Transmittal, properly completed and duly signed,
will be accepted. The Letter of Transmittal certificates evidencing Shares and
any other required documents should be sent or delivered by each stockholder or
such stockholder's broker, dealer, commercial bank, trust company or other
nominee to the Depositary at one of its addresses set forth below.
 
                        THE DEPOSITARY FOR THE OFFER IS:
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                                     <C>                          <C>
               BY MAIL:                 BY FACSIMILE TRANSMISSION:       BY HAND/BY OVERNIGHT DELIVERY:
  ChaseMellon Shareholder Services,     (FOR ELIGIBLE INSTITUTIONS     ChaseMellon Shareholder Services,
                L.L.C.                             ONLY)                             L.L.C.
      Reorganization Department               (201) 329-8936               Reorganization Department
             P.O. Box 798                  CONFIRM BY TELEPHONE:                  120 Broadway
           Midtown Station                    (201) 296-4209                       13th Floor
          New York, NY 10018                                                   New York, NY 10271
</TABLE>
 
    Questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of this Offer to Purchase, the Letter of
Transmittal and the Notice of Guaranteed Delivery may be obtained from the
Information Agent. A stockholder may also contact brokers, dealers, commercial
banks or trust companies for assistance concerning the Offer.
 
                    THE INFORMATION AGENT FOR THE OFFER IS:
 
                                     [LOGO]
 
                               Wall Street Plaza
                            New York, New York 10005
 
                        Banks and Brokers Call Collect:
                                 (212) 440-9800
 
                           All Others Call Toll Free:
                                 1-800-223-2064
 
                        THE DEALER MANAGER FOR THE OFFER IS:
                              MORGAN STANLEY & CO.
                                      INCORPORATED
 
                                 1585 Broadway
                            New York, New York 10036
                                 (212) 761-7621
 
January 17, 1997

<PAGE>
MORGAN STANLEY & CO.
INCORPORATED
 
1585 BROADWAY
NEW YORK, NEW YORK 10036
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                                 SYSTEMIX, INC.
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                         NOVARTIS BIOTECH HOLDING CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
                                 NOVARTIS INC.
 
                  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
                     AT 12:00 MIDNIGHT, NEW YORK CITY TIME,
          ON FRIDAY, FEBRUARY 14, 1997, UNLESS THE OFFER IS EXTENDED.
 
                                                                January 17, 1997
 
To Brokers, Dealers, Commercial Banks,
  Trust Companies and Other Nominees:
 
    We have been appointed by Novartis Biotech Holding Corp., a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Novartis
Inc., a company organized under the laws of Switzerland ("Parent"), to act as
Dealer Manager in connection with Purchaser's offer to purchase all outstanding
shares of Common Stock, par value $.01 per share (the "Shares"), of SyStemix,
Inc., a Delaware corporation (the "Company"), at a price of $19.50 per Share,
net to the seller in cash, upon the terms and subject to the conditions set
forth in Purchaser's Offer to Purchase, dated January 17, 1997 (the "Offer to
Purchase"), and the related Letter of Transmittal (which together constitute the
"Offer") enclosed herewith. Please furnish copies of the enclosed materials to
those of your clients for whose accounts you hold Shares registered in your name
or in the name of your nominee.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER (I) NOT LESS
THAN A MAJORITY OF THE ISSUED AND OUTSTANDING SHARES OTHER THAN SHARES OWNED BY
PARENT OR PURCHASER (THE "FIRST MINIMUM CONDITION") AND (II) AT LEAST THE NUMBER
OF SHARES THAT WHEN ADDED TO THE SHARES OWNED BY PARENT AND PURCHASER SHALL
CONSTITUTE 90% OF THE SHARES THEN OUTSTANDING (THE "SECOND MINIMUM CONDITION").
THE FIRST MINIMUM CONDITION MAY NOT BE WAIVED WITHOUT THE CONSENT OF A MAJORITY
OF THE INDEPENDENT DIRECTORS (AS DEFINED IN THE OFFER TO PURCHASE). PURCHASER
HAS AGREED TO WAIVE THE SECOND MINIMUM CONDITION UNDER CERTAIN CIRCUMSTANCES
DESCRIBED IN THE OFFER TO PURCHASE.
 
    Enclosed for your information and use are copies of the following documents:
 
        1.  Offer to Purchase, dated January 17, 1997;
 
        2.  Letter of Transmittal to be used by holders of Shares in accepting
    the Offer and tendering Shares;
 
        3.  Notice of Guaranteed Delivery to be used to accept the Offer if the
    Shares and all other required documents are not immediately available or
    cannot be delivered to ChaseMellon Shareholder Services, L.L.C. (the
    "Depositary") by the Expiration Date (as defined in the Offer to Purchase)
    or if the procedure for book-entry transfer cannot be completed by the
    Expiration Date;
<PAGE>
        4.  A letter to stockholders of the Company from Dr. John J. Schwartz,
    President and Chief Executive Officer of the Company, together with a
    Solicitation/Recommendation Statement on Schedule 14D-9 filed with the
    Securities and Exchange Commission by the Company;
 
        5.  A letter which may be sent to your clients for whose accounts you
    hold Shares registered in your name or in the name of your nominee, with
    space provided for obtaining such clients' instructions with regard to the
    Offer;
 
        6.  Guidelines for Certification of Taxpayer Identification Number on
    Substitute Form W-9; and
 
        7.  Return envelope addressed to the Depositary.
 
    WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE
THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON FRIDAY, FEBRUARY 14, 1997, UNLESS THE OFFER IS EXTENDED.
 
