NPS PHARMACEUTICALS INC
DEFM14A, 1999-11-18
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>

                            SCHEDULE 14A INFORMATION

                PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant [X]

Filed by a Party other than the Registrant [_]
Check the appropriate box:

[_]    Preliminary proxy statement

[_]    Confidential, for use of the Commission only (as permitted by Rule 14a-
       6(e)(2))

[X]    Definitive proxy statement

[_]    Definitive additional materials

[_]    Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12

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

                           NPS PHARMACEUTICALS, INC.
               (Name of Registrant as Specified in Its Charter)

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


   (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of filing fee (check the appropriate box):

[_]  No fee required

[X]   Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
     (1) Title of each class of securities to which transaction applies: Common
                                                                         ------
         Stock (par value $.001)
         -----------------------
     (2) Aggregate number of securities to which transaction applies: 7,619,290
                                                                      ---------
     (3) Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11. (set forth the amount on which the
         filing fee is calculated and state how it was determined): $4.125 **
                                                                    ---------
     (4) Proposed maximum aggregate value of transaction: $31,429,571.25 **
                                                          -----------------
     (5)  Total fee paid: $6,285.91
                          ---------
               [X]  Fee paid previously with preliminary materials.

               [_]  Check box if any part of the fee is offset as provided by
                    Exchange Act Rule 0-11(a)(2) and identify the filing for
                    which the offsetting fee was paid previously. Identify the
                    previous filing by registration statement number, or the
                    Form or Schedule and the date of its filing.
                    (1)  Amount Previously Paid: Not Applicable
                                                 --------------
                    (2)  Form, Schedule or Registration Statement No.: Not
                                                                       ---
                         Applicable
                         ----------
                    (3)  Filing Party: Not Applicable
                                        -------------
                    (4)  Date Filed: Not Applicable
                                     --------------

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

**  Estimated solely for the purpose of calculating the filing fee pursuant to
    Exchange Act Rules 14a-6(i)(1) and 0-11. The fee has been calculated based
    on the average of the high and low prices per share of NPS Common Stock as
    reported on the Nasdaq Stock Market on October 28, 1999.
<PAGE>

                                                               November 17, 1999



                           NPS PHARMACEUTICALS, INC.
                                420 Chipeta Way
                        Salt Lake City, Utah 84108-1256



DEAR STOCKHOLDER:

     You are cordially invited to attend a special meeting of the stockholders
of NPS Pharmaceuticals, Inc., to be held at the Company's headquarters located
at 420 Chipeta Way, Salt Lake City, Utah, 84108, on December 15, 1999 at 10:00
a.m. local time.

     At this meeting, you will be asked to consider and vote upon certain
matters related to the merger between NPS and Allelix Biopharmaceuticals Inc.
The matters to be voted on are described more fully in the accompanying Proxy
Statement.

     After careful consideration, the Board of Directors of NPS has unanimously
approved the merger and has concluded it is fair to, and in the best interests
of, NPS and its stockholders. The NPS Board of Directors unanimously recommends
that you vote in favor of the proposals described in the accompanying Proxy
Statement.

     In the materials accompanying this letter you will find a Notice of Special
Meeting of Stockholders, a Proxy Statement relating to the proposals to be voted
upon at the NPS Special Meeting and a Proxy Card.

     All stockholders are cordially invited to attend the NPS Special Meeting in
person, but if you do not plan to attend, please follow the instructions for
return of the proxy card.

     On behalf of the NPS Board of Directors, we thank you for your support.

                              Sincerely,

                              /s/ Hunter Jackson
                              Hunter Jackson
                              Chairman and CEO
<PAGE>

                           NPS PHARMACEUTICALS, INC.
                                420 Chipeta Way
                        Salt Lake City, Utah 84108-1256


                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                 December 15, 1999 at 10:00 a.m. (local time)
                                      at
                           NPS Pharmaceuticals, Inc.
                                420 Chipeta Way
                          Salt Lake City, Utah 84108

TO THE STOCKHOLDERS OF NPS PHARMACEUTICALS, INC.:

  NOTICE IS HEREBY GIVEN that a Special Meeting of Stockholders of NPS
Pharmaceuticals, Inc., a Delaware corporation ("NPS"), will be held on December
15, 1999, at 10:00 a.m., local time, at the Company's headquarters located at
420 Chipeta Way, Salt Lake City, Utah for the following purposes:

  1.  To approve the issuance of shares of NPS common stock, $0.001 par value
      per share (the "NPS Common Stock"), in connection with the Arrangement
      Agreement, dated as of September 27, 1999, by and among Allelix
      Biopharmaceuticals Inc. and NPS (the "Arrangement").

  2.  To approve an amendment to the Certificate of Incorporation of NPS
      increasing the total number of shares of capital stock that NPS is
      authorized to issue from 25,000,000 shares to 50,000,000 shares and the
      total number of shares of common stock authorized for issuance thereunder
      to 45,000,000 shares from 20,000,000 shares.

  3.  To transact such other business as may properly come before the meeting or
      any adjournment thereof.

  Approval of items 1 and 2 above is a closing condition to the Arrangement.
The foregoing items of business are more fully described in the Proxy Statement
accompanying this Notice.

  The Board of Directors has fixed the close of business on November 11, 1999
as the record date for the determination of stockholders entitled to notice of
and to vote at this Special Meeting of Stockholders and at any adjournment
thereof.

                              By Order of the Board of Directors

                              /s/ James U. Jensen
                              James U. Jensen, Secretary
Salt Lake City, Utah
November 17, 1999

- -------------------------------------------------------------------------------
  ALL STOCKHOLDERS ARE CORDIALLY INVITED TO ATTEND THE SPECIAL MEETING IN
  PERSON. WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING, PLEASE
  COMPLETE, DATE, SIGN, AND RETURN THE ENCLOSED PROXY CARD AS PROMPTLY AS
  POSSIBLE IN ORDER TO ENSURE YOUR REPRESENTATION AT THE SPECIAL MEETING. A
  RETURN ENVELOPE (WHICH IS POSTAGE PREPAID IF MAILED IN THE UNITED STATES) IS
  ENCLOSED FOR THAT PURPOSE. YOU MAY STILL VOTE IN PERSON IF YOU ATTEND THE
  SPECIAL MEETING. PLEASE NOTE, HOWEVER, THAT IF YOUR SHARES ARE HELD OF RECORD
  BY A BROKER, BANK, OR OTHER NOMINEE AND YOU WISH TO VOTE AT THE SPECIAL
  MEETING, YOU MUST OBTAIN FROM THE RECORD HOLDER A PROXY ISSUED IN YOUR NAME.
- -------------------------------------------------------------------------------
<PAGE>

                           NPS PHARMACEUTICALS, INC.
                                420 Chipeta Way
                        Salt Lake City, Utah 84108-1256

                                PROXY STATEMENT
                    for the Special Meeting of Stockholders
                              (December 15, 1999)

                                  INFORMATION

  This Proxy Statement is being furnished by the Board of Directors (the "Board"
or "Board of Directors") of NPS Pharmaceuticals, Inc., a Delaware corporation
("NPS" or the "Company" or "we") to holders of common stock, $0.001 par value
per share (the "NPS Common Stock") of NPS (the "NPS Stockholders") in connection
with the solicitation of proxies by the Board of Directors of NPS for use at the
Special Meeting of Stockholders of NPS or any adjournment or postponement
thereof. The Special Meeting is being called to consider and vote upon a
proposal to approve the issuance of shares of NPS Common Stock in connection
with the merger (sometimes called the "Arrangement") provided for in the
Arrangement Agreement dated as of September 27, 1999 between Allelix
Biopharmaceuticals Inc. ("Allelix") and NPS (the "Arrangement Agreement"), as
amended, and to approve an amendment to NPS's Certificate of Incorporation (the
"Certificate of Amendment") increasing the number of shares of capital stock
that NPS is authorized to issue from 25,000,000 shares to 50,000,000 shares, and
the total number of shares of common stock authorized for issuance thereunder to
45,000,000 shares from 20,000,000shares. The approval of this amendment is a
closing condition to the Arrangement. A copy of the Arrangement Agreement is
attached hereto as Appendix A. A copy of the Plan of Arrangement is attached
hereto as Appendix B. A copy of the Certificate of Amendment is attached hereto
as Appendix C.

  Allelix is a Canadian biopharmaceutical company that applies proprietary
technologies to the identification of disease targets and to the discovery,
design, and development of novel pharmaceutical products.  Products are
commercialized in partnership with leading biotechnology and multinational
pharmaceutical companies for global markets and by Allelix itself for niche
market indications.

  Upon consummation of the proposed Arrangement, each outstanding share of
Allelix Common Stock will become 0.3238 of a share of NPS Common Stock or 0.3238
of an Exchangeable Share entitling the holder to acquire one share of NPS Common
Stock on exchange. Each outstanding warrant or option exercisable into Allelix
Common Stock will be exercisable into the right to receive 0.3238 of a share of
NPS Common Stock or 0.3238 of an Exchangeable Share entitling the holder to
acquire one share of NPS Common Stock on exchange for each one share of Allelix
Common Stock the holder was theretofore entitled to receive upon exercise The
number of shares of NPS Common Stock into which each share of Allelix Common
Stock will be converted pursuant to the Arrangement is referred to as the
"Exchange Ratio." This "Exchange Ratio" also applies to the Allelix Preferred
Stock. Accordingly, each outstanding share of Allelix Preferred Stock
convertible into shares of Allelix Common Stock will be convertible into 0.3238
of a share of NPS Common Stock for each share of Allelix Common Stock the holder
was theretofore entitled to receive upon conversion. Up to an aggregate of
7,567,202 shares of NPS Common Stock may be issued in connection with the
Arrangement.

  The obligations of NPS and Allelix to effect the Arrangement and otherwise
consummate the transactions contemplated by the Arrangement Agreement are
subject to the satisfaction or waiver of various conditions, including the
approval of an increase in the authorized capital stock of NPS by the holders of
a majority of the outstanding shares of NPS Common Stock, and the approval of
the issuance of NPS Common Stock in connection with the Arrangement by the
holders of a majority of the outstanding shares of NPS Common Stock present in
person or represented by proxy at the NPS Special Meeting and entitled to vote
thereat, and the adoption and approval of the Arrangement Agreement by holders
of the outstanding shares of Allelix Common Stock and Allelix Preferred Stock
and approval by the Superior Court of Justice in Toronto, Ontario. The
Arrangement is expected to be consummated shortly after such approvals are
obtained, and the other conditions to the consummation of the Arrangement are
satisfied or waived. It is currently anticipated that the Arrangement will be
consummated in late December 1999.

  This Proxy Statement and the accompanying form of proxy are first being mailed
to stockholders of NPS on or about November 17, 1999.

  THE ABOVE MATTERS ARE DISCUSSED IN DETAIL IN THIS PROXY STATEMENT.
STOCKHOLDERS OF NPS ARE STRONGLY URGED TO READ AND CONSIDER CAREFULLY THIS PROXY
STATEMENT AND THE ACCOMPANYING APPENDICES IN THEIR ENTIRETY, INCLUDING THE
MATTERS REFERRED TO UNDER "RISK FACTORS" BEGINNING AT PAGE 21. THESE MATTERS
HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION
(THE "COMMISSION") NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS  PROXY STATEMENT. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.

  The date of this Proxy Statement is November 17, 1999.
<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<S>                                                                                                       <C>
AVAILABLE INFORMATION..................................................................................    1

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE........................................................    1

REPORTING OF CURRENCIES AND ACCOUNTING PRINCIPLES......................................................    2

CANADIAN / UNITED STATES EXCHANGE RATES................................................................    2

SUMMARY................................................................................................    2
     The Companies.....................................................................................    2
          NPS Pharmaceuticals, Inc.....................................................................    2
          Allelix Biopharmaceuticals Inc...............................................................    3
     The NPS Special Meeting...........................................................................    3
          Time, Date, and Place........................................................................    3
          Purpose......................................................................................    3
          Record Date and Vote Required................................................................    3
The Arrangement........................................................................................    3
          General......................................................................................    3
          Stock Ownership Following the Arrangement....................................................    4
          Effective Time...............................................................................    4
          The Exchangeable Shares......................................................................    4
          NPS's Reasons for the Arrangement............................................................    5
          Recommendation of the Board of Directors of NPS..............................................    5
          Opinion of NPS's Financial Advisor, Prudential Securities....................................    6
          Conditions to Closing........................................................................    6
          Termination..................................................................................    6
          Termination Fees and Expenses................................................................    7
          Accounting Treatment.........................................................................    7
          Stock Exchange Listings......................................................................    7
          Certain Federal Income Tax Considerations....................................................    7
          Dissent Rights...............................................................................    8
          Non-Solicitation.............................................................................    8
          Interests of Certain Persons in The Arrangement..............................................    8
          Risk Factors.................................................................................    8

SELECTED HISTORICAL FINANCIAL INFORMATION OF ALLELIX...................................................    9

SELECTED HISTORICAL FINANCIAL INFORMATION OF NPS.......................................................    9

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION.......................................   10

COMPARATIVE PER SHARE DATA.............................................................................   19

MARKETS AND MARKET PRICES AND DIVIDEND POLICY..........................................................   20

RISK FACTORS...........................................................................................   21

THE NPS SPECIAL MEETING................................................................................   23
     Purpose...........................................................................................   23
     Solicitation of Proxies...........................................................................   23
     Record Date, Entitlement to Vote, and Outstanding Shares..........................................   23
</TABLE>
                                       i
<PAGE>

<TABLE>
<S>                                                                                                            <C>
     Revocation of Proxies..................................................................................   24
     Required Votes to Approve..............................................................................   24

THE ALLELIX SPECIAL MEETING.................................................................................   24

PROPOSAL ONE -- APPROVAL OF THE SHARE ISSUANCES IN CONNECTIONWITH THE ARRANGEMENT...........................   24
     Background of the Arrangement..........................................................................   24
     NPS's Reasons for the Arrangement and Recommendation of the NPS Board..................................   25
     Opinion of NPS's Financial Advisor, Prudential Securities..............................................   27
     Interests of Certain Persons in the Arrangement........................................................   31
     Mechanics31
     Description of Exchangeable Shares.....................................................................   32
     Allelix Preferred Shares...............................................................................   34
     Options................................................................................................   34
     Warrants...............................................................................................   35
     Court Approval and Completion of the Continuance and the Arrangement...................................   35
     Accounting Treatment...................................................................................   35
     Regulatory Matters.....................................................................................   36
     No NPS Appraisal Rights................................................................................   36
     The Composition of the NPS Board of Directors..........................................................   36
     Stock Exchange Listing.................................................................................   36
          Exchangeable Shares...............................................................................   36
          NPS Common Shares.................................................................................   36
Resale of Exchangeable Shares and NPS Common Shares Received in Connection with the Arrangement.............   36
          United States.....................................................................................   36
          Canada............................................................................................   37
Ongoing Canadian Reporting Obligations......................................................................   38

THE ARRANGEMENT AGREEMENT AND RELATED AGREEMENTS............................................................   38
     Effective Date of the Arrangement......................................................................   38
     Termination............................................................................................   38
     Termination Fees and Expenses..........................................................................   38
     Conditions to Closing..................................................................................   39
          Mutual Conditions Precedent.......................................................................   39
          Conditions Precedent for the Benefit of Allelix...................................................   40
          Conditions Precedent for the Benefit of NPS.......................................................   42
     General Covenants......................................................................................   43
          Mutual Covenants..................................................................................   43
          Covenants of Allelix..............................................................................   44
          Covenants of NPS..................................................................................   44
     Covenants of Allelix Regarding Non-Solicitation........................................................   45
     Covenants of NPS Regarding No Shop.....................................................................   46
     Representations and Warranties.........................................................................   46
          Mutual Representations and Warranties.............................................................   46
          Representations and Warranties of Allelix.........................................................   47
          Representations and Warranties of NPS.............................................................   47
     Confidentiality........................................................................................   47
     Standstill.............................................................................................   48
     Access.................................................................................................   49
     Amendment..............................................................................................   49
     Support Agreement......................................................................................   49
     Voting and Exchange Trust Agreement....................................................................   50
</TABLE>
                                      ii
<PAGE>

<TABLE>
<S>                                                                                                              <C>
PROPOSAL TWO - APPROVAL OF THE AMENDMENT OF THENPS
     CERTIFICATE OF INCORPORATION..............................................................................   51

INCOME TAX CONSEQUENCES TO NPS STOCKHOLDERS....................................................................   51

INFORMATION CONCERNING ALLELIX.................................................................................   51
     Business of Allelix.......................................................................................   51
     Documents Included as Appendices..........................................................................   53
     1999 Financial Results and Management's Discussion and Analysis of Financial Condition and Results of
          Operations ("MD&A")..................................................................................   53
     Directors and Officers....................................................................................   53
          Indebtedness of Directors and Senior Officers of Allelix.............................................   54
     Share Capital Matters.....................................................................................   54
          Allelix Preferred Shares.............................................................................   55
          Allelix Common Shares................................................................................   55
     Stock Exchange Listings...................................................................................   55
     Auditors, Transfer Agents and Registrars..................................................................   55

LEGAL MATTERS..................................................................................................   55

REPRESENTATIVES OF INDEPENDENT ACCOUNTANTS.....................................................................   55

APPENDICES:

     APPENDIX A  -  Arrangement Agreement......................................................................  A-1
     APPENDIX B  -  Schedule A to the Arrangement Agreement:  Plan of Arrangement Including Exchangeable
          Share Provisions.....................................................................................  B-1
     APPENDIX C  -  Certificate of Amendment of the Certificate of Incorporation...............................  C-1
     APPENDIX D  -  Opinion of Prudential Securities...........................................................  D-1
     APPENDIX E  -  Management's Proxy Circular of Allelix Biopharmaceuticals Inc. (without appendices)........  E-1
     APPENDIX F  -  Schedule C to the Arrangement Agreement:  Form of Voting and Exchange Trust Agreement......  F-1
     APPENDIX G  -  Interim Order and Notice of Application....................................................  G-1
     APPENDIX H  -  Schedule C to the Arrangement Agreement:  Form of Support Agreement........................  H-1
     APPENDIX I  -  Allelix's Annual Information Form, dated January 14, 1999..................................  I-1
     APPENDIX J  -  Allelix's Audited Consolidated Financial Statements for the Year Ended August 31, 1999.....  J-1
     APPENDIX K  -  Allelix's Management's Discussion and Analysis of Financial Condition and
          Results of Operations for the Year Ended August 31, 1999.............................................  K-1
     APPENDIX L  -  Allelix's Form 27, Material Change Reports, dated October 6, 1999
          (without exhibits)...................................................................................  L-1
</TABLE>
                                      iii
<PAGE>

                             AVAILABLE INFORMATION

  NPS is subject to the informational requirements of the Securities Exchange
Act of 1934 ("Exchange Act"), as amended, and in accordance therewith NPS files
reports, proxy statements and other information with the Securities and Exchange
Commission (the "Commission"). The reports, proxy statements, and other
information filed by NPS with the Commission may be inspected and copied at the
public reference facilities maintained by the Commission at Room 1024, 450 Fifth
Street, N.W., Washington, D.C. 20549, and at the Commission's regional offices
at 500 West Madison Street, Suite 1400, Chicago, Illinois 60661, and 7 World
Trade Center, Suite 1300, New York, New York 10048. Copies of such material may
also be obtained from the Commission at prescribed rates by writing to the
Public Reference Section of the Commission, 450 Fifth Street, N.W., Washington,
D.C. 20549. The NPS Common Stock is quoted on the Nasdaq Stock Market and
reports and other information concerning NPS may be inspected at the offices of
the National Association of Securities Dealers, Inc., 1735 K Street, N.W.,
Washington, D.C. 20006.

  The Commission maintains a web site that contains reports, proxy and
information statements, and other information regarding registrants that file
electronically with the Commission. Such electronic filing system is referred to
as EDGAR and electronic filings are sometimes referred to as "EDGAR" filings.
The address of the site is http://www.sec.gov. This Proxy Statement is filed
                           -------------------
with the Commission on EDGAR. Accordingly, this Proxy Statement and the listed
Appendices are available from the Commission electronically at the web site of
the Commission.

  Allelix is subject to the continuous disclosure requirements of Canadian
securities regulatory authorities, the Montreal Exchange ("ME") and The Toronto
Stock Exchange ("TSE"). Copies of materials filed with the Canadian securities
regulatory authorities can be requested from Micromedia, 20 Victoria Street,
Toronto, Ontario M5C 2N3. Generally, such information is also available at the
Internet site maintained by CDS Inc. at www.sedar.com.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

  The Company incorporates by reference herein the following documents
previously filed with the Commission.

  1.   NPS's Annual Report on Form 10-K/A for the fiscal year ended December 31,
1998.

  2.   NPS's Quarterly Reports on Form 10-Q for the periods ended March 31,
1999, June 30, 1999, and September 30, 1999.

  3.   NPS's Current Reports on Form 8-K filed with the Commission on October 1,
1999 and November 12, 1999.

  The information relating to NPS contained in this Proxy Statement does not
purport to be comprehensive and should be read together with the information in
the documents incorporated by reference herein.

  All documents filed by NPS pursuant to Sections 13(a), 13(c), 14, or 15(d) of
the Exchange Act after the date of this Proxy Statement and prior to the date of
the NPS Special Meeting shall be deemed to be incorporated by reference into
this Proxy Statement and to be a part hereof from the dates of filing such
documents or reports. Any statement contained herein or in a document
incorporated or deemed to be incorporated by reference herein shall be deemed to
be modified or superseded for purposes of this Proxy Statement to the extent
that a statement contained herein or in any other subsequently filed document
which is also incorporated or is deemed to be incorporated herein modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Proxy Statement.

  THIS PROXY STATEMENT INCORPORATES DOCUMENTS BY REFERENCE WHICH ARE NOT
PRESENTED HEREIN OR DELIVERED HEREWITH. THESE DOCUMENTS ARE AVAILABLE WITHOUT
CHARGE TO ANY PERSON TO WHOM A COPY OF THIS PROXY STATEMENT HAS BEEN DELIVERED
UPON WRITTEN OR ORAL REQUEST TO NPS PHARMACEUTICALS, INC., 420 CHIPETA WAY, SALT
LAKE CITY, UTAH 84108, ATTENTION: INVESTOR RELATIONS; TELEPHONE (801) 583-4939.

                                       1
<PAGE>

  This Proxy Statement is being furnished to NPS's stockholders in connection
with the solicitation of proxies by the NPS Board of Directors for use at the
NPS Special Meeting. Each copy of this Proxy Statement mailed to the NPS
Stockholders is accompanied by a form of proxy for use at the NPS Special
Meeting.

  This Proxy Statement contains trademarks of NPS and Allelix as well as
trademarks of other companies.

               REPORTING OF CURRENCIES AND ACCOUNTING PRINCIPLES

  The historical financial statements of Allelix contained in this Proxy
Statement are reported in Canadian dollars and have been prepared in accordance
with Canadian GAAP. The historical financial statements of NPS incorporated by
reference and the unaudited pro forma condensed consolidated financial
statements contained in this Proxy Statement are reported in U.S. dollars and
have been prepared in accordance with U.S. GAAP.

                    CANADIAN / UNITED STATES EXCHANGE RATES

  In this Proxy Statement, dollar amounts are expressed in U.S.$ unless
otherwise indicated.

  The following table sets forth, for each period indicated, the high and low
exchange rates for one Canadian dollar expressed in U.S. dollars, the average of
such exchange rates on the last day of each month during such period, and the
exchange rate at the end of such period, in each case, based upon the noon spot
rate of the Bank of Canada.

<TABLE>
<CAPTION>
                                  Year Ended August 31
                       -------------------------------------------
                        1995     1996     1997     1998     1999
                       -------  -------  -------  -------  -------
         <S>           <C>      <C>      <C>      <C>      <C>
         High          0.74910  0.75320  0.75370  0.73040  0.69170
         Low           0.70040  0.72090  0.70970  0.63070  0.63750
         Average       0.72692  0.73340  0.73070  0.69559  0.66374
         Period End    0.74460  0.73120  0.72000  0.63920  0.66980
</TABLE>

  On September 27, 1999 and on November 10, 1999, the exchange rate for one
Canadian dollar expressed in U.S. dollars was U.S.$0.68010 and U.S.$0.67930,
respectively.

                                    SUMMARY

  The following is a summary of certain information contained elsewhere in this
Proxy Statement. This summary is not, and is not intended to be, complete by
itself. This Proxy Statement contains forward-looking statements that involve
risks and uncertainties. Other risks and uncertainty also exist for the Company
and for the proposals to be presented at the NPS Special Meeting of
Stockholders. NPS's actual results may differ materially from those anticipated
in these forward-looking statements and/or for the Company or said proposals as
a result of certain factors, including those set forth under "Risk Factors" and
elsewhere in this Proxy Statement, and in the documents incorporated herein by
reference. This summary is qualified in its entirety by reference to the more
detailed information contained elsewhere in this Proxy Statement, the appendices
attached hereto and the documents referred to or incorporated by reference
herein. Stockholders of NPS are urged to review carefully all of the information
contained in this Proxy Statement, the Arrangement Agreement attached as
Appendix A, and the other appendices attached hereto.

The Companies

NPS Pharmaceuticals, Inc.

  NPS is engaged in the discovery and development of novel, small molecule drugs
that address a variety of important diseases.  NPS, alone or with its licensees,
is actively researching and developing drug therapies for important medical
conditions such as hyperparathyroidism and osteoporosis. In a measured way and
as resources are available, NPS is researching and developing drug therapies for
pain, epilepsy, bipolar disorder, brain damage from stroke or head trauma, and
diabetes. NPS was incorporated in the State of Utah in 1986 and reincorporated
in

                                       2
<PAGE>

the State of Delaware in 1992. NPS's principal executive office is located at
420 Chipeta Way, Salt Lake City, Utah, 84108 and its telephone number is (801)
583-4939.

Allelix Biopharmaceuticals Inc.

  Allelix is a Canadian biopharmaceutical company that applies proprietary
technologies to the identification of disease targets and to the discovery,
design, and development of novel pharmaceutical products.  Products are
commercialized in partnership with leading biotechnology and multinational
pharmaceutical companies for global markets and by Allelix itself for niche
market indications. Allelix's principal executive office is located at 6850
Goreway Drive, Mississauga, Ontario, L4V 1V7 and its telephone number is (905)
677-0831.

The NPS Special Meeting

Time, Date, and Place

  The NPS Special Meeting will be held at the Company's headquarters located at
420 Chipeta Way, Salt Lake City, Utah 84018 on December 15, 1999 at 10:00 a.m.
local time.

Purpose

  The purpose of the NPS Special Meeting is to vote upon proposals:

  1. To approve the issuance of shares of NPS Common Stock, in connection with
     the Arrangement; and

  2. To approve an amendment to the Certificate of Incorporation of NPS
     increasing the total number of shares of capital stock that the Company is
     authorized to issue from 25,000,000 shares to 50,000,000 shares, and an
     increase in the total number of shares of common stock issueable thereunder
     from 20,000,000 shares to 45,000,000 shares.

  The increase to the authorized capital stock will be implemented only if the
Arrangement is consummated. Each of NPS or Allelix may terminate the Arrangement
Agreement if either proposal is not approved. Holders of NPS Common Stock may
also consider and vote upon such other matters as may be properly brought before
the NPS Special Meeting or any postponements or adjournments thereof.

Record Date and Vote Required

  Only NPS Stockholders of record at the close of business on November 11, 1999
(the "Record Date") are entitled to vote at the NPS Special Meeting. Approval of
the issuance of shares of NPS Common Stock in connection with the Arrangement
will require approval by the affirmative vote of a majority of the shares
present or represented by proxy and entitled to vote. Approval of the amendment
to the NPS Certificate of Incorporation to increase the number of authorized
shares of capital stock requires the affirmative vote of the holders of a
majority of the outstanding shares of NPS Common Stock entitled to vote.

  This Proxy Statement and accompanying Notice of Special Meeting of
Stockholders were mailed to all NPS Stockholders of record as of the Record Date
and constitute notice of the Special Meeting in conformity with the requirements
of the Delaware General Corporation Law (the "DGCL").

The Arrangement

General

  NPS Allelix Inc., a subsidiary of NPS ("NPS Allelix") will acquire all of the
outstanding shares of common stock of Allelix (the "Allelix Common Shares").
Each holder of Allelix Common Shares who does not properly dissent in accordance
with applicable law, will receive either NPS Common Stock or shares of NPS
Allelix exchangeable into shares of NPS Common Stock on a one-for-one basis (the
"Exchangeable Shares"). Each holder who is a Canadian resident, will receive, at
his or her or its option, 0.3238 Exchangeable Shares or 0.3238 NPS

                                       3
<PAGE>

Common Shares for each Allelix Common Share held. Each holder who is not a
Canadian resident, will receive 0.3238 NPS Common Shares for each Allelix Common
Share held. Holders of Allelix Common Shares who are not Canadian residents will
not be entitled to elect to receive Exchangeable Shares. They will only receive
NPS Common Shares. As a result of the Arrangement, each outstanding share of
preferred stock of Allelix (the "Allelix Preferred Shares") convertible into
Allelix Common Shares will become convertible into NPS Common Shares. By their
terms, the Allelix Preferred Shares will convert into common shares no later
than April 30, 2000. Upon completion of the Arrangement and conversion of the
Allelix Preferred Shares, Allelix will become an indirectly wholly-owned
subsidiary of NPS.

  Each holder of warrants exercisable into Allelix Common Shares ("Allelix
Warrants") will be entitled, upon the exercise of such warrants, to receive in
lieu of the number of Allelix Common Shares to which such holder was theretofore
entitled to receive upon such exercise, that aggregate number of Exchangeable
Shares or NPS Common Shares, as applicable, that such holder would have been
entitled to receive under the Plan of Arrangement, if such holder had been the
registered holder of that number of Allelix Common Shares that such holder was
theretofore entitled to receive if all such holder's Allelix Warrants had been
exercised immediately prior to the Effective Time.

  Each holder of options exercisable into Allelix Common Shares (the "Allelix
Options") will be entitled, upon the exercise of such options, to receive in
lieu of the number of Allelix Common Shares to which such holder was theretofore
entitled to receive upon such exercise, that aggregate number of Exchangeable
Shares or NPS Common Shares, as applicable, that such holder would have been
entitled to receive under the Plan of Arrangement if such holder had been the
registered holder of that number of Allelix Common Shares that such holder was
theretofore entitled to receive if all such holder's Allelix Options had been
exercised immediately prior to the Effective Time.

Stock Ownership Following the Arrangement

  Immediately following the Arrangement, NPS and its affiliates will become the
sole beneficial owners of all of the presently outstanding Allelix Common
Shares. As of November 8, 1999 there were 20,126,232 Allelix Common Shares
outstanding. Under the Arrangement, NPS will be required to issue 6,516,874 NPS
Common Shares in exchange for the outstanding Allelix Common Shares. The Allelix
Preferred Shares will remain outstanding immediately following the Arrangement.
However, by their terms they convert to Allelix Common Shares no later than
April 30, 2000. Pursuant to the terms of the Arrangement, the Allelix Preferred
Shares will convert into NPS Common Shares instead of Allelix Common Shares. The
Allelix Preferred Shares will be convertible into a maximum of 284,269 NPS
Common Shares and possibly less, depending on the price of an NPS Common Share
on the conversion date, which is no later than April 30, 2000. Should all of the
outstanding Allelix options and warrants be exercised, and assuming issuance of
the maximum number of NPS Common Shares on conversion of the Allelix Preferred
Shares, NPS would be required to issue an additional 1,050,328 NPS Common
Shares.  On November 8, 1999 there were outstanding 12,967,719 NPS Common Shares
and options and warrants for an additional 2,103,251 NPS Common Shares.
Consequently, after completion of the Arrangement, existing holders of Allelix
Common Shares will hold approximately 33.4% of the outstanding NPS Common Shares
and assuming exercise of all options and warrants of both Allelix and NPS and
conversion to NPS Common Shares of the Allelix Preferred Shares approximately
33.4% of the NPS Common Shares.

Effective Time

  It is anticipated that the Arrangement will become effective after the
required NPS Stockholder, Allelix stockholder, and Canadian court approvals have
been obtained and are final and all other conditions to closing have been
satisfied or waived (the "Effective Time"). As of the date hereof, NPS and
Allelix anticipate that the Arrangement will become effective late December
1999.

The Exchangeable Shares

  The Exchangeable Shares will be securities of NPS Allelix that are, as nearly
as practicable, the voting and economic equivalent of NPS Common Shares. The
holders of Exchangeable Shares will have the following rights pursuant to the
conditions attaching to the Exchangeable Shares, the Support Agreement, and the
Voting and Exchange Trust Agreement:

                                       4
<PAGE>

 . the right to exchange such shares for NPS Common Shares on a one-for-one basis
  as discussed below;

 . the right to receive dividends, on a per share basis, in amounts (or property
  in the case of non-cash dividends) which are the same as, and which are
  payable at the same time as, dividends declared on NPS Common Shares;

 . the right to vote, on a per share equivalent basis, at all stockholder
  meetings at which NPS Common Shares are entitled to vote pursuant to the terms
  of a special voting share in the capital of NPS carrying that number of votes
  which is equal to the number of outstanding Exchangeable Shares (which are not
  held by NPS or its affiliates); and

 . the right to participate, on a per share equivalent basis, in a liquidation,
  dissolution, or other winding-up of NPS, on a pro rata basis with the holders
  of NPS Common Shares in the distribution of assets of NPS pursuant to the
  terms of a mandatory exchange of Exchangeable Shares for NPS Common Shares.

  The Exchangeable Shares will have no separate economic or voting rights in NPS
Allelix, except as required by law or contractual right.

  The Exchangeable Shares are redeemable by NPS Allelix at any time on or after
December 31, 2004, or any time on or after the date that there are fewer than
1,000,000 Exchangeable Shares outstanding, or on or after the occurrence of a
NPS Control Transaction as defined herein.  The Exchangeable Shares may be
redeemed by delivery to each holder of Exchangeable Shares one NPS Common Share
for each Exchangeable Share held by such holder, together with the dividend
amount applicable to such Exchangeable Shares if any such dividend amount
exists.

NPS's Reasons for the Arrangement

  The NPS Board of Directors considered a wide variety of information and a
number of factors in connection with its evaluation of the proposed Arrangement,
and determined that the Arrangement provides an opportunity that serves the best
interests of NPS and its stockholders. The NPS Board of Directors believes that
the Arrangement may result in a number of benefits to NPS and its stockholders,
including, among other benefits, the following:

 . the combined company's increased pipeline of drug targets is expected to
  increase the probability of finding and developing safe and efficacious drug
  candidates and improve the combined company's competitive position;

 . the Arrangement will combine NPS's and Allelix's complementary scientific
  expertise and product discovery opportunities which may lead to increased
  product opportunities;

 . the ability of the combined company to operate more efficiently and thereby
  efficiently utilize capital resources;

 . the potential access to greater financial resources and more collaborative
  agreements would provide increased flexibility and enhance the efficiency of
  research and development efforts;

 . the combined company will have late stage product candidates appropriate for
  development and marketing by NPS directly; and

 . the combined company will have a greater choice of late stage clinical
  programs over which to deploy limited resources and thereby will be better
  able to manage the inherent risks of the industry in general and NPS in
  particular. See "Approval of the Arrangement -- NPS's Reasons for the
  Arrangement."

Recommendation of the Board of Directors of NPS

  The NPS Board of Directors unanimously approved the Arrangement Agreement and
recommends that NPS Stockholders vote in favor of the issuance of shares of NPS
Common Stock in connection with the Arrangement. The NPS Board of Directors also
unanimously recommends a vote in favor of the amendment to NPS's Certificate of
Incorporation.

                                       5
<PAGE>

Opinion of NPS's Financial Advisor, Prudential Securities

  Prudential Securities Incorporated ("Prudential Securities") delivered an
opinion, dated September 27, 1999 (the "Prudential Securities Opinion") to the
NPS Board of Directors that, as of the date of such opinion and subject to the
various considerations set forth therein, the exchange ratio of 0.3238 NPS
Common Shares or 0.3238 Exchangeable Shares, as the case may be, for one Allelix
Common Share, was fair from a financial point of view to NPS. The full text of
the Prudential Securities Opinion, which sets forth, among other things,
assumptions made, procedures followed, matters considered and limitations on the
scope of the review undertaken in connection with such opinion, is attached
hereto as Appendix D and is incorporated herein by reference. Holders of NPS
common stock are urged to, and should, read the Prudential Securities Opinion in
its entirety. See "Approval of the Arrangement -- Opinion of Financial Advisor
to NPS."

Conditions to Closing

  The Arrangement Agreement provides that the parties' obligations to complete
the Arrangement are subject to the satisfaction, on or before the Effective Date
or such other time as specified, of certain conditions precedent, each of which
may only be waived by the mutual consent of NPS and Allelix. These conditions
precedent include, among others:

 . the Arrangement must have been duly approved by the required majority of
  Allelix stockholders, on or before January 20, 2000;

 . each of the resolutions considered at the NPS Special Meeting shall have been
  duly approved by the required majority of holders of NPS Common Shares without
  amendment on or before January 20, 2000;

 . the Superior Court of Justice for the Province of Ontario, Canada, shall have
  issued a Final Order approving the Arrangement in form and substance
  satisfactory to Allelix and NPS, acting reasonably, on or before January 31,
  2000, and such Final Order shall not have been set aside or modified in a
  manner unacceptable to such parties on appeal or otherwise; and

 . holders of not more than 10% of Allelix's Common shares shall have exercised
  rights of dissent in respect of the matters considered at the meeting of
  Allelix stockholders held to consider the Arrangement.

Termination

  The Arrangement Agreement may be terminated in certain circumstances,
including:

 . by NPS if the Board of Directors of Allelix has withdrawn or varied, in a
  manner determined by NPS to be adverse to NPS, approval of the Arrangement
  Agreement or the Arrangement or its unanimous recommendation to the holders of
  Allelix Common Shares;

 . by Allelix if the Board of Directors of NPS has withdrawn its unanimous
  recommendation to the holders of the NPS Common Shares to vote in favor of the
  resolutions contemplated in the Arrangement Agreement to be considered at the
  NPS Special Meeting;

 . by Allelix in order to enter into a definitive written agreement with an
  unrelated third party with respect to a Superior Proposal (as defined in the
  Arrangement Agreement); subject to compliance with certain conditions;

 . by the mutual agreement between NPS and Allelix; and

 . by either NPS or Allelix if there shall be passed any law or regulation that
  makes consummation of the transactions contemplated by the Arrangement illegal
  or otherwise prohibited.

                                       6
<PAGE>

Termination Fees and Expenses

  Allelix is obligated to pay to NPS a fee of U.S.$2,000,000 in the event that:

 . Allelix breaches its covenants or agreements in the Arrangement Agreement in
  any material respect;

 . NPS terminates the Arrangement Agreement because the Board of Directors of
  Allelix has withdrawn or varied, in a manner determined by NPS to be adverse
  to NPS, its approval of the Arrangement Agreement or the Arrangement or its
  unanimous recommendation to the holders of Allelix Common Shares unless the
  Board of Directors of Allelix has done so because of a material adverse change
  affecting NPS, and such change is not attributable to a material adverse
  change affecting Allelix;

 . Allelix terminates the Arrangement Agreement to enter into a definitive
  written agreement with respect to a Superior Proposal made by an unrelated
  third party, subject to compliance with certain conditions; or

 . an Acquisition Proposal (as defined in the Arrangement Agreement) is announced
  and is not withdrawn more than two business days prior to the date of the
  Allelix Special Meeting, the holders of the Allelix Common Shares do not
  approve the Arrangement at the Allelix Special Meeting, and a significant
  transaction involving the acquisition of a material portion of the assets of
  Allelix or Allelix Common Shares is completed with the party that made the
  Acquisition Proposal or an affiliate of such party within the twelve months
  following the date of the Allelix Special Meeting.

  NPS is obligated to pay  to Allelix a fee of U.S.$1,000,000 in the event that:

 . NPS breaches a covenant or agreement on its part in the Arrangement Agreement
  in any material respect; or

 . The holders of the NPS Common Shares do not approve the matters relating to
  the Arrangement considered at the NPS Special Meeting except following a
  material adverse change affecting Allelix.

  The fee shall be increased to U.S.$2,000,000 in the event that the Board of
Directors of NPS withdraws or varies its unanimous recommendation to the holders
of NPS Common Shares in a manner determined by Allelix to be adverse to Allelix,
otherwise than because of a material adverse change affecting Allelix.

Accounting Treatment

  The transaction contemplated by the Arrangement Agreement is intended to be
accounted for as a purchase for financial reporting purposes in accordance with
U.S. generally accepted accounting principles. See "Approval of the Arrangement
- -- Anticipated Accounting Treatment."

Stock Exchange Listings

  The TSE has conditionally approved the listing of the Exchangeable Shares
subject to satisfaction of its customary requirements. The NPS Common Shares
issued in connection with the Arrangement, including those shares issuable from
time to time in exchange for Exchangeable Shares, and upon exercise of options
and warrants, will be listed for trading on the Nasdaq Stock Market.

Certain Federal Income Tax Considerations

  The Company believes there should be no federal income tax consequences to the
Company as a result of the Arrangement. The Company's conclusion is based on the
determination that the Exchangeable Shares issued in connection with the
Arrangement constitute stock of NPS Allelix for federal income tax purposes, and
that the shares of NPS common stock issuable pursuant to the terms and
conditions of the Exchangeable Shares will be deemed to have a tax basis equal
to their fair market value at the time of issuance. These conclusions are based
on the federal income tax laws currently in effect, including the Internal
Revenue Code of 1986, as amended, final and proposal Treasury Regulations,
published rulings and administrative practices of the Internal Revenue Service
(the "Service") and court decisions which are subject to change, and in some
cases not binding on the Service or the court. Any change could alter the tax
consequences to NPS. No advance income tax rulings have been sought from

                                       7
<PAGE>

the Service with respect to any of the transactions described herein. If the
Service were to successfully challenge the Company's determinations described
above, the Company may be required to recognize taxable income in an amount
equal to the value of the Exchangeable Shares or NPS Common Stock issued on
exchange of the Exchangeable Shares determined at the time of issuance.

Dissent Rights

  NPS:  NPS Stockholders are not entitled to appraisal rights under the DGCL.

  Allelix:  Under Canadian law, each registered holder of Allelix Common Shares
and/or Allelix Preferred Shares is entitled to dissent from the Arrangement and
to be paid by Allelix the court approved amount, if the Arrangement as
applicable becomes effective. The dissenting procedure requires that the court
determine the fair value of the Allelix Common Shares or Allelix Preferred
Shares, as applicable, held by such holder in respect of which such holder
dissents. Such value is to be determined as of the day before the date on which
the Arrangement is approved by the Allelix stockholders.

Non-Solicitation

  Pursuant to the Arrangement Agreement, Allelix and NPS each have agreed that
prior to the completion of the Arrangement, or the earlier termination of the
Arrangement Agreement, they will not directly or indirectly take certain actions
that may encourage a material transaction involving its assets or securities.
However, NPS and Allelix may each furnish information and enter into discussions
or negotiations in response to a bona fide, unsolicited Acquisition Proposal if
and only to the extent that the board of directors of the company receiving the
proposal determines in good faith that the proposal is reasonably likely to
result in an offer superior to the one proposed in the Arrangement Agreement,
and after consultation with its outside counsel that such action is required in
order for the relevant board of directors to comply with its fiduciary
obligations. See "The Arrangement Agreement--Covenants--Non-Solicitation."

Interests of Certain Persons in The Arrangement

  The Arrangement Agreement provides that all rights to indemnification existing
in favor of the persons serving as directors and officers of Allelix as of the
date of the Arrangement Agreement for acts or omissions occurring prior to the
Effective Time, as provided in the bylaws of Allelix will survive the
Arrangement. Subject to certain limitations, NPS has also agreed to maintain in
effect for seven years after the Effective Time a policy of directors' and
officers' liability insurance on substantially the same terms as to coverage and
deductibles and other terms as Allelix had in place prior to the Arrangement,
for the benefit of persons serving as directors and officers of Allelix as of
such date.

Risk Factors

  The Arrangement involves a high degree of risk. NPS Stockholders should
consider the risk factors set forth in section "Risk Factors" discussed
elsewhere in this Proxy Statement and in the documents incorporated herein by
reference in determining whether or not to vote in favor of the matters to be
considered at the NPS Special Meeting.

                                       8
<PAGE>

             SELECTED HISTORICAL FINANCIAL INFORMATION OF ALLELIX

  The selected financial data presented below under the caption "Balance Sheet
Data" and "Statement of Operations Data" for, and as of the end of, each of the
years in the five-year period ended August 31, 1999, are derived from the
consolidated financial statements of Allelix, prepared in accordance with
Canadian GAAP, which financial statements have been audited by Ernst & Young
LLP, independent chartered accountants.  The consolidated financial statements
as of August 31, 1999 and 1998 and for each of the years in the two-year period
ended August 31, 1999, and the report thereon, are included in this Proxy
Statement and reference should be made to these financial statements, including
the notes thereto.

<TABLE>
<CAPTION>
                                             1999       1998       1997       1996       1995
                                             ----       ----       ----       ----       ----
                                                 (Cdn.$ thousands, except per share data)
BALANCE SHEET DATA
<S>                                         <C>        <C>        <C>         <C>       <C>
Total assets.............................   $ 50,539   $ 77,628   $ 95,764    $47,601   $ 30,483
Long-term debt (net of current portion)..      2,296          -          -          -          -
Shareholders' equity.....................     39,527     68,472     83,158     41,921     26,497

STATEMENT OF OPERATIONS DATA
Revenue..................................   $ 13,684   $ 27,720   $ 15,083    $17,901   $  7,866
Net loss.................................    (38,595)   (21,764)   (15,953)    (6,779)   (12,759)

Per common share
     Net loss - basic and diluted........    $(2.02)  $  (1.21)  $  (1.11)   $ (0.57)   $  (1.20)
</TABLE>


                SELECTED HISTORICAL FINANCIAL INFORMATION OF NPS

  The selected data presented below under the captions "Balance Sheet Data" and
"Statement of Operations Data" for, and as of the end of, each of the years in
the five-year period ended December 31, 1998, are derived from the financial
statements of NPS, which financial statements have been audited by KPMG LLP,
independent certified public accountants. The financial statements as of
December 31, 1998 and 1997, and for each of the years in the three-year period
ended December 31, 1998, and the report thereon, are incorporated by reference
elsewhere in this Proxy Statement.

<TABLE>
<CAPTION>
                                               1998       1997       1996      1995       1994
                                               ----       ----       ----      ----       -----
                                                (U.S.$ thousands, except per share data)
BALANCE SHEET DATA
<S>                                         <C>        <C>         <C>       <C>        <C>
Total assets............................    $ 48,111   $ 62,634    $72,160   $10,600    $12,084
Long-term capital leases and long-term            32         65        327       747        440
     debt (net of current portions).....
Shareholders' equity....................      45,146     62,634     69,870     7,322     10,165

STATEMENT OF OPERATIONS DATA
Revenue.................................  $    3,568   $  5,842    $20,342   $ 9,562    $ 3,861
Net income (loss).......................     (17,162)   (11,694)     6,105    (3,318)    (6,756)

Per common share
     Net income (loss) - basic..........  $   (1.39)  $  (0.98)   $  0.59   $ (0.48)   $ (1.13)
     Net income (loss) - diluted........      (1.39)     (0.98)      0.55     (0.48)     (1.13)
</TABLE>

                                       9
<PAGE>

       UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION

  The following pages 11 through 18 contain the Unaudited Pro Forma Condensed
Consolidated Balance Sheet as of September 30, 1999, the Unaudited Pro Forma
Condensed Consolidated Statements of Operations for the year ended December 31,
1998 and the nine months ended September 30, 1999 and the notes thereto.

  The following Unaudited Pro Forma Condensed Consolidated Financial Statements
give effect to the Arrangement to be accounted for using the purchase method of
accounting, whereby the total cost of the Arrangement will be allocated to the
tangible and intangible assets acquired and liabilities assumed based upon their
respective fair values. The Unaudited Pro Forma Condensed Consolidated Financial
Statements have been prepared on the basis of assumptions described in the notes
thereto, including assumptions related to the allocation of the total purchase
cost to the assets and liabilities of Allelix based upon preliminary estimates
of fair value.  The actual allocation may differ significantly from those
assumptions after valuations and other procedures are completed after the
closing of the Arrangement.

  The Unaudited Pro Forma Condensed Consolidated Statements of Operations were
prepared as if the Arrangement occurred as of January 1, 1998.  The Unaudited
Pro Forma Condensed Consolidated Balance Sheet was prepared as if the
Arrangement occurred as of September 30, 1999.  These statements are not
necessarily indicative of what the actual operating results or financial
position would have been had the Arrangement occurred on the dates and for the
periods indicated and do not purport to indicate future results of operations.
In addition, they do not reflect any cost savings or other synergies resulting
from the Arrangement.

  The Unaudited Pro Forma Condensed Consolidated Financial Statements should be
read in conjunction with the historical financial statements and related notes
of NPS incorporated by reference and the historical financial statements and
related notes of Allelix included elsewhere in this Proxy Statement.


             (The remainder of this page intentionally left blank)

                                       10
<PAGE>

         NPS PHARMACEUTICALS, INC. AND ALLELIX BIOPHARMACEUTICALS INC.
           Unaudited Pro Forma Condensed Consolidated Balance Sheet
                              September 30, 1999
                                (in thousands)

<TABLE>
<CAPTION>
                                                                     NPS             Allelix
                                                                  (September       (August 31,      Pro Forma           Pro Forma
               Assets                                              30, 1999)         1999)         adjustments           combined
                                                                  ------------     ----------      -----------          ----------
<S>                                                               <C>              <C>             <C>                  <C>
Current assets:
   Cash and cash equivalents                                       $    13,385         2,628           (2,250) (a)          13,763
   Marketable investment securities                                     15,064        13,921                                28,985
   Accounts receivable                                                     104           309                -                  413
   Other current assets                                                    114         1,572                -                1,686
                                                                  ------------     ---------       ----------           ----------

          Total current assets                                          28,667        18,430           (2,250)              44,847

Plant, property, and equipment:
   Land                                                                      -           435                -                  435
   Building                                                                  -         1,206              (21) (i)           1,185
   Equipment                                                             6,576         3,521           (1,705) (i)           8,392
   Leasehold improvements                                                3,214         1,207             (125) (i)           4,296
                                                                  ------------     ---------       ----------           ----------

                                                                         9,790         6,369           (1,851)              14,308

   Less accumulated depreciation and amortization                        5,684         1,851           (1,851)               5,684
                                                                  ------------     ---------       ----------           ----------

          Net plant and equipment                                        4,106         4,518                -                8,624

Restricted marketable investment securities                                  -           757                -                  757
Equity investments                                                           -         1,942            2,402  (f)           1,194
                                                                                                       (3,150) (c)
Goodwill and identifiable intangibles                                        -         7,226           (7,226) (e)          12,567
                                                                                                       12,567  (a)
Other assets                                                                 3            76                -                   79
                                                                  ------------     ---------       ----------           ----------

                                                                  $     32,776        32,949            2,343               68,068
                                                                  ============     =========       ==========           ==========
          Liabilities and Stockholders' Equity

Current liabilities:
   Current installments of obligations under capital leases       $         23           381                -                  404
   Accounts payable                                                      1,037         3,219              750 (a)            5,006
   Accrued expenses                                                      1,287         1,044                -                2,331
   Due to related parties                                                    -           169                -                  169
   Deferred income                                                         293           444                -                  737
                                                                  ------------     ---------       ----------           ----------

          Total current liabilities                                      2,640         5,257              750                8,647

Obligations under capital leases, excluding current installments            17           445                -                  462
Long-term debt                                                               -         1,538                -                1,538
                                                                  ------------     ---------       ----------           ----------

                         Total liabilities                               2,657         7,240              750               10,647

Stockholders' equity                                                    30,119        25,709           46,762  (a)          57,421
                                                                                                      (25,709) (b)
                                                                                                      (16,310) (a)(c)
                                                                                                       (3,150) (c)
                                                                  ------------     ---------       ----------           ----------

                                                                  $     32,776        32,949            2,343               68,068
                                                                  ============     =========       ==========           ==========
</TABLE>

 See Notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                       11
<PAGE>

         NPS PHARMACEUTICALS, INC. AND ALLELIX BIOPHARMACEUTICALS INC.

      Unaudited Pro Forma Condensed Consolidated Statement of Operations

                     For the year ended December 31, 1998
              (in thousands, except shares and per share amount)
<TABLE>
<CAPTION>
                                                                    NPS           Allelix
                                                                (Year ended     (Year ended
                                                                  December       November 30,     Pro Forma          Pro Forma
                                                                  31, 1998)         1998)        adjustments          combined
                                                                -------------   -------------   -------------       -------------
<S>                                                             <C>             <C>             <C>                 <C>
Revenues:
   Research and license agreements                              $       3,568               -               -               3,568
   Collaborative and contract                                               -           8,588               -               8,588
                                                                -------------   -------------   -------------       -------------

          Total revenues                                                3,568           8,588               -              12,156
                                                                -------------   -------------   -------------       -------------

Operating expenses:
   Research and development                                            17,857          20,058               -              37,915
   General and administrative                                           5,546           6,685               -              12,231
   Amortization of goodwill and identifiable intangibles                    -           7,124           2,533  (d)          2,533
                                                                                                       (7,124) (e)
                                                                -------------   -------------   -------------       -------------
          Total operating expenses                                     23,403          33,867          (4,591)             52,679
                                                                -------------   -------------   -------------       -------------

          Operating loss                                               19,835          25,279          (4,591)             40,523

Other income (expense):
   Interest income                                                      2,365           1,390            (180) (g)          3,575
   Interest expense                                                       (16)           (171)              -                (187)
   Foreign exchange gain                                                    -             981               -                 981
   Loss from equity investments                                             -          (3,383)          1,337  (j)         (2,255)
                                                                                                         (209) (h)
   Gain on marketable investment securities                               323               -               -                 323
                                                                -------------   -------------   -------------       -------------

          Total other income (loss)                                     2,672          (1,183)            948               2,437
                                                                -------------   -------------   -------------       -------------

          Net loss                                              $      17,163          26,462          (5,539)             38,086
                                                                =============   =============   =============       =============

Net loss per common and common-equivalent share - basic
   and diluted                                                  $        1.39                                                1.99
                                                                =============                                       =============
Weighted average common and common-equivalent shares
   outstanding - basic and diluted                                 12,337,200                       6,801,127          19,138,327
                                                                =============                   =============       =============
</TABLE>

 See Notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                       12
<PAGE>

         NPS PHARMACEUTICALS, INC. AND ALLELIX BIOPHARMACEUTICALS INC.

      Unaudited Pro Forma Condensed Consolidated Statement of Operations

              For the nine month period ended September 30, 1999
              (in thousands, except shares and per share amount)

<TABLE>
<CAPTION>
                                                                NPS             Allelix
                                                            (Nine months     (Nine months
                                                                ended            ended
                                                            September 30,      August 31,       Pro Forma          Pro Forma
                                                                1999)            1999)         adjustments         combined
                                                            -------------    -------------    -------------      -------------
<S>                                                         <C>              <C>              <C>                <C>
Revenues:
   Research and license agreements                          $       2,745                -                -              2,745
   Collaborative and contract                                           -            6,236                -              6,236
                                                            -------------    -------------    -------------      -------------

          Total revenue                                             2,745            6,236                -              8,981
                                                            -------------    -------------    -------------      -------------

Operating expenses:
   Research and development                                        15,002           12,049                -             27,051
   General and administrative                                       4,440            5,135                -              9,575
   Amortization of goodwill and identifiable intangibles                -            5,496            1,900  (d)         1,900
                                                                                                     (5,496) (e)
                                                            -------------    -------------    -------------      -------------
          Total operating expenses                                 19,442           22,680           (3,596)            38,526
                                                            -------------    -------------    -------------      -------------

          Operating loss                                           16,697           16,444           (3,596)            29,545

Other income (expense):
   Interest income                                                  1,266              760             (135) (g)         1,891
   Interest expense                                                    (4)            (141)               -               (145)
   Foreign exchange loss                                                -             (412)               -               (412)
   Loss from equity investments                                         -           (3,042)           1,201  (j)        (1,998)
                                                                                                       (157) (h)
                                                            -------------    -------------    -------------      -------------

          Total other income (loss)                                 1,262           (2,835)             909               (664)
                                                            -------------    -------------    -------------      -------------

          Net loss                                          $      15,435           19,279           (4,505)            30,209

Amortization of beneficial conversion feature                           -              265             (265) (k)             -
                                                            -------------    -------------    -------------      -------------

          Loss attributable to common shareholders          $      15,435           19,544           (4,770)            30,209
                                                            =============    =============    =============      =============

Net loss per common and common-equivalent share - basic
   and diluted                                              $        1.22                                                 1.55
                                                            =============                                        =============
Weighted average common and common-equivalent shares
   outstanding - basic and diluted                             12,664,900                         6,801,127         19,466,027
                                                            =============                     =============      =============
</TABLE>

 See Notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                       13
<PAGE>

   NOTES to Unaudited Pro Forma Condensed Consolidated Financial Statements


(1)  Basis of Presentation

     On September 27, 1999, NPS entered into a definitive agreement to acquire
Allelix, pursuant to which Allelix will merge with and into an acquisition
subsidiary of NPS. The Arrangement described herein provides for the combination
of NPS and Allelix in a transaction in which each holder of Allelix Common
Shares who is a Canadian resident will be entitled to receive, at its option,
0.3238 NPS Common Shares, or 0.3238 Exchangeable Shares for each Allelix Common
Share held, and each holder of Allelix Common Shares who is not a Canadian
Resident will be entitled to receive 0.3238 NPS Common Shares for each Allelix
Common Share held. Based on 21,004,098 common shares (including the assumed
conversion of the Allelix Preferred Shares) of Allelix outstanding at September
27, 1999, NPS would issue approximately 6.8 million shares valued at
approximately $44.68 million, assuming a transaction stock price of $6.57. NPS
will also assume outstanding Allelix stock options and warrants with an
estimated fair value of approximately $2.08 million. The fair value of those
options and warrants was estimated using the Black-Scholes option pricing model.

     In preparing the Unaudited Pro Forma Condensed Consolidated Balance Sheet,
the balances for NPS and Allelix were as of September 30, 1999 and August 31,
1999, respectively. The NPS and Allelix Statement of Operations were for the
nine months ended September 30, 1999 and August 31, 1999, respectively, and the
twelve months ended December 31, 1998 and November 30, 1998, respectively. The
different dates resulted from the different year ends that the two companies
utilize and do not have a significant impact on the Unaudited Pro Forma
Condensed Consolidated Financial Statements.

(2)  Purchase Price Allocation and Pro Forma Adjustments

     The adjustments to arrive at the Unaudited Pro Forma Condensed Consolidated
Financial Statements are as follows:

     (a)  The Arrangement will be accounted for under the purchase method of
          accounting. In accordance with generally accepted accounting
          principles, the portion of the purchase price allocable to in-process
          research and development projects of Allelix will be expensed at the
          consummation of the Arrangement. The amount of the one-time
          nonrecurring charge for in-process research and development is
          expected to be approximately $19.46 million (which consists of $16.31
          million relating to NPS's acquisition of Allelix and $3.15 million
          relating to Allelix's equity investment in Allelix PharmEco LP). Since
          this charge is directly related to the Arrangement and will not recur,
          the Unaudited Pro Forma Condensed Consolidated Statements of
          Operations have been prepared excluding this charge. NPS has not yet
          determined the final allocation of the purchase price and,
          accordingly, the amount shown below may differ significantly from the
          ultimate allocation.

          Goodwill and identifiable intangibles in the amount of $12.57 million
          were calculated as follows (all numbers in thousands except share
          amounts):

               Total estimated purchase price ($2,250 cash,
                    which relates to estimated Merger costs
                    of NPS, plus $46,762 representing the
                    sum of the estimated market value of
                    6,801,127 shares of NPS Common Stock
                    issued as consideration in the amount of
                    $44,683 and $2,079 in fair value for NPS
                    stock options issued in exchange for
                    outstanding warrants and options of
                    Allelix)                                         $ 49,012
               Less:
                    Estimated fair value of net assets
                    acquired other than in-process research
                    and development (comprised of Allelix's
                    historical stockholders equity of
                    $25,709, less: previously existing
                    goodwill and identifiable intangibles of
                    $7,226, the net book value reduction to
                    fair value of $748 in the equity
                    investments, and estimated Allelix
                    Arrangement costs of $750)                        (16,985)
                    Expensed in-process research and development      (19,460)
               Goodwill and identifiable intangibles (goodwill-      --------
                    $5,517, patents-$6,370, assembled workforce-
                    $680)                                            $ 12,567
                                                                     ========


_________

*This value includes the conversion of the Allelix Preferred Shares to Allelix
common shares and eventual conversion to NPS common shares

                                       14
<PAGE>

   NOTES to Unaudited Pro Forma Condensed Consolidated Financial Statements


     (b)  Elimination of Allelix's stockholders' equity accounts.

     (c)  Stockholders' equity adjustments for the nonrecurring charge related
          to the write-off of in-process research and development projects
          acquired, including the write-off of in-process research and
          development projects associated with equity investments.

     (d)  Amortization of goodwill and identifiable intangibles recognized in
          the purchase of Allelix will be recognized on a straight-line basis
          over the following estimated useful lives:

               Goodwill                 6 years
               Patents                  5 years
               Assembled workforce      2 years

     (e)  Elimination of previously existing goodwill and other identifiable
          intangibles and amortization thereon of Allelix.

     (f)  Write up of equity investments acquired to estimated fair value.

     (g)  Decrease in interest income as a result of the reduction in cash that
          would have occurred to effectuate the merger.

     (h)  Amortization of goodwill recognized in the purchase of Allelix's
          equity investments (which is included as part of the equity
          investments line item on the accompanying balance sheet) will be
          recognized on a straight-line basis over six years.

     (i)  Elimination of the accumulated depreciation and amortization related
          to Allelix's plant and equipment.

     (j)  Elimination of amortization of historical excess of cost over
          underlying book value of investees.

     (k)  Elimination of amortization of beneficial conversion feature on
          Allelix Preferred Shares based on the assumed conversion of Preferred
          Shares to Common Shares.

(3)  Common Shares Outstanding

     Basic and diluted net loss per common share, have been calculated based
upon the pro forma weighted average shares outstanding for each period
presented. NPS historical weighted average shares outstanding was increased in
each period by the number of Allelix Common Shares outstanding at September 27,
1999, (including the assumed conversion of the Allelix Preferred Shares)
multiplied by the Exchange Ratio of 0.3238, as if the converted shares were
outstanding for the entire period.

(4)  Conversion of Allelix Historical Financial Statements

     The Unaudited Pro Forma Condensed Consolidated Financial Statements are
presented in U.S. dollars and in accordance with U.S. GAAP. Thus, Allelix's
statements of operations for the year ended November 30, 1998, and for the nine
months ended August 31, 1999, were converted from Cdn$ to U.S.$ using an average
exchange rate for each period (U.S.$0.6788 per Cdn$1 and U.S.$0.668 per Cdn$1,
respectively). Allelix's balance sheet was converted from Cdn$ to U.S.$ using
the exchange rate effective on August 31, 1999, for assets and liabilities
(U.S.$0.67 per Cdn$1), except for the shareholders' equity accounts which were
translated at historical exchange rates. Certain adjustments were necessary to
convert Allelix's historical financial statements prepared in accordance with
Canadian GAAP to U.S. GAAP. The following schedules present the conversion of
Allelix's financial information from Canadian dollars and Canadian GAAP into
U.S. dollars and U.S. GAAP.

                                       15
<PAGE>

   NOTES to Unaudited Pro Forma Condensed Consolidated Financial Statements


(4)  Conversion of Allelix Biopharmaceuticals' Historical Financial Statements
     (continued)

                                 Balance Sheet
                                August 31, 1999
                                (in thousands)

<TABLE>
<CAPTION>
                                                                            Canadian       U.S. GAAP      U.S. GAAP
Assets                                                                     GAAP Cdn.$        Cdn.$          U.S.$
                                                                           ----------     ----------     ----------
<S>                                                                        <C>            <C>            <C>
Current assets:
   Cash and cash equivalents (I)                                           $    3,952          3,923          2,628
   Marketable investment securities (II)                                       20,836         20,776         13,921
   Accounts receivable                                                            461            461            309
   Other current assets                                                         2,346          2,346          1,572
                                                                           ----------     ----------     ----------

          Total current assets                                                 27,595         27,506         18,430

Property, plant, and equipment:
   Land                                                                           650            650            435
   Building                                                                     1,800          1,800          1,206
   Equipment                                                                    5,255          5,255          3,521
   Leasehold improvements                                                       1,801          1,801          1,207
                                                                           ----------     ----------     ----------

                                                                                9,506          9,506          6,369

   Less accumulated depreciation and amortization                               2,763          2,763          1,851
                                                                           ----------     ----------     ----------

          Net plant and equipment                                               6,743          6,743          4,518

Restricted marketable investment security                                       1,130          1,130            757
Equity investments (I)                                                            216          2,899          1,942
Research and development acquired, goodwill, and
   identifiable intangibles (I)(VI)                                            14,741         10,785          7,226
Other assets                                                                      114            114             76
                                                                           ----------     ----------     ----------

                                                                           $   50,539         49,177         32,949
                                                                           ==========     ==========     ==========

Liabilities and Stockholders' Equity

Current liabilities:
   Current installments of obligations under capital leases                $      569            569            381
   Accounts payable (I)                                                         4,936          4,804          3,219
   Accrued expenses (I)                                                         1,633          1,558          1,044
   Due to related parties                                                         252            252            169
   Deferred income                                                                662            662            444
                                                                           ----------     ----------     ----------

          Total current liabilities                                             8,052          7,845          5,257

Obligations under capital leases, excluding current installments                  664            664            445
Long-term debt                                                                  2,296          2,296          1,538
                                                                           ----------     ----------     ----------

          Total liabilities                                                    11,012         10,805          7,240

Stockholders' equity (II)(III)(IV)(V)                                          39,527         38,372         25,709
                                                                           ----------     ----------     ----------

                                                                               50,539         49,177         32,949
                                                                           ==========     ==========     ==========
</TABLE>

                                       16
<PAGE>

   NOTES to Unaudited Pro Forma Condensed Consolidated Financial Statements


(4)  Conversion of Allelix Biopharmaceuticals' Historical Financial Statements
     (continued)

                           Statements of Operations
                                (in thousands)

<TABLE>
<CAPTION>
                                                                 Canadian        U.S. GAAP      U.S. GAAP
For the year ended November 30, 1998:                           GAAP Cdn.$         Cdn.$          U.S.$
                                                                ----------      ----------     ----------
<S>                                                             <C>             <C>            <C>
Collaborative and contract revenue (I)                          $   12,173          12,652          8,588

Operating expenses:
   Research and development (I)(II)(III)                            31,560          29,551         20,058
   General and administrative                                        9,848           9,848          6,685
   Amortization of goodwill and identifiable intangibles (VI)       13,659          10,494          7,124
                                                                ----------      ----------     ----------

          Total operating expenses                                  55,067          49,893         33,867
                                                                ----------      ----------     ----------

          Operating loss                                            42,894          37,241         25,279

Other income (expense):
   Interest income                                                   2,048           2,048          1,390
   Interest expense                                                   (252)           (252)          (171)
   Foreign exchange gain (I)                                         1,368           1,445            981
   Loss from equity investment (I)                                    (449)         (4,984)        (3,383)
                                                                ----------      ----------     ----------

          Total other income (loss)                                  2,715          (1,743)        (1,183)
                                                                ----------      ----------     ----------

          Net loss                                              $   40,179          38,984         26,462
                                                                ==========      ==========     ==========

For the nine months ended August 31, 1999:

Collaborative and contract revenue (I)                          $    8,964           9,334          6,236

Operating expenses:
   Research and development (I)(III)(VI)                            19,060          18,036         12,049
   General and administrative                                        7,687           7,687          5,135
   Amortization of goodwill and identifiable intangibles (VI)       10,921           8,227          5,496
                                                                ----------      ----------     ----------

          Total operating expenses                                  37,668          33,950         22,680
                                                                ----------      ----------     ----------

          Operating loss                                            28,704          24,616         16,444

Other income (expense):
   Interest income                                                   1,137           1,137            760
   Interest expense                                                   (211)           (211)          (141)
   Foreign exchange loss (I)                                          (604)           (616)          (412)
   Loss from equity investment (I)                                  (1,280)         (4,553)        (3,042)
                                                                ----------      ----------     ----------

          Total other loss                                            (958)         (4,243)        (2,835)
                                                                ----------      ----------     ----------

          Net loss                                              $   29,662          28,859         19,279

Amortization of beneficial conversion feature (VII)                      -             397            265
                                                                ----------      ----------     ----------

          Loss attributable to common shareholders              $   29,662          29,256         19,544
                                                                ==========      ==========     ==========
</TABLE>

                                       17
<PAGE>

   NOTES to Unaudited Pro Forma Condensed Consolidated Financial Statements

(I)    Under Canadian GAAP, Allelix's interest in a jointly controlled entity is
       accounted for using the proportional method of consolidation. For
       purposes of U.S. GAAP, this interest would be accounted for by the equity
       method. Net loss and deficit under U.S. GAAP are not impacted by the
       proportionate consolidation of this interest in a jointly controlled
       entity.

(II)   Under Canadian GAAP, cash and marketable securities are recorded at cost
       plus accrued interest that approximates market value. Under U.S. GAAP,
       the unrealized gains or losses on available for sale marketable
       securities are recorded as a component of stockholders' equity.

(III)  Under Canadian GAAP, when stock options are granted to individuals, the
       value of the options are not recorded unless there is intrinsic value at
       the date of grant associated with the options. U.S. GAAP does, however,
       require stock option transactions with non-employees to be recorded as
       compensation expense and measured at the fair value of the consideration
       received or the compensation paid, whichever is more reliably measured.
       The fair value of the options granted to non-employees have been
       estimated at the date of grant using the Black-Scholes option pricing
       model.

(IV)   Canadian GAAP permits the recording of share issue costs as an increase
       in accumulated deficit. U.S. GAAP requires the share issue costs to be
       accounted for in share capital as a reduction to the proceeds received
       from the share issue.

(V)    Under Canadian GAAP, the Company has included a gain in the determination
       of net loss for the amount in excess of its carrying value of a
       subsidiary's stock, which arose from the subsidiary selling unissued
       shares of its stock in a subsequent offering to an unrelated investor.
       Under U.S. GAAP, gains for which realization is not assured must be
       treated as equity transactions.

(VI)   Under Canadian GAAP, Allelix capitalized the fair value of the incomplete
       research and development projects acquired and has been amortizing the
       amount over three years. Under U.S. GAAP, in a business combination
       accounted for as a purchase, a portion of the purchase price, may be
       allocated to incomplete research and development projects. Unless the
       project in process has an alternative future use, the fair value is
       charged to expense as research and development costs.

(VII)  Under U.S. GAAP, the preferred shares issued during the year which allow
       the holder to convert the preferred shares to common shares at a discount
       to market value is considered a beneficial conversion feature. The value
       of this feature is amortized, using the effective yield method, over the
       period of the preferred shares earliest conversion date.

                                       18
<PAGE>

                          COMPARATIVE PER SHARE DATA

     The following table sets forth certain historical per share data of NPS and
Allelix and combined per share data on an unaudited pro forma basis after giving
effect to the Arrangement as a purchase, assuming that 0.3238 shares of NPS
Common Stock, are issued in exchange for each share of Allelix Common Stock (as
adjusted for the conversion of the Allelix Preferred Shares) in the Arrangement.
The historical per share data of NPS presented below are presented as of and for
the nine months ended September 30, 1999 and as of and for the year ended
December 31, 1998. The historical per share data of Allelix is presented as of
and for the nine months ended August 31, 1999, and as of the year ended November
30, 1998. The pro forma per share data presented below combine NPS's per share
data as of and for the nine months ended September 30, 1999 and as of and for
the year ended December 31, 1998 with Allelix's per share data for the nine
months ended August 31, 1999 and as of and for the year ended November 30, 1998.
These data should be read in conjunction with the selected historical financial
information, the Unaudited Pro Forma Condensed Consolidated Financial Statements
and the separate historical financial statements of NPS and Allelix and the
notes thereto incorporated herein or included elsewhere in this Proxy Statement.
The Unaudited Pro Forma Condensed Consolidated Financial Statements are not
necessarily indicative of the operating results or financial position that would
have been achieved had the Arrangement been consummated at the beginning of the
period presented and should not be construed as representative of future
operations.

<TABLE>
<CAPTION>
                                                                                           As of and for the nine
                                                                  For the year ended            months ended
                                                                 December 31, 1998 for       September 30, 1999
                                                                   NPS; and November         for NPS; and August
                                                                 30, 1998 for Allelix        31, 1999 for Allelix
                                                                 --------------------      ----------------------
                                                                                (U.S. GAAP, U.S.$)
                                                                 ------------------------------------------------
          <S>                                                    <C>                       <C>
          HISTORICAL - NPS:
            Basic and diluted net loss per common share......... $              (1.39)     $                (1.22)
            Book value per common share (1)..................... $               3.59      $                 2.37
          HISTORICAL - Allelix:
            Basic and diluted net loss per common share......... $              (1.46)     $                (1.02)
            Book value per common share (1).....................                  N/A      $                 1.28
          PRO FORMA CONSOLIDATED PER NPS SHARE:
            Basic and diluted net loss per common share (2)..... $              (1.99)     $                (1.55)
            Book value per common share (1).....................                  N/A      $                 2.94
          ALLELIX EQUIVALENT PRO FORMA PER SHARE: (3)
            Basic and diluted net loss per common share (2)..... $              (0.64)     $                (0.50)
            Book value per common share (1).....................                  N/A      $                 0.95
</TABLE>

  (1)  The historical book value per common share is computed by dividing
       total stockholders' equity by the number of shares of common stock
       outstanding at the end of the period. The pro forma book value per
       share is computed by dividing pro forma stockholders' equity by the
       pro forma number of shares of common stock outstanding at the end of
       the period.

  (2)  Excludes a charge for in-process technology estimated to be
       approximately $19.46 million which will be charged to combined
       operations during the period in which the Arrangement is consummated.

  (3)  The Allelix Per Share Equivalents are calculated by multiplying the
       NPS consolidated pro forma per share amounts by the Exchange Ratio.

                                       19
<PAGE>

MARKETS AND MARKET PRICES AND DIVIDEND POLICY

     NPS Common Stock is listed on the Nasdaq Stock Market under the symbol
"NPSP." On September 27, 1999, the last trading day before the announcement by
NPS and Allelix that they had entered into the Arrangement Agreement, the
closing sale price of NPS Common Stock as reported on the Nasdaq Stock Market
was $7.00 per share. On November 11, 1999, the closing sale price of NPS Common
Stock as reported on the Nasdaq Stock Market was $3.875. There can be no
assurance as to the actual price of NPS Common Stock prior to, at or at any time
following the Effective Time.

     Allelix Common Stock is traded on the TSE under the symbol "AXB." On
September 27, 1999, the last trading day before the announcement by NPS and
Allelix that they had entered into the Arrangement Agreement, the closing sale
price of Allelix Common Stock as reported by the TSE was Cdn.$3.65 per share.
Following the Arrangement, Allelix Common Stock will cease to be traded on the
TSE. On November 11, 1999, the closing sale price of Allelix Common Stock as
reported by the TSE was Cdn.$1.85.

     The table below shows the high and low sale prices of NPS on the Nasdaq
Stock Market for the periods indicated.

                                                         NPS
                                                         ---
       1997                                        HIGH       LOW
                                                  -------    ------
          First Quarter......................     $12.250    $9.500
          Second Quarter.....................     $11.000    $8.250
          Third Quarter......................     $10.750    $8.125
          Fourth Quarter.....................     $10.063    $7.500

       1998
          First Quarter......................     $ 8.500    $7.375
          Second Quarter.....................     $ 8.250    $6.750
          Third Quarter......................     $ 9.313    $6.375
          Fourth Quarter.....................     $ 7.938    $5.500

       1999
          First Quarter......................     $ 7.500    $6.563
          Second Quarter.....................     $ 8.625    $5.875
          Third Quarter......................     $ 8.000    $5.500

     On November 9, 1999, there were 1,482 beneficial holders of NPS Common
Stock.

     NPS has never declared or paid cash dividends on capital stock. NPS intends
to retain any future earnings to finance growth and development and therefore
does not anticipate paying cash dividends in the foreseeable future.

                                       20
<PAGE>

     The table below shows the high and low sale prices of Allelix Common Stock
as reported in Canadian dollars on the TSE and the ME for the periods indicated.

                                                TSE                  ME
                                                ---                  --
                                           HIGH      LOW       HIGH       LOW
                                          ------    ------    -------    ------

        1997
          First Quarter................   $18.50    $11.05    $18.50     $11.50
          Second Quarter...............    12.40      9.00     12.10       9.80
          Third Quarter................    16.00      9.75     15.50      10.20
          Fourth Quarter...............    15.25     10.35     14.50      10.35

        1998
          First Quarter................   $12.50    $ 8.00    $12.00     $ 8.10
          Second Quarter...............     9.75      8.00      9.70       8.15
          Third Quarter................     8.20      3.10      8.40       3.15
          Fourth Quarter...............     6.35      2.50      5.95       3.03

        1999
          First Quarter................   $ 4.95    $ 3.01    $ 4.70     $ 3.05
          Second Quarter...............     3.50      2.26      3.40       2.26
          Third Quarter................     3.75      2.00      3.60       2.01


                                 RISK FACTORS

     Presented below are statements of the types of risks and uncertainties
faced by the Company and which are thereby borne by the Company's stockholders.
Other risks and uncertainties are described elsewhere herein or in other
Commission filed documents or are evident from the descriptions herein. There
can be no assurances that the Company or its management will succeed in efforts
to avoid or minimize these risks or uncertainties, or to optimize the potential
return associated with bearing these risks and uncertainties.

Risk Related to the Arrangement

     The Arrangement and an investment in securities of NPS involve certain
risks and uncertainties, including risks related to the integration of NPS and
Allelix, risks associated with the fixed Exchange Ratio, risks relating to the
respective businesses of NPS and Allelix and other risks and uncertainties
discussed therein and elsewhere in this Proxy Statement and in the documents
incorporated by reference.

