MILLENNIUM PHARMACEUTICALS INC
8-K/A, 2000-01-06
PHARMACEUTICAL PREPARATIONS
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<PAGE>


                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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


                                    FORM 8-K/A


                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                       Securities and Exchange Act of 1934

Date of Report (Date of earliest event reported): December 22, 1999

                        Millennium Pharmaceuticals, Inc.
- --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)

        Delaware                    0-28494                 04-3177038
- --------------------------------------------------------------------------------
(State or Other Jurisdiction      (Commission             (IRS Employer
    of Incorporation)             File Number)          Identification No.)

75 Sidney Street, Cambridge, Massachusetts                    02139
- --------------------------------------------------------------------------------
(Address of Principal Executive Offices)                    (Zip Code)

(617) 679-7000
- --------------------------------------------------------------------------------
(Registrant's telephone number, including area code)

                                 Not applicable
- --------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)


<PAGE>


ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS

On December 22, 1999 (the "Effective Time"), Millennium Pharmaceuticals Inc., a
Delaware corporation ("Millennium"), completed its acquisition of LeukoSite,
Inc., a Delaware corporation ("LeukoSite"), pursuant to an Agreement and Plan of
Merger, dated as of October 14, 1999 (the "Merger Agreement"), by and among
Millennium, ANM, Inc., a Delaware corporation and a wholly-owned subsidiary of
Millennium ("Transitory Sub") and LeukoSite. Pursuant to the Merger Agreement,
the Transitory Sub merged with and into LeukoSite (the "Merger") at the
Effective Time, whereupon LeukoSite became a wholly-owned subsidiary of
Millennium. Transitory Sub was formed solely for the purpose of effecting the
Merger.

Millennium issued an aggregate of approximately 6,577,110 shares of
Millennium common stock to the former LeukoSite stockholders in the Merger or
approximately 7,600,178 shares assuming that all presently outstanding
LeukoSite stock options, rights and warrants are exercised. Pursuant to the
Merger Agreement, each outstanding share of LeukoSite common stock was
converted into the right to receive .4296 shares of Millennium common stock.
All options to purchase LeukoSite common stock outstanding immediately prior
to the Merger were assumed by Millennium. The Merger is intended to qualify
as a tax-free reorganization under the Internal Revenue Code of 1986, as
amended, and is intended to be accounted for using purchase accounting, with
Millennium being deemed to have acquired LeukoSite.

The foregoing description of the Merger Agreement does not purport to be
complete and is qualified in its entirety by reference to the full text of the
Merger Agreement which is filed as Exhibit 2 to this Current Report on Form 8-K
and incorporated herein by reference.

ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION
         AND EXHIBITS

         (a)      FINANCIAL STATEMENTS OF BUSINESS ACQUIRED.

The required financial statements are attached as Exhibit 99.2.

         (b)      PRO FORMA FINANCIAL INFORMATION.

The required financial statements are attached as Exhibit 99.3.

         (c)      EXHIBITS

         See Exhibit Index attached hereto.


                                      -2-

<PAGE>


                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                  MILLENNIUM PHARMACEUTICALS, INC.

                                  By: /s/ Kevin P. Starr
                                     -----------------------------
                                     Kevin P. Starr
                                     Chief Financial Officer


Date: January 6, 2000


                                      -3-

<PAGE>


                                  EXHIBIT INDEX

<TABLE>
<CAPTION>

EXHIBIT NO.        DESCRIPTION
- -----------        -----------
<S>                <C>
2*                 Agreement and Plan of Merger, dated October 14, 1999,
                   by and among Millennium, Pharmaceuticals, Inc., a
                   Delaware corporation ("Millennium"), ANM, Inc., a
                   Delaware corporation and a wholly-owned subsidiary of
                   Millennium, and LeukoSite, Inc., a Delaware corporation

23.1               Consent of PricewaterhouseCoopers LLP

23.2               Consent of Arthur Andersen LLP

99.1               Press Release issued by Millennium on December 22, 1999

99.2               Financial Statements of LeukoSite

99.3               Unaudited Pro Forma Financial Information of Millennium and
                   LeukoSite.

</TABLE>


- -----------------
*    Incorporated by reference from the Registration Statement on Form S-4 (File
     No. 333-90403) of Millennium.


                                      -4-


<PAGE>
                                                                 Exhibit 23.1


                     CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in the Registration
Statements on Form S-3 (Nos. 333-28239 and 333-90399) and Form S-8 (Nos.
333-15355, 333-15353, 333-29321, 333-15349, 333-15357, 333-29319, 333-84381,
333-84373, 333-84377, 333-93397, and 333-93249) of Millennium
Pharamaceuticals, Inc. of our report dated February 12, 1999 relating to the
financial statements of CytoMed, Inc., which appears in the Current Report on
Form 8-K of Millennium Pharmaceuticals, Inc. dated December 22, 1999.

                                             /s/ PricewaterhouseCoopers LLP

                                             PricewaterhouseCoopers LLP


Boston, Massachusetts
January 4, 2000

<PAGE>
                                                                 Exhibit 23.2


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of
our report dated January 29, 1999 for LeukoSite, Inc. financial statements as
of December 31, 1998 and 1999 and for the three years in the period ended
December 31, 1999 included in this Form 8-K, into Millennium Pharmaceuticals,
Inc. previously filed Registration Statement File Nos. 333-15355, 333-15353,
333-29321, 333-15349, 333-15357, 333-29319, 333-28239, 333-84381, 333-84373,
333-90399, 333-93397, 333-84377 and 333-93249.

                                             /s/ Arthur Andersen LLP

                                             ARTHUR ANDERSEN LLP


Boston, Massachusetts
January 4, 2000






<PAGE>

                                                                    EXHIBIT 99.1

MILLENNIUM ANNOUNCES THE COMPLETION OF LEUKOSITE AND MILLENIUM BIOTHERAPEUTICS
MERGERS

- -- Appoints Christopher Mirabelli, Ph.D., President, Pharmaceutical R&D --

CAMBRIDGE, Mass, December 22, 1999 -- Millennium Pharmaceuticals, Inc. (Nasdaq:
MLNM) today announced the completion of its merger with LukoSite, Inc., in which
Millennium acquired LeukoSite in a stock-for-stock exchange.  As a result of the
merger, LeukoSite shareholders will receive 0.4296 shares of Milllenium stock
for each share of LeukoSite stock.

The merger transaction will be recorded as a purchase for accounting purposes
and will result in a charge to Millennium's fourth quarter 1999 financial
results due to the write-off of acquired in process research and development.

In addition to announcing the LeukoSite merger, Millennium today also
announced the completion of its merger with its Millennium BioTherapeutics,
Inc. subsidary, which had previously been a majority owned subsidary.  This
merger integrates Millennium BioTherapeutics' research and development with
Millennium's pharmaceutical division to form a unified pipeline in small
molecules, therapeutic proteins and antibodies.

In connection with these mergers, Millennium announced the appointment of
Christopher K. Mirabelli, Ph.D. to the position of president, pharmaceutical
research and development, reporting to Mark Levin, CEO of Millennium
Pharmaceuticals.  Dr. Mirabelli, who was president and CEO of LeukoSite prior to
the merger with Millennium, will lead the company's science, technology,
research and development efforts from gene discovery through clinical
evalutaion.

"Our merger with LeukoSite leapfrogs Millennium toward our vision of building
the biopharmaceutical company of the future.  LeukoSite's product development
expertise and rich pipeline of potential products add critical capabitities
and expertise to Millennium's platform," said Mark Levin, Chief Executive
Officer of Millennium.  "Dr. Mirabelli, who has extensive product development
experience, will lead our newly combined pharmaceutical research and
development organization toward achievement of our therapeutic pipeline and
productivity goals," he added.

<PAGE>

Millennium, a leading drug discovery and development company, employs
large-scale genetics, genomics, high throughput screening and informatics in an
integrated science and technology platform.  This innovative drug discovery
platform is applied across the entire healthcare sector, from gene
identification through patient management, to accelerate and transform the
discovery and development of proprietary therapeutic and Diagonomics products
and services.  Headquartered in Cambridge, Massachusetts, Millennium and its
affiliate currently employ more than 1,000 people.


     THIS PRESS RELEASE CONTAINS FORWARD-LOOKING STATEMENTS THAT INVOLVE A
NUMBER OF RISKS AND UNCERTAINITIES.  AMONG THE FACTORS THAT COULD CAUSE
ACTUAL RESULTS TO DIFFER MATERIALLY FROM THOSE INDICATED IN SUCH FORWARD
LOOKING STATEMENTS INCLUDE UNCERTAINTIES RELATING TO GENE IDENTIFICATION,
DRUG DISCOVERY AND CLINICAL DEVELOPMENT PROCESSES; MILLENNIUM'S ABILITY TO
SUCCESSFULLY INTEGRATE THE OPERTIONS OF LEUKOSITE, INC.; CHANGES IN
RELATIONSHIPS WITH STRATEGIC PARTNERS AND DEPENDENCE UPON STRATEGIC FOR THE
PERFORMANCE OF CRITICAL ACTIVITIES UNDER COLLABORATIVE AGREEMENTS; THE IMPACT
OF COMPETITIVE PRODUCTS AND TECHNOLOGICAL CHANGES; UNCERTAINTIES RELATING TO
PATENT PROTECTION AND REGULATORY APPROVAL; AND UNCERTAINTIES RELATING TO THE
ABILITY OF MILLENNIUM AND ITS AFFILIATE TO OBTAIN THE SUBSTANTIAL ADDITIONAL
FUNDS REQUIRED FOR PROGRESS IN DRUG DISCOVERY AND DEVELOPMENT.  THE FACTORS
THAT COULD AFFECT THE PERFORMANCE OF MILLENNIUM ARE MORE FULLY DESCRIBED IN
FILINGS BY MILLENNIUM WITH THE SECURITIES AND EXCHANGE COMMISSION INCLUDING
BUT NOT LIMITED TO THE FACTORS SET FORTH UNDER THE HEADING "BUSINESS FACTORS
THAT MAY AFFECT RESULTS" IN THE ANNUAL REPORT ON FORM 10-K OF MILLENNIUM FOR
THE YEAR ENDED DECEMBER 31, 1998 AS FILED ON MARCH 24, 1999; AND ALSO, THE
FILINGS BY LEUKOSITE, INC. WITH THE SECURITIES AND EXCHANGE COMMISSION.


<PAGE>

                                                                    EXHIBIT 99.2

INDEX TO FINANCIAL STATEMENTS


LEUKOSITE, INC. AND SUBSIDIARY CONDENSED CONSOLIDATED FINANCIAL
STATEMENTS

Condensed Consolidated Balance Sheets as of December 31, 1998 and
September 30, 1999
Condensed Consolidated Statements of Operations for the nine months ended
September 30, 1998 and 1999
Condensed Consolidated Statements of Cash Flows for the nine months ended
September 30, 1998 and 1999
Notes to Condensed Consolidated Financial Statements


CYTOMED, INC. FINANCIAL STATEMENTS

Report of Independent Accountants PricewaterhouseCoopers LLP
Balance Sheet as of December 31, 1998 and 1997
Statement of Operations for the Years Ended December 31, 1998, 1997 and 1996
Statement of Changes in Stockholders' Deficit for the Years Ended
December 31, 1998, 1997 and 1996
Statement of Cash Flows for the Years Ended December 31, 1998, 1997 and 1996
Notes to Financial Statements

<PAGE>

                         LEUKOSITE, INC. AND SUBSIDIARY
                      CONDENSED CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>

                                                             DECEMBER 31, 1998              SEPTEMBER 30, 1999
                                                           ---------------------          ---------------------
                                                                                              (UNAUDITED)
<S>                                                        <C>                            <C>
ASSETS
Current assets:
   Cash and cash equivalents                                        $ 5,361,339                    $ 8,021,059
   Marketable securities                                             15,802,376                     14,359,833
   Receivable from UCB                                                       --                      6,000,000
   Other current assets                                                 544,779                        899,833
                                                           ---------------------          ---------------------
     Total current assets                                            21,708,494                     29,280,725
                                                           ---------------------          ---------------------
Property and equipment, net                                           3,393,873                      4,541,370
Marketable securities                                                 2,168,324                      4,754,040
Goodwill                                                                      -                        208,050
Other assets                                                            231,930                        537,019
                                                           ---------------------          ---------------------
        Total assets                                               $ 27,502,621                   $ 39,321,204
                                                           ---------------------          ---------------------
                                                           ---------------------          ---------------------
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Accounts payable and accrued expenses                            $ 4,387,429                    $ 4,856,305
   Obligation to fund L&I Joint Venture                                 203,445                        826,702
   Deferred revenue                                                   2,172,058                      2,539,560
   Deferred rent                                                        222,907                         40,528
   Current portion of capital lease obligations                         733,848                        958,922
                                                           ---------------------          ---------------------
     Total current liabilities                                        7,719,687                      9,222,017
                                                           ---------------------          ---------------------
Capital lease obligations, less current portion                       1,315,813                        975,297
                                                           ---------------------          ---------------------
Stockholders' equity:
      Preferred stock $.01 par value-
         Authorized-5,000,000 shares
         Issued and outstanding-no shares                                    --                             --
      Common stock, $.01 par value-
         Authorized-25,000,000 shares
         Issued and outstanding-11,916,339 shares at
           December 31, 1998 and 14,670,121 shares at
           September 30, 1999                                           119,164                        146,693
      Additional paid-in capital                                     65,280,443                     97,594,072
      Accumulated deficit                                           (46,932,486)                   (68,616,875)
                                                           ---------------------          ---------------------
        Total stockholders' equity                                   18,467,121                     29,123,890
                                                           ---------------------          ---------------------
        Total liabilities and stockholders' equity                 $ 27,502,621                   $ 39,321,204
                                                           ---------------------          ---------------------
                                                           ---------------------          ---------------------
</TABLE>

<PAGE>

                         LEUKOSITE, INC. AND SUBSIDIARY
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                          NINE MONTHS ENDED SEPTEMBER 30,
                                                          ------------------------------
                                                             1998                1999
                                                             ----                ----
       <S>                                               <C>                <C>
       REVENUES:
       Corporate collaborations                           $ 5,659,083         $ 7,599,320
       Joint venture                                          820,503           2,661,606
       Government grants                                      590,577             668,144
                                                         ---------------    --------------
       Total revenue                                        7,070,163          10,929,070
                                                         ---------------    ---------------

       OPERATING EXPENSES:
       Research and development                            14,997,469          22,806,874
       General and administrative                           1,872,147           2,567,407
       Acquired in-process research and
            development                                            --           4,249,157
                                                         ---------------    ---------------

       Total operating expenses                            16,869,616          29,623,438
                                                         ---------------    ---------------

       LOSS FROM OPERATIONS                                (9,799,453)        (18,694,368)

       OTHER INCOME (EXPENSE):
           Equity in operations of
             joint venture                                 (2,922,256)         (3,899,863)
           Interest income                                  1,039,935           1,040,391
           Interest expense                                 ( 113,749)          ( 130,549)
                                                         ---------------    ---------------

       NET LOSS                                         $ (11,795,523)      $ (21,684,389)
                                                         ---------------    ---------------
                                                         ---------------    ---------------
       NET LOSS PER COMMON SHARE
            Basic and diluted                                  $(1.12)             $(1.69)
                                                         ---------------    ---------------
                                                         ---------------    ---------------
       SHARES USED IN COMPUTING NET LOSS PER
       COMMON SHARE
            Basic and diluted                              10,554,312          12,859,521
                                                         ---------------    ---------------
                                                         ---------------    ---------------
</TABLE>


<PAGE>

                         LEUKOSITE, INC. AND SUBSIDIARY
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)

<TABLE>
<CAPTION>

                                                                    NINE MONTHS ENDED SEPTEMBER 30,
                                                                   --------------------------------
                                                                       1998              1999
                                                                       ----              ----
<S>                                                                 <C>              <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                                            $(11,795,523)    $(21,684,389)
Adjustments to reconcile net loss to net
 cash used in operating activities:
  Depreciation and amortization                                          863,304        1,177,605
  Stock compensation expense                                                  -           152,488
  Equity in operations of joint venture                                2,922,256        3,899,863
  Acquired in-process research and
    development                                                               -         4,249,157
  Change in operating assets and liabilities:
    Other current assets                                                (465,912)         199,413
    Accounts payable and accrued expenses                              1,591,296       (1,549,743)
    Deferred revenue                                                   1,439,981         (338,143)
    Deferred rent                                                       (182,378)        (182,379)
                                                                    -------------    -------------
     Net cash used in operating activities                            (5,626,976)     (14,076,128)
                                                                    -------------    -------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Investment in marketable securities                                (17,234,631)     (10,247,199)
  Proceeds from maturities of marketable securities                   12,504,902       16,478,862
  Investment in joint venture                                         (3,172,068)      (3,276,606)
  Purchases of property and equipment                                 (1,109,437)      (1,241,782)
  Cash acquired in CytoMed acquisition                                        -           564,875
  Cash acquired in ProScript acquisition                                      -           104,194
  Decrease (increase) in other assets                                      1,217          244,584
                                                                    -------------    -------------
      Net cash provided by (used in)  investing activities            (9,010,017)       2,626,928
                                                                    -------------    -------------
CASH FLOWS FROM FINANCING ACTIVITIES:
 Principal payments on capital leases                                   (752,280)        (632,447)
 Issuance of common stock                                             11,731,366       14,382,873
 Exercise of stock options                                               234,283          358,494
                                                                    -------------    -------------
     Net cash used in financing activities                            11,213,369       14,108,920
                                                                    -------------    -------------
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS                       (3,423,624)       2,659,720

CASH AND EQUIVALENTS, BEGINNING OF PERIOD                             10,587,873        5,361,339
                                                                    -------------    -------------
CASH AND EQUIVALENTS, END OF PERIOD                                 $  7,164,249     $  8,021,059
                                                                    -------------    -------------
                                                                    -------------    -------------
SUPPLEMENTAL CASH FLOW INFORMATION:
     Cash paid during the period for interest                       $    113,749     $    130,549
                                                                    -------------    -------------
                                                                    -------------    -------------
     Property and equipment purchased under capital lease
          obligations                                               $    346,771     $    320,433
                                                                    -------------    -------------
                                                                    -------------    -------------
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING
ACTIVITIES:
     Acquisition of CytoMed:
           Marketable securities                                    $         -      $   7,374,386
           Accounts receivable                                                -          6,355,681
           Prepaid expenses                                                   -            181,441
           Property and equipment                                             -            104,452
           Other assets                                                       -              5,000
           Acquired in-process research and development                       -          1,588,612
           Accounts payable and accrued expenses                              -           (547,178)
           Stock issued                                                       -        (15,627,269)
                                                                    -------------    -------------
                                                                    $         -      $    (564,875)
                                                                    -------------    -------------
</TABLE>

<PAGE>
<TABLE>

     <S>                                                            <C>              <C>
     Acquisition of ProScript:
           Prepaid expenses                                         $         -      $      62,516
           Property and equipment                                             -            650,752
           Goodwill                                                           -            219,000
           Other assets                                                       -            499,502
           Acquired in-process research and development                       -          2,660,545
           Accounts payable and accrued expenses                              -           (959,722)
           Deferred revenue                                                   -           (705,645)
           Capital lease obligations                                          -           (196,114)
           Stock issued                                                       -         (2,335,028)
                                                                    -------------    -------------
                                                                    $         -      $    (104,194)
                                                                    -------------    -------------
                                                                    -------------    -------------
</TABLE>

<PAGE>

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1.  Operations and Basis of Presentation

    LeukoSite, Inc. (the "Company") was incorporated on May 1, 1992. The Company
    is a biotechnology company developing proprietary monoclonal antibody and
    small molecule drugs to treat patients with cancer and inflammatory,
    autoimmune and viral diseases.

    The accompanying unaudited condensed consolidated financial statements have
    been prepared by the Company pursuant to the rules and regulations of the
    Securities and Exchange Commission and include, in the opinion of
    management, all adjustments, consisting of normal, recurring adjustments,
    necessary for a fair presentation of interim period results. Certain
    information and footnote disclosures normally included in financial
    statements prepared in accordance with generally accepted accounting
    principles have been condensed or omitted pursuant to such rules and
    regulations. The Company believes, however, that its disclosures are
    adequate to make the information presented not misleading. The results for
    the interim periods presented are not necessarily indicative of results to
    be expected for the full fiscal year. These condensed consolidated
    financial statements should be read in conjunction with the audited
    consolidated financial statements and notes related thereto included in
    the Company's Annual Report on Form 10-K for the year ended
    December 31, 1998 filed with the Securities and Exchange Commission.