    In all cases, payment for Shares accepted for payment pursuant to the Offer
will be made only after timely receipt by the Depositary of certificates
evidencing such Shares (or a confirmation of a book-entry transfer of such
Shares into the Depositary's account at one of the Book-Entry Transfer
Facilities (as defined in the Offer to Purchase)), a Letter of Transmittal (or
facsimile thereof) properly completed and duly executed and any other required
documents.
 
    If holders of Shares wish to tender, but cannot deliver their certificates
or other required documents, or cannot comply with the procedure for book-entry
transfer, prior to the expiration of the Offer, a tender of Shares may be
effected by following the guaranteed delivery procedure described under "THE
TENDER OFFER -- Section 3. Procedures for Accepting the Offer and Tendering
Shares" in the Offer to Purchase.
 
    Purchaser will not pay any fees or commissions to any broker, dealer or
other person (other than the Dealer Manager, the Depositary and the Information
Agent as described in the Offer) in connection with the solicitation of tenders
of Shares pursuant to the Offer. However, Purchaser will reimburse you for
customary mailing and handling expenses incurred by you in forwarding any of the
enclosed materials to your clients. Purchaser will pay or cause to be paid any
stock transfer taxes payable with respect to the transfer of Shares to it,
except as otherwise provided in Instruction 6 of the Letter of Transmittal.
 
    Any inquiries you may have with respect to the Offer should be addressed to
Morgan Stanley & Co. Incorporated or Georgeson & Company Inc. (the "Information
Agent") at their respective addresses and telephone numbers set forth on the
back cover page of the Offer to Purchase.
 
    Additional copies of the enclosed material may be obtained from the
Information Agent, at the address and telephone number set forth on the back
cover page of the Offer to Purchase.
 
                                          VERY TRULY YOURS,
                                           MORGAN STANLEY & CO.
                                               INCORPORATED
 
    NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU,
OR ANY OTHER PERSON, THE AGENT OF PARENT, PURCHASER, THE COMPANY, THE DEALER
MANAGER, THE INFORMATION AGENT OR THE DEPOSITARY, OR OF ANY AFFILIATE OF ANY OF
THEM, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR TO MAKE ANY
STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE
ENCLOSED DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.

<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                                 SYSTEMIX, INC.
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                         NOVARTIS BIOTECH HOLDING CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
                                 NOVARTIS INC.
 
                  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
                     AT 12:00 MIDNIGHT, NEW YORK CITY TIME,
          ON FRIDAY, FEBRUARY 14, 1997, UNLESS THE OFFER IS EXTENDED.
 
To Our Clients:
 
    Enclosed for your consideration are an Offer to Purchase, dated January 17,
1997 (the "Offer to Purchase"), and a related Letter of Transmittal in
connection with the offer by Novartis Biotech Holding Corp., a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Novartis
Inc., a corporation organized under the laws of Switzerland ("Parent"), to
purchase all outstanding shares of Common Stock, par value $.01 per share (the
"Shares"), of SyStemix, Inc., a Delaware corporation (the "Company"), at a price
of $19.50 per Share, net to the seller in cash, upon the terms and subject to
the conditions set forth in the Offer to Purchase and in the related Letter of
Transmittal (which together constitute the "Offer").
 
    We are (or our nominee is) the holder of record of Shares held by us for
your account. A TENDER OF SUCH SHARES CAN BE MADE ONLY BY US OR OUR NOMINEE AS
THE HOLDER OF RECORD AND PURSUANT TO YOUR INSTRUCTIONS. THE LETTER OF
TRANSMITTAL IS FURNISHED TO YOU FOR YOUR INFORMATION ONLY AND CANNOT BE USED BY
YOU TO TENDER SHARES HELD BY US FOR YOUR ACCOUNT.
 
    We request instructions as to whether you wish to have us tender on your
behalf any or all of the Shares held by us for your account, upon the terms and
subject to the conditions set forth in the Offer.
 
    Your attention is invited to the following:
 
        1. The tender price is $19.50 per Share, net to the seller in cash.
 
        2. The Offer is being made for all outstanding Shares.
 
        3. The Board of Directors of the Company and the Independent Directors
    have determined that each of the Offer and the Merger (as defined in the
    Offer to Purchase) is fair to, and in the best interests of, the
    stockholders of the Company, and recommends that stockholders accept the
    Offer and tender their Shares pursuant to the Offer.
 
        4. The Offer and withdrawal rights will expire at 12:00 Midnight, New
    York City time, on Friday, February 14, 1997, unless the Offer is extended.
<PAGE>
        5. The Offer is conditioned upon, among other things, there being
    validly tendered and not withdrawn prior to the expiration of the Offer (i)
    not less than a majority of the issued and outstanding shares other than
    shares owned by Parent or Purchaser (the "First Minimum Condition") and (ii)
    at least the number of shares that when added to the shares owned by Parent
    and Purchaser shall constitute 90% of the shares then outstanding (the
    "Second Minimum Condition"). The First Minimum Condition may not be waived
    without the consent of a majority of the Independent Directors. Purchaser
    has agreed to waive the Second Minimum Condition under certain circumstances
    described in the Offer to Purchase.
 
        6. Tendering stockholders will not be obligated to pay brokerage fees or
    commissions or, except as otherwise provided in Instruction 6 of the Letter
    of Transmittal, stock transfer taxes with respect to the purchase of Shares
    by Purchaser pursuant to the Offer.
 
    If you wish to have us tender any or all of your Shares, please so instruct
us by completing, executing and returning to us the instruction form contained
in this letter. An envelope in which to return your instructions to us is
enclosed. If you authorize the tender of your Shares, all such Shares will be
tendered unless otherwise specified in your instructions. YOUR INSTRUCTIONS
SHOULD BE FORWARDED TO US IN AMPLE TIME TO PERMIT US TO SUBMIT A TENDER ON YOUR
BEHALF PRIOR TO THE EXPIRATION OF THE OFFER.
 