     Uncertainty Relating to Integration. The Arrangement involves the
integration of two companies that have previously operated independently. Such
integration will require significant effort from each company including the
coordination of their efforts in research and development, business development,
intellectual property, finance, and administration efforts. There can be no
assurance that NPS will integrate the respective operations of NPS and Allelix
without encountering difficulties or experiencing loss of personnel, or that the
benefits expected from such integration will be realized. The diversion of the
attention of management and any difficulties encountered in the transition
process (including the interruption of, or a loss of momentum in, Allelix's or
NPS's activities and problems associated with employee uncertainty and the
potential loss of key personnel) could have an adverse impact on NPS's ability
to realize anticipated benefits from the Arrangement.

     Risks Associated with Fixed Exchange Ratio. As a result of the Arrangement,
each outstanding share of Allelix Common Stock will be converted into either
0.3238 of an NPS Common Share or 0.3238 of an Exchangeable Share. Because the
Exchange Ratio is fixed and will not increase or decrease due to fluctuations in
the market price of either NPS or Allelix Common Stock, the specific value of
the consideration to be received by Allelix shareholders in the Arrangement will
depend on the market price of NPS Common Stock at the Effective Time. In the
event that the market price of NPS Common Stock increases or decreases prior to
the Effective Time, the market value at the Effective Time of NPS Common Stock
to be received by Allelix shareholders in the Arrangement would correspondingly
increase or decrease. The market prices of NPS Common Stock and Allelix Common
Stock as of a recent date are set forth herein under "Summary-Markets and Market
Prices and Dividend

                                       21
<PAGE>

Policy." NPS Common Stock and Allelix Common Stock historically have been
subject to price volatility. No assurance can be given as to the market prices
of NPS Common Stock or Allelix Common Stock at any time.

     Effect of the Arrangement on Corporate Partners and Existing Agreements.
Certain of Allelix's and NPS's existing corporate partners may view the
Arrangement as disadvantageous to them. As a consequence, the combined company's
relationship with these strategic partners could be adversely affected. In
addition, the Arrangement will provide certain corporate partners with the right
to terminate their research and development agreements with Allelix under
certain circumstances. There can be no assurance that these agreements will not
be terminated. The termination of such agreements could have a material adverse
effect on Allelix's business and operations. The Arrangement will require the
consent of certain parties who have entered into contracts with Allelix. There
can be no assurance that such consents will be given and, if not given, that
such contracts will not terminate.

     The market price of NPS Common Stock may decline as a result of the
Arrangement. The Arrangement was publicly announced on September 28, 1999. From
September 27, 1999 to November 10, 1999, the closing price for NPS Common Stock
has declined from $7.00 per share to $4.00 per share, a 43% decline. The market
price of NPS Common Stock may continue to decline significantly if, among other
things:

     .    securities analysts fail to write reports which describe the
          Arrangement favorably and/or if securities analysts write about the
          Arrangement, but fail to recommend the stock;

     .    the integration of NPS's and Allelix's operations is not successful;

     .    the combined company does not experience business synergies as quickly
          or to the extent as may be expected by financial analysts;

     .    the accretive/dilution effect of the Arrangement is not in line with
          the expectation of financial analysts; or

     .    NPS determines that it will do an additional equity financing on terms
          or at a time which the marketplace concludes is unattractive or
          dilutive.

     In any such case, the trading price of NPS Common Stock may decline and you
may lose all or part of your investment.

     The Arrangement will result in integration costs and transaction expenses
that could adversely affect combined financial results. If the benefits of the
Arrangement do not exceed the costs associated with it, including the dilution
to NPS's stockholders resulting from the issuance of shares of NPS Common stock
in connection with the Arrangement, NPS's financial results, including earnings
per share, could be adversely affected. The combined company also expects to
incur costs after completion of the Arrangement associated with integrating the
operations of NPS and Allelix. Such costs may include:

     .    elimination of duplicate operations; and
     .    consolidation of certain administration, support, and research and
          development activities.

     Actual costs may substantially exceed preliminary estimates. In addition,
unanticipated expenses associated with integrating the two companies may arise.
NPS expects to incur a charge currently estimated to be $19.46 million in the
fourth quarter of 1999 to reflect NPS's write-off of Allelix's in-process
research and development efforts. These costs will not be accompanied by outward
cash flow, but may be seen by investors as increasing the net loss of the
Company. NPS may also incur additional charges in subsequent quarters to reflect
costs associated with the Arrangement.

     If the combined company is not permitted to write-off a significant amount
of the purchase price as attributable to in-process research and development,
estimates of future period results and actual future period results could be
burdened with additional costs, and the price of NPS's Common Stock could
decline. If current accounting rules as interpreted by NPS's auditors and the
SEC do not permit the combined company to immediately write off a

                                       22
<PAGE>

significant amount of the purchase price of the Arrangement as attributable to
in-process research and development, the combined company would have to amortize
a correspondingly higher amount of the purchase price over several years. Such
amortization would be reflected as an expense item on the combined company's
statement of operations, and cause it to report higher losses, which may
adversely affect its stock price.

     NPS may experience delay or ineffectiveness in efforts to manage its burn
rate and the attendant requirement to reduce costs, delay expenditures (for
example in clinical development), or raise additional equity financing incident
to the Arrangement. NPS has announced its intention to devote considerable cash
resources to late-stage clinical development, including for example, a Phase III
trial for ALX 1-11 for osteoporosis. If the Company's cost estimates are
exceeded or incurred earlier than planned, the Company may be required further
to realize costs (for example, by reducing head count), to delay developments or
to seek additional financing. Failure to manage the mix of this cash expenditure
and clinical progress may cause the price of NPS Common Stock to decline.

     NPS may be assessed certain federal income taxes as a result of the
Arrangement. The company believes that there should be no federal income tax
consequences to the Company as a result of the Arrangement. The Company's
conclusion is based upon the federal income tax laws currently in effect, which
are subject to change and, in some cases, not binding on the Internal Revenue
Service (the "Service") or the court. No advance income tax rulings have been
sought from the Internal Revenue Service as to the anticipated federal income
tax consequences of the transactions described herein. If the Service were to
successfully challenge the Company's conclusions, then the Company will be
required to recognize income as a result of the transactions contemplated
herein. See discussion under the "Certain Federal Income Tax Consideration."

     The Company has described other risks in its Annual Report on Form 10-K/A
and in other documents filed with the SEC. Stockholders are advised and
encouraged to read such other documents.

                            THE NPS SPECIAL MEETING

Purpose

     The enclosed proxy is solicited on behalf of the Board of Directors of NPS,
for use at the Special Meeting to be held on December 15, 1999, at 10:00 a.m.
local time and at any adjournment thereof (the "NPS Special Meeting"), for the
purposes set forth herein and in the accompanying Notice of Special Meeting. The
NPS Special Meeting will be held at the Company's headquarters located at 420
Chipeta Way, Salt Lake City, Utah.

Solicitation of Proxies

     The Company will bear the entire cost of solicitation of proxies including
preparation, assembly, printing, and mailing of this Proxy Statement, the proxy
card, and any additional information furnished to stockholders. Copies of
solicitation materials will be furnished to banks, brokerage houses,
fiduciaries, and custodians holding in their names shares of NPS Common Stock,
beneficially owned by others to forward to such beneficial owners. The Company
may reimburse persons representing beneficial owners of NPS Common Stock for
their costs of forwarding solicitation materials to such beneficial owners.
Original solicitation of proxies by mail may be supplemented by telephone,
telegram, or personal solicitation by directors, officers, or other regular
employees of the Company. No additional compensation will be paid to directors,
officers, or other regular employees for such services.

     The Company intends to mail this Proxy Statement and accompanying proxy
card on or about the date shown above to all stockholders entitled to vote at
the NPS Special Meeting.

Record Date, Entitlement to Vote, and Outstanding Shares

     November 11, 1999 is the record date for determining those holders of NPS
Common Stock entitled to notice of and to vote at the NPS Special Meeting. On
the record date, the Company had outstanding and entitled to vote 12,969,357
shares of common stock. Stockholders will be entitled to one vote for each share
held on all matters to be voted upon at the NPS Special Meeting. Except for the
stockholders identified herein under "NPS Principal

                                       23
<PAGE>

Stockholders," as of the Record Date, no other person beneficially owned more
than 5% of the outstanding NPS Common Stock.

Revocation of Proxies

     Any stockholder giving a proxy pursuant to this solicitation has the power
to revoke it at any time before it is voted. It may be revoked by filing with
the Secretary of the Company, at the Company's principal executive office, 420
Chipeta Way, Salt Lake City, Utah 84108-1256, a written notice of revocation or
a duly executed proxy bearing a later date, or it may be revoked by attending
the NPS Special Meeting and voting in person. Attendance at the NPS Special
Meeting will not, by itself, revoke a proxy.

Required Votes to Approve

     All votes will be tabulated by the Inspector of Elections appointed for the
NPS Special Meeting, who will separately tabulate affirmative and negative
votes, abstentions, and broker non-votes. Abstentions will be counted toward the
tabulation of votes cast on proposals presented to the stockholders, and will
have the same effect as negative votes. Broker non-votes are counted toward a
quorum, but are not counted for any purpose in determining whether a matter has
been approved.

     The presence, in person or by properly executed proxy, of the holders of a
majority of the outstanding shares of NPS Common Stock entitled to vote at the
NPS Special Meeting is necessary to constitute a quorum. Abstentions and broker
non-votes will be counted for purposes of determining a quorum.

     Approval of the issuance of NPS Common Shares in connection with the
Arrangement requires the approval of a majority of the shares present in person
or represented by proxy and entitled to vote at the NPS Special Meeting.
Approval of the Amendment to the Certificate of Incorporation requires the
approval of a majority of the outstanding shares of NPS Common Stock entitled to
vote as of the Record Date.

                          THE ALLELIX SPECIAL MEETING

     The Board of Directors for Allelix will call a special meeting of the
Allelix stockholders for the principal purpose of obtaining stockholder approval
of the Continuance and the Arrangement. The Allelix Special Meeting will occur
shortly after the NPS Special Meeting. In order for the Continuance and the
Arrangement to be approved, 66 2/3% of the Allelix stockholders present in
person or by proxy at the Allelix Special Meeting must vote in favor of each of
the Continuance and the Arrangement. If the Continuance is not approved, then
the Arrangement will not become effective. A more detailed description of this
meeting is contained in the Management Proxy Circular of Allelix attached hereto
as Appendix E and incorporated herein.

         PROPOSAL ONE -- APPROVAL OF THE SHARE ISSUANCES IN CONNECTION
                             WITH THE ARRANGEMENT

     The following discussion summarizes the proposed Arrangement and related
transactions. The following is not, however, a complete statement of all
provisions of the Arrangement Agreement and related agreements. Detailed terms
of all conditions to the Arrangement and related transactions are contained in
the Arrangement Agreement, a copy of which is attached to this Proxy Statement
as Appendix A. Statements made in this Proxy Statement with respect to the terms
and conditions of the Arrangement and such related transactions are qualified in
their respective entireties by reference to, and you are urged to read carefully
the more detailed information set forth in the Arrangement Agreement and the
other documents attached hereto.

Background of the Arrangement

     In March 1999, NPS engaged Prudential Securities to assist NPS in the
evaluation of strategic acquisitions directed at enhancing stockholder value.
Strategic acquisitions considered by Prudential Securities and NPS included the
acquisition by NPS of other small biotechnology and/or pharmaceutical companies
that could leverage NPS's existing clinical development programs and drug
discovery capabilities.

                                       24
<PAGE>

     During the period since signing the financial advisor agreement with
Prudential Securities and September 27, 1999, NPS reviewed a number of
acquisition/merger proposals. Confidentiality agreements were entered into and
due diligence performed with respect to numerous candidates. A non-binding
proposal was made to one small biotechnology company. This proposal was
rejected.

     In early August, a significant shareholder in NPS asked Dr. Hunter Jackson,
NPS's Chairman, President, and Chief Executive Officer, if the shareholder could
assist NPS by placing a call to Allelix management to suggest that NPS might be
interested in pursuing a merger with Allelix. Dr. Jackson responded that he
would welcome the assistance of such a call. Shortly thereafter, Mr. Graham
Strachan, then CEO and President of Allelix, called Dr. Jackson. Mr. Strachan
said he would be pleased to meet with Dr. Jackson. During mid-August,
discussions between representatives of Allelix and NPS and their respective
financial advisors commenced. On August 10, 1999, Allelix entered into a
confidential disclosure agreement with NPS to permit mutual due diligence
investigations to begin between Allelix and NPS. On August 31, 1999, an
exclusivity agreement was entered into between Allelix and NPS, committing
Allelix to a period of exclusive negotiations with NPS, subject to a customary
"fiduciary out," which would terminate on September 13, 1999, unless due
diligence investigations and/or negotiations were continuing at that date, in
which event such period of exclusivity of negotiations would be extended until
September 30, 1999.

     On September 13, 1999, NPS sent a letter to Allelix outlining the proposed
financial and other terms of a merger. On September 14, 1999, representatives of
Allelix, together with its legal advisors, Stikeman, Elliott, met with
representatives of NPS and its legal advisors, Blake, Cassels & Graydon, to
discuss and further advance negotiations of the definitive terms and structure
of a proposed merger transaction.

     On September 15, 1999, the NPS Board of Directors met to discuss the
Allelix transaction. A detailed presentation was made of the proposed
transaction with Allelix and the impact on the combined companies. That
presentation also addressed the necessity of downsizing the entities in order to
preserve cash and reallocate resources to those programs which have the
opportunity to provide a nearer term product to the combined entity. Duties of
the directors in connection with a merger were discussed with legal counsel.

     During a meeting of the Board of Directors of Allelix on September 21,
1999, members of NPS's senior management team attended and made a presentation
to Allelix's Board of Directors and Allelix's financial advisors concerning the
benefits available to Allelix through a merger with NPS and NPS's vision for the
merged company, and to otherwise familiarize the Board of Directors of Allelix
with NPS's research and development programs and business. During this period
and until September 27, 1999, the terms of a definitive arrangement agreement
between NPS and Allelix were negotiated.

     On Friday, September 24, 1999, an information meeting for the NPS Board of
Directors was convened. At this meeting, a discussion of the transaction was
presented and the Board of Directors had opportunity to ask questions and assess
management's due diligence process. By overnight mail September 23, 1999, Hunter
Jackson sent to the NPS Board copies of the transaction documents and a formal
description of the transaction.

     On September 27, 1999, the NPS Board of Directors met to receive a
presentation from Prudential Securities concerning the proposed merger and to
receive the Prudential Securities Opinion described below under "Opinion of
NPS's Financial Advisor, Prudential Securities." At the same meeting, the Board
of Directors of NPS received a report from legal counsel on the terms of the
arrangement agreement that had been negotiated. The Board of Directors of NPS
authorized the entering into of the Arrangement Agreement described below under
"The Arrangement Agreement and Related Agreements," which agreement was executed
and delivered on the evening of September 27, 1999. The Board of Directors also
approved the plans for and terms of a reduction in force to be implemented on
September 28, 1999.

NPS's Reasons for the Arrangement and Recommendation of the NPS Board

     In reaching its determination and making its recommendation to NPS
Stockholders, the Board of Directors of NPS considered a number of factors,
including the following:

                                       25
<PAGE>

 .    the combined business which results from the Arrangement will have
     significantly greater financial, business and scientific resources which
     may enable the combined business to more effectively develop and exploit
     its portfolio of drug product candidates;

 .    the combination yields an increase in NPS's pipeline of drug development
     candidates thereby decreasing NPS's dependence on one or a few programs;

 .    the combination can utilize the complementary nature of Allelix's and NPS's
     respective portfolios of drug product candidates;

 .    the combination's focus on proprietary and late-stage clinical programs may
     increase the potential for sustainable revenues and earnings;

 .    the combined business may be able to take advantage of NPS's U.S.
     biomedical industry connections and NPS's presence on the Nasdaq Stock
     Market while continuing to benefit from the Canadian biotechnology industry
     and its associated technical and financial resources;

 .    the Prudential Securities Opinion dated September 27, 1999 that, from a
     financial point of view, the Exchange Ratio is fair to NPS;

 .    the combined company may be able to obtain a significantly increased market
     capitalization, potentially allowing greater access to financing
     opportunities;

 .    the combined company will have late stage product candidates appropriate
     for development and marketing by the Company directly; and

 .    the combined company will have a greater choice of late stage clinical
     programs over which to deploy limited resources and thereby will be better
     able to manage the inherent risks of the industry in general and the
     Company in particular.

     In reaching its determination, the Board of Directors of NPS also
considered and evaluated, among other things:

 .    information concerning the business, operations, financial condition and
     prospects of Allelix and NPS;

 .    current industry, economic, and market conditions and trends and its
     informed expectations of the future of the biotechnology and pharmaceutical
     products industries;

 .    historical market prices and trading information with respect to Allelix
     Common Shares and NPS Common Shares;

 .    the anticipated synergies, cost reductions, improved balance sheet, and
     other operational advantages and efficiencies as a result of the
     combination;

 .    the anticipated challenges associated with successfully integrating the
     businesses of Allelix and NPS;

 .    reports from management concerning due diligence conducted by NPS on the
     scientific programs of Allelix;

 .    reports from management and legal and financial advisors concerning the
     specific terms of the Arrangement Agreement and ancillary documents;

 .    the possibility that the Arrangement would not be consummated;

 .    the potential disruption to the business of both companies following
     announcement of the Arrangement, including the effects of employee
     uncertainty, the possibility that key corporate employees may leave, and
     the

                                       26
<PAGE>

     possibility that key corporate collaborators may not approve of the
     Arrangement or may determine to terminate their relationship with the
     combined company, if their agreements permit termination as a result of the
     Arrangement;

 .    the dilutive effects of the issuance of shares in the Arrangement and the
     higher level of expenses that will be borne by the combined company; and

 .    the possibility that the anticipated benefits of the Arrangement will not
     be realized.

     The NPS Board of Directors concluded that the benefits of the transaction
to NPS and its stockholders outweighed the risks associated with the foregoing
factors.

     The foregoing discussion of the information and factors considered and
given weight by the Board of Directors of NPS is not intended to be exhaustive.
In reaching the determination to approve and recommend the Arrangement, the
Board of Directors of NPS did not assign any relative or specific weights to the
foregoing factors which were considered, and individual directors may have given
different weights to different factors. The Board of Directors of NPS is,
however, unanimous in its recommendation to the NPS Stockholders that the
matters presented at the NPS Special Meeting be approved.

     The Board of Directors of NPS realizes that there are certain risks
associated with the Arrangement, including those set forth under "Risk Factors."
However, the Board of Directors of NPS believes that the positive factors should
outweigh those risks, although there cannot be assurances in this regard.

Opinion of NPS's Financial Advisor, Prudential Securities

     On September 27, 1999, Prudential Securities Incorporated ("Prudential
Securities") delivered its oral opinion to the NPS Board of Directors to the
effect that, as of such date, the Exchange Ratio was fair, from a financial
point of view, to NPS (the "Prudential Securities Opinion"). Prudential
Securities made a presentation of the financial analysis underlying its oral
opinion at a meeting of the NPS Board on September 27, 1999. This analysis, as
presented to the NPS Board of Directors, is summarized below. Prudential
Securities confirmed its oral opinion in writing on September 27, 1999.

     In requesting the Prudential Securities Opinion, the NPS Board did not give
any special instructions to Prudential Securities or impose any limitation upon
the scope of the investigation that Prudential Securities used to deliver the
Prudential Securities Opinion. A copy of the Prudential Securities Opinion,
which sets forth the assumptions made, matters considered and limits on the
review undertaken, is attached to this Proxy Statement as Appendix D and is
incorporated herein by reference. The summary of the Prudential Securities
Opinion set forth below is qualified in its entirety by reference to the full
text of the Prudential Securities Opinion. NPS Stockholders are urged to read
the Prudential Securities Opinion in its entirety.

     THE PRUDENTIAL SECURITIES OPINION IS FOR THE USE OF THE NPS BOARD, IS
DIRECTED ONLY TO THE FAIRNESS OF THE EXCHANGE RATIO TO THE COMPANY AS OF
SEPTEMBER 27, 1999, FROM A FINANCIAL POINT OF VIEW, AND DOES NOT CONSTITUTE A
RECOMMENDATION TO ANY STOCKHOLDER AS TO HOW SUCH STOCKHOLDER SHOULD VOTE IN
CONNECTION WITH THE ISSUANCE OF SHARES OF NPS COMMON STOCK PURSUANT TO THE
MERGER OR AS TO ANY OTHER ACTION SUCH STOCKHOLDER SHOULD TAKE REGARDING THE
MERGER.

     In conducting its analysis and arriving at the Prudential Securities
Opinion dated September 27, 1999, Prudential Securities reviewed such materials
and considered such financial data and other factors as Prudential Securities
deemed relevant under the circumstances, including, the following:

 .    a draft dated September 25, 1999 of the Arrangement Agreement;

 .    certain publicly-available historical financial and operating data for NPS
     including, but not limited to, (a) the Annual Report on Form 10-K for the
     fiscal year ended December 31, 1998, (b) the Quarterly Report on

                                       27
<PAGE>

     Form 10-Q for the quarter ended June 30, 1999, and (c) the Proxy Statement
     for the Annual Meeting of Stockholders held on May 26, 1999;

 .    certain information relating to NPS, including financial forecasts for the
     fiscal years December 31, 1999 through December 31, 2004, prepared by the
     management of NPS;

 .    certain publicly-available historical financial and operating data for
     Allelix including, but not limited to, the Annual Report for the fiscal
     year ended August 31, 1998, and unaudited financial statements for Allelix
     for the fiscal year ended August 31, 1999;

 .    certain information relating to Allelix, including the financial forecasts
     for the four months ended December 31, 1999 and the fiscal year ending
     December 31, 2000 through December 31, 2004, prepared by the management of
     Allelix;

 .    publicly-available financial, operating and stock market data concerning
     certain companies engaged in businesses Prudential Securities deemed
     comparable to Allelix or otherwise relevant to Prudential Securities'
     inquiry;

 .    the financial terms of certain recent transactions deemed relevant by
     Prudential Securities to its inquiry;

 .    the historical stock prices and trading volumes of NPS Common Stock and
     Allelix Common Shares;

 .    the Stock Purchase Agreement dated October 30, 1998 between Allelix and
     Johnson & Johnson Development Corporation; and

 .    such other financial studies, analyses and investigations that Prudential
     Securities deemed appropriate.

     Prudential Securities assumed, with NPS's consent, that (a) each holder of
Allelix Common Shares would receive 0.3238 shares of NPS Common Stock and (b)
the draft of the Arrangement Agreement which Prudential Securities reviewed (as
referred to above) conformed in all material respects to that document in final
form and that the Arrangement would be consummated on the terms described in the
Arrangement Agreement without any waiver of any material terms or conditions.

     Prudential Securities met with the senior management of NPS and Allelix to
discuss:

 .    the prospects for their respective businesses;

 .    their estimates of such businesses' future financial performance;

 .    the financial impact of the Arrangement on the respective companies; and

 .    such other matters as Prudential Securities deemed relevant.

     In connection with its review and analysis and in arriving at the
Prudential Securities Opinion, Prudential Securities relied upon the accuracy
and completeness of the financial and other information publicly available or
otherwise made available or provided to Prudential Securities concerning NPS and
Allelix, and did not undertake any independent verification of such information
or any independent valuation or appraisal of any of the assets or liabilities of
NPS or Allelix, and Prudential Securities was not provided with any independent
valuation or appraisal. With respect to the financial forecasts provided to
Prudential Securities by NPS for NPS, and by Allelix for Allelix, Prudential
Securities assumed that such information (including the assumptions and bases
therefor) represented each respective management's best currently available
estimate as to the future financial performance of NPS and Allelix and that NPS
and Allelix would perform in accordance with such projections. Prudential
Securities assumes no responsibility for and expresses no view as to such
forecasts or the assumptions under which they were prepared. Further, the
Prudential Securities Opinion is necessarily based on economic, financial and

                                       28
<PAGE>

market conditions as they existed on September 27, 1999 and can only be
evaluated as of that date, the date of the Prudential Securities Opinion.

     The Prudential Securities Opinion does not address nor should it be
construed to address the relative merits of the Arrangement or alternative
business strategies that may be available to NPS. In addition, the Prudential
Securities Opinion does not in any manner address the prices at which NPS Common
Stock or the Exchangeable Shares will trade following consummation of the
Arrangement.

     In addition, the Prudential Securities Opinion and the presentation to the
NPS Board, taken together, was one of the many factors taken into consideration
by the NPS Board in making its determination to recommend approval of the
Arrangement Agreement. Consequently, the analyses of Prudential Securities
described below should not be viewed as determinative of the opinion of the NPS
Board with respect to the Exchange Ratio. The Exchange Ratio was determined
through arm's length negotiations between NPS and Allelix and was approved by
the NPS Board.

     In arriving at the Prudential Securities Opinion, Prudential Securities
performed a variety of financial analyses, including those summarized herein.
The summary set forth below of the analyses presented to the NPS Board at the
September 27, 1999 meeting does not purport to be a complete description of the
analyses performed. The preparation of a fairness opinion is a complex process
that involves various determinations as to the most appropriate and relevant
methods of financial analyses and the application of these methods to the
particular circumstance. Therefore, this kind of opinion is not necessarily
susceptible to partial analysis or summary description. Prudential Securities
believes that its analyses must be considered as a whole and that selecting
portions of its opinion or portions of the factors considered by it, without
considering all analyses and factors, could create an incomplete view of the
evaluation process underlying the Prudential Securities Opinion. Prudential
Securities made numerous assumptions with respect to industry performance,
general business, economic, market and financial conditions and other matters,
many of which are beyond the control of NPS and Allelix. Any estimates contained
in Prudential Securities' analyses are not necessarily indicative of actual
values or future results, which may be significantly more or less favorable than
suggested by such analyses. Additionally, estimates of the values of businesses
and securities do not purport to be appraisals or necessarily reflect the prices
at which businesses or securities may be sold. Accordingly, such analyses and
estimates are inherently subject to substantial uncertainty. Subject to the
foregoing, the following is a summary of the material financial analyses
presented by Prudential Securities to the NPS Board in connection with the
Prudential Securities Opinion dated September 27, 1999.

Comparable Companies Analysis

     A comparable companies analysis was employed by Prudential Securities to
establish implied ranges for the Exchange Ratio. Prudential Securities analyzed
publicly available historical and projected financial results, including
multiples of current enterprise value (defined as equity value plus total debt
minus cash) to total assets and last twelve months ("LTM") revenue, and current
equity value (defined as the closing stock price on September 24, 1999 (the
"September 24/th/ Closing Stock Price") times diluted shares outstanding) to
book value and tangible book value, of certain companies considered by
Prudential Securities to be reasonably similar to NPS and Allelix. The companies
analyzed included: Algos Pharmaceutical Corporation, Bone Care International,
Inc., Cephalon, Inc., GelTex Pharmaceuticals, Inc., Guilford Pharmaceuticals,
Inc., Neose Technologies, Inc., NeoTherapeutics, Inc., Neurocrine Biosciences,
Inc., Neurogen Corporation, Regeneron Pharmaceuticals, Inc., and Synaptic
Pharmaceutical Corporation (the "Prudential Securities Allelix Comparable
Companies"). All of the trading multiples of the Prudential Securities Allelix
Comparable Companies were based on the September 24/th/ Closing Stock Price.

     Based on the September 24/th/ Closing Stock Price, the Prudential
Securities Allelix Comparable Companies were found to have current enterprise
values within a range of 1.2x to 4.8x total assets and 3.0x to 16.1x LTM
revenue, and current equity values within a range of 1.6x to 3.7x book value and
1.6x to 4.0x tangible book value. Applying such multiples to Allelix's total
assets, LTM revenue, book value and tangible book value, each for the fiscal
year ended August 31, 1999, resulted in implied ranges for the exchange ratio of
0.1913 to 0.9778, 0.1345 to 1.0280, 0.2835 to 0.6664 and 0.1788 to 0.4509,
respectively.

                                       29
<PAGE>

Comparable Transactions Analysis

     Prudential Securities also analyzed the consideration paid in several
recent merger and acquisition transactions deemed by Prudential Securities to be
reasonably similar to the Arrangement, and considered: (1) the multiple of the
acquired entity's equity value (defined as the purchase price of the acquired
entity's equity) to the acquired entity's book value and tangible book value;
(2) the multiple of the acquired entity's enterprise value (defined as the
purchase price of the acquired entity's equity plus assumed debt minus cash) to
the acquired entity's total assets and LTM revenue; and (3) the applicable
premiums paid over the acquired entity's public stock trading prices one day,
one week, four weeks and twelve weeks before announcement of each transaction,
all based upon publicly available information for such transactions. The
transactions considered were the combinations of the following companies: (i)
SIBIA Neurosciences Inc. and Merck & Co., Inc. (pending as of September 27,
1999), (ii) Centocor, Inc. and Johnson & Johnson (pending as of September 27,
1999), (iii) ALZA Corporation and Abbott Laboratories (pending), (iv) SUGEN,
Inc. and Pharmacia & Upjohn, Inc., (v) NeXstar Pharmaceuticals, Inc. and Gilead
Sciences, Inc., (vi) Agouron Pharmaceuticals, Inc. and Warner-Lambert Company,
(vii) SEQUUS Pharmaceuticals, Inc. and ALZA Corporation, (viii) Virus Research
Institute, Inc. and T Cell Sciences, Inc., (ix) Neurex Corporation and Elan
Corporation plc, (x) Somatogen, Inc. and Baxter International Inc., (xi) Sequana
Therapeutics, Inc. and Arris Pharmaceutical Corp., and (xii) Athena
Neurosciences, Inc. and Elan Corporation plc (the "Prudential Securities
Comparable Transactions").

     The Prudential Securities Comparable Transactions were found to imply for
the acquired entity an enterprise value within a range of 1.8x to 8.9x total
assets and 3.3x to 13.8x LTM revenue, and an equity value within a range of 3.4x
to 12.2x book value and 3.4x to 17.7x tangible book value. Applying such
multiples to Allelix resulted in implied ranges for the Exchange Ratio of 0.3238
to 1.8927 for total assets, 0.1533 to 0.8710 for LTM revenue, 0.6005 to 2.1761
for book value, and 0.3787 to 1.9818 for tangible book value.

     The Prudential Securities Comparable Transactions were found to imply for
the acquired entity a premium within a range of 12.3% to 61.9%, 16.8% to 105.4%,
14.4% to 92.0% and 30.1% to 107.1% for the one day, one week, four week and
twelve week periods, respectively. The corresponding premiums for the
Arrangement, using the Exchange Ratio, are 0.8%, 13.3%, 62.2% and 48.2%,
respectively.

     None of the companies or acquired entities utilized in the above Prudential
Securities Allelix Comparable Companies analysis and Prudential Securities
Comparable Transactions analysis for comparative purposes is, of course,
identical to Allelix or the Arrangement. Accordingly, a complete analysis of the
results of the foregoing calculations cannot be limited to a quantitative review
of such results and involves complex considerations and judgments concerning
differences in financial and operating characteristics of the Prudential
Securities Allelix Comparable Companies and the acquired entities in the
Prudential Securities Comparable Transactions, and other factors that could
affect the public trading value and consideration paid for each of the
Prudential Securities Allelix Comparable Companies and the Prudential Securities
Comparable Transactions, respectively, as well as that of Allelix.

Contribution Analysis

     Prudential Securities examined NPS's and Allelix's relative contributions
to the LTM (as of June 30, 1999 for NPS and August 31, 1999 for Allelix) and
projected calendar 1999, 2000, 2001 and 2002 revenue, earnings before interest,
taxes, depreciation and amortization (for purposes of this section titled
"Opinion of NPS's Financial Advisor" only, "EBITDA"), and net income to the
combined entity (the "Combined Company"), and compared these results to the
percentage of post-merger NPS common stock that the respective current NPS
Stockholders and Allelix stockholders would hold. In performing such analysis,
Prudential Securities relied upon projected stand-alone financial data provided
by NPS management for NPS and Allelix management, as adjusted by NPS management,
for Allelix. The projections in the Contribution Analysis were calculated based
on pure contribution on a stand-alone basis and did not include synergies or
transaction costs related to the Arrangement. Prudential Securities observed
that for the last twelve months (as of June 30, 1999 for NPS and August 31, 1999
for Allelix), and projected calendar 1999, 2000, 2001 and 2002, Allelix would
contribute 73.9%, 69.7%, 47.4%, 33.4% and 51.2% to the Combined Company's pro
forma revenues, respectively, and 40.5%, 39.1%, 49.6% 71.5% and 136.4%

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<PAGE>

to the Combined Company's pro forma EBITDA. An analysis of net income is not
meaningful because either NPS, Allelix, or both companies are projected to have
negative net income for these periods.

     Prudential Securities also examined NPS's and Allelix's relative
contributions of cash and cash equivalents, tangible book value, and total
assets as of June 30, 1999 for NPS and August 31, 1999 for Allelix. NPS
contributed to the Combined Company 68.1% of the pro forma cash and equivalents,
67.2% of the pro forma tangible book value, and 52.6% of the pro forma total
assets, while Allelix contributed to the Combined Company 31.9% of the pro forma
cash and equivalents, 32.8% of the pro forma tangible book value, and 47.4% of
the pro forma total assets. Based on the September 24/th/ Closing Stock Price
and the Exchange Ratio of 0.3238, NPS and Allelix were estimated to hold 65.9%
and 34.1%, respectively, of the Combined Company's implied equity value and
62.0% and 38.0%, respectively, of the Combined Company's enterprise value.

Dilution/Accretion Analysis

     Prudential Securities also analyzed the pro forma effect of the Arrangement
on NPS's projected earnings per share. An analysis of the anticipated future
results of NPS and Allelix based on estimates provided by NPS management for NPS
and Allelix management, as adjusted by NPS management, for Allelix,
respectively, indicated that the Arrangement results in a dilution of NPS's
earnings per share for 1999 and 2000 with an accretive effect on NPS's earnings
per share for 2001, 2002, 2003 and 2004.

     Projected financial and other information concerning NPS and Allelix and
the impact of the Arrangement upon the holders of NPS Common Stock are not
necessarily indicative of future results. All projected financial information is
subject to numerous contingencies, many of which are beyond the control of
management of NPS and Allelix.

     NPS selected Prudential Securities to provide a fairness opinion because it
is a nationally recognized investment banking firm engaged in the valuation of
businesses and their securities in connection with mergers and acquisitions and
for other purposes and has substantial experience in transactions similar to the
Arrangement. Pursuant to an engagement letter with Prudential Securities dated
March 16, 1999, Prudential Securities will receive a fee payable upon completion
of the Arrangement equal to 2.5% of the aggregate consideration (as defined in
the Engagement Letter) to be received by NPS, NPS Stockholders or employees,
subject to a maximum fee of $1,250,000. NPS has agreed to reimburse all
reasonable out-of-pocket expenses, including fees and disbursements of counsel.
NPS also has agreed, under separate agreement, to indemnify Prudential
Securities, its affiliates and its employees against certain liabilities,
including liabilities under federal securities laws.

     In the past, Vector Securities International, Inc., now a unit of
Prudential Securities, has provided financial advisory and financing services
for NPS. In the ordinary course of business, Prudential Securities may actively
trade the shares of NPS Common Stock for its own account and for the accounts of
customers, and accordingly, may at any time hold a long or short position in
such securities.

Interests of Certain Persons in the Arrangement

     The Arrangement Agreement provides that all rights to indemnification
existing in favor of the persons serving as directors and officers of Allelix as
of the date of the Arrangement Agreement for acts or omissions occurring prior
to the Effective Time, as provided in the bylaws of Allelix will survive the
Arrangement. Subject to certain limitations, NPS has also agreed to maintain in
effect for seven years after the Effective Time a policy of directors' and
officers' liability insurance on substantially the same terms as to coverage and
deductibles and other terms as Allelix had in place prior to the Arrangement,
for the benefit of persons serving as directors and officers of Allelix as of
such date.

Mechanics

     At the Effective Time, NPS Allelix Inc., an indirect wholly-owned
subsidiary of NPS, will acquire the outstanding shares of common stock of
Allelix including the outstanding shares of Preferred Stock of Allelix, which by
contract will have converted to shares of Allelix common stock (the "Allelix
Common Shares"). As a result,

                                       31
<PAGE>

Allelix will effectively become an indirect wholly-owned subsidiary of NPS. Each
holder of Allelix Common Shares who does not elect dissenters' rights under
Canadian law, will receive either NPS Common Stock or shares of NPS Allelix
Exchangeable Shares. Each holder who is a Canadian resident, will receive, at
his or her or its option, 0.3238 Exchangeable Shares or 0.3238 NPS Common Shares
for each Allelix Common Share held by such holder. Each holder who is not a
Canadian resident, will receive 0.3238 NPS Common Shares for each Allelix Common
Share held.

     No certificates representing fractional shares will be delivered in
exchange for Allelix Common Shares pursuant to the Arrangement. Each party
otherwise entitled to a fractional interest in an Exchangeable Share or to a
fractional interest in a NPS Common Share will receive a certificate evidencing
that number of shares to which such party is entitled rounded up to the next
highest whole number.

Description of Exchangeable Shares

     Retraction of Exchangeable Shares. Subject to the Retraction Call Right (as
defined in the Exchangeable Shares Provisions) of NPS Holdings, holders of
Exchangeable Shares will be entitled at any time following the Effective Time to
require NPS Allelix to redeem any or all of the Exchangeable Shares held by such
holder (the "Retraction Right") for an amount per share equal to the current
market price of an NPS Common Share on the date of retraction, which will be
satisfied in full by NPS by delivery to the holder of one share of NPS Common
Stock for each Exchangeable Share.

     Redemption of Exchangeable Shares. Subject to applicable law and provided
NPS Holdings has not exercised the Redemption Call right, NPS Allelix has the
right, on or after December 31, 2004, to redeem all, but not less than all, of
the then outstanding Exchangeable Shares for an amount per share equal to the
then current market price of a share of NPS Common Stock determined as of the
last business day prior to the Redemption Date, plus any declared and unpaid
dividend, if any, which shall be payable through delivery of one NPS Common
Share for each Exchangeable Share redeemed. NPS Allelix also has the right to
require an early redemption of the Exchangeable Shares prior to December 31,
2004. An early redemption may occur upon (i) there being fewer than 1,000,000
Exchangeable Shares outstanding; or (ii) on the occurrence of a NPS Control
Transaction provided that the NPS Allelix Board of Directors determines that it
is not reasonably practicable to substantially replicate the terms of
Exchangeable Shares in connection with the transaction. An NPS Control
Transaction is defined in the Exchangeable Shares Provisions as any merger,
amalgamation, tender offer, material sale of shares or rights or interests
therein, or similar transactions involving NPS, or any proposal to do so.

     Purchase for Cancellation. Subject to applicable law, NPS Allelix may at
any time and from time to time purchase for cancellation all or any part of the
outstanding Exchangeable Shares at any price by tender to all the holders of
record of Exchangeable Shares then outstanding or through the facilities of any
stock exchange on which the Exchangeable Shares are listed or quoted at any
price per share.

Voting, Dividend and Liquidation Rights of Holders of Exchangeable Shares

     Voting Rights with Respect to NPS Allelix. Except as required by law and by
Article 10 of the Exchangeable Share Provisions, the holders of Exchangeable
Shares are not entitled as such to receive notice of or attend any meeting of
shareholders of NPS Allelix or to vote at any such meeting.

     Voting Rights with Respect to NPS. On the Effective Date, NPS, NPS Allelix,
and a trust company mutually acceptable to NPS and Allelix (the "Trustee") will
enter into the Voting and Exchange Trust Agreement in substantially the form
attached hereto as Appendix F. Pursuant to the Voting and Exchange Trust
Agreement the terms of which are incorporated herein, NPS will issue the NPS
Special Voting Share to the Trustee for the benefit of the holders of
Exchangeable Shares. The NPS Special Voting Share will have the number of votes,
which may be cast at any meeting at which holders of NPS Common Shares are
entitled to vote, equal to the number of outstanding Exchangeable Shares held by
the registered holders from time to time of Exchangeable Shares.

     Each holder of Exchangeable Shares on the record date for any meeting at
which holders of NPS Common Shares are entitled to vote will be entitled to
instruct the Trustee to exercise one of the votes attached to the NPS

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<PAGE>

Special Voting Share for each Exchangeable Share held by such holder. The
Trustee will exercise (either by proxy or in person) each vote attached to the
NPS Special Voting Share only as directed by the relevant holder and, in the
absence of instructions from an Exchangeable Share holder as to voting, will not
exercise such votes. An Exchangeable Share holder may, upon instructing the
Trustee, obtain a proxy from the Trustee entitling the beneficiary to vote
directly at the relevant meeting the votes attached to the NPS Special Voting
Share to which the beneficiary is entitled.

     All rights of a holder of Exchangeable Shares to exercise votes attached to
the NPS Special Voting Share will cease upon the exchange by the holder of such
Exchangeable Shares for NPS Common Shares.

     Dividend Rights. Holders of Exchangeable Shares will be entitled to
receive, subject to applicable law, dividends:

 .    in the case of a cash dividend declared on the NPS Common Shares, in an
     amount in cash for each Exchangeable Share corresponding to the cash
     dividend declared on each NPS Common Share;

 .    in the case of a stock dividend declared on the NPS Common Shares to be
     paid in NPS Common Shares, in such number of Exchangeable Shares for each
     Exchangeable Share as is equal to the number of NPS Common Shares to be
     paid on each NPS Common Share; or

 .    in the case of a dividend declared on the NPS Common Shares in property
     other than cash or NPS Common Shares, in such type and amount of property
     as is the same as, or economically equivalent to (as determined by the
     Board of Directors of NPS Allelix in good faith and in its sole discretion)
     the type and amount of property declared as a dividend on each NPS Common
     Share. Cash dividends on the Exchangeable Shares are payable in U.S.
     dollars or the Canadian Dollar Equivalent thereof, at the option of NPS
     Allelix.

     The declaration date, record date and payment date for dividends on the
Exchangeable Shares will be the same as the relevant date for the corresponding
dividends on the NPS Common Shares.

     Liquidation Rights with Respect to NPS Allelix. In the event of the
liquidation, dissolution, or winding-up of NPS Allelix, each holder of
Exchangeable Shares will have preferential rights to receive from NPS Allelix
for each Exchangeable Share held by such holder an amount per share equal to the
Current Market Price of an NPS Common Share on the last business day prior to
the liquidation date to be satisfied in full by delivery to such holder of one
NPS Common Share. Upon the occurrence of such liquidation, dissolution, or
winding-up, NPS Holdings will have an overriding right to purchase all but not
less than all of the outstanding Exchangeable Shares (other than Exchangeable
Shares held by NPS and its affiliates) from the holders thereof on the effective
date of such liquidation, dissolution, or winding-up for the same amount.

     Liquidation Rights with Respect to NPS. In order for the holders of
Exchangeable Shares to participate on a pro rata basis with the holders of NPS
Common Shares in the event of a liquidation of NPS, each Exchangeable Share will
automatically be exchanged for an equivalent number of NPS Common Shares plus,
to the extent not paid by NPS Allelix on the designated payment date therefor,
the amount of all declared and unpaid dividends on each such Exchangeable Share.

     Withholding Rights. NPS, NPS Allelix, and the Trustee will be entitled to
deduct and withhold from any consideration otherwise payable to any holder of
Exchangeable Shares or NPS Common Shares such amounts as NPS, NPS Allelix, or
the Trustee is required or permitted to deduct and withhold with respect to such
payment under the Canadian or United States tax laws, or any provision of
provincial, state, local, or foreign tax law.

     Ranking. The Exchangeable Shares will be entitled to a preference over the
common shares in the capital of NPS Allelix and any other shares ranking junior
to the Exchangeable Shares with respect to the payment of dividends and the
distribution of assets in the event of a liquidation, dissolution, or winding-up
of NPS Allelix, whether voluntary or involuntary, or any other distribution of
the assets of NPS Allelix among its shareholders for the purpose of winding-up
its affairs.

                                       33
<PAGE>

     Certain Restrictions. NPS Allelix will not, without the approval of the
holders of Exchangeable Shares:

 .    pay any dividends on the Common Shares of NPS Allelix, or any other shares
     ranking junior to the Exchangeable Shares, other than stock dividends
     payable in Common Shares of NPS Allelix or any such other shares ranking
     junior to the Exchangeable Shares, as the case may be;

 .    redeem, purchase, or make any capital distribution in respect of Common
     Shares of NPS Allelix or any other shares ranking junior to the
     Exchangeable Shares;

 .    redeem or purchase any other shares of NPS Allelix ranking equally with the
     Exchangeable Shares with respect to the payment of dividends or on any
     liquidation distribution; or

 .    except pursuant to and in accordance with the terms of the Allelix Options,
     the Allelix Warrants and the Allelix Preferred Shares, issue any
     Exchangeable Shares or any other shares of NPS Allelix ranking equally
     with, or superior to, the Exchangeable Shares other than by way of stock
     dividends to the holders of such Exchangeable Shares.

     The above restrictions will not apply at any time when the dividends on the
outstanding Exchangeable Shares corresponding to dividends declared and paid on
the NPS Common Shares have been declared and paid in full.

     Amendment and Approval. The rights, privileges, restrictions, and
conditions attaching to the Exchangeable Shares may be added to, changed, or
removed only with the approval of the holders thereof. Any such approval or any
other approval or consent to be given by the holders of Exchangeable Shares on
any other matter will be deemed to have been sufficiently given if given in
accordance with applicable law subject to a minimum requirement that such
approval or consent be evidenced by a resolution passed by not less than two-
thirds of the votes cast on such resolution at a meeting of the holders of
Exchangeable Shares duly called and held at which holders of at least 10% of the
then outstanding Exchangeable Shares are present or represented by proxy.

Allelix Preferred Shares

     On November 8,1999, there were 1,000 Allelix Preferred Shares outstanding.
Pursuant to the share conditions attached to the Allelix Preferred Shares (the
"Preferred Share Conditions") the Allelix Preferred Shares automatically convert
into fully paid non-assessable Allelix Common Shares no later than April 30,
2000. The Preferred Shares Conditions provide that each Allelix Preferred Share
is convertible at the option of the holder into that number of Allelix Common
Shares equal to the number determined by dividing the stated value of each
Allelix Preferred Share (U.S.$2,000) by the conversion price (the "Conversion
Price") being equal to 80% of the arithmetic average of the closing price of the
Allelix Common Shares on the TSE for the 20 trading days on which the Allelix
Common Shares were traded immediately preceding the conversion date, subject to
a maximum Conversion Price of U.S.$9.00 and a minimum Conversion Price of
Cdn.$3.36. This minimum Conversion Price has been in effect during each trading
day between September 28, 1999, the date of first public announcement of the
Arrangement and November 11, 1999. Pursuant to the Plan of Arrangement, each
Allelix Preferred Share will be automatically exchanged on or before April 30,
2000 for that number of NPS Common Shares equal to the amount determined by
dividing the stated value of each Allelix Preferred Share (U.S.$2,000) by 80% of
the Current Market Price of the NPS Common Shares which in any event shall not
be more than U.S.$27.79 or less than U.S.$10.38. The Current Market Price
maximum and minimum amounts of $U.S.$27.79 and U.S.$10.38, respectively, were
determined by dividing the corresponding amounts currently provided for in the
Preferred Share Conditions (U.S.$9.00 and $3.36, respectively), by the Exchange
Ratio.

Options

     On November 8, 1999, there were Allelix Options outstanding which, when
vested, would be exercisable to acquire a total of 1,536,733 Allelix Common
Shares at prices between Cdn.$0.75 to Cdn.$22.45 with various expiration dates
to 2009 (assuming approval of the Option Resolution by the Allelix
securityholders as described in the Allelix Management Proxy Circular).

                                       34
<PAGE>

     Each holder of Allelix Options will be entitled, after the Effective Time
and in accordance with the terms of the Allelix Options, upon the exercise of
such options, to receive in lieu of the number of Allelix Common Shares to which
such holder was theretofore entitled to receive upon such exercise, that
aggregate number of Exchangeable Shares or NPS Common Shares, as applicable,
that such holder would have been entitled to receive under the Plan of
Arrangement if such holder had been the registered holder of that number of
Allelix Common Shares that such holder was theretofore entitled to receive if
all such holder's Allelix Options had been exercised immediately prior to the
Effective Time.

Warrants

     On August 31, 1999, there were Allelix Warrants outstanding which entitled
the holders thereof to exercise such warrants for a total of 829,108 Allelix
Common Shares at prices between Cdn.$7.50 and Cdn$10.12 with various expiration
dates to 2005.

     Each holder of Allelix Warrants will be entitled, after the Effective Time
and in accordance with the terms of the Allelix Warrants, upon the exercise of
such warrants, to receive in lieu of the number of Allelix Common Shares to
which such holder was theretofore entitled to receive upon such exercise, that
aggregate number of Exchangeable Shares or NPS Common Shares, as applicable,
that such holder would have been entitled to receive under the Plan of
Arrangement if such holder had been the registered holder of that number of
Allelix Common Shares that such holder was theretofore entitled to receive if
all such holder's Allelix Warrants had been exercised immediately prior to the
Effective Time.

Court Approval and Completion of the Continuance and the Arrangement

     The Arrangement (including the Continuance) requires approval by the
Superior Court of Justice (Ontario) (the "Ontario Court"). Prior to the mailing
of this Proxy Statement, Allelix obtained an interim order from the Ontario
Court providing for the calling and holding of the Allelix Special Meeting and
other procedural matters.

     Subsequent to the approval of the Continuance and the Arrangement by the
Allelix stockholders at the Allelix Special Meeting, the Ontario Court will be
requested to issue a final order approving the terms of the Continuance and the
Arrangement (the "Final Order"). The hearing in respect of the Final Order is
scheduled to take place on December 17, 1999 at 10:00 a.m. (Toronto time) in the
Ontario Court at 393 University Avenue, Toronto, Ontario. The Ontario Court will
consider, among other things, the fairness and reasonableness of the Continuance
and the Arrangement. The Ontario Court may approve the Continuance and the
Arrangement in any manner the Ontario Court may direct, subject to compliance
with such terms and conditions, if any, as the Ontario Court deems fit.

     Assuming the Final Order is granted and the other conditions to closing
contained in the Arrangement Agreement are satisfied or waived, the Arrangement
will be effective shortly thereafter.

     Subject to the foregoing, it is expected that the Effective Time will occur
as soon as practicable after the requisite Allelix stockholder approval has been
obtained.

Accounting Treatment

     The Arrangement will be accounted for by NPS under the purchase method of
accounting in accordance with generally accepted accounting principles. Under
the purchase method of accounting, the purchase price of Allelix Common Stock,
including direct costs of the Arrangement, will be allocated to the tangible and
identifiable intangible assets acquired and liabilities assumed based upon their
estimated fair value, with excess purchase price allocated to goodwill. NPS
expects the Arrangement to result in a substantial charge related to in-process
research and development. See "Selected Unaudited Pro Forma Condensed
Consolidated Financial Data."

                                       35
<PAGE>

Regulatory Matters

     NPS and Allelix do not believe that any governmental filings with the U.S.
Federal Trade Commission ("FTC") are required with respect to the Arrangement.
However, the FTC or the Antitrust Division could take such action under the
antitrust laws as it deems necessary or desirable in the public interest,
including seeking to enjoin consummation of the Arrangement or seeking to cause
divestiture of significant assets of NPS or Allelix or their subsidiaries. There
can be no assurance that a challenge to the Arrangement on antitrust grounds
will not be made, or, if such challenge is made, of what the result would be.
Consummation of the Arrangement is conditioned upon, among other things, the
absence of any temporary restraining order, preliminary or permanent injunction,
or other order issued by any federal or state court in the United States which
prevents the consummation of the Arrangement.

No NPS Appraisal Rights

     Holders of NPS Common Stock are not entitled to appraisal rights under the
DGCL because NPS is not a constituent corporation to the Arrangement under the
DGCL.

The Composition of the NPS Board of Directors

     The Board of Directors for NPS presently consists of eight members, all of
whom were elected by a vote of the NPS Stockholders at the NPS Annual Meeting of
Stockholders held May 26, 1999. Pursuant to the terms of the Arrangement
Agreement, NPS has agreed to appoint three current directors of Allelix to the
NPS Board, thereby increasing the size of the NPS Board to eleven members. The
three appointees will serve until their successors are duly elected and
qualified. It is anticipated that the three appointees will be Dr. John R.
Evans, who will serve as Co-Chairman to the NPS Board, Edward Rygiel, and Dr.
Calvin R. Stiller. For biographical information on these individuals, see
"Information Concerning Allelix - Directors and Officers" in this Proxy
Statement.

Stock Exchange Listing

Exchangeable Shares

     The Exchangeable Shares will be listed for trading on the TSE. NPS has no
current intention to list the Exchangeable Shares on any other stock exchange in
Canada or the United States.

NPS Common Shares

     The NPS Common Shares are traded on the Nasdaq Stock Market. An application
will be made, as required, by NPS to the Nasdaq Stock Market to list the NPS
Common Shares that are issued pursuant to the Arrangement and that are issuable
from time to time in exchange for the Exchangeable Shares.

Resale of Exchangeable Shares and NPS Common Shares Received in Connection with
the Arrangement

United States

     The Exchangeable Shares and the NPS Common Shares issued pursuant to the
Arrangement will not be registered under the Securities Exchange Act of 1933
("1933 Act"). Such shares will instead be issued in reliance upon the exemption
provided by Section 3(a)(10) of the 1933 Act. Section 3(a)(10) exempts
securities issued in exchange for one or more outstanding securities from the
general requirement of registration where the terms and conditions of the
issuance and exchange of such securities have been approved by any court, after
a hearing upon the fairness of the terms and conditions of the issuance and
exchange at which all persons to whom such securities will be issued have the
right to appear. The Ontario Court is authorized to conduct a hearing to
determine the fairness of the terms and conditions of the Arrangement, including
the proposed issuance of securities in exchange for other outstanding
securities. The Ontario Court entered the Interim Order on November 2, 1999, a
copy of which is attached hereto as Appendix G, and subject to the approval of
the Arrangement by the Allelix stockholders, a hearing on the fairness of the
Arrangement will be held on December 17, 1999, at 10:00 a.m.

                                       36
<PAGE>

(Toronto time) by the Ontario Court at which time it is anticipated the Final
Order will be entered by the Ontario Court.

     The Exchangeable Shares and NPS Common Shares received in exchange for
Allelix Common Shares in the Arrangement generally will be freely transferable
under United States federal securities laws. Accordingly, except for
"affiliates," (as such term is defined under the 1933 Act), stockholders of
Allelix will receive free-trading shares of NPS Common Stock.

     Except for Exchangeable Shares or NPS Common Shares held by persons who are
deemed to be affiliates of Allelix prior to the Arrangement. Exchangeable Shares
or NPS Common Shares held by such affiliates may be resold by them only in
transactions permitted by the resale provisions of Rule 145(d)(1), (2), or (3)
promulgated under the 1933 Act or as otherwise permitted under the 1933 Act.
Rule 145(d) provides a safe harbor for resales of securities received by certain
persons in transactions such as the Arrangement.

     Rule 145(d)(1) generally provides that affiliates of Allelix may sell
securities of NPS received in the Arrangement if such sale is effected pursuant
to the volume, current public information and manner of sale limitations of Rule
144 promulgated under the 1933 Act, including Regulation S thereunder. These
limitations generally require that any sales made by such an affiliate in any
three month period shall not exceed the greater of 1% of the outstanding shares
of the securities being sold or the average weekly trading volume over the four
calendar weeks preceding the placement of the sell order and that such sales be
made in unsolicited, open market "brokers transactions."

     Rules 145(d)(2) and (3) generally provide that the foregoing limitations
lapse for non-NPS affiliates after a period of one or two years, respectively,
depending upon whether certain currently available information continues to be
available with respect to NPS. Persons who may be deemed to be affiliates of an
issuer generally include individuals or entities that control, are controlled
by, or are under common control with, such issuer and may include certain
officers and directors of such issuer as well as principal shareholders of such
issuer.

     Under Rule 904 of Regulation S, persons who are not "affiliates" of NPS (or
who are NPS affiliates solely by virtue of holding a position as an officer or
director of NPS) may sell Exchangeable Shares if no "directed selling efforts"
(as defined in Rule 902 of Regulation S) are made by the seller or any of its
affiliates or any person on their behalf, no offer is made to a person in the
United States, and either (i) at the time the buy order is originated, the buyer
is outside the United States, or the seller and any person acting on behalf of
the seller reasonably believes the buyer is outside the United States, or (ii)
the transaction is executed in, on or through the facility of the TSE and
neither the seller nor any person acting on behalf of the seller knows that the
Arrangement has been pre-arranged with a buyer in the United States. In the case
of sales by a person who is an officer or director of NPS and is an affiliate of
NPS solely by virtue of holding that position, no selling concession, fee or
other remuneration may be paid in connection with the offer or sale other than
the usual and customary broker's commission that would be received by a person
executing the transaction as agent. Additional conditions apply to resales by
persons who are NPS affiliates other than by virtue of holding a position as an
officer or director of NPS.

     NPS has agreed that the issuance of NPS Common Shares from time to time in
exchange for the Exchangeable Shares will be registered under the 1933 Act prior
to the Effective Time and will be listed on the Nasdaq Stock Market.

Canada

     NPS will apply for rulings or orders of securities regulatory authorities
in Canada to permit the issuance of the Exchangeable Shares and the NPS Common
Shares that are issuable under the Arrangement, upon exchange of Exchangeable
Shares and upon exercise of the Allelix Options and/or the Allelix Warrants.
Application will also be made to permit resale of those shares in various
jurisdictions without restriction by Persons other than a "control person,"
provided that no unusual effort is made to prepare the market for any such
resale or to create a demand for the securities which are the subject of any
such resale and no extraordinary commission or consideration is paid in respect
thereof.

                                       37
<PAGE>

Ongoing Canadian Reporting Obligations

     Upon completion of the Arrangement, Allelix will be a subsidiary of NPS and
Allelix will continue to be a reporting issuer in all of the provinces of
Canada. NPS will file with the relevant securities regulatory authorities in
Canada copies of all documents required to be filed by it with the SEC under the
Exchange Act and registered holders of Exchangeable Shares will receive all
disclosure materials that are sent to holders of NPS Common Shares, including
the annual report of NPS and all proxy solicitation materials.

     THE NPS BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE FOR APPROVAL OF
THE ISSUANCE OF NPS COMMON SHARES IN CONNECTION WITH THE ARRANGEMENT.

               THE ARRANGEMENT AGREEMENT AND RELATED AGREEMENTS

     The following paragraphs summarize, among other things, the material terms
of the Arrangement Agreement, a copy of which is attached to this Proxy
Statement as Appendix A, and the terms of which are incorporated by reference
herein in their entirety. NPS Stockholders are urged to read the Arrangement
Agreement in its entirety for a more complete description of the Arrangement.

Effective Date of the Arrangement

     After obtaining the Final Order from the Ontario Court, and subject to the
satisfaction or waiver of the conditions set forth in the Arrangement Agreement,
the Arrangement shall become effective as of the date of issuance of the
certificate of arrangement giving effect to the Arrangement, issued pursuant to
subsection 183(2) of the Business Corporations Act (Ontario) ("OBCA").

Termination

     The Arrangement Agreement may be terminated:

 .    by the delivery by one party to another of a written notice stating that a
     condition precedent for the benefit of the party initiating such notice has
     not been fulfilled or satisfied within the time contemplated by the
     Arrangement Agreement and that the Arrangement Agreement is accordingly
     terminated;

 .    by NPS if the Board of Directors of Allelix has withdrawn or varied in a
     manner determined by NPS to be adverse to NPS, its approval of the
     Arrangement Agreement or the Arrangement or its unanimous recommendation to
     the holders of Allelix Common Shares;

 .    by Allelix if the Board of Directors of NPS has withdrawn its unanimous
     recommendation to the holders of the NPS Common Shares to vote in favor of
     the resolutions contemplated in the Arrangement Agreement to be considered
     at the NPS Special Meeting;

 .    by Allelix in order to enter into a definitive written agreement with
     respect to a Superior Proposal subject to compliance with certain
     conditions;

 .    by the mutual agreement of Allelix and NPS; or

 .    by either NPS or Allelix if there has been passed any law or regulation
     that makes consummation of the transactions contemplated by the Arrangement
     Agreement illegal or otherwise prohibited or if any injunction, order, or
     decree enjoining NPS or Allelix from consummation of the transactions
     contemplated by the Arrangement Agreement is entered into and such
     injunction, order or decree becomes final and non-applicable.

Termination Fees and Expenses

     Allelix is obligated to pay to NPS a termination fee of U.S.$2,000,000 if
any of the following occur:

                                       38
<PAGE>

 .    Allelix breaches its covenants or agreements in the Arrangement Agreement
     in any material respect;

 .    NPS terminates the Arrangement Agreement because the Board of Directors of
     Allelix has withdrawn or varied, in a manner determined by NPS to be
     adverse to NPS, its approval of the Arrangement Agreement or the
     Arrangement or its unanimous recommendation to the holders of Allelix
     Common Shares unless the Board of Directors of Allelix has done so because
     of a material adverse change affecting NPS, and such change is not
     attributable to a material adverse change affecting Allelix;

 .    Allelix terminates the Arrangement Agreement to enter into a definitive
     written agreement with respect to a Superior Proposal subject to compliance
     with certain conditions;

 .    an Acquisition Proposal (as defined in the Arrangement Agreement) is
     announced and is not withdrawn more than two business days prior to the
     date of the Allelix Special Meeting, the holders of the Allelix Common
     Shares do not approve the Arrangement at the Allelix Special Meeting, and a
     significant transaction involving the acquisition of a material portion of
     the assets of Allelix or Allelix Common Shares so as to hold not less than
     twenty percent of the Allelix Common Shares outstanding is completed with
     the party that made the acquisition proposal or an affiliate of such party
     within the twelve months following the date of the Allelix Special Meeting;
     or

     NPS is obligated to pay to Allelix a fee of U.S.$1,000,000 in the event
that:

 .    NPS breaches a covenant or agreement on its part in the Arrangement
     Agreement in any material respect; or

 .    the holders of the NPS Common Shares do not approve the matters relating to
     the Arrangement considered at the NPS Special Meeting except following a
     material adverse change affecting Allelix. The fee shall be increased to
     U.S.$2,000,000 in the event that the Board of Directors of NPS withdraws or
     varies its unanimous recommendation to the holders of NPS Common Shares in
     a manner determined by Allelix to be adverse to Allelix, otherwise than
     because of a material adverse change affecting Allelix.

Conditions to Closing

Mutual Conditions Precedent

     The Arrangement Agreement provides that the respective obligations of each
party to complete the transactions contemplated by the Arrangement Agreement are
subject to the satisfaction, on or before the Effective Date, or at such other
time specified below, of the following conditions precedent:

 .    the Interim Order shall have been granted in form and substance
     satisfactory to Allelix and NPS, acting reasonably, on or before October
     31, 1999 and shall not have been set aside or modified in a manner
     unacceptable to such parties on appeal or otherwise;

 .    the Arrangement shall have been duly approved by the Allelix stockholders,
     with or without amendment, in accordance with the Interim Order, on or
     before January 20, 2000;

 .    each of the resolutions relating to the Arrangement considered at the NPS
     Special Meeting shall have been duly approved by the NPS Common
     Stockholders without amendment on or before January 20, 2000;

 .    Allelix shall have obtained articles of continuance from the Ontario
     Business Corporations Act Director (the "OBCA Director") in form and
     substance satisfactory to Allelix and NPS, acting reasonably;

 .    the Final Order shall have been granted by the Ontario Court in form and
     substance satisfactory to Allelix and NPS, acting reasonably, on or before
     January 31, 2000, and shall not have been set aside or modified in a manner
     unacceptable to such parties on appeal or otherwise;

                                       39
<PAGE>

 .    the Articles of Arrangement relating to the Arrangement shall be in form
     and substance satisfactory to Allelix and NPS, acting reasonably;

 .    the Effective Date shall be on or before January 31, 2000;

 .    no act, action, suit, or proceeding shall have been taken or be outstanding
     before or by any domestic or foreign court or tribunal or governmental
     agency or other regulatory authority or administrative agency or commission
     by any elected or appointed public official or private person (including,
     without limitation, any individual, corporation, firm, group, or other
     entity) in Canada or elsewhere, whether or not having the force of law, and
     no law, regulation, or policy shall have been proposed, enacted,
     promulgated, or applied which, in either case, has effect, or may have
     effect, to cease trade, enjoin, or prohibit the acquisition by NPS of the
     Allelix Common Shares, or the right of NPS to own or exercise full rights
     of ownership of the Allelix Common Shares, or the issuance, pursuant to the
     Arrangement, of NPS Common Shares and Exchangeable Shares to the holders of
     Allelix Common Shares;

 .    there shall not exist any prohibition at law against NPS or Allelix and
     holders of Allelix Common Shares consummating the Arrangement;

 .    Allelix and NPS shall have obtained the consents, approvals, and
     authorizations referred to in Section 3.18 of the Arrangement Agreement and
     such other material consents, approvals, and authorizations (if any),
     regulatory or otherwise, required or necessary in connection with the
     transactions contemplated therein on terms and conditions satisfactory to
     each of them, acting reasonably;

 .    the Exchangeable Shares issuable pursuant to the Arrangement shall have
     been conditionally approved for listing on the TSE subject to the filing of
     the usual and customary documentation;

 .    any required orders from applicable securities authorities authorizing the
     issue of the Exchangeable Shares shall have been obtained on terms
     satisfactory to NPS and Allelix, both acting reasonably;

 .    there shall not have occurred any actual or threatened change, or any
     announcement, governmental or regulatory initiative, condition, event, or
     development involving a change or a prospective change that, in the
     judgment of NPS, acting reasonably, directly or indirectly, has or may have
     a material adverse effect with respect to consummating the proposed
     transaction; and

 .    holders of not more than 10% of Allelix's Common Shares shall have
     exercised dissent rights with respect to the Continuance and the
     Arrangement.

     The foregoing conditions are for the mutual benefit of Allelix and NPS and
may be waived, in whole or in part, by each of Allelix and NPS acting
individually for its own interest at any time. If any of the above conditions
precedent shall not be complied with or waived as aforesaid on or before the
date required for the performance thereof, either Allelix or NPS may, in
addition to the other remedies it may have at law or in equity, rescind and
terminate the Arrangement Agreement by written notice to the other party.

Conditions Precedent for the Benefit of Allelix

     The Arrangement Agreement provides that the obligation of Allelix to
complete the transactions contemplated by the Arrangement Agreement is subject
to the satisfaction or waiver, where permissible, of a number of additional
conditions, including the following:

 .    the representations and warranties made by NPS in the Arrangement Agreement
     shall be true as of the Effective Date as if made on and as of such date
     and NPS shall have provided to Allelix the certificate of one senior
     officer of NPS certifying such accuracy on the Effective Date (and Allelix
     shall have no knowledge to the contrary);

                                       40
<PAGE>

 .    NPS shall have provided Allelix with opinions of NPS's counsel in form and
     substance satisfactory to Allelix, acting reasonably, dated the Effective
     Date (or such other date as Allelix and NPS may agree) and addressed to
     Allelix and Allelix's counsel to the effect that:

     .    NPS is duly incorporated and validly existing under the laws of the
          jurisdiction of its incorporation and has the corporate power and
          authority to carry on any business now conducted by it;

     .    NPS has full corporate power and authority to enter into the
          Arrangement Agreement and to perform its obligations thereunder;

     .    all necessary proceedings, corporate, regulatory or otherwise, of NPS
          have been taken to fully, validly, and effectively authorize the
          Arrangement Agreement and the transactions contemplated therein
          including the Arrangement, the performance by NPS of its obligations
          thereunder, and the execution and delivery by NPS of the Arrangement
          Agreement and all documents delivered pursuant thereto;

     .    each NPS Common Share to be issued under the Arrangement will be
          authorized and reserved for issuance and, when so issued, will be
          validly issued and outstanding as a fully paid and non-assessable
          share in the capital of NPS;

     .    the NPS Common Shares to be issued on exchange of an Exchangeable
          Share shall be immediately tradable upon the Nasdaq Stock Market;

     .    the execution and delivery by NPS of the Arrangement Agreement and all
          documents delivered pursuant thereto, the performance by NPS of its
          obligations thereunder and the consummation of the transactions
          contemplated therein will not result in the breach of or violate any
          term or provision of the articles or by-laws of NPS;

     .    the Arrangement Agreement has been duly executed and delivered by NPS
          and all agreements delivered pursuant to the terms thereof are valid
          and binding obligations of NPS enforceable against it in accordance
          with their respective terms, subject to enforceability being limited
          by applicable bankruptcy, insolvency, reorganization and other laws
          affecting creditors' rights generally and the discretionary nature of
          certain remedies (including specific performance and injunctive
          relief) and subject to the effectiveness of clauses providing rights
          of indemnity or exculpating a party or persons from a liability or a
          duty otherwise owed which may be limited by law; and

     .    the issuance of NPS Common Shares on exchange of an Exchangeable Share
          is exempt from the prospectus and registration requirements of the
          applicable securities laws in each applicable province and no filing,
          proceeding, consent, or approval is required under such applicable law
          in connection with the issuance of such NPS Common Shares and that the
          NPS Common Shares acquired on exchange of an Exchangeable Share will
          not be subject to restrictions on their resale in such provinces,
          other than trades from a control block and excluding any outstanding
          escrow agreements, and in giving such opinion, NPS counsel may rely in
          respect of matters of fact, upon certificates of senior officers of
          NPS or any other appropriate persons, and in respect of matters
          governed by the laws of any jurisdiction other than Delaware and Utah,
          NPS counsel may deliver the opinion of local counsel in such other
          jurisdiction;

 .    the appointment of three Allelix directors, to be jointly designated by NPS
     and Allelix, acting reasonably, to the Board of Directors of NPS;

 .    NPS shall have complied with its covenants in the Arrangement Agreement and
     shall have provided to Allelix the certificate of a senior officer of NPS
     certifying that NPS has complied with its respective covenants therein and
     Allelix shall have no knowledge to the contrary;

 .    between the date of the most recent public disclosure by NPS and the
     Effective Date, there shall not have occurred any material adverse change
     with respect to NPS that is not attributable to a material adverse change
     with respect to Allelix;

                                       41
<PAGE>

 .    NPS, NPS Holdings Inc. (a wholly-owned subsidiary of NPS), and NPS Allelix
     shall have entered into the Support Agreement a copy of which is attached
     hereto as Appendix H; and

 .    NPS, NPS Allelix, and a trust company acceptable to NPS and Allelix, acting
     reasonably, shall have entered into the Voting and Exchange Trust
     Agreement.

     The foregoing conditions precedent are for the benefit of Allelix and may
be waived, in whole or in part, by Allelix in writing at any time. If any of the
conditions shall not be complied with or waived by Allelix on or before the date
required for their performance then Allelix may, in addition to the other
remedies it may have at law or equity, rescind, and terminate the Arrangement
Agreement by written notice to NPS.

Conditions Precedent for the Benefit of NPS

     The Arrangement Agreement provides that the obligation of NPS to complete
the transactions contemplated by the Arrangement Agreement is subject to the
satisfaction or waiver, where permissible, of a number of additional conditions,
including the following:

 .    the representations and warranties made by Allelix in the Arrangement
     Agreement shall be true as of the Effective Date as if made on and as of
     such date and Allelix shall have provided to NPS a certificate of the
     Chairman of the Board of Allelix and the Chief Executive Officer (or such
     other officer of Allelix that may be acceptable to NPS, acting reasonably)
     certifying such accuracy on the Effective Date (and NPS shall have no
     knowledge to the contrary);

 .    Allelix shall have provided NPS with an opinion of Allelix counsel in form
     and substance satisfactory to NPS, acting reasonably dated the Effective
     Date (or such other date as Allelix and NPS may agree) and addressed to NPS
     and NPS counsel to the effect that:

     .    Allelix and each of its material subsidiaries are duly incorporated,
          amalgamated, continued, or formed and existing under the laws of the
          jurisdiction of their respective incorporation or formation, as the
          case may be, and each has the power and authority to carry on any
          business now conducted by it;

     .    Allelix has full corporate power and authority to enter into the
          Arrangement Agreement and to perform its obligations thereunder;

     .    all necessary proceedings, corporate, regulatory or otherwise, of
          Allelix have been taken to fully, validly, and effectively authorize
          the Arrangement Agreement and the transactions contemplated therein
          including the Arrangement, the performance by Allelix of its
          obligations thereunder, and the execution and delivery by Allelix of
          the Arrangement Agreement and all documents delivered pursuant
          thereto;

     .    the execution and delivery by Allelix of the Arrangement Agreement and
          all agreements delivered pursuant thereto, the performance by Allelix
          of its obligations thereunder and the consummation of the transactions
          contemplated therein will not result in the breach of or violate any
          term or provision of the articles or by-laws of Allelix; and

     .    the Arrangement Agreement has been duly executed and delivered by
          Allelix and all agreements delivered pursuant to the terms thereof are
          valid and binding obligations of Allelix enforceable against it in
          accordance with their respective terms, subject to enforceability
          being limited by applicable bankruptcy, insolvency, reorganization,
          and other laws affecting creditors' rights generally and the
          discretionary nature of certain remedies (including specific
          performance and injunctive relief) and subject to the effectiveness of
          clauses providing rights of indemnity or exculpating a party or
          persons from a liability or a duty otherwise owed which may be limited
          by law; and in giving such opinion, Allelix counsel may rely, in
          respect of matters of fact, upon certificates of senior officers of
          Allelix or any other appropriate persons; and in respect of matters
          governed by the laws of any jurisdiction other than Ontario, Quebec,
          Alberta,

                                       42
<PAGE>

          British Columbia, or the laws of Canada applicable therein, Allelix
          counsel may deliver the opinion of local counsel in such other
          jurisdiction;

 .    Allelix shall have complied, in all material respects, with its covenants
     in the Arrangement Agreement and Allelix shall have provided to NPS a
     certificate of the Chairman of the Board of Allelix and the Chief Executive
     Officer (or such other officer of Allelix that may be acceptable to NPS,
     acting reasonably) certifying that Allelix has complied with its covenants
     therein and NPS shall have no knowledge to the contrary;

 .    the Interim Order, the Final Order, and any required orders from the
     applicable securities regulatory authorities authorizing the issuance of
     the Exchangeable Shares shall have been obtained on terms satisfactory to
     NPS, acting reasonably;

 .    between the date of the most recent public disclosure by Allelix, and the
     Effective Date, there shall not have occurred any material adverse change
     with respect to Allelix; and

 .    the Directors of Allelix and its subsidiaries shall have tendered their
     resignations to be effective on the Effective Date.

     The foregoing conditions precedent are for the benefit of NPS and may be
waived in whole or in part by NPS in writing at any time. If any of the above
conditions shall not be complied with or waived by NPS on or before the date
required for the performance thereof, NPS may, in addition to the other remedies
it may have at law or equity, rescind and terminate the Arrangement Agreement by
written notice to Allelix.

General Covenants

Mutual Covenants

     Each of Allelix and NPS has covenanted pursuant to the Arrangement
Agreement, among other things, that, until the Effective Date or the date upon
which the Arrangement Agreement is terminated, whichever is earlier, unless the
other party otherwise agrees, it will:

 .    use all reasonable commercial efforts to satisfy the conditions precedent
     to its respective obligations set out in the Arrangement Agreement and to
     do all other things necessary, proper, or advisable under applicable law to
     complete the Arrangement, including using all reasonable commercial efforts
     to obtain all necessary waivers, consents, approvals, and authorizations
     required to be obtained from other parties under loan agreements, leases,
     and other contracts or otherwise under applicable law and to effect all
     necessary registrations and filings and submissions of information
     requested by governmental authorities required to be effected by it in
     connection with the Arrangement;

 .    make available and cause to be made available to the other party, its
     agents, and advisors, all documents and agreements in any way relating to
     or affecting its business, financial condition, operations, prospects,
     properties, assets, or affairs, except where it is contractually precluded
     from making such document or agreement available in which case it shall
     cooperate with the other party in securing access to any such documentation
     not in its possession or under its control;

 .    not take any action, refrain from taking any action, or permit any action
     to be taken or not taken, inconsistent with the Arrangement Agreement or
     which might, directly or indirectly, interfere with or adversely affect the
     consummation of the Arrangement; and

 .    not, during the period commencing on the date of the Arrangement Agreement
     and ending on the earlier of the Effective Date of the Arrangement and the
     second anniversary of the termination of the Arrangement Agreement,
     directly or indirectly solicit, induce, recruit, or encourage any of the
     other party's employees to terminate their employment with the other party
     or attempt to solicit, induce, or recruit employees of the other party.

                                       43
<PAGE>

Covenants of Allelix

     Allelix has covenanted and agreed pursuant to the Arrangement Agreement
that, until the Effective Date or the date on which the Arrangement Agreement is
terminated, whichever is earlier, it will, among other things:

 .    in a timely and expeditious manner and as soon as reasonably practicable,
     carry out the terms of the Interim Order; convene the Allelix Special
     Meeting; solicit proxies to be voted at the Allelix Special Meeting in
     favor of the Arrangement; provide notice to NPS of the Allelix Special
     Meeting and allow NPS's representatives to attend the Allelix Special
     Meeting; and conduct the Allelix Special Meeting in accordance with the
     Interim Order, the by-laws of Allelix and any instrument governing such
     meeting;

 .    subject to the approval of the Arrangement at the Allelix Special Meeting
     in accordance with the provisions of the Interim Order, file, proceed with,
     and prosecute an application for the Final Order;

 .    subject to approval of the Continuance by at the Allelix stockholders, file
     articles of continuance with the OBCA Director;

 .    forthwith carry out the terms of the Final Order and, subject to the
     receipt of the Final Order, will file the Articles of Arrangement and the
     Final Order with the OBCA Director in order for the Arrangement to become
     effective on or before January 31, 2000;

 .    except with the prior written consent of NPS, not incur significant new
     capital expenditures above specified levels;

 .    except with the prior written consent of NPS, not incur any indebtedness
     for borrowed money; and

 .    except with the prior written consent of NPS, not enter into or agree to
     enter into any licence agreement, collaboration and/or development
     agreement, or any other agreement to sell, convey, transfer, assign, or
     encumber any of its right, title, or interest in any of its research, pre-
     clinical, or clinical development programs.