2.  Summary of Significant Accounting Policies

    (a) Cash Equivalents and Marketable Securities

    Cash equivalents are highly liquid investments with original maturities of
    less than three months. Marketable securities consist of securities with
    original maturities of greater than three months. The Company accounts for
    cash equivalents and marketable securities in accordance with SFAS No. 115
    "Accounting for Certain Investments in Debt and Equity Securities." In
    accordance with SFAS No. 115, the Company has classified its investments as
    held-to-maturity. The investments that the Company has the positive intent
    and ability to hold to maturity are reported at amortized cost, which
    approximates fair market value.

    As of September 30, 1999 there were no material unrealized gains or losses
    on any investments. Cash and cash equivalents and marketable securities
    consisted of the following:

<TABLE>
<CAPTION>

                                                                    December 31, 1998     September 30, 1999

              <S>                                                   <C>                     <C>
              Cash and cash equivalents:
                   Cash                                             $   3,219,315               $ 598,441
                   Money market funds                                   1,341,651               5,960,270
                   Commercial Paper                                             -               1,462,348
                   Taxable auction securities                             800,373                       -
                                                                      -----------             -----------
                                                                    $   5,361,339           $   8,021,059
                                                                      -----------             -----------
                                                                      -----------             -----------
              Marketable securities, short term:
                   Corporate bonds and notes (average
                      maturity of 6 and 5 months                     $ 15,802,376            $ 14,359,833
                      respectively)
                                                                      -----------             -----------
                                                                      -----------             -----------
              Marketable securities, long term:
                   Corporate bonds and notes (average
                      maturity of 16 and 16 months
                      respectively)                                   $ 2,168,324              $4,754,040
                                                                      -----------             -----------
                                                                      -----------             -----------
</TABLE>


<PAGE>

    (b) Net Loss per Common Share

     Basic net loss per common share is based on the weighted average number of
    common shares outstanding. For the three and six month periods ended
    September 30, 1998 and 1999 diluted net loss per common share is the same as
    basic net loss per common share as the inclusion of 340,699, 1,010,483,
    386,943, and 715,197 weighted average shares of common stock issuable upon
    exercise of stock options and warrants would be antidilutive for the three
    months ended September 30, 1998 and 1999 and nine months ended September
    30, 1998 and 1999 respectively.

3.  ILEX Joint Venture

    In May 1997 the Company and ILEX Oncology, Inc. (ILEX) entered into a joint
    venture agreement that established L&I Partners, LP ("L&I") for the purpose
    of developing CAMPATH(R). Under the terms of the partnership, the Company is
    required to fund 50% of the partnership's working capital requirements. The
    joint venture expires in 2017. Should either party fail to fulfill its
    funding obligations, control of the joint venture may change.

    The Company accounts for its investment in the joint venture under the
    equity method of accounting and records its share of the income or loss in
    other income (expense). The Company is reimbursed by the joint venture for
    certain costs incurred on behalf of the joint venture and has included such
    reimbursements in revenues. The joint venture has sublicensed the rights to
    CAMPATH(R) from the Company. For the nine months ended September 30, 1999
    the joint venture's recorded loss was $7,799,726. For the nine months ended
    September 30, 1999 the Company's share of the joint venture's recorded loss
    was $3,899,863 and the Company's obligation to fund the joint venture as of
    September 30, 1999 was $826,702. The Company charged the joint venture
    $2,661,606 for costs incurred on its behalf for the nine months ended
    September 30, 1999.

4.  Acquisitions

     (a) CytoMed, Inc.

     In February 11, 1999 the Company acquired all of the issued and outstanding
     capital stock of CytoMed, Inc. ("CytoMed") through the issuance of 935,625
     shares of the Company's Series A Convertible Preferred Stock, par value
     $.01 per share, to CytoMed shareholders. The Series A Convertible Preferred
     Stock automatically converted into common stock on a one-for-one basis upon
     the required approval by the Company's shareholders at the annual meeting
     held May 25, 1999. The Company may issue another 631,313 common shares to
     CytoMed shareholders upon receipt of a $6,000,000 payment to CytoMed from
     UCB Pharma. In addition, CytoMed shareholders may receive up to
     $23,000,000 in cash and up to an additional 84,000 shares of the Company's
     common shares upon the achievement of milestones related to certain
     CytoMed product candidates.

     The merger was accounted for as a purchase in accordance with the
     requirements of Accounting Principles Board (APB) Opinion No.16, Business
     Combinations, and accordingly CytoMed's results of operations are included
     in those of the Company beginning on the date of the acquisition. The total
     purchase price, including transaction costs, was approximately $16,100,000.
     The total purchase price was allocated to the fair value of the assets
     acquired and liabilities assumed including an allocation to in-process
     research and development of $1,588,612. The nature of the efforts to
     develop the purchased in-process technologies into commercially viable
     products principally relate to the completion of all development, testing,
     and high-volume

<PAGE>

      manufacturing activities that are necessary to establish that the
      products can be produced to meet its design specifications and are
      proven to be safe and effective for their respective indications. As of
      the acquisition date, technological feasibility of the compounds in
      development had not been established and the technologies have no
      alternative future uses. If these projects are not successfully
      developed, the Company will not realize the value assigned to the
      in-process research and development, therefore the value of the
      in-process research and development was charged to operations in the
      current period.

     Total consideration allocated to the fair market value of assets acquired
     and liabilities assumed on the purchase date is as follows:

<TABLE>
<CAPTION>
                       <S>                                                      <C>
                       Cash and cash equivalents                                $ 1,044,875
                       Marketable securities                                      7,374,386
                       Accounts receivable                                        6,355,681
                       Prepaid expenses                                             181,441
                       Property and equipment                                       104,452
                       Other assets                                                   5,000
                       Acquired in-process research and development               1,588,612
                       Accounts payable and accrued expenses                       (547,178)
                                                                            ---------------
                                                                               $ 16,107,269
                                                                            ---------------
                                                                            ---------------
</TABLE>

       The following unaudited pro forma condensed consolidated statement of
       operations information has been prepared to give effect to the merger as
       if such transaction had occurred at the beginning of the periods
       presented. In October 1998 CytoMed sold to UCB Pharma assets relating to
       certain research programs. CytoMed's historical results of operations
       included in the following pro forma information have been adjusted to
       reflect the revenues and expenses related to the remaining research
       programs acquired by the Company. The historical results of operations
       have been adjusted to reflect (i) elimination of the one-time charge to
       operations for the purchase of acquired in-process research and
       development and (ii) reduction of interest income resulting from use of
       $480,000 for transaction costs at an annual interest rate of 5.47%.


<TABLE>
<CAPTION>


                                                           YEAR ENDED          NINE MONTHS ENDED
                                                        DECEMBER 31, 1998     SEPTEMBER 30, 1999
                                                        -----------------     -------------------

         <S>                                                  <C>                   <C>
         REVENUES                                             $ 13,584,460           $ 10,929,070
         NET LOSS                                             $(17,334,735)         $ (20,859,815)

         NET LOSS PER COMMON SHARE
              Basic and diluted                                     $(1.39)                $(1.49)
                                                              -------------         --------------
                                                              -------------         --------------

         SHARES USED IN COMPUTING NET LOSS PER
         COMMON SHARE
              Basic and diluted                                  12,462,349             13,987,778
                                                              -------------         --------------
                                                              -------------         --------------
</TABLE>

        (b) ProScript, Inc.

        On July 19, 1999 the Company acquired all of the issued and outstanding
        capital stock of ProScript, Inc. ("ProScript") by payment of $411,719 in
        cash to ProScript shareholders and through the issuance of 187,970
        shares of the Company's common stock, par value $0.01 per share, to
        certain ProScript shareholders. In addition, ProScript shareholders are
        entitled to

<PAGE>

        additional cash payments upon the achievement of certain milestones and
        royalties related to certain ProScript compounds and related to a
        ProScript research collaboration with Hoechst Marion Roussel, Inc.

        The merger was accounted for as a purchase in accordance with the
        requirements of APB Opinion No. 16, Business Combinations, and
        accordingly ProScript's results of operations have been included in
        those of the Company beginning on the date of the acquisition. The total
        purchase price was approximately $2,800,000. The total purchase price
        was allocated to the fair value of assets acquired and liabilities
        assumed including an allocation to in-process research and development
        of $2,660,545. The nature of the efforts to develop the purchased
        in-process technologies into commercially viable products principally
        relate to the completion of all development, testing, and high-volume
        manufacturing activities that are necessary to establish that the
        products can be produced to meet its design specifications and are
        proven to be safe and effective for their respective indications. As of
        the acquisition date, technological feasibility of the compounds in
        development had not been established and the technologies have no
        alternative future uses. If these projects are not successfully
        developed, the Company will not realize the value assigned to the
        in-process research and development, therefore the value of the
        in-process research and development was charged to operations in the
        current period. In addition, the Company has recorded $219,000 of
        goodwill which will be amortized over five years.

<TABLE>
<CAPTION>
                      <S>                                                      <C>
                      Acquisition of ProScript:
                        Cash and cash equivalents                              $  615,914
                        Prepaid expenses                                           62,516
                        Property and equipment                                    650,752
                        Goodwill                                                  219,000
                        Other assets                                              499,502
                        Acquired in-process research and development            2,660,545
                        Accounts payable and accrued expenses                    (959,722)
                        Deferred revenue                                         (705,645)
                        Capital lease obligations                                (196,114)
                                                                               -----------
                                                                               $2,846,748
                                                                               -----------
                                                                               -----------
</TABLE>


5.  Private Placement

    On July 20, 1999 the Company completed a private placement of 1,487,548
    shares of its common stock for total net proceeds of $14.2 million after
    expenses of the offering. LeukoSite will register these shares and use its
    best efforts to keep the registration statement effective for two years, or
    until all shares are sold under the registration statement, whichever
    comes first.


6.  Schering AG Agreement

    In August 1999 the Company and ILEX, through L&I, and Schering AG entered
    into a distribution and development agreement which grants Schering AG
    exclusive marketing and distribution rights to CAMPATH(R) in the U.S.,
    Europe and rest of the world except Japan and East Asia, where the Company
    and ILEX have retained rights.

    In the United States, Berlex Laboratories, Inc., Schering's U.S. affiliate,
    the Company and ILEX will share in the profits from the sale of CAMPATH(R).
    On sales made in the rest of the territory, Schering AG will pay royalties
    equivalent to the rate of profit sharing expected in the U.S. Under

<PAGE>

    the terms of the agreement, Schering will make payments of up to $30 million
    for rights to CAMPATH(R) upon the achievement of certain regulatory
    milestones. The Company and ILEX currently intend to use these funds to pay
    for ongoing development activity.

    As of September 30, 1999 L&I has received $5 million in funding and this
    amount is included in the joint venture's total liabilities.

7.  Subsequent Events

    On October 14, 1999 Millennium Pharmaceuticals, Inc. ("Millennium") and
    the Company announced the signing of a merger agreement pursuant to
    which Millennium would acquire the Company in a stock for stock
    exchange. If this transaction closes, the Company expects that
    Millennium will issue approximately 6,577,110 shares of common
    stock to the Company's stockholders, and options, rights and warrants to
    purchase approximately 1,023,068 shares of Millennium common
    stock to the holders of the Company's options, rights and warrants.
    The transaction is subject to, among other things, the approval of the
    Company's stockholders as well as antitrust clearance under the
    Hart-Scott-Rodino Antitrust Improvements Act.


<PAGE>

                        REPORT OF INDEPENDENT ACCOUNTANTS


To the Board of Directors and Stockholders of
CytoMed, Inc.

In our opinion, the accompanying balance sheet and the related statements of
operations, of changes in stockholders' deficit and of cash flows present
fairly, in all material respects, the financial position of CytoMed, Inc.
(the "Company") at December 31, 1998 and 1997, and the results of its
operations and its cash flows for each of the three years in the period ended
December 31, 1998, in conformity with generally accepted accounting
principles. 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 of these
statements in accordance with generally accepted auditing standards which
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, assessing the accounting
principles used and significant estimates made by management, and evaluating
the overall financial statement presentation. We believe that our audits
provide a reasonable basis for the opinion expressed above.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Boston, Massachusetts
February 12, 1999


<PAGE>


                                     CYTOMED INC.
                                    BALANCE SHEET

<TABLE>
<CAPTION>
                                                                                               DECEMBER 31,
                                                                                         ------------------------
<S>                                                                                      <C>          <C>
                                                                                            1998         1997
ASSETS
Current assets:
  Cash and cash equivalents                                                              $ 5,394,234  $   955,643
  Marketable securities                                                                    4,143,940    7,728,214
  Other receivables                                                                        6,155,681           --
  Other current assets                                                                       319,871      130,319
                                                                                         -----------  -----------
      Total current assets                                                               $16,013,726    8,814,176

Fixed assets, net                                                                            105,295      541,206
Other assets                                                                                   5,000       37,600
                                                                                         -----------  -----------
                                                                                         $16,124,021  $ 9,392,982
                                                                                         -----------  -----------
                                                                                         -----------  -----------
LIABILITIES, REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT
Current liabilities:
  Current portion of capital lease obligations                                           $        --  $   112,547
  Accounts payable                                                                           274,406      799,315
  Accrued expenses                                                                           586,612      551,253
                                                                                         -----------  -----------
      Total current liabilities                                                              861,018    1,463,115
                                                                                         -----------  -----------
Capital lease obligations                                                                         --       28,475
                                                                                         -----------  -----------
Redeemable preferred stock:
  Convertible preferred stock, $.01 par value, 24,335,060 shares authorized:
      Series VII redeemable convertible preferred stock, 17,497,594 and 15,662,732
       shares issued and outstanding at December 31, 1998 and 1997, respectively,
       stated at net issuance price plus accretion (liquidation preference
       $20,625,599)                                                                       19,689,845   16,162,471
      Series I redeemable convertible preferred stock, 184,670 shares issued and
       outstanding, stated at redemption value (liquidation preference $609,411)             609,411      609,411
      Series II redeemable convertible preferred stock, 400,000 shares issued and
       outstanding, stated at net issuance price plus accretion (liquidation
       preference $1,320,000)                                                              1,275,145    1,254,649
      Series III redeemable convertible preferred stock, 4,967,373 shares issued and
       outstanding, stated at net issuance price plus accretion (liquidation
       preference $19,396,436)                                                            19,277,444   18,029,915
      Series VI redeemable convertible preferred stock, 1,029,392 shares issued and
       outstanding, stated at net issuance price plus accretion (liquidation
       preference $3,396,994)                                                              3,180,732    3,143,116
                                                                                         -----------  -----------
      Total redeemable preferred stock                                                    44,032,577   39,199,562
                                                                                         -----------  -----------
Stockholders' deficit:
  Series V convertible preferred stock, 185,714 shares issued and outstanding, stated
    at issuance price (liquidation preference $1,429,998)                                  1,299,998    1,299,998
  Common stock, $0.1 par value; 29,025,945 and 28,966,312 shares authorized, 15,578 and
    13,391 shares issued and 15,033 and 12,846 shares outstanding at December 31, 1998
    and 1997, respectively                                                                       156          134
  Additional paid-in capital                                                              18,186,760   17,856,790
  Accumulated deficit                                                                    (48,244,860) (50,443,464)
                                                                                         -----------  -----------
                                                                                         (28,757,946) (31,286,452)
  Less - Cost of 545 shares of common stock held in treasury                                 (11,628)     (11,628)
                                                                                         -----------  -----------
      Total stockholders' deficit                                                        (28,769,574) (31,298,170)
                                                                                         -----------  -----------
Commitments (Note 12)                                                                             --           --
                                                                                         -----------  -----------
                                                                                         $16,124,021  $ 9,392,982
                                                                                         -----------  -----------
                                                                                         -----------  -----------
</TABLE>

   The accompanying notes are an integral part of these financial statements.

<PAGE>

                                 CYTOMED, INC.
                            STATEMENT OF OPERATIONS
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             YEAR ENDED DECEMBER 31,
                                                      1998              1997            1996
<S>                                               <C>               <C>             <C>
Revenue                                           $  3,385,205      $    527,725    $  1,038,087
                                                  ------------      ------------    ------------

Costs and expenses:
   Research and development                          6,987,846         7,108,158       5,616,233
   General and administrative                        2,457,051         2,336,136       1,980,634
                                                  ------------      ------------    ------------

                                                     9,444,897         9,444,294       7,596,867
                                                  ------------      ------------    ------------

      Loss from operations                          (6,059,692)       (8,916,569)     (6,558,780)
                                                  ------------      ------------    ------------
Other income (expense):
   Interest expense                                     (8,350)         (866,982)        (40,124)
   Interest income                                     447,974            24,756          73,231
   Other income                                              -           250,000               -
   Gain on sale of assets                           10,798,451                 -               -
                                                  ------------      ------------    ------------

                                                    11,238,075          (592,226)         33,107
                                                  ------------      ------------    ------------
      Net income (loss)                              5,178,383        (9,508,795)     (6,525,673)

Preferred stock preferences (Note 9)
   Accrued dividends on Series III and
    Series VII convertible preferred stock          (2,685,522)       (1,252,040)     (1,192,170)
   Accretion of stock issuance costs                  (294,257)         (119,130)        (92,760)
                                                  ------------      ------------    ------------

      Net income (loss) available to common
       stockholders                               $  2,198,604      $(10,879,965)   $ (7,810,603)
                                                  ------------      ------------    ------------
                                                  ------------      ------------    ------------

</TABLE>




   The accompanying notes are an integral part of these financial statements.

<PAGE>

                                CytoMed, Inc.
                Statement of Changes in Stockholders' Deficit
                 For the Three Years Ended December 31, 1998

<TABLE>
<CAPTION>
                                Series V convertible                    Additional
                                  preferred stock      Common stock       paid-in     Accumulated   Treasury stock
                                 Shares    Amount     Shares  Par value   capital       deficit     Shares   Amount      Total
                                -------  ----------   ------  ---------  -----------  ------------  ------- --------  ------------
<S>                             <C>      <C>          <C>     <C>        <C>         <C>            <C>     <C>       <C>
Balance at December 31, 1995         --  $       --    2,984   $    30   $15,904,757  $(31,752,896)     545 $(11,628) $(15,859,737)

Issuance of Series V
 convertible preferred stock... 185,714   1,299,998                                                                      1,299,998
Issuance of warrants to
 purchase Series VI convertible
 preferred stock...............                                                7,546                                         7,546
Accrued dividend on Series III
 convertible preferred stock...                                                         (1,192,170)                     (1,192,170)
Accretion of redeemable
 preferred stock to
 redemption value..............                                                            (92,760)                        (92,760)
Issuance of warrants to
 purchase common stock.........                                              137,000                                       137,000
Net loss.......................                                                         (6,525,673)                     (6,525,673)
                                -------  ----------   ------  ---------  -----------  ------------  ------- --------  ------------
Balance at December 31, 1996... 185,714   1,299,998    2,984         30   16,049,303   (39,563,499)     545  (11,628)  (22,225,796)

Issuance of warrants to
 purchase common stock as
 payment of issuance costs
 on Series VII convertible
 preferred stock...............                                              172,000                                       172,000
Issuance of common stock
 pursuant to stock option
 exercises.....................                       10,407        104        4,579                                         4,683
Acquisition and retirement of
 Series IV convertible
 preferred stock...............                                            1,250,012                                     1,250,012
Accrued dividend on Series III
 and Series VII convertible
 preferred stock...............                                                         (1,252,040)                     (1,252,040)
Issuance of warrants to
 purchase common stock and
 Series VII convertible
 preferred stock...............                                              367,590                                       367,590
Compensation related to the
 grant of common stock
 options.......................                                               13,306                                        13,306
Accretion of redeemable
 preferred stock to redemption
 value.........................                                                           (119,130)                       (119,130)
Net loss.......................                                                         (9,508,795)                     (9,508,795)
                                -------  ----------   ------  ---------  -----------  ------------  ------- --------  ------------
Balance at December 31, 1997... 185,714   1,299,998   13,391        134   17,856,790   (50,443,464)     545  (11,628)  (31,298,170)

Issuance of common stock
 pursuant to stock option
 exercises.....................                        2,187         22          970                                           992
Accrued dividend on Series III
 and Series VII convertible
 preferred stock...............                                                         (2,685,522)                     (2,685,522)
Value of options transferred
 pursuant to the UCB asset
 purchase agreement
 (Note 3)......................                                              329,000                                       329,000
Accretion of redeemable
 preferred stock to redemption
 value.........................                                                           (294,257)                       (294,257)
Net income.....................                                                          5,178,383                       5,178,383
                                -------  ----------   ------  ---------  -----------  ------------  ------- --------  ------------
Balance at December 31, 1998... 185,714  $1,299,998   15,578  $     156  $18,186,760  $(48,244,860)     545 $(11,628) $(28,769,574)
                                =======  ==========   ======  =========  ===========  ============  ======= ========  ===========
</TABLE>

   The accompanying notes are an integral part of these financial statements.