    The Offer is made solely by the Offer to Purchase and the related Letter of
Transmittal and is being made to all holders of Shares. Purchaser is not aware
of any state where the making of the Offer is prohibited by administrative or
judicial action pursuant to any valid state statute. If Purchaser becomes aware
of any valid state statute prohibiting the making of the Offer or the acceptance
of Shares pursuant thereto, Purchaser will make a good faith effort to comply
with such state statute. If, after such good faith effort, Purchaser cannot
comply with such state statute, the Offer will not be made to (nor will tenders
be accepted from or on behalf of) the holders of Shares in such state. In any
jurisdiction where the securities, blue sky or other laws require the Offer to
be made by a licensed broker or dealer, the Offer shall be deemed to be made on
behalf of Purchaser by Morgan Stanley & Co. Incorporated or one or more
registered brokers or dealers licensed under the laws of such jurisdiction.
 
                                       2
<PAGE>
             INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE FOR
                 CASH ALL OUTSTANDING SHARES OF COMMON STOCK OF
                SYSTEMIX, INC. BY NOVARTIS BIOTECH HOLDING CORP.
 
    The undersigned acknowledge(s) receipt of your letter and the enclosed Offer
to Purchase, dated January 17, 1997, and the related Letter of Transmittal
(which together constitute the "Offer") in connection with the offer by Novartis
Biotech Holding Corp., a Delaware corporation and an indirect wholly owned
subsidiary of Novartis Inc., a corporation organized under the laws of
Switzerland, to purchase all outstanding shares of Common Stock, par value $.01
per share (the "Shares"), of SyStemix, Inc., a Delaware corporation.
 
    This will instruct you to tender the number of Shares indicated below (or,
if no number is indicated below, all Shares) that are held by you for the
account of the undersigned, upon the terms and subject to the conditions set
forth in the Offer.
 
<TABLE>
<S>                                                     <C>
                    DATED:  , 1997                                            SIGN HERE
                   Number of Shares
                   to be Tendered:                                           SIGNATURE(S)
                       Shares*                                       PLEASE TYPE OR PRINT NAME(S)
                                                                     PLEASE TYPE OR PRINT ADDRESS
                                                                    AREA CODE AND TELEPHONE NUMBER
                                                          TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER
</TABLE>
 
- ---------
*Unless otherwise indicated, it will be assumed that all Shares held by us for
    your account are to be tendered.
 
                                       3

<PAGE>
                         NOTICE OF GUARANTEED DELIVERY
                                      FOR
                        TENDER OF SHARES OF COMMON STOCK
                                       OF
                                 SYSTEMIX, INC.
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)
 
    This Notice of Guaranteed Delivery, or one substantially in the form hereof,
must be used to accept the Offer (as defined below) (i) if certificates ("Share
Certificates") evidencing shares of common stock, par value $.01 per share (the
"Common Stock"), of SyStemix, Inc., a Delaware corporation (the "Shares"), are
not immediately available, (ii) if Share Certificates and all other required
documents cannot be delivered to ChaseMellon Shareholders Services, L.L.C., as
Depositary (the "Depositary"), prior to the Expiration Date (as defined in
Section 1 of the Offer to Purchase (as defined below)) or (iii) if the procedure
for delivery by book-entry transfer cannot be completed on a timely basis. This
Notice of Guaranteed Delivery may be delivered by hand or mail or transmitted by
telegram or facsimile transmission to the Depositary. See "THE TENDER OFFER --
Section 3. Procedures for Accepting the Offer and Tendering Shares" in the Offer
to Purchase.
 
                        THE DEPOSITARY FOR THE OFFER IS:
 
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                                    <C>                         <C>
              BY MAIL:                 BY FACSIMILE TRANSMISSION:     BY HAND/BY OVERNIGHT DELIVERY:
  ChaseMellon Shareholder Services,    (FOR ELIGIBLE INSTITUTIONS   ChaseMellon Shareholder Services,
               L.L.C.                            ONLY)                            L.L.C.
      Reorganization Department              (201) 329-8936             Reorganization Department
            P.O. Box 798                 CONFIRM BY TELEPHONE:                 120 Broadway
           Midtown Station                   (201) 296-4209                     13th Floor
         New York, NY 10018                                                 New York, NY 10271
</TABLE>
 
    DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION
OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.
 
    This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an "Eligible Institution"
under the instructions thereto, such signature guarantee must appear in the
applicable space provided in the signature box on the Letter of Transmittal.
<PAGE>
Ladies and Gentlemen:
 
    The undersigned hereby tenders to Novartis Biotech Holding Corp., a Delaware
corporation and an indirect wholly owned subsidiary of Novartis Inc., a
corporation organized under the laws of Switzerland, upon the terms and subject
to the conditions set forth in the Offer to Purchase, dated January 17, 1997
(the "Offer to Purchase"), and the related Letter of Transmittal (which together
constitute the "Offer"), receipt of each of which is hereby acknowledged, the
number of Shares specified below pursuant to the guaranteed delivery procedure
described under "THE TENDER OFFER--Section 3. Procedures for Accepting the Offer
and Tendering Shares" in the Offer to Purchase.
 