Covenants of NPS

     NPS has covenanted and agreed pursuant to the Arrangement Agreement that,
until the Effective Date or the date on which the Arrangement Agreement is
terminated, whichever is earlier, it will, among other things:

 .    not issue NPS Common Shares at a price which is less than the then current
     market price on their date of issue, less 10%, except upon the exercise of
     NPS options;

 .    allow Allelix and its counsel to participate fully in the preparation of
     the notice of meeting and Proxy Statement of NPS prepared in connection
     with the NPS Special Meeting;

 .    in a timely and expeditious manner and as soon as practicable but in any
     event not later than January 15, 2000, convene the NPS Special Meeting;

 .    solicit proxies to be voted at the NPS Special Meeting in favor of the
     matters to be considered thereat;

 .    provide notice to Allelix of the NPS Special Meeting and allow Allelix's
     representatives to attend the NPS Special Meeting;

 .    to the extent within its power, forthwith carry out the terms of the
     Interim Order and the Final Order;

 .    appoint on the Effective Date of the Arrangement (i) three Allelix
     directors to the Board of NPS mutually acceptable to Allelix and NPS,
     acting reasonably; and (ii) the individuals holding the positions of Senior
     Vice-President and Chief Financial Officer, and Senior Vice-President,
     Operations of Allelix as officers of NPS;

                                       44
<PAGE>

 .    except with the prior written consent of Allelix, not acquire or agree to
     acquire (by acquisition of securities or assets or otherwise) any
     corporation, partnership, or other business organization or division or any
     assets or properties for consideration of more than U.S.$4,000,000 in
     total; and

 .    except with the prior written consent of Allelix, cause it and its
     subsidiaries to use all reasonable efforts to preserve intact their present
     business, licenses, and permits and will not, nor will it permit its
     subsidiaries to enter into any transaction out of the ordinary course of
     business if the total obligations and commitments of NPS and its
     subsidiaries thereunder would exceed U.S.$4,000,000.

Covenants of Allelix Regarding Non-Solicitation

     Pursuant to the Arrangement Agreement, without the prior written consent of
NPS, from and after the date of the Arrangement Agreement, Allelix and its
material subsidiaries have covenanted that they will not, and will not authorize
or permit any of their representatives to, directly or indirectly, solicit,
initiate, or encourage (including by way of furnishing information) or take any
other action to facilitate any inquiries or the making of any proposal which
constitutes or may reasonably be expected to lead to an Acquisition Proposal, as
defined below, from any person, or engage in any discussions or negotiations
relating thereto or accept any Acquisition Proposal.

     Notwithstanding the above however, Allelix may at any time prior to the
time the Allelix stockholders shall have voted to approve the Arrangement and
the other transactions contemplated thereby, engage in discussions or
negotiations with a third party who (without any solicitation, initiation, or
encouragement, directly or indirectly, by Allelix, any of its subsidiaries or
representatives after the date of the Arrangement Agreement) seeks to initiate
such discussions or negotiations and may furnish such third party information
concerning Allelix and its business, properties, and assets if and only to the
extent that:

 .    the third party has made a Superior Proposal (as defined below) and
     Allelix's Board of Directors has concluded in good faith, after considering
     the applicable law and receiving the advice of outside counsel to this
     effect in writing or recorded in the minutes, that such action is necessary
     for the Board of Directors to act in a manner consistent with its fiduciary
     duties under applicable law; and

 .    prior to furnishing such information to or entering into discussions or
     negotiations with such person or entity, Allelix provides prompt notice to
     NPS to the effect that it is furnishing information to or entering into
     discussions or negotiations with such person or entity and receives from
     such person or entity an executed confidentiality and restricted use
     agreement in reasonably customary form.

     Pursuant to the Arrangement Agreement, Allelix is obligated to notify NPS
orally and in writing of any inquiries, offers or proposals with respect to an
Acquisition Proposal (including without limitation terms and conditions of any
such proposal, the identity of the person making it and all other information
reasonably requested by NPS) within twelve hours of the receipt thereof, shall
answer NPS's questions with respect to such inquiries, offers, or proposals and
shall give NPS five days advance notice of any agreement to be entered into
with, or information to be supplied to, any person making such inquiry, offer or
proposal.

     Allelix has covenanted that it will not enter into any agreement regarding
a Superior Proposal without providing NPS with an opportunity to amend the
Arrangement Agreement to provide for a value per Allelix Common Share at least
equal to that included in the Superior Proposal (as determined in good faith by
the Board of Directors of Allelix after receiving the advice of its financial
advisors to this effect in writing or recorded in the minutes). In particular,
Allelix has covenanted to provide NPS with a copy of any Superior Proposal as
executed by the party making the proposal at least 72 hours prior to its
proposed execution by Allelix. In the event that NPS decides to amend the
Arrangement Agreement as provided above, Allelix has covenanted that it will not
enter into the superior proposed agreement.

     Acquisition Proposal is defined in the Arrangement Agreement to be a
written proposal or offer by any person to acquire beneficial ownership of all
or a material portion of the assets of Allelix (including shares of
subsidiaries) or one or more of its subsidiaries or not less than 10% of the
Allelix Common Shares or of one or more of its subsidiaries pursuant to an
amalgamation, plan of arrangement, consolidation, or other business combination,
sale

                                       45
<PAGE>

of shares, or other securities, sale of assets, take-over bid, or tender offer
or exchange offer or similar transaction involving Allelix or one or more of its
subsidiaries including, without limitation, any single or multi-step transaction
or series of related transactions which is structured to permit such third party
to acquire beneficial ownership or any material portion of the assets of, or
such percentage of the Allelix Common Shares or one or more of its subsidiaries
(other than transactions contemplated by this Agreement).

     Under the Arrangement Agreement, a Superior Proposal is defined as an
Acquisition Proposal that is financially superior to the transaction
contemplated by the Arrangement Agreement which, in any event, shall mean that
such proposal shall offer a value per Allelix common Share greater than the per
share value attributable thereto under the transaction contemplated by the
Arrangement Agreement and the third party making the Superior Proposal has
demonstrated that the funds or other consideration necessary for the Acquisition
Proposal are reasonably likely to be available.

Covenants of NPS Regarding No Shop

     Without the prior written consent of Allelix, from and after the date of
the Arrangement Agreement, NPS will not, and will not authorize or permit any of
its representatives to, directly or indirectly, solicit, initiate, or encourage
or take any other action to facilitate any inquiries or the making of a proposal
which constitutes or may be reasonably expected to lead to a NPS Acquisition
Proposal, as defined below, from any person engaged in any discussions or
negotiations relating thereto or accept any Acquisition Proposal. "NPS
Acquisition Proposal" is defined in the Arrangement Agreement to be a written
proposal or offer by any person to acquire not less than 20% of the NPS Common
Shares (other than NPS Common Shares issuable on the exercise of outstanding
options or warrants of NPS) by business combination, sale of issued or treasury
shares, or tender or exchange offer or similar transaction, including, without
limitation, any single or multi-step transaction or series of related
transactions which is structured to permit a party to acquire such NPS Common
Shares. However, NPS may engage in discussions or negotiations at any time with
a third party who seeks to initiate such discussions and may furnish such third
party with information concerning NPS if the Board of Directors of NPS has
concluded, in good faith, after considering applicable law and receiving the
advice of counsel, that such action is necessary for the Board to act in a
manner consistent with its fiduciary duties.

Representations and Warranties

Mutual Representations and Warranties

     The Arrangement Agreement contains a number of mutual representations and
warranties of Allelix and NPS, relating to, among other things:

 .    the corporate existence, organization, and qualification of each of Allelix
     and NPS;

 .    authorization, execution, delivery, and enforceability of the Arrangement
     Agreement;

 .    the absence of any violations, conflicts, breaches, defaults, rights,
     encumbrances, suspensions, revocations, or lack of consents, approvals or
     notices which would have a material adverse effect on the party giving the
     representation and warranty;

 .    the absence of any outstanding actions, suits, proceedings, or
     investigations, either commenced, contemplated or threatened against either
     of Allelix or NPS, including their respective subsidiaries, which could
     reasonably be expected to have a material adverse effect on the party
     giving the representation and warranty;

 .    the financial statements of the party giving the representation and
     warranty;

 .    minute books and records;

 .    the filing of tax returns and the payment of taxes;

                                       46
<PAGE>

 .    the maintenance of insurance;

 .    environmental matters;

 .    employment agreements and labor matters;

 .    the obtaining by Allelix and NPS of various consents and approvals except
     where the failure to obtain such consent or approval would not constitute a
     material adverse effect to the party giving the representation and
     warranty; and

 .    intellectual property rights.

Representations and Warranties of Allelix

     The Arrangement Agreement contains a number of additional representations
and warranties of Allelix relating to, among other things:

 .    the capitalization of Allelix;

 .    the status of Allelix as a reporting issuer under the securities laws of
     each province of Canada and the listing of all issued and outstanding
     Allelix Common Shares on the TSE;

 .    the truth and correctness of the material provided by Allelix for inclusion
     in this Proxy Statement; and

 .    the 1999 audited financial statements of Allelix.

     Allelix has also represented and warranted that the Board of Directors of
Allelix has: (i) unanimously determined that the Arrangement is fair to the
holders of Allelix Common Shares and that the Arrangement is in the best
interests of Allelix and the holders of Allelix Common Shares; (ii) approved the
Arrangement and the entering into and execution of the Arrangement Agreement;
and (iii) resolved to recommend that the holders of the Allelix Common Shares
vote in favor of the Arrangement.

Representations and Warranties of NPS

     The Arrangement Agreement contains a number of additional representations
and warranties of NPS relating to, among other things: (i) the capitalization of
NPS; (ii) the status of NPS as a reporting company under the Exchange Act; and
(iii) the truth and correctness of the material provided by NPS for inclusion in
the Proxy Circular of Allelix. NPS has also represented and warranted that the
Board of Directors of NPS has unanimously approved the Arrangement Agreement and
has determined to recommend that the holders of the NPS Common Shares vote in
favor of the matters contemplated by the Arrangement Agreement to be voted on at
the NPS Special Meeting.

Confidentiality

     Each of Allelix and NPS acknowledged and agreed pursuant to the Arrangement
Agreement that it will not use confidential information for any purpose
whatsoever other than for purposes specifically relating to evaluation of the
proposed transaction, and that any confidential information provided to a party
to the Arrangement Agreement (the "receiving party") in written form shall be
returned to the party supplying the same (the "supplier") forthwith upon the
Arrangement Agreement being terminated. Each of Allelix and NPS further agreed
pursuant to the Arrangement Agreement that no written materials, reproductions,
extracts, typed or hand written notes, or memorandums made from, or relating in
any way to, the confidential information shall be retained by such parties after
the termination of the Arrangement Agreement and, upon any such occurrence, all
such materials, extracts, notes, and memorandums shall be destroyed unless
returned to the supplier, and the receiving party shall, upon the request of the
supplier, provide a statutory declaration as to that fact, from an officer.

                                       47
<PAGE>

     Pursuant to the Arrangement Agreement, each of Allelix and NPS further
undertook and agreed with the supplier that such receiving party shall keep such
confidential information in strict confidence, and shall not disclose any such
confidential information to any third party or parties whatsoever except in
strict accordance. Disclosure of the confidential information may be made by or
on behalf of the receiving party to its employees and professional advisors who
have a need to know such confidential information for purposes of considering
the making of a bona fide evaluation of the proposed transaction, provided that
all such persons agree to keep such information confidential and to be bound by
the Arrangement Agreement to the same extent as if they were parties thereto.
Disclosure of the confidential information may be made by or on behalf of the
receiving party, or any other party to whom disclosure has been made in
accordance therewith, if required by law, provided however, that upon receipt of
any such request or order for such disclosure, the receiving party or such other
party to whom the request for disclosure is made, shall notify the supplier that
a request has been made for disclosure in order that the supplier may seek any
appropriate protective order or waive compliance by the receiving party with the
provision of the Arrangement Agreement.

     The restrictions on the use and disclosure of the confidential information
set forth in the Arrangement Agreement shall not apply if:

 .    the confidential information is or becomes publicly available other than
     through a breach of the Arrangement Agreement by either party to whom
     disclosure is made;

 .    the confidential information is subsequently lawfully obtained without a
     secrecy obligation from a third party or parties not in a contractual or
     fiduciary relationship with any member of the party receiving the
     Confidential Information (the "receiving party"), other than through a
     breach of the Arrangement Agreement, provided that written supporting
     documentation confirming the lawful authority of such third party or
     parties to disclose the confidential information is provided to the
     supplier;

 .    the confidential information was known by the receiving party or other
     parties prior to the time at which disclosure of such confidential
     information was made to the receiving party or such other parties in
     accordance with the Arrangement Agreement, provided that written supporting
     documentation confirming that fact is provided to the supplier; or

 .    the written consent of the supplier is given prior to any such use or
     disclosure being made.

     Each of Allelix and NPS agreed pursuant to the Arrangement Agreement that
it would be difficult to measure the damage to the other party resulting from
the breach of such party's obligations under such confidentiality provisions,
that injury to the other party from any such breach would be impossible to
calculate, and that monetary damages would therefore be an inadequate remedy;
accordingly, each party agreed that the other party shall be entitled, in
addition to all other remedies it might have, to injunctions or other
appropriate orders to restrain any such breach without showing or providing any
actual damage or posting any bond or other security in connection with such
remedy.

Standstill

     Each of Allelix and NPS has agreed pursuant to the Arrangement Agreement
that neither it nor an affiliate will, prior to June 27, 2000, without the prior
written consent of the other party, among other things:

 .    acquire, offer, or agree to acquire, directly or indirectly, by purchase or
     otherwise, individually or in concert with any other person, any voting
     securities or securities convertible into or exchangeable for voting
     securities, of the other party;

 .    directly or indirectly make, or in any way participate in, any solicitation
     of proxies to vote, or seek to advise or influence any other person with
     respect to the voting of any voting securities of the other party; or

 .    act alone or in concert with others to seek to control the management,
     directors, or corporate policies of the other party.

                                       48
<PAGE>

     The above restrictions will not apply in the event an offer is made (and
not withdrawn at the time the conduct otherwise prohibited above has commenced)
to acquire beneficial ownership of all or a material portion of the assets of
the other party or one or more of its subsidiaries or not less than 20% of the
issued and outstanding common shares of the other party pursuant to a
transaction to be considered at a meeting of security holders requisitioned by a
security holder of such other party or pursuant to a take-over bid, tender
offer, or similar transaction involving the other party.

Access

     Allelix has covenanted pursuant to the Arrangement Agreement that NPS will
be entitled, on reasonable notice to Allelix, to access Allelix's premises and
will be entitled to meet with Allelix's shareholders, creditors, licensors,
licensees, and employees. Allelix and its subsidiaries must keep NPS fully
informed as to its and its subsidiaries' business and affairs and as to the
decisions required with respect to the most advantageous methods of operating
and producing from its and its subsidiaries' assets.

Amendment

     The Arrangement Agreement may, at any time and from time to time before or
after the holding of the Allelix Special Meeting, be amended by written
agreement of the parties thereto without further notice to or authorization on
the part of their respective shareholders, and any such amendment may, without
limitation:

 .    change the time for performance of any of the obligations or acts of the
     parties thereto;

 .    waive any inaccuracies or modify any representation contained therein or in
     any document delivered pursuant hereto;

 .    waive compliance with or modify any of the covenants therein contained and
     waive or modify performance of any of the obligations of the parties
     thereto; and

 .    waive compliance with or modify any conditions precedent therein contained;

provided that, notwithstanding the foregoing, the number of Exchangeable Shares
which the holders of Allelix Common Shares shall have the right to receive on
the Arrangement may not be reduced without the approval of the holders of the
Allelix Common Shares given in the same manner as required for the approval of
the Arrangement or as may be ordered by the Ontario Court.

Support Agreement

     The following is a summary of the material provisions of to the Support
Agreement, a copy of which is attached to this Proxy Statement as Appendix H,
and incorporated by reference herein. Statements made herein with respect to the
Support Agreement are qualified in their entirety by the more detailed
information set forth in the Support Agreement. Pursuant to the Support
Agreement, NPS will make the following covenants for so long as any Exchangeable
Shares (other than Exchangeable Shares owned by NPS or its affiliates) remain
outstanding:

 .    NPS will not declare or pay dividends on the NPS Common Shares unless NPS
     Allelix is able to declare and pay and simultaneously declares or pays, as
     the case may be, an equivalent dividend on the Exchangeable Shares;

 .    NPS will advise NPS Allelix in advance of the declaration of any dividend
     on the NPS Common Shares and ensure that the declaration date, record date
     and payment date for dividends on the Exchangeable Shares are the same as
     that for the corresponding dividend on the NPS Common Shares;

 .    NPS will ensure that the record date for any dividend declared on the NPS
     Common Shares is not less than ten business days after the declaration date
     of such dividend; and

                                       49
<PAGE>

 .    NPS will take all actions and do all things reasonably necessary or
     desirable to enable and permit NPS Allelix, in accordance with applicable
     law, to comply with any Retraction Request by a holder of Exchangeable
     Shares, effectuate a redemption of the Exchangeable Shares and/or make
     distributions under the Exchangeable Shares Provisions to the holders of
     Exchangeable Shares upon the liquidation of NPS.

     The Support Agreement and the Exchangeable Share provisions provide that,
without the prior approval of NPS Allelix and the holders of Exchangeable
Shares, NPS will not issue or distribute additional NPS Common Shares,
securities exchangeable for or convertible into or carrying rights to acquire
NPS Common Shares, or rights to subscribe therefor or other assets to all or
substantially all holders of NPS Common Shares, nor change the NPS Common
Shares, unless the same or an economically equivalent distribution on or change
to the Exchangeable Shares (or in the rights of the holders thereof) is made
simultaneously. The Board of Directors of NPS Allelix is conclusively empowered
to determine in good faith and in its sole discretion whether any corresponding
distribution on or change to the Exchangeable Shares is the same as or
economically equivalent to any proposed distribution on or change to the NPS
Common Shares. In the event of any proposed tender offer, share exchange offer,
issuer bid, take-over bid, or similar transaction with respect to the NPS Common
Shares which is recommended, approved, or consented to by the Board of Directors
of NPS and in connection with which the Exchangeable Shares are not redeemed by
NPS Allelix or purchased by NPS Holdings, pursuant to the Redemption Call Right,
NPS will use reasonable efforts to take all actions necessary or desirable to
enable holders of Exchangeable Shares to participate in such transaction to the
same extent and on an economically equivalent basis as the holders of NPS Common
Shares.

     NPS Allelix is required to notify NPS and NPS Holdings of the occurrence of
certain events, such as the liquidation, dissolution, or winding-up of NPS
Allelix, and NPS Allelix's receipt of a Retraction Request from a holder of
Exchangeable Shares.

     Under the Support Agreement, NPS has agreed not to exercise any voting
rights attached to the Exchangeable Shares owned by it or any of its affiliates
on any matter considered at meetings of holders of Exchangeable Shares. NPS has
also agreed to use its reasonable efforts to enable NPS Allelix to maintain a
listing for the Exchangeable Shares on a Canadian stock exchange.

     With the exception of administrative changes for the purpose of adding
covenants for the protection of the holders of Exchangeable Shares, making
certain necessary amendments or curing ambiguities or clerical errors (in each
case provided that the Board of Directors of each of NPS, NPS Allelix, and NPS
Holdings are of the opinion that such amendments are not prejudicial to the
rights or interests of the holders of Exchangeable Shares), the Support
Agreement may not be amended without the approval of the holders of Exchangeable
Shares.

Voting and Exchange Trust Agreement

     The following is a summary of the material provision of the Voting and
Exchange Trust, a copy of which is attached hereto as Appendix F, and
incorporated herein by reference. Statements made herein are qualified in their
entirety by the more detailed information set forth in the Voting and Exchange
Trust Agreement.

     On the Effective Date, NPS, NPS Allelix, and a trust company mutually
acceptable to NPS and Allelix (the "Trustee") will enter into the Voting and
Exchange Trust Agreement in substantially the form attached hereto as Appendix
F. Pursuant to the Voting and Exchange Trust Agreement, the terms of which are
incorporated herein, NPS will issue the NPS Special Voting Share to the Trustee
for the benefit of the holders of Exchangeable Shares. The NPS Special Voting
Share will have the number of votes, which may be cast at any meeting at which
holders of NPS Common Shares are entitled to vote, equal to the number of
outstanding Exchangeable Shares held by the registered holders from time to time
of Exchangeable Shares.

     Each holder of Exchangeable Shares on the record date for any meeting at
which holders of NPS Common Shares are entitled to vote will be entitled to
instruct the Trustee to exercise one of the votes attached to the NPS Special
Voting Share for each Exchangeable Share held by such holder. The Trustee will
exercise (either by proxy or in person) each vote attached to the NPS Special
Voting Share only as directed by the relevant holder and, in the

                                       50
<PAGE>

absence of instructions from an Exchangeable Share holder as to voting, will not
exercise such votes. An Exchangeable Share holder may, upon instructing the
Trustee, obtain a proxy from the Trustee entitling the beneficiary to vote
directly at the relevant meeting the votes attached to the NPS Special Voting
Share to which the beneficiary is entitled.

     All rights of a holder of Exchangeable Shares to exercise votes attached to
the NPS Special Voting Share will cease upon the exchange by the holder of such
Exchangeable Shares for NPS Common Shares.

                PROPOSAL TWO - APPROVAL OF THE AMENDMENT OF THE
                       NPS CERTIFICATE OF INCORPORATION

     The NPS Board of Directors has approved and submitted for a vote with the
NPS Stockholders a Certificate of Amendment to the Amended and Restated
Certificate of Incorporation of NPS (the "Certificate of Amendment"), a copy of
which is attached hereto as Appendix C.

     Conditional upon satisfaction of the various conditions to closing in the
Arrangement Agreement, the Certificate of Amendment increases the total number
of shares of capital stock authorized from 25,000,000 shares to 50,000,000
shares and increases the total number of shares of NPS Common Stock authorized
from 20,000,000 to 45,000,000 shares.

     Such amendments to the authorized capital of NPS are needed in order for
the Allelix stockholders to receive the consideration contemplated by the
Arrangement Agreement and for further issuances of NPS Common Stock as
contemplated by the Arrangement in the ordinary course of business. Upon
consummation of the Arrangement (assuming no exercise of outstanding options or
other rights to purchase NPS Common Stock or Allelix Common Stock, and no
exercise of other outstanding rights to purchase Allelix Common Stock), an
aggregate of approximately 19,519,846 shares of NPS Common Stock will be issued
and outstanding on the expected Effective Date.

     Based on NPS's need to authorize additional shares of its capital stock in
connection with the Arrangement and pursuant to the terms of the Arrangement
Agreement, the Arrangement will occur only if the Certificate of Amendment is
approved by the NPS Stockholders.

     THE NPS BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE FOR APPROVAL OF
THE CERTIFICATE OF AMENDMENT.

                  INCOME TAX CONSEQUENCES TO NPS STOCKHOLDERS

     There are no tax consequences to NPS Stockholders as a result of the
Arrangement.

                        INFORMATION CONCERNING ALLELIX

Business of Allelix

     Allelix is governed by the provisions of the Canadian Business Corporations
Act ("CBCA"). Allelix was originally incorporated in 1981 as Allelix Inc. and
its original emphasis was on agricultural biotechnology and human diagnostics.
In October 1989, as a result of a management buy-out, Allelix redirected its
focus to human therapeutics and changed its name to Allelix Biopharmaceuticals
Inc.

     Allelix is a biopharmaceutical company that applies proprietary
technologies to the identification of disease targets and to the discovery,
design, and development of novel pharmaceutical products. Products will either
be commercialized in partnership with leading biotechnology and multinational
pharmaceutical companies for global markets or by the company itself for
identified market indications.

     Allelix discovers products by applying chemical and biological approaches
to disease targets identified through biotechnology. Allelix has completed a
Phase II clinical trial for its leading product candidate: ALX1-11, a

                                       51
<PAGE>

recombinant form of human parathyroid hormone, for the treatment of
postmenopausal osteoporosis and is preparing to initiate a Phase III trial in
the first half of 2000. ALX-0600, for gastrointestinal disorders, has completed
Phase I and is recruiting patients for a pilot Phase II trial in short bowel
syndrome. ALX-0646 for migraine is approaching Phase II trials and ALE-26015 for
dementia is in Phase I trials. The product pipeline includes a series of GlyT-1
and GlyT-2 inhibitors for schizophrenia and pain together with other
neuroscience compounds. Allelix has developed core capabilities in two areas of
pharmaceutical drug discovery: protein therapeutics (particularly recombinant
production of proteins and peptides) and receptor- and transporter-based drug
design (focused specifically in neuroscience. Allelix believes that these core
capabilities represent technology platforms, which can be applied to support
development of additional product candidates.

     Allelix discovers, patents, and develops promising lead compounds as human
therapeutics. If such products are successfully commercialized, they typically
enjoy significant periods of market exclusivity (depending on patent protection
granted). To achieve profitable operations Allelix, alone or with others, must
successfully develop and obtain regulatory approvals to market its products. To
obtain these regulatory approvals and to achieve commercial success clinical
trials must demonstrate that the products are safe for use in humans and that
they are effective. There can be no assurances that the research and development
conducted by Allelix will result in commercially viable products.

     All of Allelix's products are in either the research or the development
stage and therefore Allelix does not generate revenue from product sales.
Allelix funds its operations with the proceeds from collaborations with
corporate partners, the sale of equity, interest income and government grants
and loans.

     Allelix forms strategic collaborations with established pharmaceutical
companies to exploit fully its technological strengths in drug discovery and
gain access to worldwide pharmaceutical markets. Allelix currently has three
significant collaborative agreements with established pharmaceutical companies:
two agreements with Eli Lilly Canada Inc. to discover new drugs for psychiatric,
neurological, and eating disorders, an agreement with Janssen Pharmaceutical
N.V. to discover new drugs for schizophrenia and/or dementia. To strengthen and
accelerate its research and development efforts, Allelix also has established a
network of collaborations with universities, academics, clinicians, and research
institutions.

     In deciding to initiate, continue, or discontinue scientific programs,
management rigorously evaluates each discovery target and product candidate from
a commercial perspective, focusing on unserved or unmet medical needs which
represent significant commercial opportunities. Market size, development cost,
competitive environment, intellectual property protection, and attractiveness to
potential pharmaceutical industry partners, among other factors impact the
commercial opportunity.

     Allelix's business strategy is to enhance shareholder value by bring novel
products to market as rapidly as possible; developing technology platforms for
drug discovery and development; collaborating with established pharmaceutical
companies for broad-based clinical trials and worldwide commercialization; while
building and maintaining strong relationships with universities, academics,
clinicians, and research institutions to gain access to novel product candidates
and technologies. Patent protection is secured wherever possible. It is
Allelix's full intent to reach profitability in as short a time period as
possible.

     Allelix's business is divided into two primary areas: Protein Therapeutics
and Neuroscience.

     The primary focus within Protein Therapeutics is the development and
commercialization of protein-based drugs for treating medical diseases or
disorders related to hormone abnormalities or deficiencies, for example, PTH
(parathyroid hormone) for the treatment of post-menopausal osteoporosis. The
group has experience in microbiology, protein manufacturing, purification, and
analytical chemistry.

     The primary focus within Neuroscience is the use of rational drug design to
develop novel drug candidates for the treatment of psychiatric, neurological,
and immunological disorders. The group has demonstrated its ability to discover
and utilize human neuroreceptors, ion channels, and neurotransporters for drug
screening. The unit is currently developing product candidates for
neuropsychiatric disorders such as schizophrenia and dementia, pain (migraine,
neuropathic) as well as diabetes and obesity.

                                       52
<PAGE>

Documents Included as Appendices

     The following documents, attached hereto as appendices were also filed by
Allelix with the Canadian securities regulatory authorities. The appendices form
an integral part of this Proxy Statement. Copies of the Appendices were filed
electronically with this Proxy Statement with the SEC. NPS Stockholders are
urged to review carefully all the information contained in the following
appendices concerning Allelix:

 .    Allelix's Annual Information Form dated January 14, 1999, which is attached
     to this Proxy Statement as Appendix H;

 .    Allelix's Management Proxy Circular dated on or about November 15, 1999,
     which is attached to this Proxy Statement as Appendix E;

 .    Allelix's Audited Consolidated Financial Statements for the year ended
     August 31, 1999, which are attached to this Proxy Statement as Appendix J;

 .    Allelix's Management's Discussion and Analysis of Financial Condition and
     Results of Operation for the year ended August 31, 1999, which is attached
     to this Proxy Statement as Appendix K; and

 .    Allelix's Form 27 Material Change Reports dated October 6, 1999, which is
     attached to this Proxy Statement as Appendix L.

     Any documents of the type referred to in the preceding paragraph (excluding
confidential material change reports) filed by Allelix with the Canadian
securities regulatory authorities after the date of this Proxy Statement and
prior to the Effective Time shall be deemed to be incorporated by reference in
this Proxy Statement.

     Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for the purposes of this Proxy Statement to the extent that a statement
contained herein, or in any other subsequently filed document which also is or
is deemed to be incorporated by reference herein, modifies or supersedes that
statement. Any statement so modified or superseded shall not be deemed, except
as so modified or superseded, to constitute a part of this Proxy Statement. The
making of a modifying or superseding statement shall not be deemed an admission
for any purposes that the modified or superseded statement, when made,
constituted a misrepresentation, an untrue statement of a material fact or an
omission to state a material fact that is required to be stated or that is
necessary to make a statement not misleading in light of the circumstances in
which it was made.

1999 Financial Results and Management's Discussion and Analysis of Financial
Condition and Results of Operations ("MD&A")

     On October 21, 1999, the Board of Directors of Allelix approved Allelix's
Audited Consolidated Financial Statements for the year ended August 31, 1999, a
copy of which is attached to this Proxy Statement as Appendix J. A copy of
Management's Discussion and Analysis of Financial Condition and Results of
Operations for the year ended August 31, 1999 is attached to this Proxy
Statement as Appendix E.

Directors and Officers

     On November 8, 1999, the directors and officers of Allelix as a group
beneficially owned or had voting control or direction over 4,394,329 Allelix
Common Shares carrying approximately 21.8% of the number of votes entitled to be
cast at the Allelix Special Meeting by the holders of Allelix Common Shares.

                                       53
<PAGE>

     As of the date hereof, the name and municipality of residence of each
director and officer of Allelix, the date when each became a director or officer
and the principal occupation of each during the past five years were as follows:

<TABLE>
<CAPTION>
     ----------------------------------------------------------------------------------------------------------------------
                                                                                                             Director/
                                                                                                              Officer
         Name/Residence            Position                       Principal Occupation                         Since
     ----------------------------------------------------------------------------------------------------------------------
     <S>                           <C>                 <C>                                                   <C>
     George E. Connell, Ph.D.      Director            President Emeritus, University of Toronto              1995
     Toronto, Ontario
     ----------------------------------------------------------------------------------------------------------------------
     William W. Crouse             Director            Managing Director, HealthCare Ventures L.L.C.          1997
     Princeton, NJ
     ----------------------------------------------------------------------------------------------------------------------
     John R. Evans, M.D.           Director            Chairman of Allelix, Chairman of Torstar               1983
     Toronto, Ontario                                  Corporation, and Chairman of Alcan Aluminum, Ltd.
     ----------------------------------------------------------------------------------------------------------------------
     Irving S. Johnson, Ph.D.      Director            Biomedical Research Consultant since 1988, prior       1992
     Sanibel Island, Florida                           thereto, Vice President, Research, Eli Lilly &
                                                       Co., (a pharmaceutical company)
     ----------------------------------------------------------------------------------------------------------------------
     Edward Rygiel                 Director            President and Chief Executive Officer, MDS Capital     1989
     Toronto, Ontario                                  Corp., (a venture capital corporation)
     ----------------------------------------------------------------------------------------------------------------------
     Nelson Sims                   Director            Executive Director of Alliance Management, Eli         1995
     Indianapolis, Indiana                             Lilly & Company
     ----------------------------------------------------------------------------------------------------------------------
     Calvin R. Stiller, M.D.       Director            Chairman and Chief Executive Officer of Canadian       1999
     Arva, Ontario                                     Medical Discoveries Fund Inc.; prior thereto,
                                                       Professor, Department of Medicine, University of
                                                       Western Ontario
     ----------------------------------------------------------------------------------------------------------------------
     Graham Strachan               Director            President and Chief Executive Officer of Allelix       1989
     Toronto, Ontario                                  (retired)
     ----------------------------------------------------------------------------------------------------------------------
     James R. Howard-Tripp         Senior Vice         Senior Vice President, Neuroscience, Vice              1996
     Burlington, Ontario           President,          President, Business Development, prior thereto,
                                   Neuroscience        Vice President, Business Development, Wyeth-Ayerst
     ----------------------------------------------------------------------------------------------------------------------
     Paul J. Van Damme             Senior Vice         Senior Vice President, Chief Financial Officer and     1997
     Toronto, Ontario              President, Chief    Corporate Secretary; prior thereto, Vice
                                   Financial Officer   President, Finance and Chief Financial Officer,
                                   and Corporate       GlycoDesign Inc.; prior thereto, Senior
                                   Secretary           Vice-President and Chief Financial Officer,
                                                       TeleZone Corporation.
     ----------------------------------------------------------------------------------------------------------------------
</TABLE>

     From among its members, the Board of Directors appoints a number of
committees with specific duties, including an Audit Committee, a Compensation
Committee, and a Corporate Governance Committee. The members of the Audit
Committee are Dr. George Connell and Edward Rygiel. The members of the
Compensation Committee are Dr. George Connell, Dr. John Evans, Edward Rygiel,
and Nelson Sims. The members of the Corporate Governance Committee are all of
the directors of Allelix except the President and Chief Executive Officer.

Indebtedness of Directors and Senior Officers of Allelix

     None of the directors, executive officers or senior officers of Allelix is,
as of the date hereof, in any way, directly or indirectly, indebted to Allelix
by way of a guarantee, support agreement, or letter of credit or other similar
arrangement or understanding provided by Allelix.

Share Capital Matters

     The authorized capital of Allelix consists of an unlimited number of common
shares and an unlimited number of preferred shares issuable in series.

                                       54
<PAGE>

Allelix Preferred Shares

     On November 8,1999, there were 1,000 Allelix Preferred Shares outstanding.
Pursuant to the share conditions attached to the Allelix Preferred Shares (the
"Preferred Share Conditions") the Allelix Preferred Shares automatically convert
into fully paid non-assessable Allelix Common Shares no later than April 30,
2000. The Preferred Shares Conditions provide that each Allelix Preferred Share
is convertible at the option of the holder into that number of Allelix Common
Shares equal to the number determined by dividing the stated value of each
Allelix Preferred Share (U.S.$2,000) by the conversion price (the "Conversion
Price") being equal to 80% of the arithmetic average of the closing price of the
Allelix Common Shares on the TSE for the 20 trading days on which the Allelix
Common Shares were traded immediately preceding the conversion date, subject to
a maximum Conversion Price of U.S.$9.00 and a minimum Conversion Price of
Cdn.$3.36. This minimum Conversion Price has been in effect during each trading
day between September 28, 1999, the date of first public announcement of the
Arrangement and November 11, 1999. Pursuant to the Plan of Arrangement, each
Allelix Preferred Share will be automatically exchanged on or before April 30,
2000 for that number of NPS Common Shares equal to the amount determined by
dividing the stated value of each Allelix Preferred Share (U.S.$2,000) by 80% of
the Current Market Price of the NPS Common Shares which in any event shall not
be more than U.S.$27.79 or less than U.S.$10.38. The Current Market Price
maximum and minimum amounts of $U.S.$27.79 and U.S.$10.38, respectively, were
determined by dividing the corresponding amounts currently provided for in the
Preferred Share Conditions (U.S.$9.00 and $3.36, respectively), by the Exchange
Ratio.

Allelix Common Shares

     As of November 8, 1999, there were 20,126,232 Allelix Common Shares issued
and outstanding. Holders of Allelix Common Shares are entitled to one vote for
each share held at all meetings of shareholders, other than meetings at which
only holders of another specified class or series are entitled to vote and are
entitled to receive dividends as and when declared by the Board of Directors of
Allelix from time to time. On the liquidation, dissolution, or winding up of
Allelix, holders of Allelix Common Shares (subject to the rights of holders of
any shares ranking prior to the Allelix Common Shares) are entitled to receive
the remaining property of Allelix.

Stock Exchange Listings

     The Allelix Common Shares are listed on the TSE and the ME.

Auditors, Transfer Agents and Registrars

     The auditors of Allelix are Ernst & Young LLP, Toronto. The transfer agent
and registrar for the Allelix Common Shares and the Allelix Preferred Shares is
CIBC Mellon Trust Company (Toronto).

                                 LEGAL MATTERS

     Certain legal matters in connection with the Arrangement will be passed
upon for NPS by Blake Cassels & Graydon, Toronto, Ontario and James U. Jensen,
Vice President of Legal Affairs of NPS Pharmaceuticals, Inc.

                                       55
<PAGE>

                  REPRESENTATIVES OF INDEPENDENT ACCOUNTANTS

     Representatives of KPMG LLP are expected to be present at the NPS Special
Meeting. While such representatives have stated that they do not plan to make a
statement at such meetings, they will be available to respond to appropriate
questions from stockholders in attendance.

                                        By Order of the Board of Directors


                                        /s/ James U. Jensen
                                        James U. Jensen, Secretary

                                       56
<PAGE>

                                                                     EXHIBIT 2.1


                             ARRANGEMENT AGREEMENT
                             ---------------------

          THIS AGREEMENT made as of September 27, 1999

BETWEEN:


          ALLELIX BIOPHARMACEUTICALS INC., a corporation subsisting pursuant to
          the laws of Canada ("Allelix")

                                                               OF THE FIRST PART

AND

          NPS PHARMACEUTICALS, INC., a corporation  subsisting pursuant to the
          laws of Delaware ("NPS")

                                                              OF THE SECOND PART

          WHEREAS Allelix and NPS wish to propose an arrangement involving
Allelix, the Allelix Shareholders (as hereinafter defined) and NPS;

          AND WHEREAS the parties hereto intend to carry out the transaction
contemplated herein by way of an arrangement under the provisions of the Canada
Business Corporations Act and the Business Corporations Act (Ontario);

          AND WHEREAS the parties hereto have entered into this Agreement to
provide for the matters referred to in the foregoing recitals and for other
matters relating to such arrangement;

          NOW THEREFORE THIS AGREEMENT WITNESSETH that, in consideration of the
covenants and agreements herein contained and other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties hereto do hereby covenant and agree as follows:


                                   ARTICLE 1
                                INTERPRETATION
1.1  Definitions

     In this Agreement, unless the context otherwise requires:

     "Agreement" means this Arrangement Agreement;


                                      A-1
<PAGE>

     "Allelix Common Shares" means the common shares of Allelix as constituted
     on the date hereof;

     "Allelix Counsel" means Stikeman, Elliott and Testa, Hurwitz & Thibeault
     LLP, or such other counsel as may be appointed by Allelix;

     "Allelix Financial Statements" means the comparative consolidated financial
     statements (including consolidated balance sheets and consolidated
     statements of loss and deficit and consolidated statements of changes in
     financial position, together with notes thereto) for Allelix's fiscal year
     ended August 31, 1998 (audited) and the nine month period ended May 31,
     1999 (unaudited);

     "Allelix Meeting" means the special meeting of Allelix Shareholders, as
     ordered by the Interim Order and all adjournments and postponements
     thereof, to consider and, if determined advisable, approve the repricing of
     certain Allelix Options as approved by the Allelix board of directors on
     April 15, 1999 and consider and, if determined advisable, approve a special
     resolution (the "Continuance Resolution") approving the continuance of
     Allelix as an Ontario corporation under the OBCA and the Arrangement
     Resolution;

     "Allelix Options" means the options to purchase Allelix Common Shares
     issued from time to time prior to the date hereof pursuant to the Allelix
     Stock Option Plan;

     "Allelix Preferred Shares" means the preferred share, series 1 shares of
     Allelix as constituted on the date hereof;

     "Allelix Shareholders" means the registered holders of Allelix Common
     Shares;

     "Allelix Stock Option Plan" means the employee stock option plan dated
     December 19, 1999 of Allelix;

     "Allelix Subsidiaries" means Allelix Neuroscience Inc., Allelix Pharm-Eco
     LP and Allelix Pharm-Eco Inc.;

     "Allelix Warrants" means the warrants to purchase Allelix Common Shares
     issued from time to time prior to the date hereof;

     "Applicable Law" means, in relation to any Person, transaction or event,
     all applicable provisions (or mandatory applicable provisions, if so
     specified) of laws, statutes, regulations, rules, official directives and
     orders of all stock exchanges and   governmental bodies (whether
     administrative, legislative, executive or otherwise) and judgments, orders,
     rulings and decrees of all courts, arbitrators, commissions or bodies
     exercising similar functions in actions or proceedings in which the Person
     in question is a party or by which it is bound or having application to the
     transaction or event;

     "Arrangement" means the arrangement under the provisions of Section 182 of
     the OBCA, on the terms and conditions set forth in the Plan of Arrangement
     as such Plan

                                      A-2
<PAGE>

     may be amended in the Final Order with the consent of Allelix and NPS, both
     acting reasonably;

     "Arrangement Resolution" mean the special resolution of the Allelix
     Shareholders concerning the Arrangement;

     "Articles of Arrangement" means the articles of arrangement in respect of
     the Arrangement required by the OBCA to be filed with the OBCA Director
     after the Final Order is made;

     "business day" means any day, other than Saturday, Sunday and a statutory
     holiday in Toronto, Ontario or Salt Lake City, Utah;

     "CBCA" means the Canada Business Corporations Act, as now in effect and as
     it may be amended from time to time prior to the Effective Date, including
     the regulations made thereunder;

     "Confidential Information" means all interpretations, technical, data,
     reports, notes, know how, computer printouts, information and documents (in
     each case whether in written or electronic form) pertaining in any way
     whatsoever to the business, operations or capital of a party hereto or its
     affiliates (as such term is defined in the Securities Act (Ontario)),
     disclosed or to be disclosed pursuant to the terms and conditions of this
     Agreement, and includes but is not limited to information relating to
     engineering, research and development, corporate operations, business
     opportunities, products, formulas, services, designs, drawings, marketing
     and financial and taxation matters;

     "Court" means the Superior Court of Justice (Ontario);

     "Delaware Act" means the Delaware Business Corporations Act, as amended;

     "Dissent Rights" has the meaning ascribed thereto in the Plan of
     Arrangement;

     "Effective Date" means the date shown on the certificate of arrangement to
     be issued by the Director;

     "Effective Time" has the meaning ascribed thereto in the Plan of
     Arrangement;

     "Encumbrance" includes, without limitation, any mortgage, pledge,
     assignment, charge, lien, or other security interest, or any trust or any
     preferential right of purchase or other third party interest and any
     agreement, option, right or privilege (whether by law, contract or
     otherwise) capable of becoming any of the foregoing;

     "Environmental Laws" means any applicable Canadian or foreign federal,
     provincial, state, municipal or local laws, regulations, orders, government
     decrees or ordinances with respect to environmental, health or safety
     matters;

                                      A-3
<PAGE>

     "Exchangeable Shares" means the exchangeable shares of NPS Allelix Inc.
     created pursuant to the Plan of Arrangement with the share attributes set
     forth in Appendix I to the Plan of Arrangement;

     "Final Order" means the order of the Court approving the Arrangement, as
     such order may be amended or modified by the highest court to which an
     appeal may be applied for at any time prior to the Effective Date or, if
     appealed, then, unless such appeal is withdrawn or denied, as granted or
     affirmed;

     "Information Circular" means the notice of meeting and management
     information circular of Allelix prepared in connection with the Allelix
     Meeting provided by Allelix to Allelix Shareholders in connection with the
     transactions contemplated by this Agreement;

     "Interim Order" means an order of the Court providing for, among other
     things, the calling and holding of the Allelix Meeting and certain other
     procedural matters, as well as for the issuance of the notice of
     application for the Final Order, as the same may be amended or supplemented
     from time to time;

     "Material Adverse Effect" and "Material Adverse Change" means, in relation
     to a party hereto, a condition affecting or a change in the business,
     assets, properties, condition (financial or otherwise), results of
     operations or prospects of such party (and its Subsidiaries on a
     consolidated basis) which when taken as a whole have or represent or could
     reasonably be expected to have a material adverse effect on the party or on
     the market price or value of its securities, other than any matter or
     action relating to (i) the Canadian economy or securities markets in
     general or (ii) relating to the Canadian or U.S. biotechnology industry in
     general, but not specifically relating to the party;

     "ME" means The Montreal Exchange;

     "Nasdaq" means the National Association of Securities Dealers Automated
     Quotation System;

     "NPS Allelix Inc." means a corporation to be incorporated under the Nova
     Scotia Companies Act as a wholly-owned subsidiary of NPS Holdings;

     "NPS Common Shares" means the common shares of NPS, par value $0.001 as
     constituted on the date hereof;

     "NPS Counsel" means Blake, Cassels & Graydon and/or such other counsel as
     may be appointed by NPS and James U. Jensen, Esq.;

     "NPS Holdings" means a corporation to be incorporated under the Nova Scotia
     Companies Act as a wholly-owned subsidiary of NPS;

     "NPS Information Circular" means the notice of meeting and management
     information circular of NPS prepared in connection with the NPS Meeting
     provided by

                                      A-4
<PAGE>

     NPS to NPS Securityholders in connection with the transactions contemplated
     by this Agreement;

     "NPS Meeting" means the special meeting of the holders of NPS Common Shares
     and all adjournments and postponements thereof to consider and, if
     determined advisable, approve, among other things,  (i) an amendment to
     NPS' Articles of Incorporation to increase the number of NPS Common Shares
     authorized for issuance thereunder; and (ii) the issuance of up to
     7,802,189 NPS Common Shares as contemplated by the Arrangement;

     "NPS Preferred Shares" means the NPS Preferred Stock, $0.001 par value, as
     constituted on the date hereof;

     "NPS Shareholder Rights Plan" means the Shareholder Rights Plan adopted by
     the NPS Board of Directors in December 1996;

     "NPS Stock Option Plans" means the 1987 Stock Option Plan, the 1994 Equity
     Incentive Plan, the 1994 Non-Employee Directors' Stock Option Plan, the
     1994 Non-Employee Director Stock Bonus Program, the Employee Stock Purchase
     Plan and the 1998 Stock Option Plan;

     "NPS Warrants" means the warrants to purchase NPS Common Shares issued from
     time to time prior to the date hereof;

     "OBCA" means the Business Corporations Act (Ontario), as now in effect and
     as it may be amended from time to time prior to the Effective Date,
     including the regulations made thereunder;

     "OBCA Director" means the Director appointed under Section 278 of the OBCA;

     "Person" means an individual, a partnership, a corporation, a trust, an
     unincorporated organization, a union, a government or any department or
     agency thereof and the heirs, executors, administrators or other legal
     representatives of an individual;

     "Plan of Arrangement" means the plan of arrangement which is annexed as
     Schedule A hereto and any amendment or variation thereto made in accordance
     with Section 9.1 of this Agreement;

     "Preferred Stock Purchase Rights" means the purchase rights issued pursuant
     to the NPS Shareholder Rights Plan;

     "Public Documents" means all documents filed, in the case of Allelix, by
     Allelix with the applicable securities regulatory authorities in all
     provinces in Canada in which Allelix is a reporting issuer, and in the case
     of NPS, by NPS with the United States Securities and Exchange Commission
     and Nasdaq, during the three years preceding the date of this Agreement,
     and includes all documents so filed to and including the Effective Date by
     a Person with respect to its business and affairs;

                                      A-5
<PAGE>

     "Subsidiary" means, with respect to (i) a specified body corporate, any
     body corporate of which more than 50% of the outstanding shares ordinarily
     entitled to elect a majority of the board of directors thereof (whether or
     not shares of any other class or classes shall or might be entitled to vote
     upon the happening of any event or contingency) are at the time owned
     directly or indirectly by such specified body corporate and shall include
     any body corporate in like relation to a Subsidiary, and (ii) any Person
     other than a corporation in which the first-mentioned Person or one or more
     of its subsidiaries, directly or indirectly, has at least a majority
     ownership and power to direct the policies, management and affairs thereof;

     "Support Agreement" means the agreement between NPS, NPS Holdings and NPS
     Allelix Inc., substantially in the form of Schedule B hereto;

     "Tax" and "Taxes" means, with respect to any entity, all income taxes
     (including any tax on or based upon net income, gross income, income as
     specially defined, earnings, profits or selected items of income, earnings
     or profits) and all capital taxes, paid-up capital taxes, gross receipts
     taxes, environmental taxes, sales taxes, use taxes, ad valorem taxes, value
     added taxes, transfer taxes, franchise taxes, licence taxes, withholding
     taxes, payroll taxes, employment taxes, Canada or Quebec Pension Plan
     premiums, excise, severance, social security premiums, workers'
     compensation premiums, unemployment insurance or compensation premiums,
     stamp taxes, occupation taxes, premium taxes, property taxes, windfall
     profits taxes, alternative or add-on minimum taxes, goods and services
     tax, customs duties or other taxes, fees, imports, assessments or charges
     of any kind whatsoever and any instalments in respect thereof, together
     with any interest and any penalties or additional amounts imposed by any
     taxing authority (domestic or foreign) on such entity and any interest,
     penalties, additional taxes and additions to tax imposed with respect to
     the foregoing.

     "Tax Return" and "Tax Returns" means all returns, declarations, reports,
     information returns and statements required to be filed with any taxing
     authority relating to Taxes;

     "TSE" means The Toronto Stock Exchange;

     "U.S. Securities Exchange Act" means the United States Securities Exchange
     Act of 1934, as amended;

     "Voting and Exchange Trust Agreement" means the agreement between NPS,
     NPS Allelix Inc. and a trust company, substantially in the form of
     Schedule C hereto.

1.2  Interpretation Not Affected by Headings

     The division of this Agreement into Articles, Sections, subsections and
paragraphs and the insertion of headings are for convenience of reference only
and shall not affect in any way the meaning or interpretation of this Agreement.

1.3  Article References

                                      A-6
<PAGE>

     Unless the contrary intention appears, references in this Agreement to an
Article, Section, subsection, paragraph or schedule by number or letter or both
refer to the Article, Section, subsection, paragraph or schedule, respectively,
bearing that designation in this Agreement.

1.4  Number and Gender

     In this Agreement, unless the contrary intention appears, words importing
the singular include the plural and vice versa; words importing gender shall
include all genders; and words importing persons shall include a natural person,
firm, trust, partnership, association, corporation, joint venture or government
(including any governmental board, agency or instrumentality thereof).

1.5  Date for Any Action

     If the date on which any action is required to be taken hereunder by any of
the parties is not a business day in the place where the action is required to
be taken, such action shall be required to be taken on the next succeeding day
which is a business day in such place.

1.6  Currency

     Unless otherwise stated, all references in this Agreement to sums of money
are expressed in lawful money of the United States of America.

1.7  Knowledge

     The use in this Agreement of the phrases "Allelix knowledge", "knowledge of
Allelix" and "known to Allelix", and similar phrases referring to "it" or "its"
in reference to the knowledge of Allelix with respect to any matter or thing,
shall be interpreted to mean the actual knowledge of the directors and senior
officers of Allelix after enquiry of the management or employees of Allelix who
have management responsibility over the area of Allelix's business to which the
subject matter of Allelix's actual knowledge relates, and the phrases "NPS
knowledge", "knowledge of NPS", and similar phrases referring to "it" or "its"
in reference to the knowledge of NPS or "known to NPS" with respect to any
matter or thing, have a corresponding meaning.

1.8  Disclosure

     The use in this Agreement of the phrase "except as disclosed" and similar
phrases, shall mean except as disclosed in writing by the disclosing party to
the receiving party (which shall include, without limitation, delivery of
documents for the purpose of disclosure of the contents thereof) and such
disclosure having been acknowledged in writing by the receiving party.

1.9  Schedules

                                      A-7
<PAGE>

     The following schedules are incorporated by reference into this Agreement
and form part hereof:

     Schedule A      -   Plan of Arrangement

     Schedule B      -   Support Agreement

     Schedule C      -   Voting and Exchange Trust Agreement

                                   ARTICLE 2
                                THE ARRANGEMENT

2.1  Arrangement

     As soon as reasonably practicable, Allelix and NPS shall apply to the Court
pursuant to Section 192 of the CBCA and Section 182 of the OBCA for an order
approving the Arrangement and in connection with such application shall:

     (a)  as soon as practicable and, in any event, by not later than October
          31, 1999, file, proceed with and diligently prosecute an application
          for an Interim Order under Section 192(4) of the CBCA and Section
          182(5) of the OBCA providing for, among other things, the calling and
          holding of the Allelix Meeting for the purpose of Allelix Shareholders
          considering and, if deemed advisable, approving the Arrangement
          Resolution; and

     (b)  subject to obtaining the approval of the Allelix Shareholders as
          contemplated in the Interim Order and as may be directed by the Court
          in the Interim Order, take the steps necessary to submit the
          Arrangement to the Court and apply for the Final Order;

and, subject to the fulfilment or waiver of the conditions set forth in Article
7, shall deliver to the Director the Articles of Arrangement and such other
documents as may be required to give effect to the Arrangement.

2.2  Interim Order

     The Interim Order sought by Allelix and NPS shall provide that, for the
purpose of the Allelix Meeting, the requisite majority for the approval of the
Arrangement Resolution by the holders of the Allelix Common Shares shall be two-
thirds of the votes cast by such shares present in person or by proxy at the
Allelix Meeting with holders of Allelix Preferred Shares entitled to vote as
holders of Allelix Common Shares in respect of that number of Allelix Common
Shares equal to the number of Allelix Common Shares such holders would be
entitled to receive if such shares were converted into Allelix Common Shares on
the record date for the Allelix Meeting unless the Court otherwise orders.

2.3  Effective Date

                                      A-8
<PAGE>

     The Arrangement shall become effective on the Effective Date.

                                   ARTICLE 3
                     MUTUAL REPRESENTATIONS AND WARRANTIES

     Each party to this Agreement represents and warrants to the other party and
acknowledges that such other party is relying upon such representations and
warranties in connection with the matters contemplated by this Agreement that:

3.1  Organization and Qualification

     It and each of its Subsidiaries is a corporation duly incorporated,
continued or amalgamated or a partnership formed, as the case may be, and
organized and validly existing under the laws of the jurisdiction of its
incorporation, continuance, amalgamation or formation and has the power and
authority to own or lease its property and assets and to carry on its business
as now being conducted and is duly registered to carry on business, and is in
good standing in each jurisdiction in which the character of its properties or
assets, owned or leased, or the nature of its business makes such registration
necessary, except where failure to be so registered or in good standing would
not have a Material Adverse Effect on it and its Subsidiaries, taken as a whole.

3.2  Subsidiaries

     It has no Subsidiaries or agreements of any nature to acquire any
Subsidiary, or to acquire any other business operations out of the ordinary
course of business except for, in the case of Allelix, the Allelix Subsidiaries.

3.3  Authority Relative to this Agreement

     It has the requisite corporate power and authority to enter into this
Agreement and, subject to obtaining the requisite approvals contemplated hereby,
to carry out its obligations hereunder.  The execution and delivery of this
Agreement and the consummation of the transactions contemplated hereby and in
the Plan of Arrangement have been duly authorized by its board of directors and,
except as contemplated hereby, no other corporate proceedings on behalf of it
are necessary to authorize this Agreement and the transactions contemplated
hereby.  This Agreement has been duly executed and delivered by it and
constitutes the legal, valid and binding obligation of it enforceable against it
in accordance with its terms, subject to enforceability being limited by
applicable bankruptcy, insolvency, reorganization and other laws affecting the
enforcement of creditors' rights generally and the discretionary nature of
certain remedies (including specific performance and injunctive relief) and
subject to the effectiveness of clauses providing rights of indemnity or
exculpating a party or persons from a liability or a duty otherwise owed which
may be limited by law.

3.4  No Violations Caused by Agreement or Arrangement

                                      A-9
<PAGE>

     (a)  Except as disclosed previously in writing to the other party making
          reference to this paragraph, the execution and delivery of this
          Agreement by it and the consummation of the transactions contemplated
          hereby and by the Plan of Arrangement and performance or compliance
          with the terms and provisions hereof and thereof, will not:

          (i)   subject to completion of the corporate proceedings contemplated
                hereby, violate, conflict with, or result in breach of any
                provision or, require any consent, approval or notice under, or
                constitute a default (or an event which, with notice or lapse of
                time or both, would constitute a default) or result in a right
                of termination, cancellation, purchase or acceleration under, or
                result in the creation of any Encumbrance upon any of the
                properties or assets of it or of any of its Subsidiaries under
                any of the terms, conditions or provisions of, its or its
                Subsidiaries, articles, bylaws or other constating documents,
                any agreement, contract, deed, indenture, debenture, note, bond,
                Encumbrance, license, permit, approval or other instrument,
                authority or obligation to which it or any of its Subsidiaries
                is a party, or to which any of them or any of their respective
                properties or assets may be subject, or by which it or any of
                its Subsidiaries is bound;

          (ii)  subject to compliance with the statutes and regulations referred
                to in Article 7, violate any Applicable Law, judicial or
                administrative judgment, ruling, order, writ, injunction,
                determination, award, decree, statute, ordinance, rule or
                regulation applicable and known to it or any of its Subsidiaries
                or any of their respective properties or assets; or

          (iii) cause the suspension or revocation of any authorization,
                consent, approval or license currently in effect,

          except for such violations, conflicts, breaches, defaults, rights or
          Encumbrances, suspensions, or revocations which, or any consents,
          approvals or notices which if not given or received, would not have
          any Material Adverse Effect; and

     (b)  no filing or registration with, or authorization, consent or approval
          of, any domestic or foreign public body or authority is necessary by
          it in connection with this Agreement, the Plan of Arrangement or the
          consummation of the transactions contemplated hereby or thereby,
          except as contemplated hereby and except for such filings or
          registrations which, if not made, or for such authorizations, consents
          or approvals, which, if not received, would not have any Material
          Adverse Effect.


3.5  No Outstanding Actions, Suits, Proceedings or Investigations

                                     A-10
<PAGE>

     Except as disclosed previously in writing to the other party making
reference to this paragraph, there are no actions, suits, proceedings or
investigations commenced or, to its knowledge, contemplated or threatened
against or affecting it or any of its Subsidiaries, at law or in equity, before
or by any governmental department, commission, board, bureau, court, agency,
arbitrator, stock exchange, market system or instrumentality, domestic or
foreign, of any kind, nor to the best of its knowledge are there any existing
facts or conditions which may reasonably be expected to be a proper basis for
any actions, suits, proceedings or investigations, which in any case could
prevent or hinder the consummation of the transactions contemplated hereby or
which could reasonably be expected to have a Material Adverse Effect.

3.6  Financial Statements

     The audited financial statements prepared in respect of its most recently
completed financial year for which such statements have been prepared and the
unaudited financial statements prepared in respect of the periods subsequent
thereto were prepared in accordance with applicable generally accepted
accounting principles consistently applied and fairly present the consolidated
financial position, consolidated profits and loss (in the case of Allelix),
results of operations and changes in the financial position of the corporations
to which they relate on a consolidated basis as of the dates and for the periods
indicated therein.

3.7  Minute Books and Unanimous Shareholder Agreement

     Its and its Subsidiaries' minute books are true and correct and contain the
minutes of all meetings and all resolutions of the shareholders and directors
thereof up to September 12, 1999 and, to its knowledge, there are no agreements
among its securityholders in relation to or concerning the voting, holding or
acquisition of its securities.

3.8  Public Disclosure

     Its Public Documents:

     (a)  did not, as of the respective dates thereof, contain any untrue
          statement of a material fact or omit to state any material fact
          required to be stated therein or necessary in order to make the
          statements made therein not misleading in light of the circumstances
          under which they were made; and

     (b)  complied in all material respects with all applicable requirements of
          Applicable Law, as of the respective dates thereof, and no fact exists
          on the date hereof which has not been disclosed in its Public
          Documents and which, if publicly disclosed, would reflect a Material
          Adverse Change (or an event, condition or state of facts which might
          reasonably have been expected to give rise to a Material Adverse
          Effect).

3.9  No Outstanding Defaults and Violations

                                     A-11
<PAGE>

     Neither it nor any of its Subsidiaries is:

     (a)  in breach or violation of any term or provision of its articles, by-
          laws or other constating documents; or

     (b)  in breach or violation of any of the terms or provisions of, or in
          default under, any indenture, mortgage, deed of trust, loan agreement
          or other agreement (written or oral) or instrument or agreement,
          contract, deed, indenture, debenture, note, bond, Encumbrance,
          research agreement, license, license agreement, permit, joint venture
          agreement, collaboration agreement, approval or other instrument,
          obligation or authority to which it or any of its Subsidiaries is a
          party or by which it or any of its Subsidiaries is bound or to which
          any of the properties or assets of it or any of its Subsidiaries is
          subject or, any statute or any Applicable Law order, rule or
          regulation of any court or government or governmental agency or
          authority having jurisdiction over it or any of its Subsidiaries or
          any of their respective properties or assets, where such breach,
          violation or default has or could reasonably be expected to have a
          Material Adverse Effect.

3.10 No Unusual Transactions or Events

     Except as previously disclosed in writing to the other party making
reference to this paragraph or as otherwise contemplated hereby, since, in the
case of Allelix, August 31, 1998 and, in the case of NPS, December 31, 1998, it
and each of its Subsidiaries has:

     (a)  not amended its articles, by-laws or other constating documents;

     (b)  conducted their respective businesses in all material respects in the
          ordinary course of business consistent with normal industry practice;

     (c)  maintained or obtained all licences, permits, orders or approvals of,
          and has made all required registrations with, any governmental or
          regulatory body that is material to the conduct of its business;

     (d)  not suffered any Material Adverse Change except as has been disclosed
          in its Public Documents;

     (e)  not made any change in its accounting principles and practices as
          theretofore applied including, without limitation, the basis upon
          which its assets and liabilities are recorded on its books and its
          earnings and profits and losses are ascertained;

     (f)  not suffered any damage, destruction or loss whether covered by
          insurance or not that could reasonably be expected to have a Material
          Adverse Effect;

     (g)  not sold or otherwise disposed of property or assets aggregating to
          10% or more of its total consolidated property and assets other than
          in the ordinary and regular course of business consistent with past
          practice;

                                     A-12
<PAGE>

     (h)  not entered into, amended, relinquished, terminated or not renewed any
          material contract, agreement, license, franchise, transaction,
          commitment or other right or obligation, other than in the ordinary
          and regular course of business consistent with past practice;

     (i)  maintained in effect salary and other compensation levels and benefits
          and employee rights on termination, in accordance with its then
          existing salary administration program;

     (j)  not declared, paid or set aside for payment any dividend or
          distribution of any kind in respect of any of its outstanding
          securities nor made any repayments of share capital; and

     (k)  not entered into or committed to enter into any agreement with an
          officer or director of the corporation or the beneficial owner of
          securities carrying more than 10% of the voting rights attached to all
          of its outstanding securities.

3.11 Tax and other Returns

     Except as previously disclosed in writing to the other party making
reference to this paragraph, it and each of its Subsidiaries has:

     (a)  duly and timely filed, in proper form, all Tax Returns required to be
          filed by them (all of which Tax Returns were correct and complete in
          all material respects) for all periods in respect of which such Tax
          Returns were due prior to the date hereof, and have paid in full all
          Taxes shown thereon, and there are no outstanding agreements or
          waivers extending the statutory period of limitations applicable to
          any return referred to above. There are no assessments or
          reassessments of Taxes that have been issued and are outstanding and
          there are no outstanding issues which have been raised and
          communicated to it by any taxing authority including any discussions
          in respect of potential assessments or reassessments; and

     (b)  withheld from each payment made to any of its officers, directors and
          employees and former officers, directors and employees and, where the
          party or its Subsidiary is resident or deemed to be resident in Canada
          for purposes of the Income Tax Act (Canada), to all persons who are
          non-residents of Canada, all amounts required to be withheld in
          respect of Taxes (including, without limitation, income tax) and
          remitted the same to the proper tax or other authority within the time
          required under any applicable legislation. All Taxes required under
          applicable legislation to be charged, collected and remitted on any
          sale, supply or delivery whatsoever, have been so charged, collected
          and remitted on a timely basis.

3.12 Tax Provisions

     Provision has been made, in accordance with applicable generally accepted
accounting principles, in its Financial Statements for all Taxes, payable in
respect of the business or assets of

                                     A-13
<PAGE>

it and its Subsidiaries or otherwise. Provision has also been made, in
accordance with generally accepted accounting principles, in their books and
records for all Taxes in respect of any accounting period which has ended
subsequent to the period covered by the Financial Statements.

3.13 Historical Assessments, Audits and Returns

     In respect of each taxation year of it and each of its Subsidiaries, and
the predecessors of such corporations, it has provided to the other party making
reference to this paragraph:

     (a)  full and complete disclosure with respect to the status of any audits;

     (b)  copies of all objections or waivers with respect to such years
          pursuant to applicable tax legislation, tax rulings and opinions from
          applicable taxing authorities pursuant to which it, its affiliates and
          any predecessors of such corporations operated or now operate; and

     (c)  copies of all Tax Returns which comprise all of the information
          necessary to form a reasonably accurate understanding of the current
          tax position of it and its Subsidiaries.

3.14 Assistance Filings

     All filings made by it and its Subsidiaries under which it or its
Subsidiaries has received or is entitled to government assistance or incentives
have been made in accordance, in all material respects, with all applicable
legislation and contain no misrepresentations of a material fact or omit to
state any material fact which could cause any amount previously paid or
previously accrued on its accounts to be recovered or disallowed.

3.15 Insurance

     It and its Subsidiaries maintain business and property insurance in
connection with their assets and business and liability insurance with respect
to claims for personal injury, death or property damage in relation to the
operation of their businesses, all with responsible and reputable insurance
companies in such amounts and with such deductibles as are customary in the case
of businesses of established reputation engaged in their industry.

3.16 Environmental Matters

     To its knowledge, except as disclosed in writing to the other party making
reference to this paragraph or except to the extent that such violation does not
have a Material Adverse Effect on it:

     (a)  it and each of its Subsidiaries is not in violation of any
          Environmental Laws;

     (b)  it and each of its Subsidiaries has operated its business at all times
          and has received, handled, used, stored, treated, shipped and disposed
          of all contaminants without violation of any Environmental Laws;

                                     A-14
<PAGE>

     (c)  there have been no unrectified spills, releases, deposits or
          discharges of hazardous or toxic substances, contaminants or wastes on
          any of the real property owned or leased by it or any of its
          Subsidiaries or under their respective control, nor has any such real
          property been used at any time by any person as a landfill or waste
          disposal site;

     (d)  there have been no releases, deposits or discharges, in violation of
          Environmental Laws, of any hazardous or toxic substances, contaminants
          or wastes to the earth, air or into any body of water or any municipal
          or other sewer or drain water system by it or any of its Subsidiaries;

     (e)  no orders, directions or notices have been issued and remain
          outstanding pursuant to Environmental Laws relating to its or any of
          its Subsidiaries, business or assets;

     (f)  neither it nor any of its Subsidiaries has failed to report to the
          proper governmental authority the occurrence of any event which is
          required to be so reported by any Environmental Laws; and

     (g)  it and each of its Subsidiaries, holds all licenses, permits and
          approvals required under Environmental Laws in connection with the
          operation of its business and the ownership and use of its assets, all
          such licenses, permits and approvals are in full force and effect, and
          neither it nor any of its Subsidiaries has received any notification
          pursuant to any Environmental Laws that any work, repairs,
          construction or capital expenditures are required to be made by it as
          a condition of continued compliance with any Environmental Laws, or
          any license, permit or approval issued pursuant thereto, or that any
          license, permit or approval referred to above is about to be reviewed,
          made subject to limitations or conditions, revoked, withdrawn or
          terminated.

3.17 Employment Agreements

     Except as previously disclosed in writing to the other party making
reference to this paragraph:

     (a)  neither it nor any of its Subsidiaries is a party to any written
          employment, service or pension agreement, whether written or oral,
          which cannot be terminated without cause by it or such Subsidiary, as
          the case may be, upon giving such notice as may be required by law (or
          paying to such Person such amount in lieu of notice) and without the
          payment of any damages or penalty;

     (b)  neither it nor any of its Subsidiaries is a party to or bound by any
          union or collective agreements nor currently engaged in labour
          negotiations. No grievance, application, complaint or other proceeding
          has been filed by or against it which is unresolved or outstanding.
          Neither it nor any of its Subsidiaries has engaged in any unfair
          labour practice;

                                     A-15
<PAGE>

     (c)  neither it nor any of its Subsidiaries is party to an employee benefit
          or pension plan or other benefit plan;

     (d)  no vacation pay, bonus, deferred compensation, profit sharing, pension
          or other similar obligation is owed to any employee.

3.18 Consents and Approvals

     No consent or approval is required to be obtained from, or notice required
to be delivered to, any government authority, other party to a contract or any
other person whose consent or approval is required to be obtained, or to which
notice is required to be delivered, in connection with the execution and
delivery of this Agreement and the completion of the transactions contemplated
hereby except:

     (a)  the approval of matters relating to the transactions contemplated
          hereby at the Allelix Meeting and the NPS Meeting;

     (b)  the approval of the Court of the transactions contemplated hereby;

     (c)  exemptions from the provincial securities regulators from the
          registration and prospectus requirements with respect to the
          exchangeable share structure;

     (d)  approval of the relevant Canadian stock exchange(s) regarding the
          conditional listing of the Exchangeable Shares;

     (e)  effectiveness of the registration statements filed with the U.S.
          Securities and Exchange Commission regarding the NPS Common Shares;

     (f)  approval of Nasdaq regarding the trading of the NPS Common Shares
          subject to notice of issuance;

     (g)  filing notice of the Arrangement pursuant to the Investment Canada
          Act;
except where failure to obtain such consent or approval would not constitute a
          Material Adverse Effect.

3.19 Brokers and Finders' Fees

     Except for the previously disclosed arrangements of Allelix with BancBoston
Robertson Stephens and of NPS with Prudential Vector, neither the execution of
this Agreement nor the consummation of the Plan of Arrangement will result in it
or any of its Subsidiaries having to pay any brokerage or finder's fee to any
person.

3.20 Intellectual Property Rights

     To the best of its knowledge, all intellectual property rights (including
patents, trade-marks, know how and trade secrets) (such rights being defined as
"Intellectual Property Rights")

                                     A-16
<PAGE>

owned by it or its Subsidiaries are valid, subsisting, unexpired, enforceable
and have not been abandoned and no claim has been made that the use of the
Intellectual Property Rights violates the rights of any third party. Except as
disclosed in writing to the other party making reference to this paragraph, none
of such Intellectual Property Rights have been licensed or franchised by the
Corporation to any party other than in the normal course of business.

                                   ARTICLE 4
                   REPRESENTATIONS AND WARRANTIES OF ALLELIX

     Allelix represents and warrants to NPS as follows, and acknowledges that
NPS is relying upon such representations and warranties in connection with the
matters contemplated by this Agreement:

4.1  Allelix Authorized Capital

     The authorized capital of Allelix consists of an unlimited number of common
shares and preferred shares issuable in series.

4.2  Allelix Issued Capital

     The issued and outstanding share capital of Allelix consists of 20,126,140
Allelix Common Shares and 1,000 Allelix Preferred Shares and, except for the
Allelix Options of which there are 1,596,321 outstanding and the Allelix
Warrants of which there are 829,108 outstanding, no other securities of Allelix
are issued and outstanding.  All outstanding Allelix Common Shares have been
duly authorized and validly issued, are fully paid and non-assessable and are
not subject to, nor were they issued in violation of, any preemptive rights.

4.3  Allelix Subsidiaries

     Allelix owns, except as disclosed in the notes to the Allelix Financial
Statements, directly or indirectly, all of the issued and outstanding shares of
all of its Subsidiaries, and all of the issued and outstanding shares in the
capital of each such Subsidiary as owned by Allelix are fully paid and non-
assessable and are legally and beneficially owned by Allelix free and clear of
any Encumbrances, voting trusts, proxies and other interests, claims or demands
of every kind or nature whatsoever other than the general security interest in
such shares granted by Allelix to a Canadian chartered bank pursuant to a
general security agreement, a copy of which has been provided to NPS by Allelix
and no person has any agreement, option, right or privilege (including, without
limitation, by law, pre-emptive right, contract or otherwise) to purchase,
convert into, exchange for or otherwise acquire, or any agreement, option, right
or privilege capable of becoming any such agreement, right, option or privilege,
any of the issued or unissued shares in the capital of the Subsidiary.

4.4  Allelix Options and Rights

     No person has any agreement, option, warrant or any right or privilege
(whether by law, preemptive right, contract or otherwise) capable of becoming an
agreement, option or right for

                                     A-17
<PAGE>

the purchase, subscription, allotment or issuance of any unissued securities of
Allelix or any Allelix Subsidiary, other than:

     (a)  1,596,321 Allelix Common Shares issuable on the exercise of the
          Allelix Options;

     (b)  829,108 Allelix Common Shares issuable on the exercise of the Allelix
          Warrants;

     (c)  not more than 875,773 Allelix Common Shares issuable upon the
          conversion of the Allelix Preferred Shares (assuming a floor price of
          Cdn.$3.36 and an exchange rate of U.S.$1.00 = Cdn.$1.4713, being the
          noon buying rate quoted in New York for cable transfers payable in
          Canadian dollars on September 27, 1999, certified by the Federal
          Reserve Bank of New York for customs purposes, as required by Section
          522 of the amended Tariff Act of 1930); and

     (d)  not more than 744,962 Allelix Common Shares issuable to Johnson &
          Johnson Development Corporation under a stock purchase agreement
          between dated October 30, 1998 (assuming a floor price of Cdn.$3.95
          and an exchange rate of U.S.$1.00 = Cdn.$1.4713, being the noon buying
          rate quoted in New York for cable transfers payable in Canadian
          dollars on September 27, 1999, certified by the Federal Reserve Bank
          of New York for customs purposes, as required by Section 522 of the
          amended Tariff Act of 1930).

4.5  Allelix Status Under Securities Laws

     Allelix is a reporting issuer under the securities laws of each province of
Canada and the issued and outstanding Allelix Common Shares and all issuable
Allelix Common Shares referred to in Section 4.4 are listed or listed subject to
issuance, as the case may be, on the TSE.  To its knowledge, Allelix is not in
default of any requirements of such securities laws, and, to its knowledge,
Allelix is in compliance with the by-laws, rules and regulations of the TSE.

4.6  Allelix Board Approval and Recommendation

     The Board of Directors of Allelix has unanimously determined that the
Arrangement is fair to the Allelix Shareholders and that the Arrangement is in
the best interests of Allelix and the Allelix Shareholders, approved the
Arrangement and the entering into and execution of this Agreement and resolved
to recommend that the Allelix Shareholders vote in favour of the Arrangement.


4.7  Information Circular

     The information contained in the Information Circular (other than
information solely relating to NPS which is to be provided by NPS to Allelix for
inclusion in the Information Circular) will contain no untrue statement of a
material fact and will not omit to state a material fact that is required to be
stated or that is necessary to make a statement not misleading in light of the
circumstances in which it is made.

                                     A-18
<PAGE>

4.8  Allelix Information in NPS Information Circular

     The information contained in the NPS Information Circular provided by
Allelix for inclusion in the NPS Information Circular will contain no untrue
statement of a material fact and will not omit to state a material fact that is
required to be stated or that is necessary to make a statement not misleading in
light of the circumstances in which it is made.

4.9  1999 Audited Statements

     Allelix represents and warrants that (i) the audited financial statements
to be prepared in respect of the financial year ended August 31, 1999 will be
prepared in accordance with generally accepted accounting principles
consistently applied and that such statements will fairly present the financial
position and results of operations and changes in the financial position of
Allelix on a consolidated basis as of the date of such statements and (ii) it
will not make any change in its accounting principles and practices previously
applied including, without limitation, the basis on which its assets and
liabilities are recorded on its books and its earnings and profits and losses
are ascertained.

                                   ARTICLE 5
                     REPRESENTATIONS AND WARRANTIES OF NPS

     NPS represents and warrants to Allelix as follows, and acknowledges that
Allelix is relying upon such representations and warranties in connection with
the matters contemplated by this Agreement:

5.1  NPS Authorized Capital

     The authorized capital of NPS consists of 20,000,000 NPS Common Shares and
5,000,000 NPS Preferred Shares.

5.2  NPS Issued Capital

     The issued and outstanding share capital of NPS consists of 12,710,724 NPS
Common Shares and, except for (a) the NPS Options, (b) the NPS Warrants, (c) the
NPS Preferred Share to be issued in connection with the transactions
contemplated hereby, and (d) the NPS Common Shares to be issued in connection
with the transactions contemplated hereby, no other securities of NPS are issued
and outstanding.  All outstanding NPS Common Shares have been duly authorized
and validly issued, are fully paid and non-assessable and are not subject to,
nor were they issued in violation of any preemptive rights.

5.3  NPS Options and Rights

     No person has any agreement or option or any right or privilege (whether by
law, preemptive right, contract or otherwise) capable of becoming an agreement,
option or right for the purchase, subscription, allotment or issuance of any
unissued securities of NPS other than

                                     A-19
<PAGE>

     (a) 2,161,954 Common Shares issuable on the exercise of the NPS Options;

     (b) 32,542 NPS Common Shares issuable on the exercise of the NPS Warrants;

     (c) up to 7,500,000 NPS Common Shares and the NPS Preferred Share, in each
         case, issuable under obligations to arise under the Exchangeable Shares
         or under the Plan of Arrangement; and

     (d) the securities issuable subsequent to the occurance of certain stated
         events pursuant to the terms of the Preferred Stock Purchase Rights.

5.4  NPS Status Under Securities Laws

     NPS is a reporting company under the U.S. Securities Exchange Act and the
issued and outstanding NPS Common Shares and the issuable NPS Common Shares
referred to in Section 5.3(a) are listed or listed subject to issuance,
respectively, on Nasdaq.  To its knowledge, NPS is not in default of any
requirements of such securities laws, and, to the best of its knowledge, NPS is
in compliance with the by-laws, rules and regulations of Nasdaq.

5.5  NPS Information in Information Circular

     The information contained in the Information Circular relating to NPS which
is provided by NPS to Allelix for inclusion in the Information Circular will
contain no untrue statement of a material fact and will not omit to state a
material fact that is required to be stated or that is necessary to make a
statement not misleading in light of the circumstances in which it is made.

5.6  NPS Information Circular

     The information contained in the NPS Information Circular (other than the
information solely relating to Allelix which is to be provided by Allelix to NPS
for inclusion in the NPS Information Circular) will contain no untrue statement
of a material fact and will not omit to state a material fact that is required
to be stated or that is necessary to make a statement not misleading in light of
the circumstances in which it is made.



5.7  NPS Board Approval

     The NPS Board of Directors has unanimously approved the Arrangement
Agreement and determined to recommend that the holders of NPS Common Shares vote
in favour of the matters contemplated in this Agreement to be voted on at the
NPS Meeting.