<PAGE>
                                 CYTOMED, INC.
                             STATEMENT OF CASH FLOWS
               INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                      YEAR ENDED DECEMBER 31,
                                                                               1998              1997               1996
<S>                                                                        <C>               <C>                <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net income (loss)                                                       $  5,178,383      $  (9,508,795)     $  (6,525,673)
   Adjustments to reconcile net income (loss) to net cash used in
    operating activities:
      Depreciation and amortization                                             235,469            307,038            365,920
      Amortization of debt discount                                                   -            489,197              4,467
      Accrued interest converted to equity                                            -            351,728                  -
      Compensation related to the grant of common stock options                       -             13,306                  -
      Gain on termination of collaboration agreement                                  -           (250,000)                 -
      Gain on sale of assets                                                (10,798,451)                 -                  -
      Changes in assets and liabilities:
        Other current assets                                                   (189,552)             3,908            (45,533)
        Other receivables                                                      (155,681)                 -                  -
        Accounts payable                                                       (524,909)           103,642            368,736
        Accrued expenses                                                        (29,577)           380,787            (76,378)
                                                                           ------------       ------------      -------------
   Net cash used in operating activities                                     (6,284,318)        (8,109,189)        (5,908,461)
                                                                           ------------       ------------      -------------
CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchases of marketable securities                                        (5,657,105)        (7,728,214)                 -
   Proceeds from maturities and sales of marketable securities                9,241,379                  -                  -
   Decrease in other assets                                                      32,600                  -             50,400
   Purchases of fixed assets                                                 (1,505,681)          (329,911)          (235,290)
   Proceeds from sale of assets                                               6,898,510                  -                  -
                                                                           ------------       ------------      -------------
   Net cash provided by (used in) investing activities                        9,009,703         (8,058,125)          (184,890)
                                                                           ------------       ------------      -------------
CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from notes payable from related parties                                   -          5,720,650          1,000,000
   Proceeds from sale leaseback transactions                                          -                  -            127,353
   Principal payments on capital lease obligations                             (141,022)          (144,579)          (191,269)
   Proceeds from issuance of redeemable preferred stock, net                  1,853,236         10,540,945          3,042,454
   Proceeds from issuance of warrants to purchase preferred
    stock and common stock                                                            -             13,393              9,546
   Proceeds from issuance of common stock                                           992              4,683                  -
                                                                           ------------       ------------      -------------
   Net cash provided by financing activities                                  1,713,206         16,135,092          3,988,084
                                                                           ------------       ------------      -------------
Increase (decrease) in cash and cash equivalents                              4,438,591            (32,222)        (2,105,267)

Cash and cash equivalents at beginning of year                                  955,643            987,865          3,093,132
                                                                           ------------       ------------      -------------
Cash and cash equivalents at end of year                                   $  5,394,234       $    955,643      $     987,865
                                                                           ------------       ------------      -------------
                                                                           ------------       ------------      -------------
</TABLE>

SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:

During 1997. notes payable and accrued interest totaling $7,072,378 were
converted into 6,488,420 shares of Series VII convertible preferred stock.

During 1997 and 1996, the Company recorded debt discounts and additional
paid-in-capital totaling $354,197 and $135,000, respectively, relating to the
issuance of warrants.

During 1997, the Company acquired its Series IV convertible preferred stock
in exchange for the cancellation of a collaboration and license agreement
(Note 4).

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:

During 1998, 1997 and 1996, the Company paid approximately $8,000, $26,000
and $29,000, respectively, for interest.


  The accompanying notes are an integral part of these financial statements.


<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


1.     NATURE OF OPERATIONS

       CytoMed, Inc. (the "Company") was incorporated under the laws of the
       state of Delaware in May 1986. The Company is engaged in the discovery
       and development of innovative anti-inflammatory and analgesic
       pharmaceutical products. The Company's principal line of business is
       to license its proprietary technology to established pharmaceutical
       companies worldwide and to create corporate alliances with these
       companies to develop its technology for commercialization.

2.     SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

       Significant accounting policies followed in preparation of the
       financial statements are as follows:

       REVENUE RECOGNITION

       Revenue from collaboration or other contractual agreements is
       recognized pursuant to the related agreements as work is performed and
       defined milestones are attained. Payments received under these
       arrangements for research prior to the completion of the related work
       and attainment of milestones are recorded as deferred revenue.
       Payments received for license fees or options to license technology
       are recognized ratably over the related research period.

       PATENT COSTS

       The Company has incurred expenditures to register patents and
       trademarks for the technology that it sells under various license and
       collaboration agreements. Payments made to register these patents and
       trademarks have been expensed as incurred because recovery of the
       related costs is not sufficiently assured.

       CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

       The Company considers all highly liquid investments purchased with an
       original maturity of three months or less to be cash equivalents. The
       Company invests excess cash primarily in money market accounts,
       government debt securities and corporate bonds which have strong
       credit ratings. These investments are subject to minimal credit and
       market risks. The Company classifies these investments as
       available-for-sale. All available-for-sale investments are recorded at
       amortized cost which approximates fair market value.

       FIXED ASSETS

       Fixed assets are stated at cost and depreciated using the
       straight-line method over their estimated useful lives. Leasehold
       improvements are amortized using the straight-line method over the
       shorter of their estimated useful lives or the term of the respective
       leases. Maintenance and repair costs are expensed as incurred.

       STOCK COMPENSATION

       Stock options issued to employees under the Company's stock option
       plans are accounted for in accordance with Accounting Principles Board
       ("APB") Opinion No. 25 and related interpretations. The Company
       adopted Statement of Financial Accounting Standards ("SFAS") No. 123
       through disclosure only (Note 10).

       FINANCIAL INSTRUMENTS

       The carrying amount of the Company's financial instruments, which
       include cash, cash equivalents, marketable securities, accounts
       payable, accrued expenses and notes payable approximates their fair
       value at the balance sheet dates.


<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


       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 reported amounts of assets and
       liabilities, the disclosure of contingent assets and liabilities at
       the date of the financial statements and the reported amounts of
       revenues and expenses during the reporting period. Actual results
       could differ from these estimates.

       NEW ACCOUNTING PRONOUNCEMENTS

       In June 1997, the Financial Accounting Standards Board (the "FASB")
       issued SFAS No. 130, "Reporting Comprehensive Income." The statement
       establishes standards for the reporting and display of comprehensive
       income and its components. Comprehensive income is defined as the
       change in equity of a business enterprise during a period from
       transactions and other events and circumstances from non-owner
       sources. It includes all changes in equity during a period except
       those resulting from investments by owners and distributions to
       owners. This standard requires that an enterprise display an amount
       representing total comprehensive income for the period. The adoption
       of SFAS No. 130 by the Company in 1998 has no impact on the Company as
       the Company has no other components of comprehensive income other than
       net income.

       In June 1998, the FASB issued SFAS No. 133, "Accounting for Derivative
       Instruments and Hedging Activities." This statement establishes new
       standards for the recognition of gains and losses on derivative
       instruments and provides guidance as to whether a derivative may be
       accounted for as a hedging instrument. Gains or losses from hedging
       transactions may be wholly or partially recorded in earnings or
       comprehensive income as part of a cumulative translation adjustment,
       depending upon the classification of the hedge transaction. Gain or
       loss on a derivative instrument not classified as a hedging instrument
       is recognized in earnings in the period of change. SFAS No. 133 will
       be effective for the Company beginning in 2000. The Company does not
       believe adoption of SFAS No. 133 will have a material impact on its
       financial position or its results of operations.

3.     SALE OF ASSETS

       On October 23, 1998, the Company entered into an asset purchase
       agreement ("Purchase Agreement") with UCB Research, Inc., UCB Farchim,
       S.A., and UCB, S.A. (collectively "UCB"). Under the terms of the
       agreement, the Company sold to UCB assets relating to certain research
       programs for a total of $12.9 million, of which $6.9 million was
       received in 1998 and the remaining $6.0 million is due in October 1999
       and is recorded as an other receivable on the accompanying balance
       sheet. An additional payment of up to $6.0 million from UCB is
       contingently due upon programs sold to UCB reaching certain future
       milestones. The Company recognized a gain of $10.8 million on this
       sale, which is included in other income for 1998. Under the terms of
       the Purchase Agreement, the terms of the outstanding stock options of
       employees who were offered employment by UCB were modified to allow
       for each individual to retain ownership of, and continue vesting in,
       their stock options upon the individual's continued employment with
       UCB. The Company determined the aggregate fair value of the affected
       options at the date of the modification to be $329,000, which was
       recorded as a reduction in the gain recognized on the sale of assets.

       In February 1998, the Company had entered into a three year research
       and license option agreement with UCB, SA. Under the terms of this
       agreement, the Company received $3 million in February 1998, of which
       $1.5 million represented an option fee to obtain an exclusive
       worldwide license to develop and market a specified compound and $1.5
       million represented prepaid research fees. During 1998, the Company
       recognized the entire option fee as this agreement was canceled in
       October 1998 upon the signing of the asset purchase agreement. The
       Company recognized a total of $1,872,617 in research fees under the
       research and license option agreement during 1998.

<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


4.     SIGNIFICANT AGREEMENTS

       In April 1994, the Company entered into a License and Collaboration
       Agreement (the "Chiron Agreement") and an Equity Letter Agreement
       (Note 9) with Chiron Corporation ("Chiron"). Under the terms of the
       Chiron Agreement, the Company will develop a specific compound and
       will complete the preclinical trials, after which the Company will
       license the compound to Chiron. In exchange, the Company will receive
       milestone payments up to $7.5 million during drug development and
       royalty payments based on sales of the product. The Chiron Agreement
       will expire eight years from the date of the first commercial sale of
       the licensed product. Chiron also made payments to the Company of $1.5
       million for certain research and development activities, of which $1.0
       million and $0.5 million was received and recognized as revenue in
       1995 and 1996, respectively.

       In March 1995, the Company entered into a Collaboration Agreement, a
       License Agreement (collectively the "Grelan Agreement") and a Stock
       Purchase Agreement (Note 9), with Grelan Pharmaceutical Co. Ltd.
       ("Grelan"). Under the terms of the Grelan Agreement, the Company
       participated in the joint development of a specified Company compound
       for use in a Grelan product. In exchange, the Company was entitled to
       receive milestone payments during drug development and royalty
       payments based on sales of the product. The Collaboration Agreement
       was set to expire in 1998, and the License Agreement was set to expire
       on the later of ten years from the date of the first commercial sale
       of the licensed compound or the expiration of the related patent.
       Under the Grelan Agreement, Grelan was required to reimburse 50% of
       the preclinical expenses incurred by the Company and was required to
       make two $500,000 license fee payments on each of the first two
       anniversaries of the Grelan Agreement of which $500,000 was received
       and recognized as revenue in 1996. Reimbursements of approximately
       $205,000 of preclinical expenses were recorded as an offset to
       research and development expense in 1996. During 1997, the Company and
       Grelan agreed to terminate the Grelan Agreement.

       Under the termination agreement, the Company reacquired the 258,400
       shares of Series IV convertible preferred stock that was originally
       issued for proceeds of $1,500,012 and the license to a certain
       compound that had been issued to Grelan under the terms of the Stock
       Purchase Agreement and Grelan Agreement, respectively. In addition,
       Grelan was released from all future obligations under the Grelan
       Agreement, which included the payment of a $53,000 receivable due to
       the Company at December 31, 1996, the second $500,000 license fee
       payment and reimbursements for 50% of the preclinical expenses
       incurred by the Company in 1997. The Company recorded $250,000 as
       other income resulting from the termination agreement and wrote off
       the $53,000 receivable balance to expense during 1997.


<PAGE>


                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

       In May 1996, the Company entered into an Option Agreement and a Stock
       Purchase Agreement (Note 9) with Stiefel Laboratories Inc.
       ("Stiefel"). Under the terms of this Option Agreement, the Company
       will deliver a sample of a specified Company compound to Stiefel for
       clinical testing. Within sixty days after completion of the clinical
       tests or within nine months of the date of delivery, whichever is
       earlier, Stiefel may exercise its option to obtain an exclusive
       license to develop, market and sell the compound in specific
       territories. Upon exercise of the option, Stiefel is required to make
       a $1.0 million non-refundable license fee payment. The Option
       Agreement also grants Stiefel the right to purchase $5.0 million of
       capital stock in lieu of a certain $3.0 million milestone payment that
       would be required under the license.

       In December 1997, the Company entered into an Option Agreement with
       Boehringer Ingelhiem International, GmbH ("BI"). Under the terms of
       the Option Agreement, the Company delivered a specified compound to BI
       for clinical testing. At any time during the option period, which was
       set to expire within 90 days after completion of the clinical tests or
       by October 31, 1998, whichever was earlier, BI had the right to
       exercise its option to obtain an exclusive worldwide license to
       develop, market and sell the compound. BI did not exercise its option
       during 1998. Under the terms of this Option Agreement, BI paid to the
       Company a $500,000 nonrefundable option fee, which was recognized as
       revenue in 1997.

5.     CASH EQUIVALENTS AND MARKETABLE SECURITIES

       The following is a summary of available-for-sale securities:

<TABLE>
<CAPTION>


                                                                      DECEMBER 31,
                                            MATURITY               1998           1997
<S>                                        <C>                  <C>            <C>

       Money market funds                      --               $3,954,363     $  955,643
       Government securities                 3 months              625,081      7,728,214
       Corporate Bonds                     3-12 months           4,294,577             --
       Municipal Bonds                       12 months             649,675             --
                                                                ----------     ----------
                                                                $9,523,696     $8,683,857
                                                                ----------     ----------
                                                                ----------     ----------
</TABLE>


       The Company has not realized any gains or losses on available-for-sale
       securities during the three years ended December 31, 1998.

<PAGE>


                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

6.     FIXED ASSETS

       Fixed assets consist of the following:

<TABLE>
<CAPTION>
                                                           DECEMBER 31,
                                                        ------------------
                                                        1998          1997
                                                        ----          ----
       <S>                                            <C>          <C>

       Research equipment                             $     --     $1,307,560
       Office equipment                                111,446        427,319
       Furniture and fixtures                           51,417         64,528
       Leasehold improvements                               --        156,286
                                                      --------     ----------
                                                       162,863      1,955,693
       Less-accumulated depreciation and                57,568      1,414,487
          amortization                                --------     ----------

                                                      $105,295     $  541,206
                                                      --------     ----------
                                                      --------     ----------

</TABLE>

       Included in research and office equipment are assets held under capital
       leases of $488,683 at December 31, 1997. Accumulated amortization on
       these assets totaled $308,406 at December 31, 1997. For the years ended
       December 31, 1998, 1997 and 1996, amortization expense on assets held
       under capital lease obligations was $70,308, $97,737, and $84,856,
       respectively.


7.     ACCRUED EXPENSES

       Accrued expenses consist of the following:

<TABLE>
<CAPTION>
                                                           DECEMBER 31,
                                                        ------------------
                                                        1998          1997
                                                        ----          ----
       <S>                                            <C>          <C>

       Employee compensation and benefits             $266,866     $  280,377
       Professional services                           202,094         49,893
       Other                                           117,652        220,983
                                                      --------     ----------

                                                      $586,612     $  551,253
                                                      --------     ----------
                                                      --------     ----------

</TABLE>

8.     CONVERTIBLE NOTES PAYABLE

       In September 1996, the Company entered into a Credit Agreement (the
       "Agreement") with certain of its stockholders which provided for
       financing up to $3.0 million through the issuance of one year unsecured
       promissory notes at a 10.25% interest rate per annum. Pursuant to the
       Agreement, the Company was also required to issue warrants to purchase up
       to 400,000 shares of the Company's common stock with an exercise price of
       $1.95 per share. The Agreement provided that 100,000 warrants will be
       issued upon the initial borrowing, one warrant will be issued for each
       $10 borrowed and each warrant will be purchased by the investors for
       $0.01 per warrant. In December 1996, the


<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


       Company borrowed $1.0 million under the Agreement and issued warrants to
       purchase 200,000 shares of the Company's common stock. The warrants were
       exercisable and expire at various times through December 11, 2006. The
       proceeds of this financing were allocated to the notes and to the
       warrants based on management's estimate of their fair values. This
       resulted in $137,000 being ascribed to warrants which was recorded as
       additional paid-in-capital. Of this amount, $135,000 was recorded as a
       discount to the face value of the notes and was amortized over the term
       of the notes. In 1997, the Company borrowed the remaining $2.0 million
       under the Agreement and issued warrants to purchase 200,000 shares of the
       Company's common stock. In addition, during 1997 the Company borrowed
       $3,720,650 under separate agreements from existing stockholders in the
       form of unsecured promissory notes at an interest rate of 10.50% per
       annum. In connection with these notes, the Company issued warrants to
       purchase up to 493,050 and 18,397 shares of the Company's common stock
       with an exercise price of $1.95 and $7 per share of common stock,
       respectively. The proceeds from the 1997 financings were allocated to the
       notes and to the warrants based on management's estimate of their fair
       values. This resulted in $363,312 being ascribed to warrants which was
       recorded as additional paid-in-capital. Of this amount, $354,197 was
       recorded as a discount to the face value of the notes. The discount was
       amortized over the period from issuance of the notes to the conversion
       into Series VII convertible preferred stock (see Note 9) and is included
       in interest expense for the year ended December 31, 1997.


<PAGE>


9.     PREFERRED STOCK AND STOCKHOLDERS' EQUITY

       The following table summarizes redeemable preferred stock activity during
       each of the three years in the period ended December 31, 1998.

<TABLE>
<CAPTION>
                                                        REDEEMABLE CONVERTIBLE
                                                            PREFERRED STOCK
                                                        ----------------------
                                                         SHARES        AMOUNT
                                                         ------        ------
       <S>                                            <C>           <C>

       Balance at December 31, 1995                     5,810,443   $18,859,695

       Issuance of Series VI preferred stock              248,922     1,742,456
       Accrued dividend on Series III preferred stock          --     1,192,170
       Accretion to redemption value                           --        92,760
                                                       ----------   -----------

       Balance at December 31, 1996                     6,059,365   $21,887,081

       Issuance of Series VI preferred stock              192,246     1,345,722
       Issuance of Series VII preferred stock,
         net issuance cost of $976,777                  9,174,312     9,195,223
       Issuance of warrants to purchase common stock
         as payment of issuance costs on Series VII
         preferred stock                                       --      (172,000)
       Issuance of Series VII preferred stock upon
         conversion of convertible notes payable        6,488,420     7,072,378
       Issuance of Series VI preferred stock              588,224            --
       Acquisition and retirement of Series IV
         preferred stock                                 (258,400)    (1,500,012)
       Accrued dividend on Series III and VII
         preferred stock                                       --      1,252,040
       Accretion to redemption value                           --        119,130
                                                       ----------    -----------

       Balance at December 31, 1997                    22,244,167     39,199,562

       Issuance of Series VII preferred stock, net
         of issuance costs of $146,764                  1,834,862      1,853,236
       Accrued dividend on Series III and Series VII
         preferred stock                                       --      2,685,522
       Accretion to redemption value                           --        294,257
                                                       ----------    -----------

       Balance at December 31, 1998                    24,079,029    $44,032,577
                                                       ----------    -----------
                                                       ----------    -----------

</TABLE>


       In December 1997, the Company sold 9,174,312 shares of newly designated
       Series VII convertible preferred stock for net proceeds of $9,195,223. As
       payment of certain offering costs associated with the issuance of the
       Series VII convertible preferred stock, the Company issued a warrant,
       which expires in ten years, to purchase 500,000 shares of the Company's
       common stock with an exercise price of $1.09 per share of common stock.
       Management ascribed a value to the warrant of $172,000 which was recorded
       as issuance costs for the Series VII convertible preferred stock. The
       Company issued an additional 1,834,862 shares of Series VII preferred
       stock for net proceeds of $1,853,236 in March 1998.

       Also in December 1997, the Company converted notes payable plus accrued
       interest in the amount of $7,072,378 into 6,488,420 shares of Series VII
       convertible preferred stock.

<PAGE>
                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

       In May 1996 and pursuant to the Stiefel Stock Purchase Agreement (Note
       4), the Company sold 185,714 shares of newly designated Series V
       convertible preferred stock to Stiefel for net proceeds of $1,299,998.
       This agreement also granted to Stiefel the right to purchase an
       additional $5.0 million in Series V convertible stock at the then-current
       fair value on or before October 1, 1999.

       In May 1995 and pursuant to the Grelan Stock Purchase Agreement (Note 4),
       the Company sold 258,400 of newly designated Series IV convertible
       preferred stock to Grelan for net proceeds of $1,500,012. This stock was
       reacquired by the Company in 1997 (Note 4).