<TABLE>
<S>                                                           <C>
Number of Shares:                                             SIGNATURE(S) OF HOLDER(S)
Certificate Nos. (If Available):
 
                                                              Dated:  , 1997
                                                              Name(s) of Holders:
                                                                                  PLEASE TYPE OR PRINT
Check box if Shares will be
delivered by book-entry transfer:
                                                                                        ADDRESS
 
/ / The Depository Trust Company                                                                                  ZIP CODE
/ / Midwest Securities Trust Company
/ / Philadelphia Depository Trust Company                                     AREA CODE AND TELEPHONE NO.
Account No.
</TABLE>
 
<PAGE>
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
     The undersigned, a firm which is a member of the Medillion Signature
 Guarantee Program, guarantees to deliver to the Depositary, at one of its
 addresses set forth above, Share Certificates evidencing the Shares tendered
 hereby, in proper form for transfer, or confirmation of book-entry transfer of
 such Shares into the Depositary's account at The Depository Trust Company, the
 Midwest Securities Trust Company or the Philadelphia Depository Trust Company,
 in each case with delivery of a Letter of Transmittal (or facsimile thereof)
 properly completed and duly executed, and any other required documents, all
 within three National Association of Securities Dealers Automated
 Quotation--National Market System trading days of the date hereof.
 
<TABLE>
<S>                                                          <C>
                       NAME OF FIRM                                             AUTHORIZED SIGNATURE
                          ADDRESS                                                       TITLE
                                                                                        Name:
                                                   ZIP CODE                     PLEASE TYPE OR PRINT
                AREA CODE AND TELEPHONE NO.                                        Dated:  , 1997
</TABLE>
 
                DO NOT SEND SHARE CERTIFICATES WITH THIS NOTICE.
       SHARE CERTIFICATES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.

<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
IRS INSTRUCTIONS
(SECTION REFERENCES ARE TO THE INTERNAL REVENUE CODE.)
 
    PURPOSE OF FORM. -- A person who is required to file an information return
with the Internal Revenue Service (the IRS) must obtain your correct taxpayer
identification number (TIN) to report income paid to you, real estate
transactions, mortgage interest you paid, the acquisition or abandonment of
secured property, or contributions you made to an individual retirement account
(IRA). Use Form W-9 to furnish you correct TIN to the requester (the person
asking you to furnish your TIN), and, when applicable (1) to certify that the
TIN you are furnishing is correct (or that you are waiting for a number to be
issued), (2) to certify that you are not subject to backup withholding, and (3)
to claim exemption form backup withholding if you are an exempt payee.
Furnishing your correct TIN and making the appropriate certifications will
prevent certain payments from being subject to backup withholding.
 
    NOTE: IF A REQUESTER GIVES YOU A FORM OTHER THAN A W-9 TO REQUEST YOUR TIN,
YOU MUST USE THE REQUESTER'S FORM.
 
    HOW TO OBTAIN A TIN. -- If you do not have a TIN, apply for one immediately.
To apply, get FORM SS-5, Application for Social Security Card (SSN) (for
individuals), from your local office of the Social Security Administration, or
FORM SS-4, Application for Employer Identification Number (EIN) (for businesses
and all other entities), from your local IRS office.
 
    To complete Form W-9, if you do not have a TIN and have applied for one or
intend to apply for one in the near future, write "Applied For" in the space for
the TIN in Part I of the substitute Form W-9, sign and date the form, and give
it to the requester. Generally, you will then have 60 days to obtain a TIN and
furnish it to the requester. If the requester does not receive your TIN within
60 days, backup withholding, if applicable, will begin and continue until you
furnish your TIN to the requester. For reportable interest or dividend payments,
the payer must exercise one of the following options concerning backup
withholding during this 60-day period. Under option (1), a payer must backup
withhold on any withdrawals you make from your account after 7 business days
after the requester receives this form back from you. Under option (2), the
payer must backup withhold on any reportable interest or dividend payments made
to your account, regardless of whether you make any withdrawals. The backup
withholding under option (2) must begin no later than 7 business days after the
requester receives this form back. Under option (2), the payer is required to
refund the amounts withheld if your certified TIN is received within the 60-day
period and you were not subject to backup withholding during the period.
 
    NOTE: WRITING "APPLIED FOR" ON THE SUBSTITUTE FORM W-9 MEANS THAT YOU HAVE
ALREADY APPLIED FOR A TIN OR THAT YOU INTEND TO APPLY FOR ONE IN THE NEAR
FUTURE.
 
    As soon as you receive your TIN, complete another Form W-9, include your
TIN, sign and date this form, and give it to the requester.
 
    WHAT IS BACKUP WITHHOLDING? -- Persons making certain payment to you after
1992 are required to withhold and pay to the IRS 31% of such payments under
certain conditions. This is called "backup withholding." Payments that could be
subject to backup withholding include interest, dividends, broker and barter
exchange transactions, rents, royalties, nonemployee compensation, and certain
payments from fishing boat operators, but do not include real estate
transactions.
 
    If you give the requester your correct TIN, make the appropriate
certifications, and report all your taxable interest and dividends on your tax
return, your payments will not be subject to backup withholding. Payments you
receive will be subject to backup withholding if:
 
    (1) You do not furnish your TIN to the requester, or
 
    (2) The IRS notifies the requester that you furnished an incorrect TIN, or
 
    (3) You are notified by the IRS that you are subject to backup withholding
        because you failed to report all your interest and dividends on your tax
        return (for reportable interest and dividends only), or
 
    (4) You fail to certify to the requester that you are not subject to backup
        withholding under (3) above (for reportable interest and dividend
        accounts opened after 1983 only), or
 
    (5) You fail to certify your TIN. This applies only to reportable interest,
        dividend, broker or barter exchange accounts opened after 1983, or
        broker accounts considered inactive in 1983.
 