                                   ARTICLE 6
                                   COVENANTS


                                     A-20
<PAGE>

6.1  Mutual Covenants

     Each of the parties to this Agreement covenants to the other party that,
until the Effective Date or the day upon which this Agreement is terminated,
whichever is earlier, unless the other party shall otherwise agree in writing or
as otherwise expressly permitted or specifically contemplated by this Agreement,
it:

     (a)  will use all reasonable commercial efforts to satisfy (or to cause the
          satisfaction of) the conditions precedent to its obligations hereunder
          set forth in Article 7 to the extent the same is within its control
          and to take, or to cause to be taken, all other action and to do, or
          cause to be done, all other things necessary, proper or advisable
          under Applicable Laws to complete the Arrangement, including using all
          reasonable commercial efforts:

          (i)   to obtain all necessary waivers, consents and approvals required
                to be obtained by it from other parties to loan agreements,
                leases and other contracts;
          (ii)  to obtain all necessary consents, approvals and authorizations
                as are required to be obtained by it under Applicable Law; and
          (iii) to effect all necessary registrations and filings and
                submissions of information requested by governmental authorities
                required to be effected by it in connection with the
                Arrangement;

          and it will use its reasonable commercial efforts to cooperate with
          the other party to this Agreement in connection with the performance
          by it of its obligations hereunder including, without limitation,
          continuing to provide reasonable access to information and to maintain
          ongoing communications as between officers of Allelix and NPS;

     (b)  will make available and cause to be made available to the other party
          to this Agreement, its agents and advisors, all documents and
          agreements in any way relating to or affecting its business, financial
          condition, operations, prospects, properties, assets or affairs
          (including, without limitation, any such other documents or agreements
          as may be necessary or desirable to enable such other party to verify
          the truth of its representations and warranties and compliance by it
          with the terms and conditions hereof, except where it is contractually
          precluded from making such document or agreement available in which
          case it shall cooperate with the other party in securing access to any
          such documentation not in its possession or under its control;

     (c)  will not take any action, refrain from taking any action, or permit
          any action to be taken or not taken, inconsistent with this Agreement
          or which might, directly or indirectly, interfere with or adversely
          affect the consummation of the Arrangement; and

                                     A-21
<PAGE>

     (d)  will not, during the period commencing on the date of this Agreement
          and ending on the earlier of (i) the Effective Date and (ii) the
          second anniversary of the termination of this Agreement, directly or
          indirectly solicit, induce, recruit or encourage any of the other
          party's employees to terminate their employment with the other party
          or attempt to solicit, induce or recruit employees of the other party.
          The publication of advertisements in newspapers and/or other
          publication of general circulation (including trade publications and
          company websites) shall not in any event be deemed a violation of any
          provision of this Subsection.

6.2  Covenants of Allelix

     Allelix covenants and agrees that, until the Effective Date or the day upon
which this Agreement is terminated, whichever is earlier, it:

     (a)  will in a timely and expeditious manner and as soon as reasonably
          practicable, but in any event not later than October 31, 1999, file,
          proceed with and diligently prosecute an application to the Court
          under the CBCA and/or OBCA, as required, for an Interim Order with
          respect to the Arrangement;

     (b)  will, in a timely and expeditious manner and as soon as reasonably
          practicable:

         (i)   carry out the terms of the Interim Order;

         (ii)  prepare and file the Information Circular with the applicable
               securities regulatory authorities in all jurisdictions where the
               same is required to be filed and mail the same as ordered by the
               Interim Order and in accordance with Applicable Law, in all
               jurisdictions where the same is required, complying in all
               material respects with all applicable legal requirements on the
               date of mailing thereof;

         (iii) allow NPS and NPS Counsel to participate fully in preparation of
               the Information Circular and any amendments or supplements
               thereto;

         (iv)  convene the Allelix Meeting to be held on or before January 20,
               2000 and distribute copies of this Agreement (or a written
               summary thereof prepared by Allelix in form and substance
               reasonably satisfactory to NPS), in each case as ordered by the
               Interim Order;

         (v)   solicit proxies to be voted at the Allelix Meeting in favour of
               the Arrangement;

         (vi)  provide notice to NPS of the Allelix Meeting and allow NPS's
               representatives to attend the Allelix Meeting; and

         (vii) conduct the Allelix Meeting in accordance with the Interim Order,
               the by-laws of Allelix and any instrument governing such meeting,
               as applicable, and as otherwise required by law;

                                     A-22
<PAGE>

     (c) will, in a timely and expeditious manner and, in any event not later
         than October 20, 1999 deliver to NPS the audited financial statements
         prepared in respect of its fiscal year ended August 31, 1999 in
         accordance with Section 4.9;

     (d) will, in a timely and expeditious manner, prepare (and allow NPS and
         NPS Counsel to participate fully in such preparation) and file any
         amendments or supplements to the Information Circular with respect to
         the Allelix Meeting and mail the same as required by the Interim Order
         and in accordance with Applicable Law, in all jurisdictions where the
         same is required, complying in all material respects with all
         applicable disclosure and other legal requirements on the date of
         mailing thereof;

     (e) will, subject to the approval of the Arrangement at the Allelix Meeting
         in accordance with the provisions of the Interim Order, forthwith, but
         in any event not later than January 31, 2000, file, proceed with and
         diligently prosecute an application for the Final Order;

     (f) will forthwith carry out the terms of the Final Order and, subject to
         the receipt of the Final Order, will file Articles of Arrangement and
         the Final Order with the OBCA Director in order for the Arrangement to
         become effective on or before January 31, 2000;

     (g) will, subject to approval of the Continuance Resolution at the Allelix
         Meeting, file articles of continuance with the OBCA Director;

     (h) will, except for proxies and non-substantive communications with
         Securityholders, furnish promptly to NPS a copy of each notice, report,
         schedule or other document or communication delivered, filed or
         received by Allelix in connection with the Arrangement, the Allelix
         Meeting or any other meeting of Allelix Shareholders or class of
         security holders which all such holders, as the case may be, are
         entitled to attend, any filings under Applicable Law and any dealings
         with regulatory agencies in connection with, or in any way affecting,
         the transactions contemplated herein;

     (i) will make other necessary filings and applications under Applicable Law
         required on the part of Allelix in connection with the transactions
         contemplated herein and take all reasonable action necessary to be in
         compliance with such Applicable Law;

     (j) will make such filings and applications under Applicable Law as are
         required on the part of Allelix to exempt Allelix from the obligation
         to translate into the French language the materials delivered to
         Allelix Shareholders in connection with the Allelix Meeting;

                                     A-23
<PAGE>

     (k) will apply for the delisting of the Allelix Common Shares from the ME
         and allow NPS and NPS Counsel to participate in the preparation of the
         documentation required in this regard;

     (l) will conduct its affairs, and cause its Subsidiaries' affairs to be
         conducted, so that all of its representations and warranties contained
         herein shall be true and correct on and as of the Effective Date as if
         made thereon;

     (m) will use reasonable efforts, and cause its Subsidiaries to use
         reasonable efforts to preserve intact its business organization and
         goodwill, and to maintain satisfactory relationships with suppliers,
         distributors, customers, partners and others which have business
         relationships with it or its Subsidiaries;

     (n) shall conduct its business, and cause its Subsidiaries' businesses to
         be conducted, only in, not take any action except in, and maintain its
         respective properties and facilities in, the usual, ordinary and
         regular course of business and consistent with past practice;

     (o) except as may be necessary to give effect to the transactions
         contemplated hereby or with the prior written consent of NPS, shall
         not, nor will it permit its Subsidiaries to, directly or indirectly, do
         or permit to occur any of the following:

         (i)   issue, sell, pledge, lease, dispose of, encumber or agree to
               issue, sell, pledge, lease, dispose of or encumber, any
               additional shares of, or any options, warrants, calls, conversion
               privileges or rights of any kind to acquire any shares of any
               capital stock of Allelix (other than pursuant to the exercise of
               Allelix Options, Allelix Warrants or the conversion of the
               Allelix Preferred Shares in accordance with their terms);

         (ii)  enter into or assume any transaction or obligation or incur any
               capital expenditures, or enter into any series of related
               transactions or obligations or incur related capital
               expenditures, which, in the aggregate, exceed Cdn. $250,000,
               other than transactions, obligations and reasonable expenditures
               relating to:

               A.  the negotiation and preparation of this Agreement, including
                   the fulfilment by Allelix of the covenants contained in
                   Sections 6.2(a) through (j), inclusive;

               B.  responding to any unsolicited submission or proposal in
                   accordance with Section 6.3 or otherwise incurring expenses
                   at the direction of the Board of Directors of Allelix in
                   respect of matters for which such Board has received an
                   opinion of Allelix Counsel that such expenses are required to
                   be incurred to enable such directors to fulfil their
                   fiduciary duties as board members;

                                     A-24
<PAGE>

               C.  actions taken to preserve property or to safeguard
                   individuals from harm where such property or individuals are
                   in imminent danger of material damage or injury,

            provided that Allelix shall consult fully with NPS before taking any
            steps under this Section 6.2(o)(ii)(C) or, in the event of an
            emergency, as soon as practicable thereafter;

     (iii)  amend or propose to amend its articles or by-laws;

     (iv)   split, combine or reclassify any outstanding Allelix Common Shares,
            or declare, set aside or pay any dividend or other distribution
            payable in cash, stock, property or otherwise with respect to the
            Allelix Common Shares;

     (v)    redeem, purchase or offer to purchase any Allelix Common Shares or
            other securities of Allelix;

     (vi)   reorganize, amalgamate or merge Allelix with any other person,
            corporation, partnership or other business organization whatsoever;

     (vii)  reduce the stated capital of Allelix;

     (viii) acquire or agree to acquire (by merger, amalgamation, acquisition of
            securities or assets or otherwise) any corporation, partnership or
            other business organization or division or, except in the ordinary
            course of business, any assets or properties;

     (ix)   except as previously disclosed in writing to the other party making
            reference to this paragraph, incur or commit to incur any
            indebtedness for borrowed money or issue any debt securities except
            for the borrowing of working capital in the ordinary course of
            business and consistent with past practice; or

     (x)    enter into or agree to enter into any licence agreement,
            collaboration and/or development agreement or any other agreement to
            sell, convey, transfer, assign or encumber any of its right, title
            or interest in any of its research, pre-clinical or clinical
            development programs;

(p)  except for annual salary adjustments consistent with historic practice for
     Persons, other officers or management, shall not adopt or amend, nor will
     it permit its Subsidiaries to adopt or amend, any compensation
     arrangements, perquisites, profit sharing, incentive, compensation, stock
     option, pension, retirement, deferred compensation, employment or other
     employee benefit plan, agreement, trust, fund or arrangement for the
     benefit or welfare of any employee;

(q)  except with the prior written consent of NPS, will not permit any payments
     to be made under any profit sharing plan;

                                     A-25
<PAGE>

(r)  shall not take any action that would render any representation or warranty
     made by it in this agreement untrue at any time prior to the proposed
     transaction being consummated if then made;

(s)  shall promptly notify NPS orally and in writing of any governmental or
     third party complaints, investigations or hearings (or communications
     indicating that the same may be contemplated);

(t)  shall not enter into, modify or terminate any material contract, agreement,
     commitment or arrangement to which Allelix or a Subsidiary thereof is a
     party or by which its assets are bound;

(u)  will cause the auditors of Allelix to provide a comfort letter to NPS in
     respect of the Allelix financial statements and the information derived
     therefrom which is disclosed in the Information Circular and the NPS
     Information Circular;

(v)  will not, nor will it permit its Subsidiaries to, except for transactions
     in the ordinary course of business and as required in the course of prudent
     operations or with the prior written consent of NPS thereto, sell, dispose
     of, transfer, convey, surrender, release or abandon, or create or assume
     any Encumbrance on or in respect of, the whole or any part of its assets
     other than chattels that are replaced by equivalent property or consumed in
     operations and other than any liens arising as a result of operations under
     agreements affecting the assets;

(w)  will and will cause its Subsidiaries to use all reasonable commercial
     efforts to cause its current insurance (or re-insurance) policies not to be
     cancelled or terminated or any of the coverage thereunder to lapse, unless
     simultaneously with such termination, cancellation or lapse, replacement
     policies underwritten by insurance and re-insurance companies of nationally
     recognized standing providing coverage equal to or greater than the
     coverage under the cancelled, terminated or lapsed policies for
     substantially similar premiums are in full force and effect;

(x)  will, in all material respects, conduct itself so as to keep NPS reasonably
     informed as to its business and affairs and as to the decisions required
     with respect to the most advantageous methods of operating its business;

(y)  except with the prior written consent of NPS, will not, and will not permit
     its Subsidiaries to enter into any transaction out of the ordinary course
     of its business as hereinbefore conducted and will and will cause its
     Subsidiaries to use all reasonable efforts to preserve intact its present
     business, licenses and permits;

(z)  will not, and will not permit its Subsidiaries to, declare any dividends or
     make any other distribution or repay, other than the ordinary course of
     business, any outstanding indebtedness; and

(aa) will use all commercially reasonable efforts to obtain the written
     agreement of the holders of all of the Preferred Shares to vote in favour
     of the Arrangement

                                     A-26
<PAGE>

     Resolution and the Continuance Resolution in a form
     acceptable to NPS, acting reasonably, as soon as reasonably practicable.

6.3  No Soliciting Other Offers

     (a)  Without the prior written consent of NPS, from and after the date
          hereof, Allelix and its Subsidiaries will not, and will not authorize
          or permit any of their officers, directors, employees, financial
          advisors, representatives and agents ("Representatives") to, directly
          or indirectly, solicit, initiate or encourage (including by way of
          furnishing information) or take any other action to facilitate any
          enquiries or the making of any proposal which constitutes or may
          reasonably be expected to lead to an Acquisition Proposal (as defined
          herein) from any Person, or engage in any discussions or negotiations
          relating thereto or accept any Acquisition Proposal; provided,
          however, that notwithstanding any other provisions hereof, Allelix may
          at any time prior to the time the Allelix Shareholders shall have
          voted to approve the Arrangement and the other transactions
          contemplated thereby, engage in discussions or negotiations with a
          third party who (without any solicitation, initiation, or
          encouragement, directly or indirectly, by Allelix, any of its
          Subsidiaries or the Representatives after the date hereof) seeks to
          initiate such discussions or negotiations and may furnish such third
          party information concerning Allelix and its business, properties and
          assets if, and only to the extent that, (A) the third party has (x)
          first made an Acquisition Proposal that is financially superior to the
          transaction contemplated by this Agreement which, in any event, shall
          mean that such proposal shall offer a value per Allelix Common Share
          greater than the per share value attributable thereto under the
          transaction contemplated by this Agreement and (y) demonstrated that
          the funds or other consideration necessary for the Acquisition
          Proposal are reasonably likely to be available (as determined in good
          faith, in each case by Allelix's board of directors after receiving
          the advice of its financial advisors to this effect in writing or
          recorded in the minutes) (a "Superior Proposal") and Allelix's board
          of directors shall conclude in good faith, after considering
          Applicable Law and receiving the advice of outside counsel to this
          effect in writing or recorded in the minutes, that such action is
          necessary for the board of directors to act in a manner consistent
          with its fiduciary duties under Applicable Law, and (B) prior to
          furnishing such information to or entering into discussions or
          negotiations with such person or entity, Allelix provides prompt
          notice to NPS to the effect that it is furnishing information to or
          entering into discussions or negotiations with such person or entity
          and receives from such person or entity an executed confidentiality
          and restricted use agreement in reasonably customary form.

     (b)  Allelix shall immediately cease and terminate any existing
          solicitation, initiation, encouragement, activity, discussion or
          negotiation (including, without limitation, the closing of its present
          data room (if any)).

                                     A-27
<PAGE>

     (c)  Allelix shall notify NPS orally and in writing of any enquiries,
          offers or proposals with respect to an Acquisition Proposal (including
          without limitation terms and conditions of any such proposal, the
          identity of the person making it and all other information reasonably
          requested by NPS) within 12 hours of the receipt thereof, shall answer
          NPS' questions with respect to such enquiries, offers or proposals and
          shall give NPS five days advance notice of any agreement to be entered
          into with, or information to be supplied to, any person making such
          enquiry, offer or proposal.

     (d)  Allelix covenants that it will not enter into any agreement regarding
          a Superior Proposal (the "Proposed Agreement") without providing NPS
          with an opportunity to amend this Agreement to provide for a value per
          Allelix Common Share at least equal to that included in the Proposed
          Agreement (as determined in good faith by Allelix's Board of Directors
          after receiving the advice of its financial advisors to this effect in
          writing or recorded in the minutes). In particular, Allelix covenants
          to provide NPS with a copy of any Proposed Agreement as executed by
          the party making the proposal at least 72 hours prior to its proposed
          execution by Allelix. In the event that NPS agrees to amend this
          Agreement as provided above, Allelix covenants that it will not enter
          into the Proposed Agreement.

     (e)  As used herein, "Acquisition Proposal" shall mean a written proposal
          or offer by any person to acquire beneficial ownership of all or a
          material portion of the assets of Allelix (including shares of
          Subsidiaries) or one or more of its Subsidiaries or not less than 10%
          of the Allelix Common Shares or of one or more of its Subsidiaries
          pursuant to an amalgamation, plan of arrangement, consolidation or
          other business combination, sale of shares or other securities, sale
          of assets, take-over bid or tender offer or exchange offer or similar
          transaction involving Allelix or one or more of its Subsidiaries
          including, without limitation, any single or multi-step transaction or
          series of related transactions which is structured to permit such
          third party to acquire beneficial ownership or any material portion of
          the assets of, or such percentage of the Allelix Common Shares or one
          or more of its Subsidiaries (other than transactions contemplated by
          this Agreement).

6.4  Access

     NPS shall be entitled, on reasonable notice to Allelix during normal
business hours and without undue interference to Allelix's operations, to access
to Allelix's premises and will be entitled to meet with Allelix's shareholders,
creditors, licensors, licensees and employees.  Allelix will conduct itself, and
will cause its Subsidiaries to conduct themselves, so as to keep NPS fully
informed as to its and its Subsidiaries' business and affairs and as to the
decisions required with respect to the most advantageous methods of operating
and producing from its and its Subsidiaries' assets.

6.5  Covenants of NPS

                                     A-28
<PAGE>

     NPS covenants and agrees that, until the Effective Date or the day
upon which Agreement is terminated, whichever is earlier, it:

     (a)  will not issue NPS Common Shares at a price which is less than the
          then current market price on their date of issue less 10% except upon
          the exercise of the NPS Options;

     (b)  will allow Allelix and Allelix Counsel to participate fully in
          preparation of the NPS Information Circular and any amendments or
          supplements thereto;

     (c)  will, in a timely and expeditious manner and as soon as practicable
          but in any event not later than January 15, 2000, convene the NPS
          Meeting;

     (d)  solicit proxies to be voted at the NPS Meeting in favour of the
          matters to be considered thereat;

     (e)  provide notice to Allelix of the NPS Meeting and allow Allelix's
          representatives to attend the NPS Meeting;

     (f)  will, except for proxies and other non-substantive communications with
          Securityholders, furnish promptly to Allelix a copy of each notice,
          report, schedule or other document or communication delivered, filed
          or received by NPS in connection with the NPS Meeting and any dealings
          with regulatory agencies in connection therewith or in any way
          affecting the transaction contemplated hereby;

     (g)  file a registration statement with the Securities and Exchange
          Commission under the Securities Act covering registration of the NPS
          Common Shares issuable pursuant to the Arrangement and on the exchange
          of the Exchangeable Shares;

     (h)  will, in a timely and expeditious manner provide to Allelix all
          information as may be reasonably requested by Allelix or as required
          by the Interim Order or as may be required or desirable under
          Applicable Law with respect to NPS and its businesses and properties
          for inclusion in the Information Circular or in any amendments or
          supplements to the Information Circular complying in all material
          respects with all applicable legal requirements on the date of mailing
          thereof and not containing any misrepresentation (as defined under
          applicable securities laws) with respect thereto;

     (i)  will, to the extent within its power, forthwith carry out the terms of
          the Interim Order and the Final Order;

     (j)  will, to the extent within its power and subject to Applicable Laws,
          assist Allelix in the solicitation of proxies to be voted at the
          Allelix Meeting in favour of the Arrangement;

     (k)  will prepare and file with all applicable provincial securities
          commissions or similar securities regulatory authorities all necessary
          applications to seek exemptions, if required, from the prospectus,
          registration and other requirements

                                     A-29
<PAGE>

          of the applicable securities laws of such provinces for the issue by
          NPS of NPS Common Shares on exercise of the Exchangeable Shares and to
          permit resale of such shares in such provinces without the requirement
          to file a prospectus (other than by control persons and subject to
          general requirements other than a "hold period");

     (l)  will make all other necessary filings and applications under
          Applicable Laws required in connection with the transactions
          contemplated herein and take all reasonable action necessary to be in
          compliance with Applicable Laws and regulations;

     (m)  will use reasonable commercial efforts to conduct its affairs so that
          all of its representations and warranties contained herein shall be
          true and correct on and as of the Effective Date as if made thereon;

     (n)  will appoint on the Effective Date three Allelix directors to the
          Board of Directors of NPS mutually acceptable to Allelix and NPS,
          acting reasonably;

     (o)  will appoint, on the Effective Date, the individuals holding the
          positions of Senior Vice President and Chief Financial Officer and
          Senior Vice President, Operations of Allelix as officers of NPS with
          titles and duties commensurate with such positions acceptable to such
          individuals, Allelix and NPS, acting reasonably, upon terms and
          subject to conditions set out in employment agreements to be entered
          into between NPS and each such individual on the Effective Date;

     (p)  will conduct its affairs and cause its Subsidiaries' affairs to be
          conducted so that all of its representations and warranties contained
          herein shall be true and correct on and as of the Effective Date as if
          made thereon;

     (q)  shall not take any action that will render any representation or
          warranty made by it in this Agreement untrue at any time prior to the
          proposed transaction being consummated if then made;

     (r)  shall promptly notify Allelix orally and in writing of any government
          or third party complaints, investigations or hearings (or
          communications indicating that the same may be contemplated);

     (s)  shall, to the extent not then arranged by Allelix, as soon as
          reasonably practicable after the Effective Date, cause Allelix to
          provide an ongoing indemnity to the Persons serving as Allelix
          directors and officers immediately before the Effective Time in
          accordance with the OBCA and the Allelix by-laws and obtain a
          directors and officers insurance policy on substantially the same
          terms as to coverage, deductibles and other terms as Allelix' existing
          directors and officers insurance, for a period of 7 years after the
          Effective Date covering acts and omissions occurring before the
          Effective Date, provided that the insured has provided to NPS such
          information as NPS shall require acting reasonably and such

                                     A-30
<PAGE>

          information is not inconsistent with the representations given by
          Allelix pursuant hereto. Allelix shall hold this covenant in trust for
          Persons who are its directors and officers immediately before the
          Effective Time;

     (t)  shall, on the Effective Date, arrange for the listing of the NPS
          Common Shares on Nasdaq referred to in Section 5.3(c), which may be a
          standby listing for such Shares not issued immediately;

     (u)  will, in a timely and expeditious manner and as soon as reasonably
          practicable:

          (i)   prepare and file the NPS Information Circular with the
                applicable securities regulatory authorities in all
                jurisdictions where it is required to be filed and mailed in
                accordance with Applicable Law in all jurisdictions where it is
                required to be mailed complying in all material respects with
                all applicable legal requirements on the date of mailing; and

          (ii)  conduct the NPS Meeting in accordance with the NPS by-laws and
                any instrument governing the Meeting and otherwise in accordance
                with Applicable Law;

     (v)  will use reasonable efforts, and cause its Subsidiaries to use
          reasonable efforts, to preserve intact its business organization and
          goodwill and to maintain satisfactory relationships with suppliers,
          distributors, customers, partners and others which have business
          relationships with it or its Subsidiaries;

     (w)  shall conduct its business, and cause its Subsidiaries' businesses to
          be conducted, only in, not take any action except in, and maintain its
          respective properties and facilities in, the usual, ordinary and
          regular course of business and consistent with past practice;

     (x)  except as may be necessary to give effect to the transactions
          contemplated herein or with the prior written consent of Allelix,
          shall not, nor will it permit its Subsidiaries to, directly or
          indirectly, do or permit to occur any of the following:

          (i)   amend or propose to amend its charter documents;

          (ii)  split, combine or reclassify any outstanding NPS Common Shares
                or declare, set aside or pay any dividend or other distribution
                payable in cash, stock, property or otherwise with respect to
                the NPS Common Shares;

          (iii) redeem, purchase or offer to purchase any NPS Common Shares or
                other NPS securities;

          (iv)  reorganize, amalgamate or merge NPS with any other person,
                corporation, partnership or other business organization;

          (v)   reduce the stated capital of NPS;

                                     A-31
<PAGE>

          (vi)   acquire or agree to acquire (by acquisition of securities or
                 assets or otherwise) any corporation, partnership or other
                 business organization or division or any assets or properties
                 for consideration of more than $4,000,000 in total;

          (vii)  incur or commit to incur any indebtedness for borrowed money or
                 issue any debt securities except for the borrowing of working
                 capital in the ordinary course of business and consistent with
                 past practice; or

          (viii) enter into any agreement to sell, convey, transfer, assign or
                 encumber any of its right, title or interest in any of its
                 research, pre-clinical or clinical development programs having
                 a cost equal to more than 30% of the cost of all such programs;

     (y)  will cause the auditors of NPS to provide a comfort letter to Allelix
          in respect of the NPS financial statements and the information derived
          therefrom which is disclosed in the Information Circular and the NPS
          Information Circular;

     (z)  will and will cause its Subsidiaries to use all reasonable commercial
          efforts to cause its current insurance (or re-insurance) policies not
          to be cancelled or terminated or any of the coverage thereunder to
          lapse, unless simultaneously with such termination, cancellation or
          lapse, replacement policies underwritten by insurance and re-insurance
          companies of national recognized standing providing coverage equal to
          or greater than the coverage under the cancelled, terminated or lapsed
          policies for substantially similar premiums are in full force and
          effect;

     (aa) will not, and will not permit its Subsidiaries to, declare any
          dividends or make any other distribution or repay, other than in the
          ordinary course of business, any outstanding indebtedness; and

     (bb) except with the prior written consent of Allelix, will and will cause
          its Subsidiaries to use all reasonable efforts to preserve intact
          their present business, licenses and permits and will not, nor will it
          permit its Subsidiaries, to enter into any transaction out of the
          ordinary course of business as hereinbefore conducted if the total
          obligations and commitments of NPS and its Subsidiaries thereunder
          exceeds $4,000,000.

6.6  NPS No Shop

     Without the prior written consent of Allelix, from and after the date
hereof, NPS and its Subsidiaries will not, and will not authorize or permit any
of their officers, directors, employees, financial advisors, representatives and
agents ("Agents") to, directly or indirectly, solicit, initiate or encourage
(including by way of furnishing information) or take any other action to
facilitate any enquiries or the making of any proposal which constitutes or may
reasonably be expected to lead to an NPS Acquisition Proposal (as defined
herein) from any Person engaged in any discussions or negotiations relating
thereto or accept any Acquisition Proposal; provided,

                                     A-32
<PAGE>

however, that, notwithstanding any other provisions hereof, NPS may at any time
engage in discussions or negotiations with a third party who (without any
solicitation, initiation or encouragement, directly or indirectly, by NPS, any
of its Subsidiaries or any Agents after the date hereof) seeks to initiate such
discussions or negotiations and may furnish such third party information
concerning NPS and its business, properties and assets if the NPS board of
directors shall have concluded in good faith after considering Applicable Law
and receiving the advice of counsel in writing or as recorded in the NPS board
minutes to this effect, that such action is necessary for the board to act in a
manner consistent with its fiduciary duties. "NPS Acquisition Proposal" means a
written proposal or offer by any person to acquire not less than 20% of the NPS
Common Shares (excluding NPS Common Shares referred to in Section 5.3(a) and (b)
but including NPS Common Shares referred to in Section 5.3(c)) by business
combination, sale of issued or treasury shares or tender or exchange offer or
similar transaction including, without limitation, any single multi-step
transaction or series of related transactions which is structured to permit the
Person to acquire such NPS Common Shares. For certainty, NPS's obligations under
this Section 6.6 shall terminate on the earlier of the Effective Date and the
termination of this Agreement for any reason whatsoever.

                                   ARTICLE 7
                                  CONDITIONS

7.1  Mutual Conditions

     The obligations of Allelix and NPS to complete the transactions
contemplated hereby are subject to fulfilment of the following conditions on or
before the Effective Date or such other time as is specified below:

     (a)  the Interim Order shall have been granted in form and substance
          satisfactory to Allelix and NPS, acting reasonably, on or before
          October 31, 1999 and shall not have been set aside or modified in a
          manner unacceptable to such parties on appeal or otherwise;

     (b)  the Arrangement Resolution shall have been duly approved by the
          required majority, with or without amendment, in accordance with the
          Interim Order, on or before January 20, 2000;

     (c)  each of the resolutions considered at the NPS Meeting shall have been
          duly approved by the required majority without amendment on or before
          January 20, 2000;

     (d)  Allelix shall have obtained articles of continuance from the OBCA
          Director in form and substance satisfactory to Allelix and NPS, acting
          reasonably;

     (e)  the Final Order shall have been granted in form and substance
          satisfactory to Allelix and NPS, acting reasonably, on or before
          January 31, 2000, and shall not have been set aside or modified in a
          manner unacceptable to such parties on appeal or otherwise;

                                     A-33
<PAGE>

     (f)  the Articles of Arrangement relating to the Arrangement shall be in
          form and substance satisfactory to Allelix and NPS, acting reasonably;

     (g)  the Effective Date shall be on or before January 31, 2000;

     (h)  (i) no act, action, suit or proceeding shall have been taken or be
          outstanding before or by any domestic or foreign court or tribunal or
          governmental agency or other regulatory authority or administrative
          agency or commission by any elected or appointed public official or
          private person (including, without limitation, any individual,
          corporation, firm, group or other entity) in Canada or elsewhere,
          whether or not having the force of law; and (ii) no law, regulation or
          policy shall have been proposed, enacted, promulgated or applied
          which, in either case, has effect, or may have effect, to cease trade,
          enjoin, or prohibit the acquisition by NPS of the Allelix Common
          Shares, or the right of NPS to own or exercise full rights of
          ownership of the Allelix Common Shares, or the issuance, pursuant to
          the Arrangement, of NPS Common Shares and Exchangeable Shares to the
          Allelix Shareholders;

     (i)  there shall not exist any prohibition at law against NPS or Allelix
          and Allelix Shareholders consummating the Arrangement;

     (j)  Allelix and NPS shall have obtained the consents, approvals and
          authorizations referred to in Section 3.18 and such other material
          consents, approvals and authorizations (if any), regulatory or
          otherwise, required or necessary in connection with the transactions
          contemplated herein on terms and conditions satisfactory to each of
          them, acting reasonably:

     (k)  the Exchangeable Shares issuable pursuant to the Arrangement shall
          have been conditionally approved for listing on the TSE subject to the
          filing of the usual and customary documentation;

     (l)  any required orders from applicable securities authorities authorizing
          the issue of the Exchangeable Shares shall have been obtained on terms
          satisfactory to NPS and Allelix, both acting reasonably;

     (m)  there shall not have occurred any actual or threatened change
          (including a proposal by the Minister of Finance of Canada to amend
          the Income Tax Act (Canada) or any announcement, governmental or
          regulatory initiative, condition, event or development involving a
          change or a prospective change) that, in the judgment of NPS, acting
          reasonably, directly or indirectly, has or may have a Material Adverse
          Effect with respect to consummating the proposed transaction; and

     (n)  holders of not more than 10% of Allelix's Common Shares shall have
          exercised Dissent Rights.

                                     A-34
<PAGE>

     The foregoing conditions are for the mutual benefit of Allelix and NPS and
may be waived, in whole or in part, by each of Allelix and NPS acting
individually for its own interest at any time. If any of the said conditions
precedent shall not be complied with or waived as aforesaid on or before the
date required for the performance thereof, either Allelix or NPS may, in
addition to the other remedies it may have at law or in equity, rescind and
terminate this Agreement by written notice to the other party.

7.2  Allelix Conditions

     The obligation of Allelix to complete the transactions contemplated herein
is subject to the fulfilment of the following conditions on or before the
Effective Date or such other time as is specified below:

     (a)  the representations and warranties made by NPS in this Agreement shall
          be true as of the Effective Date as if made on and as of such date and
          NPS shall have provided to Allelix the certificate of one senior
          officer of NPS certifying such accuracy on the Effective Date (and
          Allelix shall have no knowledge to the contrary);

     (b)  NPS shall have provided Allelix with opinions of NPS Counsel (which,
          except for the opinion referred to in Section 7.2(b)(viii), may be the
          opinion of NPS' Vice President, Corporate Development and Legal
          Affairs) in form and substance satisfactory to Allelix, acting
          reasonably, dated the Effective Date (or such other date as Allelix
          and NPS may agree) and addressed to Allelix and Allelix Counsel to the
          effect that:

          (i)   NPS is duly incorporated and validly existing under the laws of
                the jurisdiction of its incorporation and has the corporate
                power and authority to carry on any business now conducted by
                it;

          (ii)  NPS has full corporate power and authority to enter into this
                Agreement and to perform its obligations hereunder;

          (iii) all necessary proceedings, corporate, regulatory or otherwise,
                of NPS have been taken to fully, validly and effectively
                authorize this Agreement and the transactions contemplated
                herein including the Arrangement, the performance by NPS of its
                obligations hereunder, and the execution and delivery by NPS of
                this Agreement and all documents delivered pursuant hereto;

          (iv)  each NPS Common Share to be issued under the Arrangement will be
                authorized and reserved for issuance and, when so issued, will
                be validly issued and outstanding as a fully paid and non-
                assessable share in the capital of NPS;

          (v)   the NPS Common Shares to be issued on exchange of an
                Exchangeable Share shall be immediately tradable upon Nasdaq;

                                     A-35
<PAGE>

          (vi)   the execution and delivery by NPS of this Agreement and all
                 documents delivered pursuant hereto, the performance by NPS of
                 its obligations hereunder and thereunder and the consummation
                 of the transactions contemplated herein and therein will not
                 result in the breach of or violate any term or provision of the
                 articles or by-laws of NPS;

          (vii)  this Agreement has been duly executed and delivered by NPS and
                 this Agreement and all agreements delivered pursuant to the
                 terms hereof are valid and binding obligations of NPS
                 enforceable against it in accordance with their respective
                 terms, subject to enforceability being limited by applicable
                 bankruptcy, insolvency, reorganization and other laws affecting
                 creditors' rights generally and the discretionary nature of
                 certain remedies (including specific performance and injunctive
                 relief) and subject to the effectiveness of clauses providing
                 rights of indemnity or exculpating a party or persons from a
                 liability or a duty otherwise owed which may be limited by law;
                 and

          (viii) the issuance of NPS Common Shares on exchange of an
                 Exchangeable Share is exempt from the prospectus and
                 registration requirements of the applicable securities laws in
                 each applicable province and no filing, proceeding, consent or
                 approval is required under such applicable law in connection
                 with the issuance of such NPS Common Shares; and that the NPS
                 Common Shares acquired on exchange of an Exchangeable Share
                 will not be subject to restrictions on their resale in such
                 provinces, other than trades from a control block and excluding
                 any outstanding escrow agreements,

          and in giving such opinion, NPS Counsel may rely in respect of matters
          of fact, upon certificates of senior officers of NPS or any other
          appropriate persons; and in respect of matters governed by the laws of
          any jurisdiction other than Delaware and Utah, NPS Counsel may deliver
          the opinion of local counsel in such other jurisdiction;

    (c)   the appointment of three Allelix directors, to be jointly designated
          by NPS and Allelix, acting reasonably, to the board of directors of
          NPS;

    (d)   NPS shall have complied with its covenants herein and shall have
          provided to Allelix the certificate of a senior officer of NPS
          certifying that NPS has complied with its respective covenants herein
          and Allelix shall have no knowledge to the contrary;

    (e)   between the date of the most recent public disclosure by NPS and the
          Effective Date, there shall not have occurred any Material Adverse
          Change with respect to NPS that is not attributable to a Material
          Adverse Change with respect to Allelix;

                                     A-36
<PAGE>

    (f)   NPS, NPS Holdings and NPS - Allelix Inc. shall have entered into the
          Support Agreement; and

    (g)   NPS, NPS Allelix Inc. and a trust company acceptable to NPS and
          Allelix, acting reasonably, shall have entered into the Voting and
          Exchange Trust Agreement.

     The foregoing conditions precedent are for the benefit of Allelix and may
be waived, in whole or in part, by Allelix in writing at any time.  If any of
the conditions shall not be complied with or waived by Allelix on or before the
date required for their performance then Allelix may, in addition to the other
remedies it may have at law or equity, rescind and terminate this Agreement by
written notice to NPS.

7.3  NPS Conditions

     The obligation of NPS to complete the transactions contemplated herein is
subject to fulfilment of the following conditions on or before the Effective
Date or such other time as specified below:

     (a)  the representations and warranties made by Allelix in this Agreement
          shall be true as of the Effective Date as if made on and as of such
          date and Allelix shall have provided to NPS a certificate of the
          Chairman of the Board of Allelix and the Chief Executive Officer (or
          such other officer of Allelix that may be acceptable to NPS, acting
          reasonably) certifying such accuracy on the Effective Date (and NPS
          shall have no knowledge to the contrary);

    (b)   Allelix shall have provided NPS with an opinion of Allelix Counsel in
          form and substance satisfactory to NPS, acting reasonably dated the
          Effective Date (or such other date as Allelix and NPS may agree) and
          addressed to NPS and NPS Counsel to the effect that:

          (i)   Allelix and each of its material Subsidiaries are duly
                incorporated, amalgamated, continued or formed and existing
                under the laws of the jurisdiction of their respective
                incorporation or formation, as the case may be, and each has the
                power and authority to carry on any business now conducted by
                it;

          (ii)  Allelix has full corporate power and authority to enter into
                this Agreement and to perform its obligations hereunder;

          (iii) all necessary proceedings, corporate, regulatory or otherwise,
                of Allelix have been taken to fully, validly and effectively
                authorize this Agreement and the transactions contemplated
                herein including the Arrangement, the performance by Allelix of
                its obligations hereunder, and the execution and delivery by
                Allelix of this Agreement and all documents delivered pursuant
                hereto;

                                     A-37
<PAGE>

          (iv)  the execution and delivery by Allelix of this Agreement and all
                agreements delivered pursuant hereto, the performance by Allelix
                of its obligations hereunder and thereunder and the consummation
                of the transactions contemplated herein and therein will not
                result in the breach of or violate any term or provision of the
                articles or by-laws of Allelix; and

          (v)   this Agreement has been duly executed and delivered by Allelix
                and this Agreement and all agreements delivered pursuant to the
                terms hereof are valid and binding obligations of Allelix
                enforceable against it in accordance with their respective
                terms, subject to enforceability being limited by applicable
                bankruptcy, insolvency, reorganization and other laws affecting
                creditors' rights generally and the discretionary nature of
                certain remedies (including specific performance and injunctive
                relief) and subject to the effectiveness of clauses providing
                rights of indemnity or exculpating a party or persons from a
                liability or a duty otherwise owed which may be limited by law,

          and in giving such opinion, Allelix Counsel may rely, in respect of
          matters of fact, upon certificates of senior officers of Allelix or
          any other appropriate persons; and in respect of matters governed by
          the laws of any jurisdiction other than Ontario, Quebec, Alberta,
          British Columbia or the laws of Canada applicable therein, Allelix
          Counsel may deliver the opinion of local counsel in such other
          jurisdiction;

     (c)  Allelix shall have complied, in all material respects, with its
          covenants herein and Allelix shall have provided to NPS a certificate
          of the Chairman of the Board of Allelix and the Chief Executive
          Officer (or such other officer of Allelix that may be acceptable to
          NPS, acting reasonably) certifying that Allelix has complied with its
          covenants herein and NPS shall have no knowledge to the contrary;

     (d)  the Interim Order, the Final Order and any required orders from the
          applicable Securities Commissions authorizing the issuance of the
          Exchangeable Shares shall have been obtained on terms satisfactory to
          NPS, acting reasonably;

     (e)  between the date of the most recent public disclosure by Allelix, and
          the Effective Date, there shall not have occurred any Material Adverse
          Change with respect to Allelix;

     (f)  the directors of Allelix and its Subsidiaries shall have tendered
          their resignations to be effective on the Effective Date.

     The foregoing conditions precedent are for the benefit of NPS and may be
waived in whole or in part by NPS in writing at any time. If any of the said
conditions shall not be complied with or waived by NPS on or before the date
required for the performance thereof, NPS may, in addition to the other remedies
it may have at law or equity, rescind and terminate this Agreement by written
notice to Allelix.

                                     A-38
<PAGE>

                                   ARTICLE 8
                               FEES AND EXPENSES


8.1  Topping Fee

     In the event that:

     (a)  Allelix breaches its covenants or agreements in this Agreement in any
          material respect;

     (b)  NPS terminates this Agreement pursuant to Section 11.2(b); unless (i)
          the Board of Directors of Allelix shall have withdrawn or varied in a
          manner determined by NPS to be adverse to NPS its approval of this
          Agreement or the Arrangement or its unanimous recommendation to the
          Allelix Shareholders because of a Material Adverse Change affecting
          NPS and (ii) that such change is not attributable to a Material
          Adverse Change affecting Allelix;

     (c)  Allelix terminates this Agreement pursuant to Section 11.2(d);

     (d)  (i) an Acquisition Proposal (provided that for the purposes of this
          Section 8.1(d), the reference to 10% of the Allelix Common Shares in
          the definition of "Acquisition Proposal" in Section 6.3(c) shall be
          deemed to be a reference to 20% of the Allelix Common Shares) is
          announced or made and is not withdrawn more than two business days
          prior to the date of the Allelix Meeting , (ii) the Allelix
          Shareholders do not approve the Arrangement at the Allelix Meeting;
          and (iii) a transaction involving the acquisition of a material
          portion of the assets of Allelix or one or more of its Subsidiaries or
          Allelix Common Shares so as to hold not less than 20% or more of the
          Allelix Common Shares outstanding shall be completed with the Person
          that made or announced the Acquisition Proposal or an affiliate of
          such Person within the 12 months following the date of the Allelix
          Meeting;

Allellix will pay NPS a fee of $2,000,000 in immediately available funds to an
account designated by NPS within one business day following receipt of notice
from NPS of particulars concerning such account.

8.2  Payment of Expenses

     If the Allelix Shareholders shall fail to approve the Arrangement at the
Allelix Meeting except following a Material Adverse Change affecting NPS, then
on the first business day following the Allelix Meeting subject to receipt of
the documentation described below, Allelix shall reimburse NPS for out-of-pocket
cost and expenses in connection with the transaction contemplated by this
Agreement (against a copy of such documentation therefor as Allelix, acting
reasonably, may request) to a maximum of $500,000.

8.3  NPS Break Fee


                                     A-39
<PAGE>

     In the event that:

     (a)  NPS breaches a covenant or agreement on its part in this
          Agreement in any material respect; or

     (b)  the holders of the NPS Common Shares do not approve the matters
          relating to the Arrangement considered at the NPS Meeting except
          following a Material Adverse Change affecting Allelix;

NPS will pay to Allelix a fee of $1,000,000 in immediately available funds to an
account designated by Allelix within one business day following receipt of
notice from Allelix of particulars concerning such account, provided that the
amount of such fee shall be increased to $2,000,000 in the event that the NPS
Board of Directors shall have withdrawn or varied in a manner determined by
Allelix to be adverse to Allelix their unanimous recommendation to holders of
NPS Common Shares, otherwise than because of a Material Adverse Change affecting
Allelix.



                                   ARTICLE 9
                                   AMENDMENT

9.1  Amendment

     This Agreement may, at any time and from time to time before or after the
holding of the Allelix Meeting, be amended by written agreement of the parties
hereto without further notice to or authorization on the part of their
respective shareholders, and any such amendment may, without limitation:

     (a)  change the time for performance of any of the obligations or acts of
          the parties hereto;

     (b)  waive any inaccuracies or modify any representation contained herein
          or in any document delivered pursuant hereto;

     (c)  waive compliance with or modify any of the covenants herein contained
          and waive or modify performance of any of the obligations of the
          parties hereto; and

     (d)  waive compliance with or modify any conditions precedent herein
          contained;

provided that, notwithstanding the foregoing, the number of Exchangeable Share
which the holders of Allelix Common Shares shall have the right to receive on
the Arrangement may not be reduced without the approval of the Allelix
Shareholders given in the same manner as required for the approval of the
Arrangement or as may be ordered by the Court.

                                     A-40
<PAGE>

9.2    Mutual Understanding Regarding Amendments

       (a)  The parties will continue, from and after the date hereof and
            through and including the Effective Date, to use their respective
            reasonable efforts to maximize present and future financial and tax
            planning opportunities for the holders of Allelix securities, and
            for NPS and for Allelix as and to the extent that the same shall not
            prejudice any party or its security holders. The parties will ensure
            that such planning activities do not impede the progress of the
            Arrangement in any material way.

       (b)  The parties agree that if either party shall propose any amendment
            or amendments to this Agreement or to the Plan of Arrangement, the
            other will act reasonably in considering such amendment and if the
            other and its shareholders are not prejudiced by reason of any such
            amendment the other will co-operate in a reasonable fashion with the
            other party, so that such amendment can be effected subject to
            Applicable Law and the rights of the security holders.

                                  ARTICLE 10
                        CONFIDENTIALITY AND STANDSTILL

10.1   Confidentiality

       Each of NPS and Allelix acknowledges and agrees that it will not use
Confidential Information for any purpose whatsoever other than for purposes
specifically relating to evaluation of the proposed transaction, and that any
Confidential Information provided to a party hereto (the "receiving party") in
written form shall be returned to the party supplying the same (the "supplier")
forthwith upon this Agreement being terminated and for greater certainty, it is
understood and agreed by each of the receiving parties that no written
materials, reproductions, extracts, typed or hand written notes or memorandums
made from, or relating in any way to, the Confidential Information shall be
retained by such parties after the termination of this Agreement and forthwith
upon any such occurrence, all such materials, extracts, notes and memorandums
shall be destroyed unless returned to the supplier as aforesaid, and the
receiving party shall, forthwith upon the request of the supplier, provide a
statutory declaration as to that fact, from an officer.

       The receiving party hereby undertakes and agrees with the supplier that
such receiving party shall keep such Confidential Information in strict
confidence, and shall not disclose any such Confidential Information to any
third party or parties whatsoever except in strict accordance herewith.
Disclosure of the Confidential Information may be made by or on behalf of the
receiving party to its employees and professional advisors who have a need to
know such Confidential Information for purposes of considering the making of a
bona fide evaluation of the proposed transaction, provided that all such persons
agree to keep such information confidential and to be bound by this Agreement to
the same extent as if they were parties hereto.  Disclosure of the Confidential
Information may be made by or on behalf of the receiving party, or any other
party to whom disclosure has been made in accordance herewith, if required by
law, provided however, that forthwith upon receipt of any such request or order
for such disclosure, the

                                     A-41
<PAGE>

receiving party or such other party to whom the request for disclosure is made,
shall forthwith notify the supplier that a request has been made for disclosure
in order that the supplier may seek any appropriate protective order or waive
compliance by the receiving party with the provision of this Agreement. The
receiving party further agrees that, if in the absence of a protective order or
the receipt of a waiver from the supplier, the receiving party is nonetheless,
in the reasonable opinion of its counsel, compelled to disclose any Confidential
Information to any tribunal or else stand liable for contempt or suffer other
censure or penalty, the receiving party may disclose only that portion of the
Confidential Information that it is legally required to so disclose to such
tribunal without liability hereunder.

       The restrictions on the use and disclosure of the Confidential
Information set forth in this Agreement shall not apply if:

       (a)  the Confidential Information is or becomes publicly available other
            than through a breach of this Agreement by either party to whom
            disclosure is made in accordance herewith;

       (b)  the Confidential Information is subsequently lawfully obtained
            without secrecy obligation from a third party or parties not in a
            contractual or fiduciary relationship with any member of the
            receiving party, other than through a breach of this Agreement,
            provided that written supporting documentation confirming the lawful
            authority of such third party or parties to disclose the
            Confidential Information is provided to the supplier;

       (c)  the Confidential Information was known by the receiving party or
            other parties prior to the time at which disclosure of such
            Confidential Information was made to the receiving party or such
            other parties in accordance herewith, provided that written
            supporting documentation confirming that fact is provided to the
            supplier; or

       (d)  the written consent of the supplier is given prior to any such use
            or disclosure being made.

       Each party agrees that it would be difficult to measure the damage to the
other party from the breach of such party's obligations under this Section 10.1,
that injury to the other party from any such breach would be impossible to
calculate, and that monetary damages would therefore be an inadequate remedy;
accordingly, each party agrees that the other party shall be entitled, in
addition to all other remedies it might have, to injunctions or other
appropriate orders to restrain any such breach without showing or providing any
actual damage or posting any bond or other security in connection with such
remedy.

10.2   Standstill

       Each of NPS and Allelix hereby agrees that, unless an offer to acquire
beneficial ownership of all or a material portion of the assets of the other
party (including shares of Subsidiaries) or one or more of its Subsidiaries or
not less than 20% of the common shares of the

                                     A-42
<PAGE>

other party pursuant to a transaction to be considered at a meeting of security
holders requisitioned by a security holder of such other party or pursuant to a
take over bid, tender offer, exchange offer or similar transaction involving the
other party, is made and not withdrawn at the time the conduct otherwise
prohibited by this Section 10.2 has commenced (whether during the term of this
Agreement or thereafter), neither it nor any affiliate of it (regardless of
whether an affiliate on the date hereof) will, prior to June 27, 2000, without
the prior written consent of the other party:

       (a)  acquire, offer to acquire or agree to acquire, directly or
            indirectly, by purchase or otherwise, individually or jointly or in
            concert with any other person (as that expression is used in the
            Securities Act (Ontario) any voting securities, or securities
            convertible into or exchangeable for voting securities, of the other
            party; or

       (b)  directly or indirectly make, or in any way participate in, any
            solicitation of proxies to vote, or seek to advise or influence any
            other person with respect to the voting of any voting securities of
            the other party; or

       (c)  form, join or in any way participate in a "group" within the meaning
            of Section 13(d)(3) of the United States Securities Exchange Act of
            1934, as amended, with respect to any voting securities of the other
            party; or

       (d)  otherwise act alone or in concert with others to seek to control the
            management, directors or corporate policies of the other party; or

       (e)  engage in any discussions or negotiations, enter into any agreement
            or submit a proposal for, or offer (with or without condition) any
            business combination or extraordinary transaction involving the
            other party or any affiliate of the other party or any of their
            respective securities or assets; or

       (f)  make any public announcement of any intention to do or take any of
            the foregoing.

                                  ARTICLE 11
                                    GENERAL

11.1   Expenses

       Except as provided for in Article 8 hereof, each party hereto covenants
and agrees to bear its own costs and expenses in connection with the
transactions contemplated hereby.

11.2   Termination

       This Agreement may be terminated by:

       (a)  the delivery by one party to another of a written notice stating
            that a condition precedent for the benefit of the party initiating
            such notice has not been fulfilled

                                     A-43
<PAGE>

            or satisfied within the time contemplated by this Agreement and that
            this Agreement is accordingly terminated;

       (b)  NPS if the Board of Directors of Allelix shall have withdrawn or
            varied in a manner determined by NPS to be adverse to NPS, its
            approval of this Agreement or the Arrangement or its unanimous
            recommendation to the Allelix Shareholders;

       (c)  Allelix if the NPS board of directors shall have withdrawn their
            unanimous recommendation to the holders of the NPS Common Shares to
            vote in favour of the resolutions contemplated in this Agreement to
            be considered at the NPS Meeting;

       (d)  Allelix in order to enter into a definitive written agreement with
            respect to a Superior Proposal, subject to compliance with Section
            6.3 and the payment of any fee required to be paid to NPS pursuant
            to Section 8.1.

       (e)  by the mutual agreement of NPS and Allelix (without further action
            on the part of the Allelix Shareholders if terminated after the
            holding of the Allelix Meeting);

       (f)  by either NPS or Allelix, if there shall be passed any law or
            regulation that makes consummation of the transactions contemplated
            by the Arrangement Agreement illegal or otherwise prohibited or if
            any injunction, order or decree enjoining NPS or Allelix from
            consummation of the transactions contemplated by the Arrangement
            Agreement is entered and such injunction, order or decree shall
            become final and non-applicable;

provided, however, nothing in this clause shall relieve a party from any
obligations that accrue prior to the date of termination nor shall it relieve a
party from any obligation under Article 10.  Further, the obligations of Allelix
to NPS contained in Article 10 hereof shall survive termination of this
Agreement.

11.3   Notices

       Any notice, request, consent, waiver, direction or other communication
required or permitted to be given under this Agreement by a party to any other
party shall be deemed to have been duly given and made, if in writing and if
served by personal delivery upon the party for whom it is intended or delivered,
by registered or certified mail, return receipt requested, or if sent by
telecopier, upon receipt to the person at the address set forth below, or such
other address as may be designated in writing hereafter, in the same manner, by
such person.

       The address for service of each of the parties hereto shall be as
follows:

       (a) if to Allelix:

               Allelix Biopharmaceuticals Inc.
               6850 Goreway Drive

                                     A-44
<PAGE>

               Mississauga, ON L4V 1V7

               Attention: John R. Evans/Paul J. Van Damme/James R. Howard-Tripp
               Telecopier No.: 905-677-1037

           with a copy to:

               Stikeman, Elliott
               Commerce Court West
               Suite 5300
               PO Box 5300
               Toronto, ON M5L 1B9

               Attention:  Robert W.A. Nicholls
               Telecopier No.:  416-947-0866



       (b) if to NPS:

               NPS Pharmaceuticals, Inc.
               420 Chipeta Way
               Salt Lake City, UT 84108

               Attention: Hunter Jackson
               Telecopier No.: 801-583-4961

           with a copy to:

               James U. Jensen
               Telecopier No.: 801-583-4961

           with a copy to:

               Blake, Cassels & Graydon
               Commerce Court West
               2800 - 199 Bay Street
               PO Box 25
               Toronto, ON M5L 1A9
               Attention: J. Rob Collins
               Telecopier No.: 416-863-2653

11.4   Time of Essence
       Time shall be of the essence in this Agreement.

                                     A-45
<PAGE>

11.5   Entire Agreement

       This Agreement constitutes the entire agreement and supersedes all other
prior agreements and undertakings, both written and oral, among the parties with
respect to the subject matter hereof.

11.6   Severability

       If any term, provision, covenant or restriction of this Agreement is held
by a court of competent jurisdiction to be invalid, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions of this Agreement
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated and the parties shall negotiate in good faith to modify this
Agreement to preserve each party's anticipated benefits under this Agreement.

11.7   Announcements

       Except as otherwise provided in this Agreement, unless required by
Applicable Law, no party to this Agreement shall make any public or private
announcement or communications in respect of the Arrangement (including, without
limitation, the existence of this Agreement or that any investigation,
discussions or negotiations are taking place concerning the evaluation of the
parties hereto or the proposed transaction) unless the prior consent of the
announcement is obtained from both parties, such consent not to be unreasonably
withheld.

11.8   Further Assurances

       Subject to the conditions herein provided, each of the parties hereto
agrees to use all reasonable efforts to take, or cause to be taken, all actions
and to do, or cause to be done, all things necessary, proper or advisable to
consummate and make effective as promptly as is practicable the proposed
transaction, including the execution and delivery of such documents as the other
party hereto may reasonably require, and use of best efforts to obtain all
necessary waivers, consents and approvals and the effecting of all necessary
registrations and filings, including, but not limited to, filings under
applicable laws and submissions of information requested by governmental
authorities.  Each of the parties hereto, where appropriate, shall reasonably
cooperate with the other party in taking such actions.  Without limiting the
generality of the foregoing, in the event any provision of the Arrangement is
not capable of being carried out under the CBCA or the OBCA as provided hereby,
the parties agree to take all such commercially reasonable action as may be
necessary to have such provision carried out under whichever statute will
facilitate implementation of the provision.

11.19  Governing Law

       This Agreement shall be governed by, and be construed in accordance with,
the laws of the Province of Ontario and the laws of Canada applicable therein
but the reference to such laws shall not, by conflict of laws rules or
otherwise, require the application of the law of any jurisdiction other than the
Province of Ontario.  Each party hereto hereby irrevocably attorns to the
jurisdiction of the Courts of the Province of Ontario in respect of all matters
arising under or in relation to this Agreement.

                                     A-46
<PAGE>

11.10  Execution in Counterparts

       This Agreement may be executed in identical counterparts, each of which
is and is hereby conclusively deemed to be an original and the counterparts
collectively are to be conclusively deemed to be one instrument.

11.11  Waiver

       No waiver by any party hereto shall be effective unless in writing and
any waiver shall affect only the matter, and the occurrence thereof,
specifically identified and shall not extend to any other matter or occurrence.

11.12  Enurement and Assignment

       This Agreement shall enure to the benefit of and be binding upon the
parties hereto and their respective successors and assigns and is not intended
to confer upon any other person any rights or remedies hereunder.  This
Agreement may not be assigned by operation of law or otherwise, except that NPS
may assign all or any portion of its rights under this Agreement to any direct
or indirect wholly-owned subsidiary of NPS, but no such assignment shall relieve
NPS of its obligations hereunder.

11.13  Subsidiary Covenants

          To the extent any representations, warranties, covenants or agreements
contained herein relate, directly or indirectly, to a Subsidiary of any party,
each such provision shall be construed as a covenant by such party to cause (to
the fullest extent to which it is legally capable) such Subsidiary to perform
the required action.

          To the extent any representations, warranties, covenants or agreements
contained herein relate, directly or indirectly, to a Subsidiary of any party,
each such provision shall be construed as a covenant by such party to cause (to
the fullest extent to which it is legally capable) such Subsidiary to perform
the required action.

                                     A-47
<PAGE>

     IN WITNESS WHEREOF the parties hereto have executed this Agreement as of
the date first above written.

                                ALLELIX BIOPHARMACEUTICALS INC.


                                By:    /s/ John R. Evans
                                       -----------------------------------
                                Name:  John R. Evans
                                Title: Chairman


                                By:    /s/ Paul J. Van Damme
                                       -----------------------------------
                                Name:  Paul J. Van Damme
                                Title: Senior Vice President and CFO

                                I/We have authority to bind the Corporation


                                NPS PHARMACEUTICALS, INC.


                                By:    /s/ Hunter Jackson
                                       -----------------------------------
                                Name:  Hunter Jackson
                                Title: Chairman and CEO



                                By:    /s/ James U. Jensen
                                       -----------------------------------
                                Name:  James U. Jensen
                                Title: Vice President, Corporate Development
                                       and Legal Affairs


                                I/We have authority to bind the Corporation


                                     A-48
<PAGE>

                              PLAN OF ARRANGEMENT
                               UNDER SECTION 182
                  OF THE BUSINESS CORPORATIONS ACT (ONTARIO)


                                   ARTICLE 1
                                INTERPRETATION

1.1       Definitions

          In this Plan of Arrangement, unless there is something in the subject
matter or context inconsistent therewith, the following terms shall have the
respective meanings set out below and grammatical variations of such terms shall
have corresponding meanings:

     "Allelix" means Allelix Biopharmaceuticals Inc.;

     "Allelix Common Shares" means the common shares of Allelix;

     "Allelix Meeting" means the special meeting of the holders of the Allelix
     Common Shares, as ordered by the Interim Order, to consider and, if
     determined advisable, approve the re-issuance and the variance of the
     exercise period of certain options granted to insiders of Allelix, to
     consider and, if determined advisable, approve the continuance of Allelix
     under the OBCA, to consider and, if determined advisable, approve the
     Arrangement;

     "Allelix Options" means the options to purchase Allelix Common Shares
     issued from time to time prior to the date hereof pursuant to the Allelix
     Stock Option Plan;

     "Allelix Preferred Shares" means the preferred share, series 1 shares of
     Allelix;

     "Allelix Warrants" means the warrants to purchase Allelix Common Shares
     issued from time to time;

     "Arrangement" means an arrangement under Section 182 of the OBCA on the
     terms and subject to the conditions set out in this Plan of Arrangement,
     subject to any amendments or variations thereto made in accordance with the
     Arrangement Agreement or Article 6 of this Plan of Arrangement or made at
     the direction of the Court in the Final Order;

     "Arrangement Agreement" means the agreement made as of the 27th day of
     September, 1999, as amended, between NPS and Allelix providing for, among
     other things, the Arrangement;

     "Arrangement Resolution" means the special resolution in respect of the
     Arrangement to be considered by the holders of Allelix Common Shares at the
     Allelix Meeting;

     "Articles of Arrangement" means the articles of arrangement of Allelix in
     respect of the Arrangement that are required by the OBCA to be sent to the
     Director after the Final Order is made;

                                      B-1
<PAGE>

     "Business Day" means any day on which commercial banks are generally open
     for business in Toronto, Canada and Salt Lake City, Utah, other than a
     Saturday, a Sunday or a day observed as a holiday in Salt Lake City, Utah
     under the laws of the State of Utah or the federal laws of the United
     States of America or in Toronto, Canada under the laws of the Province of
     Ontario or the federal laws of Canada;

     "Canadian Resident" means a resident of Canada for purposes of the ITA;

     "CBCA" means the Canada Business Corporations Act, as amended;

     "Certificate" means the certificate of arrangement giving effect to the
     Arrangement, issued pursuant to subsection 183(2) of the OBCA after the
     Articles of Arrangement have been filed;

     "Circular" means the notice of the Allelix Meeting and accompanying
     management information circular, including all appendices thereto, to be
     sent to holders of Allelix Common Shares in connection with the Allelix
     Meeting;

     "Continuance" means the continuance of Allelix under the OBCA, pursuant to
     Section 188 of the CBCA, if authorized by the passing of the Continuance
     Resolution by the holders of Allelix Common Shares at the Allelix Meeting;

     "Continuance Resolution" means the special resolution in respect of the
     Continuance to be considered by the holders of Allelix Common Shares at the
     Allelix Meeting;

     "Court" means the Ontario Superior Court of Justice (Commercial List);

     "Current Market Price" has the meaning ascribed thereto in the Exchangeable
     Share Provisions;

     "Depositary" means the depositary selected by NPS and Allelix, acting
     reasonably;

     "Director" means the Director appointed pursuant to Section 278 of the
     OBCA;

     "Dissent Rights" has the meaning  ascribed thereto in Section 3.1;

     "Dissenting Shareholder" means a holder of Allelix Common Shares who
     dissents in respect of the Arrangement in strict compliance with the
     Dissent Rights;

     "Dividend Amount" means the amount of all declared and unpaid dividends on
     an Exchangeable Share held by a holder on any dividend record date which
     occurred prior to the date of purchase or redemption of such share by NPS
     Allelix Inc. or NPS Holdings from such holder;

     "Effective Date" means the date shown on the Certificate;

     "Effective Time" means 12:01 a.m. (Toronto time) on the Effective Date;

     "Election Deadline" means 5:00 p.m. (local time) at the place of deposit on
     the date which is two Business Days prior to the date of the Allelix
     Meeting;

                                      B-2
<PAGE>

     "Exchange Ratio" means 0.3238, subject to adjustment, if any, as provided
     in Section 2.4;

     "Exchangeable Elected Share" means any Allelix Common Share held by a
     Canadian Resident that the holder thereof shall have elected, in a duly
     completed Letter of Transmittal and Election Form deposited with the
     Depositary no later than the Election Deadline, to transfer to NPS Allelix
     Inc. under the Arrangement for a fraction of an Exchangeable Share equal to
     the Exchange Ratio or that is deemed to be an Exchangeable Elected Share
     pursuant to Section 2.2(c);

     "Exchangeable Shares" means the non-voting exchangeable shares in the
     capital of NPS Allelix Inc., having substantially the rights, privileges,
     restrictions and conditions set out in the Exchangeable Share Provisions;

     "Exchangeable Share Provisions" means the rights, privileges, restrictions
     and conditions attaching to the Exchangeable Shares, which rights,
     privileges, restrictions and conditions shall be substantially as set out
     in Appendix 1 hereto;

     "Final Order" means the final order of the Court approving the Arrangement
     as such order may be amended by the Court at any time prior to the
     Effective Date or, if appealed, then, unless such appeal is withdrawn or
     denied, as affirmed;

     "Government Entity" means any (a) multinational, federal, provincial,
     state, regional, municipal, local or other government, governmental or
     public department, central bank, court, tribunal, arbitral body,
     commission, board, bureau or agency, domestic or foreign, (b) any
     subdivision, agent, commission, board, or authority of any of the
     foregoing, or (c) any quasi-governmental or private body exercising any
     regulatory, expropriation or taxing authority under or for the account of
     any of the foregoing;

     "holders" means, when used with reference to the Allelix Common Shares or
     the Allelix Preferred Shares, the holders of such shares shown from time to
     time in the registers maintained by or on behalf of Allelix in respect of
     the such shares and, when used with reference to the Exchangeable Shares,
     means the holders of Exchangeable Shares shown from time to time in the
     register maintained by or on behalf of NPS Allelix Inc. in respect of the
     Exchangeable Shares;

     "Interim Order" means the interim order of the Court, as the same may be
     amended, in respect of the Arrangement, as contemplated by Section 2.2 of
     the Arrangement Agreement;

     "ITA" means the Income Tax Act (Canada), as amended;

     "Letter of Transmittal and Election Form" means the letter of transmittal
     and election form for use by holders of Allelix Common Shares, in the form
     accompanying the Circular;

     "Liquidation Amount" has the meaning ascribed thereto in the Exchangeable
     Share Provisions;

                                      B-3
<PAGE>

     "Liquidation Call Purchase Price" has the meaning ascribed thereto in
     Section 5.1(a);

     "Liquidation Call Right" has the meaning ascribed thereto in Section
     5.1(a);

     "Liquidation Date" has the meaning ascribed thereto in the Exchangeable
     Share Provisions;

     "Meeting Date" means the date of the Allelix Meeting;

     "Nasdaq" means the National Association of Securities Dealers Automated
     Quotation System;

     "NPS" means NPS Pharmaceuticals, Inc.;

     "NPS Allelix Inc." means 3035387 Nova Scotia Limited, a company limited by
     shares formed under the Companies Act (Nova Scotia) as a wholly-owned
     subsidiary of NPS Holdings;

     "NPS Common Shares" means the shares of common stock in the capital of NPS;

     "NPS Control Transaction" has the meaning ascribed thereto in the
     Exchangeable Share Provisions;

     "NPS Elected Share" means any Allelix Common Share (other than an Allelix
     Common Share held by NPS or an affiliate thereof) held by a Canadian
     Resident that the holder thereof shall have elected, in a duly completed
     Letter of Transmittal and Election Form deposited with the Depositary no
     later than the Election Deadline, to transfer to NPS Allelix Inc. under the
     Arrangement for a fraction of a NPS Common Share equal to the Exchange
     Ratio, or that is deemed to be an NPS Elected Share pursuant to Sections
     2.2(c) or 2.3(a);

     "NPS Holdings" means NPS Holdings Company, an unlimited liability company
     formed under the Companies Act (Nova Scotia) as a wholly-owned subsidiary
     of NPS;

     "NPS Trading Price" means the average of the bid and ask prices of NPS
     Common Shares on Nasdaq during a period of twenty consecutive trading days
     ending on the Business Day immediately preceding the Effective Date;

     "OBCA" means the Business Corporations Act (Ontario), as amended;

     "Person" includes any individual, firm, partnership, joint venture, venture
     capital fund, limited liability company, unlimited liability company,
     association, trust, trustee, executor, administrator, legal personal
     representative, estate, group, body corporate, corporation, unincorporated
     association or organization, Government Entity, syndicate or other entity,
     whether or not having legal status;

     "Preference Shares" means the preference shares in the capital of NPS
     Allelix Inc. having substantially the rights, privileges, restrictions and
     conditions set forth in Appendix 2 hereto;

                                      B-4
<PAGE>

     "Redemption Call Purchase Price" has the meaning ascribed thereto in
     Section 5.2(a);

     "Redemption Call Right" has the meaning ascribed thereto in Section 5.2(a);

     "Redemption Date" has the meaning ascribed thereto in the Exchangeable
     Share Provisions;

     "Special Voting Share" means the share of NPS Special Voting Preferred
     Stock having substantially the rights, privileges, restrictions and
     conditions described in the Voting and Exchange Trust Agreement;

     "Transfer Agent" means the transfer agent to be chosen by NPS and Allelix
     to act as transfer agent of the Exchangeable Shares;

     "Trustee" means the trustee to be chosen by NPS and Allelix to act as
     trustee under the Voting and Exchange Trust Agreement, being a corporation
     organized and existing under the laws of Canada and authorized to carry on
     the business of a trust company in all the provinces of Canada, and any
     successor trustee appointed under the Voting and Exchange Trust Agreement;

     "Voting and Exchange Trust Agreement" means an agreement to be made among
     NPS, NPS Allelix Inc. and the Trustee in connection with the Plan of
     Arrangement.

     "1380390" means 1380390 Ontario Inc., a company incorporated under the OBCA
     as a wholly-owned subsidiary of Allelix;

1.2       Sections and Headings

          The division of this Plan of Arrangement into sections and the
insertion of headings are for reference purposes only and shall not affect the
interpretation of this Plan of Arrangement. Unless otherwise indicated, any
reference in this Plan of Arrangement to a section or an appendix refers to the
specified section of or appendix to this Plan of Arrangement.

1.3       Number, Gender and Persons

          In this Plan of Arrangement, unless the context otherwise requires,
words importing the singular number include the plural and vice versa and words
importing any gender include all genders.

                                   ARTICLE 2
                                  ARRANGEMENT

2.1       Binding Effect

          This Plan of Arrangement will become effective at, and be binding at
and after, the Effective Time on (i) Allelix and 1380390, (ii) NPS, NPS Holdings
and NPS Allelix Inc., (iii) all holders of Allelix Common Shares, (iv) all
holders of Exchangeable Shares, and (v) all holders of Allelix Options and
Allelix Warrants.

                                      B-5
<PAGE>

2.2       Arrangement

          Commencing at the Effective Time, the following shall occur and shall
be deemed to occur in the following order without any further act or formality:

     (a)  each NPS Elected Share will be transferred by the holder thereof,
          without any act or formality on its part, to NPS Allelix Inc. in
          exchange for a fraction of a fully-paid and non-assessable NPS Common
          Share equal to the Exchange Ratio, and the name of each such holder
          will be removed from the register of holders of Allelix Common Shares
          and added to the register of holders of NPS Common Shares and NPS
          Allelix Inc. will be recorded as the registered holder of such Allelix
          Common Shares so exchanged and will be deemed to be the legal and
          beneficial owner thereof;

     (b)  each Exchangeable Elected Share will be transferred by the holder
          thereof, without any act or formality on its part, to NPS Allelix Inc.
          in exchange for a fraction of a fully-paid and non-assessable
          Exchangeable Share equal to the Exchange Ratio, and the name of each
          such holder will be removed from the register of holders of Allelix
          Common Shares and added to the register of holders of Exchangeable
          Shares and NPS Allelix Inc. will be recorded as the registered holder
          of such Allelix Common Shares so exchanged and will be deemed to be
          the legal and beneficial owner thereof;

     (c)  each Allelix Common Share in respect of which a duly completed Letter
          of Transmittal and Election Form has not been deposited with the
          Depositary on or prior to the Election Deadline (other than (i)
          Allelix Common Shares held by Dissenting Shareholders who are
          ultimately entitled to be paid the fair value of the Allelix Common
          Shares held by them and (ii) Allelix Common Shares held by NPS or any
          affiliate thereof which shall not be exchanged under this Arrangement
          and shall remain outstanding as Allelix Common Shares held by NPS or
          any affiliate thereof), (A) in the case of a holder of Allelix Common
          Shares whose address as shown in the register of Allelix Common Shares
          as of the close of business (Toronto time) on the day preceding the
          Effective Date is in Canada will be deemed to be an Exchangeable
          Elected Share and will be transferred by the holder thereof, without
          any act or formality on its part, to NPS Allelix Inc. in exchange for
          that number of fully paid and non-assessable Exchangeable Shares equal
          to the Exchange Ratio, and the name of each such holder of Allelix
          Common Shares will be removed from the register of holders of Allelix
          Common Shares and added to the register of holders of Exchangeable
          Shares and NPS Allelix Inc. will be recorded as the registered holder
          of such Allelix Common Shares so exchanged and will be deemed to be
          the legal and beneficial owner thereof, and (B) in the case of a
          holder of Allelix Common Shares whose address as shown in the register
          of Allelix Common Shares as of the close of business (Toronto time) on
          the day preceding the Effective Date is not in Canada will be deemed
          to be a NPS Elected Share and will be transferred by the holder
          thereof, without any act or formality on its part, to NPS Allelix Inc.
          in exchange for a fraction of a fully-paid and non-assessable NPS
          Common Share equal to the Exchange Ratio, and the name of each such
          holder will be removed from the

                                      B-7
<PAGE>

          register of holders of Allelix Common Shares and added to the register
          of holders of NPS Common Shares and NPS Allelix Inc. will be recorded
          as the registered holder of such Allelix Common Shares so exchanged
          and will be deemed to be the legal and beneficial owner thereof;

     (d)  in accordance with the terms of the Allelix Warrants, after the
          Effective Time, a holder of Allelix Warrants shall be entitled, upon
          the exercise of such warrants, to receive in lieu of the number of
          Allelix Common Shares to which such holder was theretofore entitled to
          receive upon such exercise, that aggregate number of Exchangeable
          Shares or NPS Common Shares, as applicable, that such holder would
          have been entitled to receive under the Plan of Arrangement if such
          holder had been the registered holder of that number of Allelix Common
          Shares that such holder was theretofore entitled to receive if all
          such holder's Allelix Warrants had been exercised immediately prior to
          the Effective Time. Each holder of Allelix Warrants who is a Canadian
          Resident will be entitled to receive Exchangeable Shares and each
          holder of Allelix Warrants who is not a Canadian Resident will be
          entitled to receive NPS Common Shares;

     (e)  in accordance with the terms of the Allelix Options, after the
          Effective Time, a holder of Allelix Options shall be entitled, upon
          the exercise of such options, to receive in lieu of the number of
          Allelix Common Shares to which such holder was theretofore entitled to
          receive upon such exercise, that aggregate number of NPS Common Shares
          that such holder would have been entitled to receive under the Plan of
          Arrangement if such holder had been the registered holder of that
          number of Allelix Common Shares that such holder was theretofore
          entitled to receive if all such holder's Allelix Options had been
          exercised immediately prior to the Effective Time;

     (f)  the Allelix Preferred Shares shall, in addition to and subject to the
          rights, privileges, restrictions and conditions attaching to the
          Preferred Shares as a Class, have attached thereto, and be subject to,
          the rights, privileges, restrictions and conditions set forth in
          Appendix II;

     (g)  NPS shall issue to and deposit with the Trustee the Special Voting
          Share, in consideration of the payment to NPS of U.S. $1, to be
          thereafter held of record by the Trustee as trustee for and on behalf
          of, and for the use and benefit of, the holders of the Exchangeable
          Shares in accordance with the Voting and Exchange Trust Agreement;

     (h)  the right and obligation of Johnson & Johnson Development Corporation
          ("J&J") (or any successor) to purchase Allelix Common Shares pursuant
          to section 1.2 of that certain stock purchase agreement dated as of
          October 30, 1998 between Allelix and J&J shall be deemed to be and
          shall become the right and obligation of J&J (or any successor) to
          purchase, by no later than April 30, 2000, that number of NPS Common
          Shares determined by dividing U.S.$2,000,000 by the Current Market
          Price of the NPS Common Shares which in any event shall not be more
          than U.S.$27.79 or less than $12.20, without any further act or
          formality on the part of the parties; and

                                      B-7
<PAGE>

     (i)  Allelix and 1380390 will amalgamate and continue as one corporation
          under the OBCA upon terms to be set out in articles of arrangement and
          the following terms:

          (i)       the name of the amalgamated corporation will be NPS Allelix
                    Corp.;

          (ii)      the shares of 1380390 shall be cancelled without any
                    repayment of capital in respect thereof;

          (iii)     the by-laws of the amalgamated corporation shall be the same
                    as the by-laws of Allelix; and

          (iv)      no securities shall be issued and no assets shall be
                    distributed by the amalgamated corporation in connection
                    with the amalgamation.

2.3       Elections

     (a)  Each Person who, at or prior to the Election Deadline, is a holder of
          record of Allelix Common Shares will be entitled, with respect to all
          or a portion of such shares, to make an election at or prior to the
          Election Deadline to receive Exchangeable Shares or NPS Common Shares,
          or a combination thereof, in exchange for such holder's Allelix Common
          Shares on the basis set forth herein and in the Letter of Transmittal
          and Election Form; provided that, notwithstanding anything to the
          contrary herein, a holder of Allelix Common Shares who is not a
          Canadian Resident will not be entitled to elect to receive
          Exchangeable Shares and any such election otherwise made by any such
          holder shall be and be deemed to be an election to receive a NPS
          Elected Share.

     (b)  Each Person who, at or prior to the Election Deadline, is a holder of
          record of Allelix Common Shares and who is Canadian Resident, other
          than a holder who is exempt from tax under the ITA, who has elected
          (or is deemed to have elected) to receive Exchangeable Shares shall be
          entitled to make an income tax election pursuant to subsection 85(l)
          of the ITA or, if the holder is a partnership, subsection 85(2) of the
          ITA (and in each case, where applicable, the analogous provisions of
          provincial income tax law) with respect to the transfer of its Allelix
          Common Shares to NPS Allelix Inc. by providing two signed copies of
          the necessary prescribed election forms to the Depositary within 90
          days following the Effective Date, duly completed with the details of
          the number of Allelix Common Shares transferred and the applicable
          agreed amounts for the purposes of such elections. Thereafter, subject
          to the election forms being correct and complete and complying with
          the provisions of the ITA (and applicable provincial income tax law),
          the forms will be signed by NPS Allelix Inc. and returned to such
          holder within 30 days after the receipt thereof by the Depositary for
          filing with Revenue Canada (or the applicable provincial taxing
          authority). NPS Allelix Inc. will not be responsible for the proper
          completion of any election form and, except for NPS Allelix Inc.'s
          obligation to return duly completed election forms which are received
          by the Depositary within 90 days of the Effective Date, within 30 days
          after the receipt thereof by the Depositary, NPS Allelix Inc. will not
          be

                                      B-8
<PAGE>

          responsible for any taxes, interest or penalties resulting from the
          failure by a holder of Allelix Common Shares to properly complete or
          file the election forms in the form and manner and within the time
          prescribed by the ITA (or any applicable provincial legislation). In
          its sole discretion, NPS Allelix Inc. may choose to sign and return an
          election form received more than 90 days following the Effective Date,
          but NPS Allelix Inc. will have no obligation to do so.