       In July 1994 and pursuant to the amended Chiron Equity Letter Agreement
       (Note 4), the Company sold 400,000 shares of newly designated Series II
       convertible preferred stock to Chiron for net proceeds of $1,200,000. The
       Company also sold to Chiron for $100,000 a warrant to purchase an
       additional 25,000 shares of Series II preferred stock with an exercise
       price of $3.90 per share. In October 1996 and pursuant to the Equity
       Letter Agreement, the Company sold 248,922 shares of newly designated
       Series VI convertible preferred stock to Chiron for net proceeds of
       $1,742,456. Also during 1996, the Company sold to Chiron for $7,546 a
       warrant to purchase an additional 5,390 shares of the Series VI
       convertible preferred stock with an exercise price of $9.10 per share. In
       May 1997 and pursuant to the Equity Letter Agreement, the Company sold an
       additional 192,246 shares of Series VI convertible preferred stock to
       Chiron for net proceeds of $1,345,722. The Company also sold to Chiron
       for $4,278 a warrant to purchase an additional 3,054 shares of the Series
       VI convertible preferred stock with an exercise price of $9.10 per share.
       In December 1997 and in connection with the issuance of the Series VII
       convertible preferred stock, the Company issued 588,224 shares of Series
       VI convertible preferred stock to Chiron in settlement of the
       anti-dilutions provisions of the Series VI convertible preferred stock.

       During 1998, the Company increased the number of authorized shares of
       common stock to 29,025,945 shares.

       PREFERRED STOCK
       Preferred stock has the following characteristics:

         DIVIDEND PROVISIONS
         The holders of the Series III and Series VII convertible preferred
         stock are entitled to a cumulative dividend of 8% of the initial
         issuance price of the shares per annum which accrues daily whether or
         not such dividend is declared or paid. This cumulative dividend is
         being recorded by a charge to accumulated deficit and by an increase in
         the carrying value of the Series III and the Series VII convertible
         preferred stock. When and if declared by the Board of Directors and
         prior to the payment of dividends to common stockholders, the Company
         will first pay the cumulative dividend on the Series VII convertible
         preferred stock, then pay the cumulative dividend on the Series III
         convertible preferred stock and lastly pay the declared dividend to all
         preferred stockholders.

         LIQUIDATION RIGHTS
         In the event of any liquidation, dissolution or winding-up of the
         Company, the Series VII convertible preferred stock shall rank senior
         to any other class of stock. The Series I, II, III and VI convertible
         preferred stock (the "Senior Preferred Stock") shall rank equally with
         each other and senior to the Series V convertible preferred stock and
         common stock. The Series V convertible preferred stock ranks senior to
         the common stock of the Company. The holders of the Series VII
         convertible preferred stock will be entitled to receive, before
         payments to any other class of stock are made, and amount equal to
         $1.09 per share plus any cumulative and declared but unpaid dividends.
         After all payments have been made to the Series VII preferred
         stockholders, the holders of the Senior Preferred Stock will be
         entitled to receive, before payments to the Series V preferred
         stockholders and the common stockholders are made, an amount equal to
         $3.30 for the Series I and II preferred stock, $3.00 for the Series III
         preferred stock and $7.70 for the Series VI preferred stock per share,
         subject to adjustment, plus any declared but unpaid dividends and, in
         the case of the Series III preferred stockholders, any unpaid
         cumulative dividends. After all payments described above have been made
         to the holders of the Senior Preferred Stock, the holders of the Series
<PAGE>
                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


         V convertible preferred stock and Senior Preferred Stock will be
         entitled to receive, before payments to the common stockholders are
         made, the following amounts: Series V preferred stockholders will
         receive an amount equal to $7.70 per share, plus any declared but
         unpaid dividends; and the holders of Senior Preferred Stock will
         receive an amount equal to the aggregate amount distributable to the
         Series V preferred stockholders, distributed in an equal amount per
         share of the Senior Preferred Stock then outstanding.

         VOTING RIGHTS
         Holders of the preferred stock are entitled to vote upon any matter
         submitted to the stockholders for a vote. Each share of preferred stock
         will have one vote for each share of common stock into which the
         respective share of preferred stock is convertible on the record date
         for the vote.

         CONVERSION RIGHTS
         The preferred stock is convertible, at the option of the holder, into
         common stock of the Company based on a formula which currently would
         result in a 1-for-1 exchange for the Series I, II, III, VI and VII
         stockholders and a 1-for-1.47 exchange for the Series V stockholder.
         The preferred stock will automatically convert into common stock upon
         the closing of a public offering of the Company's common stock in which
         net proceeds equal or exceed $15 million and the price per share equals
         or exceeds $3.00.

         REDEMPTION
         Upon the written request from the holders of at least the majority of
         the Series VII preferred stock, on December 15, 2002 and the first and
         second anniversaries thereof, the Company will redeem the Series VII
         preferred stock at a price equal to the amount to which the holder
         would be entitled to receive in the event of a liquidation (the
         "Redemption Price"). Upon the written request from the holders of at
         least the majority of the Senior Preferred Stock at any time after
         March 22, 2000, the Company will redeem the Senior Preferred Stock at a
         price equal to the amount to which the holder would be entitled to
         receive in the event of a liquidation (the "Redemption Price") in three
         annual payments. The difference between the net issuance price and the
         Redemption Price for the Series II, III, VI and VII convertible
         preferred stock is being accreted by a charge to accumulated deficit.
         The Series V preferred stock is not redeemable.

       RESERVED STOCK
       At December 31, 1998, the Company has 1,512 shares, 25,000 shares, 24,102
       shares and 19,703 shares of Series I, II, III and VI convertible
       preferred stock, respectively, reserved for issuance upon the exercise of
       warrants. At December 31, 1998, the Company also has 29,009,754 shares of
       common stock reserved for issuance upon the conversion of the preferred
       stock outstanding and upon the exercise of warrants and options.

       WARRANTS
       The Company has issued warrants to purchase common and preferred stock in
       connection with the issuance of notes payable (Note 8), the establishment
       of capital lease facilities (Note 12) and the issuance of the Series VII
       preferred stock (Note 9). Warrants outstanding at December 31, 1998 are
       as follows:

<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

<TABLE>
<CAPTION>

                                                             EXERCISE
                                                 NUMBER        PRICE
       SECURITY                                 OF SHARES    PER SHARE    EXPIRATION DATE
       <S>                                      <C>          <C>          <C>

       Series I convertible preferred stock           614       $3.00      July 31, 2001
       Series I convertible preferred stock           898        3.00      April 30, 2003
       Series II convertible preferred stock       25,000        3.90      July 11, 1999
       Series III convertible preferred stock      24,102        3.00      See Note 12
       Series VI convertible preferred stock       19,703        3.90      October 3, 2001
       Common stock                                47,080        0.28      June 18, 2001 - February 25, 2006
       Common stock                               898,009        1.95      December 11, 2006 - December 15, 2007
       Common stock                               559,633        1.09      April 13, 2003 - December 15, 2007
       Common stock                                18,397        7.00      August 22, 2007

</TABLE>

       Certain of the warrant agreements contain antidilution provisions related
       to future issuances of stock. In 1997, in connection with the issuance of
       the Series VII convertible preferred stock, the Company issued additional
       warrants to purchase 11,259 shares of the Series VI convertible preferred
       stock at an exercise price of $3.90 per share and reduced the exercise
       price on outstanding warrants to purchase 8,444 shares of Series VI
       convertible preferred stock from $9.10 to $3.90 per share to satisfy
       antidilution provisions.


10.    STOCK OPTION PLANS

       The 1991 Stock Option Plan (the "Plan") provides for the grant of
       incentive and nonqualified stock options for the purchase of shares of
       the Company's common stock by employees, directors and consultants of the
       Company. In 1998, the Plan was amended to provide for the purchase of up
       to an aggregate of 2,969,453 shares of the Company's common stock. The
       Board of Directors is responsible for the administration of the Plan. The
       Board of Directors determines the term of each option, number of shares
       for which each option is granted and the price at which each option is
       exercisable. The Company may not grant an employee incentive stock
       options with a fair market value in excess of $100,000 that is
       exercisable during any one calendar year. The term of incentive stock
       options granted cannot exceed ten years (five years for options granted
       to holders of more than 10% of the voting stock of the Company). The
       exercise price for incentive stock options granted may not be less than
       100% of the fair market value per share of the underlying common stock
       (110% for options granted to holders of more than 10% of the voting stock
       of the Company). Stock appreciation rights may be granted in tandem with
       option grants and would be exercisable to the same extent and under the
       same conditions as the underlying option.

       In September 1996, the Company established the 1996 Director Stock Option
       Plan (the "Director Plan") which provides for the grant of non-qualified
       stock options for the purchase of up to 110,000 shares of the Company's
       common stock to the members of the Board of Directors of the Company. The
       Director Plan also provides for the automatic grant of options (the
       "Automatic Options") to purchase 6,000 shares to each eligible member of
       the Board of Directors on the date the Director Plan becomes effective
       and, subsequently, on the date that the Director is elected to the Board
       of Directors. Each Automatic Option vests ratably over a five year period
       beginning on the first

<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


       anniversary of the date of the grant. Options granted under the Director
       Plan that are not Automatic Options vest in accordance with the terms of
       each option agreement as established by the Board of Directors. The
       exercise price for all options under the Director Plan may not be less
       than the fair market value of the underlying common stock on the date of
       grant.

       No compensation expense was recorded related to stock-based employee
       compensation awards. Had compensation cost been determined based on the
       fair value of the options granted to employees at the grant date, as
       prescribed by SFAS No. 123, the Company's net income (loss) for the years
       ended December 31, 1998, 1997 and 1996 would have been approximately
       $5,100,000, $(9,595,000) and $(6,576,000), respectively.

       For purposes of the pro forma disclosure, the fair value of each option
       grant was estimated on the date of grant based upon the following
       assumptions: no dividend yield; no volatility; risk-free interest rate of
       5.1%, 6.2% and 6.8% for 1998, 1997 and 1996, respectively; and expected
       option term of 7 years.

       During 1997, the Company granted options in the amount of 17,693 to
       nonemployees under the Plan. The estimated fair value of these options
       totaled $13,306 which was recorded as compensation expense during 1997.

       A summary of the status of the Company's stock option plans as of
       December 31, 1998, 1997 and 1996 and changes during the years then ended
       is presented below:


<TABLE>
<CAPTION>
                                             1998                      1997                     1996
                                      --------------------     ---------------------     --------------------
                                                  WEIGHTED                  WEIGHTED                 WEIGHTED
                                                  AVERAGE                   AVERAGE                  AVERAGE
                                                  EXERCISE                  EXERCISE                 EXERCISE
                                      SHARES       PRICE        SHARES       PRICE       SHARES       PRICE
<S>                                 <C>           <C>           <C>         <C>          <C>         <C>

Outstanding at beginning of year    $1,055,679       $1.01       970,142       $0.96      558,518      $0.45
Granted                              2,077,638        0.50       130,693        1.40      434,864       1.58
Exercised                               (2,187)       0.45       (10,407)       0.45           --         --
Cancelled                             (251,258)       1.66       (34,749)       1.12      (23,240)      0.46
                                    ----------       -----       -------       -----     --------      -----
Outstanding at end of year           2,809,872        0.60     1,055,679        1.01      970,142       0.96
                                    ----------                 ---------                 --------
                                    ----------                 ---------                 --------

Options exercisable at end of year     805,173        0.64       488,768        0.66      362,616       0.45
                                    ----------                 ---------                 --------
                                    ----------                 ---------                 --------

Weighted-average fair value of
  options granted during the year   $     0.15                 $    0.68                     0.60
                                    ----------                 ---------                 --------
                                    ----------                 ---------                 --------

Options available for future grant     254,993
                                    ----------
                                    ----------
</TABLE>

<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS


       The following table summarizes information about stock options
outstanding at December 31, 1998:


<TABLE>
<CAPTION>

                                                  WEIGHTED        WEIGHTED                              WEIGHTED
                                                  AVERAGE         AVERAGE                               AVERAGE
                                     NUMBER       EXERCISE        REMAINING            NUMBER           EXERCISE
EXERCISE PRICE                     OUTSTANDING    PRICE        CONTRACTUAL LIFE       EXERCISABLE       PRICE
<S>                                <C>           <C>           <C>                  <C>                 <C>


$0.30 - $0.50                      2,449,166       $0.49             8.7               649,367           $0.46
 0.53 -  0.70                        116,513        0.68             7.2                68,113            0.68
 1.40 -  1.95                        194,193        1.93             8.0                87,693            1.93
                                   ---------                                           -------

                                   2,809,872        0.60             8.6               805,173            0.64
                                   ---------                                           -------
                                   ---------                                           -------
</TABLE>


11.    INCOME TAXES

       The Company's deferred tax assets and (liabilities) consist of the
following:

<TABLE>
<CAPTION>

                                                                   DECEMBER 31,
                                                               1998              1997
<S>                                                         <C>              <C>
Net operating loss carryforwards                            $ 17,317,000      $ 18,067,000
Tax credit carryforwards                                       2,522,000         2,086,000
Other                                                             84,000           229,000
                                                            ------------      ------------
Gross deferred tax assets                                     19,923,000        20,382,000

Deferred gain on sale of assets                               (4,381,000)               --
                                                            ------------      ------------

Net deferred tax assets                                       15,542,000        20,382,000

Valuation allowance                                          (15,542,000)      (20,382,000)
                                                            ------------      ------------

                                                            $         --      $         --
                                                            ------------      ------------
                                                            ------------      ------------
</TABLE>

       Deferred income taxes reflect the tax impact of temporary differences
       between the amount of assets and liabilities for financial reporting
       purposes and such amounts as measured by tax laws and regulations.
       Under SFAS No. 109, the benefit associated with future deductible
       temporary differences is recognized if it is more likely than not that
       a benefit will be realized. Based on historical evidence, the Company
       has recorded a valuation allowance that offsets all net deferred tax
       assets.


<PAGE>
                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

       At December 31, 1998, the Company has U.S. Federal net operating loss
       carryforwards and tax credit carryforwards available to reduce future
       tax liabilities which expire as follows:

<TABLE>
<CAPTION>

                                       NET OPERATING
 YEAR OF                                   LOSS                      TAX  CREDIT
EXPIRATION                             CARRYFORWARDS                CARRYFORWARDS
<S>                                    <C>                          <C>


2005                                    $   429,000                   $   32,000
2006                                      2,969,000                      142,000
2007                                      5,192,000                      100,000
2008                                      6,418,000                      314,000
2009                                      8,287,000                      373,000
2010                                      5,045,000                      101,000
2011                                      6,459,000                      108,000
2012                                      9,544,000                      322,000
2018                                             --                      423,000
                                        -----------                   ----------
                                        $44,343,000                   $1,915,000
                                        -----------                   ----------
                                        -----------                   ----------
</TABLE>

       The Company has $29,107,000 of state net operating loss carryforwards
       which expire at various dates in 1999 to 2002 in approximately the
       same proportion as the federal net operating loss carryforwards
       expiring in 2005 to 2008 described above. The Company also has
       $1,163,000 of state tax credit carryforwards which expire at various
       dates in 2006 to 2013 in approximately the same proportion as the
       federal tax credit carryforwards expiring in the same years described
       above. Under the Internal Revenue Code, certain substantial changes in
       the Company's ownership could result in an annual limitation on the
       amount of net operating loss and tax credit carryforwards which can be
       utilized in future years.

12.    COMMITMENTS

       LEASES

       The Company leases facilities under a noncancellable operating lease,
       which expires in March 1999. The minimum lease commitments under this
       lease total approximately $25,000.

       Rent expense was approximately $682,000, $782,000 and $514,000 in
       1998, 1997 and 1996, respectively.

       In connection with the facilities lease, the Company had a standby
       letter of credit outstanding in favor of the lessor for $25,000 at
       December 31, 1997. This letter of credit was collateralized by a
       certificate of deposit, which was included in other assets, totaling
       $25,000 at December 31, 1997. In October 1998, in conjunction with the
       UCB asset purchase agreement (Note 3), the letter of credit and
       related certificate of deposit were transferred to UCB.

       The Company had entered into an agreement which allowed the Company to
       lease up to $750,000 of laboratory and office equipment. At December
       31, 1997, the Company had acquired approximately $665,000 of equipment
       under the agreement. In October 1998, in conjunction with the UCB
       asset purchase agreement (Note 3), the Company purchased all assets
       held under this lease agreement. In connection with this lease, the
       Company issued warrants to the lessor in 1995 for the purchase of
       24,102 shares of Series III convertible preferred stock in 1995 at an
       exercise price of $3.00 per share. This warrant expires on August 2,
       2005 or five years from the effective date of an initial public
       offering of common stock by the Company, whichever is sooner. The
       value ascribed to the warrant totaled $19,300 and was accounted for as
       discount on the related capital lease obligation. The discount was
       amortized as interest expense during the term of the lease.

<PAGE>

                                  CYTOMED, INC.
                          NOTES TO FINANCIAL STATEMENTS

              In April 1998, the Company entered into an agreement to lease
              up to $2.5 million of equipment and tenant improvements. At
              December 31, 1998, no amounts were outstanding under the
              agreement. In connection with this agreement, the Company
              issued a warrant to the lessor for the purchase of 59,633
              shares of common stock at an exercise price of $1.09 per share.
              The warrant expires in April 2003. The value ascribed to the
              warrant was not significant.

       RESEARCH, LICENSE AND CONSULTING AGREEMENTS The Company has entered
       into research, license and consulting agreements to support its
       research and development activities which expire at various dates
       through June 1999. Amounts charged to operations in connection with
       these agreements for the years ended December 31, 1998, 1997 and 1996
       totaled approximately $321,000, $470,000 and $540,000, respectively.
       Certain of the agreements contain provisions for future royalties to
       be paid on sales of products developed under the agreements.

13.    SUBSEQUENT EVENTS

       On February 11, 1999, LeukoSite, Inc. ("LeukoSite") acquired all of
       the outstanding common and preferred stock of the Company in exchange
       for approximately 935,000 shares of LeukoSite Series A preferred
       stock. All outstanding options and warrants of the Company became
       immediately exercisable and were either exercised or terminated. Upon
       the receipt of the $6 million payment from UCB due in October 1999
       pursuant to the UCB asset purchase agreement (Note 3), the
       stockholders of the Company will receive approximately 631,000
       additional shares of LeukoSite Series A preferred stock. In the event
       that LeukoSite receives milestone payments pursuant to the UCB asset
       purchase agreement or receives the $1 million license fee payment upon
       the execution of the Stiefel license agreement (Note 4) , LeukoSite
       will make additional payments of up to $7.0 million to the
       stockholders of the Company. In addition, in the event that the
       Company's remaining research programs achieve certain milestones,
       LeukoSite will make additional cash payments of up to $16.5 million
       and issue up to approximately 84,000 additional shares of LeukoSite
       Series A preferred stock to the stockholders of the Company.


<PAGE>
                         INDEX TO FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
LEUKOSITE, INC. AND SUBSIDIARY

Report of Independent Public Accountants...................................................................  F-2

Consolidated Balance Sheets as of December 31, 1997 and 1998...............................................  F-3

Consolidated Statements of Operations for the Years Ended December 31, 1996, 1997
  and 1998.................................................................................................  F-4

Consolidated Statements of Stockholders' Equity (Deficit) for the Years Ended
  December 31, 1996, 1997 and 1998.........................................................................  F-5

Consolidated Statements of Cash Flows for the Years Ended December 31, 1996, 1997
  and 1998.................................................................................................  F-6

Notes to Consolidated Financial Statements.................................................................  F-7

L & I PARTNERS, L.P.

Report of Independent Public Accountants...................................................................  F-22

Balance Sheets as of December 31, 1997 and 1998............................................................  F-23

Statements of Operations for the Period from Inception (May 2, 1997) through
  December 31, 1997 and the Year Ended December 31, 1998 and for the Period from Inception (May 2, 1997)
  through December 31, 1998................................................................................  F-24

Statements of Partners' Capital for the Period from Inception (May 2, 1997) through
  December 31, 1998........................................................................................  F-25

Statement of Cash Flows for the Period from Inception (May 2, 1997) through December 31, 1997 and the Year
  Ended December 31, 1998, and for the Period from Inception (May 2, 1997) through December 31, 1998.......  F-26

Notes to Financial Statements..............................................................................  F-27
</TABLE>

                                      F-1
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To LeukoSite, Inc.:

    We have audited the accompanying consolidated balance sheets of LeukoSite,
Inc. (a Delaware corporation) and subsidiary as of December 31, 1997 and 1998,
and the related consolidated statements of operations, stockholders' equity
(deficit) and cash flows for each of the three years in the period ended
December 31, 1998. These consolidated financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these consolidated 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 consolidated financial statements referred to above
present fairly, in all material respects, the financial position of LeukoSite,
Inc. and subsidiary as of December 31, 1997 and 1998, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1998, in conformity with generally accepted accounting principles.