    Except as explained in (5) above, other reportable payments are subject to
backup withholding only if (1) or (2) above applies. Certain payees and payments
are exempt from backup withholding and information reporting. See PAYEES AND
PAYMENTS EXEMPT FROM BACKUP WITHHOLDING, below, and EXEMPT PAYEES AND PAYMENTS
under SPECIFIC INSTRUCTIONS, on page 2, if you are an exempt payee
 
    PAYEES AND PAYMENTS EXEMPT FROM BACKUP WITHHOLDING -- The following is a
list of payees exempt from backup withholding and for which no information
reporting is required. For interest and dividends, all listed payees are exempt
except item (9). For broker transactions, payees listed in (1) through (13) and
a person registered under the Investment Advisers Act of 1940 who regularly acts
as a broker are exempt. Payments subject to reporting under sections 6041 and
6041A are generally exempt from backup withholding only if made to payees
described in items (1) through (7), except that a corporation that provides
medical and health care services or bills and collects payments for such
services is not exempt from backup withholding or information reporting. Only
payees described in items (2) through (6) are exempt from backup withholding for
barter exchange transactions, patronage dividends, and payments be certain
fishing boat operators.
 
    (1) A corporation.
 
    (2) An organization exempt from tax under Section 501(a), or an IRA, or a
        custodial account under section 403(b)(7).
 
    (3) The United States or any of its agencies or instrumentalities.
 
    (4) A state, the District of Columbia, a possession of the United States, or
        any of their political subdivisions or instrumentalities.
 
    (5) A foreign government or any of the political subdivisions, agencies or
        instrumentalities.
 
    (6) An international organization or any of its agencies or
        instrumentalities.
 
    (7) A foreign central bank of issue.
 
    (8) A dealer in securities or commodities required to register in the U.S.
        or a possession of the U.S.
 
    (9) A futures commission merchant registered with the Commodity Futures
        Trading Commission.
 
    (10) A real estate investment trust.
 
    (11) An entity registered at all times during the tax year under the
        Investment Company Act of 1940.
 
    (12) A common trust fund operated by a bank under section 584(a).
 
    (13) A financial institution.
 
    (14) A middleman known in the investment community as a nominee or listed in
        the most recent publication of the American Society of Corporation
        Secretaries, Inc., Nominee List.
 
    (15) A trust exempt from tax under section 664 or described in section 4947.
 
    Payments of dividends and patronage dividends generally not subject to
backup withholding also include the following:
 
    - Payments to nonresident aliens subject to withholding under section 1441.
 
    - Payments to partnerships not engaged in trade or business in the U.S. and
      that have at least one nonresident partner.
 
    - Payments of patronage dividends not paid in money.
 
    - Payments made by certain foreign organizations.
 
    Payments of interest generally not subject to backup withholding include the
following:
 
    - Payments of interest on obligations issued by individuals
 
    NOTE:  YOU MAY BE SUBJECT TO BACKUP WITHHOLDING IF THIS INTEREST IS $600 OR
MORE AND IS PAID IN THE COURSE OF THE PAYER'S TRADE OR BUSINESS AND YOU HAVE NOT
PROVIDED YOUR CORRECT TIN TO THE PAYER.
 
    - Payments of tax-exempt interest (including exempt-interest dividends under
      section 852).
 
    - Payments described in section 6049(b)(5) to nonresident aliens.
 
    - Payments on tax-free covenant bonds under section 1451.
 
    - Payments made by certain foreign organizations.
 
    - Mortgage interest paid by you.
<PAGE>
    Payments that are not subject to information reporting are also not subject
to backup withholding. For details, see sections 6041, 6041A(a), 6042, 6044,
6045, 6049, 6050A and 6050N, and their regulations.
 
PENALTIES
 
    FAILURE TO FURNISH TIN. -- If you fail to furnish your correct TIN to a
requester, you are subject to a penalty of $50 for each such failure unless your
failure is due to reasonable cause and not to willful neglect.
 
    CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis that results in no backup
withholding, you are subject to a $500 penalty.
 
    CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
    MISUSE OF TINS. -- If the requester discloses or uses TINs in violation of
Federal law, the requester may be subject to civil and criminal penalties.
 
SPECIFIC INSTRUCTIONS
 
    NAME. -- If you are an individual, you must generally provide the name shown
on your social security card. However, if you have changed your last name, for
instance, due to marriage, without informing the Social Security Administration
of the name change, please enter your first name, the last name shown on your
social security card and your new last name.
 
    If you are a sole proprietor, you must furnish your individual name and
either your SSN or EIN. You may also enter your business name. Enter your
name(s) as shown on your social security card and/ or as it was used to apply or
your EIN on Form SS-4.
 
SIGNING THE CERTIFICATION. --
 
    (1) INTEREST, DIVIDEND, AND BARTER EXCHANGE ACCOUNTS OPENED BEFORE 1984 AND
BROKER ACCOUNTS CONSIDERED ACTIVE DURING 1983. -- You are requested to furnish
your correct TIN, but you are not required to sign the certification.
 
    (2) INTEREST, DIVIDEND, BROKER AND BARTER EXCHANGE ACCOUNTS OPENED AFTER
1983 AND BROKER ACCOUNTS CONSIDERED INACTIVE DURING 1983. -- You must sign the
certification or backup withholding will apply. If you are subject to backup
withholding and you are merely providing your correct TIN to the requester, you
must cross out item (2) in the certification before signing the form.
 
    (3) REAL ESTATE TRANSACTIONS. -- You must sign the certification. You may
cross out item (2) of the certification.
 
    (4) OTHER PAYMENTS. -- You are required to furnish your correct TIN, but you
are not required to sign the certification unless you have been notified of an
incorrect TIN. Other payments include payments mad in the course of the
requester's trade or business for rents, royalties, goods (other than bills for
merchandise), medical and health care services, payments to a nonemployee for
services (including attorney and accounting fees), and payments to certain
fishing boat crew members.
 