2.4  Adjustments to Exchange Ratio

     The Exchange Ratio shall be adjusted to reflect fully the effect of any
stock split, reverse split, stock dividend (including any dividend or
distribution of securities convertible into NPS Common Shares or Allelix Common
Shares other than stock dividends paid in lieu of ordinary course dividends),
reorganization, recapitalization or other like change with respect to NPS Common
Shares or Allelix Common Shares occurring after the date of the Arrangement
Agreement and prior to the Effective Time.


                                   ARTICLE 3
                               RIGHTS OF DISSENT

3.1       General

          Notwithstanding Article 2, each holder of Allelix Common Shares is
entitled to dissent from the Arrangement Resolution and to be paid by Allelix
the fair value of the Allelix Common Shares held by such holder in respect of
which such holder dissents, determined as of the day before the date on which
the Arrangement Resolution is passed (and in the event the Arrangement becomes
effective) (the "Dissent Right"), provided that (i) such holder complies with
Section 190 of the CBCA, and (ii) such holder shall not have voted any of its
Allelix Common Shares in favour of the Arrangement Resolution at the Allelix
Meeting in person or by proxy.

3.2       Treatment of Dissenting Shareholders

          A holder of Allelix Common Shares who:

     (a)  properly exercises the Dissent Right by complying with all of the
          procedures (the "Dissent Procedures") required to be complied with by
          a Dissenting Shareholder, will:

          (i)       be bound by the provisions of this Article 3,

          (ii)      be deemed not to have participated in the Arrangement, and

          (iii)     cease to have any rights as a holder of Allelix Common
                    Shares other than the right to be paid the fair value of the
                    Allelix Common Shares by Allelix in accordance with the
                    Dissent Procedures, or

     (b)  seeks to exercise the Dissent Right, but:

                                      B-9
<PAGE>

          (i)       who for any reason does not properly fulfil each of the
                    Dissent Procedures required to be completed by a Dissenting
                    Shareholder, or

          (ii)      subsequent to giving its written notice of dissent provided
                    for in Section 190 of the CBCA in respect of the Arrangement
                    Resolution, acts inconsistently with such dissent,

          will be deemed to have participated in the Arrangement on the same
          basis as each holder of Allelix Common Shares and shall receive such
          number of NPS Common Shares or Exchangeable Shares as it is entitled
          to on the basis determined in accordance with Article 2;

     and a holder of Allelix Common Shares or Allelix Preferred Shares who:

     (c)  validly exercises the rights of dissent provided for under Section 190
          of the CBCA in respect of the Continuance Resolution will (in the
          event the Continuance becomes effective):

          (i)  be deemed not to have participated in the Continuance or the
               Arrangement, and

          (ii) cease to have any rights as a holder of Allelix Common Shares or
               Allelix Preferred Shares, as the case may be, other than the
               right to be paid the fair value of the such shares by Allelix in
               accordance with Section 190 of the CBCA, or

     (d)  seeks to exercise the rights of the dissent provided for under Section
          190 of the CBCA in respect of the Continuance Resolution, but:

          (i)  who for any reason does not properly fulfil each of the dissent
               procedures required to be completed by a dissenting shareholder;
               or

          (ii) subsequent to giving its notice of dissent as provided for under
               Section 190 of the CBCA, acts inconsistently with such dissent,

          will be deemed to have participated in the Continuance and the
          Arrangement on the basis that they had not dissented and shall receive
          such number of NPS Common Shares or Exchangeable Shares as they are
          entitled to on the basis determined in accordance with Article 2.


                                   ARTICLE 4
                      CERTIFICATES AND FRACTIONAL SHARES

4.1       Issuance of Certificates Representing Exchangeable Shares

          At or promptly after the Effective Time, NPS Allelix Inc. shall
deposit with the Depositary, for the benefit of the holders of Allelix Common
Shares who will receive Exchangeable Shares in connection with the Arrangement,
certificates representing that number

                                     B-10
<PAGE>

of whole Exchangeable Shares to be delivered pursuant to Section 2.2 upon the
exchange of Allelix Common Shares. Upon surrender to the Depositary for
cancellation of a certificate which immediately prior to the Effective Time
represented Allelix Common Shares that were exchanged for Exchangeable Shares
under the Arrangement, together with such other documents and instruments as
would have been required to effect the transfer of the shares formerly
represented by such certificate under the OBCA and the articles and by-laws of
Allelix and such additional documents and instruments as the Depositary may
reasonably require the holder of such surrendered certificate shall be entitled
to receive in exchange therefor, and the Depositary shall deliver to such
holder, a certificate representing that number (rounded up to the nearest whole
number) of Exchangeable Shares which such holder has the right to receive
(together with any dividends or distributions with respect thereto pursuant to
Section 4.3), and the certificate so surrendered shall forthwith be cancelled.
In the event of a transfer of ownership of Allelix Common Shares that is not
registered in the transfer records of Allelix, a certificate representing the
proper number of Exchangeable Shares may be issued to the transferee if the
certificate representing such Allelix Common Shares is presented to the
Depositary, accompanied by all documents required to evidence and effect such
transfer. Until surrendered as contemplated by this Section 4.1, each
certificate which immediately prior to the Effective Time represented Allelix
Common Shares that were exchanged for Exchangeable Shares shall be deemed at all
times after the Effective Time to represent only the right to receive upon such
surrender (i) the certificate representing Exchangeable Shares as contemplated
by this Section 4.1, (ii) a cash payment in lieu of any fractional Exchangeable
Shares as contemplated by Section 4.4 and (iii) any dividends or distributions
with a record date after the Effective Time theretofore paid or payable with
respect to Exchangeable Shares as contemplated by Section 4.3.

4.2       Issuance of Certificates representing NPS Common Shares

          At or promptly after the Effective Time, NPS Allelix Inc. shall
deposit with the Depositary, for the benefit of the holders of Allelix Common
Shares who will receive NPS Common Shares in connection with the Arrangement,
certificates representing that whole number of NPS Common Shares to be delivered
pursuant to Section 2.2 upon the exchange of Allelix Common Shares.  Upon
surrender to the Depositary for cancellation of a certificate which immediately
prior to the Effective Time represented outstanding Allelix Common Shares that
were exchanged for NPS Common Shares under the Arrangement, together with such
other documents and instruments as would have been required to effect the
transfer of the shares formerly represented by such certificate under the OBCA,
the articles and by-laws of Allelix and such additional documents and
instruments as the Depositary may reasonably require, the holder of such
surrendered certificate shall be entitled to receive in exchange therefor, and
the Depositary shall deliver to such holder, a certificate representing that
number (rounded up to the nearest whole number) of NPS Common Shares which such
holder has the right to receive (together with any dividends or distributions
with respect thereto pursuant to Section 4.3), and the certificate so
surrendered shall forthwith be cancelled. In the event of a transfer of
ownership of Allelix Common Shares which is not registered in the transfer
records of Allelix, a certificate representing the proper number of NPS Common
Shares may be issued to the transferee if the certificate representing such
Allelix Common Shares is presented to the Depositary, accompanied by all
documents required to evidence and effect such transfer. Until surrendered as
contemplated by this Section 4.2, each certificate which immediately prior to
the Effective Time represented one or more outstanding Allelix Common Shares
that were exchanged for NPS Common Shares shall be deemed at all times after the
Effective Time to represent only the right

                                     B-11
<PAGE>

to receive upon such surrender (i) the certificate representing NPS Common
Shares as contemplated by this Section 4.2, (ii) a cash payment in lieu of any
fractional NPS Common Shares as contemplated by Section 4.4 and (iii) any
dividends or distributions with a record date after the Effective Time
theretofore paid or payable with respect to NPS Common Shares as contemplated by
Section 4.3.

4.3       Distributions with Respect to Unsurrendered Certificates

          No dividends or other distributions declared or made after the
Effective Time with respect to Exchangeable Shares or NPS Common Shares with a
record date after the Effective Time shall be paid to the holder of any
unsurrendered certificate which immediately prior to the Effective Time
represented outstanding Allelix Common Shares that were exchanged pursuant to
Section 2.2, and no interest shall be earned or payable on these proceeds,
unless and until the holder of such certificate shall surrender such certificate
in accordance with Section 4.1 or 4.2. Subject to applicable law and to Section
4.6, at the time of such surrender of any such certificate (or, in the case of
clause (ii) below, at the appropriate payment date), there shall be paid to the
holder of the certificates representing Allelix Common Shares, as the case may
be, without interest, (i) the amount of dividends or other distributions with a
record date after the Effective Time theretofore paid with respect to the
Exchangeable Shares or NPS Common Shares, as the case may be, to which such
holder is entitled pursuant hereto and (ii) on the appropriate payment date, the
amount of dividends or other distributions with a record date after the
Effective Time but prior to surrender and a payment date subsequent to surrender
payable with respect to such Exchangeable Shares or NPS Common Shares, as the
case may be.

4.4       No Fractional Shares

          No certificates representing fractional Exchangeable Shares or
fractional NPS Common Shares shall be issued upon the surrender for exchange of
certificates pursuant to Section 4.1 or 4.2 and no dividend, stock split or
other change in the capital structure of NPS Allelix Inc. shall relate to any
such fractional security and such fractional interests shall not entitle the
owner thereof to exercise any rights as a security holder of NPS Allelix Inc. In
lieu of any such fractional securities, each Person otherwise entitled to a
fractional interest in an Exchangeable Share or to a fractional interest in a
NPS Common Share will receive a share certificate evidencing that number of
shares to which such Person is otherwise entitled, rounded up to the nearest
whole number.

4.5       Lost Certificates

          In the event that any certificate which immediately prior to the
Effective Time represented one or more outstanding Allelix Common Shares that
were exchanged pursuant to Section 2.2 shall have been lost, stolen or
destroyed, upon the making of an affidavit of that fact by the Person claiming
such certificate to be lost, stolen or destroyed, the Depositary will issue in
exchange for such lost, stolen or destroyed certificate, any cash pursuant to
Section 4.4 and/or one or more certificates representing one or more
Exchangeable Shares or NPS Common Shares (and any dividends or distributions
with respect thereto) deliverable in accordance with such holder's Letter of
Transmittal and Election Form. When authorizing such payment in exchange for any
lost, stolen or destroyed certificate, the Person to whom certificates
representing Exchangeable Shares or NPS Common Shares are to be issued shall, as
a condition precedent to

                                     B-12
<PAGE>

the issuance thereof, give a bond satisfactory to NPS Allelix Inc., NPS and
their respective transfer agents in such sum as NPS Allelix Inc. or NPS may
direct or otherwise indemnify NPS Allelix Inc. and NPS in a manner satisfactory
to NPS Allelix Inc. and NPS against any claim that may be made against NPS
Allelix Inc. or NPS with respect to the certificate alleged to have been lost,
stolen or destroyed.

4.6       Extinction of Rights

          Any certificate which immediately prior to the Effective Time
represented outstanding Allelix Common Shares that were exchanged pursuant to
Section 2.2 that is not deposited with all other instruments required by Section
4.1 or 4.2 on or prior to the date of the notice referred to in Section 7.2 of
the Exchangeable Share Provisions shall cease to represent a claim or interest
of any kind or nature as a shareholder of NPS Allelix Inc. or NPS. On such date,
the Exchangeable Shares or NPS Common Shares to which the former holder of the
certificate referred to in the preceding sentence was ultimately entitled shall
be deemed to have been surrendered for no consideration to NPS Allelix Inc. or
NPS, as the case may be, together with all entitlements to dividends,
distributions and interest in respect thereof held for such former holder.  None
of NPS, NPS Allelix Inc., NPS Holdings or the Depositary shall be liable to any
person in respect of any NPS Common Shares or Exchangeable Shares (or dividends,
distributions and interest in respect thereof) delivered to a public official
pursuant to any applicable abandoned property, escheat or similar law.

4.7       Withholding Rights

          NPS Allelix Inc., NPS Holdings, NPS and the Depositary shall be
entitled to deduct and withhold from any dividend or consideration otherwise
payable pursuant to transactions contemplated by this Agreement to any holder of
Allelix Common Shares, NPS Common Shares or Exchangeable Shares such amounts as
NPS Allelix Inc., NPS Holdings, NPS or the Depositary is required or permitted
to deduct and withhold with respect to such payment under the ITA, the United
States Internal Revenue Code of 1986 or any provision of provincial, state,
local or foreign tax law, in each case, as amended. To the extent that amounts
are so withheld, such withheld amounts shall be treated for all purposes hereof
as having been paid to the holder of the shares in respect of which such
deduction and withholding was made, provided that such withheld amounts are
actually remitted to the appropriate taxing authority. To the extent that the
amount so required or permitted to be deducted or withheld from any payment to a
holder exceeds the cash portion of the consideration otherwise payable to the
holder, NPS Allelix Inc., NPS Holdings, NPS and the Depositary are hereby
authorized to sell or otherwise dispose of such portion of the consideration as
is necessary to provide sufficient funds to NPS Allelix Inc., NPS Holdings, NPS
or the Depositary, as the case may be, to enable it to comply with such
deduction or withholding requirement and NPS Allelix Inc., NPS Holdings, NPS or
the Depositary shall notify the holder thereof and remit any unapplied balance
of the net proceeds of such sale.

                                     B-13
<PAGE>

                                   ARTICLE 5
         CERTAIN RIGHTS OF NPS HOLDINGS TO ACQUIRE EXCHANGEABLE SHARES

5.1       NPS Holdings Liquidation Call Right

     (a)  NPS Holdings shall have the overriding right (the "Liquidation Call
          Right"), in the event of and notwithstanding the proposed liquidation,
          dissolution or winding-up of NPS Allelix Inc. pursuant to Article 5 of
          the Exchangeable Share Provisions, to purchase from all but not less
          than all of the holders of Exchangeable Shares (other than any holder
          of Exchangeable Shares which is an affiliate of NPS) on the
          Liquidation Date all but not less than all of the Exchangeable Shares
          held by each such holder on payment by NPS Holdings of an amount per
          share (the "Liquidation Call Purchase Price") equal to the Current
          Market Price of a NPS Common Share on the last Business Day prior to
          the Liquidation Date, which shall be satisfied in full by NPS Holdings
          causing to be delivered to such holder one NPS Common Share, plus any
          Dividend Amount for each Exchangeable Share held by such holder. In
          the event of the exercise of the Liquidation Call Right by NPS
          Holdings, each holder shall be obligated to sell all the Exchangeable
          Shares held by the holder to NPS Holdings on the Liquidation Date on
          payment by NPS Holdings to the holder of the Liquidation Call Purchase
          Price for each such share, and NPS Allelix Inc. shall have no
          obligation to pay any Liquidation Amount to the holders of such shares
          so purchased by NPS Holdings.

     (b)  To exercise the Liquidation Call Right, NPS Holdings must notify the
          Trustee, as agent for the holders of Exchangeable Shares, and NPS
          Allelix Inc. of NPS Holdings's intention to exercise such right at
          least 45 days before the Liquidation Date in the case of a voluntary
          liquidation, dissolution or winding-up of NPS Allelix Inc. and at
          least five Business Days before the Liquidation Date in the case of an
          involuntary liquidation, dissolution or winding-up of NPS Allelix Inc.
          The Trustee will notify the holders of Exchangeable Shares as to
          whether or not NPS Holdings has exercised the Liquidation Call Right
          forthwith after the expiry of the period during which the same may be
          exercised by NPS Holdings. If NPS Holdings exercises the Liquidation
          Call Right, then on the Liquidation Date, NPS Holdings will purchase
          and the holders will sell all of the Exchangeable Shares then
          outstanding for a price per share equal to the Liquidation Call
          Purchase Price.

     (c)  For the purposes of completing the purchase of the Exchangeable Shares
          pursuant to the Liquidation Call Right, NPS Holdings shall deposit
          with the Transfer Agent, on or before the Liquidation Date,
          certificates representing the aggregate number of NPS Common Shares
          deliverable by NPS Holdings and a cheque or cheques of NPS Holdings
          payable at par at any branch of the bankers of NPS Holdings
          representing the aggregate Dividend Amount in payment of the total
          Liquidation Call Purchase Price, less any amounts withheld pursuant to
          Section 4.7 hereof. Provided that NPS Holdings has complied with the
          immediately preceding sentence, on and after the Liquidation Date the
          rights of each holder of Exchangeable Shares will be limited to
          receiving such holder's proportionate part

                                     B-14
<PAGE>

          of the total Liquidation Call Purchase Price payable by NPS Holdings
          upon presentation and surrender by the holder of certificates
          representing the Exchangeable Shares held by such holder and the
          holder shall on and after the Liquidation Date be considered and
          deemed for all purposes to be the holder of the NPS Common Shares to
          which it is entitled. Upon surrender to the Transfer Agent of a
          certificate or certificates representing Exchangeable Shares, together
          with such other documents and instruments as may be required to effect
          a transfer of Exchangeable Shares under the governing corporate
          statute and the by-laws of NPS Allelix Inc. and such additional
          documents and instruments as the Transfer Agent may reasonably
          require, the holder of such surrendered certificate or certificates
          shall be entitled to receive in exchange therefor, and the Transfer
          Agent on behalf of NPS Holdings shall deliver to such holder,
          certificates representing the NPS Common Shares to which the holder is
          entitled and a cheque or cheques of NPS Holdings payable at par at any
          branch of the bankers of NPS Holdings in payment of the remaining
          portion, if any, of the total Liquidation Call Purchase Price, less
          any amounts withheld pursuant to Section 4.7 hereof. If NPS Holdings
          does not exercise the Liquidation Call Right in the manner described
          above, on the Liquidation Date the holders of the Exchangeable Shares
          will be entitled to receive in exchange therefor the Liquidation
          Amount otherwise payable by NPS Allelix Inc. in connection with the
          liquidation, dissolution or winding-up of NPS Allelix Inc. pursuant to
          Article 5 of the Exchangeable Share Provisions.

5.2       NPS Holdings Redemption Call Right

          In addition to NPS Holdings's rights contained in the Exchangeable
Share Provisions, including, without limitation, the Retraction Call Right (as
defined in the Exchangeable Share Provisions), NPS Holdings shall have the
following rights in respect of the Exchangeable Shares:

     (a)  NPS Holdings shall have the overriding right (the "Redemption Call
          Right"), notwithstanding the proposed redemption of the Exchangeable
          Shares by NPS Allelix Inc. pursuant to Article 7 of the Exchangeable
          Share Provisions, to purchase from all but not less than all of the
          holders of Exchangeable Shares (other than any holder of Exchangeable
          Shares which is an affiliate of NPS) on the Redemption Date all but
          not less than all of the Exchangeable Shares held by each such holder
          on payment by NPS to each holder of an amount per Exchangeable Share
          (the "Redemption Call Purchase Price") equal to the Current Market
          Price of a NPS Common Share on the last Business Day prior to the
          Redemption Date, which shall be satisfied in full by NPS Holdings
          causing to be delivered to such holder one NPS Common Share, plus any
          Dividend Amount for each Exchangeable Share held by such holder. In
          the event of the exercise of the Redemption Call Right by NPS
          Holdings, each holder shall be obligated to sell all the Exchangeable
          Shares held by the holder to NPS Holdings on the Redemption Date on
          payment by NPS Holdings to the holder of the Redemption Call Purchase
          Price for each such share, and NPS Allelix Inc. shall have no
          obligation to redeem, or to pay any Dividend Amount in respect of,
          such shares so purchased by NPS Holdings.

                                     B-15
<PAGE>

     (b)  To exercise the Redemption Call Right, NPS Holdings must notify the
          Trustee, as agent for the holders of Exchangeable Shares, and NPS
          Allelix Inc. of NPS Holdings's intention to exercise such right at
          least 60 days before the Redemption Date, except in the case of a
          redemption occurring as a result of a NPS Control Transaction, an
          Exchangeable Share Voting Event or an Exempt Exchangeable Share Voting
          Event (each as defined in the Exchangeable Share Provisions), in which
          case NPS Holdings shall so notify the Trustee and NPS Allelix Inc. on
          or before the Redemption Date. The Trustee will notify the holders of
          the Exchangeable Shares as to whether or not NPS Holdings has
          exercised the Redemption Call Right forthwith after the expiry of the
          period during which the same may be exercised by NPS Holdings. If NPS
          Holdings exercises the Redemption Call Right, on the Redemption Date
          NPS Holdings will purchase and the holders will sell all of the
          Exchangeable Shares then outstanding for a price per share equal to
          the Redemption Call Purchase Price.

     (c)  For the purposes of completing the purchase of the Exchangeable Shares
          pursuant to the Redemption Call Right, NPS Holdings shall deposit with
          the Trustee, on or before the Redemption Date, certificates
          representing the aggregate number of NPS Common Shares deliverable by
          NPS Holdings and a cheque or cheques of NPS Holdings payable at par at
          any branch of the bankers of NPS Holdings representing the aggregate
          Dividend Amount in payment of the total Redemption Call Purchase
          Price, less any amounts withheld pursuant to Section 4.7 hereof.
          Provided that NPS Holdings has complied with the immediately preceding
          sentence, on and after the Redemption Date the rights of each holder
          of Exchangeable Shares will be limited to receiving such holder's
          proportionate part of the total Redemption Call Purchase Price payable
          by NPS Holdings upon presentation and surrender by the holder of
          certificates representing the Exchangeable Shares held by such holder
          and the holder shall on and after the Redemption Date be considered
          and deemed for all purposes to be the holder of the NPS Common Shares
          to which it is entitled. Upon surrender to the Trustee of a
          certificate or certificates representing Exchangeable Shares, together
          with such other documents and instruments as may be required to effect
          a transfer of Exchangeable Shares under the governing corporate
          statute and the by-laws of NPS Allelix Inc. and such additional
          documents and instruments as the Trustee may reasonably require, the
          holder of such surrendered certificate or certificates shall be
          entitled to receive in exchange therefor, and the Trustee on behalf of
          NPS Holdings shall deliver to such holder, certificates representing
          the NPS Common Shares to which the holder is entitled and a cheque or
          cheques of NPS Holdings payable at par at any branch of the bankers of
          NPS Holdings in payment of the remaining portion, if any, of the total
          Redemption Call Purchase Price, less any amounts withheld pursuant to
          Section 4.7 hereof. If NPS Holdings does not exercise the Redemption
          Call Right in the manner described above, on the Redemption Date the
          holders of the Exchangeable Shares will be entitled to receive in
          exchange therefor the redemption price otherwise payable by NPS
          Allelix Inc. in connection with the redemption of the Exchangeable
          Shares pursuant to Article 7 of the Exchangeable Share Provisions.

                                     B-16
<PAGE>

                                   ARTICLE 6
                                  AMENDMENTS

6.1       Amendments to Plan of Arrangement

          Allelix reserves the right to amend, modify and/or supplement this
Plan of Arrangement at any time and from time to time prior to the Effective
Date, provided that each such amendment, modification and/or supplement must be
(i) set out in writing, (ii) consented to by NPS, (iii) filed with the Court
and, if made following the Allelix Meeting, approved by the Court and (iv)
communicated to holders of Allelix Common Shares, Allelix Options, Allelix
Warrants and Allelix Preferred Shares, if and as required by the Court.

          Any amendment, modification or supplement to this Plan of Arrangement
may be proposed by Allelix at any time prior to the Allelix Meeting (provided
that NPS shall have consented thereto) with or without any other prior notice or
communication, and if so proposed and accepted by the Persons voting at the
Allelix Meeting (other than as may be required under the Interim Order), shall
become part of this Plan of Arrangement for all purposes.

          Any amendment, modification or supplement to this Plan of Arrangement
that is approved by the Court following the Allelix Meeting shall be effective
only if (i) it is consented to by each of Allelix and NPS and (ii) if required
by the Court, it is consented to by holders of the Allelix Common Shares,
Allelix Options, Allelix Warrants or Allelix Preferred Shares voting in the
manner directed by the Court.

          Any amendment, modification or supplement to this Plan of Arrangement
may be made following the Effective Date unilaterally by NPS, provided that it
concerns a matter which, in the reasonable opinion of NPS, is of an
administrative nature required to better give effect to the implementation of
this Plan of Arrangement and is not adverse to the financial or economic
interests of any holder of Allelix Common Shares, Allelix Options, Allelix
Warrants, or Allelix Preferred Shares.

                                   ARTICLE 7
                              FURTHER ASSURANCES

7.1       Notwithstanding that the transactions and events set out herein shall
occur and be deemed to occur in the order set out in this Plan of Arrangement
without any further act or formality, each of the parties to the Arrangement
Agreement shall make, do and execute, or cause to be made, done and executed,
all such further acts, deeds, agreements, transfers, assurances, instruments or
documents as may reasonably be required by any of them in order further to
document or evidence any of the transactions or events set out herein.

                                     B-17
<PAGE>

                                  APPENDIX I
                          TO THE PLAN OF ARRANGEMENT

                          PROVISIONS ATTACHING TO THE
                            EXCHANGEABLE SHARES OF
                               NPS ALLELIX INC.

The Exchangeable Shares shall have the following rights, privileges,
restrictions and conditions:

                                   ARTICLE 1
                                INTERPRETATION

1.1       For the purposes of these share provisions:

     "Act" means the Companies Act (Nova Scotia)

     "affiliate" has the meaning ascribed thereto in the Securities Act;

     "Allelix" means Allelix Biopharmaceuticals Inc.;

     "Allelix Common Shares" means the common shares of Allelix as constituted
     on the date hereof;

     "Allelix Meeting" means the special meeting of Allelix Shareholders, as
     ordered by the Interim Order to consider and, if determined advisable,
     approve the repricing of certain Allelix Options as approved by the Allelix
     board of directors on April 15, 1999; to consider, and if determined
     advisable, approve the continuance of Allelix under the OBCA and to
     consider, and if determined advisable, approve the Arrangement;

     "Allelix Options" means the options to purchase Allelix Common Shares
     issued from time to time prior to the date hereof pursuant to the Allelix
     Stock Option Plan;

     "Allelix Preferred Shares" means the preferred shares, series 1 of Allelix
     as constituted on the date hereof;

     "Allelix Warrants" means the warrants to purchase Allelix Common Shares
     issued from time to time prior to the date hereof;

     "Arrangement" means an arrangement under Section 182 of the OBCA on the
     terms and subject to the conditions set out in the Plan of Arrangement, to
     which plan these share provisions are attached as Appendix 1, subject to
     any amendments or variations thereto made in accordance with Article 6 of
     the Plan of Arrangement or made at the direction of the Court in the Final
     Order;

     "Arrangement Agreement" means the agreement made as of the 27th day of
     September, 1999 between NPS and Allelix, as amended, supplemented and/or
     restated in accordance therewith prior to the Effective Date, providing
     for, among other things, the Arrangement;

                                      B-18
<PAGE>

     "Board of Directors" means the Board of Directors of the Company;

     "Business Day" means any day on which commercial banks are generally open
     for business in Salt Lake City, Utah and Toronto, Ontario, other than a
     Saturday, a Sunday or a day observed as a holiday in Salt Lake City, Utah
     under the laws of the State of Utah or the federal laws of the United
     States of America or in Toronto, Ontario under the laws of the Province of
     Ontario or the federal laws of Canada;

     "CBCA" means the Canada Business Corporations Act, as amended;

     "Canadian Dollar Equivalent" means in respect of an amount expressed in a
     currency other than Canadian dollars (the "Foreign Currency Amount") at any
     date the product obtained by multiplying:

     (a)  the Foreign Currency Amount by,

     (b)  the noon spot exchange rate on such date for such foreign currency
          expressed in Canadian dollars as reported by the Bank of Canada or, in
          the event such spot exchange rate is not available, such spot exchange
          rate on such date for such foreign currency expressed in Canadian
          dollars as may be deemed by the Board of Directors to be appropriate
          for such purpose;

     "Common Shares" means the common shares in the capital of the Company;

     "Company" means 3035387 Nova Scotia Limited, a company limited by shares
     formed under the Act, as a wholly-owned subsidiary of NPS Holdings;

     "Current Market Price" means, in respect of a NPS Common Share on any date,
     the Canadian Dollar Equivalent of the average of the closing bid and asked
     prices of NPS Common Shares during a period of 20 consecutive trading days
     ending not more than three trading days before such date on Nasdaq, or, if
     the NPS Common Shares are not then quoted on Nasdaq, on such other stock
     exchange or automated quotation system on which the NPS Common Shares are
     listed or quoted, as the case may be, as may be selected by the Board of
     Directors for such purpose; provided, however, that if in the opinion of
     the Board of Directors the public distribution or trading activity of NPS
     Common Shares during such period does not create a market which reflects
     the fair market value of an NPS Common Share, then the Current Market Price
     of a NPS Common Share shall be determined by the Board of Directors, in
     good faith and in its sole discretion, and provided further that any such
     selection, opinion or determination by the Board of Directors shall be
     conclusive and binding;

     "Director" means the Director appointed pursuant to Section 273 of the
     OBCA;

     "Dividend Amount" means the amount of all declared and unpaid dividends on
     an Exchangeable Share held by a holder on any dividend record date which
     occurred prior to the date of purchase or redemption of such shares by the
     Company or NPS Holdings from such holder;

                                      B-19
<PAGE>

     "Effective Date" means the date shown on the certificate of arrangement to
     be issued by the Director under the OBCA giving effect to the Arrangement;

     "Exchangeable Shares" means the non-voting exchangeable shares in the
     capital of the Company, having the rights, privileges, restrictions and
     conditions set forth herein;

     "Governmental Entity" means any (a) multinational, federal, provincial,
     state, regional, municipal, local or other government, governmental or
     public department, central bank, court, tribunal, arbitral body,
     commission, board, bureau or agency, domestic or foreign, (b) any
     subdivision, agent, commission, board, or authority of any of the
     foregoing, or (c) any quasi-governmental or private body exercising any
     regulatory, expropriation or taxing authority under or for the account of
     any of the foregoing;

     "holder" means, when used with reference to the Exchangeable Shares, the
     holders of Exchangeable Shares shown from time to time in the register
     maintained by or on behalf of the Company in respect of the Exchangeable
     Shares;

     "Liquidation Amount" has the meaning ascribed thereto in Section 5.1 of
     these share provisions;

     "Liquidation Call Right" has the meaning ascribed thereto in the Plan of
     Arrangement;

     "Liquidation Date" has the meaning ascribed thereto in Section 5.1 of these
     share provisions;

     "Nasdaq" means the National Association of Securities Dealers Automated
     Quotation System;

     "NPS" means NPS Pharmaceuticals, Inc.;

     "NPS Common Shares" mean the shares of common stock in the capital of NPS
     and any other securities into which such shares may be changed;

     "NPS Control Transaction" means any merger, amalgamation, tender offer,
     material sale of shares or rights or interests therein or thereto or
     similar transactions involving NPS, or any proposal to do so;

     "NPS Dividend Declaration Date" means the date on which the Board of
     Directors of NPS declares any dividend on the NPS Common Shares;

     "NPS Holdings" means NPS Holdings Company, an unlimited liability company
     formed under the Act as a wholly-owned subsidiary of NPS;

     "NPS Holdings Call Notice" has the meaning ascribed thereto in Section 6.3
     of these share provisions;

     "OBCA" means the Business Corporations Act (Ontario), as amended;

                                      B-20
<PAGE>

     "Person" includes any individual, firm, partnership, joint venture, venture
     capital fund, limited liability company, unlimited liability company,
     association, trust, trustee, executor, administrator, legal personal
     representative, estate, group, body corporate, corporation, unincorporated
     association or organization, Governmental Entity, syndicate or other
     entity, whether or not having legal status;

     "Plan of Arrangement" means the plan of arrangement substantially in the
     form and content of Schedule A annexed to the Arrangement Agreement and any
     amendments or variations thereto made in accordance with Section 9.1 of the
     Arrangement Agreement or Article 6 of the Plan of Arrangement or made at
     the direction of the Court in the Final Order;

     "Preference Shares" means the 100 preference shares in the capital of the
     Company;

     "Purchase Price" has the meaning ascribed thereto in Section 6.3 of these
     share provisions;

     "Redemption Call Purchase Price" has the meaning ascribed thereto in the
     Plan of Arrangement;

     "Redemption Call Right" has the meaning ascribed thereto in the Plan of
     Arrangement;

     "Redemption Date" means the date, if any, established by the Board of
     Directors for the redemption by the Company of all but not less than all of
     the outstanding Exchangeable Shares pursuant to Article 7 of these share
     provisions, which date shall be no earlier than December 31, 2004, unless:

     (a)  there are fewer than 1,000,000 Exchangeable Shares outstanding (other
          than Exchangeable Shares held by NPS and its affiliates, and as such
          number of shares may be adjusted as deemed appropriate by the Board of
          Directors to give effect to any subdivision or consolidation of or
          stock dividend on the Exchangeable Shares, any issue or distribution
          of rights to acquire Exchangeable Shares or securities exchangeable
          for or convertible into Exchangeable Shares, any issue or distribution
          of other securities or rights or evidences of indebtedness or assets,
          or any other capital reorganization or other transaction affecting the
          Exchangeable Shares), in which case the Board of Directors may
          accelerate such redemption date to such date prior to December 31,
          2004 as it may determine, upon at least 60 days' prior written notice
          to the registered holders of the Exchangeable Shares and the Trustee;

     (b)  a NPS Control Transaction occurs, in which case, provided that the
          Board of Directors determines, in good faith and in its sole
          discretion, that it is not reasonably practicable to substantially
          replicate the terms and conditions of the Exchangeable Shares in
          connection with such NPS Control Transaction and that the redemption
          of all but not less than all of the outstanding Exchangeable Shares is
          necessary to enable the completion of such NPS Control Transaction in
          accordance with its terms, the Board of Directors may accelerate such
          redemption date to such date prior to December 31, 2004 as it may
          determine, upon such

                                      B-21
<PAGE>

          number of days' prior written notice to the registered holders of the
          Exchangeable Shares and the Trustee as the Board of Directors may
          determine to be reasonably practicable in such circumstances;

     provided, however, that the accidental failure or omission to give any
     notice of redemption under clauses (a) or (b) above to less than 10% of
     such holders of Exchangeable Shares shall not affect the validity of any
     such redemption;

     "Redemption Price" has the meaning ascribed thereto in Section 7.1 of these
     share provisions;

     "Retracted Shares" has the meaning ascribed thereto in Section 6.1(a) of
     these share provisions;

     "Retraction Call Right" has the meaning ascribed thereto in Section 6.1(c)
     of these share provisions;

     "Retraction Date" has the meaning ascribed thereto in Section 6.1(b) of
     these share provisions;

     "Retraction Price" has the meaning ascribed thereto in Section 6.1 of these
     share provisions;

     "Retraction Request" has the meaning ascribed thereto in Section 6.1 of
     these share provisions;

     "Securities Act" means the Securities Act (Ontario) and the rules,
     regulations and policies made thereunder, as now in effect and as they may
     be amended from time to time prior to the Effective Date;

     "Support Agreement" means the agreement made among NPS, NPS Holdings and
     the Company in connection with the Plan of Arrangement;

     "Transfer Agent" means the transfer agent for the Exchangeable Shares;

     "Trustee" means the trustee chosen by NPS and Allelix, acting reasonably,
     to act as trustee under the Voting and Exchange Trust Agreement, being a
     corporation organized and existing under the laws of Canada and authorized
     to carry on the business of a trust company in all the provinces of Canada,
     and any successor trustee appointed under the Voting and Exchange Trust
     Agreement;

     "Voting and Exchange Trust Agreement" means the agreement made between NPS,
     the Company and the Trustee in connection with the Plan of Arrangement.

                                      B-22
<PAGE>

                                   ARTICLE 2
                        RANKING OF EXCHANGEABLE SHARES

2.1       The Exchangeable Shares shall be entitled to a preference over the
Common Shares and any other shares ranking junior to the Exchangeable Shares,
but shall rank junior to the Preference Shares, with respect to the payment of
dividends and the distribution of assets in the event of the liquidation,
dissolution or winding-up of the Company, whether voluntary or involuntary, or
any other distribution of the assets of the Company, among its shareholders for
the purpose of winding up its affairs.

                                   ARTICLE 3
                                   DIVIDENDS

3.1       A holder of an Exchangeable Share shall be entitled to receive and the
Board of Directors shall, subject to applicable law, on each NPS Dividend
Declaration Date, declare a dividend on each Exchangeable Share:

     (a)  in the case of a cash dividend declared on the NPS Common Shares, in
          an amount in cash for each Exchangeable Share in U.S. dollars, or the
          Canadian Dollar Equivalent thereof on the NPS Dividend Declaration
          Date, in each case, corresponding to the cash dividend declared on
          each NPS Common Share;

     (b)  in the case of a stock dividend declared on the NPS Common Shares to
          be paid in NPS Common Shares by the issue or transfer by the Company
          of such number of Exchangeable Shares for each Exchangeable Share as
          is equal to the number of NPS Common Shares to be paid on each NPS
          Common Share; or

     (c)  in the case of a dividend declared on the NPS Common Shares in
          property other than cash or NPS Common Shares, in such type and amount
          of property for each Exchangeable Share as is the same as or
          economically equivalent to (to be determined by the Board of Directors
          as contemplated by Section 3.5 hereof) the type and amount of property
          declared as a dividend on each NPS Common Share.

          Such dividends shall be paid out of money, assets or property of the
Company properly applicable to the payment of dividends, or out of authorized
but unissued shares of the Company, as applicable.

3.2       Cheques of the Company payable at par at any branch of the bankers of
the Company shall be issued in respect of any cash dividends contemplated by
Section 3.1 (a) hereof and the sending of such a cheque to each holder of an
Exchangeable Share shall satisfy the cash dividend represented thereby unless
the cheque is not paid on presentation. Certificates registered in the name of
the registered holder of Exchangeable Shares shall be issued or transferred in
respect of any stock dividends contemplated by Section 3.1 (b) hereof and the
sending of such a certificate to each holder of an Exchangeable Share shall
satisfy the stock dividend represented thereby. Such other type and amount of
property in respect of any dividends contemplated by Section 3.1 (c) hereof
shall be issued, distributed or transferred by the Company in such manner as it
shall determine and the issuance, distribution or transfer thereof

                                      B-23
<PAGE>

by the Company to each holder of an Exchangeable Share shall satisfy the
dividend represented thereby. No holder of an Exchangeable Share shall be
entitled to recover by action or other legal process against the Company any
dividend that is represented by a cheque that has not been duly presented to the
Company's bankers for payment or that otherwise remains unclaimed for a period
of six years from the date on which such dividend was payable.

3.3       The record date for the determination of the holders of Exchangeable
Shares entitled to receive payment of, and the payment date for, any dividend
declared on the Exchangeable Shares under Section 3.1 hereof shall be the same
dates as the record date and payment date, respectively, for the corresponding
dividend declared on the NPS Common Shares.

3.4       If on any payment date for any dividends declared on the Exchangeable
Shares under Section 3.1 hereof the dividends are not paid in full on all of the
Exchangeable Shares then outstanding, any such dividends that remain unpaid
shall be paid on a subsequent date or dates determined by the Board of Directors
on which the Company shall have sufficient money, assets or property properly
applicable to the payment of such dividends.

3.5       The Board of Directors shall determine, in good faith and in its sole
discretion, economic equivalence for the purposes of Section 3.1 hereof, and
each such determination shall be conclusive and binding on the Company and its
shareholders. In making each such determination, the following factors shall,
without excluding other factors determined by the Board of Directors to be
relevant, be considered by the Board of Directors:

     (a)  in the case of any stock dividend or other distribution payable in NPS
          Common Shares, the number of such shares issued in proportion to the
          number of NPS Common Shares previously outstanding;

     (b)  in the case of the issuance or distribution of any rights, options or
          warrants to subscribe for or purchase NPS Common Shares (or securities
          exchangeable for or convertible into or carrying rights to acquire NPS
          Common Shares), the relationship between the exercise price of each
          such right, option or warrant and the Current Market Price;

     (c)  in the case of the issuance or distribution of any other form of
          property (including without limitation any shares or securities of NPS
          of any class other than NPS Common Shares, any rights, options or
          warrants other than those referred to in Section 3.5(b) above, any
          evidences of indebtedness of NPS or any assets of NPS) the
          relationship between the fair market value (as determined by the Board
          of Directors in the manner above contemplated) of such property to be
          issued or distributed with respect to each outstanding NPS Common
          Share and the Current Market Price; and

     (d)  in all such cases, the general taxation consequences of the relevant
          event to holders of Exchangeable Shares to the extent that such
          consequences may differ from the taxation consequences to holders of
          NPS Common Shares as a result of differences between taxation laws of
          Canada and the United States (except for any

                                      B-24
<PAGE>

          differing consequences arising as a result of differing marginal
          taxation rates and without regard to the individual circumstances of
          holders of Exchangeable Shares).

                                   ARTICLE 4
                             CERTAIN RESTRICTIONS

4.1       So long as any of the Exchangeable Shares are outstanding, the Company
shall not at any time without, but may at any time with, the approval of the
holders of the Exchangeable Shares given as specified in Section 10.2 of these
share provisions:

     (a)  pay any dividends on the Common Shares or any other shares ranking
          junior to the Exchangeable Shares, other than stock dividends payable
          in Common Shares or any such other shares ranking junior to the
          Exchangeable Shares, as the case may be;

     (b)  redeem or purchase or make any capital distribution in respect of
          Common Shares or any other shares ranking junior to the Exchangeable
          Shares;

     (c)  redeem or purchase any other shares of the Company ranking equally
          with the Exchangeable Shares with respect to the payment of dividends
          or on any liquidation distribution; or

     (d)  except pursuant to and in accordance with the terms of the Allelix
          Options, the Allelix Warrants and the Allelix Preferred Shares, issue
          any Exchangeable Shares or any other shares of the Company ranking
          equally with, or superior to, the Exchangeable Shares other than by
          way of stock dividends to the holders of such Exchangeable Shares.

          The restrictions in Sections 4.1(a), (b), (c) and (d) above shall not
apply if all dividends on the outstanding Exchangeable Shares corresponding to
dividends declared and paid to date on the NPS Common Shares shall have been
declared and paid on the Exchangeable Shares.

                                   ARTICLE 5
                          DISTRIBUTION ON LIQUIDATION

5.1       In the event of the liquidation, dissolution or winding-up of the
Company or any other distribution of the assets of the Company among its
shareholders for the purpose of winding up its affairs, a holder of Exchangeable
Shares shall be entitled, subject to applicable law, to receive from the assets
of the Company in respect of each Exchangeable Share held by such holder on the
effective date (the "Liquidation Date") of such liquidation, dissolution or
winding-up, before any distribution of any part of the assets of the Company
among the holders of the Common Shares or any other shares ranking junior to the
Exchangeable Shares, an amount per share (the "Liquidation Amount") equal to the
Current Market Price of a NPS Common Share on the last Business Day prior to the
Liquidation Date, which shall be satisfied in full by the Company causing to be
delivered to such holder one NPS Common Share, plus the Dividend Amount.

                                      B-25
<PAGE>

5.2       On or promptly after the Liquidation Date, and subject to the exercise
by NPS Holdings of the Liquidation Call Right, the Company shall cause to be
delivered to the holders of the Exchangeable Shares the Liquidation Amount for
each such Exchangeable Share upon presentation and surrender of the certificates
representing such Exchangeable Shares, together with such other documents and
instruments as may be required to effect a transfer of Exchangeable Shares under
the Act and the Articles of the Company and such additional documents and
instruments as the Transfer Agent and the Company may reasonably require, at the
registered office of the Company or at any office of the Transfer Agent as may
be specified by the Company by notice to the holders of the Exchangeable Shares.
Payment of the total Liquidation Amount for such Exchangeable Shares shall be
made by delivery to each holder, at the address of the holder recorded in the
register of members of the Company for the Exchangeable Shares or by holding for
pick-up by the holder at the registered office of the Company or at any office
of the Transfer Agent as may be specified by the Company by notice to the
holders of Exchangeable Shares, on behalf of the Company of certificates
representing NPS Common Shares (which shares shall be duly issued as fully paid
and non-assessable and shall be free and clear of any lien, claim or
encumbrance) and a cheque of the Company payable at par at any branch of the
bankers of the Company in respect of the remaining portion, if any, of the total
Liquidation Amount (in each case less any amounts withheld on account of tax
required to be deducted and withheld therefrom). On and after the Liquidation
Date, the holders of the Exchangeable Shares shall cease to be holders of such
Exchangeable Shares and shall not be entitled to exercise any of the rights of
holders in respect thereof, other than the right to receive their proportionate
part of the total Liquidation Amount, unless payment of the total Liquidation
Amount for such Exchangeable Shares shall not be made upon presentation and
surrender of share certificates in accordance with the foregoing provisions, in
which case the rights of the holders shall remain unaffected until the total
Liquidation Amount has been paid in the manner hereinbefore provided. The
Company shall have the right at any time after the Liquidation Date to deposit
or cause to be deposited the total Liquidation Amount in respect of the
Exchangeable Shares represented by certificates that have not at the Liquidation
Date been surrendered by the holders thereof in a custodial account with any
chartered bank or trust company in Canada. Upon such deposit being made, the
rights of the holders of Exchangeable Shares after such deposit shall be limited
to receiving their proportionate part of the total Liquidation Amount (in each
case less any amounts withheld on account of tax required to be deducted and
withheld therefrom) for such Exchangeable Shares so deposited, against
presentation and surrender of the said certificates held by them, respectively,
in accordance with the foregoing provisions. Upon such payment or deposit of the
total Liquidation Amount, the holders of the Exchangeable Shares shall
thereafter be considered and deemed for all purposes to be holders of the NPS
Common Shares delivered to them or the custodian on their behalf.

5.3       After the Company has satisfied its obligations to pay the holders of
the Exchangeable Shares the Liquidation Amount per Exchangeable Share pursuant
to Section 5.1 of these share provisions, such holders shall not be entitled to
share in any further distribution of the assets of the Company.

                                      B-26
<PAGE>

                                   ARTICLE 6
                  RETRACTION OF EXCHANGEABLE SHARES BY HOLDER

6.1       A holder of Exchangeable Shares shall be entitled at any time, subject
to the exercise by NPS Holdings of the Retraction Call Right and otherwise upon
compliance with the provisions of this Article 6, to require the Company to
redeem any or all of the Exchangeable Shares registered in the name of such
holder for an amount per share equal to the Current Market Price of a NPS Common
Share on the last Business Day prior to the Retraction Date (the "Retraction
Price"), which shall be satisfied in full by the Company causing to be delivered
to such holder one NPS Common Share for each Exchangeable Share presented and
surrendered by the holder. To effect such redemption, the holder shall present
and surrender at the registered office of the Company or at any office of the
Transfer Agent as may be specified by the Company by notice to the holders of
Exchangeable Shares the certificate or certificates representing the
Exchangeable Shares which the holder desires to have the Company redeem,
together with such other documents and instruments as may be required to effect
a transfer of Exchangeable Shares under the Act and the Articles of the Company
and such additional documents and instruments as the Transfer Agent and the
Company may reasonably require, and together with a duly executed statement (the
"Retraction Request") in the form of Schedule A hereto or in such other form as
may be acceptable to the Company:

     (a)  specifying that the holder desires to have all or any number specified
          therein of the Exchangeable Shares represented by such certificate or
          certificates (the "Retracted Shares") redeemed by the Company;

     (b)  stating the Business Day on which the holder desires to have the
          Company redeem the Retracted Shares (the "Retraction Date"), provided
          that the Retraction Date shall be not less than 10 Business Days nor
          more than 15 Business Days after the date on which the Retraction
          Request is received by the Company and further provided that, in the
          event that no such Business Day is specified by the holder in the
          Retraction Request, the Retraction Date shall be deemed to be the 15th
          Business Day after the date on which the Retraction Request is
          received by the Company; and

     (c)  acknowledging the overriding right (the "Retraction Call Right") of
          NPS Holdings to purchase all but not less than all the Retracted
          Shares directly from the holder and that the Retraction Request shall
          be deemed to be a revocable offer by the holder to sell the Retracted
          Shares to NPS Holdings in accordance with the Retraction Call Right on
          the terms and conditions set out in Section 6.3 below.

6.2       Subject to the exercise by NPS Holdings of the Retraction Call Right,
upon receipt by the Company or the Transfer Agent in the manner specified in
Section 6.1 hereof of a certificate or certificates representing the number of
Retracted Shares, together with a Retraction Request, and provided that the
Retraction Request is not revoked by the holder in the manner specified in
Section 6.7, the Company shall redeem the Retracted Shares effective at the
close of business on the Retraction Date and shall cause to be delivered to such
holder the total Retraction Price. If only a part of the Exchangeable Shares
represented by any certificate is redeemed (or purchased by NPS Holdings
pursuant to the Retraction Call Right), a new certificate for the

                                      B-27
<PAGE>

balance of such Exchangeable Shares shall be issued to the holder at the expense
of the Company.

6.3       Upon receipt by the Company of a Retraction Request, the Company shall
immediately notify NPS Holdings thereof and shall provide to NPS Holdings a copy
of the Retraction Request.  In order to exercise the Retraction Call Right, NPS
Holdings must notify the Company of its determination to do so (the "NPS
Holdings Call Notice") within five Business Days of notification to NPS Holdings
by the Company of the receipt by the Company of the Retraction Request. If NPS
Holdings does not so notify the Company within such five Business Day period,
the Company will notify the holder as soon as possible thereafter that NPS
Holdings will not exercise the Retraction Call Right. If NPS Holdings delivers
the NPS Holdings Call Notice within such five Business Day period, and provided
that the Retraction Request is not revoked by the holder in the manner specified
in Section 6.7, the Retraction Request shall thereupon be considered only to be
an offer by the holder to sell the Retracted Shares to NPS Holdings in
accordance with the Retraction Call Right. In such event, the Company shall not
redeem the Retracted Shares and NPS Holdings shall purchase from such holder and
such holder shall sell to NPS Holdings on the Retraction Date the Retracted
Shares for a purchase price (the "Purchase Price") per share equal to the
Retraction Price per share, plus on the designated payment date therefor, to the
extent not paid by the Company on the designated payment date therefor, any
Dividend Amount.  To the extent that NPS Holdings pays the Dividend Amount in
respect of the Retracted Shares, the Company shall no longer be obligated to pay
any declared and unpaid dividends on such Retracted Shares.  Provided that NPS
Holdings has complied with Section 6.4, the closing of the purchase and sale of
the Retracted Shares pursuant to the Retraction Call Right shall be deemed to
have occurred as at the close of business on the Retraction Date and, for
greater certainty, no redemption by the Company of such Retracted Shares shall
take place on the Retraction Date. In the event that NPS Holdings does not
deliver a NPS Holdings Call Notice within such five Business Day period, and
provided that the Retraction Request is not revoked by the holder in the manner
specified in Section 6.7, the Company shall redeem the Retracted Shares on the
Retraction Date and in the manner otherwise contemplated in this Article 6.

6.4       The Company or NPS Holdings, as the case may be, shall deliver or
cause the Trustee to deliver to the relevant holder, at the address of the
holder recorded in the register of members of the Company for the Exchangeable
Shares or at the address specified in the holder's Retraction Request or by
holding for pick-up by the holder at the registered office of the Company or at
any office of the Transfer Agent as may be specified by the Company by notice to
the holders of Exchangeable Shares, certificates representing the NPS Common
Shares (which shares shall be duly issued as fully paid and non-assessable and
shall be free and clear of any lien, claim or encumbrance) registered in the
name of the holder or in such other name as the holder may request, and, if
applicable and on or before the payment date therefor, a cheque payable at par
at any branch of the bankers of the Company or NPS Holdings, as applicable,
representing the aggregate Dividend Amount, in payment of the total Retraction
Price or the total Purchase Price, as the case may be, in each case, less any
amounts withheld on account of tax required to be deducted and withheld
therefrom, and such delivery of such certificates and cheques on behalf of the
Company or by NPS Holdings, as the case may be, or by the Transfer Agent shall
be deemed to be payment of and shall satisfy and discharge all liability for the
total Retraction Price or total Purchase Price, as the case may be, to the
extent that the same is

                                      B-28
<PAGE>

represented by such share certificates and cheques (plus any tax deducted and
withheld therefrom and remitted to the proper tax authority).

6.5       On and after the close of business on the Retraction Date, the holder
of the Retracted Shares shall cease to be a holder of such Retracted Shares and
shall not be entitled to exercise any of the rights of a holder in respect
thereof, other than the right to receive his proportionate part of the total
Retraction Price or total Purchase Price, as the case may be, unless upon
presentation and surrender of certificates in accordance with the foregoing
provisions, payment of the total Retraction Price or the total Purchase Price,
as the case may be, shall not be made as provided in Section 6.4, in which case
the rights of such holder shall remain unaffected until the total Retraction
Price or the total Purchase Price, as the case may be, has been paid in the
manner hereinbefore provided. On and after the close of business on the
Retraction Date, provided that presentation and surrender of certificates and
payment of the total Retraction Price or the total Purchase Price, as the case
may be, has been made in accordance with the foregoing provisions, the holder of
the Retracted Shares so redeemed by the Company or purchased by NPS Holdings
shall thereafter be considered and deemed for all purposes to be a holder of the
NPS Common Shares delivered to it.

6.6       Notwithstanding any other provision of this Article 6, the Company
shall not be obligated to redeem Retracted Shares specified by a holder in a
Retraction Request to the extent that such redemption of Retracted Shares would
be contrary to solvency requirements or other provisions of applicable law. If
the Company believes that on any Retraction Date it would not be permitted by
any of such provisions to redeem the Retracted Shares tendered for redemption on
such date, and provided that NPS Holdings shall not have exercised the
Retraction Call Right with respect to the Retracted Shares, the Company shall
only be obligated to redeem Retracted Shares specified by a holder in a
Retraction Request to the extent of the maximum number that may be so redeemed
(rounded down to a whole number of shares) as would not be contrary to such
provisions and shall notify the holder at least two Business Days prior to the
Retraction Date as to the number of Retracted Shares which will not be redeemed
by the Company. In any case in which the redemption by the Company of Retracted
Shares would be contrary to solvency requirements or other provisions of
applicable law, the Company shall redeem Retracted Shares in accordance with
Section 6.2 of these share provisions on a pro rata basis and shall issue to
each holder of Retracted Shares a new certificate, at the expense of the
Company, representing the Retracted Shares not redeemed by the Company pursuant
to Section 6.2 hereof. Provided that the Retraction Request is not revoked by
the holder in the manner specified in Section 6.7, the holder of any such
Retracted Shares not redeemed by the Company pursuant to Section 6.2 of these
share provisions as a result of solvency requirements or other provisions of
applicable law shall be deemed by giving the Retraction Request to require NPS
to purchase such Retracted Shares from such holder on the Retraction Date or as
soon as practicable thereafter on payment by NPS to such holder of the Purchase
Price for each such Retracted Share, all as more specifically provided in the
Voting and Exchange Trust Agreement.

6.7       A holder of Retracted Shares may, by notice in writing given by the
holder to the Company before the close of business on the Business Day
immediately preceding the Retraction Date, withdraw its Retraction Request, in
which event such Retraction Request shall be null and void and, for greater
certainty, the revocable offer constituted by the Retraction Request to sell the
Retracted Shares to NPS Holdings shall be deemed to have been revoked.

                                      B-29
<PAGE>

                                   ARTICLE 7
               REDEMPTION OF EXCHANGEABLE SHARES BY THE COMPANY

7.1       Subject to applicable law, and provided NPS Holdings has not exercised
the Redemption Call Right, the Company shall on the Redemption Date redeem all
but not less than all of the then outstanding Exchangeable Shares for an amount
per share equal to the Current Market Price of a NPS Common Share on the last
Business Day prior to the Redemption Date (the "Redemption Price"), which shall
be satisfied in full by the Company causing to be delivered to each holder of
Exchangeable Shares one NPS Common Share for each Exchangeable Share held by
such holder, together with the Dividend Amount.

7.2       In any case of a redemption of Exchangeable Shares under this Article
7, the Company shall, at least 60 days before the Redemption Date (other than a
Redemption Date established in connection with a NPS Control Transaction, send
or cause to be sent to each holder of Exchangeable Shares a notice in writing of
the redemption by the Company or the purchase by NPS Holdings under the
Redemption Call Right, as the case may be, of the Exchangeable Shares held by
such holder. In the case of a Redemption Date established in connection with a
NPS Control Transaction, an Exchangeable Share Voting Event or an Exempt
Exchangeable Share Voting Event, the written notice of redemption by the Company
or the purchase by NPS Holdings under the Redemption Call Right will be sent on
or before the Redemption Date, on as many days prior written notice as may be
determined by the Board of Directors of the Company to be reasonably practicable
in the circumstances. In any such case, such notice shall set out the formula
for determining the Redemption Price or the Redemption Call Purchase Price, as
the case may be, the Redemption Date and, if applicable, particulars of the
Redemption Call Right.

7.3       On or after the Redemption Date and subject to the exercise by NPS
Holdings of the Redemption Call Right, the Company shall cause to be delivered
to the holders of the Exchangeable Shares to be redeemed the Redemption Price
for each such Exchangeable Share, together with the Dividend Amount upon
presentation and surrender at the registered office of the Company or at any
office of the Trustee as may be specified by the Company in such notice of the
certificates representing such Exchangeable Shares, together with such other
documents and instruments as may be required to effect a transfer of
Exchangeable Shares under the Act and the Articles of the Company and such
additional documents and instruments as the Transfer Agent and the Company may
reasonably require. Payment of the total Redemption Price for such Exchangeable
Shares, together with payment of the Dividend Amount, shall be made by delivery
to each holder, at the address of the holder recorded in the register of members
of the Company or by holding for pick-up by the holder at the registered office
of the Company or at any office of the Transfer Agent as may be specified by the
Company in such notice, on behalf of the Company of certificates representing
NPS Common Shares (which shares shall be duly issued as fully paid and non-
assessable and shall be free and clear of any lien, claim or encumbrance) and,
if applicable, a cheque of the Company payable at par at any branch of the
bankers of the Company in payment of any Dividend Amounts, in each case, less
any amounts withheld on account of tax required to be deducted and withheld
therefrom. On and after the Redemption Date, the holders of the Exchangeable
Shares called for redemption shall cease to be holders of such Exchangeable
Shares and shall not be entitled to exercise any of the rights of holders in
respect thereof, other than the right to receive their proportionate part of the
total Redemption

                                      B-30
<PAGE>

Price and any Dividend Amount, unless payment of the total Redemption Price and
any Dividend Amount for such Exchangeable Shares shall not be made upon
presentation and surrender of certificates in accordance with the foregoing
provisions, in which case the rights of the holders shall remain unaffected
until the total Redemption Price and any Dividend Amount shall have been paid in
the manner hereinbefore provided. The Company shall have the right at any time
after the sending of notice of its intention to redeem the Exchangeable Shares
as aforesaid to deposit or cause to be deposited the total Redemption Price for
and the full amount of the Dividend Amount on (except as otherwise provided in
this Section 7.3) the Exchangeable Shares so called for redemption, or of such
of the said Exchangeable Shares represented by certificates that have not at the
date of such deposit been surrendered by the holders thereof in connection with
such redemption, in a custodial account with any chartered bank or trust company
in Canada named in such notice, less any amounts withheld on account of tax
required to be deducted and withheld therefrom. Upon the later of such deposit
being made and the Redemption Date, the Exchangeable Shares in respect whereof
such deposit shall have been made shall be redeemed and the rights of the
holders thereof after such deposit or Redemption Date, as the case may be, shall
be limited to receiving their proportionate part of the total Redemption Price
and the Dividend Amount for such Exchangeable Shares so deposited, against
presentation and surrender of the said certificates held by them, respectively,
in accordance with the foregoing provisions. Upon such payment or deposit of the
total Redemption Price and the full Dividend Amount, the holders of the
Exchangeable Shares shall thereafter be considered and deemed for all purposes
to be holders of the NPS Common Shares delivered to them or the custodian on
their behalf.

                                   ARTICLE 8
                           PURCHASE FOR CANCELLATION

8.1       Subject to applicable law, the Company may at any time and from time
to time purchase for cancellation all or any part of the outstanding
Exchangeable Shares at any price by tender to all the holders of record of
Exchangeable Shares then outstanding or through the facilities of any stock
exchange on which the Exchangeable Shares are listed or quoted at any price per
share. If in response to an invitation for tenders under the provisions of this
Section 8.1, more Exchangeable Shares are tendered at a price or prices
acceptable to the Company than the Company is prepared to purchase, the
Exchangeable Shares to be purchased by the Company shall be purchased as nearly
as may be pro rata according to the number of shares tendered by each holder who
submits a tender to the Company, provided that when shares are tendered at
different prices, the pro rating shall be effected (disregarding fractions) only
with respect to the shares tendered at the price at which more shares were
tendered than the Company is prepared to purchase after the Company has
purchased all the shares tendered at lower prices. If part only of the
Exchangeable Shares represented by any certificate shall be purchased, a new
certificate for the balance of such shares shall be issued at the expense of the
Company.

                                   ARTICLE 9
                                 VOTING RIGHTS

9.1       Except as required by applicable law and by Article 10 hereof, the
holders of the Exchangeable Shares shall not be entitled as such to receive
notice of or to attend any meeting of the Shareholders of the Company or to vote
at any such meeting.

                                      B-31
<PAGE>

                                  ARTICLE 10
                            AMENDMENT AND APPROVAL

10.1      The rights, privileges, restrictions and conditions attaching to the
Exchangeable Shares may be added to, changed or removed but only with the
approval of the holders of the Exchangeable Shares given as hereinafter
specified.

10.2      Any approval given by the holders of the Exchangeable Shares to add
to, change or remove any right, privilege, restriction or condition attaching to
the Exchangeable Shares or any other matter requiring the approval or consent of
the holders of the Exchangeable Shares shall be deemed to have been sufficiently
given if it shall have been given in accordance with applicable law subject to a
minimum requirement that such approval be evidenced by resolution passed by not
less than two-thirds of the votes cast on such resolution at a meeting of
holders of Exchangeable Shares duly called and held at which the holders of at
least 10% of the outstanding Exchangeable Shares at that time are present or
represented by proxy; provided that if at any such meeting the holders of at
least 10% of the outstanding Exchangeable Shares at that time are not present or
represented by proxy within one-half hour after the time appointed for such
meeting, then the meeting shall be adjourned to such date not less than five
days thereafter and to such time and place as may be designated by the Chairman
of such meeting. At such adjourned meeting the holders of Exchangeable Shares
present or represented by proxy thereat may transact the business for which the
meeting was originally called and a resolution passed thereat by the affirmative
vote of not less than two-thirds of the votes cast on such resolution at such
meeting shall constitute the approval or consent of the holders of the
Exchangeable Shares.

                                  ARTICLE 11
           RECIPROCAL CHANGES, ETC. IN RESPECT OF NPS COMMON SHARES

11.1      Each holder of an Exchangeable Share acknowledges that the Support
Agreement provides, in part, that NPS will not without the prior approval of the
Company and the prior approval of the holders of the Exchangeable Shares given
in accordance with Section 10.2 of these share provisions:

     (a)  issue or distribute NPS Common Shares (or securities exchangeable for
          or convertible into or carrying rights to acquire NPS Common Shares)
          to the holders of all or substantially all of the then outstanding NPS
          Common Shares by way of stock dividend or other distribution, other
          than an issue of NPS Common Shares (or securities exchangeable for or
          convertible into or carrying rights to acquire NPS Common Shares) to
          holders of NPS Common Shares who exercise an option to receive
          dividends in NPS Common Shares (or securities exchangeable for or
          convertible into or carrying rights to acquire NPS Common Shares) in
          lieu of receiving cash dividends;

     (b)  issue or distribute rights, options or warrants to the holders of all
          or substantially all of the then outstanding NPS Common Shares
          entitling them to subscribe for or to purchase NPS Common Shares (or
          securities exchangeable for or convertible into or carrying rights to
          acquire NPS Common Shares); or

                                      B-32
<PAGE>

     (c)  issue or distribute to the holders of all or substantially all of the
          then outstanding NPS Common Shares:

          (i)   shares or securities of NPS of any class other than NPS Common
                Shares (other than shares convertible into or exchangeable for
                or carrying rights to acquire NPS Common Shares);

          (ii)  rights, options or warrants other than those referred to in
                Section 11.1(b) above;

          (iii) evidences of indebtedness of NPS; or

          (iv)  assets of NPS,

unless the economic equivalent on a per share basis of such rights, options,
securities, shares, evidences of indebtedness or other assets is issued or
distributed simultaneously to holders of the Exchangeable Shares.

11.2      Each holder of an Exchangeable Share acknowledges that the Support
Agreement further provides, in part, that NPS will not without the prior
approval of the Company and the prior approval of the holders of the
Exchangeable Shares given in accordance with Section 10.2 of these share
provisions:

     (a)  subdivide, redivide or change the then outstanding NPS Common Shares
          into a greater number of NPS Common Shares;

     (b)  reduce, combine, consolidate or change the then outstanding NPS Common
          Shares into a lesser number of NPS Common Shares; or

     (c)  reclassify or otherwise change the NPS Common Shares or effect an
          amalgamation, merger, reorganization or other transaction affecting
          the NPS Common Shares,

unless the same or an economically equivalent change shall simultaneously be
made to, or in, the rights of the holders of the Exchangeable Shares. The
Support Agreement further provides, in part, that the aforesaid provisions of
the Support Agreement shall not be changed without the approval of the holders
of the Exchangeable Shares given in accordance with Section 10.2 of these share
provisions.

                                  ARTICLE 12
                ACTIONS BY THE COMPANY UNDER SUPPORT AGREEMENT

12.1      The Company will take all such actions and do all such things as shall
be necessary or advisable to perform and comply with and to ensure performance
and compliance by NPS, NPS Holdings and the Company with all provisions of the
Support Agreement applicable to NPS, NPS Holdings and the Company, respectively,
in accordance with the terms thereof including, without limitation, taking all
such actions and doing all such things as shall be

                                      B-33
<PAGE>

necessary or advisable to enforce to the fullest extent possible for the direct
benefit of the Company all rights and benefits in favour of the Company under or
pursuant to such agreement.

12.2      The Company shall not propose, agree to or otherwise give effect to
any amendment to, or waiver or forgiveness of its rights or obligations under,
the Support Agreement without the approval of the holders of the Exchangeable
Shares given in accordance with Section 10.2 of these share provisions other
than such amendments, waivers and/or forgiveness as may be necessary or
advisable for the purposes of:

     (a)  adding to the covenants of the other parties to such agreement for the
          protection of the Company or the holders of the Exchangeable Shares
          thereunder;

     (b)  making such provisions or modifications not inconsistent with such
          agreement as may be necessary or desirable with respect to matters or
          questions arising thereunder which, in the good faith opinion of the
          Board of Directors, it may be expedient to make, provided that the
          Board of Directors shall be of the good faith opinion, after
          consultation with counsel, that such provisions and modifications will
          not be prejudicial to the interests of the holders of the Exchangeable
          Shares; or

     (c)  making such changes in or corrections to such agreement which, on the
          advice of counsel to the Company, are required for the purpose of
          curing or correcting any ambiguity or defect or inconsistent provision
          or clerical omission or mistake or manifest error contained therein,
          provided that the Board of Directors shall be of the good faith
          opinion, after consultation with counsel, that such changes or
          corrections will not be prejudicial to the interests of the holders of
          the Exchangeable Shares.


                                  ARTICLE 13
                    LEGEND; CALL RIGHTS; WITHHOLDING RIGHTS

13.1      The certificates evidencing the Exchangeable Shares shall contain or
have affixed thereto a legend in form and on terms approved by the Board of
Directors, with respect to the Support Agreement, the provisions of the Plan of
Arrangement relating to the Liquidation Call Right and the Redemption Call
Right, and the Voting and Exchange Trust Agreement (including the provisions
with respect to the voting rights, exchange right and automatic exchange
thereunder).

13.2      Each holder of an Exchangeable Share, whether of record or beneficial,
by virtue of becoming and being such a holder shall be deemed to acknowledge
each of the Liquidation Call Right, the Retraction Call Right and the Redemption
Call Right, in each case, in favour of NPS Holdings, and the overriding nature
thereof in connection with the liquidation, dissolution or winding-up of the
Company or the retraction or redemption of Exchangeable Shares, as the case may
be, and to be bound thereby in favour of NPS Holdings as therein provided.

13.3      The Company, NPS Holdings, NPS and the Trustee shall be entitled to
deduct and withhold from any dividend or consideration otherwise payable to any
holder of Exchangeable Shares such amounts as the Company, NPS Holdings, NPS or
the Trustee is required or

                                      B-34
<PAGE>

permitted to deduct and withhold with respect to such payment under the Income
Tax Act (Canada), the United States Internal Revenue Code of 1986 or any
provision of provincial, state, local or foreign tax law, in each case, as
amended. To the extent that amounts are so withheld, such withheld amounts shall
be treated for all purposes hereof as having been paid to the holder of the
shares in respect of which such deduction and withholding was made, provided
that such withheld amounts are actually remitted to the appropriate taxing
authority. To the extent that the amount so required or permitted to be deducted
or withheld from any payment to a holder exceeds the cash portion of the
consideration otherwise payable to the holder, the Company, NPS Holdings, NPS
and the Trustee are hereby authorized to sell or otherwise dispose of such
portion of the consideration as is necessary to provide sufficient funds to the
Company, NPS Holdings, NPS or the Trustee, as the case may be, to enable it to
comply with such deduction or withholding requirement and the Company, NPS
Holdings, NPS or the Trustee shall notify the holder thereof and remit any
unapplied balance of the net proceeds of such sale.

                                  ARTICLE 14
                                    NOTICES

14.1      Any notice, request or other communication to be given to the Company
by a holder of Exchangeable Shares shall be in writing and shall be valid and
effective if given by mail (postage prepaid) or by telecopy or by delivery to
the registered office of the Company and addressed to the attention of the
President of the Company. Any such notice, request or other communication, if
given by mail, telecopy or delivery, shall only be deemed to have been given and
received upon actual receipt thereof by the Company.

14.2      Any presentation and surrender by a holder of Exchangeable Shares to
the Company or the Trustee of certificates representing Exchangeable Shares in
connection with the liquidation, dissolution or winding-up of the Company or the
retraction or redemption of Exchangeable Shares shall be made by registered mail
(postage prepaid) or by delivery to the registered office of the Company or to
such office of the Trustee as may be specified by the Company, in each case,
addressed to the attention of the President of the Company. Any such
presentation and surrender of certificates shall only be deemed to have been
made and to be effective upon actual receipt thereof by the Company or the
Trustee, as the case may be. Any such presentation and surrender of certificates
made by registered mail shall be at the sole risk of the holder mailing the
same.

14.3      Any notice, request or other communication to be given to a holder of
Exchangeable Shares by or on behalf of the Company shall be in writing and shall
be valid and effective if given by mail (postage prepaid) or by delivery to the
address of the holder recorded in the register of members of the Company or, in
the event of the address of any such holder not being so recorded, then at the
last known address of such holder. Any such notice, request or other
communication, if given by mail, shall be deemed to have been given and received
on the third Business Day following the date of mailing and, if given by
delivery, shall be deemed to have been given and received on the date of
delivery. Accidental failure or omission to give any notice, request or other
communication to one or more holders of Exchangeable Shares shall not invalidate
or otherwise alter or affect any action or proceeding to be taken by the Company
pursuant thereto.

                                      B-35
<PAGE>

                                   SCHEDULE A

                               RETRACTION REQUEST

[TO BE PRINTED ON EXCHANGEABLE SHARE CERTIFICATES]

To NPS Allelix Inc. ("NPS Allelix Inc.") and NPS Holdings Company ("NPS
Holdings")

      This notice is given pursuant to Article 6 of the provisions (the "Share
Provisions") attaching to the Exchangeable Shares of NPS Allelix Inc.
represented by this certificate and all capitalized words and expressions used
in this notice that are defined in the Share Provisions have the meanings
ascribed to such words and expressions in such Share Provisions.

      The undersigned hereby notifies NPS Allelix Inc. that, subject to the
Retraction Call Right referred to below, the undersigned desires to have NPS
Allelix Inc. redeem in accordance with Article 6 of the Share Provisions:

      [_]  all share(s) represented by this certificate; or

      [_]  __________________ share(s) only represented by this certificate.

      The undersigned hereby notifies NPS Allelix Inc. that the Retraction Date
shall be __________________.

NOTE: The Retraction Date must be a Business Day and must not be less than 10
      Business Days nor more than 15 Business Days after the date upon which
      this notice is received by NPS Allelix Inc.. If no such Business Day is
      specified above, the Retraction Date shall be deemed to be the 15th
      Business Day after the date on which this notice is received by NPS
      Allelix Inc.

      The undersigned acknowledges the overriding Retraction Call Right of NPS
Holdings to purchase all but not less than all the Retracted Shares from the
undersigned and that this notice is and shall be deemed to be a revocable offer
by the undersigned to sell the Retracted Shares to NPS Holdings in accordance
with the Retraction Call Right on the Retraction Date for the Purchase Price and
on the other terms and conditions set out in Section 6.3 of the Share
Provisions. This Retraction Request, and this offer to sell the Retracted Shares
to NPS Holdings, may be revoked and withdrawn by the undersigned only by notice
in writing given to NPS Allelix Inc. at any time before the close of business on
the Business Day immediately preceding the Retraction Date.

      The undersigned acknowledges that if, as a result of solvency provisions
of applicable law, NPS Allelix Inc. is unable to redeem all Retracted Shares,
the undersigned will be deemed to have exercised the Exchange Right (as defined
in the Voting and Exchange Trust Agreement) so as to require NPS to purchase the
unredeemed Retracted Shares.

      The undersigned hereby represents and warrants to NPS Holdings and NPS
Allelix Inc. that the undersigned:

                                      B-36
<PAGE>

      [_] is

          (select one)

      [_] is not

a non-resident of Canada for purposes of the Income Tax Act (Canada).  The
undersigned acknowledges that in the absence of an indication that the
undersigned is not a non-resident of Canada, withholding on account of Canadian
tax may be made from amounts payable to the undersigned on the redemption or
purchase of the Retracted Shares.

      The undersigned hereby represents and warrants to NPS Holdings and NPS
Allelix Inc. that the undersigned has good title to, and owns, the share(s)
represented by this certificate to be acquired by NPS Holdings or NPS Allelix
Inc., as the case may be, free and clear of all liens, claims and encumbrances.

______      _________________________________  ________________________________
(Date)      (Signature of Shareholder)             (Guarantee of Signature)

[_]    Please check box if the securities and any cheque(s) resulting from the
    retraction or purchase of the Retracted Shares are to be held for pick-up by
    the shareholder from the transfer agent acting in its capacity as trustee
    under the Voting and Exchange Trust Agreement (the "Transfer Agent"),
    failing which the securities and any cheque(s) will be mailed to the last
    address of the shareholder as it appears on the register.

NOTE: This panel must be completed and this certificate, together with such
      additional documents as the Transfer Agent may require, must be deposited
      with the Transfer Agent. The securities and any cheque(s) resulting from
      the retraction or purchase of the Retracted Shares will be issued and
      registered in, and made payable to, respectively, the name of the
      shareholder as it appears on the register of NPS Allelix Inc. and the
      securities and any cheque(s) resulting from such retraction or purchase
      will be delivered to such shareholder as indicated above, unless the form
      appearing immediately below is duly completed.


Date:_______________________

                                      B-37
<PAGE>

Name of Person in Whose Name Securities or Cheque(s)
Are to be Registered, Issued or Delivered (please print):___________________


Street Address or P.O. Box:_____________________________________________________


Signature of Shareholder:___________________________________________________


City, Province and Postal Code:_____________________________________________


Signature Guaranteed by:____________________________________________________

NOTE: If this Retraction Request is for less than all of the shares represented
      by this certificate, a certificate representing the remaining share(s) of
      NPS Allelix Inc. represented by this certificate will be issued and
      registered in the name of the shareholder as it appears on the register of
      NPS Allelix Inc., unless the Share Transfer Power on the share certificate
      is duly completed in respect of such share(s).

                                      B-38
<PAGE>

                                  APPENDIX II
                           TO THE PLAN OF ARRANGEMENT

                          PROVISIONS ATTACHING TO THE
                  ALLELIX PREFERRED SHARE, SERIES 1 SHARES OF
                        ALLELIX BIOPHARMACEUTICALS INC.


     The first series of Preferred Shares shall consist of One Thousand (1,000)
Preferred Shares which shall be designated as Preferred Share, Series 1 shares
(the "Series 1 Shares") and shall, in addition to and subject to the rights,
privileges, restrictions and conditions attaching to the Preferred Shares as a
class, have attached thereto and be subject to the rights, privileges,
restrictions and conditions as set forth below (collectively, the "Series 1
Share Provisions"):

1.   Exchange of Series 1 Shares.
     ---------------------------

     (a)  Each Series 1 Share shall automatically be exchanged for fully paid
          and non-assessable common shares in the capital of NPS
          Pharmaceuticals, Inc. ("NPS Common Shares") at the Exchange Rate (as
          defined below), on April 30, 2000 (the "Exchange Date") and each
          Series 1 Share shall have a value of U.S.$2,000 (the "Stated Value")
          for the purpose of such exchange.

     (b)  For purposes hereof, the following terms have the following meanings:

          (i)   "Current Market Price" means, in respect of a NPS Common Share
                on any date, the average of the closing bid and ask prices of
                NPS Common Shares during a period of 20 consecutive trading days
                ending not more than three trading days before such date on the
                NASDAQ Stock Market, or, if the NPS Common Shares are not then
                quoted on the NASDAQ Stock Market, on such other stock exchange
                or automated quotation system on which the NPS Common Shares are
                listed or quoted, as the case may be, as may be selected by the
                board of directors of the Corporation for such purpose; provided
                however, that if in the opinion of the board of directors of the
                Corporation the public distribution or trading activity of NPS
                Common Shares during such period does not create a market which
                reflects the fair market value of a NPS Common Share, then the
                Current Market Price of a NPS Common Share shall be determined
                by the board of directors of the Corporation, in good faith and
                in its sole discretion, and provided further that any such
                selection, opinion or determination by the board of directors of
                the Corporation shall be conclusive and binding;

          (ii)  "Exchange Price" means 80% of the Current Market Price of the
                NPS Common Shares, provided that if the Exchange Price is (i)
                greater than US$27.79 then the Exchange Price shall be US$27.79
                or (iii) less than United States Dollar Equivalent of Cdn.$10.38
                (the "Floor Price"),

                                     B-39
<PAGE>

                then the Exchange Price shall be the United States Dollar
                Equivalent of the Floor Price;

          (iii) "Exchange Rate" means the number of NPS Common Shares per Series
                1 Share to be issued upon exchange of each Series 1 Share, which
                number shall be equal to the amount determined by dividing the
                Stated Value by the Exchange Price, rounded to nearest
                1/10,000/th/; and

          (iv)  "United States Dollar Equivalent" means, in respect of the Floor
                Price, the product obtained by multiplying (a) the Floor Price
                by (b) the average noon buying rate in the City of New York for
                cable transfers in Canadian dollars stated in United States
                dollars as certified for customs purposes for the twenty (20)
                business days preceding the Exchange Date.