                                          Arthur Andersen LLP

Boston, Massachusetts
January 29, 1999

                                      F-2
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

                          CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                     DECEMBER 31,   DECEMBER 31,
                                                                                         1997           1998
                                                                                     -------------  -------------
<S>                                                                                  <C>            <C>
                                                     ASSETS
Current assets:
  Cash and cash equivalents........................................................  $  10,587,873  $   5,361,339
  Marketable securities............................................................     14,569,100     15,802,376
  Other current assets.............................................................        408,811        544,779
                                                                                     -------------  -------------
    Total current assets...........................................................     25,565,784     21,708,494
                                                                                     -------------  -------------
Property and equipment, at cost:
  Laboratory furniture, fixtures and equipment.....................................      2,703,706      3,761,263
  Leasehold improvements...........................................................      2,409,753      3,561,757
  Office furniture, fixtures and equipment.........................................        298,925        454,427
                                                                                     -------------  -------------
                                                                                         5,412,384      7,777,447
  Less--Accumulated depreciation and amortization..................................     (2,973,095)    (4,383,574)
                                                                                     -------------  -------------
                                                                                         2,439,289      3,393,873
Marketable securities..............................................................             --      2,168,324
Other assets.......................................................................         27,090        231,930
                                                                                     -------------  -------------
    Total assets...................................................................  $  28,032,163  $  27,502,621
                                                                                     -------------  -------------
                                                                                     -------------  -------------
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable.................................................................  $     196,987  $     272,128
  Accrued expenses.................................................................      1,866,423      4,115,301
  Obligation to fund joint venture.................................................      1,770,310        203,445
  Deferred revenue.................................................................      1,161,250      2,172,058
  Deferred rent....................................................................        243,171        222,907
  Current portion of capital lease obligations.....................................        866,835        733,848
                                                                                     -------------  -------------
    Total current liabilities......................................................      6,104,976      7,719,687
                                                                                     -------------  -------------
Deferred rent, net of current portion..............................................        222,907             --
                                                                                     -------------  -------------
Capital lease obligations, net of current portion..................................        896,578      1,315,813
                                                                                     -------------  -------------
Commitments and contingencies (Notes 7, 13, 14 and 15)
Stockholders' equity:
  Preferred stock $.01 par value--Authorized--5,000,000 shares Issued and
    outstanding--no shares.........................................................             --             --
  Common stock, $.01 par value--Authorized--25,000,000 shares Issued and
    outstanding--9,875,741 shares at December 31, 1997 and 11,916,339 shares at
    December 31, 1998..............................................................         98,758        119,164
  Additional paid-in capital.......................................................     53,294,367     65,280,443
  Deficit accumulated during the development stage.................................    (32,585,423)   (46,932,486)
                                                                                     -------------  -------------
  Total stockholders' equity.......................................................     20,807,702     18,467,121
                                                                                     -------------  -------------
  Total liabilities and stockholders' equity.......................................  $  28,032,163  $  27,502,621
                                                                                     -------------  -------------
                                                                                     -------------  -------------
</TABLE>

  THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONSOLIDATED FINANCIAL
                                  STATEMENTS.

                                      F-3
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

                      CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                               YEAR ENDED DECEMBER 31,
                                                                    ---------------------------------------------
<S>                                                                 <C>            <C>             <C>
                                                                        1996            1997            1998
                                                                    -------------  --------------  --------------
Revenues:
  Corporate collaborations........................................  $   3,591,000  $    5,098,345  $   10,020,468
  Joint venture (Note 7)..........................................             --         250,106       1,260,185
  Government grants...............................................         82,770         377,459         791,218
                                                                    -------------  --------------  --------------
    Total revenues................................................      3,673,770       5,725,910      12,071,871
                                                                    -------------  --------------  --------------
Operating expenses:
  Research and development........................................      8,502,187      11,980,233      21,141,587
  General and administrative......................................      1,370,538       1,757,802       2,624,773
                                                                    -------------  --------------  --------------
    Total operating expenses......................................      9,872,725      13,738,035      23,766,360
                                                                    -------------  --------------  --------------
    Loss from operations..........................................     (6,198,955)     (8,012,125)    (11,694,489)
Other income (expense):
  Equity in operations of joint venture...........................             --      (3,357,916)     (3,857,640)
  Interest income.................................................        378,924         865,840       1,367,936
  Interest expense................................................       (201,659)       (146,900)       (162,870)
                                                                    -------------  --------------  --------------
    Net loss......................................................  $  (6,021,690) $  (10,651,101) $  (14,347,063)
                                                                    -------------  --------------  --------------
                                                                    -------------  --------------  --------------
Net loss per common share:
    Basic and diluted.............................................  $       (5.65) $        (2.62) $        (1.32)
                                                                    -------------  --------------  --------------
                                                                    -------------  --------------  --------------
Shares used in computing net loss per common share:
    Basic and diluted.............................................      1,065,522       4,298,828      10,895,411
                                                                    -------------  --------------  --------------
                                                                    -------------  --------------  --------------
</TABLE>

  THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONSOLIDATED FINANCIAL
                                  STATEMENTS.

                                      F-4
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)

<TABLE>
<CAPTION>
                                           CONVERTIBLE
                                         PREFERRED STOCK           COMMON STOCK
                                     -----------------------  -----------------------  ADDITIONAL
                                       NUMBER       $.01        NUMBER       $.01       PAID-IN    ACCUMULATED
                                     OF SHARES    PAR VALUE   OF SHARES    PAR VALUE    CAPITAL      DEFICIT        TOTAL
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
<S>                                  <C>         <C>          <C>         <C>          <C>         <C>           <C>
BALANCE, DECEMBER 31, 1995.........   1,000,000   $  10,000    1,041,099   $  10,411   $3,121,267  ($15,302,632) $(12,160,954)
Issuance of Series E convertible
  preferred stock, net of issuance
  costs of $40,434.................   1,250,000      12,500           --          --    4,947,066           --     4,959,566
Exercise of stock options..........          --          --       45,491         455       31,816           --        32,271
Value ascribed to guaranteed rate
  of return on redeemable
  convertible preferred stock......          --          --           --          --      610,000           --       610,000
Net loss...........................          --          --           --          --           --   (6,021,690)   (6,021,690)
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
BALANCE, DECEMBER 31, 1996.........   2,250,000      22,500    1,086,590      10,866    8,710,149  (21,324,322)  (12,580,807)
Accretion of redeemable convertible
  preferred stock dividends........          --          --           --          --           --     (610,000)     (610,000)
Proceeds from initial public
  offering of common stock, net of
  $745,480 of issuance costs.......          --          --    2,875,000      28,750   15,268,270           --    15,297,020
Conversion of convertible preferred
  stock............................  (2,250,000)    (22,500)     548,780       5,488       17,012           --            --
Conversion of redeemable
  convertible preferred stock......          --          --    4,986,827      49,869   25,293,042           --    25,342,911
Issuance of common stock, net of
  $30,000 of issuance costs........          --          --      336,135       3,361    3,966,639           --     3,970,000
Exercise of stock options..........          --          --       42,409         424       39,255           --        39,679
Net loss...........................          --          --           --          --           --  (10,651,101)  (10,651,101)
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
BALANCE, DECEMBER 31, 1997.........          --          --    9,875,741      98,758   53,294,367  (32,585,423)   20,807,702
Issuance of common stock, net of
  $68,651 of issuance costs........          --          --   1, 967,169      19,672   11,714,691           --    11,734,363
Issuance of common stock under
  Employee Stock Purchase Plan.....          --          --       13,713         137       95,815           --        95,952
Exercise of stock options..........          --          --       59,716         597      175,570           --       176,167
Net loss...........................          --          --           --          --           --  (14,347,063)  (14,347,063)
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
BALANCE, DECEMBER 31, 1998.........          --   $      --   11,916,339   $ 119,164   $65,280,443 ($46,932,486) $18,467,121
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
                                     ----------  -----------  ----------  -----------  ----------  ------------  -----------
</TABLE>

  THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONSOLIDATED FINANCIAL
                                  STATEMENTS.

                                      F-5
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                    YEAR ENDED DECEMBER 31,
                                                                              ------------------------------------
                                                                                 1996        1997         1998
                                                                              ----------  -----------  -----------
<S>                                                                         <C>         <C>          <C>
Cash flows used in operating activities:
  Net loss................................................................  $(6,021,690) $(10,651,101) $(14,347,063)
  Adjustments to reconcile net loss to net cash used in operating
    activities--
    Depreciation and amortization.........................................      908,860     1,019,531     1,466,420
    Gain on sale of equipment.............................................           --            --       (11,746)
    Equity in operations of joint venture.................................           --     3,357,916     3,857,640
    Changes in operating assets and Liabilities--
      Other current assets................................................      (66,270)     (255,032)     (135,968)
      Accounts payable and accrued expenses...............................      431,198       901,312     2,324,019
      Deferred revenue....................................................      261,250       900,000     1,010,808
      Deferred rent.......................................................      234,204      (104,357)     (243,171)
                                                                            -----------   -----------   -----------
        Net cash used in operating activities.............................   (4,252,448)   (4,831,731)   (6,079,061)
                                                                            -----------   -----------   -----------
Cash flows used in investing activities:
  Investment in marketable securities.....................................  (11,741,504)  (21,066,603)  (21,951,502)
  Proceeds from maturities of marketable securities.......................    6,787,602    11,442,960    18,549,902
  Investment in joint venture.............................................           --    (1,587,606)   (5,424,505)
  Purchases of property and equipment.....................................     (184,549)      (48,228)   (1,164,445)
  Proceeds from sale of equipment.........................................           --            --        12,800
  Decrease (increase) in other assets.....................................           --           436      (204,840)
                                                                            -----------   -----------   -----------
        Net cash used in investing activities.............................   (5,138,451)  (11,259,041)  (10,182,590)
                                                                            -----------   -----------   -----------
Cash flows from financing activities:
  Principal payments on capital Leases....................................     (695,226)     (878,067)     (971,365)
  Proceeds from redeemable convertible preferred stock, net of issuance
    costs.................................................................    7,790,607     3,819,506            --
  Proceeds from initial public offering, net of issuance costs............           --    15,297,020            --
  Issuance of common stock, net of issuance costs.........................           --     3,970,000    11,734,363
  Issuance of common stock under the Employee Stock Purchase Plan.........           --            --        95,952
  Exercise of stock options...............................................       32,271        39,679       176,167
  Issuance of convertible preferred stock, net of issuance costs..........    4,959,566            --            --
                                                                            -----------   -----------   -----------
      Net cash provided by financing activities...........................   12,087,218    22,248,138    11,035,117
                                                                            -----------   -----------   -----------
Net increase (decrease) in cash and cash equivalents......................    2,696,319     6,157,366    (5,226,534)
Cash and cash equivalents, beginning of period............................    1,734,188     4,430,507    10,587,873
                                                                            -----------   -----------   -----------
Cash and cash equivalents, end of period..................................  $ 4,430,507   $10,587,873   $ 5,361,339
                                                                            -----------   -----------   -----------
                                                                            -----------   -----------   -----------
Supplemental cash flow information:
  Cash paid during the period for interest................................  $   201,659   $   146,900   $   162,870
                                                                            -----------   -----------   -----------
                                                                            -----------   -----------   -----------
Supplemental disclosure of noncash investing and financing activities:
  Property and equipment acquired under capital lease obligations.........  $   343,927   $ 1,093,691   $ 1,257,613
                                                                            -----------   -----------   -----------
                                                                            -----------   -----------   -----------
</TABLE>

  THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONSOLIDATED FINANCIAL
                                  STATEMENTS.

                                      F-6
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1) THE COMPANY

    LeukoSite, Inc. (the Company) was incorporated on May 1, 1992. The Company
is engaged in the development of small molecule and monoclonal antibody
therapeutics with potential applications in inflammatory, autoimmune, and viral
diseases and cancer.

    The Company was considered to be in the development stage for financial
reporting purposes until December 1998. During 1998, the Company experienced
significant revenue growth, including revenue from its joint venture with Ilex
(as discussed in Note 7), entered into several new collaboration agreements (see
Note 4 and Note 9) and subsequent to year-end acquired all of the issued and
outstanding capital stock of CytoMed, Inc. (see Note 21). As such, the Company
no longer reports cumulative results from inception as required for development
stage enterprises.

    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenue and expenses during the reporting
period. Actual results could differ from those estimates.

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(A) PRINCIPLES OF CONSOLIDATION

    The accompanying consolidated financial statements include the accounts of
the Company and its wholly owned subsidiary. All material intercompany accounts
and transactions have been eliminated in consolidation.

(B) DEPRECIATION AND AMORTIZATION

    The Company provides for depreciation and amortization using the
straight-line method by charges to operations in amounts estimated to allocate
the cost of property and equipment over their estimated useful lives as follows:

<TABLE>
<CAPTION>
                                                                                  ESTIMATED
ASSET CLASSIFICATION                                                             USEFUL LIVES
- ------------------------------------------------------------------------------  --------------
<S>                                                                             <C>
Laboratory furniture, fixtures and equipment..................................  4-5 years
Laboratory and office computer equipment......................................  3 years
Leasehold improvements........................................................  Life of lease
Office furniture, fixtures and equipment......................................  4-5 years
</TABLE>

(C) REVENUE RECOGNITION

    All of the Company's revenues are non-refundable and are substantially
derived from corporate collaborative research arrangements, government grants
and amounts billed to the Company's joint venture with Ilex, as discussed in
Note 7. Corporate collaboration revenues and government grants, which are not
subject to achieving development milestones, are recognized on a straight-line
basis over the period of the contract, which approximates when work is performed
and costs are incurred. Revenues that are earned upon the achievement of
development milestones are recognized when the milestones are achieved and
payment is due. License fee revenue represents technology transfer fees received
for rights to certain technology of the Company. License fees are recognized as
revenue when all obligations as defined in the

                                      F-7
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
individual agreements are fulfilled by the Company and there is no risk of
refund. Deferred revenue represents payments received in advance of revenue
recognition.

(D) RESEARCH AND DEVELOPMENT

    All research and development costs are expensed as incurred. Funding
commitments are recorded as a liability when they become contractually due.
Research and development expenses in the accompanying consolidated statements of
operations include funded and unfunded expenses.

(E) DISCLOSURE OF FAIR VALUE OF FINANCIAL INSTRUMENTS

    The Company's financial instruments consist mainly of cash and cash
equivalents, marketable securities and accounts payable. The carrying amounts of
these financial instruments approximate fair value due to the short-term nature
of these instruments.

(F) NET LOSS PER COMMON SHARE

    In March 1997, the Financial Accounting Standards Board (FASB) issued
Statement of Financial Accounting Standards (SFAS) No. 128, EARNINGS PER SHARE.
The Company adopted SFAS No. 128 effective December 15, 1997. Basic net loss is
based on the weighted average number of common shares outstanding. The 1997 net
loss available to common stockholders has been adjusted to include $610,000 of
dividends attributable to redeemable convertible preferred stock. Diluted net
loss per share is the same as basic net loss per share as the inclusion of stock
options and warrants would be antidilutive.

<TABLE>
<CAPTION>
                                                                DECEMBER 31,
                                                ---------------------------------------------
                                                    1996            1997            1998
                                                -------------  --------------  --------------
<S>                                             <C>            <C>             <C>
Net loss......................................  $  (6,021,690) $  (10,651,101) $  (14,347,063)
Accretion of preferred stock dividends........             --        (610,000)             --
                                                -------------  --------------  --------------
Net loss applicable to common stockholders....  $  (6,021,690) $  (11,261,101) $  (14,347,063)
                                                -------------  --------------  --------------
                                                -------------  --------------  --------------
Net loss per common share--basic and
  diluted.....................................  $       (5.65) $        (2.62) $        (1.32)
                                                -------------  --------------  --------------
                                                -------------  --------------  --------------
Weighted average common shares
  outstanding--basic and diluted..............      1,065,522       4,298,828      10,895,411
                                                -------------  --------------  --------------
                                                -------------  --------------  --------------
Antidilutive securities that were not
  included--common stock options and
  warrants....................................        429,087         467,698         560,004
                                                -------------  --------------  --------------
                                                -------------  --------------  --------------
</TABLE>

(3) CASH EQUIVALENTS AND MARKETABLE SECURITIES

    Cash equivalents are highly liquid investments with original maturities of
less than three months. Marketable securities consist of securities with
original maturities of greater than three months. The Company accounts for cash
equivalents and marketable securities in accordance SFAS No. 115, ACCOUNTING FOR
CERTAIN INVESTMENTS IN DEBT AND EQUITY SECURITIES. In accordance with SFAS No.
115, the Company has classified its investments as held-to-maturity. The
investments that the Company has the positive intent

                                      F-8
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(3) CASH EQUIVALENTS AND MARKETABLE SECURITIES (CONTINUED)
and ability to hold to maturity are reported at amortized cost, which
approximates fair market value. As of December 31, 1998, there were no material
unrealized gains or losses on investments. Cash and cash equivalents and
marketable securities consisted of the following:

<TABLE>
<CAPTION>
                                                         DECEMBER 31, 1997  DECEMBER 31, 1998
                                                         -----------------  -----------------
<S>                                                      <C>                <C>
Cash and cash equivalents:
  Cash.................................................    $   1,373,786      $   3,219,315
  Money market funds...................................        6,609,783          1,341,651
  Taxable auction securities...........................        2,604,304            800,373
                                                         -----------------  -----------------
                                                           $  10,587,873      $   5,361,339
                                                         -----------------  -----------------
                                                         -----------------  -----------------
Marketable securities, short-term:
  U.S. government agency obligations (average maturity
    of 5 months).......................................    $   6,094,401      $          --
  Corporate bonds and notes (average Maturity of 5 and
    6 months respectively).............................        8,474,699         15,802,376
                                                         -----------------  -----------------
                                                           $  14,569,100      $  15,802,376
                                                         -----------------  -----------------
                                                         -----------------  -----------------
Marketable securities, long-term:
  Corporate bonds and notes (average Maturity of 15.5
    months)............................................    $          --      $   2,168,324
                                                         -----------------  -----------------
                                                         -----------------  -----------------
</TABLE>

    Taxable auction securities have maturities of either seven, twenty-eight, or
thirty-five days and the yields on these instruments are reset upon maturity by
utilizing the Dutch Auction or remarketing mechanisms. New and existing
investors reset the rates through a competitive bidding process that reflects
factors such as the current interest rate environment, comparable yields
available in alternative short-term cash instruments and the credit quality of
the issuer.

(4) WARNER-LAMBERT AGREEMENTS

    The Company and Warner-Lambert Company (Warner) have entered into research,
development and marketing agreements to share expertise in the discovery and
development of compounds that antagonize the MCP-1, IL-8, CCR5 and CXCR4
receptors and A4B7 and AEB7 integrins and to market therapeutic drugs that
result from the collaboration.

    The Company and Warner signed an agreement related to MCP-1 in September
1994 that was amended in July 1995 and October 1997 (the MCP-1 Agreement). Under
the MCP-1 Agreement, the Company and Warner are working to screen and select
compounds for further development. In conjunction with the MCP-1 Agreement,
Warner agreed to purchase preferred stock at a predetermined share price and to
fund a portion of the Company's research expenses. Warner purchased $3,000,000
of Series C convertible preferred stock in 1995 and $5,000,000 of Series E
convertible preferred stock in 1996.

    The Company and Warner signed an agreement related to IL-8 in July 1995 that
was amended in October 1997 (the IL-8 Agreement). Under the IL-8 Agreement, the
Company and Warner are working to screen and select compounds for further
development. In connection with the IL-8 Agreement, Warner paid the Company
$250,000 for the grant of a license to the technology and made a $1,000,000
equity investment in the Series G preferred stock in March 1997.

                                      F-9
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(4) WARNER-LAMBERT AGREEMENTS (CONTINUED)
    The Company and Warner signed an agreement related to CCR5 and CXCR4 in
October 1996 (the CCR5 and CXCR4 Agreement). Under the CCR5 and CXCR4 Agreement,
the Company and Warner are working to discover and develop small molecule
antagonists to AIDS chemokine co-receptors CCR5 and CXCR4 for the treatment of
HIV infection. This agreement was extended in January 1998, at which time Warner
made a nonrefundable $1,000,000 payment related to the achievement of certain
milestones.

    Under the terms of the October 1997 amendment to the MCP-1 and IL-8
agreements, the Company, Warner and Kyowa Hakko Kogyo (Kyowa) have agreed to
jointly pursue research and development of antagonists that target MCP-1, IL-8,
CCR1 and CXCR3.