    (5) MORTGAGE INTEREST PAID BY YOU, ACQUISITION OR ABANDONMENT OF SECURED
PROPERTY, OR IRA CONTRIBUTIONS. -- You are requested to furnish your correct
TIN, but you are not required to sign the certification.
 
    (6) EXEMPT PAYEES AND PAYMENTS. -- If you are exempt from backup
withholding, you should complete this form to avoid possible erroneous backup
withholding. Enter your correct TIN in Part I, write "EXEMPT" in the block in
Part II, and sign and date the form. If you are a nonresident alien or foreign
entity not subject to backup withholding, give the requester a completed Form
W-8. Certificate of Foreign Status.
 
    (7) "AWAITING TIN". -- Following the instructions under HOW TO OBTAIN A TIN,
on page 1, write "Applied For" in the space for the TIN in Part I of the
Substitute Form W-9 and sign and date the form.
 
    SIGNATURE. -- For a joint account, only the person whose TIN is shown in
Part I should sign the form.
 
    PRIVACY ACT NOTICE. -- Section 6109 requires you to furnish your correct TIN
to persons who must file information returns with the IRS to report interest,
dividends, and certain other income paid to you, mortgage interest you paid, the
acquisition or abandonment of secured property, or contributions you made to an
IRA. The IRS uses the numbers for identification purposes and to help verify the
accuracy of your tax return. You must provide your TIN whether or not you are
required to file a tax return. Payers must generally withhold 31% of taxable
interest, dividends, and certain other payments to a payee who does not furnish
a TIN to payer. Certain penalties may also apply.
 
                   WHAT NAME AND NUMBER TO GIVE THE REQUESTER
 
<TABLE>
<C>        <S>                           <C>
- -----------------------------------------------------------------
                                         GIVE THE NAME
                                         AND
                                         SOCIAL SECURITY
                                         NUMBER OF:
FOR THIS TYPE OF ACCOUNT:
- -----------------------------------------------------------------
- -----------------------------------------------------------------
                                         GIVE THE NAME AND
                                         EMPLOYER
                                         IDENTIFICATION
                                         NUMBER OF:
FOR THIS TYPE OF ACCOUNT:
- -----------------------------------------------------------------
 
       1.  Individual                    The individual
       2.  Two or more individuals       The actual owner of the
           (joint account)               account or, if
                                         combined funds, the
                                         first individual on the
                                         account(2)
       3.  Custodian account of a minor  The minor(2)
           (Uniform
           Gift to Minors Act)
       4.  A. The usual revocable        The grantor-trustee(1)
              savings trust (grantor is  The actual owner(1)
              also trustee)
           B. So-called trust account
           that is not a legal or valid
              trust under state law
       5.  Sole proprietorship           The owner(3)
 
       6.  Sole proprietorship           The owner(4)
       7.  A valid trust, estate or      Legal entity(4)
           pension trust
       8.  Corporate                     The corporation
       9.  Association, club,            The organization
           religious, charitable,
           educational, or other tax-
           exempt
           organization
      10.  Partnership                   The partnership
      11.  A broker or registered        The broker or nominee
           nominee
      12.  Account with the Department   The public enemy
           of Agriculture in the name
           of a public entity (such as
           a state or local government,
           school district, or prison)
           that receives agricultural
           program payments
</TABLE>
 
<TABLE>
<C>        <S>                           <C>
- -----------------------------------------------------------------
- -----------------------------------------------------------------
</TABLE>
 
(1) List first and circle the name of the person whose number you furnish.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) Show the individual's name. You may also enter your business name. You may
    use your SSN or EIN.
 
(4) List first and circle the name of the legal trust, estate or pension trust.
    (Do not furnish the TIN of the personal representative or trustee unless the
    legal entity itself is not designated in the account title.)
 
NOTE: IF NO NAME IS CIRCLED WHEN THERE IS MORE THAN ONE NAME, THE NUMBER WILL BE
      CONSIDERED TO BE THAT OF THE FIRST NAME LISTED.
 
                                       2

<PAGE>

This announcement is neither an offer to purchase nor a solicitation of an offer
to sell Shares (as defined below). The Offer (as defined below) is made solely
by the Offer to Purchase dated January 17, 1997 and the related Letter of
Transmittal, and is being made to all holders of Shares. Purchaser (as defined
below) is not aware of any state where the making of the Offer is prohibited by
administrative or judicial action pursuant to any valid state statute. If
Purchaser becomes aware of any valid state statute prohibiting the making of the
Offer or the acceptance of Shares pursuant thereto, Purchaser will make a good
faith effort to comply with such state statute. If, after such good faith
effort, Purchaser cannot comply with such state statute, the Offer will not be
made to (nor will tenders be accepted from or on behalf of) the holders of
Shares in such state. In any jurisdiction where the securities, blue sky or
other laws require the Offer to be made by a licensed broker or dealer, the
Offer shall be deemed to be made on behalf of Purchaser by Morgan Stanley & Co.
Incorporated or one or more registered brokers or dealers licensed under the
laws of such jurisdiction.

Notice of Offer to Purchase for Cash

All Outstanding Shares of Common Stock
of
SyStemix, Inc.
at
$19.50 Net Per Share
by
Novartis Biotech Holding Corp.
an indirect wholly owned subsidiary of
Novartis Inc.

Novartis Biotech Holding Corp., a Delaware corporation ("Purchaser") and an
indirect wholly owned subsidiary of Novartis Inc., a corporation organized under
the laws of Switzerland ("Parent"), is offering to purchase all outstanding
shares (the "Shares") of common stock, par value $.01 per share (the "Common
Stock"), of SyStemix, Inc., a Delaware corporation (the "Company"), at a price
of $19.50 per Share, net to the seller in cash, upon the terms and subject to
the conditions set forth in the Offer to Purchase, dated January 17, 1997 (the
"Offer to Purchase"), and in the related Letter of Transmittal (which together
constitute the "Offer"). Following the Offer, Purchaser intends to effect the
Merger described below.