     (c)  The aggregate number of NPS Common Shares issuable to a holder of
          Series 1 Shares on the exchange of the Series 1 Shares shall be
          rounded down to the nearest whole number. The Corporation shall not
          deliver any fraction of a NPS Common Share upon the exchange of the
          Series 1 Shares or pay any cash in lieu therefor.

     (d)  In the event the NPS Common Shares are at any time subdivided,
          consolidated or changed into a greater or lesser number of shares of
          the same or another class or series, an appropriate adjustment shall
          be made to the method for determining the Exchange Price so as to
          maintain the relative rights of the holders of Series 1 Shares.

     (e)  Whenever the Exchange Price shall be adjusted pursuant to this Section
          1, the Corporation shall forthwith deliver to the holders of Series 1
          Shares a certificate signed by an officer of the Corporation, setting
          forth in reasonable detail the event requiring the adjustment and the
          method by which such adjustment was calculated and specifying the new
          Exchange Price terms.

2.   Exchange Procedure.
     ------------------

     (a)  Upon exchange, the Corporation shall send a written notice to each
          registered holder of Series 1 Shares setting out the Exchange Date,
          Exchange Rate, Exchange Price and the number of NPS Common Shares to
          which such holder is entitled. On presentation and surrender to the
          Corporation (or at any office or agency maintained for the transfer of
          the Series 1 Shares) of the certificates representing Series 1 Shares
          so exchanged, duly endorsed in blank for transfer or accompanied by
          proper instruments of assignment or transfer in blank (a "Holder
          Exchange Notice"), with signatures guaranteed where required, the
          holder of such Series 1 Shares shall be entitled, subject to the
          limitations herein contained, to receive in exchange therefor the
          certificates representing the NPS Common Shares to which such holder
          is entitled, which certificates shall be delivered by the second
          trading day after the date of delivery of the

                                     B-40
<PAGE>

          Holder Exchange Notice. A holder of Series 1 Shares shall be deemed to
          have become the holder of record of the NPS Common Shares to which
          such holder is entitled, for all purposes, as of the date of delivery
          of the Holder Exchange Notice.

     (b)  From and after the Exchange Date the Series 1 Shares shall be and be
          deemed to have been exchanged and a holder thereof shall cease to be
          entitled to any participation in the assets of the Corporation and
          shall not be entitled to exercise any of such holder's other rights as
          a shareholder in respect thereof, except to receive the certificates
          representing the NPS Common Shares to which such holder is entitled.

     (c)  The Corporation shall pay any and all taxes which may be imposed upon
          it with respect to the issuance and delivery of NPS Common Shares upon
          the exchange of the Series 1 Shares as herein provided.

3.   Voting Rights.  Subject to the Business Corporations Act (Ontario) and
     -------------
     except as otherwise provided in Section 6 below, the holders of Series 1
     Shares shall not, as such, be entitled to receive notice of or to attend
     any meeting of the shareholders of the Corporation or to vote at any such
     meeting.

4.   Liquidation, Dissolution, Winding Up.  In the event of the liquidation,
     ------------------------------------
     dissolution or winding up of the Corporation, whether voluntary or
     involuntary, or any other distribution of the assets of the Corporation
     among its shareholders for the purpose of winding up its affairs, the
     holders of the Series 1 Shares shall be entitled to receive in cash out of
     the assets of the Corporation, whether from capital or from earnings,
     available for distribution to its shareholders (the "Series 1 Funds"),
     before any amount shall be paid to the holders of Common Shares, an amount
     equal to the Stated Value per Series 1 Share, provided that, if the Series
     1 Funds are not sufficient to pay the full amount due to the holders of
     Series 1 Shares and holders of other classes or series of preferred shares
     of the Corporation that are equal in rank with the Series 1 Shares as to
     payments of Series 1 Funds (the "Pari Passu Shares"), then each holder of
     Series 1 Shares and Pari Passu Shares shall share rateably in any
     distribution of the Corporation's assets in proportion to the respective
     amounts that would have been payable if such Funds were sufficient to
     permit payment in full of all such amounts. The purchase or redemption by
     the Corporation of shares of any class, in any manner permitted by law,
     shall not, for the purposes hereof, be regarded as liquidation, dissolution
     or winding up of the Corporation. Neither the consolidation nor merger of
     the Corporation with or into any other corporation or corporations, nor the
     sale or transfer by the Corporation of less than substantially all of its
     assets, shall, for the purposes hereof, be deemed to be a liquidation,
     dissolution or winding up of the Corporation, provided that such merger,
     sale or transfer does not amend, alter or change the preferences or rights
     of the Series 1 Shares or the qualifications or limits thereof in a manner
     that adversely affects the Series 1 Shares. No holder of Series 1 Shares
     shall be entitled to receive any amounts with respect thereto upon any
     liquidation, dissolution or winding up of the Corporation other than the
     amounts provided for herein.

                                     B-41
<PAGE>

5.   Series 1 Rank.  All Common Shares shall be of junior rank to all Series 1
     -------------
     Shares in respect to the preferences as to distributions and payments upon
     the liquidation, dissolution or winding up of the Corporation. The rights
     of the Common Shares shall be subject to the preferences and relative
     rights of the Series 1 Shares. The Corporation may authorize and issue
     additional or other preferred shares which are of equal rank with the
     Series 1 Shares in respect of the preferences as to distributions and
     payments upon the liquidation, dissolution or winding up of the
     Corporation. In the event of the merger or consolidation of the Corporation
     with or into another corporation, the Series 1 Shares shall maintain their
     relative powers, designations and preferences provided herein.

6.   Vote to Change the Terms of Series 1 Shares.  The affirmative vote at a
     -------------------------------------------
     meeting duly called for such purpose or the written consent without a
     meeting of the holders of the not less than two-thirds of the then
     outstanding Series 1 Shares shall be required to (a) amend, alter, change
     or repeal any of the Series 1 Share Provisions, (b) authorize, create, or
     issue any new class or series of shares or any other securities convertible
     into equity securities of the Corporation having a preference over the
     Series 1 Shares with respect to redemptions or upon liquidation or
     dissolution of the Corporation, or (c) reclassify the Common Shares or any
     other capital of junior rank to the Series 1 Shares into shares of any
     class or series of capital (i) ranking either as to payment or distribution
     of assets or redemptions, prior to or on parity with the Series 1 Shares,
     or (ii) which in any manner adversely affects the holders of Series 1
     Shares.

7.   Amendments Upon Exchange of Outstanding Series 1 Shares. Upon exchange, the
     -------------------------------------------------------
     Series 1 Shares shall be cancelled and the board of directors of the
     Corporation may, at its discretion and without a vote of the shareholders
     of the Corporation, withdraw this designation in its entirety by providing
     for the filing of the applicable amendment of the Corporation's Articles of
     Incorporation, and the Series 1 Shares designated hereby shall thereby
     return to the status of authorized but unissued and undesignated preferred
     shares of the Corporation.

8.   Business Day.  In the event that any date upon which any action by the
     ------------
     Corporation or a holder of Series 1 Shares hereunder, is not a business day
     (being any day of the year, other than a Saturday, Sunday or any day on
     which banks are required or are authorized to close in Toronto, Ontario),
     then such action shall be required to be taken on the next succeeding
     business day.

                                     B-42
<PAGE>

                          CERTIFICATE OF AMENDMENT

                                    of the
                             AMENDED AND RESTATED
                         CERTIFICATE OF INCORPORATION
                                      of
                           NPS Pharmaceuticals, Inc.


     The undersigned, being the President and Secretary of NPS Pharmaceuticals,
Inc. ("NPS" or the "Corporation"), do hereby certify and set forth that the
Certificate of Incorporation was originally filed with the Secretary of State of
Delaware on March 2, 1992, and was amended and restated in its entirety on June
4, 1994 (the "Certificate of Incorporation").

     1.   Paragraph 4.1 of the Certificate of Incorporation which sets forth the
authorized capital stock of the Corporation is amended to read as follows:

          4.1  This Corporation is authorized to issue two classes of stock to
     be designated, respectively, "Common Stock" and "Preferred Stock."  The
     total number of shares which the Corporation is authorized to issue is
     Fifty Million (50,000,000) shares. Forty-five million (45,000,000) shares
     shall be Common Stock, each having a par value of one-tenth of one cent
     ($.001). Five million (5,000,000) shares shall be Preferred Stock, each
     having a par value of one-tenth of one cent ($.001).

     2.   This Certificate of Amendment was authorized by a unanimous resolution
of the Board of Directors followed by the affirmative vote of the holders of a
majority of all shares of capital stock of the Corporation entitled to vote
thereon at a meeting of the stockholders of the Corporation duly called and held
on the ___ day of ___________, 1999, a quorum being present.

     IN WITNESS WHEREOF, the Corporation has caused this Certificate of
Amendment to be executed by its President and attested to by its Secretary this
____ day of ___________, 1999.

ATTEST:                             NPS Pharmaceuticals, Inc.



_____________________________       ________________________________________
James U. Jensen,                    Hunter Jackson, Ph.D.,
Secretary                           President


                                      C-1
<PAGE>

PRIVATE AND CONFIDENTIAL
- ------------------------


                                             September 27, 1999

The Board of Directors
NPS Pharmaceuticals, Inc.
420 Chipeta Way
Salt Lake City, UT 84108

Members of the Board:

          We understand that NPS Pharmaceuticals, Inc., a Delaware corporation
(the "Company" or "NPS"), and Allelix Biopharmaceuticals Inc., a corporation
subsisting pursuant to the laws of Canada ("Allelix"), propose to enter into an
Arrangement Agreement, including the Plan of Arrangement (the "Agreement").
Pursuant to the Agreement, Allelix shall merge (the "Merger") with and into NPS-
Allelix, Inc., a corporation incorporated under the Business Corporations Act
(Ontario) and an indirect, wholly-owned subsidiary of NPS (the "Merger Sub").
In the Merger, each outstanding common share of Allelix (the "Allelix Common
Shares") will be converted into the right to receive (a) 0.3238 shares (the
"Exchange Ratio") of common stock, par value $.001 per share, of the Company
(the "NPS Common Stock") or (b) at the election of certain holders of Allelix
Common Shares, 0.3238 exchangeable shares of Merger Sub (the "Exchangeable
Shares").  To the extent provided in the Agreement, each of the Exchangeable
Shares is exchangeable for one share of NPS Common Stock.

          You have requested our opinion as to the fairness to the Company from
a financial point of view as of the date hereof of the Exchange Ratio to the
Company.  In conducting our analysis and arriving at the opinion expressed
herein, we have reviewed such materials and considered such financial and other
factors as we deemed relevant under the circumstances, including:

     (i)      a draft dated September 25, 1999 of the Agreement;

     (ii)     certain other publicly-available historical financial and
              operating data for NPS including, but not limited to, (a) the
              Annual Report on Form 10-K for the fiscal year ended December 31,
              1998, (b) the Quarterly Report on Form 10-Q for the quarter ended
              June 30, 1999, and (c) the Proxy Statement for the Meeting of
              Stockholders held on May 26, 1999.

     (iii)    certain information relating to NPS, including financial forecasts
              for the fiscal years December 31, 1999 through December 31, 2004,
              prepared by the management of the Company;

     (iv)     certain publicly-available historical financial and operating data
              for Allelix including, but not limited to, the Annual Report for
              the fiscal years ended August 31, 1998, and unaudited financial
              statements for Allelix for the fiscal year ended August 31, 1999;

     (v)      certain information relating to Allelix, including the financial
              forecasts for the four months ended December 31, 1999 and the
              fiscal years ending December 31, 2000 through December 31, 2004
              prepared by the management of Allelix;


                                      D-1
<PAGE>

Board of Directors
NPS Pharmaceuticals, Inc.
September 27, 1999
Page 2



  (vi)    publicly-available financial, operating and stock market data
          concerning certain companies engaged in businesses we deemed
          comparable to Allelix or otherwise relevant to our inquiry;

  (vii)   the financial terms of certain recent transactions we deemed relevant
          to our inquiry;

  (viii)  the historical stock prices and trading volumes of NPS Common Stock
          and Allelix Common Shares;

  (ix)    the Stock Purchase Agreement dated October 30, 1998 between Allelix
          and Johnson & Johnson Development Corporation; and

  (x)     such other financial studies, analyses and investigations that we
          deemed appropriate.

     We have assumed, with your consent that, (a) each holder of Allelix Common
Shares will receive 0.3238 shares of NPS Common Stock and (b) the draft of the
Agreement which we reviewed (as referred to above) will conform in all material
respects to that document when in final form and that the Merger will be
consummated on the terms described in the Agreement without any waiver of any
material terms or conditions.

     We have met with the senior management of the Company and Allelix to
discuss (i) the prospects for their respective businesses, (ii) their estimates
of such businesses' future financial performance, (iii) the financial impact of
the Merger on the respective companies and (iv) such other matters that we
deemed relevant.

     In connection with our review and analysis and in arriving at our opinion,
we have relied upon the accuracy and completeness of the financial and other
information publicly available or otherwise made available or provided to us
concerning the Company and Allelix, and have not undertaken any independent
verification of such information or any independent valuation or appraisal of
any of the assets or liabilities of the Company or Allelix and we have not been
provided with any such independent valuation or appraisal.  With respect to the
financial forecasts provided to us by the Company for the Company, and by
Allelix for Allelix, we have assumed that such information (including the
assumptions and bases therefor) represents each respective management's best
currently available estimate as to the future financial performance of the
Company and Allelix and that the Company and Allelix will perform in accordance
with such projections.  We assume no responsibility for and express no view as
to such forecasts or the assumptions under which they were prepared.  Further,
our opinion is necessarily based on economic, financial and market conditions as
they exist and can only be evaluated as of the date hereof.

     Our opinion does not address nor should it be construed to address the
relative merits of the Merger or alternative business strategies that may be
available to the Company.  In addition, this opinion does not in any manner
address the prices at which NPS Common Stock or the Exchangeable Shares will
trade following consummation of the Merger.

                                      D-2
<PAGE>

Board of Directors
NPS Pharmaceuticals, Inc.
September 27, 1999
Page 3



     As you know, we have been retained by the Company to render this opinion
and provide other financial advisory services in connection with the Merger and
will receive a fee for such services, substantially all of which is contingent
upon the consummation of the Merger.  In the ordinary course of business we may
actively trade the shares of NPS Common Stock and Allelix Common Shares for our
own account and for the accounts of customers and, accordingly, may at any time
hold a long or short position in such securities.  As you are aware, Prudential
Securities Incorporated provides equity research coverage on NPS.

     This letter and the opinion expressed herein are for the use of the Board
of Directors of the Company.  This opinion does not constitute a recommendation
to the stockholders of the Company as to how such stockholders should vote in
connection with the issuance of shares of NPS Common Stock pursuant to the
Merger or as to any other action such stockholders should take regarding the
Merger.  This opinion may not be reproduced, summarized, excerpted from or
otherwise publicly referred to or disclosed in any manner, without our prior
written consent; except that the Company may include this opinion in its
entirety in any proxy statement or information statement relating to the Merger
sent to the Company's stockholders.

     Based upon and subject to the foregoing, we are of the opinion that, as of
the date hereof, the Exchange Ratio is fair to the Company from a financial
point of view.


                                   Very truly yours,


                                   PRUDENTIAL SECURITIES INCORPORATED

                                   /s/ Barry M. Deutsch
                                   Barry M. Deutsch
                                   Director


                                      D-3
<PAGE>

                                     LOGO

November 15, 1999

Dear Shareholder:

  The Board of Directors cordially invites you to attend a meeting of
shareholders of Allelix Biopharmaceuticals Inc. to be held at TSE Place, The
Exchange Tower, 2 First Canadian Place, 130 King Street West, Toronto, Ontario
on Wednesday, December 15, 1999 at 2:00 p.m. (Toronto time).

  At the meeting, you will be asked to approve a proposed plan of arrangement
involving Allelix, Allelix's wholly-owned subsidiary, 1380390 Ontario Inc., and
NPS Pharmaceuticals, Inc. pursuant to an Arrangement Agreement between Allelix
and NPS. The Arrangement will result in Allelix becoming a subsidiary of NPS. In
order to facilitate the Arrangement, you will also be asked to approve a
continuance of Allelix from the Canada Business Corporations Act to the Business
Corporations Act (Ontario).

  The Board of Directors has determined unanimously that the Arrangement is fair
to the Allelix shareholders and is in the best interests of Allelix.
Accordingly, the Board of Directors unanimously recommends that you vote to
approve both the continuance and the Arrangement.

  Under the Arrangement, each Allelix common share will be exchanged for 0.3238
NPS common shares or 0.3238 exchangeable shares.

  The exchangeable shares will be issued by NPS Allelix Inc., an indirect,
wholly-owned subsidiary of NPS, and, as nearly as practicable, will be the
functional and economic equivalent of shares of NPS common shares. The
exchangeable shares will be exchangeable at any time at the option of the
holder, on a one-for-one basis, for NPS common shares. The exchangeable shares
provide an opportunity for certain shareholders of Allelix to achieve a Canadian
tax deferral in certain circumstances, as described in the attached management
proxy circular and permit shareholders to hold these shares as Canadian property
in tax registered plans.

  A Letter of Transmittal and Election Form for use by registered holders of
Allelix common shares is enclosed with the management proxy circular. A separate
Letter of Transmittal and Election Form is available, upon request. Holders of
Allelix common shares will not receive certificates for the exchangeable shares
or NPS common shares to which they are entitled under the Arrangement until they
return a properly completed Letter of Transmittal and Election Form, together
with the certificates for their shares and any other required documentation to
CIBC Mellon Trust Company at one of the addresses specified on the last page of
the Letter of Transmittal and Election Form.

  The Arrangement is conditional upon, among other things, approval of 66 2/3
percent of the votes cast by Allelix shareholders who attend the meeting, in
person or by proxy. Likewise, the continuance, which is a necessary step in
proceeding with the Arrangement, is conditional upon, among other things,
approval of 66 2/3 percent of the votes cast by Allelix shareholders who attend
the meeting, in person or by proxy. The attached management proxy circular
contains a detailed description of the Arrangement, the Arrangement Agreement
and the continuance and other information that may help you make an informed
decision.

  We hope you will be able to attend the meeting. Whether or not you are able to
attend, it is still important that you be represented at the meeting. We
encourage you to complete the enclosed form of proxy and return it to Allelix or
CIBC Mellon Trust Company so that it arrives not later than 5:00 p.m. (Toronto
time) on Monday, December 13, 1999. Voting by proxy will not prevent you from
voting in person if you attend the meeting, but will ensure that your vote will
be counted if you are unable to attend.

  If you are not a registered holder of Allelix common shares and have received
this letter and the management proxy circular from your broker or another
intermediary, please complete and return the proxy or other authorization form
provided to you by your broker or other intermediary in accordance with the
instructions provided with it. Failure to do so may result in your Allelix
common shares not being eligible to be voted at the meeting.

Sincerely,

SIGNATURE

Dr. John R. Evans
Chairman
Allelix Biopharmaceuticals Inc.
<PAGE>

________________________________________________________________________________

                             ARRANGEMENT INVOLVING
                       ALLELIX BIOPHARMACEUTICALS INC.,
                           1380390 ONTARIO INC. and
                           NPS PHARMACEUTICALS, INC.

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                                      and
                           MANAGEMENT PROXY CIRCULAR
                      OF ALLELIX BIOPHARMACEUTICALS INC.

                               November 15, 1999

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT ALL SHAREHOLDERS VOTE FOR THE
             CONTINUANCE RESOLUTION AND THE ARRANGEMENT RESOLUTION

________________________________________________________________________________
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                            Page
                                                                                                                            ----
<S>                                                                                                                         <C>
TABLE OF CONTENTS.........................................................................................................     i
NOTICE OF SPECIAL MEETING OF ALLELIX SHAREHOLDERS.........................................................................     1
GLOSSARY OF TERMS.........................................................................................................     3
REPORTING CURRENCIES AND ACCOUNTING PRINCIPLES............................................................................    11
CANADIAN/U.S. EXCHANGE RATES..............................................................................................    11
INFORMATION CONCERNING NPS AND ITS AFFILIATES.............................................................................    11
SUMMARY...................................................................................................................    12
Business of NPS...........................................................................................................    12
Business of Allelix.......................................................................................................    12
Date, Place and Purpose of the Allelix Meeting............................................................................    12
Allelix Shareholders Entitled to Vote.....................................................................................    12
Vote Required.............................................................................................................    13
The Continuance of Allelix................................................................................................    13
The Arrangement...........................................................................................................    13
Effective Time............................................................................................................    14
The Exchangeable Shares...................................................................................................    15
Treatment of Options and Warrants.........................................................................................    15
Recommendation of the Board of Directors of Allelix.......................................................................    16
Opinion of Allelix's Financial Adviser, BancBoston Robertson
  Stephens................................................................................................................    16
Conditions to Closing.....................................................................................................    16
Termination and Termination Fees and Expenses.............................................................................    17
Accounting Treatment......................................................................................................    17
Stock Exchange Listings...................................................................................................    17
Certain Tax Considerations................................................................................................    18
Dissent Rights............................................................................................................    18
Investment Considerations.................................................................................................    18
GENERAL PROXY INFORMATION.................................................................................................    19
General...................................................................................................................    19
Solicitation of Proxies...................................................................................................    19
Record Date and Entitlement to Vote.......................................................................................    19
Signing and Deposit of Proxies............................................................................................    19
Revocation of Proxies.....................................................................................................    19
Voting of Proxies.........................................................................................................    20
Voting Shares.............................................................................................................    20
Business of the Allelix Meeting...........................................................................................    20
Required Votes to Approve the Continuance Resolution, the
  Arrangement Resolution and the Option Resolution........................................................................    20
Interest of Management....................................................................................................    21
THE CONTINUANCE OF ALLELIX................................................................................................    21
THE ARRANGEMENT...........................................................................................................    21
Background of the Arrangement.............................................................................................    21
Allelix's Reasons for the Arrangement and Recommendation of
  the Board of Directors of Allelix.......................................................................................    22
Opinion of Allelix's Financial Adviser, BancBoston Robertson
  Stephens................................................................................................................    24
Procedures for Election and Exchange of Share
  Certificates............................................................................................................    24
Transaction Mechanics and Description of Exchangeable
  Shares..................................................................................................................    25
Allelix Preferred Shares..................................................................................................    32
Options...................................................................................................................    32
Warrants..................................................................................................................    33
Court Approval and Completion of the Arrangement..........................................................................    33
Accounting Treatment......................................................................................................    33
Stock Exchange Listing....................................................................................................    34
Resale of Exchangeable Shares and NPS Common Shares Received
  in the Arrangement......................................................................................................    34
Ongoing Canadian Reporting Obligations....................................................................................    35
Future Issuances of Shares................................................................................................    35
Expenses..................................................................................................................    35
OPTION RESOLUTION.........................................................................................................    36
THE ARRANGEMENT AGREEMENT AND RELATED AGREEMENTS..........................................................................    37
Arrangement Agreement Amendments..........................................................................................    37
Effective Date of the Arrangement.........................................................................................    37
Termination...............................................................................................................    37
Termination Fees and Expenses.............................................................................................    37
Conditions to Closing.....................................................................................................    38
General Covenants.........................................................................................................    42
Covenants of Allelix Regarding Non-Solicitation...........................................................................    44
</TABLE>

                                      E-i
<PAGE>

<TABLE>
<S>                                                                                                                          <C>
Covenants of NPS Regarding No Shop........................................................................................    44
Representations and Warranties............................................................................................    45
Confidentiality...........................................................................................................    45
Standstill................................................................................................................    46
Access....................................................................................................................    47
Amendment.................................................................................................................    47
Support Agreement.........................................................................................................    47
INVESTMENT CONSIDERATIONS.................................................................................................    49
U.S. Federal Income Tax Consequences to Allelix Common
  Shareholders............................................................................................................    49
Canadian Federal Income Tax Consequences to Allelix Common
  Shareholders............................................................................................................    49
Market for Exchangeable Shares............................................................................................    50
Risk Related to the Arrangement...........................................................................................    50
Risk Factors Related to the Business of NPS...............................................................................    51
MARKET PRICE..............................................................................................................    52
SELECTED CONSOLIDATED FINANCIAL INFORMATION OF ALLELIX....................................................................    54
SELECTED FINANCIAL INFORMATION OF NPS.....................................................................................    55
ALLELIX'S AND NPS' UNAUDITED PRO FORMA CONDENSED
  CONSOLIDATED FINANCIAL STATEMENTS.......................................................................................    56
INCOME TAX CONSIDERATIONS FOR ALLELIX COMMON SHAREHOLDERS.................................................................    56
Canadian Federal Income Tax Considerations................................................................................    56
Allelix Common Shareholders Resident in Canada............................................................................    57
Allelix Common Shareholders Not Resident in Canada........................................................................    63
United States Federal Income Tax Considerations...........................................................................    64
U.S. Holders..............................................................................................................    64
Non-U.S. Holders..........................................................................................................    66
Backup Withholding and Information Reporting..............................................................................    68
INFORMATION CONCERNING NPS................................................................................................    69
Business of NPS...........................................................................................................    69
Documents Incorporated....................................................................................................    71
Share Capital Matters.....................................................................................................    72
Stock Exchange Listings...................................................................................................    73
Principal Holders of Common Stock.........................................................................................    74
Auditors, Transfer Agent and Registrar....................................................................................    74
INFORMATION CONCERNING NPS ALLELIX........................................................................................    74
NPS Allelix...............................................................................................................    74
Directors and Officers....................................................................................................    74
Share Capital Matters.....................................................................................................    75
Transfer Agent and Registrar..............................................................................................    75
INFORMATION CONCERNING ALLELIX............................................................................................    75
Business of Allelix.......................................................................................................    75
Documents Incorporated by Reference.......................................................................................    77
1999 Financial Results and Management's Discussion and
  Analysis of Financial Condition and Results of
  Operations..............................................................................................................    77
Information Concerning Forward-looking Statements.........................................................................    77
Directors and Officers....................................................................................................    78
Executive Compensation....................................................................................................    80
Termination of Employment, Change of Responsibility and
  Employment Contracts....................................................................................................    81
Long-Term Incentive Plans -- Awards in the Year Ended
  August 31, 1999.........................................................................................................    81
Option Grants During the Year Ended August 31, 1999.......................................................................    81
Stock Performance Graph...................................................................................................    84
Auditors, Transfer Agent and Registrar....................................................................................    85
COMPARISON OF SHAREHOLDERS' RIGHTS........................................................................................    85
Vote Required for Extraordinary Transactions..............................................................................    85
Amendment to Governing Documents..........................................................................................    86
Dissenters' Rights........................................................................................................    86
Oppression Remedy.........................................................................................................    87
Derivative Actions........................................................................................................    87
Shareholder Consent in Lieu of Meeting....................................................................................    88
Director Qualifications...................................................................................................    88
Fiduciary Duties of Directors.............................................................................................    88
Indemnification of Officers and Directors.................................................................................    89
Director Liability........................................................................................................    89
DISSENTING SHAREHOLDER RIGHTS.............................................................................................    90
AVAILABLE INFORMATION.....................................................................................................    92
LEGAL MATTERS.............................................................................................................    93
EXPERTS...................................................................................................................    93
APPROVAL OF PROXY CIRCULAR BY ALLELIX'S BOARD OF
  DIRECTORS...............................................................................................................    93
APPENDICES
A FORM OF CONTINUANCE RESOLUTION..........................................................................................   A-1
</TABLE>

                                     E-ii
<PAGE>

<TABLE>
<S>                                                                                                                        <C>
B FORM OF ARRANGEMENT RESOLUTION.......................................................................................... B-1
C FORM OF OPTION RESOLUTION............................................................................................... C-1
D PLAN OF ARRANGEMENT INCLUDING EXCHANGEABLE SHARE
  PROVISIONS AND ALLELIX PREFERRED SHARE PROVISIONS....................................................................... D-1
E FORM OF SUPPORT AGREEMENT............................................................................................... E-1
F FORM OF VOTING AND EXCHANGE TRUST AGREEMENT............................................................................. F-1
G INTERIM ORDER AND NOTICE OF APPLICATION................................................................................. G-1
H OPINION OF BANCBOSTON ROBERTSON STEPHENS................................................................................ H-1
I SECTION 190 OF THE CBCA................................................................................................. I-1
J NPS' ANNUAL REPORT ON FORM 10-K/A FOR THE FISCAL YEAR
  ENDED DECEMBER 31, 1998................................................................................................. J-1
K NPS' PROXY STATEMENT DATED APRIL 21, 1999 FOR ITS 1999
  ANNUAL MEETING OF STOCKHOLDERS.......................................................................................... K-1
L NPS' QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTERLY
  PERIOD ENDED MARCH 31, 1999............................................................................................. L-1
M NPS' QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTERLY
  PERIOD ENDED JUNE 30, 1999.............................................................................................. M-1
N NPS' QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTERLY
  PERIOD ENDED SEPTEMBER 30, 1999......................................................................................... N-1
O NPS' CURRENT REPORTS ON FORM 8-K DATED OCTOBER 1, 1999 AND
  NOVEMBER 11, 1999....................................................................................................... O-1
P ALLELIX'S CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR
  ENDED AUGUST 31, 1999................................................................................................... P-1
Q ALLELIX'S MANAGEMENT'S DISCUSSION AND ANALYSIS OF
  FINANCIAL CONDITION AND RESULTS OF OPERATIONS FOR THE YEAR
  ENDED AUGUST 31, 1999................................................................................................... Q-1
R ALLELIX'S AND NPS' UNAUDITED PRO FORMA CONDENSED
  CONSOLIDATED FINANCIAL STATEMENTS....................................................................................... R-1
S RISK FACTORS RELATED TO THE BUSINESS OF NPS............................................................................. S-1
</TABLE>

                                     E-iii
<PAGE>

                           NOTICE OF SPECIAL MEETING
                            OF ALLELIX SHAREHOLDERS

NOTICE IS HEREBY GIVEN that a special meeting (the "Meeting") of registered
holders of common shares ("Allelix Common Shares") and preferred shares
("Allelix Preferred Shares") of Allelix Biopharmaceuticals Inc. ("Allelix") will
be held at TSE Place, The Exchange Tower, 2 First Canadian Place, 130 King
Street West, Toronto, Ontario on Wednesday, December 15, 1999 at 2:00 p.m.
(Toronto time):

1. for the registered holders of Allelix Common Shares and the registered holder
   of Allelix Preferred Shares to consider and, if determined advisable, approve
   a special resolution (the "Continuance Resolution") approving the continuance
   of Allelix as an Ontario corporation under the Business Corporations Act
   (Ontario);

2. for the class consisting of the registered holders of Allelix Common Shares
   and the class consisting of the registered holder of Allelix Preferred Shares
   to each, separately, consider and, if determined advisable, approve a special
   resolution (the "Arrangement Resolution") in respect of a plan of arrangement
   (the "Arrangement"), all as more particularly described in the accompanying
   management proxy circular of Allelix (the "Circular");

3. for the registered holders of Allelix Common Shares to consider and, if
   determined advisable, approve a resolution approving the reissuance of
   options to purchase Allelix Common Shares held by certain insiders and the
   variance of the exercise period of options held by certain directors of
   Allelix;

4. for the registered holders of Allelix Common Shares to receive and consider
   the consolidated financial statements of Allelix for the fiscal year ended
   August 31, 1999, together with the auditors' report thereon; and

5. to transact such other business as may properly come before the Meeting or
   any adjournment thereof.

   If you are not able to attend the Meeting, please exercise your right to vote
by signing and returning the enclosed form of proxy to Allelix or CIBC Mellon
Trust Company in the enclosed envelope so as to arrive not later than 5:00 p.m.
(Toronto time) on Monday, December 13, 1999 or, if the Meeting is adjourned or
postponed, 48 hours (excluding Saturdays, Sundays and holidays) before the time
the adjourned Meeting is to be reconvened. Proxies may also be deposited with
the scrutineers of the Meeting, to the attention of the Chairman of the Meeting,
immediately prior to the commencement of the Meeting, or any adjournment or
postponement thereof.

   Pursuant to section 190 of the Canada Business Corporations Act ("CBCA"),
each registered holder of Allelix Common Shares or Allelix Preferred Shares is
entitled to dissent from the Continuance Resolution and to be paid by Allelix,
if the Continuance becomes effective, the fair value of the Allelix Common
Shares or Allelix Preferred Shares held by such holder in respect of which such
holder dissents, determined as of the day before the date on which the
Continuance Resolution is passed, provided that such holder gives written notice
of his, her or its dissent (a "Notice of Dissent") to Allelix by depositing such
Notice of Dissent with Allelix, or mailing it to Allelix by registered mail, at
its principal executive office at 6850 Goreway Drive, Mississauga, Ontario, L4V
1V7, marked to the attention of the Senior Vice President, Chief Financial
Officer and Corporate Secretary of Allelix at or before the Meeting, and
otherwise complies with section 190 of the CBCA as more fully described in the
Circular. Failure to comply strictly with such dissent procedures may result in
the loss or unavailability of any right of dissent.

   Pursuant to the interim order of the Superior Court of Justice (Ontario)
(Commercial List) dated November 2, 1999 and section 190 of the CBCA, each
registered holder of Allelix Common Shares is entitled to dissent from the
Arrangement Resolution and to be paid by Allelix, if the Arrangement becomes
effective, the fair value of the Allelix Common Shares held by such holder in
respect of which such holder dissents, determined as of the day before the date
on which the Arrangement Resolution is passed provided that such holder deposits
a Notice of Dissent with Allelix, or mails it to Allelix by registered mail, at
its principal executive office at 6850 Goreway Drive, Mississauga, Ontario, L4V
1V7, marked to the attention of the Senior Vice President, Chief Financial
Officer and Corporate Secretary of Allelix at or before the Meeting, and
otherwise complies with section 190 of the CBCA as more fully described in the
Circular. Failure to comply strictly with such dissent procedures may result in
the loss or unavailability of any right of dissent.

                                      E-1
<PAGE>

   If holders of more than 10 percent of Allelix Common Shares exercise their
right to dissent from either the Continuance Resolution or the Arrangement
Resolution or both, each of Allelix and NPS have the right to choose not to
effect the Arrangement.

   The Circular provides additional information relating to the matters to be
dealt with at the Meeting and forms part of this Notice.

BY ORDER OF THE BOARD OF DIRECTORS

SIGNATURE

Paul J. Van Damme
Senior Vice President,
Chief Financial Officer and
Corporate Secretary

November 15, 1999
Toronto, Ontario

                                      E-2
<PAGE>

                               GLOSSARY OF TERMS

  Unless the context otherwise requires, the following terms shall have the
meanings set forth below when used in this Circular, words importing the
singular number shall include the plural and vice versa and words importing any
gender shall include all genders. These defined terms are not always used in the
financial statements and other financial information included herein.

"Acquisition Proposal" means a written proposal or offer by any Person to
acquire beneficial ownership of all or a material portion of the assets of
Allelix (including shares of its Subsidiaries) or one or more of its
Subsidiaries or not less than 10 percent of the Allelix Common Shares or of one
or more of its Subsidiaries pursuant to an amalgamation, plan of arrangement,
consolidation or other business combination, sale of shares or other securities,
sale of assets, take-over bid or tender offer or exchange offer or similar
transaction involving Allelix or one or more of its Subsidiaries including,
without limitation, any single or multi-step transaction or series of related
transactions which is structured to permit such third party to acquire
beneficial ownership or any material portion of the assets of, or such
percentage of the Allelix Common Shares or one or more of its Subsidiaries
(other than transactions contemplated by the Arrangement Agreement);

"1380390" means 1380390 Ontario Inc., a direct, wholly-owned subsidiary of
Allelix;

"Affiliate" has the meaning ascribed thereto in the Securities Act;

"Allelix" means Allelix Biopharmaceuticals Inc.;

"Allelix Common Shareholders" means the registered holders of Allelix Common
Shares;

"Allelix Common Shares" means the common shares in the capital of Allelix;

"Allelix Counsel" means Stikeman, Elliott or such other counsel as may be
appointed by Allelix;

"Allelix Meeting" means the special meeting of Allelix Shareholders, as ordered
pursuant to the Interim Order, and all adjournments and postponements thereof,
to, among other things, consider and, if determined advisable, approve the
Continuance Resolution; to consider and, if determined advisable, approve the
Arrangement Resolution; and to consider and, if deemed advisable, approve the
Option Resolution;

"Allelix Options" means the options to purchase Allelix Common Shares issued
from time to time prior to the date of the Arrangement Agreement pursuant to the
Allelix Stock Option Plan;

"Allelix Preferred Shareholder" means the registered holder of Allelix Preferred
Shares;

"Allelix Preferred Shares" means the preferred share, Series 1 shares in the
capital of Allelix;

"Allelix Shareholders" means collectively the Allelix Common Shareholders and
the Allelix Preferred Shareholder;

"Allelix Stock Option Plan" means the employee stock option plan dated December
19, 1991 of Allelix;

"Allelix Warrants" means the warrants to purchase Allelix Common Shares;

"Ancillary Rights" means the Voting Rights, the Automatic Exchange Rights and
the Exchange Right;

"Applicable Law" means, in relation to any Person, transaction or event, all
applicable provisions (or mandatory applicable provisions, if so specified) of
laws, statutes, regulations, rules, official directives and orders of all stock
exchanges and governmental bodies (whether administrative, legislative,
executive or otherwise) and judgments, orders, rulings and decrees of all
courts, arbitrators, commissions or bodies exercising similar functions in
actions or proceedings in which the Person in question is a party or by which it
is bound or having application to the transaction or event;

"Arrangement" means an arrangement under section 182 of the OBCA on the terms
and subject to the conditions set out in the Plan of Arrangement, subject to any
amendments or variations thereto made in accordance with Article 6 of the Plan
of Arrangement or made at the direction of the Court in the Final Order;

"Arrangement Agreement" means the agreement made as of September 27, 1999
between NPS and Allelix, as amended by amendment no. 1 thereto dated as of
October 28, 1999 between NPS and Allelix and as further amended by amendment no.
2 thereto dated as of November 15, 1999 between NPS and Allelix, providing for,
among other things, the Arrangement;

                                      E-3
<PAGE>

"Arrangement Resolution" means the special resolution in respect of the
Arrangement to be considered by Allelix Shareholders at the Allelix Meeting, the
form of which is attached to this Circular as Appendix B;

"Articles of Arrangement" means the articles of arrangement in respect of the
Arrangement required by the OBCA to be filed with the OBCA Director after the
Final Order is made;

"Automatic Exchange Rights" means the benefit of the obligation of NPS to effect
the automatic exchange of Exchangeable Shares for NPS Common Shares pursuant to
section 5.12 of the Voting and Exchange Trust Agreement;

"Beneficiaries" means the registered holders from time to time of Exchangeable
Shares, other than NPS and its Affiliates;

"business day" means any day, other than Saturday, Sunday and a statutory
holiday in Toronto, Ontario or Salt Lake City, Utah;

"Call Rights" means the Liquidation Call Right, the Redemption Call Right and
the Retraction Call Right, collectively;

"Canadian Dollar Equivalent" means, in respect of an amount expressed in a
currency other than Canadian dollars (the "Foreign Currency Amount") at any
date, the product obtained by multiplying (a) the Foreign Currency Amount by (b)
the Noon Spot Rate on such date for such foreign currency expressed in Canadian
dollars as reported by the Bank of Canada or, in the event such Noon Spot Rate
is not available, such exchange rate on such date for such foreign currency
expressed in Canadian dollars as may be deemed by the Allelix board of directors
to be appropriate for such purpose;

"Canadian GAAP" means Canadian generally accepted accounting principles;

"Canadian Resident" means a resident of Canada for purposes of the ITA;

"CBCA" means the Canada Business Corporations Act, as now in effect and as it
may be amended from time to time prior to the Effective Date, including the
regulations made thereunder;

"$" means Canadian dollars;

"CDS" means The Canadian Depository for Securities Limited;

"Certificate" means the certificate of arrangement giving effect to the
Arrangement, issued pursuant to subsection 183(2) of the OBCA after the Articles
of Arrangement have been filed;

"Circular" means the Notice of Special Meeting and accompanying management proxy
circular of Allelix, including all appendices thereto;

"Code" means the United States Internal Revenue Code of 1986, as amended;

"Confidential Information" means all interpretations, technical data, reports,
notes, know how, computer printouts, information and documents (in each case
whether in written or electronic form) pertaining in any way whatsoever to the
business, operations or capital of a party to the Arrangement Agreement or its
Affiliates, disclosed or to be disclosed pursuant to the terms and conditions of
the Arrangement Agreement, and includes but is not limited to information
relating to engineering, research and development, corporate operations,
business opportunities, products, formulas, services, designs, drawings,
marketing and financial and taxation matters;

"Continuance" means the continuance of Allelix under the OBCA, pursuant to
section 188 of the CBCA and section 180 of the OBCA;

"Continuance Resolution" means the special resolution in respect of the
Continuance to be considered by the Allelix Shareholders at the Allelix Meeting,
the form of which is attached to this Circular as Appendix A;

"Court" means the Superior Court of Justice (Ontario) (Commercial List);

"Current Market Price" means, in respect of a NPS Common Share on any date, the
average of the closing bid and ask prices of NPS Common Shares during a period
of 20 consecutive trading days ending not more than three trading days before
such date on the NASDAQ Stock Market, or, if the NPS Common Shares are not then
quoted on the NASDAQ Stock Market, on such other stock exchange or automated
quotation system on which the NPS Common Shares are listed or quoted, as the
case may be, as may be selected by the board of directors of NPS for such
purpose; provided however, that if in the opinion of the board of directors of
NPS the public distribution or trading activity of NPS Common Shares during such
period does not create a market which reflects the fair

                                      E-4
<PAGE>

market value of a NPS Common Share, then the Current Market Price of a NPS
Common Share shall be determined by the board of directors of NPS, in good faith
and in its sole discretion, and provided further that any such selection,
opinion or determination by the board of directors of NPS shall be conclusive
and binding;

"Depositary" means the depositary selected by NPS and Allelix, acting
reasonably;

"Dissent Procedures" means the dissent procedures under section 190 of the CBCA
and the Interim Order, as more fully described under the heading "Dissenting
Shareholder Rights" and set out in Appendix I to this Circular;

"Dissent Rights" means the right of a holder of Allelix Common Shares or Allelix
Preferred Shares to dissent from the Continuance Resolution and the right of a
holder of Allelix Common Shares to dissent from the Arrangement Resolution in
accordance with the Dissent Procedures;

"Dissenting Shareholder" means a holder of Allelix Common Shares or Allelix
Preferred Shares who dissents in respect of the Continuance Resolution or a
holder of Allelix Common Shares who dissents in respect of the Arrangement
Resolution in accordance with the Dissent Rights;

"Dividend Amount" means the amount of all declared and unpaid dividends on an
Exchangeable Share held by a holder on any dividend record date which occurred
prior to the date of purchase or redemption of such share by NPS Allelix or NPS
Holdings from such holder;

"Effective Date" means the date shown on the Certificate;

"Effective Time" means 12:01 a.m. (Toronto time) on the Effective Date;

"Elected Amount" means the amount selected by an Eligible Holder to be the
proceeds of disposition of the Allelix Common Shares in the election made
pursuant to section 85 of the ITA;

"Election Deadline" means 5:00 p.m. (local time) at the place of deposit on the
date which is two business days prior to the date of the Allelix Meeting;

"Eligible Holder" means a holder of Allelix Common Shares (i) who is a Canadian
Resident, other than any such holder who is exempt from tax under the ITA, or
(ii) which is a partnership that owns Allelix Common Shares if one or more of
its partners would be an Eligible Holder if such partner held directly such
shares;

"Exchange Act" means the United States Securities Exchange Act of 1934, as
amended;

"Exchange Ratio" means 0.3238, subject to adjustment, if any, as provided in
section 2.4 of the Plan of Arrangement;

"Exchange Right" has the meaning ascribed thereto in section 5.1 of the Voting
and Exchange Trust Agreement;

"Exchangeable Elected Share" means any Allelix Common Share (other than an
Allelix Common Share held by NPS or an Affiliate of NPS) held by a Canadian
Resident that the holder thereof shall have elected, in a duly completed Letter
of Transmittal and Election Form deposited with the Depositary no later than the
Election Deadline, to transfer to NPS Allelix under the Arrangement for a
fraction of an Exchangeable Share equal to the Exchange Ratio or that is deemed
to be an Exchangeable Elected Share pursuant to section 2.2(c) of the Plan of
Arrangement;

"Exchangeable Shares" means the non-voting exchangeable shares in the capital of
NPS Allelix, having substantially the rights, privileges, restrictions and
conditions set out in the Exchangeable Share Provisions;

"Exchangeable Share Provisions" means the rights, privileges, restrictions and
conditions attaching to the Exchangeable Shares, which rights, privileges,
restrictions and conditions shall be substantially as set out in Appendix 1 to
the Plan of Arrangement;

"Final Order" means the order of the Court approving the Arrangement, as such
order may be amended or modified by the highest court to which an appeal may be
applied for at any time prior to the Effective Date or, if appealed, then,
unless such appeal is withdrawn or denied, as granted or affirmed;

"Governmental Entity" means any (a) multinational, federal, provincial, state,
regional, municipal, local or other government, governmental or public
department, central bank, court, tribunal, arbitral body, commission, board,
bureau or agency, domestic or foreign, (b) any subdivision, agent, commission,
board, or authority of any of the foregoing, or (c) any quasi-governmental or
private body exercising any regulatory, expropriation or taxing authority under
or for the account of any of the foregoing;

                                      E-5
<PAGE>

"Indemnified Parties" has the meaning ascribed thereto in section 9.1 of the
Voting and Exchange Trust Agreement;

"Insolvency Event" means the institution by NPS Allelix of any proceeding to be
adjudicated a bankrupt or insolvent or to be wound up, or the consent of NPS
Allelix to the institution of bankruptcy, insolvency or winding-up proceedings
against it, or the filing of a petition, answer or consent seeking dissolution
or winding-up under any bankruptcy, insolvency or analogous laws, including
without limitation the Companies Creditors' Arrangement Act (Canada) and the
Bankruptcy and Insolvency Act (Canada), and the failure by NPS Allelix to
contest in good faith any such proceedings commenced in respect of NPS Allelix
within 30 days of becoming aware thereof, or the consent by NPS Allelix to the
filing of any such petition or to the appointment of a receiver, or the making
by NPS Allelix of a general assignment for the benefit of creditors, or the
admission in writing by NPS Allelix of its inability to pay its debts generally
as they become due, or NPS Allelix not being permitted, pursuant to solvency
requirements of Applicable Law, to redeem any Retracted Shares pursuant to
section 6.6 of the Exchangeable Share Provisions;

"Interim Order" means an order of the Court dated November 2, 1999 providing
for, among other things, the calling and holding of the Allelix Meeting and
certain other procedural matters, as well as for the issuance of the notice of
application for the Final Order, as the same may be amended or supplemented from
time to time;

"IRS" means the United States Internal Revenue Service;

"ITA" means the Income Tax Act (Canada), as amended;

"J&J" means Johnson & Johnson Development Corporation, a New Jersey corporation;

"Letter of Transmittal and Election Form" means the letter of transmittal and
election form for use by Allelix Common Shareholders in the form accompanying
this Circular;

"Liquidation Amount" has the meaning ascribed thereto in section 5.1 of the
Exchangeable Share Provisions;

"Liquidation Call Purchase Price" has the meaning ascribed thereto in section
5.1(a) of the Plan of Arrangement;

"Liquidation Call Right" has the meaning ascribed thereto in section 5.1(a) of
the Plan of Arrangement;

"Liquidation Date" has the meaning ascribed thereto in section 5.1 of the
Exchangeable Share Provisions;

"Liquidation Event" has the meaning ascribed thereto in section 5.12(b) of the
Voting and Exchange Trust Agreement;

"Liquidation Event Effective Date" has the meaning ascribed thereto in section
5.12(c) of the Voting and Exchange Trust Agreement;

"Material Adverse Effect" and "Material Adverse Change" means, in relation to a
party, a condition affecting or a change in business, assets, properties,
condition (financial or otherwise), results of operations or prospects of such
party (and its Subsidiaries on a consolidated basis) which when taken as a whole
have or represent or could reasonably be expected to have a material adverse
effect on the party or on the market price or value of its securities, other
than any matter or action relating to (i) the Canadian economy or securities
markets in general or (ii) relating to the Canadian or U.S. biotechnology
industry in general, but not specifically relating to the party;

"ME" means The Montreal Exchange;

"Meeting Date" means the date of the Allelix Meeting;

"1933 Act" means the United States Securities Act of 1933, as amended;

"NASDAQ Stock Market" means the National Association of Securities Dealers
Automated Quotation System;

"Noon Spot Rate" means, on any day, the noon spot exchange rate on such day of
the Bank of Canada for one U.S. dollar expressed in Canadian dollars.

"Notice of Special Meeting" means the notice of special meeting of Allelix
Shareholders accompanying this Circular;

"NPS" means NPS Pharmaceuticals, Inc., a Delaware corporation;

                                      E-6
<PAGE>

"NPS Allelix" means 3035387 Nova Scotia Limited, a company limited by shares
formed under the Companies Act (Nova Scotia) as a wholly-owned subsidiary of NPS
Holdings;

"NPS Common Shares" means the shares of common stock in the capital of NPS;

"NPS Control Transaction" means any merger, amalgamation, tender offer, material
sale of shares or rights or interests therein or thereto or similar transactions
involving NPS, or any proposal relating thereto;

"NPS Counsel" means Blake, Cassels & Graydon, James U. Jensen, Esq. and/or such
other counsel as may be appointed by NPS;

"NPS Dividend Declaration Date" means the date on which the board of directors
of NPS declares any dividend on the NPS Common Shares;

"NPS Elected Share" means any Allelix Common Share (other than an Allelix Common
Share held by NPS or an Affiliate of NPS) held by a Canadian Resident that the
holder thereof shall have elected, in a duly completed Letter of Transmittal and
Election Form deposited with the Depositary no later than the Election Deadline,
to transfer to NPS Allelix under the Arrangement for a fraction of a NPS Common
Share equal to the Exchange Ratio, or that is deemed to be a NPS Elected Share
pursuant to Sections 2.2(c) or 2.3(a) of the Plan of Arrangement;

"NPS Holdings" means NPS Holdings Company, an unlimited liability company formed
under the Companies Act (Nova Scotia) as a wholly-owned subsidiary of NPS;

"NPS Information Circular" means the notice of meeting and management
information circular of NPS prepared in connection with the NPS Meeting provided
by NPS to registered holders of NPS Common Shares;

"NPS Meeting" means the special meeting of the registered holders of NPS Common
Shares and all adjournments and postponements thereof to consider and, if
determined advisable, approve, among other things, (i) an amendment of NPS'
articles of incorporation to increase the number of NPS Common Shares authorized
for issuance thereunder; and (ii) the issuance of up to 7,567,202 NPS Common
Shares as contemplated by the Arrangement;

"NPS Shareholder Rights Plan" means the shareholder rights plan adopted by the
board of directors of NPS in December 1996;

"NPS Special Voting Share" means the one share of special voting preferred stock
of NPS issued in its own series which entitles the holder of record of such
share to a number of votes at meetings of registered holders of NPS Common
Shares equal to the number of Exchangeable Shares outstanding from time to time
(other than Exchangeable Shares held by NPS and Affiliates of NPS), which share
is to be issued to, deposited with, and voted by, the Trustee as described in
the Voting and Exchange Trust Agreement;

"OBCA" means the Business Corporations Act (Ontario), as now in effect and as it
may be amended from time to time prior to the Effective Date, including the
regulations made thereunder;

"OBCA Director" means the Director appointed under section 278 of the OBCA;

"Option Resolution" means the resolution to be considered by the Allelix Common
Shareholders at the Allelix Meeting in respect of the reissuance of Allelix
Options held by certain insiders of Allelix and the variance of the exercise
period of options held by certain directors of Allelix, the form of which is
attached to this Circular as Appendix C;

"OSC" means the Ontario Securities Commission;

"Person" includes any individual, firm, partnership, joint venture, venture
capital fund, limited liability company, unlimited liability company,
association, trust, trustee, executor, administrator, legal personal
representative, estate, group, body corporate, corporation, unincorporated
association or organization, Governmental Entity, syndicate or other entity,
whether or not having legal status;

"Plan of Arrangement" means the plan of arrangement which is annexed as Schedule
A to the Arrangement Agreement and any amendment or variation thereto made in
accordance with section 9.1 of the Arrangement Agreement, a copy of which is
attached to this Circular as Appendix D;

"Proposed Amendments" means the proposals to amend the ITA and the regulations
thereunder publicly announced by or on behalf of the Minister of Finance
(Canada) prior to the date hereof;

"Public Documents" means all documents filed, in the case of Allelix, by Allelix
with the applicable securities regulatory authorities in all provinces in Canada
in which Allelix is a reporting issuer, and in the case of NPS, by NPS with the
SEC and the NASDAQ

                                      E-7
<PAGE>

Stock Market, during the three years preceding the date of the Arrangement
Agreement, and includes all documents so filed to and including the Effective
Date by a Person with respect to its business and affairs;

"Record Date" means November 10, 1999;

"Redemption Call Purchase Price" has the meaning ascribed thereto in section
5.2(a) of the Plan of Arrangement;

"Redemption Call Right" has the meaning ascribed thereto in section 5.2(a) of
the Plan of Arrangement;

"Redemption Date" has the meaning ascribed thereto in the Exchangeable Share
Provisions;

"Redemption Price" has the meaning ascribed thereto in section 7.1 of the
Exchangeable Share Provisions;

"Registered holders" means, when used with reference to the Allelix Common
Shares, the holders of Allelix Common Shares shown from time to time in the
register maintained by or on behalf of Allelix in respect of the Allelix Common
Shares and, when used with reference to the Exchangeable Shares, means the
holders of Exchangeable Shares shown from time to time in the register
maintained by or on behalf of NPS Allelix in respect of the Exchangeable Shares;

"Representatives" means officers, directors, employees, financial advisors,
representatives and agents;

"Retracted Shares" has the meaning ascribed thereto in section 6.1(a) of the
Exchangeable Share Provisions;

"Retraction Call Right" has the meaning ascribed thereto in section 6.1(c) of
the Exchangeable Share Provisions;

"Retraction Date" has the meaning ascribed thereto in section 6.1(b) of the
Exchangeable Share Provisions;

"Retraction Price" has the meaning ascribed thereto in section 6.1 of the
Exchangeable Share Provisions;

"Retraction Request" has the meaning ascribed thereto in section 6.1 of the
Exchangeable Share Provisions;

"SEC" means the United States Securities and Exchange Commission;

"Securities Act" means the Securities Act (Ontario) and the rules, regulations
and policies made thereunder, as now in effect and as they may be amended from
time to time prior to the Effective Date;

"Stock Purchase Agreement" means the stock purchase agreement made as of October
30, 1998 by and between Allelix and J&J;

"Subsidiary" means, with respect to (i) a specified body corporate, any body
corporate of which more than 50 percent of the outstanding shares ordinarily
entitled to elect a majority of the board of directors thereof (whether or not
shares of any other class or classes shall or might be entitled to vote upon the
happening of any event or contingency) are at the time owned directly or
indirectly by such specified body corporate and shall include any body corporate
in like relation to a subsidiary, and (ii) any Person other than a corporation
in which the first-mentioned Person or one or more of its subsidiaries directly
or indirectly, has at least a majority ownership and power to direct the
policies, management and affairs thereof;

"Superior Proposal" means an Acquisition Proposal made by a third party that is
financially superior to the Transaction which, in any event, shall mean that
such proposal shall offer a value per Allelix Common Share greater than the per
share value attributable thereto under the Transaction where such third party
has demonstrated that the funds or other consideration necessary for the
Acquisition Proposal are reasonably likely to be available (as determined in
good faith, in each case by the board of directors of Allelix after receiving
the advice of its financial advisors to this effect in writing or recorded in
the minutes);

"Support Agreement" means the agreement made among NPS, NPS Holdings and NPS
Allelix in connection with the Plan of Arrangement and attached to the
Arrangement Agreement as Schedule B, a copy of which is attached to this
Circular as Appendix E;

"Tax" and "Taxes" means, with respect to any entity, all income taxes (including
any tax on or based upon net income, gross income, income as specially defined,
earnings, profits or selected items of income, earnings or profits) and all
capital taxes, paid-up capital taxes, gross receipts taxes, environmental taxes,
sales taxes, use taxes, ad valorem taxes, value added taxes, transfer taxes,
franchise taxes, licence taxes, withholding taxes, payroll taxes, employment
taxes, Canada or Quebec Pension Plan premiums, excise, severance, social
security premiums, workers' compensation premiums, unemployment insurance or
compensation premiums, stamp taxes, occupation taxes, premium taxes, property
taxes, windfall profits taxes, alternative or add-on minimum taxes, goods and
services tax, customs duties or other taxes, fees, imports, assessments or
charges of any kind whatsoever and any instalments in respect thereof, together
with any interest and any penalties or additional amounts imposed by any taxing
authority (domestic or

                                      E-8
<PAGE>

foreign) on such entity and any interest, penalties, additional taxes and
additions to tax imposed with respect to the foregoing;

"Tax Return" and "Tax Returns" means all returns, declarations, reports,
information returns and statements required to be filed with any taxing
authority relating to Taxes;

"Transaction" means the transactions contemplated by the Arrangement Agreement;

"Transfer Agent" means the transfer agent to be chosen by NPS and Allelix to act
as transfer agent of the Exchangeable Shares;

"Trust" means the trust created by the Voting and Exchange Trust Agreement;

"Trustee" means the trustee to be chosen by NPS and Allelix to act as trustee
under the Voting and Exchange Trust Agreement, being a corporation organized and
existing under the laws of Canada and authorized to carry on the business of a
trust company in all the provinces of Canada, and any successor trustee
appointed under the Voting and Exchange Trust Agreement;

"TSE" means The Toronto Stock Exchange;

"U.S. dollars" or "U.S.$" means United States dollars;

"U.S. GAAP" means United States generally accepted accounting principles;

"U.S. Holder" has the meaning ascribed to such term under the heading "Income
Tax Considerations for Allelix Common Shareholders -- United States Federal
Income Tax Considerations";

"U.S. Securities Exchange Act" means the United States Securities Exchange Act
of 1934, as amended;

"Voting and Exchange Trust Agreement" means an agreement to be made among NPS,
NPS Allelix and the Trustee in connection with the Plan of Arrangement, a copy
of which is attached to this Circular as Appendix F;

"Voting Rights" means the rights of the registered holders of Exchangeable
Shares to direct the voting of the NPS Special Voting Share in accordance with
the Voting and Exchange Trust Agreement.

                                      E-9
<PAGE>

                REPORTING CURRENCIES AND ACCOUNTING PRINCIPLES

  The historical financial statements of Allelix contained in this Circular are
reported in Canadian dollars and have been prepared in accordance with Canadian
GAAP. The historical financial statements of NPS and the unaudited pro forma
condensed combined financial statements contained in this Circular are reported
in U.S. dollars and have been prepared in accordance with U.S. GAAP.

                          CANADIAN/U.S. EXCHANGE RATES

  In this Circular, dollar amounts are expressed in Canadian dollars unless
otherwise indicated.

  The following table sets forth, for each period indicated, the high and low
exchange rates for one U.S. dollar expressed in Canadian dollars, the average of
such exchange rates on the last day of each month during such period, and the
exchange rate at the end of such period, in each case, based upon the Noon Spot
Rate.

<TABLE>
<CAPTION>
                                                                                     Three Months  Six Months  Nine Months
                                                 Year Ended          Year Ended         Ended        Ended        Ended
                                                 August 31           December 31       March 31     June 30    September 30
                                            ------------------  -------------------  ------------  ----------  ------------
                                               1998      1999      1997       1998       1999         1999         1999
                                            ----------  ------  -----------  ------  ------------  ----------  ------------
          <S>                               <C>         <C>     <C>          <C>     <C>           <C>         <C>
          High............................      1.5845  1.5615       1.4399  1.5845        1.5475      1.5475        1.5475
          Low.............................      1.3692  1.4460       1.3345  1.4040        1.4840      1.4460        1.4460
          Average.........................      1.5545  1.5068       1.3846  1.4835        1.5113      1.4921        1.4970
          Period End......................      1.5353  1.4923       1.4267  1.5422        1.5175      1.4691        1.4768
</TABLE>

  On September 27, 1999 and on November 8, 1999, the exchange rate for one U.S.
dollar expressed in Canadian dollars was $1.4695 and $1.4685, respectively, in
each case based on the Noon Spot Rate.

                 INFORMATION CONCERNING NPS AND ITS AFFILIATES

  All information in this Circular relating to NPS and/or its Affiliates is
based solely upon publicly available sources and information provided to Allelix
by NPS. As such, Allelix assumes no responsibility for the information in this
Circular relating to NPS and/or its Affiliates.

                                     E-10
<PAGE>

                                    SUMMARY

  The following is a summary of certain information contained in this Circular.
This summary is not intended to be complete and is qualified in its entirety by
the more detailed information and financial statements, including the notes
thereto, contained elsewhere in this Circular. Allelix Shareholders should read
the entire Circular, including the Appendices. Capitalized terms used in this
summary are defined in the Glossary of Terms or elsewhere in this Circular.

Business of NPS

  NPS was incorporated in the State of Utah in 1986 and reincorporated in the
State of Delaware in 1992 and is engaged in the discovery and development of
novel, small molecule drugs that address a variety of important diseases. NPS,
along with its licensees, is actively researching and developing drug therapies
for important medical conditions such as hyperparathyroidism, osteoporosis,
pain, epilepsy, bipolar disorder, brain damage from stroke or head trauma and
diabetes.

  As of December 31, 1998, NPS' total assets were U.S.$48.1 million and for the
year ended December 31, 1998, NPS' revenues and net losses were U.S.$3.6 million
and U.S.$17.2 million, respectively. For the nine month period ended September
30, 1999, NPS' revenues and net losses were U.S.$2.7 million and
U.S.$15.4 million, respectively.

  NPS' principal executive office is located at 420 Chipeta Way, Salt Lake City,
Utah, 84108 and its telephone number is (801) 583-4939.

Business of Allelix

  Allelix is a biopharmaceutical company that applies proprietary technologies
to the identification of disease targets and to the discovery, design and
development of novel pharmaceutical products. Products are commercialized in
partnership with leading biotechnology and multinational pharmaceutical
companies for global markets and by Allelix itself for niche market indications.

  As of August 31, 1999, Allelix's total assets were $50.5 million and for the
year ended August 31, 1999, Allelix's revenues and net losses were $13.7 million
and $38.6 million, respectively.

  Allelix's principal executive office is located at 6850 Goreway Drive,
Mississauga, Ontario, L4V 1V7 and its telephone number is (905) 677-0831.

Date, Place and Purpose of the Allelix Meeting

  The Allelix Meeting will be held at TSE Place, The Exchange Tower, 2 First
Canadian Place, 130 King Street West, Toronto, Ontario on Wednesday, December
15, 1999 at 2:00 p.m. (Toronto time). The purpose of the Allelix Meeting is,
among other things, for: (i) the Allelix Common Shareholders and the Allelix
Preferred Shareholder to consider and, if determined advisable, approve the
Continuance Resolution; (ii) the class consisting of Allelix Common Shareholders
and the class consisting of the Allelix Preferred Shareholder to each,
separately, consider and, if determined advisable, approve the Arrangement
Resolution; (iii) the Allelix Common Shareholders to consider and, if determined
advisable, approve the Option Resolution; and (iv) the Allelix Common
Shareholders to receive and consider the consolidated financial statements of
Allelix for the fiscal year ended August 31, 1999, together with the auditors'
report thereon.

Allelix Shareholders Entitled to Vote

  Each Allelix Common Shareholder and each Allelix Preferred Shareholder at the
close of business (Toronto time) on the Record Date is entitled to attend the
Allelix Meeting in person or by proxy and to cast one vote for each Allelix
Common Share and each Allelix Preferred Share held by it on the Record Date. The
Allelix Common Shareholders and Allelix Preferred Shareholder will vote together
in respect of the Continuance Resolution and, subject to any further order of
the Court, as separate classes in respect of the Arrangement Resolution. The
Allelix Common Shareholders (excluding the insiders affected by the amendments
contemplated by such resolution) will vote in respect of the Option Resolution.

  On November 8, 1999, the total number of votes entitled to be cast at the
Allelix Meeting by the Allelix Common Shareholders was 20,126,232, the total
number of votes entitled to be cast at the Allelix Meeting by the Allelix
Preferred Shareholder was 1,000; and therefore the aggregate total number of
votes entitled to be cast at the Allelix Meeting by the Allelix Common
Shareholders and the Allelix Preferred Shareholder collectively was 20,127,232.

Vote Required

                                     E-11
<PAGE>

  The Continuance Resolution must be approved by at least 66 2/3 percent of the
votes cast by the Allelix Common Shareholders and the Allelix Preferred
Shareholder present in person or by proxy and entitled to vote at the Allelix
Meeting (excluding spoiled, illegible and/or defective votes and abstentions).

  Subject to any further order of the Court, the Arrangement Resolution must be
approved by at least (i) 66 2/3 percent of the votes cast by the Allelix Common
Shareholders present in person or by proxy and entitled to vote at the Allelix
Meeting (excluding spoiled, illegible and/or defective votes and abstentions);
and (ii) 66 2/3 percent of the votes cast by the Allelix Preferred Shareholder
present in person or by proxy and entitled to vote at the Allelix Meeting
(excluding spoiled, illegible and/or defective votes and abstentions).

  The Option Resolution must be approved by more than 50 percent of the votes
cast by the Allelix Common Shareholders present in person or by proxy and
entitled to vote at the Allelix Meeting (excluding spoiled, illegible and/or
defective votes and abstentions), excluding the votes of insiders affected by
the amendments contemplated by such resolution.

  To the best of the knowledge of the directors and officers of Allelix, on
November 8, 1999, no Person beneficially owned or exercised control or direction
over Allelix Common Shares carrying more than 10 percent of the number of votes
entitled to be cast at the Allelix Meeting by the Allelix Common Shareholders,
other than BVF Partners L.P. which held 2,400,000 Allelix Common Shares,
representing 11.9 percent of the Allelix Common Shares issued and outstanding.

  To the best of the knowledge of the directors and officers of Allelix, on
November 8, 1999, J&J beneficially owned or exercised control or direction over
all 1,000 Allelix Preferred Shares representing 100 percent of the Allelix
Preferred Shares issued and outstanding.

  On November 8, 1999, the directors and officers of Allelix as a group
beneficially owned or had voting control or direction over 4,394,329 Allelix
Common Shares carrying approximately 21.8 percent of the number of votes
entitled to be cast at the Allelix Meeting by the Allelix Common Shareholders.

The Continuance of Allelix

  Allelix will be continued from the federal jurisdiction as a corporation under
the OBCA in order to facilitate the Arrangement. Allelix is currently governed
by the CBCA. Subject to approval by Allelix Shareholders, Allelix proposes to
file articles of continuance to continue Allelix from the federal jurisdiction
under the provisions of the OBCA as soon as practicable after approval of the
Continuance Resolution at the Allelix Meeting. Allelix Shareholders will be
asked to consider, and if determined advisable, approve the Continuance
Resolution in the form attached to this Circular as Appendix A.

The Arrangement

  The Arrangement provides for the combination of Allelix and NPS in a
transaction in which:

1. each Allelix Common Shareholder who properly completes and files a Letter of
   Transmittal and Election Form with the Depositary on or before the Election
   Deadline who is:

   (a) a Canadian Resident, will receive, at his or her or its option, 0.3238
       Exchangeable Shares or 0.3238 NPS Common Shares for each Allelix Common
       Share held; or

   (b) not a Canadian Resident, will receive 0.3238 NPS Common Shares for each
       Allelix Common Share held;

2. each Allelix Common Shareholder (other than a Dissenting Shareholder) who
   does not properly complete and file a Letter of Transmittal and Election Form
   with the Depositary on or before the Election Deadline whose address as shown
   in the register of Allelix Common Shares as of the close of business (Toronto
   time) on the day before the Effective Date is:

   (a) in Canada, will be entitled to receive 0.3238 Exchangeable Shares for
       each Allelix Common Share held; or

   (b) not in Canada, will be entitled to receive 0.3238 NPS Common Shares for
       each Allelix Common Share held;

3. each holder of Allelix Warrants will be entitled, after the Effective Time
   and in accordance with the terms of the Allelix Warrants, upon the exercise
   of such warrants, to receive in lieu of the number of Allelix Common Shares
   to which such holder was theretofore entitled to receive upon such exercise,
   that aggregate number of Exchangeable Shares or NPS Common Shares, as
   applicable, that such holder would have been entitled to receive under the
   Plan of Arrangement if such holder had been the registered holder of that
   number of Allelix Common Shares that such holder was theretofore entitled to
   receive if all such holder's Allelix Warrants had been exercised immediately
   prior to the Effective Time;

                                     E-12
<PAGE>

4. each holder of Allelix Options will be entitled, after the Effective Time and
   in accordance with the terms of the Allelix Options, upon the exercise of
   such options, to receive in lieu of the number of Allelix Common Shares to
   which such holder was theretofore entitled to receive upon such exercise,
   that aggregate number of NPS Common Shares, that such holder would have been
   entitled to receive under the Plan of Arrangement if such holder had been the
   registered holder of that number of Allelix Common Shares that such holder
   was theretofore entitled to receive if all such holder's Allelix Options had
   been exercised immediately prior to the Effective Time;

5. the share conditions attached to the Allelix Preferred Shares shall be
   amended to provide that each Allelix Preferred Share will be automatically
   exchanged by no later than April 30, 2000 for that number of NPS Common
   Shares equal to the amount determined by dividing the stated value of each
   Allelix Preferred Share (U.S.$2,000) by 80 percent of the Current Market
   Price of the NPS Common Shares, which in any event, shall not be more than
   U.S.$27.79 or less than $10.38; and

6. the right and obligation of J&J (or any successor) to purchase Allelix Common
   Shares pursuant to section 1.2 of the Stock Purchase Agreement shall be
   deemed to be and shall become the right and obligation of J&J (or any
   successor) to purchase, by no later than April 30, 2000, that number of NPS
   Common Shares determined by dividing U.S.$2,000,000 by the Current Market
   Price of the NPS Common Shares, which in any event shall not be more than
   U.S.$27.79 or less than $12.20, without any further act or formality on the
   part of the parties.

   Allelix Common Shareholders who are not Canadian Residents will not be
entitled to elect to receive Exchangeable Shares. They will only receive NPS
Common Shares.

   As a result of the Arrangement, NPS and its Affiliates will become the sole
beneficial owners of all of the outstanding shares in the capital of Allelix.

   Pursuant to the terms of the Arrangement, NPS will be required to issue up to
approximately 7,567,202 NPS Common Shares (assuming the exchange of the Allelix
Preferred Shares at the minimum price per NPS Common Share of $10.38). On
November 8, 1999 there were 12,967,719 NPS Common Shares outstanding and on a
fully diluted basis, 15,070,970 NPS Common Shares outstanding. Consequently,
after completion of the Arrangement, existing Allelix Shareholders will
ultimately hold approximately 34.4 percent of the NPS Common Shares outstanding
and on a fully diluted basis, approximately 30.0 percent of the NPS Common
Shares outstanding (assuming exercise of all outstanding Allelix and NPS options
and warrants and assuming all Allelix shares, options and warrants are exchanged
for NPS Common Shares).

Effective Time

   It is anticipated that the Arrangement will become effective after the
required Allelix Shareholder and Court approvals have been obtained and are
final and all other conditions to closing have been satisfied or waived. As of
the date hereof, Allelix anticipates that the Arrangement will become effective
on or about December 21, 1999.

The Exchangeable Shares

   The Exchangeable Shares will be securities of NPS Allelix that are, as nearly
as practicable, the functional and economic equivalent of NPS Common Shares. The
Exchangeable Share Provisions, the Support Agreement and the Voting and Exchange
Trust Agreement will provide the registered holders of Exchangeable Shares with
the following rights:

   (a) the right to exchange such shares for NPS Common Shares on a one-for-one
       basis as discussed below;

   (b) the right to receive dividends, on a per share basis, in amounts (or
       property in the case of non-cash dividends) which are the same as, and
       which are payable at the same time as, dividends declared on NPS Common
       Shares;

   (c) the right to vote, on a per share equivalent basis, at all stockholder
       meetings at which NPS Common Shares are entitled to vote, through the
       medium of a special voting share in the capital of NPS carrying votes
       equal to the number of outstanding Exchangeable Shares; and

   (d) the right to participate, on a per share equivalent basis, in a
       liquidation, dissolution or other winding-up of NPS, on a pro rata basis
       with the registered holders of NPS Common Shares in the distribution of
       assets of NPS, through the medium of a mandatory exchange of Exchangeable
       Shares for NPS Common Shares.

   Each registered holder of Exchangeable Shares will be entitled at any time
following the Effective Time, upon delivery of a certificate representing
Exchangeable Shares and a duly executed Retraction Request, to require NPS
Allelix to redeem any or all of his, her or its Exchangeable Shares for NPS
Common Shares. However, NPS Holdings will have the right, but not the
obligation, to purchase the Exchangeable Shares that are the subject of the
Retraction Request for a purchase price payable in NPS Common Shares,

                                     E-13
<PAGE>

provided that such Retraction Request is not revoked by the retracting holder.

  The Exchangeable Shares will have no separate economic or voting rights in NPS
Allelix, except as required by law, including applicable provisions of the
Companies Act (Nova Scotia), or under the Exchangeable Share Provisions, the
Support Agreement and the Voting and Exchange Trust Agreement.

  Subject to Applicable Law and provided NPS Holdings has not exercised the
Redemption Call Right, NPS Allelix will on the Redemption Date redeem all but
not less than all of the then outstanding Exchangeable Shares for an amount per
share equal to the Current Market Price (as defined in the Exchangeable Share
Provisions) of a NPS Common Share on the last business day prior to the
Redemption Date, which will be satisfied in full by NPS Allelix causing to be
delivered to each holder of Exchangeable Shares one NPS Common Share for each
Exchangeable Share held by such holder, together with the Dividend Amount.

  Subject to the exceptions provided in the next sentence, the Redemption Date
will be on or after December 31, 2004. However, NPS Allelix will have the right
to cause the Redemption Date to occur at any time (i) if there are fewer than
1,000,000 Exchangeable Shares outstanding (other than those held by NPS and its
Affiliates); or (ii) on or after the occurrence of a NPS Control Transaction
where it is not reasonably practicable to substantially replicate the existing
terms and conditions of the Exchangeable Shares in connection with such NPS
Control Transaction.

Treatment of Options and Warrants

  Each holder of Allelix Options will be entitled, after the Effective Time and
in accordance with the terms of the Allelix Options, upon the exercise of such
options, to receive in lieu of the number of Allelix Common Shares to which such
holder was theretofore entitled to receive upon such exercise, that aggregate
number of NPS Common Shares that such holder would have been entitled to receive
under the Plan of Arrangement if such holder had been the registered holder of
that number of Allelix Common Shares that such holder was theretofore entitled
to receive if all such holder's Allelix Options had been exercised immediately
prior to the Effective Time.

  Each holder of Allelix Warrants will be entitled, after the Effective Time and
in accordance with the terms of the Allelix Warrants, upon the exercise of such
warrants, to receive in lieu of the number of Allelix Common Shares to which
such holder was theretofore entitled to receive upon such exercise, that
aggregate number of Exchangeable Shares or NPS Common Shares, as applicable,
that such holder would have been entitled to receive under the Plan of
Arrangement if such holder had been the registered holder of that number of
Allelix Common Shares that such holder was theretofore entitled to receive if
all such holder's Allelix Warrants had been exercised immediately prior to the
Effective Time.

Recommendation of the Board of Directors of Allelix

  The board of directors of Allelix has unanimously: (i) determined that the
Arrangement is fair to the Allelix Shareholders and that the Arrangement is in
the best interests of Allelix and the Allelix Shareholders; and (ii) approved
the Arrangement and the entering into and execution of the Arrangement
Agreement. Accordingly, the board of directors of Allelix unanimously recommends
that the Allelix Shareholders vote in favour of the Continuance and the
Arrangement.

Opinion of Allelix's Financial Adviser, BancBoston Robertson Stephens

  In connection with the Arrangement, the board of directors of Allelix received
a written opinion dated September 27, 1999 of Allelix's financial adviser,
BancBoston Robertson Stephens, that, as of that date, the Exchange Ratio was
fair, from a financial point of view, to the holders of Allelix Common Shares
(other than NPS, NPS Allelix and their respective Affiliates). The full text of
the opinion of BancBoston Robertson Stephens is attached to this Circular as
Appendix H and should be read carefully in its entirety for a description of the
assumptions made, matters considered and limitations on the review undertaken by
BancBoston Robertson Stephens in providing its opinion.

  The BancBoston Robertson Stephens opinion is directed to the board of
directors of Allelix and is not a recommendation to any Allelix Shareholder with
respect to any matter relating to the proposed Arrangement.

Conditions to Closing

  The Arrangement Agreement provides that the parties' obligations to complete
the Arrangement are subject to the satisfaction, on or before the Effective Date
or such other time as specified, of certain conditions precedent. These
conditions include, among others:

  (a) the Arrangement Resolution must have been duly approved by the required
      majority of Allelix Shareholders in accordance with the Interim Order, on
      or before January 20, 2000;

                                     E-14
<PAGE>

  (b) each of the resolutions considered at the NPS Meeting shall have been duly
      approved by the required majority of registered holders of NPS Common
      Shares without amendment on or before January 20, 2000;

  (c) the Final Order shall have been granted in form and substance satisfactory
      to Allelix and NPS, acting reasonably, on or before January 31, 2000, and
      shall not have been set aside or modified in a manner unacceptable to such
      parties on appeal or otherwise;

  (d) there shall not have occurred any actual or threatened change (including a
      proposal by the Minister of Finance of Canada to amend the ITA or any
      announcement, governmental or regulatory initiative, condition, event or
      development involving a change or a prospective change) that, in the
      judgment of NPS, acting reasonably, directly or indirectly, has or may
      have a Material Adverse Effect with respect to consummating the proposed
      transaction; and

  (e) registered holders of not more than 10 percent of Allelix's Common Shares
      shall have exercised Dissent Rights.

Termination and Termination Fees and Expenses

  The Arrangement Agreement may be terminated in certain circumstances,
including:

  (a) by NPS if the board of directors of Allelix has withdrawn or varied, in a
      manner determined by NPS to be adverse to NPS, approval of the Arrangement
      Agreement or the Arrangement or its unanimous recommendation to the
      Allelix Common Shareholders;

  (b) by Allelix if the board of directors of NPS has withdrawn its unanimous
      recommendation to the registered holders of the NPS Common Shares to vote
      in favour of the resolutions contemplated in the Arrangement Agreement to
      be considered at the NPS Meeting; and

  (c) by Allelix in order to enter into a definitive written agreement with
      respect to a Superior Proposal, subject to compliance with certain
      conditions.