    The Company and Warner signed an agreement related to A4B7 and AEB7 in
December 1998 (the A4B7 and AEB7 Agreement). Under the A4B7 and AEB7 Agreement,
the Company and Warner are working to discover and develop small molecule
atagonists to the A4B7 and AEB7 integrin targets implicated in asthma and
inflammatory bowel disease. In connection with the A4B7 and AEB7 Agreement,
Warner made a nonrefundable $2,500,000 payment for the grant of a license to the
technology and agreed to provide research funding.

    The Company received quarterly research funding under the MCP-1 and IL-8
Agreements and the A4B7 and AEB7 Agreement. Through December 31, 1998, the
Company had received $3,831,250 in research support. Revenue recognized for
research support during the years ended December 31, 1996, 1997 and 1998 was
$690,000, $1,035,000 and $1,021,667, respectively, and as of December 31, 1998,
the Company has deferred recognizing $834,583 as revenue. The MCP-1, IL-8, CCR5
and CXCR4, and A4B7 and AEB7 Agreements (the Warner Agreements) also contain
milestone payments payable to the Company beginning upon the designation of a
product candidate for development. In addition, under the Warner Agreements,
Warner will pay royalties as a percentage of sales, as defined, for certain
products developed under the agreements. Warner waived its antidilution rights
relating to the Series C, E and G preferred stock, which was converted into
common stock in August 1997, in exchange for a credit against future royalties,
if any become payable, under the MCP-1 and IL-8 Agreements and the Kyowa
Agreement discussed in Note 6. The approximate amount of such credit is
$3,900,000. The Warner Agreements can be terminated by either party with six
months' written notice or for cause, as defined.

(5) ROCHE BIOSCIENCE AGREEMENT

    The Company signed an agreement with Roche Bioscience (Roche) for the
development of a drug to block the binding of eotoxin in July 1996. Under the
terms of this agreement, Roche will make payments to the Company in the form of
licensing fees, research support and milestone payments and royalties on
worldwide sales of products resulting from the collaboration. Through December
31, 1998, the Company had received $7,062,500 in licensing and research support
payments from Roche. Revenue recognized for the years ended December 31, 1996,
1997 and 1998 was $2,900,000, $2,100,000 and $1,925,000, respectively, and as of
December 31, 1998, the Company has deferred recognizing $137,500 as revenue.
Roche is responsible for preclinical and clinical development of products and
has worldwide exclusive rights to market products.

(6) KYOWA HAKKO KOGYO AGREEMENT

    The Company signed an agreement with Kyowa to discover and develop small
molecule antagonists and monoclonal antibody drugs to CXCR3 and CCR1 in April
1997. The agreement was amended in October 1997. Under the terms of the amended
agreement, Kyowa has primary rights to market products

                                      F-10
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(6) KYOWA HAKKO KOGYO AGREEMENT (CONTINUED)
in Japan and Asia resulting from the collaboration. Furthermore, the amended
agreement calls for the Company, together with Warner and Kyowa to jointly
develop antagonists that target MCP-1, IL-8, CXCR3 and CCR1. The Company is
entitled to receive research support and milestone payments, as well as
royalties based on net sales, as defined. Through December 31, 1998, the Company
had received $7,000,000 of research funding from Kyowa. Revenue recognized for
the years ended December 31, 1997 and 1998 was $2,100,000 and $3,300,000,
respectively, and as of December 31, 1998, the Company has deferred recognizing
$1,200,000 as revenue.

(7) ILEX AGREEMENT

    In May 1997, the Company and Ilex Oncology, Inc. (Ilex) entered into a joint
venture agreement that established a limited partnership for the purpose of
developing CAMPATH-Registered Trademark-. Under the terms of the partnership,
the Company is required to fund 50% of the partnership's working capital
requirements. The joint venture expires in 2017, but provides for either partner
under certain circumstances to purchase the other partner's ownership position
of the joint venture after October 2000. Should either party fail to fulfill its
funding obligations, control of the joint venture may change.

    The Company accounts for its investment in the joint venture under the
equity method of accounting and records its share of the income of loss in other
income (expense). The Company is reimbursed by the joint venture for certain
costs incurred on behalf of the joint venture. The joint venture has sublicensed
the rights to CAMPATH-Registered Trademark- from the Company. For the years
ended December 31, 1997 and 1998, the Company's share of the joint venture's
recorded loss was $3,357,916 and $3,857,640, respectively, and the Company had a
funding liability of $203,445 to the joint venture as of December 31, 1998. The
Company charged the joint venture $1,235,185 and $250,106 for costs incurred by
the Company on behalf of the joint venture for the year ended December 31, 1998
and December 31, 1997, respectively, which has been recorded as revenue by the
Company. During 1998, the joint venture made a nonrefundable $25,000 payment to
the Company for the license to the rights of CAMPATH-Registered Trademark-,
which has been recorded as revenue by the Company.

(8) GENENTECH

    The Company entered into an agreement with Genentech, Inc. (Genentech) in
December 1997 to develop and commercialize LDP-02, a humanized monoclonal
antibody for the treatment of inflammatory bowel disease (IBD). Under the terms
of the agreement Genentech will have exclusive worldwide rights to market
LDP-02. In connection with the agreement, Genentech made a $4,000,000 equity
investment in the Company and was issued warrants to purchase 250,000 shares of
common stock at an exercise price of $16.22 per share. The agreement calls for
payments to be made to the Company for the achievement of certain milestones as
well as future royalty payments based upon the sale of products developed under
the collaboration. In addition, Genentech will provide two credit facilities.
The first facility will be for approximately $15 million and will fund
development of products through completion of Phase II clinical trials. The
second facility will be available to the Company if it agrees to fund 25% of the
Phase III clinical trial development costs in return for a specified share of
profits on U.S. sales of any products developed under the agreement, as defined.
If the Company elects this option, it will also receive royalties on products
sold outside of the U.S. The two credit facilities can be repaid by the Company
or converted into shares of common stock under certain circumstances, at the
option of the Company or Genentech, at the market value of the common stock at
the date of conversion. No funds have been drawn against the credit facilities
for the years ended December 31, 1997 and 1998.

                                      F-11
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(9) MORPHOSYS

    The Company entered into a two-year collaboration agreement with MorphoSys
AG (MorphoSys) in August 1998 to discover and develop therapeutic monoclonal
antibodies for inflammatory and autoimmune disorders. Under the terms of the
agreement, the Company received exclusive worldwide rights to develop and
commercialize antibody therapeutics resulting from the collaboration. The
Company made a technology access fee payment in August 1998 of $750,000, which
has been included in research and development expense. The agreement calls for
payments to be made to MorphoSys for funded research, the achievement of certain
milestones as well as future royalties, based upon commercial sales of products
developed under the collaboration.

(10) CAPITAL LEASE

    In 1993, the Company entered into a master lease agreement for the sale and
leaseback or lease of up to $2,250,000 of laboratory and office equipment and
leasehold improvements. At December 31, 1998, the Company had acquired
approximately $2,130,000 of laboratory and office equipment and leasehold
improvements under the lease agreement. The Company also has an obligation to
purchase $750,000 of leasehold improvements at the expiration of the lease term
for 15% of its original cost. The Company issued warrants for the purchase of
210,000 shares of Series A redeemable convertible preferred stock at an exercise
price of $1.00 per share to the lessors under the master lease agreement (see
Note 13(b)).

    In 1994, the Company entered into a second master equipment lease agreement
for the lease of up to $750,000 of laboratory and office equipment. At December
31, 1998, the Company had acquired approximately $730,000 of equipment under the
lease. The leased equipment reverts back to the lessor at the end of the lease
term or the Company may purchase all of the equipment for fair market value,
which will not be less than 10% or more than 20% of the cost of the equipment.
On January 18, 1996, this agreement was amended to provide an additional
$300,000 of lease availability.

    On March 14, 1997, the Company entered into another lease agreement for the
lease of up to $1,200,000 of laboratory and office equipment, of which $450,000
may be utilized for leasehold improvements. The leased equipment reverts back to
the lessor at the end of the lease term or the Company may purchase all of the
equipment for fair market value, which will not be less than 10% or more than
20% of the cost of the equipment. On May 7, 1998, this agreement was amended to
provide an additional $1,200,000 of lease availability. As of December 31, 1998,
$1,010,000 is available under this lease commitment.

    On March 26, 1998, the Company entered into another lease agreement for the
lease of up to $500,000 of laboratory and office equipment. The leased equipment
reverts back to the lessor at the end of the lease term or the Company may
purchase all of the equipment for fair market value, which will not be less than
10% or more than 15% of the cost of the equipment. As of December 31, 1998,
$500,000 is available under this lease commitment.

    On June 12, 1998, the Company entered into another lease agreement for the
lease of up to $1,300,000 of laboratory and office equipment, of which $455,000
may be utilized for leasehold improvements. The leased equipment reverts back to
the lessor at the end of the lease term or the Company may purchase all of the
equipment for fair market value, which will not be less than 10% or more than
20% of the cost of the equipment. As of December 31, 1998, $620,000 is available
under this lease commitment.

                                      F-12
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(10) CAPITAL LEASE (CONTINUED)
    Future minimum lease payments under these lease agreements at December 31,
1998 are as follows:

<TABLE>
<CAPTION>
                                                                                     AMOUNT
                                                                                  ------------
<S>                                                                               <C>
Year Ending December 31,
  1999..........................................................................  $    883,933
  2000..........................................................................       790,774
  2001..........................................................................       427,161
  2002..........................................................................       227,413
                                                                                  ------------
    Total.......................................................................     2,329,281
  Less--Amount representing interest............................................       279,620
                                                                                  ------------
    Present value of future lease payments......................................     2,049,661
  Less--Amounts due within one year.............................................       733,848
                                                                                  ------------
    Amounts due after one year..................................................  $  1,315,813
                                                                                  ------------
                                                                                  ------------
</TABLE>

(11) CAPITAL STOCK

(A) STOCK SPLIT AND AMENDMENT TO CHARTER

    On August 8, 1997, the Company amended its Restated Certificate of
Incorporation, which included a 1-for-4.10 reverse stock split of the Company's
common stock and a change in the par value of the Company's common stock to $.01
per share. Accordingly, all share and per share amounts of common stock for all
periods presented have been retroactively adjusted to reflect the reverse stock
split and change in par value. The Company is authorized to issue 25,000,000
shares of common stock, $.01 par value, and 5,000,000 shares of preferred stock,
$.01 par value.

(B) INITIAL PUBLIC OFFERING

    On August 15, 1997, the Company completed the initial public offering of
2,875,000 shares of its common stock at $6 per share, for total net proceeds of
$15.3 million after underwriting discounts and expenses of the offering. In
connection with the public offering, all outstanding shares of redeemable
convertible preferred stock and convertible preferred stock were automatically
converted into 5,535,607 shares of common stock.

                                      F-13
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(12) PREFERRED STOCK

(A) REDEEMABLE CONVERTIBLE PREFERRED STOCK

    Redeemable convertible preferred stock activity for the two years in the
period ended December 31, 1997 is as follows:
<TABLE>
<CAPTION>
                                       SERIES A                SERIES B                SERIES D                SERIES F
                                ----------------------   ---------------------   ---------------------  ----------------------
<S>                            <C>         <C>         <C>         <C>          <C>        <C>          <C>         <C>
                                 NUMBER      CARRYING     NUMBER     CARRYING     NUMBER     CARRYING    NUMBER      CARRYING
                                OF SHARES     VALUE      OF SHARES    VALUE      OF SHARES    VALUE     OF SHARES     VALUE
                                ----------  ----------   ---------  ----------   ---------  ----------  ---------   ----------

Balance, December 31, 1995...   10,000,000  $9,855,261   1,666,667  $1,926,629   1,481,482  $1,950,908         --   $       --

Issuance of Series F
  preferred stock, net of
  issuance costs of
  $34,838....................           --          --          --          --          --          --   1,638,335   4,880,607

Issuance of Series G
  preferred stock, net of
  issuance costs of
  $90,000....................           --          --          --          --          --          --          --          --

Value ascribed to guaranteed
  rate of return on
  redeemable convertible
  preferred stock............           --          --          --          --          --          --          --          --
                                ----------  ----------   ---------  ----------   ---------  ----------   ---------  ----------

Balance, December 31, 1996...   10,000,000   9,855,261   1,666,667   1,926,629   1,481,482   1,950,908   1,638,335   4,880,607

Issuance of Series G
  preferred stock, net of
  issuance costs of
  $40,000....................           --          --          --          --          --          --          --          --

Accretion of redeemable
  convertible Preferred stock
  dividend...................           --          --          --          --          --          --          --          --

Conversion of redeemable
  convertible preferred
  stock......................  (10,000,000) (9,855,261) (1,666,667) (1,926,629) (1,481,482) (1,950,908) (1,638,335) (4,880,607)
                               -----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------

Balance, December 31, 1997...           --  $       --          --  $       --          --  $       --          --  $       --
                               -----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------
                               -----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------

<CAPTION>
                                     SERIES G
                               ---------------------
<S>                            <C>        <C>
                                NUMBER     CARRYING
                               OF SHARES    VALUE
                               ---------  ----------
Balance, December 31, 1995...         --  $       --
Issuance of Series F
  preferred stock, net of
  issuance costs of
  $34,838....................         --          --
Issuance of Series G
  preferred stock, net of
  issuance costs of
  $90,000....................    857,143   2,910,000
Value ascribed to guaranteed
  rate of return on
  redeemable convertible
  preferred stock............         --    (610,000)
                               ---------  ----------
Balance, December 31, 1996...    857,143   2,300,000
Issuance of Series G
  preferred stock, net of
  issuance costs of
  $40,000....................  1,102,719   3,819,506
Accretion of redeemable
  convertible Preferred stock
  dividend...................         --     610,000
Conversion of redeemable
  convertible preferred
  stock...................... (1,959,862) (6,729,506)
                              ----------  ----------
Balance, December 31, 1997...         --  $       --
                               ---------  ----------
                               ---------  ----------
</TABLE>

    As discussed in Note 11(b), upon completion of the Company's initial public
offering, all outstanding shares of redeemable convertible preferred stock were
automatically converted into 4,986,827 shares of common stock.

    The Company also had a separate agreement with certain Series G shareholders
whereby their shares were converted into common stock based upon a specific rate
of return on their original investment, as defined. The Company recorded the
value attributed to the guaranteed rate of return (based on an original
investments of $3,000,000, an annual rate of return of 33% and an estimated
period of approximately 7.5 months before conversion into common stock) as
additional paid-in capital and accreted it as a preferred stock dividend over
the estimated period that the stock was outstanding. The Company recorded
$610,000 of such accretion through December 31, 1997.

(13) STOCK OPTIONS AND WARRANTS

(A) STOCK OPTIONS

    The Company has adopted the 1993 Stock Option Plan (the Plan) under which it
may grant both incentive stock options and nonstatutory stock options. The Plan
provides for the granting of options to purchase up to 2,125,000 shares of
common stock. As of December 31, 1998, 352,720 shares are available for future
grant under the Plan. To date, all options granted have been issued with an
exercise price equal to the fair market value at the time of issuance.

                                      F-14
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(13) STOCK OPTIONS AND WARRANTS (CONTINUED)
    The Company's 1997 Employee Stock Purchase Plan authorizes a total of up to
150,000 shares of the Company's common stock to be sold to participating
employees. Participating employees may purchase shares of common stock at 85% of
its fair market value at the beginning or end of an offering period, whichever
is lower, through payroll deductions in an amount not to exceed 8% of an
employee's base compensation.

    During 1993, the Company granted a stock option to purchase 135,000 shares
of Series A redeemable convertible preferred stock at $1.00 per share pursuant
to a stock restriction agreement with a consultant. Upon conversion of the
Series A redeemable convertible preferred stock into common stock as discussed
in Note 11(b), the option holder is now entitled to purchase 32,927 shares of
common stock at an exercise price of $4.10 per share. This option expires on
August 15, 2002.

    The Company had the following common stock option activity for the three
years end December 31, 1998:

<TABLE>
<CAPTION>
                                                                 OPTION
                                                    NUMBER        PRICE       WEIGHTED AVERAGE
                                                  OF SHARES     PER SHARE      EXERCISE PRICE
                                                  ----------  -------------  -------------------
<S>                                               <C>         <C>            <C>
Balance, December 31, 1995......................     468,776  $    .04-1.19          $  .74
  Granted.......................................     324,356      1.19-6.15            5.37
  Exercised.....................................     (45,491)      .04-1.19             .70
  Canceled......................................     (15,212)      .82-5.13            2.30
                                                  ----------  -------------             ---
Balance, December 31, 1996......................     732,429  $    .04-6.15          $ 2.75
  Granted.......................................     633,008     6.12-11.13            8.46
  Exercised.....................................     (42,409)      .04-6.15             .93
  Canceled......................................     (48,509)      .69-7.17            4.45
                                                  ----------  -------------             ---
Balance, December 31, 1997......................   1,274,519  $   .04-11.13          $ 5.50
  Granted.......................................     469,403     6.56-13.00            9.29
  Exercised.....................................     (59,716)      .04-7.17            2.98
  Canceled......................................     (84,908)     .94-11.13            7.98
                                                  ----------  -------------             ---
Balance, December 31, 1998......................   1,599,298  $   .04-13.00          $ 6.66
                                                  ----------  -------------             ---
                                                  ----------  -------------             ---
Exercisable December 31, 1996...................     197,767  $    .04-2.62          $  .66
                                                  ----------  -------------             ---
                                                  ----------  -------------             ---
Exercisable December 31, 1997...................     336,805  $    .04-7.17          $ 1.70
                                                  ----------  -------------             ---
                                                  ----------  -------------             ---
Exercisable December 31, 1998...................     585,644  $   .04-11.13          $ 3.71
                                                  ----------  -------------             ---
                                                  ----------  -------------             ---
</TABLE>

                                      F-15
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(13) STOCK OPTIONS AND WARRANTS (CONTINUED)

<TABLE>
<CAPTION>
                                     OUTSTANDING                                    EXERCISABLE
                ------------------------------------------------------  ------------------------------------
<S>             <C>                <C>                <C>               <C>                <C>
                                   WEIGHTED AVERAGE
                                       REMAINING      WEIGHTED AVERAGE                     WEIGHTED AVERAGE
EXERCISE PRICE  NUMBER OF SHARES     CONTRACT LIFE     EXERCISE PRICE   NUMBER OF SHARES    EXERCISE PRICE
- --------------  -----------------  -----------------  ----------------  -----------------  -----------------
      $.04-.94         279,460              5.03         $      .65            279,460         $     .65
     1.00-2.62          60,240              6.68               1.17             42,552              1.18
     5.12-6.75         410,555              7.99               5.85            145,667              5.69
     7.13-8.88         294,073              8.85               7.59             70,592              7.72
    9.00-10.75         383,820              9.74              10.04             12,379             10.36
   11.13-13.00         171,150              9.91              11.17             34,994             11.13
                -----------------          -----            -------            -------             -----
                     1,599,298              8.21         $     6.66            585,644         $    3.71
                -----------------          -----            -------            -------             -----
                -----------------          -----            -------            -------             -----
</TABLE>

    In October 1995, the FASB issued SFAS No. 123, ACCOUNTING FOR STOCK-BASED
COMPENSATION. SFAS No. 123 requires the measurement of the fair value of stock
options or warrants granted to employees to be included in the statement of
operations or disclosed in the notes to financial statements. The Company has
determined that it will continue to account for stock-based compensation for
employees under Accounting Principles Board Opinion No. 25 and elect the
disclosure-only alternative under SFAS No. 123. The Company has computed the pro
forma disclosures required under SFAS No. 123 for options granted in 1996, 1997
and 1998 using the Black-Scholes option pricing model prescribed by SFAS No.
123. The assumptions used for the years ended December 31, 1996, 1997 and 1998
are as follows:

<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                        ----------------------------------------------------
<S>                                     <C>               <C>               <C>
                                              1996              1997              1998
                                        ----------------  ----------------  ----------------
Risk-free interest rate...............    5.54%-6.83%       5.83%-6.86%       4.46%-5.57%
Expected dividend yield...............         0%                0%                0%
Expected life.........................      7 years           7 years           7 years
Expected volatility...................        33%               60%               46%
</TABLE>

    The Black-Scholes option-pricing model was developed for use in estimating
the fair value of traded options that have no vesting restrictions and are fully
transferable. In addition, option-pricing models require the input of highly
subjective assumptions including expected stock price volatility. Because the
Company's employee stock options have characteristics significantly different
from those of traded options, and because changes in the subjective input
assumptions can materially affect the fair value estimate, in management's
opinion, the existing models do not necessarily provide a reliable single
measure of the fair value of its employee stock options.