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
CITY TIME, ON FRIDAY, FEBRUARY 14, 1997, UNLESS THE OFFER IS EXTENDED.

The Offer is conditioned upon, among other things, there being validly tendered
and not withdrawn prior to the expiration of the Offer (i) not less than a
majority of the issued and outstanding Shares other than Shares owned by Parent
or Purchaser (the "First Minimum Condition") and (ii) at least the number of
Shares that when added to the Shares owned by Parent and Purchaser shall
constitute 90% of the Shares then outstanding (the "Second Minimum Condition").
The First Minimum Condition may not be waived without the consent of a majority
of the Independent Directors (as defined 





                                         -1-



<PAGE>

in the Offer to Purchase). Purchaser has agreed to waive the Second Minimum
Condition under certain circumstances described below.

The Offer is being made pursuant to an Agreement and Plan of Merger, dated as of
January 10, 1997 (the "Merger Agreement"), among Parent, Purchaser and the
Company. The Merger Agreement provides that, among other things, as soon as
practicable after the purchase of Shares pursuant to the Offer and the
satisfaction of the other conditions set forth in the Merger Agreement and in
accordance with the relevant provisions of the General Corporation Law of the
State of Delaware ("Delaware Law"), Purchaser will be merged with and into the
Company (the "Merger"). Following consummation of the Merger, the Company will
continue as the surviving corporation (the "Surviving Corporation") and will
become an indirect wholly owned subsidiary of Parent. At the effective time of
the Merger (the "Effective Time"), each Share issued and outstanding immediately
prior to the Effective Time (other than Shares held in the treasury of the
Company or owned by Purchaser, Parent or any direct or indirect wholly owned
subsidiary of Parent or the Company, and other than Shares held by stockholders
who shall have properly demanded and perfected appraisal rights under Section
262 of Delaware Law) will be cancelled and converted automatically into the
right to receive $19.50 in cash, or any higher price that may be paid per Share
pursuant to the Offer, without interest.

The Board of Directors of the Company, by unanimous vote of all directors
present and voting (with all directors who are designees of Parent abstaining),
based upon, among other things, the unanimous recommendation and approval of the
directors of the Company who are not officers or directors of Parent or
Purchaser nor officers or consultants of the Company, has determined that each
of the Offer and the Merger is fair to, and in the best interests of, the
stockholders of the Company (other than Parent and Purchaser), and recommends
that stockholders accept the Offer and tender their Shares pursuant to the
Offer.



For purposes of the Offer, Purchaser will be deemed to have accepted for payment
(and thereby purchased) Shares validly tendered and not properly withdrawn as,
if and when Purchaser gives oral or written notice to ChaseMellon Shareholder
Services, L.L.C. (the "Depositary") of Purchaser s acceptance for payment of
such Shares pursuant to the Offer. Upon the terms and subject to the conditions
of the Offer, payment for Shares accepted for payment pursuant to the Offer will
be made by deposit of the purchase price therefor with the Depositary, which
will act as agent for tendering stockholders for the purpose of receiving
payments from Purchaser and transmitting such payments to tendering stockholders
whose Shares have been accepted for payment. Under no circumstances will
interest on the purchase price for Shares be paid, regardless of any delay in
making such payment. In all cases, payment for Shares tendered and accepted for
payment pursuant to the Offer will be made only after timely receipt by the
Depositary of (i) the certificates evidencing such Shares (the "Share
Certificates") or timely confirmation of a book-entry transfer of such Shares
into the Depositary's account at one of the Book-Entry Transfer Facilities (as
defined in Section 2 under "THE TENDER OFFER" in the Offer to Purchase) pursuant
to 



                                         -2-



<PAGE>

the procedure set forth in Section 3 under "THE TENDER OFFER" in the Offer to
Purchase, (ii) the Letter of Transmittal (or a facsimile thereof), properly
completed and duly executed, with any required signature guarantees or, in the
case of a book-entry transfer, an Agent's Message (as defined in Section 3 under
"THE TENDER OFFER" in the Offer to Purchase) and (iii) any other documents
required under the Letter of Transmittal.

Purchaser expressly reserves the right, in its sole discretion (but subject to
the terms and conditions of the Merger Agreement), at any time and from time to
time, to extend for any reason the period of time during which the Offer is
open, including the occurrence of any condition specified in Section 12 under
"THE TENDER OFFER" in the Offer to Purchase, by giving oral or written notice of
such extension to the Depositary. Any such extension will be followed as
promptly as practicable by public announcement thereof, such announcement to be
made no later than 9:00 a.m., New York City time, on the next business day after
the previously scheduled expiration date of the Offer. During any such
extension, all Shares previously tendered and not withdrawn will remain subject
to the Offer, subject to the rights of a tendering stockholder to withdraw such
stockholder's Shares. Pursuant to the Merger Agreement, in the event all
conditions set forth in the Merger Agreement shall have been satisfied other
than the Second Minimum Condition, Purchaser may extend the Offer for a period
or periods aggregating not more than 20 business days after the later of (i) the
initial expiration date of the Offer and

(ii) the date on which all other conditions set forth in the Merger Agreement
shall have been satisfied, after which time Purchaser shall waive the Second
Minimum Condition.