  Allelix is obligated to pay to NPS a fee of U.S.$2,000,000 if any of the
  following occur:

  (a) Allelix breaches its covenants or agreements in the Arrangement Agreement
      in any material respect;

  (b) NPS terminates the Arrangement Agreement because the board of directors of
      Allelix has withdrawn or varied, in a manner determined by NPS to be
      adverse to NPS, its approval of the Arrangement Agreement or the
      Arrangement or its unanimous recommendation to Allelix Common Shareholders
      unless the board of directors of Allelix has done so because of a Material
      Adverse Change affecting NPS, and such change is not attributable to a
      Material Adverse Change affecting Allelix;

  (c) Allelix terminates the Arrangement Agreement to enter into a definitive
      written agreement with respect to a Superior Proposal subject to
      compliance by Allelix with certain conditions; or

  (d) an Acquisition Proposal is announced (in this instance, the reference to
      10 percent of the Allelix Common Shares in the definition of Acquisition
      Proposal is deemed by the Arrangement Agreement to be a reference to 20
      percent of the Allelix Common Shares) and is not withdrawn more than two
      business days prior to the date of the Allelix Meeting, the Allelix Common
      Shareholders do not approve the Arrangement at the Allelix Meeting, and a
      significant transaction involving the acquisition of a material portion of
      the assets of Allelix or one or more of its Subsidiaries or Allelix Common
      Shares so as to hold not less than 20 percent or more of the Allelix
      Common Shares outstanding is completed with the Person who made the
      Acquisition Proposal or an Affiliate of such Person within the twelve
      months following the date of the Allelix Meeting.

  NPS is obligated to pay to Allelix a fee of U.S.$1,000,000 in the event that
NPS breaches a covenant or agreement on its part in the Arrangement Agreement in
any material respect, or the registered holders of the NPS Common Shares do not
approve the matters relating to the Arrangement considered at the NPS Meeting
except following a Material Adverse Change affecting Allelix. The fee shall be
increased to U.S.$2,000,000 in the event that the board of directors of NPS
withdraws or varies its unanimous recommendation to the registered holders of
NPS Common Shares in a manner determined by Allelix to be adverse to Allelix,
otherwise than because of a Material Adverse Change affecting Allelix.

Accounting Treatment

  NPS will account for the Transaction as a purchase for financial reporting and
accounting purposes, in accordance with U.S. GAAP.

                                     E-15
<PAGE>

Stock Exchange Listings

  The TSE has conditionally approved the listing of the Exchangeable Shares,
subject to the satisfaction of its customary requirements. NPS has informed
Allelix that, at this time, it does not intend to list the Exchangeable Shares
on any other stock exchange or quotation system.

  The NPS Common Shares are traded on the NASDAQ Stock Market.

Certain Tax Considerations

  Allelix Common Shareholders should carefully read the information under
"Income Tax Considerations for Allelix Common Shareholders" which qualifies the
information set forth below. The following summary of income tax considerations
is intended as a general summary and does not discuss all of the facts and
circumstances that may affect the tax liability of particular Allelix Common
Shareholders. Therefore, all Allelix Common Shareholders are urged to consult
their tax advisers. No advance income tax rulings have been sought or obtained
with respect to any of the transactions described herein.

  For Canadian federal income tax purposes, an Allelix Common Shareholder who is
a Canadian Resident, holds Allelix Common Shares as capital property and who
properly elects to receive NPS Common Shares pursuant to the Arrangement, will
realize a capital gain (or a capital loss) equal to the amount by which the sum
of the fair market value of the NPS Common Shares received by such holder on the
exchange, net of any reasonable costs of disposition, exceeds (or is less than)
the adjusted cost base to such holder of the Allelix Common Shares exchanged. An
Allelix Common Shareholder who is an Eligible Holder and who exchanges Allelix
Common Shares for Exchangeable Shares will be permitted to elect jointly with
NPS Allelix, in prescribed form pursuant to section 85 of the ITA, to obtain a
tax-deferred "rollover" in respect of such exchange.

  The exchange by a U.S. Holder of Allelix Common Shares for NPS Common Shares
will be a taxable event for United States federal income tax purposes.

Dissent Rights

  Pursuant to section 190 of the CBCA, each Allelix Shareholder is entitled to
dissent from the Continuance Resolution and to be paid by Allelix, if the
Continuance becomes effective, the fair value of the Allelix Common Shares or
the Allelix Preferred Shares, as applicable, held by such holder in respect of
which such holder dissents, determined as of the day before the date on which
the Continuance Resolution is passed, provided that such holder gives written
notice of his, her or its dissent (a "Notice of Dissent") to Allelix by
depositing such Notice of Dissent with Allelix, or mailing it to Allelix by
registered mail, at its principal executive office at 6850 Goreway Drive,
Mississauga, Ontario, L4V 1V7, marked to the attention of the Senior Vice
President, Chief Financial Officer and Corporate Secretary of Allelix at or
before the Allelix Meeting, and otherwise complies with section 190 of the CBCA
as more fully described in the Circular. Failure to comply strictly with such
dissent procedures may result in the loss or unavailability of any right of
dissent.

  Pursuant to the Interim Order and section 190 of the CBCA, each Allelix Common
Shareholder is entitled to dissent from the Arrangement Resolution and to be
paid by Allelix, if the Arrangement becomes effective, the fair value of the
Allelix Common Shares held by such holder in respect of which such holder
dissents, determined as of the day before the date on which the Arrangement
Resolution is passed provided that such holder gives notice of dissent to
Allelix by depositing such Notice of Dissent with Allelix, or mailing it to
Allelix by registered mail, at its principal executive office at 6850 Goreway
Drive, Mississauga, Ontario, L4V 1V7, marked to the attention of the Senior Vice
President, Chief Financial Officer and Corporate Secretary of Allelix at or
before the Allelix Meeting, and otherwise complies with section 190 of the CBCA
as more fully described in the Circular. Failure to comply strictly with such
dissent procedures may result in the loss or unavailability of any right of
dissent.

  However, any one Allelix Common Shareholder is entitled to dissent from only
one of the Continuance Resolution or the Arrangement Resolution. The Dissent
Procedures are attached to this Circular as Appendix I.

Investment Considerations

  In addition to information set out elsewhere, Allelix Shareholders should
consider the information set out in this Circular under the heading "Investment
Considerations" in evaluating whether to approve the Arrangement.

                                     E-16
<PAGE>

                           GENERAL PROXY INFORMATION

General

  This Circular is furnished in connection with the solicitation of proxies by
and on behalf of the management of Allelix and the board of directors of
Allelix.

Solicitation of Proxies

  The management of Allelix is soliciting proxies for use at the Allelix Meeting
and has designated Dr. John R. Evans or, failing him, Paul J. Van Damme, on the
enclosed form of proxy as persons whom Allelix Shareholders may appoint as their
proxyholders. If an Allelix Shareholder wishes to appoint an individual not
listed on the enclosed form of proxy to represent him or her at the Allelix
Meeting, the Allelix Shareholder may do so either by crossing out the names on
the enclosed form of proxy and inserting the name of that other individual in
the blank space provided on the enclosed form of proxy or by completing another
acceptable form of proxy. A proxy nominee need not be an Allelix Shareholder. If
the Allelix Shareholder is a corporation, the proxy must be executed by an
officer or properly appointed attorney.

  Allelix is paying for this solicitation, which is being made by mail, with
possible supplemental telephone or other personal solicitations by employees or
agents of Allelix. The management of Allelix may retain the services of a proxy
solicitation company at the customary rates for such services.

Record Date and Entitlement to Vote

  The Record Date for the purpose of determining Allelix Shareholders entitled
to receive the Circular and to vote at the Allelix Meeting has been fixed as
5:00 p.m. (Toronto time) on November 10, 1999.

  Each Allelix Common Shareholder and the Allelix Preferred Shareholder at
5:00 p.m. (Toronto time) on the Record Date is entitled to attend the Allelix
Meeting in person or by proxy and to cast one vote for each Allelix Common Share
and each Allelix Preferred Share held by it on the Record Date. The Allelix
Common Shareholders and the Allelix Preferred Shareholder will vote together in
respect of the Continuance Resolution and as separate classes in respect of the
Arrangement Resolution.

Signing and Deposit of Proxies

  For a proxy to be valid, an Allelix Shareholder (or the Allelix Shareholder's
attorney, who must be authorized in writing) must sign and date it, and must
either return it in the envelope provided to, or deposit it at, the office of
Allelix or the office of CIBC Mellon Trust Company, 320 Bay Street, 6th Floor,
Toronto, Ontario, M5H 4A6 not later than 5:00 p.m. (Toronto time) on Monday,
December 13, 1999 or, if the Allelix Meeting is adjourned or postponed, 48 hours
(excluding Saturdays, Sundays and holidays) before the time the adjourned
Allelix Meeting is to be reconvened. Proxies may also be deposited with the
scrutineers of the Allelix Meeting, to the attention of the Chairman of the
Allelix Meeting, immediately prior to the commencement of the Allelix Meeting,
or any adjournment or postponement thereof.

Revocation of Proxies

  An Allelix Shareholder giving a proxy has the power to revoke such proxy at
any time before it is exercised. A proxy may be revoked (a) by instrument in
writing executed by the Allelix Shareholder or by his or her attorney authorized
in writing, or, if the Allelix Shareholder is a corporation, under its corporate
seal or by an officer or attorney thereof duly authorized and deposited either
at Allelix's registered office at 6850 Goreway Drive, Mississauga, Ontario L4V
1V7, at any time up to and including the last business day before the day of the
Allelix Meeting or any adjournment or postponement thereof, or with the Chairman
of the Allelix Meeting on the day of the Allelix Meeting or any adjournment or
postponement thereof, or (b) in any other manner permitted by law. If the
Allelix Shareholder attends the Allelix Meeting and participates in a vote taken
by a show of hands, it will automatically be revoking any valid proxy previously
delivered by it.

Voting of Proxies

  On any vote taken by a show of hands, the individuals named in the enclosed
form of proxy will vote the Allelix Common Shares and Allelix Preferred Shares
represented by proxy in accordance with the instructions of the Allelix
Shareholder who appointed them. If there are no instructions or the instructions
are not certain, on any vote taken by a show of hands they will vote the Allelix
Common Shares and/or the Allelix Preferred Shares, as applicable, in favour of
the Continuance Resolution, the Arrangement Resolution and the Option
Resolution. The enclosed form of proxy, when properly completed and signed,
confers discretionary authority on the appointed individuals to vote as they see
fit on any amendment or variation to any of the

                                     E-17
<PAGE>

matters identified in the Notice of Special Meeting and on any other matter that
may properly be brought before the Allelix Meeting. At the date hereof, neither
the board of directors of Allelix nor management of Allelix is aware of any
variation, amendment or other matter to be presented for a vote at the Allelix
Meeting.

Voting Shares

  On November 8, 1999, there were outstanding: (i) 20,126,232 Allelix Common
Shares; and (ii) 1,000 Allelix Preferred Shares. Each Allelix Common Share and
Allelix Preferred Share carries the right to one vote.

  To the best of the knowledge of the directors and officers of Allelix, on
November 8, 1999, no Person beneficially owned or exercised control or direction
over Allelix Common Shares carrying more than 10 percent of the number of votes
entitled to be cast at the Allelix Meeting by the Allelix Common Shareholders,
other than BVF Partners L.P. which held 2,400,000 Allelix Common Shares,
representing 11.9 percent of the Allelix Common Shares issued and outstanding.

  To the best of the knowledge of the directors and officers of Allelix, on
November 8, 1999, J&J beneficially owned or exercised control or direction over
all 1,000 Allelix Preferred Shares representing 100 percent of the Allelix
Preferred Shares issued and outstanding.

  On November 8, 1999, the directors and officers of Allelix as a group
beneficially owned or had voting control or direction over 4,394,329 Allelix
Common Shares carrying approximately 21.8 percent of the number of votes
entitled to be cast at the Allelix Meeting by the Allelix Common Shareholders.

Business of the Allelix Meeting

  The Allelix Meeting will be held for, among other things:

  (a) the Allelix Common Shareholders and the Allelix Preferred Shareholder to
      consider and, if determined advisable, approve the Continuance Resolution;

  (b) the class consisting of Allelix Common Shareholders and the class
      consisting of the Allelix Preferred Shareholder to each, separately,
      consider and, if determined advisable, approve the Arrangement Resolution;
      and

  (c) the Allelix Common Shareholders to consider and, if determined advisable,
      approve the Option Resolution:

  Each of these matters is discussed in more detail below.

Required Votes to Approve the Continuance Resolution, the Arrangement Resolution
and the Option Resolution

  The Continuance Resolution must be approved by at least 66 2/3 percent of the
votes cast by the Allelix Shareholders present in person or by proxy and
entitled to vote at the Allelix Meeting (excluding spoiled, illegible and/or
defective votes and abstentions).

  Subject to any further order of the Court, the Arrangement Resolution must be
approved by at least (i) 66 2/3 percent of the votes cast by the Allelix Common
Shareholders present in person or by proxy and entitled to vote at the Allelix
Meeting (excluding spoiled, illegible and/or defective votes and abstentions);
and (ii) 66 2/3 percent of the votes cast by the Allelix Preferred Shareholder
present in person or by proxy and entitled to vote at the Allelix Meeting
(excluding spoiled, illegible and/or defective votes and abstentions).

  The Option Resolution must be approved by more than 50 percent of the votes
cast by the Allelix Common Shareholders present in person or by proxy and
entitled to vote at the Allelix Meeting (excluding spoiled, illegible and/or
defective votes and abstentions), excluding the votes of insiders affected by
the amendments contemplated by such resolution.

Interest of Management

  Management is unaware of any material interest of any director or officer of
Allelix or any associate or Affiliate of any such individual or of Allelix in
any transaction since the beginning of the last completed financial year of
Allelix or in any proposed transaction or in connection with the Arrangement
that has materially affected or will materially affect Allelix or any of its
Affiliates.

                           THE CONTINUANCE OF ALLELIX

  Allelix is currently governed by the CBCA. Allelix will be continued from the
federal jurisdiction as a corporation under the OBCA in order to facilitate the
Arrangement. Subject to approval by Allelix Shareholders, Allelix proposes to
file articles of

                                     E-18
<PAGE>

continuance to continue Allelix from the federal jurisdiction under the
provisions of the OBCA as soon as practicable after approval of the Continuance
Resolution at the Allelix Meeting. Allelix Shareholders will be asked to
consider, and if thought fit, approve the Continuance Resolution in the form
attached to this Circular as Appendix A.

  In order for the Continuance to be implemented, the Continuance Resolution
must be passed by at least 662/3 percent of the votes cast by Allelix
Shareholders present in person or by proxy and entitled to vote, at the Allelix
Meeting (excluding spoiled, illegible and/or defective votes and abstentions).

  If the Continuance is approved, Allelix intends to file articles of
continuance pursuant to section 180 of the OBCA. The Continuance will be
effective on the date of the certificate of continuance, which shall be issued
by the OBCA Director upon receipt of articles of continuance pursuant to
subsection 180(4) of the OBCA. Allelix must file a certified copy of the
certificate of continuance with the Director under the CBCA.

  For a discussion of the Dissent Right in respect of the Continuance, please
see "Dissenting Shareholder Rights".

                                THE ARRANGEMENT

Background of the Arrangement

  At a meeting of the board of directors of Allelix held in January 1999,
BancBoston Robertson Stephens was invited to discuss strategic alternatives
available to Allelix to maximize shareholder value. The discussion included a
review of potential merger candidates among comparably sized biotechnology
companies, acquisition candidates among smaller biotechnology companies and
potential acquirers of Allelix among various larger biotechnology and/or
pharmaceutical companies. Following discussion thereon, no determination was
made as to the course that Allelix should follow at that meeting. Subsequently,
in the middle of March 1999, management of Allelix was approached by a mid-size
U.S.-based biotechnology company concerning a potential merger transaction. At a
meeting of the board of directors of Allelix held on April 14, 1999, Allelix's
senior management made a presentation to the board concerning a potential merger
with this company. The board of directors of Allelix authorized management to
pursue negotiations and due diligence investigations and appointed a
subcommittee comprised of four outside directors to oversee the conduct of
negotiations. Such negotiations continued into the summer of 1999; however, in
the middle of July, 1999, as a result of disagreements concerning the economic
basis of such a merger, negotiations with that company were terminated.

  At a meeting of the board of directors of Allelix held on July 29, 1999 and
July 30, 1999, the board again reviewed strategic alternatives open to Allelix
and authorized management to pursue alternatives with a view to maximizing
shareholder value. In connection with such mandate, the board authorized the
engagement of BancBoston Robertson Stephens to assist Allelix in its exploration
of various strategic alternatives available to it.

  In early August, 1999, one of Allelix's significant shareholders contacted
management to suggest that NPS might be interested in pursuing a merger with
Allelix. Shortly thereafter, Mr. Graham Strachan called Dr. Hunter Jackson,
Chairman, President and Chief Executive Officer of NPS to determine whether NPS
would be interested in pursuing a merger. During mid-August, discussions between
representatives of Allelix and NPS and their respective financial advisers
commenced. On August 10, 1999, Allelix entered into a confidential disclosure
agreement with NPS to permit mutual due diligence investigations to begin
between Allelix and NPS. On August 31, 1999, an exclusivity agreement was
entered into between Allelix and NPS, committing Allelix to a period of
exclusive negotiations with NPS, subject to a customary "fiduciary out" which
terminated on September 13, 1999, unless due diligence investigations and/or
negotiations were continuing at that date, in which event such period of
exclusivity of negotiations would be extended until September 30, 1999.

  On September 13, 1999, Allelix received a letter from NPS outlining the
proposed financial and other terms of a merger. On September 14, 1999,
representatives of Allelix, together with their legal advisers, Stikeman,
Elliott, met with representatives of NPS and their legal advisers, Blake,
Cassels & Graydon, to discuss and commence negotiations of the definitive terms
and structure of a proposed merger transaction. During this period and until
September 27, 1999, the terms of a definitive arrangement agreement between NPS
and Allelix were being negotiated under the supervision of Allelix's Chairman,
Dr. John R. Evans.

  Later that same day, a meeting of the board of directors of Allelix was held
to report on such discussions and negotiations, to allow the directors to
receive briefings by counsel concerning the duties of directors in connection
with merger transactions and by BancBoston Robertson Stephens concerning the
financial and strategic aspects of a merger between NPS and Allelix.

  On September 21, 1999, NPS' senior management team made a presentation to
Allelix's board of directors and Allelix's financial advisers concerning the
benefits available to Allelix through a merger with NPS, NPS' vision for the
merged company and NPS' research programs and business. On September 27, 1999,
the board of directors of Allelix met to consider the proposed merger. At that
meeting, BancBoston Robertson Stephens made a presentation regarding its
financial analysis of the merger and delivered its verbal opinion (which was
subsequently confirmed in writing) described below under "Opinion of Allelix's
Financial Adviser,

                                     E-19
<PAGE>

BancBoston Robertson Stephens". At the same meeting, the board of directors of
Allelix received a report from Stikeman, Elliott on the terms of the arrangement
agreement that had been negotiated. Subject to finalization of certain matters,
the board of directors of Allelix authorized the entering into of the
arrangement agreement described below under "The Arrangement Agreement and
Related Agreements", which agreement was executed and delivered on the evening
of September 27, 1999.

Allelix's Reasons for the Arrangement and Recommendation of the Board of
Directors of Allelix

  The board of directors of Allelix has unanimously: (i) determined that the
Arrangement is fair to the Allelix Shareholders and that the Arrangement is in
the best interests of Allelix and the Allelix Shareholders; and (ii) approved
the Arrangement and the entering into and execution of the Arrangement
Agreement. Accordingly, the board of directors of Allelix unanimously recommends
that the Allelix Shareholders vote in favour of the Continuance and the
Arrangement.

  In reaching its determination and making this recommendation, the board of
directors of Allelix considered a number of factors, including the following:

  (a) based on the closing price of NPS Common Shares reported on the NASDAQ
      Stock Market on September 27, 1999, the last trading day prior to the
      public announcement of the Transaction, the Exchange Ratio represented a
      premium of approximately 22 percent over the average closing price of
      Allelix Common Shares reported on the TSE for the 30 trading day period
      prior to the first public announcement of the Transaction;

  (b) the combined business which results from the Arrangement will have
      significantly greater financial, business and scientific resources which
      may enable the combined business to more effectively develop and exploit
      its portfolio of drug product candidates and, in particular, may make it
      possible for Allelix to take forward into Phase III clinical trials its
      most advanced product program, ALX1-11, a recombinant form of human
      parathyroid hormone which has potential as a bone-growth therapy;

  (c) the complementary nature of Allelix's and NPS' respective portfolios of
      drug product candidates;

  (d) the combined business may be able to take advantage of NPS' U.S.
      biomedical industry connections and NPS' presence on the NASDAQ Stock
      Market while continuing to benefit from the Canadian biotechnology
      industry and its associated technical and financial resources;

  (e) the risks and limitations associated with Allelix attempting to pursue
      further development of its portfolio of drug product candidates as an
      independent entity;

  (f) the opinion dated September 27, 1999 of BancBoston Robertson Stephens,
      Allelix's financial adviser, that, as of that date, the Exchange Ratio was
      fair, from a financial point of view, to the Allelix Common Shareholders
      (other than NPS, NPS Allelix and their respective Affiliates);

  (g) Allelix Common Shareholders will be entitled to receive Exchangeable
      Shares or NPS Common Shares such that they will continue to participate in
      the biotechnology and pharmaceutical products industries through NPS,
      which has a significantly larger market capitalization than Allelix;

  (h) Canadian Resident Allelix Common Shareholders who hold Allelix Common
      Shares as capital property and file a joint election with NPS Allelix will
      generally be able to exchange their Allelix Common Shares for Exchangeable
      Shares under the Arrangement on a tax-deferred basis under Canadian
      federal income tax legislation (see "Income Tax Considerations for Allelix
      Common Shareholders -- Canadian Federal Income Tax Considerations");

  (i) Exchangeable Shares will not constitute foreign property under Canadian
      federal income tax legislation for certain exempt holders (see "Income Tax
      Considerations for Allelix Common Shareholders -- Canadian Federal Income
      Tax Considerations");

  (j) the terms and conditions of the Arrangement Agreement, including the
      termination and fee and expenses provisions thereof (see "The Arrangement
      Agreement and Related Agreements"); and

  (k) subject to any further order to the Court, the Arrangement must be
      approved by (i) a special resolution passed by not less than 66 2/3
      percent of the votes cast by each of the class of shareholders consisting
      of the Allelix Common Shareholders and the class of shareholders
      consisting of the Allelix Preferred Shareholder; and (ii) the Court which,
      Allelix is advised, will consider, among other things, the fairness of the
      Arrangement to each of the above classes of shareholders.

  In reaching its determination, the board of directors of Allelix also
considered and evaluated, among other things (i) information concerning the
business, operations, financial condition and prospects of Allelix and NPS; (ii)
current industry, economic and market

                                     E-20
<PAGE>

conditions and trends and its informed expectations of the future of the
biotechnology and pharmaceutical products industries; (iii) historical market
prices and trading information with respect to Allelix Common Shares and NPS
Common Shares; (iv) the anticipated synergies, cost reductions, improved balance
sheet and other operational advantages and efficiencies as a result of the
combination; and (v) the anticipated challenges associated with successfully
integrating the businesses of Allelix and NPS.

  The foregoing discussion of the information and factors considered and given
weight by the board of directors of Allelix is not intended to be exhaustive. In
reaching the determination to approve and recommend the Arrangement, the board
of directors of Allelix did not assign any relative or specific weights to the
foregoing factors which were considered, and individual directors may have given
different weights to different factors. The board of directors of Allelix is,
however, unanimous in its recommendation to the Allelix Shareholders that the
Arrangement Resolution be approved at the Allelix Meeting.

  The board of directors of Allelix realizes that there are certain risks
associated with the Transaction, including those set forth under "Investment
Considerations". However, the board of directors of Allelix believes that the
positive factors outweigh those risks, although there cannot be assurances in
this regard.

  In order to permit the Arrangement to occur, the board of directors of Allelix
unanimously recommends that Allelix be continued under the OBCA and that Allelix
Shareholders vote in favour of the Continuance at the Allelix Meeting.

Opinion of Allelix's Financial Adviser, BancBoston Robertson Stephens

  Allelix, under the direction of its board of directors, retained BancBoston
Robertson Stephens to act as its financial adviser in connection with its
exploration of various strategic alternatives available to it, including the
Arrangement. At the meeting of the board of directors of Allelix held on
September 27, 1999, BancBoston Robertson Stephens delivered its verbal opinion
(which was subsequently confirmed in writing) that, as of that date and based
upon the matters reviewed with the board, the Exchange Ratio was fair, from a
financial point of view, to the holders of Allelix Common Shares (other than
NPS, NPS Allelix and their respective Affiliates). A copy of BancBoston
Robertson Stephens' opinion dated September 27, 1999 is attached to this
Circular as Appendix H. Allelix Shareholders are urged to, and should, read the
full text of the BancBoston Robertson Stephens opinion for a complete
description of the factors considered, the assumptions made and the limitations
on the review undertaken by BancBoston Robertson Stephens in rendering its
opinion.

  The BancBoston Robertson Stephens opinion addresses only the fairness, from a
financial point of view, of the Exchange Ratio to the holders of Allelix Common
Shares (other than NPS, NPS Allelix and their respective Affiliates) and does
not constitute a recommendation to any Allelix Shareholder as to how to vote at
the Allelix Meeting. The summary of the BancBoston Robertson Stephens opinion
set forth in this Circular is qualified in its entirety by reference to the full
text of such opinion.

  BancBoston Robertson Stephens in its capacity as financial advisor to Allelix
in connection with the Arrangement, will receive an initial fee for the delivery
of its opinion and will receive an additional fee contingent upon the
consummation of the Arrangement. In addition, Allelix has agreed to indemnify
BancBoston Robertson Stephens for certain liabilities that might arise out of
its engagement.

  In the ordinary course of business, BancBoston Robertson Stephens may trade in
securities of Allelix and NPS for its own account and the account of its
customers and, accordingly, may at any time hold a long or short position in
such securities.

Procedures for Election and Exchange of Share Certificates

  Enclosed with this Circular is a Letter of Transmittal and Election Form which
is being delivered to Allelix Common Shareholders. The Letter of Transmittal and
Election Form, when properly completed and signed and returned together with a
certificate or certificates for Allelix Common Shares and all other required
documents, will enable each holder of Allelix Common Shares to obtain a
certificate for that number of Exchangeable Shares or NPS Common Shares, or a
combination thereof, as appropriate, equal to the number of Allelix Common
Shares previously held by such holder multiplied by the Exchange Ratio, in each
case, rounded up to the nearest whole number if such calculation results in a
fractional share. See "Transaction Mechanics and Description of Exchangeable
Shares -- Fractional Shares".

  Any use of the mails to transmit a certificate for Allelix Common Shares and a
related Letter of Transmittal and Election Form is at the risk of the holder
thereof. If these documents are mailed, it is recommended that registered mail,
with return receipt requested, properly insured, be used.

  A holder of Allelix Common Shares who is a Canadian Resident may elect under
the Arrangement to receive on exchange of its Allelix Common Shares either NPS
Common Shares or Exchangeable Shares by arranging for a properly completed and
signed Letter of Transmittal and Election Form, together with certificates
representing its Allelix Common Shares and all other required documents, to be
received by the Depositary, at one of the addresses set out on the last page of
the Letter of Transmittal and Election Form no later than the Election Deadline.
A holder of Allelix Common Shares who is not a Canadian Resident is entitled
under the

                                     E-21
<PAGE>

Arrangement to receive on exchange of its Allelix Common Shares, NPS Common
Shares by arranging for a properly completed and signed Letter of Transmittal
and Election Form, together with certificates representing its Allelix Common
Shares and all other required documents, to be received by the Depositary at one
of the addresses set out on the last page of the Letter of Transmittal and
Election Form no later than the Election Deadline.

  If the Depositary has not received a properly completed and signed Letter of
Transmittal and Election Form together with certificates representing Allelix
Common Shares and all other required documents on or prior to the Election
Deadline in respect of particular Allelix Common Shares, then those shares will
be treated under the Arrangement as follows: (i) each holder of Allelix Common
Shares whose address on the register for Allelix Common Shares as at the close
of business (Toronto time) on the day immediately preceding the Effective Date
is in Canada will be entitled to receive only Exchangeable Shares upon receipt
by the Depositary of a properly completed and signed Letter of Transmittal and
Election Form, together with certificates representing its Allelix Common Shares
and all other required documents, and (ii) each holder of Allelix Common Shares
whose address on the register for Allelix Common Shares as at the close of
business (Toronto time) on the day immediately preceding the Effective Date is
not in Canada will be entitled to receive only NPS Common Shares upon receipt by
the Depositary of a properly completed and signed Letter of Transmittal and
Election Form, together with certificates representing its Allelix Common Shares
and all other required documents.

  Certificates representing the appropriate number of Exchangeable Shares and/or
NPS Common Shares issuable to a former holder of Allelix Common Shares who has
complied with the procedures set out above, as soon as practicable after the
Effective Date (i) be forwarded to the holder at the address specified in the
Letter of Transmittal and Election Form by insured first class mail, or (ii) be
made available for pick up by the holder as requested by the holder in the
Letter of Transmittal and Election Form at the office of CIBC Mellon Trust
Company specified by the holder in the Letter of Transmittal and Election Form.

  Where a certificate for Allelix Common Shares has been destroyed, lost or
mislaid, the holder of such certificate should contact CIBC Mellon Trust Company
at (416) 643-5500 in the Toronto area, or toll free at 1-800-387-0825, regarding
the issuance of a replacement certificate upon the holder satisfying such
requirements as may be imposed by Allelix in connection with issuance of the
replacement certificate.

Transaction Mechanics and Description of Exchangeable Shares

The Arrangement

  Commencing at the Effective Time, the following shall occur and shall be
deemed to occur in the following order without any further act or formality:

  (a) each NPS Elected Share will be transferred by the holder thereof, without
      any act or formality on its part, to NPS Allelix in exchange for a
      fraction of a fully-paid and non-assessable NPS Common Share equal to the
      Exchange Ratio;

  (b) each Exchangeable Elected Share will be transferred by the holder thereof,
      without any act or formality on its part, to NPS Allelix in exchange for a
      fraction of a fully-paid and non-assessable Exchangeable Share equal to
      the Exchange Ratio;

  (c) each Allelix Common Share in respect of which a duly completed Letter of
      Transmittal and Election Form has not been deposited with the Depositary
      on or prior to the Election Deadline (other than (i) Allelix Common Shares
      held by Dissenting Shareholders who are ultimately entitled to be paid the
      fair value of the Allelix Common Shares held by them and (ii) Allelix
      Common Shares held by NPS or any Affiliate thereof which shall not be
      exchanged under the Arrangement and shall remain outstanding as Allelix
      Common Shares held by NPS or any affiliate thereof),

      (i)  in the case of an Allelix Common Shareholder whose address as shown
           in the register of Allelix Common Shares as of the close of business
           (Toronto time) on the day preceding the Effective Date is in Canada
           will be deemed to be an Exchangeable Elected Share and will be
           transferred by the holder thereof, without any act or formality on
           its part, to NPS Allelix in exchange for that number of fully paid
           and non-assessable Exchangeable Shares equal to the Exchange Ratio;
           and

      (ii) in the case of an Allelix Common Shareholder whose address as shown
           in the register of Allelix Common Shares as of the close of business
           (Toronto time) on the day preceding the Effective Date is not in
           Canada will be deemed to be a NPS Elected Share and will be
           transferred by the holder thereof, without any act or formality on
           its part, to NPS Allelix in exchange for a fraction of a fully-paid
           and non-assessable NPS Common Share equal to the Exchange Ratio;

  (d) in accordance with the terms of the Allelix Warrants, after the Effective
      Time, a holder of Allelix Warrants shall be entitled, upon the exercise of
      such warrants, to receive in lieu of the number of Allelix Common Shares
      to which such holder was theretofore entitled to receive upon such
      exercise, that aggregate number of Exchangeable Shares or NPS Common
      Shares, as applicable, that such holder would have been entitled to
      receive under the Plan of Arrangement if such holder had been the

                                     E-22
<PAGE>

      registered holder of that number of Allelix Common Shares that such holder
      was theretofore entitled to receive if all such holder's Allelix Warrants
      had been exercised immediately prior to the Effective Time. Each holder of
      Allelix Warrants who is a Canadian Resident will be entitled to receive
      Exchangeable Shares and each holder of Allelix Warrants who is not a
      Canadian Resident will be entitled to receive NPS Common Shares;

  (e) in accordance with the terms of the Allelix Options, after the Effective
      Time, a holder of Allelix Options shall be entitled, upon the exercise of
      such options, to receive in lieu of the number of Allelix Common Shares to
      which such holder was theretofore entitled to receive upon such exercise,
      that aggregate number of NPS Common Shares that such holder would have
      been entitled to receive under the Plan of Arrangement if such holder had
      been the registered holder of that number of Allelix Common Shares that
      such holder was theretofore entitled to receive if all such holder's
      Allelix Options had been exercised immediately prior to the Effective
      Time;

  (f) NPS shall issue to and deposit with the Trustee the Special Voting Share,
      in consideration of the payment to NPS of U.S.$1, to be thereafter held of
      record by the Trustee as trustee for and on behalf of, and for the use and
      benefit of, the registered holders of the Exchangeable Shares in
      accordance with the Voting and Exchange Trust Agreement;

  (g) Allelix and 1380390 will amalgamate and continue as one corporation under
      the OBCA upon the following terms:

      (i)   the name of the amalgamated corporation will be "NPS Allelix Corp.";

      (ii)  the shares of 1380390 shall be cancelled without any repayment of
            capital in respect thereof;

      (iii) the by-laws of the amalgamated corporation shall be the same as the
            by-laws of Allelix; and

      (iv)  no securities shall be issued and no assets shall be distributed by
            the amalgamated corporation in connection with the amalgamation;

  (h) the share conditions attached to the Allelix Preferred Shares shall be
      amended to provide that each Allelix Preferred Share will be automatically
      exchanged by no later than April 30, 2000 for that number of NPS Common
      Shares equal to the amount determined by dividing the stated value of each
      Allelix Preferred Share (U.S.$2,000) by 80 percent of the Current Market
      Price of the NPS Common Shares which in any event shall not be more than
      U.S.$27.79 or less than $10.38 and, without any act or formality on the
      part of the holder thereof, the name of each Allelix Preferred Shareholder
      will be removed from the register of Allelix Preferred Shareholders and
      added to the register of holders of NPS Common Shares and NPS Allelix will
      be recorded as the registered holder of the Allelix Preferred Shares so
      exchanged and will be deemed to be the legal and beneficial owner thereof;
      and

  (i) the right and obligation of J&J (or any successor) to purchase Allelix
      Common Shares pursuant to section 1.2 of the Stock Purchase Agreement
      shall be deemed to be and shall become the right and obligation of J&J (or
      any successor) to purchase, by no later than April 30, 2000, that number
      of NPS Common Shares determined by dividing U.S.$2,000,000 by the Current
      Market Price of the NPS Common Shares, which in any event shall not be
      more than U.S.$27.79 or less than $12.20, without any further act or
      formality on the part of the parties.

  As noted above, Allelix Common Shares held by NPS or any Affiliate thereof
will not be exchanged under the Arrangement. As a result, assuming no exercise
of Allelix Options or Allelix Warrants after the Record Date, after giving
effect to the Arrangement, Allelix's outstanding capital will consist of
20,126,232 Allelix Common Shares. Based on the Exchange Ratio, after completion
of the Arrangement, the existing Allelix Shareholders (assuming the exchange of
the Allelix Preferred Shares at a minimum price per NPS Common Share of $10.38)
will hold an aggregate of approximately 6,801,143 Exchangeable Shares and NPS
Common Shares. Assuming all Allelix Common Shares and Allelix Preferred Shares
are exchanged for NPS Common Shares, based upon the number of NPS Common Shares
outstanding as of November 8, 1999, and those issued pursuant to the
Arrangement, existing Allelix Shareholders will ultimately hold approximately
34.4 percent of the outstanding NPS Common Shares.

  See "-- Procedures for Election and Exchange of Share Certificates" for
procedures to be followed in order to obtain certificates representing the
Exchangeable Shares and the NPS Common Shares issuable pursuant to the
Arrangement.

Fractional Shares

  No certificates representing fractional Exchangeable Shares or fractional NPS
Common Shares will be delivered in exchange for Allelix Common Shares or Allelix
Preferred Shares pursuant to the Arrangement. Each Person otherwise entitled to
a fractional interest in an Exchangeable Share or to a fractional interest in a
NPS Common Share will receive a certificate evidencing that number of shares to
which such Person is entitled rounded up to the nearest whole number.

                                     E-23
<PAGE>

Retraction, Redemption and Call Rights; Purchase for Cancellation

  Retraction of Exchangeable Shares.  Subject to the Retraction Call Right, each
registered holder of Exchangeable Shares will be entitled at any time following
the Effective Time to retract (i.e., require NPS Allelix to redeem) any or all
of the Exchangeable Shares held by such holder for an amount per share equal to
the Retraction Price. Each registered holder of Exchangeable Shares may effect
such retraction by presenting a certificate or certificates to NPS Allelix or to
the Transfer Agent representing the number of Exchangeable Shares the holder
desires to retract together with a duly executed Retraction Request indicating
the number of Exchangeable Shares the holder desires to retract and the
Retraction Date upon which the holder desires to receive the Retraction Price,
and such other documents as may be required to effect the retraction of the
Retracted Shares. The retraction of Retracted Shares shall not affect the
obligation of NPS Allelix to pay dividends declared on the Retracted Shares and
unpaid prior to the date of their retraction.

  When a holder requests NPS Allelix to redeem Retracted Shares, NPS Holdings
will have an overriding Retraction Call Right to purchase on the Retraction Date
all but not less than all of the Retracted Shares, at a purchase price per share
equal to the Retraction Price plus, on the designated payment date therefor, to
the extent not paid by NPS Allelix, the Dividend Amount, if any. To the extent
that NPS Holdings pays the Dividend Amount in respect of the Retracted Shares,
NPS Allelix shall no longer be obligated to pay any declared and unpaid
dividends on such Retracted Shares. Upon receipt of a Retraction Request, NPS
Allelix will immediately notify NPS Holdings. NPS Holdings must then advise NPS
Allelix within 5 business days as to whether the Retraction Call Right will be
exercised. If NPS Holdings does not so advise NPS Allelix, NPS Allelix will
notify the holder as soon as possible thereafter that NPS Holdings will not
exercise the Retraction Call Right. If NPS Holdings advises NPS Allelix that NPS
Holdings will exercise the Retraction Call Right within such five business day
period, then, provided the Retraction Request is not revoked by the holder as
described below, the Retraction Request shall thereupon be considered only to be
an offer by the holder to sell the Retracted Shares to NPS Holdings in
accordance with the Retraction Call Right.

  A holder may revoke its Retraction Request, in writing, at any time prior to
the close of business on the business day immediately preceding the Retraction
Date, in which case the Retracted Shares will neither be purchased by NPS
Holdings nor be redeemed by NPS Allelix. If the holder does not revoke its
Retraction Request, on the Retraction Date, the Retracted Shares will be
purchased by NPS Holdings or redeemed by NPS Allelix, as the case may be, in
each case as set out above. NPS Allelix or NPS Holdings, as the case may be,
will deliver or cause the Transfer Agent to deliver (i) certificates,
representing the number of NPS Common Shares having an aggregate value equal to
the aggregate Retraction Price, registered in the name of the holder or in such
other name as the holder may request, and (ii) if applicable, a cheque for the
aggregate Dividend Amount to the holder at the address recorded in the
securities register or at the address specified in the holder's Retraction
Request or by holding the same for pick up by the holder at the registered
office of NPS Allelix or the office of the Transfer Agent as specified by NPS
Allelix, in each case less any amounts withheld on account of tax required to be
deducted and withheld therefrom.

  If, as a result of solvency requirements or Applicable Law, NPS Allelix is not
permitted to redeem all Retracted Shares tendered by a retracting holder, and
provided NPS Holdings has not exercised its Retraction Call Right with respect
to such Retracted Shares, NPS Allelix will redeem only those Retracted Shares
tendered by the holder (rounded down to a whole number of shares) as would not
be contrary to such provisions or Applicable Law and the Trustee, on behalf of
the holder of any Retracted Shares not so redeemed by NPS Allelix, will require
NPS to purchase such Retracted Shares on the Retraction Date pursuant to the
Exchange Right.

  Redemption of Exchangeable Shares.  Subject to Applicable Law and the
Redemption Call Right, on the Redemption Date, NPS Allelix will redeem all but
not less than all of the then outstanding Exchangeable Shares for an amount per
share equal to the Redemption Price plus the Dividend Amount. NPS Allelix will,
at least 60 days prior to the Redemption Date, or such number of days as the
board of directors of NPS Allelix may determine to be reasonably practicable
under the circumstances in respect of a Redemption Date arising in connection
with a NPS Control Transaction, provide the registered holders of Exchangeable
Shares with written notice of the proposed redemption of the Exchangeable Shares
by NPS Allelix or the purchase of the Exchangeable Shares by NPS Holdings
pursuant to the Redemption Call Right described below.

  On or after the Redemption Date and provided NPS Holdings has not exercised
its Redemption Call Right, upon the holder's presentation and surrender of the
certificates representing the Exchangeable Shares and such other documents as
may be required at the office of the Transfer Agent or the registered office of
NPS Allelix, NPS Allelix will deliver the Redemption Price together with the
Dividend Amount to such holder by mailing certificates, representing the number
of NPS Common Shares having an aggregate value equal to the aggregate Redemption
Price, registered in the name of the holder or such other name as the holder may
request and, if applicable, a cheque in payment of the Dividend Amount to the
holder at the address of the holder recorded in the securities register or by
holding the same for pick up by the holder at the registered office of NPS
Allelix or the office of the Transfer Agent as specified in the written notice
of redemption, in each case, less any amounts withheld on account of tax
required to be deducted and withheld therefrom.

  NPS Holdings will have an overriding Redemption Call Right to purchase on the
Redemption Date all but not less than all of the Exchangeable Shares then
outstanding (other than Exchangeable Shares held by NPS and its Affiliates) for
an amount per share equal

                                     E-24
<PAGE>

to the Redemption Price plus the Dividend Amount, if any. Upon the exercise of
the Redemption Call Right, registered holders will be obligated to sell their
Exchangeable Shares to NPS Holdings. If NPS Holdings exercises the Redemption
Call Right, NPS Allelix's right and obligation to pay any declared and unpaid
dividends in respect of the Exchangeable Shares so purchased by NPS Holdings
will be fully satisfied by the payment of the Dividend Amount.

  Early Redemption.  In certain circumstances, NPS Allelix has the right to
require a redemption of the Exchangeable Shares prior to December 31, 2004. An
early redemption may occur upon (i) there being fewer than 1,000,000
Exchangeable Shares outstanding (other than Exchangeable Shares held by NPS and
its Affiliates); or (ii) the occurrence of a NPS Control Transaction. The
accidental failure or omission to give any notice of redemption under clauses
(i) and (ii) of this paragraph to less than 10 percent of the registered holders
of Exchangeable Shares will not affect the validity of any such redemption.

  A NPS Control Transaction is any merger, amalgamation, tender offer, material
sale of shares or rights or interests therein or thereto or similar transactions
involving NPS, or any proposal to do so. If, prior to December 31, 2004, a NPS
Control Transaction occurs, provided that the board of directors of NPS Allelix
determines, in good faith and in its sole discretion, that it is not reasonably
practicable to substantially replicate the terms and conditions of the
Exchangeable Shares in connection with such NPS Control Transaction and that the
redemption of all but not less than all of the outstanding Exchangeable Shares
is necessary to enable the completion of such NPS Control Transaction in
accordance with its terms, the board of directors of NPS Allelix may accelerate
the Redemption Date to such date prior to December 31, 2004 as the board of
directors of NPS Allelix may determine, upon such number of days' prior written
notice to the registered holders of Exchangeable Shares as the board of
directors of NPS Allelix may determine to be reasonably practicable in such
circumstances.

  Purchase for Cancellation.  Subject to Applicable Law, NPS Allelix may at any
time and from time to time purchase for cancellation all or any part of the
outstanding Exchangeable Shares at any price by tender to all the registered
holders of record of Exchangeable Shares then outstanding or through the
facilities of any stock exchange on which the Exchangeable Shares are listed or
quoted at any price per share.

Voting, Dividend and Liquidation Rights of Registered Holders of Exchangeable
Shares; Withholding Rights

  On the Effective Date, NPS, NPS Allelix and the Trustee will enter into the
Voting and Exchange Trust Agreement in substantially the form attached hereto as
Appendix F.

  Voting Rights with Respect to NPS Allelix.  Except as required by law and by
Article 10 of the Exchangeable Share Provisions, the registered holders of
Exchangeable Shares are not entitled as such to receive notice of or attend any
meeting of shareholders of NPS Allelix or to vote at any such meeting. See
"Amendment and Approval" below.

  Voting Rights with Respect to NPS.  Pursuant to the Voting and Exchange Trust
Agreement, NPS will issue the NPS Special Voting Share to the Trustee for the
benefit of the registered holders (other than NPS and its Affiliates) of
Exchangeable Shares. The NPS Special Voting Share will have the number of votes,
which may be cast at any meeting at which registered holders of NPS Common
Shares are entitled to vote, equal to the number of outstanding Exchangeable
Shares held by Beneficiaries.

  Each Beneficiary on the record date for any meeting at which registered
holders of NPS Common Shares are entitled to vote will be entitled to instruct
the Trustee to exercise one of the votes attached to the NPS Special Voting
Share for each Exchangeable Share held by such Beneficiary. The Trustee will
exercise (either by proxy or in person) each vote attached to the NPS Special
Voting Share only as directed by the relevant Beneficiary and, in the absence of
instructions from a Beneficiary as to voting, will not exercise such votes. A
Beneficiary may, upon instructing the Trustee, obtain a proxy from the Trustee
entitling the Beneficiary to vote directly at the relevant meeting the votes
attached to the NPS Special Voting Share to which the Beneficiary is entitled.

  The Trustee will use reasonable efforts to mail or otherwise send to the
registered holders of Exchangeable Shares the notice of each meeting at which
the registered holders of NPS Common Shares are entitled to vote, together with
the related meeting materials and a statement as to the manner in which the
holder may instruct the Trustee to exercise the votes attaching to the NPS
Special Voting Share, such mailing or sending to commence on the same day as NPS
mails or otherwise sends such notice and materials to the registered holders of
NPS Common Shares. The Trustee will also send to the registered holders of
Exchangeable Shares copies of all information statements, interim and annual
financial statements, reports and other materials sent by NPS to the registered
holders of NPS Common Shares at the same time as such materials are sent to the
registered holders of NPS Common Shares. To the extent such materials are
provided to the Trustee by NPS, the Trustee will also send to the registered
holders of Exchangeable Shares all materials sent by third parties to registered
holders of NPS Common Shares, including dissident proxy circulars and tender and
exchange offer circulars, as soon as possible after such materials are delivered
to the Trustee.

  All rights of a holder of Exchangeable Shares to exercise votes attached to
the NPS Special Voting Share will cease upon the exchange (whether by
redemption, retraction or liquidation, or through the exercise of the related
Call Rights) of such Exchangeable

                                     E-25
<PAGE>

Shares for NPS Common Shares.

  Dividend Rights.  Registered holders of Exchangeable Shares will be entitled
to receive, subject to Applicable Law, dividends (i) in the case of a cash
dividend declared on the NPS Common Shares, in an amount in cash for each
Exchangeable Share corresponding to the cash dividend declared on each NPS
Common Share, (ii) in the case of a stock dividend declared on the NPS Common
Shares to be paid in NPS Common Shares, in such number of Exchangeable Shares
for each Exchangeable Share as is equal to the number of NPS Common Shares to be
paid on each NPS Common Share, or (iii) in the case of a dividend declared on
the NPS Common Shares in property other than cash or NPS Common Shares, in such
type and amount of property as is the same as, or economically equivalent to (as
determined by the board of directors of NPS Allelix in good faith and in its
sole discretion) the type and amount of property declared as a dividend on each
NPS Common Share. Cash dividends on the Exchangeable Shares are payable in U.S.
dollars or the Canadian Dollar Equivalent thereof, at the option of NPS Allelix.
The declaration date, record date and payment date for dividends on the
Exchangeable Shares will be the same as the relevant date for the corresponding
dividends on the NPS Common Shares.

  Liquidation Rights with Respect to NPS Allelix.  In the event of the
liquidation, dissolution or winding-up of NPS Allelix or any other proposed
distribution of the assets of NPS Allelix among its members for the purpose of
winding-up its affairs, each holder of Exchangeable Shares will have, subject to
Applicable Law, preferential rights to receive from NPS Allelix for each
Exchangeable Share held by such holder the NPS Allelix Liquidation Amount plus
the Dividend Amount. Upon the occurrence of such liquidation, dissolution or
winding-up, NPS Holdings will have an overriding Liquidation Call Right to
purchase all but not less than all of the outstanding Exchangeable Shares (other
than Exchangeable Shares held by NPS and its Affiliates) from the registered
holders thereof on the effective date of such liquidation, dissolution or
winding-up for an amount per share equal to the Liquidation Call Purchase Price
(equal to the Liquidation Amount) plus any Dividend Amount. In the event that
NPS Holdings exercises its Liquidation Call Right and pays the Liquidation
Amount, if any, the right of the holder of the Exchangeable Shares so purchased
to receive any Liquidation Amount from NPS Allelix shall be fully satisfied and
discharged.

  Upon the occurrence and during the continuance of a NPS Allelix Insolvency
Event, a holder of Exchangeable Shares will be entitled to instruct the Trustee
to exercise the Exchange Right with respect to any or all of the Exchangeable
Shares held by such holder, thereby requiring NPS to purchase such Exchangeable
Shares from the holder. As soon as practicable following the occurrence of a NPS
Allelix Insolvency Event or any event which may, with the passage of time and/or
the giving of notice, become a NPS Allelix Insolvency Event, NPS Allelix and NPS
will give written notice thereof to the Trustee. As soon as practicable
thereafter, the Trustee will notify each holder of Exchangeable Shares of such
event or potential event and will advise the holder of its rights with respect
to the Exchange Right. The purchase price payable by NPS for each Exchangeable
Share purchased under the Exchange Right will be satisfied by issuance of one
NPS Common Share plus, to the extent not paid by NPS Allelix on the designated
payment date therefor, the amount of all declared and unpaid dividends on each
such Exchangeable Share held by such holder on any dividend record date which
occurred prior to the closing of such purchase and upon receipt of such amount,
the holder shall no longer be entitled to receive any declared and unpaid
dividends from NPS Allelix.

  Liquidation Rights with Respect to NPS.  In order for the registered holders
of Exchangeable Shares to participate on a pro rata basis with the registered
holders of NPS Common Shares on the fifth business day prior to the effective
date of a Liquidation Event, each Exchangeable Share will, pursuant to the
Automatic Exchange Right, automatically be exchanged for an equivalent number of
NPS Common Shares plus, to the extent not paid by NPS Allelix on the designated
payment date therefor, the amount of all declared and unpaid dividends on each
such Exchangeable Share held by such holder on any dividend record date which
occurred prior to the date of such exchange and, upon receipt of the amount of
such declared and unpaid dividends, the right of the holder of the Exchangeable
Share to receive declared and unpaid dividends from NPS Allelix shall be fully
satisfied and discharged. Upon a holder's request and surrender of Exchangeable
Share certificates, duly endorsed in blank and accompanied by such instruments
of transfer as NPS may reasonably require, NPS will deliver to such holder
certificates representing an equivalent number of NPS Common Shares, plus a
cheque for the amount of such dividends, if any, for the Exchangeable Shares
exchanged by such holder pursuant to the Automatic Exchange Right. For a
description of certain NPS obligations with respect to the dividend and
liquidation rights of the registered holders of Exchangeable Shares, see "The
Arrangement Agreement and Related Agreements -- Support Agreement".

  Withholding Rights.  NPS, NPS Allelix and the Trustee will be entitled to
deduct and withhold from any consideration otherwise payable to any holder of
Exchangeable Shares or NPS Common Shares such amounts as NPS, NPS Allelix, NPS
Holdings or the Trustee is required or permitted to deduct and withhold with
respect to such payment under the ITA, the Code or any provision of provincial,
state, local or foreign tax law. Any amounts withheld will be treated for all
purposes as having been paid to the holder of the shares in respect of which
such deduction and withholding was made, provided that such withheld amounts are
actually remitted to the appropriate taxing authority. To the extent that the
amount so required to be deducted or withheld from any payment to a holder
exceeds the cash portion of the amount otherwise payable to the holder, NPS, NPS
Allelix, NPS Holdings or the Trustee may sell or otherwise dispose of such
portion of the consideration as is necessary to provide sufficient funds to NPS,
NPS Allelix, NPS Holdings or the Trustee, as the case may be, to enable it to
comply with such deduction or withholding requirement. NPS, NPS Allelix, NPS
Holdings or the Trustee must notify the holder of any such sale and remit to
such holder any unapplied balance of the net proceeds of

                                     E-26
<PAGE>

such sale. In the Voting and Exchange Trust Agreement, NPS will represent and
warrant that, based upon facts known to it as of the Effective Date, it has no
current intention to deduct or withhold from any dividend paid to registered
holders of Exchangeable Shares any amounts under the Code.

Ranking

  The Exchangeable Shares will be entitled to a preference over the common
shares in the capital of NPS Allelix and any other shares ranking junior to the
Exchangeable Shares with respect to the payment of dividends and the
distribution of assets in the event of a liquidation, dissolution or winding-up
of NPS Allelix, whether voluntary or involuntary, or any other distribution of
the assets of NPS Allelix among its members for the purpose of winding-up its
affairs. See "Information Concerning NPS Allelix -- Share Capital Matters".

Certain Restrictions

  NPS Allelix will not, without the approval of the registered holders of
Exchangeable Shares (as provided for under section 10.2 of the Exchangeable
Share Provisions and set forth below under the heading "Amendment and
Approval"):

  (a) pay any dividends on the common shares of NPS Allelix, or any other shares
      ranking junior to the Exchangeable Shares, other than stock dividends
      payable in common shares of NPS Allelix or any such other shares ranking
      junior to the Exchangeable Shares, as the case may be;

  (b) redeem, purchase or make any capital distribution in respect of common
      shares of NPS Allelix or any other shares ranking junior to the
      Exchangeable Shares;

  (c) redeem or purchase any other shares of NPS Allelix ranking equally with
      the Exchangeable Shares with respect to the payment of dividends or on any
      liquidation distribution; or

  (d) except pursuant to and in accordance with the terms of the Allelix
      Warrants, issue any Exchangeable Shares or any other shares of NPS Allelix
      ranking equally with, or superior to, the Exchangeable Shares other than
      by way of stock dividends to the registered holders of such Exchangeable
      Shares.

  The restrictions in paragraphs (a), (b), (c) and (d) above will not apply at
any time when the dividends on the outstanding Exchangeable Shares corresponding
to dividends declared and paid on the NPS Common Shares have been declared and
paid in full.

Amendment and Approval

  The rights, privileges, restrictions and conditions attaching to the
Exchangeable Shares may be added to, changed or removed only with the approval
of the registered holders thereof. Any such approval or any other approval or
consent to be given by the registered holders of Exchangeable Shares will be
deemed to have been sufficiently given if given in accordance with Applicable
Law subject to a minimum requirement that such approval or consent be evidenced
by a resolution passed by not less than three-quarters of the votes cast on such
resolution at a meeting of the registered holders of Exchangeable Shares duly
called and held at which registered holders of at least 10 percent of the then
outstanding Exchangeable Shares are present or represented by proxy. In the
event that no such quorum is present at such meeting within one-half hour after
the time appointed therefor, then the meeting will be adjourned to such place
and time (not less than 5 days later) as may be designated by the Chairman of
such meeting. At such adjourned meeting, the registered holders of Exchangeable
Shares present or represented by proxy may transact the business for which the
meeting was originally called and a resolution passed thereat by the affirmative
vote of not less than three-quarters of the votes cast on such resolution will
constitute the approval or consent of the registered holders of Exchangeable
Shares.

Allelix Preferred Shares

  On November 8, 1999 there were 1,000 Allelix Preferred Shares outstanding.
Pursuant to the share conditions attached to the Allelix Preferred Shares (the
"Preferred Share Conditions") the Allelix Preferred Shares automatically convert
into fully paid non-assessable Allelix Common Shares by no later than April 30,
2000. The Preferred Shares Conditions provide that each Allelix Preferred Share
is convertible at the option of the holder into that number of Allelix Common
Shares equal to the number determined by dividing the stated value of each
Allelix Preferred Share (U.S.$2,000) by the conversion price (the "Conversion
Price") being equal to 80 percent of the arithmetic average of the closing price
of the Allelix Common Shares on the TSE for the 20 trading days on which the
Allelix Common Shares were traded immediately preceding the conversion date,
subject to a maximum Conversion Price of U.S.$9.00 and a minimum Conversion
Price of $3.36. Pursuant to the Plan of Arrangement, the Preferred Share
Conditions shall be amended to provide that each Allelix Preferred Share will be
automatically exchanged by no later than April 30, 2000 for that number of NPS
Common Shares equal to the amount determined by dividing the stated value of
each Allelix Preferred Share (U.S.$2,000) by 80 percent of the Current Market
Price of the NPS Common Shares which in any event shall not be more than
U.S.$27.79 or less than

                                     E-27
<PAGE>

$10.38. The Current Market Price maximum and minimum amounts of U.S.$27.79 and
$10.38, respectively, were determined by dividing the corresponding amounts
currently provided for in the Preferred Share Conditions (U.S.$9.00 and $3.36,
respectively), by the Exchange Ratio.

  The Plan of Arrangement also provides that the right and obligation of J&J (or
any successor) to purchase Allelix Common Shares pursuant to section 1.2 of the
Stock Purchase Agreement shall be deemed to be and shall become the right and
obligation of J&J (or any successor) to purchase, by no later than April 30,
2000, that number of NPS Common Shares determined by dividing U.S.$2,000,000 by
the Current Market Price of the NPS Common Shares, which in any event shall not
be more than U.S.$27.79 or less than $12.20, without any further act or
formality on the part of the parties.

Options

  On November 8, 1999, there were outstanding Allelix Options which, when
vested, would be exercisable to acquire a total of 1,384,532 Allelix Common
Shares at prices between $0.75 and $22.45 with various expiry dates to September
21, 2009.

  Each holder of Allelix Options will be entitled, after the Effective Time and
in accordance with the terms of the Allelix Options, upon the exercise of such
options, to receive in lieu of the number of Allelix Common Shares to which such
holder was theretofore entitled to receive upon such exercise, that aggregate
number of NPS Common Shares that such holder would have been entitled to receive
under the Plan of Arrangement if such holder had been the registered holder of
that number of Allelix Common Shares that such holder was theretofore entitled
to receive if all such holder's Allelix Options had been exercised immediately
prior to the Effective Time.

  For information pertaining to the proposed reissuance of options to purchase
Allelix Common Shares held by certain insiders of Allelix and the proposed
variance of the exercise period of options held by certain directors of Allelix,
see "Option Resolution".

Warrants

  On November 8, 1999, there were outstanding Allelix Warrants which entitled
the registered holders thereof to acquire a total of 829,108 Allelix Common
Shares.

  Each holder of Allelix Warrants will be entitled, after the Effective Time and
in accordance with the terms of the Allelix Warrants, upon the exercise of such
warrants, to receive in lieu of the number of Allelix Common Shares to which
such holder was theretofore entitled to receive upon such exercise, that
aggregate number of Exchangeable Shares or NPS Common Shares, as applicable,
that such holder would have been entitled to receive under the Plan of
Arrangement if such holder had been the registered holder of that number of
Allelix Common Shares that such holder was theretofore entitled to receive if
all such holder's Allelix Warrants had been exercised immediately prior to the
Effective Time. Each holder of Allelix Warrants who is a Canadian Resident will
be entitled to receive Exchangeable Shares and each holder of Allelix Warrants
who is not a Canadian Resident will be entitled to receive NPS Common Shares.

Court Approval and Completion of the Arrangement

  The Arrangement requires approval by the Court. Prior to the mailing of this
Circular, Allelix obtained the Interim Order providing for the calling and
holding of the Allelix Meeting and other procedural matters. A copy of the
Interim Order is attached hereto as Appendix G. The Notice of Application for
the Final Order is attached to this Circular as Appendix G.

  Subject to the approval of the Continuance and the Arrangement by the Allelix
Shareholders at the Allelix Meeting, the hearing in respect of the Final Order
is scheduled to be held on December 17, 1999 at 10:00 a.m. (Toronto time) in the
Court at 393 University Avenue, Toronto, Ontario. Any Allelix Shareholder who
wishes to present evidence or argument at that hearing must file and deliver a
notice of appearance, and all materials on which it relies, in accordance with
the Rules of the Court and the provisions of the Interim Order. The Court will
consider, among other things, the fairness and reasonableness of the
Arrangement. The Court may approve the Arrangement in any manner the Court may
direct, subject to compliance with such terms and conditions, if any, as the
Court deems fit.

  Assuming the Final Order is granted and the other conditions to closing
contained in the Arrangement Agreement are satisfied or waived, it is
anticipated that the following will occur: the steps set forth in the Plan of
Arrangement will be completed; articles of continuance for Allelix will be filed
with the OBCA Director to give effect to the Continuance; Articles of
Arrangement for Allelix will be filed with the OBCA Director to give effect to
the Arrangement; the Voting and Exchange Trust Agreement and the Support
Agreement will be executed and delivered; and the various other documents
necessary to consummate the transactions contemplated under the Arrangement
Agreement will be executed and delivered.

  Subject to the foregoing, it is expected that the Effective Time will occur as
soon as practicable after the requisite Allelix Shareholder approval has been
obtained.

                                     E-28
<PAGE>

Accounting Treatment

  NPS has informed Allelix that it will account for the Transaction as a
purchase for financial reporting and accounting purposes, in accordance with
U.S. GAAP. Under the purchase method of accounting, the total cost of the
Transaction is allocated to the tangible and intangible assets acquired and
liabilities assumed based upon their respective fair values at the Effective
Date of the Transaction.

Stock Exchange Listing

Exchangeable Shares

  The TSE has been notified of the proposed Arrangement and has conditionally
approved the listing of the Exchangeable Shares, subject to the satisfaction of
customary requirements of the TSE. Allelix has been advised by NPS that it has
no current intention to list the Exchangeable Shares on any other stock exchange
in Canada or the United States.

NPS Common Shares

  The NPS Common Shares are traded on the NASDAQ Stock Market.

Resale of Exchangeable Shares and NPS Common Shares Received in the Arrangement

United States

  The Exchangeable Shares and NPS Common Shares issued pursuant to the
Arrangement will not be registered under the 1933 Act. Such shares will instead
be issued in reliance upon the exemption provided by section 3(a)(10) of the
1933 Act. Section 3(a)(10) exempts securities issued in exchange for one or more
outstanding securities from the general requirement of registration where the
terms and conditions of the issuance and exchange of such securities have been
approved by any court, after a hearing upon the fairness of the terms and
conditions of the issuance and exchange at which all Persons to whom such
securities will be issued have the right to appear. The Court is authorized to
conduct a hearing to determine the fairness of the terms and conditions of the
Arrangement, including the proposed issuance of securities in exchange for other
outstanding securities. The Court entered the Interim Order on November 2, 1999
and, subject to the approval of the Arrangement by the Allelix Shareholders, a
hearing on the fairness of the Arrangement will be held on December 17, 1999 by
the Court. See "The Arrangement -- Court Approval and Completion of the
Arrangement".

  The Exchangeable Shares and NPS Common Shares received in exchange for Allelix
Common Shares in the Arrangement will be freely transferable under United States
federal securities laws, except for Exchangeable Shares or NPS Common Shares
held by persons who are deemed to be "affiliates" (as such term is defined under
the 1933 Act) of Allelix prior to the Transaction. Exchangeable Shares or NPS
Common Shares held by such "affiliates" may be resold by them only in
transactions permitted by the resale provisions of Rule 145(d)(1), (2), or (3)
promulgated under the 1933 Act or as otherwise permitted under the 1933 Act.
Rule 145(d) provides a safe harbour for resales of securities received by
certain persons in transactions such as the Arrangement. Rule 145(d)(1)
generally provides that "affiliates" of Allelix may sell securities of NPS
received in the Arrangement if such sale is effected pursuant to the volume,
current public information and manner of sale limitations of Rule 144
promulgated under the 1933 Act, including Regulation S thereunder. These
limitations generally require that any sales made by such an affiliate in any 3
month period shall not exceed the greater of 1 percent of the outstanding shares
of the securities being sold or the average weekly trading volume over the 4
calendar weeks preceding the placement of the sell order and that such sales be
made in unsolicited, open market "brokers transactions". Rules 145(d)(2) and (3)
generally provide that the foregoing limitations lapse for non-Affiliates of NPS
after a period of 1 or 2 years, respectively, depending upon whether certain
currently available information continues to be available with respect to NPS.
Persons who may be deemed to be affiliates of an issuer generally include
individuals or entities that control, are controlled by, or are under common
control with, such issuer and may include certain officers and directors of such
issuer as well as principal shareholders of such issuer. Under Rule 904 of
Regulation S, persons who are not "affiliates" of NPS (or who are Affiliates of
NPS solely by virtue of holding a position as an officer or director of NPS) may
sell Exchangeable Shares if no "directed selling efforts" (as defined in Rule
902 of Regulation S) are made by the seller or any of its affiliates or any
person on their behalf, no offer is made to a person in the United States, and
either (i) at the time the buy order is originated, the buyer is outside the
United States, or the seller and any person acting on behalf of the seller
reasonably believes the buyer is outside the United States, or (ii) the
transaction is executed in, on or through the facilities of the TSE and neither
the seller nor any person acting on behalf of the seller knows that the
Transaction has been pre-arranged with a buyer in the United States. In the case
of sales by a person who is an officer or director of NPS and is an affiliate of
NPS solely by virtue of holding that position, no selling concession, fee or
other remuneration may be paid in connection with the offer or sale other than
the usual and customary broker's commission that would be received by a person
executing the transaction as agent. Additional conditions apply to resales by
persons who are Affiliates of NPS other than by virtue of holding a position as
an officer or director of NPS.

                                     E-29
<PAGE>

  NPS has agreed that the issuance of NPS Common Shares from time to time in
exchange for the Exchangeable Shares will be registered under the 1933 Act prior
to the Effective Time.

Canada

  NPS has advised Allelix that NPS has applied for rulings or orders of
securities regulatory authorities in Canada to permit the issuance of the
Exchangeable Shares and the NPS Common Shares that are issuable under the
Arrangement, upon exchange of Exchangeable Shares and upon exercise of the
Allelix Options and/or the Allelix Warrants. Application has also been made to
permit resale of those shares in various jurisdictions without restriction by
Persons other than a "control person", provided that no unusual effort is made
to prepare the market for any such resale or to create a demand for the
securities which are the subject of any such resale and no extraordinary
commission or consideration is paid in respect thereof.

Ongoing Canadian Reporting Obligations

  Upon completion of the Arrangement, NPS Allelix will be a reporting issuer in
all of the provinces of Canada. NPS has advised Allelix that applications have
been made for certain exemptions from statutory financial and reporting
requirements, including exempting insiders of NPS Allelix and Allelix from the
requirements of filing reports with respect to trades of NPS Allelix securities,
in all Canadian provinces on certain conditions, including that NPS files with
the relevant securities regulatory authorities copies of all documents required
to be filed by it with the SEC under the Exchange Act and that registered
holders of Exchangeable Shares receive all disclosure materials that are sent to
registered holders of NPS Common Shares resident in the United States, including
the annual report of NPS and all proxy solicitation materials. If such
exemptions are received, holders of Exchangeable Shares will receive annual and
interim financial statements of NPS in lieu of financial statements of NPS
Allelix.

Future Issuances of Shares

  NPS Allelix's authorized capital consists of 100,000,000 common shares, 100
preference shares and 10,000,000 Exchangeable Shares. The Exchangeable Shares
that are authorized may be issued, without approval of registered holders of
Exchangeable Shares, at such time or times, to such Persons and for such
consideration as NPS Allelix may determine, except as may otherwise be required
by Applicable Laws, regulations or stock exchange requirements and subject to
all dividends on the outstanding Exchangeable Shares corresponding to dividends
declared and paid on the outstanding NPS Common Shares having been declared and
paid at the relevant times. The TSE, on which it is anticipated that the
Exchangeable Shares will be listed, currently requires shareholder approval of
the issuance of shares in certain circumstances.

Expenses

  The combined estimated fees, costs and expenses of Allelix and NPS in
connection with the completion of the transactions contemplated by the
Arrangement Agreement including, without limitation, financial advisory fees,
filing fees, legal and accounting fees and printing and mailing costs are
anticipated to be approximately U.S.$3,000,000. These expenses are referred to
in Note 2(a) to the NPS and Allelix Unaudited Pro Forma Condensed Combined
Financial Statements included herein.

                               OPTION RESOLUTION

  On April 15, 1999 the board of directors of Allelix approved a proposal for
the surrender of options by Allelix employees (excluding non-executive
directors), to acquire an aggregate of 876,572 Allelix Common Shares with
exercise prices ranging from $3.20 to $22.45 per share and the re-issuance of
replacement stock options at an exercise price of $2.80 per share (the
"Proposal"). Pursuant to the Proposal each employee was permitted to surrender
for cancellation, at any time before the close of business on May 31, 1999, any
or all of his or her options (the "Old Options") for a number of new options
equal to one half of the aggregate number of options surrendered for
cancellation (the "New Options"). Except for a reduced exercise price the New
Options are in all other respects the same as the Old Options. In particular the
New Options are vested to the same extent and expire on the same date as the Old
Options. Old Options to acquire an aggregate of 410,664 Allelix Common Shares
held by non-insider employees were surrendered and New Options to acquire an
aggregate of 205,337 Allelix Common Shares were issued in respect thereof (in
each case rounded up to the nearest whole option). Three senior employees who
are insiders of Allelix have surrendered Old Options to acquire an aggregate of
225,600 Allelix Common Shares for cancellation, pending approval of Allelix
Common Shareholders.

  The board of directors of Allelix determined that the reduction of the
exercise price of the Old Options was necessary to achieve the purpose of
encouraging and increasing the incentive for the continued service of employees
of Allelix as stated in the Allelix Stock Option Plan.

  In addition, on November 1, 1999 the board of directors of Allelix approved an
amendment to options held by Allelix directors (other than Dr. John R. Evans,
Edward Rygiel and Dr. Calvin Stiller who will become directors of NPS) so that
such options will be exercisable until December 31, 2001 instead of expiring 90
days following the Effective Date pursuant to the terms of the Allelix

                                     E-30
<PAGE>

Stock Option Plan. The affected directors were not eligible to participate in
the Proposal described above and hold options with exercise prices ranging from
$4.40 to $16.80 per share. Notice of the re-issuance of employee options and the
variation of exercise period of options held by certain directors has been given
to the relevant stock exchanges.

  Holders of Allelix Common Shares are being asked to consider and if thought
advisable, pass the Option Resolution at the Allelix Meeting to confirm and
approve the re-issuance of options held by certain insiders of Allelix and the
variance of the exercise period of options held by certain directors of Allelix
as described above. Such resolution must be passed by a majority of the votes
cast at the Allelix Meeting by Allelix Common Shareholders, excluding the votes
of insiders affected by the amendments contemplated by such resolution.

                                     E-31
<PAGE>

                THE ARRANGEMENT AGREEMENT AND RELATED AGREEMENTS

     The following paragraphs summarize, among other things, the material
terms of the Arrangement Agreement.

Arrangement Agreement Amendments

     Pursuant to amendment agreements to the Arrangement Agreement dated as of
October 28, 1999 and November 15, 1999, Allelix and NPS agreed to minor
amendments to deadlines for the implementation of certain interim steps relating
to the Arrangement and changes to the form of Plan of Arrangement from that
originally prepared in order to finalize provisions relating to the treatment of
the Allelix Preferred Shares and the Stock Purchase Agreement under the
Arrangement.

Effective Date of the Arrangement

     After obtaining the Final Order and subject to the satisfaction or waiver
of the conditions set forth in the Arrangement Agreement, the Arrangement shall
become effective as of the date of the certificate of arrangement giving effect
to the Arrangement, issued pursuant to subsection 183(2) of the OBCA.

Termination

     The Arrangement Agreement may be terminated:

     (a) by the delivery by one party to another of a written notice stating
         that a condition precedent for the benefit of the party initiating such
         notice has not been fulfilled or satisfied within the time contemplated
         by the Arrangement Agreement and that the Arrangement Agreement is
         accordingly terminated;

     (b) by NPS if the board of directors of Allelix has withdrawn or varied, in
         a manner determined by NPS to be adverse to NPS, its approval of the
         Arrangement Agreement or the Arrangement or its unanimous
         recommendation to the Allelix Common Shareholders;

     (c) by Allelix if the board of directors of NPS has withdrawn its unanimous
         recommendation to the registered holders of the NPS Common Shares to
         vote in favour of the resolutions contemplated in the Arrangement
         Agreement to be considered at the NPS Meeting;

     (d) by Allelix in order to enter into a definitive written agreement with
         respect to a Superior Proposal, subject to compliance by Allelix with
         certain conditions;

     (e) by the mutual agreement of Allelix and NPS (without further action on
         the part of the registered Allelix Shareholders if terminated after the
         holding of the Allelix Meeting); or

     (f) by either NPS or Allelix if there has been passed any law or regulation
         that makes consummation of the transactions contemplated by the
         Arrangement Agreement illegal or otherwise prohibited or if any
         injunction, order or decree enjoining NPS or Allelix from consummation
         of the transactions contemplated by the Arrangement Agreement is
         entered into and such injunction, order or decree becomes final and
         non-appealable.

Termination Fees and Expenses

      Allelix is obligated to pay to NPS a fee of U.S.$2,000,000 if any of the
      following occur:

     (a) Allelix breaches its covenants or agreements in the Arrangement
         Agreement in any material respect;

     (b) NPS terminates the Arrangement Agreement because the board of directors
         of Allelix has withdrawn or varied in a manner determined by NPS to be
         adverse to NPS, its approval of the Arrangement Agreement or the
         Arrangement or its unanimous recommendation to the Allelix Shareholders
         unless the board of directors of Allelix has done so because of a
         Material Adverse Change affecting NPS, and such change is not
         attributable to a Material Adverse Change affecting Allelix;

     (c) Allelix terminates the Arrangement Agreement to enter into a definitive
         written agreement with respect to a Superior Proposal, subject to
         compliance by Allelix with certain conditions; or

     (d) an Acquisition Proposal is announced (in this instance, the reference
         to 10 percent of the Allelix Common Shares in the definition of
         Acquisition Proposal shall be deemed to be a reference to 20 percent of
         the Allelix Common Shares) and is not

                                     E-32
<PAGE>

         withdrawn more than two business days prior to the date of the Allelix
         Meeting, the registered holders of the Allelix Common Shares do not
         approve the Arrangement at the Allelix Meeting, and a significant
         transaction involving the acquisition of a material portion of the
         assets of Allelix or one or more of its subsidiaries or Allelix Common
         Shares so as to hold not less than 20 percent or more of the Allelix
         Common Shares outstanding is completed with the Person who made the
         Acquisition Proposal or an Affiliate of such Person within the twelve
         months following the date of the Allelix Meeting.

      NPS is obligated to pay to Allelix a fee of U.S.$1,000,000 in the event
that NPS breaches a covenant or agreement on its part in the Arrangement
Agreement in any material respect, or the registered holders of the NPS Common
Shares do not approve the matters relating to the Arrangement considered at the
NPS Meeting except following a Material Adverse Change affecting Allelix. The
fee shall be increased to U.S.$2,000,000 in the event that the board of
directors of NPS withdraws or varies its unanimous recommendation to the
registered holders of NPS Common Shares in a manner determined by Allelix to be
adverse to Allelix, otherwise than because of a Material Adverse Change
affecting Allelix.

Conditions to Closing

Mutual Conditions Precedent

     The Arrangement Agreement provides that the respective obligations of each
party to complete the Transaction are subject to the satisfaction, on or before
the Effective Date or at such other time specified below, of the following
conditions precedent:

     (a) the Interim Order shall have been granted in form and substance
         satisfactory to Allelix and NPS, acting reasonably, on or before
         November 12, 1999 and shall not have been set aside or modified in a
         manner unacceptable to such parties on appeal or otherwise;

     (b) the Arrangement Resolution shall have been duly approved by the
         required majority, with or without amendment, in accordance with the
         Interim Order, on or before January 20, 2000;

     (c) each of the resolutions relating to the Arrangement considered at the
         NPS Meeting shall have been duly approved by the required majority
         without amendment on or before January 20, 2000;

     (d) Allelix shall have obtained articles of continuance from the OBCA
         Director in form and substance satisfactory to Allelix and NPS, acting
         reasonably;

     (e) the Final Order shall have been granted in form and substance
         satisfactory to Allelix and NPS, acting reasonably, on or before
         January 31, 2000, and shall not have been set aside or modified in a
         manner unacceptable to such parties on appeal or otherwise;

     (f) the Articles of Arrangement relating to the Arrangement shall be in
         form and substance satisfactory to Allelix and NPS, acting reasonably;

     (g) the Effective Date shall be on or before January 31, 2000;

     (h) (i) no act, action, suit or proceeding shall have been taken or be
         outstanding before or by any domestic or foreign court or tribunal or
         governmental agency or other regulatory authority or administrative
         agency or commission by any elected or appointed public official or
         private person (including, without limitation, any individual,
         corporation, firm, group or other entity) in Canada or elsewhere,
         whether or not having the force of law, and (ii) no law, regulation or
         policy shall have been proposed, enacted, promulgated or applied which,
         in either case, has effect, or may have effect, to cease trade, enjoin,
         or prohibit the acquisition by NPS of the Allelix Common Shares, or the
         right of NPS to own or exercise full rights of ownership of the Allelix
         Common Shares, or the issuance, pursuant to the Arrangement, of NPS
         Common Shares and Exchangeable Shares to the Allelix Common
         Shareholders;

     (i) there shall not exist any prohibition at law against NPS or Allelix and
         Allelix Common Shareholders consummating the Arrangement;

     (j) Allelix and NPS shall have obtained the consents, approvals and
         authorizations referred to in section 3.18 of the Arrangement Agreement
         and such other material consents, approvals and authorizations (if
         any), regulatory or otherwise, required or necessary in connection with
         the transactions contemplated therein on terms and conditions
         satisfactory to each of them, acting reasonably;

     (k) the Exchangeable Shares issuable pursuant to the Arrangement shall have
         been conditionally approved for listing on the TSE subject to the
         filing of the usual and customary documentation;

                                     E-33
<PAGE>

     (l) any required orders from applicable securities authorities authorizing
         the issue of the Exchangeable Shares shall have been obtained on terms
         satisfactory to NPS and Allelix, both acting reasonably;

     (m) there shall not have occurred any actual or threatened change
         (including a proposal by the Minister of Finance of Canada to amend the
         ITA or any announcement, governmental or regulatory initiative,
         condition, event or development involving a change or a prospective
         change) that, in the judgment of NPS, acting reasonably, directly or
         indirectly, has or may have a Material Adverse Effect with respect to
         consummating the proposed transaction; and

     (n) registered holders of not more than 10 percent of Allelix's Common
         Shares shall have exercised Dissent Rights.