    The total value of the options granted during the years ended 1996, 1997 and
1998 was computed as approximately $867,000, $3,561,000 and $2,338,000,
respectively. Of these amounts, approximately $99,000, $458,000 and $1,179,000
would be charged to operations for the years ended December 31, 1996, 1997 and
1998, respectively. The remaining amount would be amortized over the related
vesting periods. The resulting pro forma compensation expense may not be
representative of the amount to be expected in future years, as pro forma
compensation expense may vary based upon the number of options granted and the
assumptions used in valuing these options.

    The pro forma net loss and pro forma net loss per common share presented
below have been computed assuming no tax benefit. The effect of a tax benefit
has not been considered since a substantial

                                      F-16
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(13) STOCK OPTIONS AND WARRANTS (CONTINUED)
portion of the stock options granted are incentive stock options and the Company
does not anticipate a future deduction associated with the exercise of these
stock options. The pro forma effect of SFAS No. 123 for the years ended December
31, 1996, 1997 and 1998 is as follows:

<TABLE>
<CAPTION>
                                                                          DECEMBER 31,
                                   -----------------------------------------------------------------------------------------
                                               1996                            1997                         1998
                                   ----------------------------     --------------------------    --------------------------
                                                        PRO             AS                           AS              PRO
                                   AS REPORTED         FORMA         REPORTED       PRO FORMA      REPORTED         FORMA
                                   -----------       ----------     -----------    -----------    -----------    -----------
<S>                                <C>               <C>             <C>            <C>            <C>             <C>
Net loss.........................  ($6,021,690)     $(6,121,057)   $(10,651,101)  $(11,109,101)  $(14,347,063)  $(15,525,781)
                                   -----------      -----------    ------------   ------------   ------------   ------------
                                   -----------      -----------    ------------   ------------   ------------   ------------
Basic and diluted net loss per
  common share...................   $    (5.65)     $     (5.74)   $      (2.62)  $      (2.73)  $      (1.32)  $      (1.42)
                                   -----------      -----------    ------------   ------------   ------------   ------------
                                   -----------      -----------    ------------   ------------   ------------   ------------
</TABLE>

(B) WARRANTS

    In connection with the issuance of the Company's Series G redeemable
convertible preferred stock, the Company granted warrants to purchase shares of
common stock. The total number of shares issuable upon exercise of the warrants
and the exercise price will be determined once the Company completes its first
firm commitment underwritten public offering in which the net proceeds to the
Company are at least $17,500,000 (the Designated Public Offering). The warrants
shall become exercisable only if the Designated Public Offering occurs after
December 20, 2000. If the Designated Public Offering occurs on or prior to
December 20, 2000, the warrants shall become null and void. The warrants are
exercisable beginning on the later of (i) the date of the closing of the
Designated Public Offering after December 20, 2000 or (ii) the date of closing
in connection with, or expiration of, the underwriters' overallotment option in
connection with the Designated Public Offering. The warrants expire on the
earlier of (i) the date of closing of the Designated Public Offering provided
the closing occurs on or prior to December 20, 2000 or (ii) December 20, 2003.

    In conjunction with the Company's master lease agreement (see Note 10), the
Company issued warrants for the purchase of 210,000 shares of Series A
redeemable convertible preferred stock at an exercise price of $1.00 per share.
Upon conversion of the Series A redeemable convertible preferred stock into
common stock as discussed in Note 11(b), the warrantholder became entitled to
purchase 51,220 shares of common stock at an exercise price of $4.10 per share.
The warrants are fully exercisable and expire on August 15, 2002. The value
assigned to the warrants, $90,500, is being accounted for as debt discount and
is being amortized over the lease period.

    In conjunction with the Company's agreement with Genentech (see Note 8), the
Company issued warrants to purchase 250,000 shares of common stock at an
exercise price of $16.22 per share. The warrants are exercisable on December 18,
1999 and expire on December 18, 2007.

                                      F-17
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(14) OPERATING LEASE

    In December 1994, the Company entered into an operating lease for its office
and research facilities. The lease expires in December 1999 with an option to
renew for two additional five-year terms. On September 1, 1998, the term of the
lease was extended for an additional period commencing as of December 1, 1999
and expiring as of November 30, 2004. The Company has received certain rent
concessions during the initial term of the lease. Rent expense is being
recognized ratably over the term of the lease. Deferred rent included in the
accompanying consolidated balance sheet represents the difference between cash
paid to date and rent expense recognized to date. Rent expense for 1996, 1997
and 1998 amounted to approximately $459,000, $459,000 and $741,000 respectively.

    Future minimum rental payments at December 31, 1998 are as follows:

<TABLE>
<CAPTION>
                                                                                     AMOUNT
                                                                                  ------------
<S>                                                                               <C>
Year Ending December 31,
1999............................................................................  $  1,724,281
2000............................................................................     1,294,243
2001............................................................................     1,294,243
2002............................................................................     1,294,243
2003............................................................................     1,294,243
2004............................................................................     1,186,389
                                                                                  ------------
                                                                                  $  8,087,642
                                                                                  ------------
                                                                                  ------------
</TABLE>

(15) INCOME TAXES

    The Company follows the provisions of SFAS No. 109, ACCOUNTING FOR INCOME
TAXES, whereby a deferred tax asset or liability is measured by the enacted tax
rates that would be in effect when any differences between the financial
statement and tax bases of assets or liabilities reverse. The Company has
elected to defer the deduction of certain research and development costs, as
defined in the Internal Revenue Code. As of December 31, 1998, the Company has
available deferred research and development costs of approximately $29,105,000,
net operating loss carryforwards of approximately $13,800,000 and research and
development credit carryforwards of approximately $1,300,000 to reduce future
federal income taxes, if any. The net operating loss and credit carryforwards
expire beginning in the year 2007 and are subject to review and possible
adjustment by the Internal Revenue Service. Because of the uncertainty

                                      F-18
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(15) INCOME TAXES (CONTINUED)
of the realization of future tax return benefits of the deferred tax assets, a
full valuation allowance has been provided.

<TABLE>
<CAPTION>
                                                                     1997            1998
                                                                --------------  --------------
<S>                                                             <C>             <C>
Operating loss carryforwards..................................  $    1,902,000  $    5,502,000
Tax credit carryforwards......................................         900,000       1,300,000
Start-up costs................................................         160,000         180,000
Development costs.............................................       9,905,000      12,374,000
Nondeductible accruals........................................          84,000         102,000
Depreciation..................................................         189,000         375,000
                                                                --------------  --------------
                                                                    13,140,000      19,833,000
Less--Valuation allowance.....................................     (13,140,000)    (19,833,000)
                                                                --------------  --------------
                                                                --------------  --------------
                                                                $           --  $           --
                                                                --------------  --------------
                                                                --------------  --------------
</TABLE>

    The United States Tax Reform Act of 1986 contains provisions that may limit
the Company's net operating loss and credit carryforwards available to be used
in any given year in the event of significant changes in the ownership interests
of significant stockholders. The Company has completed numerous financings since
its inception and has incurred ownership changes, as defined in the Tax Reform
Act of 1986. The Company believes that the ownership changes will not
significantly impact its ability to utilize its net operating loss and tax
credit carryforwards.

(16) COMMITMENTS

(A) RESEARCH, LICENSE AND CONSULTING AGREEMENTS

    The Company has entered into various research, license and consulting
agreements to support its research and development activities. These agreements
generally expire over several years. Certain of such agreements contain
provisions for future royalties to be paid on sales of products developed under
the agreements. The Company also has commitments to fund research and
development under arrangements discussed in Notes 7 and 16(b).

    Future minimum commitments under research, license and consulting
agreements, excluding any funding related to the Ilex joint venture discussed in
Note 7, at December 31, 1998 are approximately as follows:

<TABLE>
<S>                                                               <C>
1999............................................................  $1,805,000
2000............................................................     288,000
2001............................................................      25,000
                                                                  ----------
Total...........................................................  $2,118,000
                                                                  ----------
                                                                  ----------
</TABLE>

(B) LEUKOSITE (U.K.) LIMITED

    The Company has a wholly owned subsidiary, LeukoSite (UK) Limited (LeukoSite
UK). LeukoSite UK was incorporated for the purpose of entering into a research
agreement to fund research activity in the United Kingdom. An agreement has been
established whereby LeukoSite UK will contribute $3,000,000

                                      F-19
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(16) COMMITMENTS (CONTINUED)
toward funding the construction, equipping and the operations of a research
center in the UK. The Company has paid and charged to operations $2,500,000 of
such commitment as of December 31, 1998, and the balance will be paid in
six-month intervals of $250,000 each. It is expected that the Company will fund
most of the cash requirements of LeukoSite UK.

(17) ACCRUED EXPENSES

    Accrued expenses in the accompanying consolidated balance sheets consist of
the following:

<TABLE>
<CAPTION>
                                                                           DECEMBER 31,
                                                                    --------------------------
<S>                                                                 <C>           <C>
                                                                        1997          1998
                                                                    ------------  ------------
Payroll and payroll-related.......................................  $    608,724  $    711,678
Consulting and contract research..................................       263,300       249,010
Preclinical research and development..............................       330,237     1,776,605
Clinical research and development.................................       174,592       559,672
Legal fees........................................................       145,018       124,882
Other.............................................................       344,552       693,454
                                                                    ------------  ------------
                                                                    $  1,866,423  $  4,115,301
                                                                    ------------  ------------
                                                                    ------------  ------------
</TABLE>

(18) PROFIT SHARING PLAN

    The Company maintains a profit sharing plan (the Plan) that provides for tax
deferred employee benefits under Section 401(k) of the Internal Revenue Code.
The Plan allows employees to make contributions, a portion of which will be
matched by the Company, up to 25% of the lesser of 6% of an employee's salary or
an employee's contributions. The Company's contributions are 100% vested. There
were no Company matching contributions during the years ended December 31, 1996
and 1997. The Company has made matching contributions to the Plan of
approximately $52,000 for the year ended December 31, 1998. The Company pays the
administrative costs of the Plan.

(19) COMPREHENSIVE INCOME

    In June 1997, the FASB issued SFAS No. 130, REPORTING COMPREHENSIVE INCOME.
The statement established standards for reporting and display of comprehensive
income and its components (revenues, expenses, gains and losses) in a full set
of general-purpose financial statements. This statement is effective for fiscal
years beginning after December 15, 1997. The Company has adopted this statement
for the year ended December 31, 1998 with no material impact on the Company's
financial statements as there are no material differences between comprehensive
income and reported.

(20) SEGMENT REPORTING

    In June 1997, the FASB issued SFAS No. 131, DISCLOSURES ABOUT SEGMENTS OF AN
ENTERPRISE AND RELATED INFORMATION. This statement established standards for the
way that public business enterprises report information about operating segments
in annual financial statements and require that enterprises report selected
information about operating segments in interim financial reports issued to
stockholders.

                                      F-20
<PAGE>
                         LEUKOSITE, INC. AND SUBSIDIARY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(20) SEGMENT REPORTING (CONTINUED)
    The Company has adopted this statement for the fiscal year ending December
31, 1998. In accordance with SFAS No. 131, the Company has one operating
segment. Additional disclosure of revenue information about products and
services is, therefore, not required.

(21) SUBSEQUENT EVENT

    On February 11, 1999, the Company acquired all of the issued and outstanding
capital stock of CytoMed Inc. (CytoMed) through the issuance of 935,625 shares
of the Company's Series A Convertible Preferred Stock, par value $.01 per share,
to CytoMed shareholders. The Series A Convertible Preferred Stock is convertible
into common stock on a one-to-one basis upon required approval by Company
shareholders. The Company will issue another 631,313 common shares to CytoMed
shareholders upon receipt of a $6,000,000 payment to CytoMed from UCB Pharma
which is required to be paid in October 1999. In addition, CytoMed shareholders
may receive up to $23,000,000 in cash and 84,000 shares of the Company's common
stock which is required upon the achievement of clinical development and
regulatory milestones related to CytoMed's product candidates. The total
purchase price, including shares issued, shares to be issued and transaction
costs, was approximately $16,100,000 and the net assets acquired were
approximately $14,500,000. The transaction will be accounted for as a purchase
in accordance with Accounting Principles Board Opinion No. 16, BUSINESS
COMBINATIONS.

                                      F-21
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the General Partners of
L&I Partners, L.P.:

    We have audited the accompanying balance sheets of L&I Partners, L.P. (a
Delaware Limited Partnership in the development stage), as of December 31, 1998
and 1997, and the related statements of operations, partners' capital and cash
flows for the year ended December 31, 1998, and for the period from inception
(May 2, 1997) through December 31, 1997, and cumulative from inception (May 2,
1997) through December 31, 1998. These financial statements are the
responsibility of the Partnership'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 financial position of L&I Partners, L.P., as of
December 31, 1998 and 1997, and the results of its operations and its cash flows
for the year ended December 31, 1998, and for the period from inception through
December 31, 1997, and cumulative from inception through December 31, 1998, in
conformity with generally accepted accounting principles.

                                          Arthur Andersen LLP

San Antonio, Texas
January 29, 1999

                                      F-22
<PAGE>
                               L&I PARTNERS, L.P.

                         (A DEVELOPMENT STAGE COMPANY)

                                 BALANCE SHEETS

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                                     DECEMBER 31
                                                                                                 --------------------
<S>                                                                                              <C>        <C>
                                                                                                   1998       1997
                                                                                                 ---------  ---------
                                            ASSETS
CASH AND CASH EQUIVALENTS......................................................................  $      60  $     353
PREPAID EXPENSES...............................................................................          4         --
                                                                                                 ---------  ---------
    Total assets...............................................................................  $      64  $     353
                                                                                                 ---------  ---------
                                                                                                 ---------  ---------
                               LIABILITIES AND PARTNERS' CAPITAL
CURRENT LIABILITIES:
  Accounts payable to related parties..........................................................  $     737  $   1,202
  Accrued subcontractor costs..................................................................         --      3,210
                                                                                                 ---------  ---------
    Total liabilities..........................................................................        737      4,412
                                                                                                 ---------  ---------
COMMITMENTS AND CONTINGENCIES
PARTNERS' CAPITAL:
  Limited partners' capital....................................................................       (666)    (4,006)
  General partner's capital....................................................................         (7)       (40)
  Receivable from general partner..............................................................         --        (13)
                                                                                                 ---------  ---------
    Total partners' capital....................................................................       (673)    (4,059)
                                                                                                 ---------  ---------
    Total liabilities and partners' capital....................................................  $      64  $     353
                                                                                                 ---------  ---------
                                                                                                 ---------  ---------
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-23
<PAGE>
                               L&I PARTNERS, L.P.

                         (A DEVELOPMENT STAGE COMPANY)

                            STATEMENTS OF OPERATIONS

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                                      CUMULATIVE
                                                                                                         FROM
                                                                                        INCEPTION     INCEPTION
                                                                          YEAR ENDED     THROUGH       THROUGH
                                                                         DECEMBER 31   DECEMBER 31,  DECEMBER 31,
                                                                             1998          1997          1998
                                                                         ------------  ------------  ------------
<S>                                                                      <C>           <C>           <C>
REVENUE................................................................   $       --    $       --    $       --
                                                                         ------------  ------------  ------------
OPERATING EXPENSES:
  General and administrative...........................................          153            --           153
                                                                         ------------  ------------  ------------
  Costs of contract research services performed by related parties.....        4,876         1,202         6,078
  Subcontractor costs..................................................        2,755         5,520         8,275
                                                                         ------------  ------------  ------------
      Total operating expenses.........................................        7,784         6,722        14,506
                                                                         ------------  ------------  ------------
OPERATING LOSS.........................................................       (7,784)       (6,722)      (14,506)
                                                                         ------------  ------------  ------------
INTEREST INCOME........................................................           68             6            74
                                                                         ------------  ------------  ------------
NET LOSS...............................................................   $   (7,716)   $   (6,716)   $  (14,432)
                                                                         ------------  ------------  ------------
                                                                         ------------  ------------  ------------
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-24
<PAGE>
                               L&I PARTNERS, L.P.

                         (A DEVELOPMENT STAGE COMPANY)

                        STATEMENTS OF PARTNERS' CAPITAL

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                     LIMITED      GENERAL
                                                                                    PARTNERS'    PARTNER'S
                                                                                     CAPITAL      CAPITAL      TOTAL
                                                                                   -----------  -----------  ---------
<S>                                                                                <C>          <C>          <C>
BALANCE, inception, May 2, 1997..................................................   $      --    $      --   $      --
  Contributions..................................................................       2,643           27       2,670
  Receivable from general partner................................................          --          (13)        (13)
  Net loss.......................................................................      (6,649)         (67)     (6,716)
                                                                                   -----------       -----   ---------
BALANCE, December 31, 1997.......................................................      (4,006)         (53)     (4,059)
  Contributions..................................................................      10,979          123      11,102
  Net loss.......................................................................      (7,639)         (77)     (7,716)
                                                                                   -----------       -----   ---------
BALANCE, December 31, 1998.......................................................   $    (666)   $      (7)  $    (673)
                                                                                   -----------       -----   ---------
                                                                                   -----------       -----   ---------
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-25
<PAGE>
                               L&I PARTNERS, L.P.

                         (A DEVELOPMENT STAGE COMPANY)

                            STATEMENTS OF CASH FLOWS

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                                      CUMULATIVE
                                                                                                         FROM
                                                                                        INCEPTION     INCEPTION
                                                                          YEAR ENDED     THROUGH       THROUGH
                                                                         DECEMBER 31   DECEMBER 31,  DECEMBER 31,
                                                                             1998          1997          1998
                                                                         ------------  ------------  ------------
<S>                                                                      <C>           <C>           <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss.............................................................   $   (7,716)   $   (6,716)   $  (14,432)
  Adjustments to reconcile net loss to net cash used in operating
    activities-........................................................
    Increase in assets-
      Prepaid expenses.................................................           (4)           --            (4)
    Increase (decrease) in liabilities-
      Accounts payable to related parties..............................        3,925         1,202         5,127
      Accrued subcontractor costs......................................       (3,210)        3,210            --
                                                                         ------------  ------------  ------------
          Net cash used in operating activities........................       (7,005)       (2,304)       (9,309)
                                                                         ------------  ------------  ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Capital contributions................................................        6,712         2,657         9,369
                                                                         ------------  ------------  ------------
          Net cash provided by financing activities....................        6,712         2,657         9,369
                                                                         ------------  ------------  ------------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS...................         (293)          353            60
CASH AND CASH EQUIVALENTS, beginning of period.........................          353            --            --
                                                                         ------------  ------------  ------------
CASH AND CASH EQUIVALENTS, end of period...............................   $       60    $      353    $       60
                                                                         ------------  ------------  ------------
                                                                         ------------  ------------  ------------
SUPPLEMENTAL DISCLOSURE OF NONCASH FINANCING ACTIVITIES:
    Capital contributions made through settlement of accounts payable
      to related parties...............................................   $    4,390    $       --    $    4,390
                                                                         ------------  ------------  ------------
                                                                         ------------  ------------  ------------
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-26
<PAGE>
                               L&I PARTNERS, L.P.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           DECEMBER 31, 1998 AND 1997

                             (AMOUNTS IN THOUSANDS)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

    ORGANIZATION AND CONTROL

    L&I Partners, L.P. (L&I), was founded in May 1997 as a joint venture between
Ilex Oncology, Inc. (Ilex), and Leukosite, Inc. (Leukosite). L&I was formed to
develop and commercialize a monoclonal antibody (CAMPATH-Registered Trademark-)
initially for the treatment of chronic lymphocytic leukemia, pursuant to an
agreement of limited partnership and a license agreement between Leukosite, Ilex
and L&I. The development and commercialization activities of L&I are jointly
managed by Leukosite and Ilex who will generally share equally in profits and
losses. The joint venture expires in 2017, but provides for either partner to
purchase the other partner's ownership interest in the joint venture in the
event of an unresolved deadlock (relating to the activities of the partnership)
after the earlier of a change in control (as defined therein) of the other party
or October 31, 2000. In addition, in the event that one party is unable or
unwilling to fulfill its funding obligations to the joint venture, then in
certain circumstances, the party that funds the joint venture shall gain control
of the management of the joint venture, subject to certain catch-up rights of
the other party.

    L&I is in the development stage and has not yet generated operating revenues
nor is there any assurance of future revenues. Since inception, L&I has received
significant support from Leukosite and Ilex. Although its affiliation with
Leukosite and Ilex puts it in a preferred position to develop and commercialize
a product, L&I continues to be subject to the risks and challenges associated
with other companies in a comparable stage of development including the ability
to obtain adequate financing to fund operations and development, dependence on
key individuals and entities, competition from larger companies and successful
marketing of its products. Accordingly, L&I's future success is uncertain.