Tenders of Shares made pursuant to the Offer are irrevocable except that such
Shares may be withdrawn at any time prior to 12:00 Midnight, New York City time,
on Friday, February 14, 1997 (or the latest time and date at which the Offer, if
extended by Purchaser, shall expire) and, unless theretofore accepted for
payment by Purchaser pursuant to the Offer, may also be withdrawn at any time
after March 17, 1997. For the withdrawal to be effective, a written, telegraphic
or facsimile transmission notice of withdrawal must be timely received by the
Depositary at one of its addresses set forth on the back cover page of the Offer
to Purchase. Any such notice of withdrawal must specify the name of the person
who tendered the Shares to be withdrawn, the number of Shares to be withdrawn
and the name of the registered holder of such Shares, if different from that of
the person who tendered such Shares. If Share Certificates evidencing Shares to
be withdrawn have been delivered or otherwise identified to the Depositary,
then, prior to the physical release of such Share Certificates, the serial
numbers shown on such Share Certificates must be submitted to the Depositary and
the signature(s) on the notice of withdrawal must be guaranteed by an Eligible
Institution (as defined in Section 3 under "THE TENDER OFFER" in the Offer to
Purchase), unless such Shares have been tendered for the account of an Eligible
Institution. If Shares have been tendered pursuant to the procedure for
book-entry transfer as set forth in Section 3 under "THE TENDER OFFER" 



                                         -3-



<PAGE>

in the Offer to Purchase, any notice of withdrawal must specify the name and
number of the account at the Book-Entry Transfer Facility to be credited with
the withdrawn Shares. All questions as to the form and validity (including the
time of receipt) of any notice of withdrawal will be determined by Purchaser, in
its sole discretion, whose determination will be final and binding.

The information required to be disclosed by Rule 14d-6(e)(1)(vii) of the General
Rules and Regulations under the Securities Exchange Act of 1934, as amended, is
contained in the Offer to Purchase and is incorporated herein by reference.

The Company has provided Purchaser with the Company's stockholder list and
security position listings for the purpose of disseminating the Offer to holders
of Shares. The Offer to Purchase and the related Letter of Transmittal will be
mailed to record holders of Shares whose names appear on the Company's
stockholder list and will be furnished to brokers, dealers, commercial banks,
trust companies and similar persons whose names, or the names of whose nominees,
appear on the stockholder list or, if applicable, who are listed as participants
in a clearing agency's security position listing for subsequent transmittal to
beneficial owners of Shares.

The Offer to Purchase and the related Letter of Transmittal contain important
information which should be read before any decision is made with respect to the
Offer.

Questions and requests for assistance or for additional copies of the Offer to
Purchase and the related Letter of Transmittal and other tender offer materials
may be directed to the Information Agent or the Dealer Manager as set forth
below, and copies will be furnished promptly at Purchaser's expense. No fees or
commissions will be paid to brokers, dealers or other persons (other than the
Information Agent and the Dealer Manager) for soliciting tenders of Shares
pursuant to the Offer.

The Information Agent for the Offer is:

[Georgeson & Company Inc. Logo]
Wall Street Plaza
New York, New York 10005
Banks and Brokers Call Collect: (212) 440-9800
Call Toll Free: 1-800-223-2064
The Dealer Manager for the Offer is:

MORGAN STANLEY & CO.
  Incorporated
1585 Broadway
New York, New York 10036
(212) 761-7621
January 17, 1997




                            -4-


<PAGE>




Novartis to Acquire Remaining Interest in SyStemix

BASEL, Switzerland, and PALO ALTO, Calif., Jan. 13 /PRNewswire/ -- Novartis and
Systemix Inc announced today that they had entered into a definitive agreement
for Novartis to acquire all the issued and outstanding shares of common stock it
does not already own in SyStemix for USD 19.50 per share in cash. The offer
price represents a 77% premium over the closing price of USD 11.00 per share on
May 23, 1996, the last full trading day prior to Novartis' original offer to
acquire SyStemix for USD 17.00 per share.

The transaction was approved by SyStemix' independent directors as well as by
the board of directors (with the directors designated by Novartis abstaining).

Dr. Daniel Vasella, President and Head of the Executive Committee of Novartis,
commented: "Novartis and SyStemix are engaged in promising discovery activities
in the development of cell and cell based gene therapies for cancer, AIDS,
autoimmune and genetic diseases. With SyStemix fully integrated into Novartis, I
am confident that we will accelerate the pace of our cutting-edge work with
hematopoietic stem-cell technology."

"This is a very positive event for SyStemix," said Dr. John J. Schwartz,
President and CEO of SyStemix. "The outstanding promise of SyStemix' technology
can be realized more broadly and rapidly as part of Novartis."

Novartis currently owns 10,610,099 shares of SyStemix common stock, which, on
October 31, 1996, represented 73.2% of the issued and outstanding shares. Under
the agreement, it will commence a tender offer to acquire the SyStemix shares on
or prior to January 17, 1997. Novartis may not purchase shares in the tender
offer without the consent of the independent directors unless a majority of the
shares Novartis does not already own is validly tendered and not withdrawn in
the tender offer. The tender offer will be subject to other customary
conditions.

All shares not purchased in the tender offer will be converted into the right to
receive USD 19.50 per share in a second-step merger to be consummated as soon as
practicable after the tender offer.

Lehman Brothers Inc. acted as financial advisor to SyStemix. Morgan Stanley &
Co. Incorporated acted as financial advisor to Novartis.

SyStemix, Inc., based in Palo Alto, California, is a biotechnology company
leading in the development of therapies for major disorders of the blood and
immune system based on the use of isolated, expanded and gene-modified human
hematopoietic stem cells.

Headquartered in Basel, Switzerland, Novartis is a world leader in Life Sciences
committed to the research and development of innovative products and services.
In 1995, its annual investment in healthcare research and development was more
than CHF 2 billion, the largest in the healthcare industry. SOURCE SyStemix,
Inc.



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