    During the period from inception (May 2, 1997) through December 31, 1998,
L&I incurred a net loss of approximately $14.5 million and, at December 31,
1998, had a negative working capital of approximately $.7 million and negative
partners' capital of approximately $.7 million. The ability of L&I to continue
as a going concern is dependent upon the ongoing support of its partners. The
general and limited partners have committed to making additional capital
contributions in order to fund the obligations and operations of L&I through
fiscal 1999.

    Under the partnership structure, Ilex and Leukosite each hold a 49.5 percent
limited partner interest and L&I LLC holds a 1 percent general partner interest
in L&I. Ilex and Leukosite each hold a 50 percent interest in L&I LLC.

    BASIS OF PRESENTATION

    The accompanying financial statements have been prepared in accordance with
generally accepted accounting principles and are not the basis for reporting
taxable income to the partners. The financial statements include the accounts of
L&I only.

    ESTIMATES IN FINANCIAL STATEMENTS

    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and

                                      F-27
<PAGE>
                               L&I PARTNERS, L.P.
                         (A DEVELOPMENT STAGE COMPANY)

                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)

                           DECEMBER 31, 1998 AND 1997

                             (AMOUNTS IN THOUSANDS)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (CONTINUED)
liabilities and disclosure of contingent liabilities at the date of the
financial statements and the reported amounts of revenues and expenses during
the reporting period. Actual results may differ from those estimates.

    STATEMENT OF CASH FLOWS

    L&I considers all highly liquid investments with maturities of three months
or less at the date of purchase to be cash equivalents.

    INCOME TAXES

    Income and deductions of L&I for federal income tax purposes are includable
in the tax returns of the individual partners. Accordingly, no recognition has
been given to federal income taxes in the accompanying financial statements of
L&I.

    PRICE RISK MANAGEMENT ACTIVITIES

    L&I may enter into exchange traded futures and options contracts, forward
contracts, swaps and other financial instruments with third parties to hedge
foreign currency commitments.

    ALLOCATION OF NET INCOME (LOSS) AND CASH DISTRIBUTIONS

    Net income (loss) is allocated to partners based on their effective
ownership interest in the operating results of L&I. L&I is not required to and
has not made any cash distributions.

2. RELATED-PARTY TRANSACTIONS:

    L&I utilizes services extensively from both its limited partners. These
services include contract research, development, scientific expertise, business
development services and general management. The limited partners also provide
certain general management services free of charge to L&I, however, the fair
value of such services is immaterial to the results of operations of L&I for the
period from inception (May 2, 1997) through December 31, 1998. During the year
ended December 31, 1998 and for the period from May 2, 1997, through December
31, 1997, L&I incurred the following related party expenses for contract
research services (in thousands):

<TABLE>
<CAPTION>
                                                                               1998       1997
                                                                             ---------  ---------
<S>                                                                          <C>        <C>
ILEX.......................................................................  $   3,616  $     952
Leukosite..................................................................      1,260        250
                                                                             ---------  ---------
                                                                             $   4,876  $   1,202
                                                                             ---------  ---------
                                                                             ---------  ---------
</TABLE>

3. LICENSING AGREEMENTS:

    L&I has sublicensed the rights to CAMPATH-Registered Trademark- from
Leukosite. The licensing agreement grants L&I the right to develop and market
the product and to license the rights to the compound to other third parties.
Under terms of the agreement, L&I is required to pay certain fees and royalties
to Leukosite as defined in the agreement. No such payments were required for the
period from inception through December 31, 1998.

                                      F-28


<PAGE>

                                                                   EXHIBIT 99.3

               UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION

    The following unaudited pro forma combined financial statements have been
prepared to give effect to the merger using the purchase method of accounting.

    The unaudited pro forma combined balance sheet as of September 30, 1999
gives effect to the merger as if it had occurred on such date, and reflects the
allocation of the purchase price to the LeukoSite assets acquired, including
in-process research and development, and liabilities assumed. The unaudited pro
forma combined statements of operations combine the historical statements of
operations of Millennium and LeukoSite as if the merger had occurred at
January 1, 1998. The historical financial statements of LeukoSite included
herein have been adjusted on a pro forma basis to reflect the February 1999
acquisition of CytoMed, Inc. by LeukoSite as if such acquisition had occurred on
January 1, 1998 ("Historical LeukoSite Financial Statements Assuming the CytoMed
Acquisition"). Information with respect to the 1998 Historical LeukoSite
Financial Statements Assuming the CytoMed Acquisition is derived from and can be
found in the LeukoSite Form 8-K filed on April 27, 1999 in conjunction with the
CytoMed acquisition and incorporated by reference herein. The unaudited pro
forma combined statement of operations for the nine-month period ended
September 30, 1999 combines the historical unaudited statements of operations of
Millennium and LeukoSite, as adjusted, for such period. It is expected that
following the merger, Millennium will incur additional costs, which are not
expected to be significant to the combined results of operations, in connection
with integrating the operations of the two companies. Integration-related costs
are not included in the accompanying unaudited pro forma combined financial
statements.

    The Millennium statement of operations for the period in which the merger
occurs will include a significant charge for acquired in-process research and
development, currently estimated to be approximately $327.6 million, or 59.2% of
the purchase price. This amount represents the values determined by management,
using a discounted cash flow methodology, to be attributable to the in-process
research and development programs of LeukoSite based on a preliminary valuation
of such programs. Such amount is subject to significant change pending
completion of the final independent valuation analysis. The charge relates to
specific on-going research and development programs and preclinical projects.
Assuming each of these research programs continues through all stages of
clinical development, the projected future research and development expenditures
related to these programs, excluding the cost of research and development which
may be performed by corporate collaborators, is approximately $139.3 million.
The programs are forecasted to be completed at various times between 2000 and
2006. If Millennium would have allocated less of the purchase price to these
programs, the value would have been recorded as goodwill on the balance sheet
and amortized over the expected benefit period, resulting in increased
amortization expense during that period. Millennium believes that the allocation
of the purchase price to these programs is appropriate given the future
potential of these programs to contribute to the operations of Millennium.

    Unaudited pro forma combined financial information is presented for
illustrative purposes only and is not necessarily indicative of the financial
position or results of operations that would have actually been reported had the
merger occurred at the beginning of the periods presented, nor is it necessarily
indicative of future financial position or results of operations. These
unaudited pro forma combined financial statements are based upon the respective
historical financial statements of Millennium and LeukoSite, as adjusted, and do
not incorporate, nor do they assume, any benefits from cost savings or synergies
of operations of the combined company.


<PAGE>
                        MILLENNIUM PHARMACEUTICALS, INC.

                  UNAUDITED PRO FORMA COMBINED BALANCE SHEETS

                            AS OF SEPTEMBER 30, 1999
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                       HISTORICAL LEUKOSITE
                                    HISTORICAL         FINANCIAL STATEMENTS                           PRO FORMA
                                    MILLENNIUM             ASSUMING THE        PRO FORMA             MILLENNIUM
                               PHARMACEUTICALS, INC.   CYTOMED ACQUISITION    ADJUSTMENTS       PHARMACEUTICALS, INC.
                               ---------------------   --------------------   -----------       ---------------------
<S>                            <C>                     <C>                    <C>               <C>
ASSETS

Current Assets:
  Cash and cash equivalents..         $ 81,960               $  8,021                                  $ 89,981
  Marketable securities......          143,220                 14,360                                   157,580
  Due from strategic
    partners.................            9,547                                                            9,547
  Prepaid expenses and other
    current assets...........            6,746                  6,900                                    13,646
                                      --------               --------          --------                --------
Total current assets.........          241,473                 29,281                                   270,754
                                      --------               --------          --------                --------
Property and equipment, net..           51,152                  4,541                                    55,693
Restricted cash and other
  assets.....................           12,564                  5,291                                    17,855
Intangible assets, net.......            3,684                    208          $ 43,072 (B)             200,758
                                                                                  2,920 (C)
                                                                                151,082 (D)
                                                                                   (208)(F)
                                      --------               --------          --------                --------
Total assets.................         $308,873               $ 39,321          $196,866                $545,060
                                      ========               ========          ========                ========

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable...........         $ 13,450               $    464                                  $ 13,914
  Accrued expenses...........            8,466                  5,259          $  7,000 (E)              20,725
  Deferred revenue...........            7,371                  2,540                                     9,911
  Current portion of capital
    lease obligations........            8,836                    959                                     9,795
                                      --------               --------          --------                --------
Total current liabilities....           38,123                  9,222             7,000                  54,345
                                      --------               --------          --------                --------
Capital lease obligations,
  net of current portion.....           25,984                    975                                    26,959
Minority interest............           15,564                                                           15,564

Commitments and contingencies

Stockholders' equity:
  Preferred stock............
  Common stock...............               36                    147              (147)(G)                  43
                                                                                      7 (H)
  Additional paid-in                   321,525                 97,594           (97,594)(G)             868,126
    capital..................                                                   546,601 (H)
  Deferred compensation......           (1,370)                                                          (1,370)
  Notes receivable from
    officers.................              (29)                                                             (29)
  Other comprehensive loss...             (539)                                                            (539)
  Accumulated deficit........          (90,421)               (68,617)         (327,618)(A)            (418,039)
                                                                                 68,617 (G)
                                      --------               --------          --------                --------
Total stockholders' equity...          229,202                 29,124           189,866                 448,192
                                      --------               --------          --------                --------
Total liabilities and
  stockholders' equity.......         $308,873               $ 39,321          $196,866                $545,060
                                      ========               ========          ========                ========
</TABLE>

             See notes to unaudited pro forma financial statements.
<PAGE>
                        MILLENIUM PHARMACEUTICALS, INC.

             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS

                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1999

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                             HISTORICAL
                                                             LEUKOSITE
                                                             FINANCIAL
                                                             STATEMENTS                           PRO
                                         HISTORICAL         ASSUMING THE                         FORMA
                                         MILLENNIUM           CYTOMED       PRO FORMA         MILLENNIUM
                                    PHARMACEUTICALS, INC.   ACQUISITION    ADJUSTMENTS   PHARMACEUTICALS, INC.
                                    ---------------------   ------------   -----------   ---------------------
<S>                                 <C>                     <C>            <C>           <C>
Revenues:
  Strategic alliances.............        $128,581                                             $ 128,581
  Corporate collaborations and
    grants........................                            $  8,267                             8,267
  Joint venture revenue...........                               2,662                             2,662
                                          --------            --------      ---------          ---------
                                           128,581              10,929                           139,510
                                          --------            --------      ---------          ---------
Costs and expenses:
  Research and development........         113,276              23,551                           136,827
  General and administrative......          23,907               2,567                            26,474
  Acquired in-process research and
    development...................                               2,661                             2,661
  Amortization of intangible
    assets........................           2,027                          $  36,951 (I)         38,978
                                          --------            --------      ---------          ---------
                                           139,210              28,779         36,951            204,940
                                          --------            --------      ---------          ---------
Loss from operations..............         (10,629)            (17,850)       (36,951)           (65,430)
Interest income...................           9,209               1,021                            10,230
Interest expense..................          (2,177)               (131)                           (2,308)
Minority interest.................           2,204                                                 2,204
Equity in operations of joint
  venture.........................                              (3,900)                           (3,900)
                                          --------            --------      ---------          ---------
Net loss..........................        $ (1,393)           $(20,860)     $ (36,951)         $ (59,204)
                                          ========            ========      =========          =========
Basic and diluted net loss per
  share...........................        $  (0.04)           $  (1.49)                        ($   1.40)
                                          ========            ========                         =========

Shares Used In Calculating:
Basic and diluted net loss per
  share...........................          35,817              13,988        (13,988)(J)         42,394
                                                                                6,577 (K)
                                          ========            ========                         =========
</TABLE>

             See notes to unaudited pro forma financial statements.


<PAGE>
                        MILLENNIUM PHARMACEUTICALS, INC.

             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS

                      FOR THE YEAR ENDED DECEMBER 31, 1998

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                             HISTORICAL
                                                             LEUKOSITE
                                                             FINANCIAL
                                                             STATEMENTS                           PRO
                                         HISTORICAL         ASSUMING THE                         FORMA
                                         MILLENNIUM           CYTOMED       PRO FORMA         MILLENNIUM
                                    PHARMACEUTICALS, INC.   ACQUISITION    ADJUSTMENTS   PHARMACEUTICALS, INC.
                                    ---------------------   ------------   -----------   ---------------------
<S>                                 <C>                     <C>            <C>           <C>
Revenues:
  Strategic alliances.............        $133,682                                             $ 133,682
  Corporate collaborations and
    grants........................                            $ 12,324                            12,324
  Joint venture revenue...........                               1,260                             1,260
                                          --------            --------      ---------          ---------
                                           133,682              13,584                           147,266
                                          --------            --------      ---------          ---------
Costs and expenses:
  Research and development........         114,190              24,535                           138,725
  General and administrative......          24,419               4,144                            28,563
  Amortization of intangible
    assets........................           2,702                          $  49,269 (I)         51,971
                                          --------            --------      ---------          ---------
                                           141,311              28,679         49,269            219,259
                                          --------            --------      ---------          ---------
Loss from operations..............          (7,629)            (15,095)       (49,269)           (71,993)
Interest income...................           6,198               1,789                             7,987
Interest expense..................          (2,410)               (171)                           (2,581)
Minority interest.................          14,179                                                14,179
Equity in operations of joint
  venture.........................                              (3,858)                           (3,858)
                                          --------            --------      ---------          ---------
Net income (loss).................        $ 10,338            $(17,335)     $ (49,269)         $ (56,266)
                                          ========            ========      =========          =========
Basic net income (loss) per
  share...........................        $   0.34            $  (1.39)                        $   (1.52)
                                          ========            ========                         =========
Diluted net income (loss) per
  share...........................        $   0.33            $  (1.39)                        $   (1.52)
                                          ========            ========                         =========

Shares Used In Calculating:
Basic net income (loss) per                                                   (12,462)(J)
  share...........................          30,319              12,462          6,577 (K)         36,896
                                          ========            ========                         =========
Diluted net income (loss) per
  share...........................          31,508              12,462                            36,896
                                          ========            ========                         =========
</TABLE>

             See notes to unaudited pro forma financial statements.


<PAGE>
                        MILLENNIUM PHARMACEUTICALS, INC.

           NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

NOTE 1

    The unaudited pro forma combined financial statements reflect the conversion
of all of the outstanding shares of LeukoSite common stock into approximately
6,577,110 shares of Millennium common stock pursuant to the merger. This
calculation is based on LeukoSite's outstanding capitalization at September 30,
1999 using the conversion ratio of 0.4296 of a share of Millennium common stock
for each share of outstanding LeukoSite common stock. Options and warrants to
purchase approximately 2,297,246 shares of LeukoSite common stock with a
weighted average exercise price of $9.17 will be assumed by Millennium pursuant
to the merger and converted into options and warrants to purchase 986,911 shares
of Millennium common stock. The total cost of the proposed merger is estimated
to be approximately $553.6 million, determined as follows (in thousands):

<TABLE>
<S>                                                           <C>
Fair value of Millennium shares (calculated using $74.52 per
  share fair value at the date of the merger agreement).....  $490,100
Value of LeukoSite options and warrants assumed.............    56,508
Millennium transaction costs, consisting primarily of
  financial advisory, legal and accounting fees.............     7,000
                                                              --------
                                                              $553,608
                                                              ========
</TABLE>

    Based upon a preliminary valuation of tangible and intangible assets
acquired and liabilities assumed, Millennium has allocated the total cost of the
merger to the net assets of LeukoSite as follows (in thousands):

<TABLE>
<S>                                                           <C>
Tangible assets acquired....................................  $ 39,113
In-process research and development.........................   327,618
Intangible assets (assembled workforce, core technology and
  goodwill).................................................   197,074
Liabilities assumed.........................................   (10,197)
                                                              --------
                                                              $553,608
                                                              ========
</TABLE>

    LeukoSite is engaged in the discovery and development of a new class of
pharmaceutical products for the treatment or prevention of serious diseases.
LeukoSite's business focus is in the development of medicines for treating
cancer and inflammatory, autoimmune and viral diseases. LeukoSite's research and
development programs in these areas are in various stages from pre-clinical
development to late stage clinical trials. LeukoSite's strategy has been to
develop and commercialize its products through alliances with major
pharmaceutical and biotechnology companies. No products utilizing LeukoSite's
proprietary technologies have been approved for marketing to date. The LeukoSite
research and development programs currently in process were valued as follows:

<TABLE>
<S>                                                           <C>
CAMPATH-Registered Trademark-...............................  $ 38,922
LDP-01......................................................    20,155
LDP-02......................................................    24,482
LDP-341.....................................................   139,149
LDP-977.....................................................    17,334
Preclinical projects........................................    87,576
                                                              --------
                                                              $327,618
                                                              ========
</TABLE>


<PAGE>
                        MILLENNIUM PHARMACEUTICALS, INC.

     NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE 1 (CONTINUED)

    The in-process research and development has been written off against the
combined retained earnings. Because the charge is nonrecurring, it has not been
reflected in the pro forma combined statements of operations. Such charge will
be included in the Millennium statement of operations in the quarter in which
the merger is completed. The intangible assets will be amortized over their
estimated useful lives of 4 years.

NOTE 2

    The pro forma combined balance sheet includes the adjustments necessary to
give effect to the merger as if it had occurred on September 30, 1999 and to
reflect the allocation of the acquisition cost to the fair value of tangible and
intangible assets acquired and liabilities assumed as noted above, including a
charge to retained earnings for acquired in-process research and development and
the elimination of LeukoSite's equity accounts. Adjustments included in the pro
forma combined balance sheet are summarized as follows (in thousands except per
share amounts):

    (A) The charge to operations for in-process research and development of
       $327,618.

    (B) The valuation of $43,072 for LeukoSite core technology.

    (C) The valuation of $2,920 for the LeukoSite workforce.

    (D) The valuation of $151,082 for the LeukoSite goodwill.

    (E) The accrual of the estimated acquisition costs of $7,000.

    (F) To eliminate LeukoSite historical goodwill of $208.

    (G) To eliminate LeukoSite historical stockholders' equity amounts:

<TABLE>
<S>                                                           <C>
Common stock................................................  $   147
Additional paid-in capital..................................   97,594
Accumulated deficit.........................................   68,617
</TABLE>

    (H) Issuance of 6,577,110 shares of Millennium $.001 par value common stock
       to acquire all of the outstanding common stock of LeukoSite and
       assumption of options and warrants to purchase common stock, as discussed
       in Note 1. Common stock credited for $7 and additional paid-in capital
       credited for $546,601, including an adjustment of $56,508 to reflect the
       fair value of stock options and warrants issued by Millennium
       Pharmaceuticals in exchange for the LeukoSite stock options and warrants.

NOTE 3

    The Historical LeukoSite Financial Statements Assuming the CytoMed
Acquisition, for the nine months ended September 30, 1999, have been adjusted on
a pro forma basis to reflect the February 1999 acquisition of CytoMed, Inc. by
LeukoSite as if such acquisition had occurred on January 1, 1998. Such pro forma
adjustments include the addition of $744 of Research and Development Costs,
incurred by CytoMed in 1999 prior to the acquisition, and the reversal of the
$1,588 Acquired In-Process Research and Development charge, associated with the
CytoMed acquisition, due to its non-recurring nature.


<PAGE>
                        MILLENNIUM PHARMACEUTICALS, INC.

     NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE 3 (CONTINUED)

    The Historical LeukoSite Financial Statements Assuming the CytoMed
Acquisition for the year ended December 31, 1998 are derived from and can be
found in the LeukoSite Form 8-K filed on April 27, 1999 in conjunction with the
CytoMed acquisition.

NOTE 4

    The pro forma combined statements of operations include the adjustments
necessary to give effect to the merger as if it had occurred on January 1, 1998.

    (I) Adjustments consist of the amortization of acquired intangible assets
       using the following estimated useful lives:

<TABLE>
<S>                                                           <C>
Assembled workforce.........................................  4 years
Core technology.............................................  4 years
Goodwill....................................................  4 years
</TABLE>

NOTE 5

    (J) To eliminate LeukoSite weighted average shares outstanding.

    (K) Pro forma basic and diluted net loss per share amounts for the year
       ended December 31, 1998 and the nine-month period ended September 30,
       1999, are based upon the historical weighted-average number of Millennium
       common stock outstanding adjusted to reflect the issuance, as of
       January 1, 1998, of approximately 6,577,110 shares of Millennium common
       stock.

    (L) The impact of outstanding options and warrants, including LeukoSite
       options and warrants assumed, has been excluded from the calculation of
       diluted net loss per share as the effect would be antidilutive.



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