     The foregoing conditions are for the mutual benefit of Allelix and NPS and
may be waived, in whole or in part, by each of Allelix and NPS acting
individually for its own interest at any time. If any of the above conditions
precedent shall not be complied with or waived as aforesaid on or before the
date required for the performance thereof, either Allelix or NPS may, in
addition to the other remedies it may have at law or in equity, rescind and
terminate the Arrangement Agreement by written notice to the other party.

Conditions Precedent for the Benefit of Allelix

     The Arrangement Agreement provides that the obligation of Allelix to
complete the Transaction is subject to the satisfaction or waiver, where
permissible, of a number of additional conditions, including the following:

     (a) the representations and warranties made by NPS in the Arrangement
         Agreement shall be true as of the Effective Date as if made on and as
         of such date and NPS shall have provided to Allelix the certificate of
         one senior officer of NPS certifying such accuracy on the Effective
         Date (and Allelix shall have no knowledge to the contrary);

     (b) NPS shall have provided Allelix with opinions of NPS' counsel (which,
         except for the opinion referred to in section 7.2(1)(b)(viii) of the
         Arrangement Agreement, may be the opinion of NPS' Vice President,
         Corporate Development and Legal Affairs) in form and substance
         satisfactory to Allelix, acting reasonably, dated the Effective Date
         (or such other date as Allelix and NPS may agree) and addressed to
         Allelix and Allelix's Counsel to the effect that:

        (i)    NPS is duly incorporated and validly existing under the laws of
               the jurisdiction of its incorporation and has the corporate power
               and authority to carry on any business now conducted by it;

        (ii)   NPS has full corporate power and authority to enter into the
               Arrangement Agreement and to perform its obligations thereunder;

        (iii)  all necessary proceedings, corporate, regulatory or otherwise, of
               NPS have been taken to fully, validly and effectively authorize
               the Arrangement Agreement and the transactions contemplated
               therein including the Arrangement, the performance by NPS of its
               obligations thereunder, and the execution and delivery by NPS of
               the Arrangement Agreement and all documents delivered pursuant
               thereto;

        (iv)   each NPS Common Share to be issued under the Arrangement will be
               authorized and reserved for issuance and, when so issued, will be
               validly issued and outstanding as a fully paid and non-assessable
               share in the capital of NPS;

        (v)    the NPS Common Shares to be issued on exchange of an Exchangeable
               Share shall be immediately tradable upon the NASDAQ Stock Market;

        (vi)   the execution and delivery by NPS of the Arrangement Agreement
               and all documents delivered pursuant thereto, the performance by
               NPS of its obligations thereunder and the consummation of the
               transactions contemplated therein will not result in the breach
               of or violate any term or provision of the articles or by-laws of
               NPS;

        (vii)  the Arrangement Agreement has been duly executed and delivered by
               NPS and all agreements delivered pursuant to the terms thereof
               are valid and binding obligations of NPS enforceable against it
               in accordance with their respective terms, subject to
               enforceability being limited by applicable bankruptcy,
               insolvency, reorganization and other laws affecting creditors'
               rights generally and the discretionary nature of certain remedies
               (including specific performance and injunctive relief) and
               subject to the effectiveness of clauses providing rights of
               indemnity or exculpating a party or persons from a liability or a
               duty otherwise owed which may be limited by law; and

        (viii) the issuance of NPS Common Shares on exchange of an Exchangeable
               Share is exempt from the prospectus and registration requirements
               of the applicable securities laws in each applicable province and
               no filing, proceeding, consent or approval is required under such
               Applicable Law in connection with the issuance of such NPS Common
               Shares and that

                                     E-34
<PAGE>

               the NPS Common Shares acquired on exchange of an
               Exchangeable Share will not be subject to restrictions on their
               resale in such provinces, other than trades from a control block
               and excluding any outstanding escrow agreements, and in giving
               such opinion, NPS Counsel may rely in respect of matters of fact,
               upon certificates of senior officers of NPS or any other
               appropriate persons, and in respect of matters governed by the
               laws of any jurisdiction other than Delaware and Utah, NPS
               Counsel may deliver the opinion of local counsel in such other
               jurisdiction;

     (c) the appointment of three Allelix directors, to be jointly designated by
         NPS and Allelix, acting reasonably, to the board of directors of NPS;

     (d) NPS shall have complied with its covenants in the Arrangement Agreement
         and shall have provided to Allelix the certificate of a senior officer
         of NPS certifying that NPS has complied with its respective covenants
         therein and Allelix shall have no knowledge to the contrary;

     (e) between the date of the most recent public disclosure by NPS and the
         Effective Date, there shall not have occurred any Material Adverse
         Change with respect to NPS that is not attributable to a Material
         Adverse Change with respect to Allelix;

     (f) NPS, NPS Holdings and NPS Allelix shall have entered into the Support
         Agreement; and

     (g) NPS, NPS Allelix and a trust company acceptable to NPS and Allelix,
         acting reasonably, shall have entered into the Voting and Exchange
         Trust Agreement.

     The foregoing conditions precedent are for the benefit of Allelix and may
be waived, in whole or in part, by Allelix in writing at any time. If any of the
conditions shall not be complied with or waived by Allelix on or before the date
required for their performance then Allelix may, in addition to the other
remedies it may have at law or equity, rescind and terminate the Arrangement
Agreement by written notice to NPS.

Conditions Precedent for the Benefit of NPS

     The Arrangement Agreement provides that the obligation of NPS to complete
the Transaction is subject to the satisfaction or waiver, where permissible, of
a number of additional conditions, including the following:

     (a) the representations and warranties made by Allelix in the Arrangement
         Agreement shall be true as of the Effective Date as if made on and as
         of such date and Allelix shall have provided to NPS a certificate of
         the Chairman of the Board of Allelix and the Chief Executive Officer
         (or such other officer of Allelix that may be acceptable to NPS, acting
         reasonably) certifying such accuracy on the Effective Date (and NPS
         shall have no knowledge to the contrary);

     (b) Allelix shall have provided NPS with an opinion of Allelix Counsel in
         form and substance satisfactory to NPS, acting reasonably dated the
         Effective Date (or such other date as Allelix and NPS may agree) and
         addressed to NPS and NPS Counsel to the effect that:

         (i)   Allelix and each of its material Subsidiaries are duly
               incorporated, amalgamated, continued or formed and existing under
               the laws of the jurisdiction of their respective incorporation or
               formation, as the case may be, and each has the power and
               authority to carry on any business now conducted by it;

         (ii)  Allelix has full corporate power and authority to enter into the
               Arrangement Agreement and to perform its obligations thereunder;

         (iii) all necessary proceedings, corporate, regulatory or otherwise, of
               Allelix have been taken to fully, validly and effectively
               authorize the Arrangement Agreement and the transactions
               contemplated therein including the Arrangement, the performance
               by Allelix of its obligations thereunder, and the execution and
               delivery by Allelix of the Arrangement Agreement and all
               documents delivered pursuant thereto;

        (iv)   the execution and delivery by Allelix of the Arrangement
               Agreement and all agreements delivered pursuant thereto, the
               performance by Allelix of its obligations thereunder and the
               consummation of the transactions contemplated therein will not
               result in the breach of or violate any term or provision of the
               articles or by-laws of Allelix; and

        (v)    the Arrangement Agreement has been duly executed and delivered by
               Allelix and all agreements delivered pursuant to the terms
               thereof are valid and binding obligations of Allelix enforceable
               against it in accordance with their respective terms, subject to
               enforceability being limited by applicable bankruptcy,
               insolvency, reorganization and other laws affecting creditors'
               rights generally and the discretionary nature of certain remedies
               (including specific performance and injunctive relief) and
               subject to the effectiveness of clauses providing rights of
               indemnity or exculpating a party or persons from a

                                     E-35
<PAGE>

               liability or a duty otherwise owed which may be limited by law;

         and in giving such opinion, Allelix Counsel may rely, in respect of
         matters of fact, upon certificates of senior officers of Allelix or any
         other appropriate persons; and in respect of matters governed by the
         laws of any jurisdiction other than Ontario, Quebec, Alberta, British
         Columbia or the laws of Canada applicable therein, Allelix Counsel may
         deliver the opinion of local counsel in such other jurisdiction;

     (c) Allelix shall have complied, in all material respects, with its
         covenants in the Arrangement Agreement and Allelix shall have provided
         to NPS a certificate of the Chairman of the Board of Allelix and the
         Chief Executive Officer (or such other officer of Allelix that may be
         acceptable to NPS, acting reasonably) certifying that Allelix has
         complied with its covenants therein and NPS shall have no knowledge to
         the contrary;

     (d) the Interim Order, the Final Order and any required orders from the
         applicable securities regulatory authorities authorizing the issuance
         of the Exchangeable Shares shall have been obtained on terms
         satisfactory to NPS, acting reasonably;

     (e) between the date of the most recent public disclosure by Allelix, and
         the Effective Date, there shall not have occurred any Material Adverse
         Change with respect to Allelix; and

     (f) the directors of Allelix and its Subsidiaries shall have tendered their
         resignations to be effective on the Effective Date.

     The foregoing conditions precedent are for the benefit of NPS and may be
waived in whole or in part by NPS in writing at any time. If any of the above
conditions shall not be complied with or waived by NPS on or before the date
required for the performance thereof, NPS may, in addition to the other remedies
it may have at law or equity, rescind and terminate the Arrangement Agreement by
written notice to Allelix.

General Covenants

Mutual Covenants

     Each of Allelix and NPS has covenanted pursuant to the Arrangement
Agreement, among other things, that, until the Effective Date or the date upon
which the Arrangement Agreement is terminated, whichever is earlier, unless the
other party otherwise agrees, it will:

     (a) use all reasonable commercial efforts to satisfy the conditions
         precedent to its respective obligations set out in the Arrangement
         Agreement and to do all other things necessary, proper or advisable
         under Applicable Law to complete the Arrangement, including using all
         reasonable commercial efforts to obtain all necessary waivers,
         consents, approvals and authorizations required to be obtained from
         other parties under loan agreements, leases and other contracts or
         otherwise under Applicable Law and to effect all necessary
         registrations and filings and submissions of information requested by
         governmental authorities required to be effected by it in connection
         with the Arrangement;

     (b) make available and cause to be made available to the other party, its
         agents and advisors, all documents and agreements in any way relating
         to or affecting its business, financial condition, operations,
         prospects, properties, assets or affairs, except where it is
         contractually precluded from making such document or agreement
         available in which case it shall co-operate with the other party in
         securing access to any such documentation not in its possession or
         under its control;

     (c) not take any action, refrain from taking any action or permit any
         action to be taken or not taken, inconsistent with the Arrangement
         Agreement or which might, directly or indirectly, interfere with or
         adversely affect the consummation of the Arrangement; and

     (d) not, during the period commencing on the date of the Arrangement
         Agreement and ending on the earlier of the Effective Date of the
         Arrangement and the second anniversary of the termination of the
         Arrangement Agreement, directly or indirectly solicit, induce, recruit
         or encourage any of the other party's employees to terminate their
         employment with the other party or attempt to solicit, induce or
         recruit employees of the other party.

Covenants of Allelix

     Allelix has covenanted and agreed pursuant to the Arrangement Agreement
that, until the Effective Date or the date on which the Arrangement Agreement is
terminated, whichever is earlier, it will, among other things:

     (a) in a timely and expeditious manner and as soon as reasonably
         practicable, carry out the terms of the Interim Order; convene the
         Allelix Meeting; solicit proxies to be voted at the Allelix Meeting in
         favour of the Arrangement; provide notice to NPS of the

                                     E-36
<PAGE>

         Allelix Meeting and allow NPS' representatives to attend the Allelix
         Meeting; and conduct the Allelix Meeting in accordance with the Interim
         Order, the by-laws of Allelix and any instrument governing such
         meeting;

     (b) subject to the approval of the Arrangement at the Allelix Meeting in
         accordance with the provisions of the Interim Order, file, proceed with
         and prosecute an application for the Final Order;

     (c) subject to approval of the Continuance Resolution at the Allelix
         Meeting, file articles of continuance with the OBCA Director;

     (d) forthwith carry out the terms of the Final Order and, subject to the
         receipt of the Final Order, will file the Articles of Arrangement and
         the Final Order with the OBCA Director in order for the Arrangement to
         become effective on or before January 31, 2000;

     (e) except with the prior written consent of NPS, not to incur significant
         new capital expenditures above specified levels;

     (f) except with the prior written consent of NPS, not to incur any
         indebtedness for borrowed money; and

     (g) except with the prior written consent of NPS, not to enter into or
         agree to enter into any licence agreement, collaboration and/or
         development agreement or any other agreement to sell, convey, transfer,
         assign or encumber any of its right, title or interest in any of its
         research, pre-clinical or clinical development programs.

Covenants of NPS

     NPS has covenanted and agreed pursuant to the Arrangement Agreement that,
until the Effective Date or the date on which the Arrangement Agreement is
terminated, whichever is earlier, it will, among other things:

     (a) not issue NPS Common Shares at a price which is less than the then
         current market price on their date of issue, less 10 percent, except
         upon the exercise of NPS options;

     (b) allow Allelix and its counsel to participate fully in the preparation
         of the notice of meeting and management proxy circular of NPS prepared
         in connection with the NPS Meeting;

     (c) in a timely and expeditious manner and as soon as practicable but in
         any event not later than January 15, 2000, convene the NPS Meeting;

     (d) solicit proxies to be voted at the NPS Meeting in favour of the matters
         to be considered thereat;

     (e) provide notice to Allelix of the NPS Meeting and allow Allelix's
         representatives to attend the NPS Meeting;

     (f) to the extent within its power, forthwith carry out the terms of the
         Interim Order and the Final Order;

     (g) appoint on the Effective Date of the Arrangement (i) three Allelix
         directors to the board of NPS mutually acceptable to Allelix and NPS,
         acting reasonably; and (ii) the individuals holding the positions of
         Senior Vice President and Chief Financial Officer and Senior Vice
         President, Operations of Allelix as officers of NPS;

     (h) except with the prior written consent of Allelix, not acquire or agree
         to acquire (by acquisition of securities or assets or otherwise) any
         corporation, partnership or other business organization or division or
         any assets or properties for consideration of more than U.S.$4,000,000
         in total; and

     (i) except with the prior written consent of Allelix, cause it and its
         Subsidiaries to use all reasonable efforts to preserve intact their
         present business, licenses and permits and will not, nor will it permit
         its Subsidiaries to enter into any transaction out of the ordinary
         course of business if the total obligations and commitments of NPS and
         its Subsidiaries thereunder would exceed U.S.$4,000,000.

Covenants of Allelix Regarding Non-Solicitation

     Pursuant to the Arrangement Agreement, without the prior written consent of
NPS, from and after the date of the Arrangement Agreement, Allelix and its
Subsidiaries have covenanted that they will not, and will not authorize or
permit any of their Representatives to, directly or indirectly, solicit,
initiate or encourage (including by way of furnishing information) or take any
other action to facilitate any enquiries or the making of any proposal which
constitutes or may reasonably be expected to lead to an Acquisition Proposal
from any Person, or engage in any discussions or negotiations relating thereto
or accept any Acquisition Proposal.

                                     E-37
<PAGE>

     Notwithstanding the foregoing however, Allelix may at any time prior to the
time the Allelix Shareholders shall have voted to approve the Arrangement and
the other transactions contemplated thereby, engage in discussions or
negotiations with a third party who (without any solicitation, initiation, or
encouragement, directly or indirectly, by Allelix, any of its Subsidiaries or
Representatives after the date of the Arrangement Agreement) seeks to initiate
such discussions or negotiations and may furnish such third party information
concerning Allelix and its business, properties and assets if and only to the
extent that:

     (a) the third party has made a Superior Proposal and Allelix's board of
         directors has concluded in good faith, after considering the Applicable
         Law and receiving the advice of outside counsel to this effect in
         writing or recorded in the minutes, that such action is necessary for
         the board of directors to act in a manner consistent with its fiduciary
         duties under Applicable Law; and

     (b) prior to furnishing such information to or entering into discussions or
         negotiations with such person or entity, Allelix provides prompt notice
         to NPS to the effect that it is furnishing information to or entering
         into discussions or negotiations with such person or entity and
         receives from such person or entity an executed confidentiality and
         restricted use agreement in reasonably customary form.

     Pursuant to the Arrangement Agreement, Allelix is obligated to notify NPS
orally and in writing of any enquiries, offers or proposals with respect to an
Acquisition Proposal (including without limitation terms and conditions of any
such proposal, the identity of the person making it and all other information
reasonably requested by NPS) within 12 hours of the receipt thereof, shall
answer NPS' questions with respect to such enquiries, offers or proposals and
shall give NPS five days advance notice of any agreement to be entered into
with, or information to be supplied to, any person making such enquiry, offer or
proposal.

     Allelix has covenanted that it will not enter into any agreement regarding
a Superior Proposal (a "Proposed Agreement") without providing NPS with an
opportunity to amend the Arrangement Agreement to provide for a value per
Allelix Common Share at least equal to that included in the Proposed Agreement
(as determined in good faith by the board of directors of Allelix after
receiving the advice of its financial advisors to this effect in writing or
recorded in the minutes). In particular, Allelix has covenanted to provide NPS
with a copy of any Proposed Agreement as executed by the party making the
proposal at least 72 hours prior to its proposed execution by Allelix. In the
event that NPS decides to amend the Arrangement Agreement as provided above,
Allelix has covenanted that it will not enter into the Proposed Agreement.

Covenants of NPS Regarding No Shop

     Without the prior written consent of Allelix, from and after the date of
the Arrangement Agreement, NPS and its Subsidiaries will not, and will not
authorize or permit any of their Representatives to, directly or indirectly,
solicit, initiate or encourage or take any other action to facilitate any
enquiries or the making of a proposal which constitutes or may be reasonably
expected to lead to a NPS Acquisition Proposal (as defined below) from any
Person engaged in any discussions or negotiations relating thereto or accept any
Acquisition Proposal. "NPS Acquisition Proposal" is defined in the Arrangement
Agreement to be a written proposal or offer by any person to acquire not less
than 20 percent of the NPS Common Shares (other than NPS Common Shares issuable
on the exercise of outstanding options or warrants of NPS) by business
combination, sale of issued or treasury shares or tender or exchange offer or
similar transaction, including, without limitation, any single or multi-step
transaction or series of related transactions which is structured to permit a
Person to acquire such NPS Common Shares. However, NPS may engage in discussions
or negotiations at any time with a third party who seeks to initiate such
discussions and may furnish such third party with information concerning NPS if
the board of directors of NPS has concluded, in good faith, after considering
Applicable Law and receiving the advice of counsel, that such action is
necessary for the board to act in a manner consistent with its fiduciary duties.

Representations and Warranties

Mutual Representations and Warranties

     The Arrangement Agreement contains a number of mutual representations and
warranties of Allelix and NPS, relating to, among other things: (i) the
corporate existence, organization and qualification of each of Allelix and NPS;
(ii) authorization, execution, delivery and enforceability of the Arrangement
Agreement; (iii) the absence of any violations, conflicts, breaches, defaults,
rights, encumbrances, suspensions, revocations or lack of consents, approvals or
notices which would have a Material Adverse Effect on the party giving the
representation and warranty; (iv) the absence of any outstanding actions, suits,
proceedings or investigations, either commenced, contemplated or threatened
against either of Allelix or NPS, including their respective Subsidiaries, which
could reasonably be expected to have a Material Adverse Effect on the party
giving the representation and warranty; (v) the financial statements of the
party giving the representation and warranty; (vi) minute books and records;
(vii) the filing of tax returns and the payment of taxes; (viii) the maintenance
of insurance; (ix) environmental matters; (x) employment agreements and labour
matters; (xi) the obtaining by Allelix and NPS of various consents and approvals
except where the failure to obtain such consent or approval would not constitute
a Material Adverse Effect to the party giving the representation and warranty;
and (xii) intellectual property rights.

                                     E-38
<PAGE>

Representations and Warranties of Allelix

     The Arrangement Agreement contains a number of additional representations
and warranties of Allelix relating to, among other things: (i) the
capitalization of Allelix; (ii) the status of Allelix as a reporting issuer
under the securities laws of each province of Canada and the listing of all
issued and outstanding Allelix Common Shares on the TSE; (iii) the truth and
correctness of the material provided by Allelix for inclusion in the information
circular of NPS; and (iv) the 1999 audited financial statements of Allelix.
Allelix has also represented and warranted that the board of directors of
Allelix has: i) unanimously determined that the Arrangement is fair to the
Allelix Common Shareholders and that the Arrangement is in the best interests of
Allelix and the Allelix Common Shareholders; ii) approved the Arrangement and
the entering into and execution of the Arrangement Agreement; and iii) resolved
to recommend that the registered holders of the Allelix Common Shares vote in
favour of the Arrangement.

Representations and Warranties of NPS

     The Arrangement Agreement contains a number of additional representations
and warranties of NPS relating to, among other things, (i) the capitalization of
NPS; (ii) the status of NPS as a reporting company under the Exchange Act; and
(iii) the truth and correctness of the material provided by NPS for inclusion in
this Circular. NPS has also represented and warranted that the board of
directors of NPS has unanimously approved the Arrangement Agreement and has
determined to recommend that the registered holders of the NPS Common Shares
vote in favour of the matters contemplated by the Arrangement Agreement to be
voted on at the NPS Meeting.

Confidentiality

     Each of Allelix and NPS acknowledged and agreed pursuant to the Arrangement
Agreement that it will not use Confidential Information for any purpose
whatsoever other than for purposes specifically relating to evaluation of the
proposed transaction, and that any Confidential Information provided to a party
to the Arrangement Agreement (the "receiving party") in written form shall be
returned to the party supplying the same (the "supplier") forthwith upon the
Arrangement Agreement being terminated. Each of Allelix and NPS further agreed
pursuant to the Arrangement Agreement that no written materials, reproductions,
extracts, typed or hand written notes or memorandums made from, or relating in
any way to, the Confidential Information shall be retained by such parties after
the termination of the Arrangement Agreement and, upon any such occurrence, all
such materials, extracts, notes and memorandums shall be destroyed unless
returned to the supplier, and the receiving party shall, upon the request of the
supplier, provide a statutory declaration as to that fact, from an officer.

     Pursuant to the Arrangement Agreement, each of Allelix and NPS further
undertook and agreed with the supplier that such receiving party shall keep such
Confidential Information in strict confidence, and shall not disclose any such
Confidential Information to any third party or parties whatsoever except in
strict accordance with the Arrangement Agreement. Disclosure of the Confidential
Information may be made by or on behalf of the receiving party to its employees
and professional advisors who have a need to know such Confidential Information
for purposes of considering the making of a bona fide evaluation of the proposed
transaction, provided that all such persons agree to keep such information
confidential and to be bound by the Arrangement Agreement to the same extent as
if they were parties thereto. Disclosure of the Confidential Information may be
made by or on behalf of the receiving party, or any other party to whom
disclosure has been made in accordance therewith, if required by law, provided
however, that upon receipt of any such request or order for such disclosure, the
receiving party or such other party to whom the request for disclosure is made,
shall notify the supplier that a request has been made for disclosure in order
that the supplier may seek any appropriate protective order or waive compliance
by the receiving party with the provision of the Arrangement Agreement.

     The restrictions on the use and disclosure of the Confidential Information
set forth in the Arrangement Agreement shall not apply if:

     (a) the Confidential Information is or becomes publicly available other
         than through a breach of the Arrangement Agreement by either party to
         whom disclosure is made;

     (b) the Confidential Information is subsequently lawfully obtained without
         a secrecy obligation from a third party or parties not in a contractual
         or fiduciary relationship with any receiving party, other than through
         a breach of the Arrangement Agreement, provided that written supporting
         documentation confirming the lawful authority of such third party or
         parties to disclose the Confidential Information is provided to the
         supplier;

     (c) the Confidential Information was known by the receiving party or other
         parties prior to the time at which disclosure of such Confidential
         Information was made to the receiving party or such other parties in
         accordance with the Arrangement Agreement, provided that written
         supporting documentation confirming that fact is provided to the
         supplier; or

     (d) the written consent of the supplier is given prior to any such use or
         disclosure being made.

                                     E-39
<PAGE>

     Each of Allelix and NPS agreed pursuant to the Arrangement Agreement that
it would be difficult to measure the damage to the other party resulting from
the breach of such party's obligations under such confidentiality provisions,
that injury to the other party from any such breach would be impossible to
calculate, and that monetary damages would therefore be an inadequate remedy;
accordingly, each party agreed that the other party shall be entitled, in
addition to all other remedies it might have, to injunctions or other
appropriate orders to restrain any such breach without showing or providing any
actual damage or posting any bond or other security in connection with such
remedy.

Standstill

     Each of Allelix and NPS has agreed pursuant to the Arrangement Agreement
that neither it nor an Affiliate will, prior to June 27, 2000, without the prior
written consent of the other party, among other things:

     (a) acquire, offer or agree to acquire, directly or indirectly, by purchase
         or otherwise, individually or in concert with any other person, any
         voting securities or securities convertible into or exchangeable for
         voting securities, of the other party;

     (b) directly or indirectly make, or in any way participate in, any
         solicitation of proxies to vote, or seek to advise or influence any
         other person with respect to the voting of any voting securities of the
         other party; or

     (c) act alone or in concert with others to seek to control the management,
         directors or corporate policies of the other party.

     The above restrictions will not apply in the event an offer is made (and
not withdrawn at the time the conduct described above has commenced) to acquire
beneficial ownership of all or a material portion of the assets of the other
party or one or more of its Subsidiaries or not less than 20 percent of the
issued and outstanding common shares of the other party pursuant to a
transaction to be considered at a meeting of security holders requisitioned by a
security holder of such other party or pursuant to a take-over bid, tender offer
or similar transaction involving the other party.

Access

     Allelix has covenanted pursuant to the Arrangement Agreement that NPS will
be entitled, on reasonable notice to Allelix, to access Allelix's premises and
will be entitled to meet with Allelix's shareholders, creditors, licensors,
licensees and employees. Allelix and its Subsidiaries must keep NPS fully
informed as to its and its Subsidiaries' business and affairs and as to the
decisions required with respect to the most advantageous methods of operating
and producing from its and its Subsidiaries' assets.

Amendment

  The Arrangement Agreement may, at any time and from time to time before or
after the holding of the Allelix Meeting, be amended by written agreement of the
parties thereto without further notice to or authorization on the part of their
respective shareholders, and any such amendment may, without limitation:

     (a) change the time for performance of any of the obligations or acts of
         the parties thereto;

     (b) waive any inaccuracies or modify any representation contained therein
         or in any document delivered pursuant hereto;

     (c) waive compliance with or modify any of the covenants therein contained
         and waive or modify performance of any of the obligations of the
         parties thereto; and

     (d) waive compliance with or modify any conditions precedent therein
         contained;

provided that, notwithstanding the foregoing, the number of Exchangeable Shares
which the Allelix Common Shareholders shall have the right to receive on the
Arrangement may not be reduced without the approval of the registered holders of
the Allelix Common Shares given in the same manner as required for the approval
of the Arrangement or as may be ordered by the Court.

Support Agreement

     Pursuant to the Support Agreement, a copy of which is attached to this
Circular as Appendix E, NPS will make the following covenants for so long as any
Exchangeable Shares (other than Exchangeable Shares owned by NPS or its
Affiliates) remain outstanding:

     (a) NPS will not declare or pay dividends on the NPS Common Shares unless
         NPS Allelix is able to declare and pay and simultaneously declares or
         pays, as the case may be, an equivalent dividend on the Exchangeable
         Shares;

                                     E-40
<PAGE>

     (b) NPS will advise NPS Allelix in advance of the declaration of any
         dividend on the NPS Common Shares and ensure that the declaration date,
         record date and payment date for dividends on the Exchangeable Shares
         are the same as that for the corresponding dividend on the NPS Common
         Shares;

     (c) NPS will ensure that the record date for any dividend declared on the
         NPS Common Shares is not less than ten business days after the
         declaration date of such dividend;

     (d) NPS will take all actions and do all things reasonably necessary or
         desirable to enable and permit NPS Allelix, in accordance with
         Applicable Law, to pay to the registered holders of Exchangeable Shares
         the NPS Allelix Liquidation Amount, the Retraction Price or the
         Redemption Price in the event of a liquidation, dissolution or winding-
         up of NPS Allelix, a Retraction Request by a holder of Exchangeable
         Shares or a redemption of Exchangeable Shares by NPS Allelix; and

     (e) NPS will take all actions and do all things reasonably necessary or
         desirable to enable and permit NPS Holdings, in accordance with
         Applicable Law, to perform its obligations arising upon the exercise by
         it of the Liquidation Call Right, the Retraction Call Right or the
         Redemption Call Right, including without limitation all such actions
         and all such things as are necessary or desirable to enable and permit
         NPS Holdings to cause to be delivered NPS Common Shares to the
         registered holders of Exchangeable Shares in accordance with the
         provisions of the Liquidation Call Right, the Retraction Call Right or
         the Redemption Call Right, as the case may be.

     The Support Agreement and the Exchangeable Share Provisions provide that,
without the prior approval of NPS Allelix and the registered holders of
Exchangeable Shares as set forth above under "The Arrangement -- Transaction
Mechanics and Description of Exchangeable Shares -- Amendment and Approval", NPS
will not issue or distribute additional NPS Common Shares, securities
exchangeable for or convertible into or carrying rights to acquire NPS Common
Shares or rights to subscribe therefor or other assets to all or substantially
all registered holders of NPS Common Shares, nor change the NPS Common Shares,
unless the same or an economically equivalent distribution on, or change to, the
Exchangeable Shares (or in the rights of the registered holders thereof) is made
simultaneously. The board of directors of NPS Allelix is exclusively empowered
to determine in good faith and in its sole discretion whether any corresponding
distribution on or change to the Exchangeable Shares is the same as or
economically equivalent to any proposed distribution on or change to the NPS
Common Shares. In the event of any proposed tender offer, share exchange offer,
issuer bid, take-over bid or similar transaction with respect to the NPS Common
Shares which is recommended, approved or consented to by the board of directors
of NPS and in connection with which the Exchangeable Shares are not redeemed by
NPS Allelix or purchased by NPS Holdings pursuant to the Redemption Call Right,
NPS will use reasonable efforts to take all actions necessary or desirable to
enable registered holders of Exchangeable Shares to participate in such
transaction to the same extent and on an economically equivalent basis as the
registered holders of NPS Common Shares.

     NPS Allelix is required to notify NPS and NPS Holdings of the occurrence of
certain events, such as the liquidation, dissolution or winding-up of NPS
Allelix, and NPS Allelix's receipt of a Retraction Request from a holder of
Exchangeable Shares.

     Under the Support Agreement, NPS has agreed not to exercise any voting
rights attached to the Exchangeable Shares owned by it or any of its Affiliates
on any matter considered at meetings of registered holders of Exchangeable
Shares. NPS has also agreed to use its reasonable efforts to enable NPS Allelix
to maintain a listing for the Exchangeable Shares on a Canadian stock exchange.

     With the exception of administrative changes for the purpose of adding
covenants for the protection of the registered holders of Exchangeable Shares,
making certain necessary amendments or curing ambiguities or clerical errors (in
each case provided that the board of directors of each of NPS, NPS Allelix and
NPS Holdings are of the opinion that such amendments are not prejudicial to the
rights or interests of the registered holders of Exchangeable Shares), the
Support Agreement may not be amended without the approval of the registered
holders of Exchangeable Shares as set forth above under "The Arrangement --
Transaction Mechanics and Description of Exchangeable Shares -- Amendment and
Approval".

                           INVESTMENT CONSIDERATIONS

     The following investment considerations should be considered by Allelix
Shareholders in evaluating whether to approve the Arrangement. These investment
considerations should be considered in conjunction with the other information
included in this Circular.

U.S. Federal Income Tax Consequences to Allelix Common Shareholders

U.S. Holders

     The exchange by a U.S. Holder of Allelix Common Shares for NPS Common
Shares will be a taxable event for United States federal income tax purposes.

                                     E-41
<PAGE>

Non-U.S. Holders

  No statutory, judicial or administrative authority exists that directly
addresses certain of the United States federal income tax consequences of the
issuance and ownership of instruments and rights comparable to the Exchangeable
Shares, the Ancillary Rights and the Call Rights. Consequently, the United
States federal income tax consequences of the issuance and ownership of the
Exchangeable Shares are uncertain.

  NPS and NPS Allelix have advised Allelix that, based on the fact that the
Exchangeable Shares will be issued by NPS Allelix, a Canadian corporation, and
dividends on the Exchangeable Shares will be paid from the cash flow and
earnings generated by NPS Allelix and its Subsidiaries, they intend to treat
dividends received by non-U.S. Holders of Exchangeable Shares as dividends
distributed by NPS Allelix not subject to United States withholding tax. If,
contrary to this position, dividends on the Exchangeable Shares were determined
to constitute income from United States sources, non-U.S. Holders of
Exchangeable Shares would likely be subject to United States withholding tax.
See "Income Tax Considerations for Allelix Common Shareholders -- United States
Federal Income Tax Considerations".

Canadian Federal Income Tax Consequences to Allelix Common Shareholders

  The Transaction has been structured to provide the opportunity for a tax
deferral for Canadian income tax purposes for certain Canadian Residents who
receive Exchangeable Shares in exchange for Allelix Common Shares pursuant to
the Arrangement. However, such Canadian Residents will generally only be able to
obtain such Canadian tax deferral for as long as they hold the Exchangeable
Shares, and will generally recognize a taxable dividend and/or a gain or loss
upon the exchange (including on the redemption or retraction) of their
Exchangeable Shares for NPS Common Shares or upon the purchase for cancellation
of the Exchangeable Shares by NPS Allelix. Redemption of the Exchangeable Shares
for NPS Common Shares may occur at any time after the Effective Date if a
Redemption Date occurs. A Redemption Date will occur no earlier than December
31, 2004 except in the following circumstances: (i) the occurrence of a NPS
Control Transaction; or (ii) there being fewer than 1,000,000 Exchangeable
Shares outstanding (other than Exchangeable Shares held by NPS and its
Affiliates). See "Income Tax Considerations for Allelix Common Shareholders --
Canadian Federal Income Tax Considerations" and "The Arrangement -- Transaction
Mechanics and Description of Exchangeable Shares -- Retraction, Redemption and
Call Rights; Purchase for Cancellation". As a result of the existence of the
Call Rights, the Exchange Right and the Automatic Exchange Right, a holder of
Exchangeable Shares cannot control whether such holder will receive NPS Common
Shares by way of redemption (or retraction) of the Exchangeable Shares by NPS
Allelix or by way of purchase of the Exchangeable Shares by NPS or NPS Holdings.
The Canadian federal income tax consequences of a redemption (or retraction)
differ from those of a purchase.

  Provided the Exchangeable Shares are listed on a prescribed stock exchange in
Canada (which currently includes the TSE), the Exchangeable Shares will not be
foreign property under the ITA for trusts governed by "registered retirement
savings plans" ("RRSPs"), "registered retirement income funds" ("RRIFs") and
"deferred profit sharing plans" ("DPSPs") (as each of those terms are defined in
the ITA), for registered pension plans or for certain other persons to whom Part
XI of the ITA applies. The Ancillary Rights and NPS Common Shares will be
foreign property under the ITA.

Market for Exchangeable Shares

  Although the economic value of the Exchangeable Shares is expected to be
closely linked to the trading value of NPS Common Shares because the voting and
economic rights of a holder of the Exchangeable Shares are substantially
equivalent in all material respects to the voting and economic rights of a
holder of NPS Common Shares and because of the right of a holder of Exchangeable
Shares at any time to exchange Exchangeable Shares for NPS Common Shares, there
can be no assurance that an active trading market in the Exchangeable Shares
will develop or be sustained or that the Exchangeable Shares will continue to
meet the listing requirements of the TSE. NPS has advised Allelix that,
currently, it does not intend to list the Exchangeable Shares on any other stock
exchange.

Risk Related to the Arrangement

Uncertainty Relating to Integration

  The Arrangement involves the integration of two companies that have previously
operated independently. Such integration will require significant effort from
each company including the coordination of their efforts in research and
development, business development, intellectual property, finance and
administrative efforts. There can be no assurance that NPS will integrate the
respective operations of NPS and Allelix without encountering difficulties or
experiencing loss of personnel, or that the benefits expected from such
integration will be realized. The diversion of the attention of management and
any difficulties encountered in the transition process (including the
interruption of, or a loss of momentum in, Allelix's or NPS' activities and
problems associated with employee uncertainty and the potential loss of key
personnel) could have an adverse impact on NPS' ability to realize anticipated
benefits from the Arrangement.

                                     E-42
<PAGE>

Risks Associated with Fixed Exchange Ratio

  As a result of the Arrangement, each outstanding Allelix Common Share will be
converted into the right to receive 0.3238 NPS Common Shares. Because the
Exchange Ratio is fixed and will not increase or decrease due to fluctuations in
the market price of either NPS or Allelix Common Shares, the specific value of
the consideration to be received by Allelix Common Shareholders pursuant to the
Arrangement will depend on the market price of NPS Common Shares at the
Effective Time. In the event that the market price of NPS Common Shares
decreases or increases prior to the Effective Time, the market value at the
Effective Time of NPS Common Shares to be received by Allelix Common
Shareholders pursuant to the Arrangement would correspondingly decrease or
increase. The market prices of NPS Common Shares and Allelix Common Shares as of
a recent date are set forth in this Circular under the heading "Market Price".
NPS Common Shares and Allelix Common Shares historically have been subject to
price volatility. No assurance can be given as to the market prices of NPS
Common Shares or Allelix Common Shares at any time.

Effect of the Arrangement on Corporate Partners and Existing Agreements

  Certain of Allelix's and NPS' existing corporate partners may view the
Arrangement as disadvantageous to them. As a consequence, the combined company's
relationship with these strategic partners could be adversely affected. In
addition, the Arrangement will provide certain corporate partners with the right
to terminate their research and development agreements with Allelix under
certain circumstances. There can be no assurance that these agreements will not
be terminated. The termination under such agreements could have a Material
Adverse Effect on Allelix's business and operations. There can be no assurance
that such consents will be given and, if not given, that such contracts will not
terminate.

The market price of NPS Common Stock may decline as a result of the Arrangement

  Since public announcement of the Arrangement, the price for NPS Common Shares
has declined 42.0%. The market price of NPS Common Shares may continue to
decline if, among other things:

  .   securities analysts fail to write reports which describe the Arrangement
      favorably and/or if securities analysts write about the Arrangement, but
      fail to recommend the stock;

  .   the integration of NPS' and Allelix's operations is not successful;

  .   the combined company does not experience business synergies as quickly or
      to the extent as may be expected by financial analysts;

  .   the accretive/dilutive effect of the Arrangement is not in line with the
      expectations of financial analysts; or

  .   NPS determines that it will do an additional equity financing on terms or
      at a time which the marketplace concludes is unattractive or dilutive.

  In any such case, the trading price of NPS Common Shares may decline and an
Allelix Shareholder may lose all or part of his, her or its investment.

The Arrangement will result in costs of integration and transaction expenses
that could adversely affect combined financial results

  If the benefits of the Arrangement do not exceed the costs associated with it,
including the dilution to the NPS' shareholders resulting from the issuance of
shares of NPS Common Shares in connection with the Arrangement, NPS' financial
results, including earnings per share, could be adversely affected. The combined
company also expects to incur costs after completion of the Arrangement
associated with integrating the operations of NPS and Allelix. Such costs may
include: (i) elimination of duplicate operations; and (ii) consolidation of
certain administration, support and research and development activities.

  Actual costs may substantially exceed preliminary estimates. In addition,
unanticipated expenses associated with integrating the two companies may arise.
NPS expects to incur a charge currently estimated to be U.S.$19,460,000 in the
fourth quarter of 1999 to reflect NPS's write-off of Allelix's in-process
research and development efforts. These costs will not be accompanied by outward
cash flow, but may be seen by investors as increasing the net loss of NPS. NPS
may also incur additional charges in subsequent quarters to reflect costs
associated with the Arrangement.

If the combined company is not permitted to write-off a significant amount of
purchase price as attributable to in-process research and development, estimates
of future period results and actual future period results could be burdened with
additional costs and the price of NPS Common Shares could decline

  If current accounting rules as interpreted by NPS' auditors and the SEC do not
permit the combined company to write off

                                     E-43
<PAGE>

immediately a significant amount of the purchase price of the Arrangement as
attributable to in-process research and development, the combined company would
have to amortize a correspondingly higher amount of the purchase price over
several years. Such amortization would be reflected as an expense item on the
combined company's statement of operations, and cause it to report higher
losses, which may adversely affect its stock price.

Effect of Arrangement on burn rate and the attendant requirement to reduce
costs, delay expenditures (for example in clinical development) or raise
additional equity financing

  NPS has announced its intention to devote considerable cash resources to late-
stage clinical development, including for example, a Phase III trial for ALX 1-
11 for osteoporosis. If NPS' cost estimates are exceeded or incurred earlier
than planned, NPS may be required further to reduce costs (for example, by
reducing head count), to delay developments or to seek additional financing.
Failure to manage the mix of this cash expenditure and clinical process may
cause the price of NPS Common Shares to decline.

Risk Factors Related to the Business of NPS

  For a discussion of risk factors relating to the business of NPS, see Appendix
S to this Circular.

                                     E-44
<PAGE>

                                 MARKET PRICE

  NPS Common Shares are quoted on the NASDAQ Stock Market. Allelix Common Shares
are listed on the TSE and the ME.

  The following table sets forth, for the calendar periods indicated, the high
and low closing sale prices for NPS Common Shares as reported on the NASDAQ
Stock Market:

                               NPS Common Shares

<TABLE>
<CAPTION>
                                                        NASDAQ
                                                 ------------------------
                    Calendar Period                 High           Low
     ------------------------------------------  ---------      ---------
     <S>                                         <C>            <C>
     1997
     First Quarter                               US$12.250      US$ 9.500
     Second Quarter............................     11.000          8.250
     Third Quarter.............................     10.750          8.125
     Fourth Quarter............................     10.063         7.5000
     1998
     First Quarter.............................  US$ 8.500      US$ 7.375
     Second Quarter............................      8.250          6.750
     Third Quarter.............................      9.313          6.375
     Fourth Quarter............................      7.938          5.500
     1999
     First Quarter.............................  US$ 7.500      US$ 6.563
     Second Quarter............................      8.625          5.875
     Third Quarter.............................      8.000          5.500
     Fourth Quarter (to November 8, 1999)......      6.000          4.000
</TABLE>

  The following table sets forth, for the calendar periods indicated, the high
and low sale prices for the Allelix Common Shares as reported on the TSE and the
ME:

                             Allelix Common Shares

<TABLE>
<CAPTION>
                                                 TSE                ME
                                           ---------------   ---------------
   Calendar Period                          High      Low     High      Low
   --------------------------------------- ------   ------   ------   ------
   <S>                                     <C>      <C>      <C>      <C>
   1997
   First Quarter.........................  $18.50   $11.05   $18.50   $11.50
   Second Quarter........................   12.40     9.00    12.10     9.80
   Third Quarter.........................   16.00     9.75    15.50    10.20
   Fourth Quarter........................   15.25    10.35    14.50    10.35
   1998
   First Quarter.........................  $12.50   $ 8.00   $12.00   $ 8.10
   Second Quarter........................    9.75     8.00     9.70     8.15
   Third Quarter.........................    8.20     3.10     8.40     3.15
   Fourth Quarter........................    6.35     2.50     5.95     3.03
   1999
   First Quarter.........................  $ 4.95   $ 3.01   $ 4.70   $ 3.05
   Second Quarter........................    3.50     2.26     3.40     2.26
   Third Quarter.........................    3.75     2.00     3.60     2.01
   Fourth Quarter (to November 8, 1999)..    2.60     1.80     2.60     1.95
</TABLE>

  On September 27, 1999, the last full trading day prior to the public
announcement of the Arrangement Agreement, the closing sale price per NPS Common
Share, as reported on the NASDAQ Stock Market was U.S.$7.00 and the closing sale
price per Allelix Common Share as reported on the TSE and the ME was $3.65 and
$3.50, respectively. On November 8, 1999, the closing sale price per NPS Common
Share as reported on the NASDAQ Stock Market was U.S.$4.06, and the closing sale
price per Allelix Common Share as reported on the TSE and the ME was $1.86 and
$1.95, respectively. Since the market price of NPS Common Shares and the U.S.$
to $ exchange rate are subject to fluctuation due to numerous market forces, the
market value in Canadian dollars of the NPS Common Shares that Allelix Common
Shareholders may receive pursuant to the Transaction may increase or decrease
prior to the Effective Time. Allelix Shareholders are urged to obtain current
market quotations for NPS Common Shares and Allelix Common Shares. Historical
market prices and dividends are not indicative of future market prices and
dividends.

  On November 8, 1999, there were 20,126,232 Allelix Common Shares outstanding
held of record by 309 registered holders, 1,000 Allelix Preferred Shares held of
record by one holder, Allelix Options outstanding to acquire an aggregate of
1,649,532 Allelix Common Shares held of record by 129 registered holders and
Allelix Warrants outstanding to acquire an aggregate of 829,108 Allelix Common
Shares.

                                     E-45
<PAGE>

            SELECTED CONSOLIDATED FINANCIAL INFORMATION OF ALLELIX

  The following selected financial data presented for, and as of the end of,
each of the years in the five-year period ended August 31, 1999 are derived from
the consolidated financial statements of Allelix, which consolidated financial
statements have been audited by Ernst & Young LLP, Chartered Accountants. The
consolidated financial statements of Allelix as of August 31, 1999 and 1998 and
for the year then ended are included in this Circular and reference should be
made to these financial statements, including the notes thereto.

<TABLE>
<CAPTION>
                                                         1999         1998       1997       1996       1995
                                                    --------------  ---------  ---------  ---------  ---------
                                                            (in thousands, except per share amounts)
     <S>                                            <C>             <C>        <C>        <C>        <C>
     FINANCIAL POSITION
     Total assets.................................. $    50,539     $ 77,628   $ 95,764    $47,601   $ 30,483
     Long-term debt (net of current portion).......       2,296           --         --         --         --
     Shareholders' equity..........................      39,527       68,472     83,158     41,921     26,497
     RESULTS OF OPERATIONS
     Revenue.......................................      13,684       27,720     15,083     17,901      7,866
     Net loss......................................     (38,595)     (21,764)   (15,953)    (6,779)   (12,759)
     Per common share
       Net loss
          Basic....................................       (2.02)       (1.21)     (1.11)     (0.57)     (1.20)
</TABLE>

                                     E-46
<PAGE>

                     SELECTED FINANCIAL INFORMATION OF NPS

  The selected financial data presented below are for each fiscal year in the
five-year period ended December 31, 1998. These data have been derived from NPS
financial statements, which have been audited by KPMG LLP, independent certified
public accountants, and are qualified by reference to the Financial Statements
and Notes thereto. NPS is considered a development stage company as described in
Note 1 of Notes to Financial Statements.

<TABLE>
<CAPTION>
                                                                                       Year Ended December 31,
                                                                    -----------------------------------------------------------
                                                                       1998         1997        1996        1995        1994
                                                                    ----------   ----------   ---------   ---------   ---------
                                                                               (U.S.$ thousands, except per share data)
     <S>                                                            <C>          <C>          <C>         <C>         <C>
     Statement of Operations Data:
     Revenue from research and license agreements................   $    3,568   $    5,842   $  20,342   $   9,562   $   3,861
     Operating expenses:
     Research and development....................................       17,856       15,090      11,326       8,727       7,765
     General and administrative..................................        5,546        5,587       5,111       3,975       3,122
                                                                    ----------   ----------   ---------   ---------   ---------
     Total operating expenses....................................       23,402       20,677      16,437      12,702      10,887
     Operating income (loss).....................................      (19,834)     (14,835)      3,905      (3,140)     (7,026)
     Other income, net...........................................        2,672        3,308       2,550         322         270
                                                                    ----------   ----------   ---------   ---------   ---------
     Income (loss) before income tax expense.....................      (17,162)     (11,527)      6,455      (2,818)     (6,756)
     Income tax expense..........................................           --          167         350         500          --
                                                                    ----------   ----------   ---------   ---------   ---------
     Net income (loss)...........................................   $  (17,162)  $  (11,694)  $   6,105   $  (3,318)  $  (6,756)
                                                                    ----------   ----------   ---------   ---------   ---------
     Diluted net income (loss) per share(1)......................   $    (1.39)  $    (0.98)  $    0.55   $   (0.48)  $   (1.13)
     Diluted weighted average shares
       outstanding(1)............................................       12,337       11,956      11,086       6,924       5,977
</TABLE>

<TABLE>
<CAPTION>
                                                                                             December 31
                                                                    -----------------------------------------------------------
                                                                       1998         1997        1996        1995        1994
                                                                    ----------   ----------   ---------   ---------   ---------
                                                                                            (U.S.$ thousands)
     <S>                                                            <C>          <C>          <C>          <C>         <C>
     Balance Sheet Data:
     Cash, cash equivalents, and marketable
       securities.................................................  $   43,444   $   57,942   $  68,962   $   8,340   $   9,323
     Working capital..............................................      40,767       56,365      67,413       5,832       8,104
     Total assets.................................................      48,111       62,634      72,160      10,600      12,084
     Long-term portion of capital leases and
       long-term debt.............................................  $       32   $       65   $     327   $     747   $     440
     Deficit accumulated during development stage.................     (43,269)     (26,107)    (14,413)    (20,517)    (17,199)
     Stockholders' equity.........................................      45,146       62,634      69,870       7,322      10,165
</TABLE>

(1) See Note 1 of Notes to Financial Statements for information concerning the
    computation of net income (loss) per share.

                                     E-47
<PAGE>

         ALLELIX'S AND NPS' UNAUDITED PRO FORMA CONDENSED CONSOLIDATED
                             FINANCIAL STATEMENTS

  The Unaudited Pro Forma Condensed Consolidated Balance Sheet and Statement of
Operations (collectively, the "Unaudited Pro Forma Statements"), a copy of which
is attached to this Circular as Appendix R, give effect to the Arrangement to be
accounted for using the purchase method of accounting, whereby the total cost of
the Arrangement will be allocated to the tangible and intangible assets acquired
and liabilities assumed based upon their respective fair values. The Unaudited
Pro Forma Statements have been prepared on the basis of assumptions described in
the notes thereto, including assumptions related to the allocation of the total
purchase cost to the assets and liabilities of Allelix based upon preliminary
estimates of fair value. The actual allocation may differ from those assumptions
after valuations and other procedures are completed after the closing of the
Arrangement.

  The Unaudited Pro Forma Condensed Consolidated Statements of Operations were
prepared as if the Arrangement occurred as of January 1, 1998. The Unaudited Pro
Forma Condensed Consolidated Balance Sheet was prepared as if the Arrangement
occurred as of September 30, 1999. These statements are not necessarily
indicative of what the actual operating results or financial position would have
been had the Arrangement occurred on the dates and for the periods indicated and
do not purport to indicate future results of operations. In addition, they do
not reflect any cost saving or other synergies resulting from the Arrangement.

  The Unaudited Pro Forma Statements should be read in conjunction with the
historical consolidated financial statements and related notes of NPS and
Allelix included elsewhere in this Circular.

           INCOME TAX CONSIDERATIONS FOR ALLELIX COMMON SHAREHOLDERS

Canadian Federal Income Tax Considerations

  The following is a summary, prepared by Ernst & Young LLP, of the principal
Canadian federal income tax considerations under the ITA of receiving NPS Common
Shares or Exchangeable Shares pursuant to the Arrangement generally applicable
to Allelix Common Shareholders who, for purposes of the ITA and at all relevant
times, hold their Allelix Common Shares and will hold their Exchangeable Shares
and/or NPS Common Shares as capital property and deal at arm's length and are
not and will not be affiliated with Allelix, NPS, NPS Holdings or NPS Allelix.
This summary does not apply to Allelix Common Shareholders with respect to whom
NPS is or will be a foreign affiliate within the meaning of the ITA. In
addition, this summary does not discuss the Canadian federal income tax
considerations applicable to registered holders of Allelix Options or Allelix
Warrants.

  Allelix Common Shares, Exchangeable Shares and NPS Common Shares will
generally be considered to be capital property to Allelix Common Shareholders
unless held in the course of carrying on a business, in an adventure in the
nature of trade or as "mark-to-market property" for purposes of the ITA. Allelix
Common Shareholders who are Canadian Residents and whose Allelix Common Shares
and/or Exchangeable Shares might not otherwise qualify as capital property may,
in certain circumstances, be entitled to obtain such qualification by making an
irrevocable election permitted by subsection 39(4) of the ITA. Allelix Common
Shareholders who do not hold their Allelix Common Shares or who will not hold
their Exchangeable Shares and/or NPS Common Shares as capital property should
consult their own tax advisers regarding their particular circumstances as this
summary does not apply to such holders. This summary does not take into account
the potential application of the "mark-to-market" rules to certain "financial
institutions" (as defined in the ITA).

  This summary is based on the ITA, the regulations thereunder and Ernst & Young
LLP's understanding of published administrative practices and policies of
Revenue Canada, all in effect as of the date of this Circular. This summary
takes into account all Proposed Amendments to the ITA, although no assurances
can be given that the Proposed Amendments will be enacted in the form proposed,
or at all. This summary does not take into account or anticipate any other
changes in law, whether by judicial, governmental or legislative action or
decision, nor does it take into account provincial, territorial or foreign
income tax legislation or considerations, which may differ from the Canadian
federal income tax considerations described herein. No advance income tax ruling
has been sought or obtained from Revenue Canada to confirm the tax consequences
of any of the transactions described herein.

  THIS SUMMARY IS OF A GENERAL NATURE ONLY AND IS NOT INTENDED TO BE, AND SHOULD
NOT BE CONSTRUED TO BE, LEGAL, BUSINESS OR TAX ADVICE TO ANY PARTICULAR ALLELIX
COMMON SHAREHOLDER. ALLELIX COMMON SHAREHOLDERS SHOULD CONSULT THEIR OWN TAX
ADVISERS AS TO THE TAX CONSEQUENCES OF THE DESCRIBED TRANSACTIONS IN THEIR
PARTICULAR CIRCUMSTANCES.

  For the purposes of the ITA, all amounts relating to the acquisition, holding
or disposition of NPS Common Shares (including dividends, adjusted cost base and
proceeds of disposition) must be expressed in Canadian dollars; amounts
denominated in United States dollars must be converted into Canadian dollars
based on the prevailing United States dollar exchange rate generally, at the
time such amounts arise. In computing an Allelix Common Shareholder's liability
for tax under the ITA, any cash amounts received by such holder in United States
dollars must be converted into the Canadian Dollar Equivalent, and the amount of
any non-cash

                                     E-48
<PAGE>

consideration received by such holder must be expressed in Canadian dollars at
the time such consideration is received.

Allelix Common Shareholders Resident in Canada

   The following portion of the summary is applicable to an Allelix Common
Shareholder who is or is deemed to be a Canadian Resident at all relevant times.

Exchange of Allelix Common Shares for Exchangeable Shares and Ancillary Rights

   Non-Rollover Transaction.  An Allelix Common Shareholder who exchanges
Allelix Common Shares for Exchangeable Shares and Ancillary Rights will, unless
such holder makes a joint election under subsection 85(1) or 85(2) of the ITA as
discussed below, be considered to have disposed of the Allelix Common Shares
exchanged for proceeds of disposition equal to the sum of the fair market value
of Exchangeable Shares acquired by such holder on the exchange, and the fair
market value of Ancillary Rights acquired by such holder on the exchange, and,
as a result, such holder will, in general, realize a capital gain (or capital
loss) to the extent that such proceeds of disposition, net of any reasonable
costs of disposition, exceed (or are less than) the adjusted cost base to such
holder of the Allelix Common Shares immediately before the exchange. See "--
Taxation of Capital Gain or Capital Loss" below. Unless such an election is
made, the cost to the Allelix Common Shareholder of Exchangeable Shares acquired
on the exchange of Allelix Common Shares will be equal to the fair market value
of the Exchangeable Shares at the time of the exchange and the cost to the
Allelix Common Shareholder of Ancillary Rights acquired on the exchange of
Allelix Common Shares will be equal to the fair market value of such rights at
the time of the exchange. For these purposes, the Allelix Common Shareholder
will be required to determine the fair market value of Ancillary Rights received
on the exchange on a reasonable basis. Allelix is of the view, and has advised
Ernst & Young LLP, that such rights will have only nominal value. Such
determination of value is not binding on Revenue Canada, and Ernst & Young LLP
is not expressing a view on matters of factual determination such as this. The
cost of Exchangeable Shares and the cost of Ancillary Rights received by the
Allelix Common Shareholder on the exchange of Allelix Common Shares must be
averaged with the adjusted cost base to the Allelix Common Shareholder of other
Exchangeable Shares held as capital property and the adjusted cost base to the
Allelix Common Shareholder of other Ancillary Rights, respectively, acquired by
such holder other than on the exchange of Allelix Common Shares.

   Rollover Transaction.  An Eligible Holder who exchanges Allelix Common Shares
for Exchangeable Shares and Ancillary Rights may make a joint election with NPS
Allelix pursuant to subsection 85(1) of the ITA (or, in the case of an Eligible
Holder that is a partnership, pursuant to subsection 85(2) of the ITA ) and
thereby obtain a full or partial tax deferred "rollover" for Canadian income tax
purposes, depending on the Elected Amount(s) and the adjusted cost base to the
Eligible Holder of such holder's Allelix Common Shares at the time of the
exchange. So long as, at the time of the exchange, the adjusted cost base to the
Eligible Holder of such holder's Allelix Common Shares equals or exceeds the sum
of the fair market value of Ancillary Rights acquired by the Eligible Holder on
the exchange, the Eligible Holder may elect so as to not realize a capital gain
for the purposes of the ITA on the exchange. Allelix Common Shareholders should
consult their own tax advisers regarding this "rollover" treatment and as to
corresponding provincial "rollover" rules applicable for provincial income tax
purposes.

   In order to make an election under section 85 of the ITA, an Eligible Holder
must provide to the Depositary two signed copies of the necessary prescribed
election form within 90 days following the Effective Date, duly completed with
the details of the number of Allelix Common Shares transferred and the
applicable Elected Amount(s) for the purposes of the election. In accordance
with the Plan of Arrangement, subject to the election form being in apparent
compliance with the provisions of the ITA (and applicable provincial income tax
law) the form, signed by NPS Allelix will be returned to the Eligible Holders
for filing by the Eligible Holder with Revenue Canada.

   The relevant tax election form is Revenue Canada form T2057 (or, in the event
that the Allelix Common Shares are held as partnership property, Revenue Canada
form T2058). An Eligible Holder interested in making an election under section
85 should so indicate on the Letter of Transmittal and Election Form
accompanying this Circular in the space provided therein and a tax election
package will be sent to the Eligible Holder.

   In general, where a joint election under section 85 of the ITA is made by NPS
Allelix and an Eligible Holder in respect of the exchange of the Eligible
Holder's Allelix Common Shares for Exchangeable Shares pursuant to the Plan of
Arrangement, the Elected Amount must be elected in accordance with the following
rules:

1. The Elected Amount may not be less than the fair market value of Ancillary
   Rights acquired by the Eligible Holder on the exchange as partial
   consideration for the Allelix Common Shares to which the election applies.

2. The Elected Amount may not be less than the lesser of the adjusted cost base
   to the Eligible Holder of the Allelix Common Shares to which the election
   applies, determined immediately before the time of the exchange, and the fair
   market value of such share at that time.

                                     E-49
<PAGE>

3. The Elected Amount may not exceed the fair market value, at the time of the
   exchange, of the Allelix Common Shares to which the election applies.

   Where such an election is made, the tax treatment to the Eligible Holder (in
respect of such holder's Allelix Common Shares to which the election applies)
will, in general, be as follows:

1. The Eligible Holder will be deemed to have disposed of the Allelix Common
   Shares for proceeds of disposition equal to the Elected Amount.

2. If the proceeds of disposition of the Allelix Common Shares are equal to the
   aggregate of the adjusted cost base to the Eligible Holder of such shares,
   determined immediately before the exchange, and any reasonable costs of
   disposition, no capital gain or capital loss will be realized by the Eligible
   Holder.

3. To the extent that the proceeds of disposition of the Allelix Common Shares
   exceed the aggregate of the adjusted cost base thereof to the Eligible Holder
   of such shares, determined immediately before the exchange, and any
   reasonable costs of disposition, the Eligible Holder will, in general,
   realize a capital gain.

4. The cost to the Eligible Holder of Ancillary Rights received on the exchange
   will be equal to the fair market value thereof at that time and the cost to
   the Eligible Holder of Exchangeable Shares received on the exchange will be
   equal to the amount by which the proceeds of disposition of Allelix Common
   Shares exchanged by the Eligible Holder exceed the fair market value of
   Ancillary Rights received on the exchange.

   NPS Allelix will make an election pursuant to section 85 of the ITA only with
an Eligible Holder in respect of Allelix Common Shares exchanged, and at the
amount selected by the Eligible Holder subject to the limitations set out in the
ITA. Neither NPS Allelix nor the Depositary will be responsible for the proper
completion or filing of any election form and, except for NPS Allelix's
obligation to return duly completed election forms which are received by the
Depositary within 90 days of the Effective Date, within 30 days after the
receipt thereof by the Depositary, the Eligible Holder and not NPS Allelix will
be responsible or liable for any taxes, interest, penalties, damages or expenses
resulting from the failure by the Eligible Holder to properly complete or file
an election form in the form and manner and within the time prescribed by the
ITA (or the corresponding provision of any applicable provincial tax
legislation). In its sole discretion, NPS Allelix may choose to execute and
return an election form received more than 90 days following the Effective Date,
but NPS Allelix will have no obligation to do so. NPS Allelix agrees only to
execute any apparently correct and complete election form received within 90
days of the Effective Date and to return the executed election form (within 30
days after the receipt thereof by the Depositary) to the Eligible Holder. With
the exception of execution of the election by NPS Allelix, compliance with the
requirements for a valid election will be the sole responsibility of the
Eligible Holder making the election.

   In order for Revenue Canada to accept a tax election form without a late
filing penalty being paid by an Eligible Holder, the election form, duly
completed and executed by both the Eligible Holder and NPS Allelix must be
received by such revenue authorities on or before the day that is the earliest
of the days on or before which either NPS Allelix or the Eligible Holder is
required to file an income tax return for the taxation year in which the
exchange occurs. Eligible Holders are urged to consult their own adviser as soon
as possible respecting the deadlines applicable to their own particular
circumstances.

   However, regardless of such deadline, the tax election forms of Eligible
Holders must be received by the Depositary no later than the 90th day after the
Effective Date.

   Any Eligible Holder who does not ensure that the Depositary has received a
duly completed election form on or before the 90th day after the Effective Date,
will not be able to benefit from the rollover provisions of the ITA (unless NPS
Allelix in its sole discretion, chooses to execute an election form received
after such time). Accordingly, all Eligible Holders who wish to enter into an
election with NPS Allelix should give their immediate attention to this matter.
The instructions for requesting a tax election package are set out in the Letter
of Transmittal and Election Form. Eligible Holders are referred to Information
Circular 76-19R3 and Interpretation Bulletin IT-291R2 issued by Revenue Canada
for further information with respect to making an election under section 85 of
the ITA. Eligible Holders wishing to make the election should consult their own
tax advisers. The comments herein with respect to such elections are provided
for general assistance only. The law in this area is complex and contains
numerous technical requirements.

   For these purposes, an Eligible Holder will be required to determine the fair
market value of Ancillary Rights received on the exchange of Allelix Common
Shares on a reasonable basis for purposes of the ITA. Allelix is of the view,
and has advised Ernst & Young LLP, that such rights will have only nominal
value. The tax election forms will be executed by NPS Allelix on the basis that
the fair market value of Ancillary Rights is a nominal amount per Exchangeable
Share issued on the exchange. Such amount will be provided to Eligible Holders
in the letter of instructions included in the tax election package. Such
determination of value is not binding on Revenue Canada and Ernst & Young LLP is
not expressing a view on matters of factual determination such as this.

                                     E-50
<PAGE>

Exchange of Allelix Common Shares for NPS Common Shares.

  An Allelix Common Shareholder who exchanges Allelix Common Shares for NPS
Common Shares will be considered to have disposed of the Allelix Common Shares
exchanged for proceeds of disposition equal to the fair market value of NPS
Common Shares acquired by such holder on the exchange and, as a result, such
holder will in general realize a capital gain (or capital loss) to the extent
that such proceeds of disposition, net of any reasonable costs of disposition,
exceed (or are less than) the adjusted cost base to such holder of the Allelix
Common Shares immediately before the exchange. See "-- Taxation of Capital Gain
or Capital Loss" below. The cost to the Allelix Common Shareholder of NPS Common
Shares acquired on the exchange of Allelix Common Shares will be equal to the
fair market value of the NPS Common Shares at the time of the exchange, and must
be averaged with the adjusted cost base to such holder of other NPS Common
Shares held by such holder as capital property.

Call Rights

  Allelix is of the view, and has advised Ernst & Young LLP, that the
Liquidation Call Right, the Redemption Call Right and the Retraction Call Right
have nominal value. On this basis, no Allelix Common Shareholder should realize
a gain at the time that any of such rights are granted to NPS Holdings. Such
determinations of value are not binding on Revenue Canada and Ernst & Young LLP
is not expressing a view on matters of factual determination such as this.

Dividends

  Dividends on Exchangeable Shares.  In the case of a holder of Exchangeable
Shares who is an individual, dividends received or deemed to be received by the
holder on Exchangeable Shares will be included in computing the holder's income
and will be subject to the gross-up and dividend tax credit rules normally
applicable to taxable dividends received from taxable Canadian corporations.

  Subject to the discussion below as to the denial of the dividend deduction, in
the case of a holder of Exchangeable Shares that is a corporation, other than a
"specified financial institution" as defined in the ITA, dividends received or
deemed to be received by the holder on Exchangeable Shares will be included in
computing the holder's income and will normally be deductible in computing its
taxable income. A corporation will, in general, be a specified financial
institution for purposes of the ITA if it is a bank, a trust company, a credit
union, an insurance corporation or a corporation whose principal business is the
lending of money to persons with whom the corporation is dealing at arm's length
or the purchasing of debt obligations issued by such persons or a combination
thereof, a prescribed corporation, and corporations controlled by or related to
such entities.

  In the case of a holder of Exchangeable Shares that is a specified financial
institution, such a dividend will not be deductible in computing its taxable
income unless either: (i) the specified financial institution did not acquire
the Exchangeable Shares in the ordinary course of the business carried on by the
financial institution; or (ii) at the time of the receipt of the dividend by the
specified financial institution, the Exchangeable Shares are listed on a
prescribed stock exchange in Canada and the specified financial institution,
either alone or together with persons with whom it does not deal at arm's
length, does not receive and is not deemed to receive dividends in respect of
more than 10 percent of the issued and outstanding Exchangeable Shares.

  Exchangeable Shares will be "taxable preferred shares" and "short-term
preferred shares" for purposes of the ITA. Accordingly, NPS Allelix will be
subject to a 66 2/3 percent tax under Part VI.1 of the ITA on dividends (other
than "excluded dividends" as defined in the ITA) paid or deemed to be paid on
the Exchangeable Shares and will be entitled to deduct an amount equal to 9/4 of
the tax so payable in computing its taxable income for purposes of the ITA.
Dividends received or deemed to be received on Exchangeable Shares will not be
subject to the 10 percent tax under Part IV.1 of the ITA.

  Dividends on NPS Common Shares.  In the case of a holder of NPS Common Shares
who is an individual, dividends received or deemed to be received by the holder
on NPS Common Shares will be included in computing the holder's income and will
not be subject to the gross-up and dividend tax credit rules in the ITA. In the
case of a holder of NPS Common Shares that is a corporation, dividends received
or deemed to be received by the holder on NPS Common Shares will be included in
computing the holder's income and generally will not be deductible in computing
the holder's taxable income. United States non-resident withholding tax on
dividends generally will be eligible for foreign tax credit or deduction
treatment where applicable under the ITA.

Redemption, Retraction, Purchase or Exchange of Exchangeable Shares

  On the redemption (or retraction) of Exchangeable Shares, the holder of the
Exchangeable Shares (i) will receive a dividend equal to any declared and unpaid
dividend on each Exchangeable Share redeemed that was held by the holder on any
dividend record date which occurred prior to the Redemption Date, and (ii) will
be deemed to have received a dividend equal to the amount, if any, by which the
redemption (or retraction) proceeds (i.e. the fair market value at that time of
NPS Common Shares received by the holder of the Exchangeable Shares from NPS
Allelix on the redemption (or retraction) exceeds the paid-up capital (for
purposes of the ITA ) at the time of the redemption (or retraction) of the
Exchangeable Shares. The amount of any such dividend and/or deemed dividend will
be subject to the tax treatment described above under "-- Dividends -- Dividends
on Exchangeable Shares". On the redemption (or

                                     E-51
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retraction) of Exchangeable Shares, the holder of the Exchangeable Shares will
also be considered to have disposed of the Exchangeable Shares for proceeds of
disposition equal to the redemption (or retraction) proceeds less the amount of
such deemed dividend. The holder of the Exchangeable Shares redeemed (or
retracted) will, in general, realize a capital gain (or a capital loss) equal to
the amount by which the adjusted cost base to the holder of the Exchangeable
Shares immediately before redemption (or retraction) is less than (or exceeds)
such proceeds of disposition. See "-- Taxation of Capital Gain or Capital Loss"
below. In the case of a holder of Exchangeable Shares that is a corporation, in
some circumstances, the amount of any deemed dividend arising on redemption (or
retraction) may be treated as proceeds of disposition and not as a dividend.

  On the purchase for cancellation of Exchangeable Shares by NPS Allelix by
tender to all the registered holders of record of Exchangeable Shares then
outstanding, the holder of the Exchangeable Shares will be deemed to have
received a dividend equal to the amount, if any, by which the amount paid by NPS
Allelix for the Exchangeable Shares exceeds the paid-up capital (for purposes of
the ITA) at the time the Exchangeable Shares are purchased for cancellation. The
amount of any such deemed dividend will be subject to the tax treatment
described above under "Dividend -- Dividends on Exchangeable Shares". On the
purchase for cancellation of Exchangeable Shares, the holder of the Exchangeable
Shares will also be considered to have disposed of the Exchangeable Shares for
proceeds of disposition equal to the purchase proceeds less the amount of such
deemed dividend. The holder of the Exchangeable Shares purchased for
cancellation will, in general, realize a capital gain (or a capital loss) equal
to the amount by which the adjusted cost base to the holder of the Exchangeable
Shares immediately before such shares are purchased for cancellation is less
than (or exceeds) such proceeds of disposition. See "-- Taxation of Capital Gain
or Capital Loss" below. In the case of the holder of Exchangeable Shares that is
a corporation, in some circumstances, the amount of any deemed dividend arising
on the purchase for cancellation of the Exchangeable Shares may be treated as
proceeds of disposition and not as a dividend.

  On the purchase for cancellation of Exchangeable Shares by NPS Allelix through
the facilities of any stock exchange in which the Exchangeable Shares are listed
or quoted, the holder of the Exchangeable Shares so purchased for cancellation
will be considered to have disposed of the Exchangeable Shares for proceeds of
disposition equal to the amount received as consideration for the Exchangeable
Shares. The holder of the Exchangeable Shares purchased for cancellation will,
in general, realize a capital gain (or capital loss) equal to the amount by
which such proceeds of disposition, net of any reasonable costs of disposition,
exceed (or are less than) the adjusted cost base to the holder of the
Exchangeable Shares immediately before such shares are purchased for
cancellation. See "-- Taxation of Capital Gain or Capital Loss" below.

  On the exchange of Exchangeable Shares by the holder thereof with NPS or NPS
Holdings for NPS Common Shares, the holder of the Exchangeable Shares will
receive a dividend equal to any declared and unpaid dividend on each
Exchangeable Share exchanged that was held by the holder on any dividend record
date which occurred prior to the Exchange Date. The amount of any such dividend
will be subject to the tax treatment described above under "Dividends --
Dividends on Exchangeable Shares". The holder will also in general, realize a
capital gain (or a capital loss) to the extent the proceeds of disposition of
the Exchangeable Shares, net of any reasonable costs of disposition, exceed (or
are less than) the adjusted cost base to the holder of the Exchangeable Shares
immediately before the exchange. For these purposes, the proceeds of disposition
will be the aggregate of the fair market value, at the time of the exchange, of
NPS Common Shares received on the exchange. See "-- Taxation of Capital Gain or
Capital Loss" below.

  Because of the existence of the Call Rights, the Exchange Right and the
Automatic Exchange Right, a holder of Exchangeable Shares cannot control whether
such holder will receive NPS Common Shares by way of redemption (or retraction)
of the Exchangeable Shares by NPS Allelix or by way of purchase of the
Exchangeable Shares by NPS or NPS Holdings. As described above, the Canadian
federal income tax consequences of a redemption (or retraction) differ from
those of a purchase.

Acquisition and Disposition of NPS Common Shares

  The cost to a holder of NPS Common Shares who receives NPS Common Shares on
the redemption, retraction or exchange of Exchangeable Shares will be equal to
the fair market value of the NPS Common Shares at the time of such event and
will be averaged with the adjusted cost base of any other NPS Common Shares held
at that time by the holder as capital property.

  A disposition or deemed disposition of NPS Common Shares by a holder will
generally result in a capital gain (or capital loss) to the extent that the
proceeds of disposition, net of any reasonable costs of disposition, exceed (or
are less than) the adjusted cost base to the holder of such shares immediately
before the disposition.

Taxation of Capital Gain or Capital Loss

  Three-quarters of any capital gain (the "taxable capital gain") realized by an
Allelix Common Shareholder will be included in the Allelix Common Shareholder's
income for the year of disposition. Three-quarters of any capital loss so
realized (the "allowable capital loss") may be deducted by the Allelix Common
Shareholder against taxable capital gains for the year of disposition.

  Any excess of allowable capital losses over taxable capital gains for the year
of disposition may be carried back up to three taxation years or forward
indefinitely and deducted against net taxable capital gains in those other years
to the extent and in the

                                     E-52
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circumstances prescribed in the ITA.

  If the holder of an Allelix Common Share and/or Exchangeable Share is a
corporation, the amount of any capital loss arising on a disposition or deemed
disposition of any such share may be reduced by the amount of dividends received
or deemed to have been received by it on such share to the extent and under
circumstances prescribed by the ITA. Similar rules may apply where a corporation
is a member of a partnership or a beneficiary of a trust that owns an Allelix
common Share and/or Exchangeable Share or where a trust or partnership of which
a corporation is a beneficiary or a member is a member of a partnership or a
beneficiary of a trust that owns any such share.

Foreign Property Information Reporting

  In general, a "specified Canadian entity", as defined in the ITA, for a
taxation year or fiscal period whose total cost amount of "specified foreign
property", as defined in the ITA, at any time in the year or fiscal period
exceeds Cdn.$100,000, is required to file an information return for the year or
period disclosing prescribed information, including the cost amount, any
dividends received in the year, and any gains or losses realized in the year, in
respect of such property. With some exceptions, a taxpayer resident in Canada in
the year will be a specified Canadian entity. Exchangeable Shares and NPS Common
Shares will be specified foreign property to a holder. Accordingly, registered
holders of Exchangeable Shares, and/or NPS Common Shares should consult their
own advisers regarding compliance with these rules.

Eligibility for Investment

  Qualified Investments.  Provided the Exchangeable Shares are listed on a
prescribed stock exchange in Canada (which currently includes the TSE), the
Exchangeable Shares will be "qualified investments" for trusts governed by
RRSPs, RRIFs, DPSPs and "registered education savings plans", as defined in the
ITA. Similarly, NPS Common Shares will be qualified investments under the ITA
for such plans provided such shares remain listed on the NASDAQ Stock Market (or
are listed on another prescribed stock exchange). The Ancillary Rights will not
be qualified investments under the ITA for such plans. However, Allelix is of
the view that the fair market value of these rights is nominal.

  Foreign Property.  Provided the Exchangeable Shares are listed on a prescribed
stock exchange in Canada (which currently includes the TSE), the Exchangeable
Shares will not be foreign property under the ITA for trusts governed by RRSPs,
RRIFs, DPSPs, for registered pension plans or for certain other persons to whom
Part XI of the ITA applies. The Ancillary Rights will be foreign property under
the ITA. However, Allelix is of the view that the fair market value of these
rights is nominal. NPS Common Shares will be foreign property under the ITA.

Dissenting Shareholders

  A Dissenting Shareholder is entitled, if the Arrangement becomes effective, to
receive the fair value of Allelix Common Shares held by the Dissenting
Shareholder. The Dissenting Shareholder will be considered to have disposed of
the Allelix Common Shares for proceeds of disposition equal to the amount
received by the Dissenting Shareholder less the amount of any deemed dividend
referred to below. See "-- Taxation of Capital Gain or Capital Loss" above.
Where the amount is received from Allelix, the Allelix Common Shareholder also
will be deemed to receive a taxable dividend equal to the amount by which the
amount received exceeds the paid-up capital of such shareholder's Allelix Common
Shares. In the case of an Allelix Common Shareholder that is a corporation, in
some circumstances, the amount of any such deemed dividend may be treated as
proceeds of disposition and not as a dividend. Pursuant to Proposed Amendments,
a Dissenting Shareholder will not be entitled to the benefit of the "replacement
property" provisions of the ITA.

Allelix Common Shareholders Not Resident in Canada

  The following portion of the summary is applicable to an Allelix Common
Shareholder who, for purposes of the ITA, has not been and will not be resident
(or deemed resident) in Canada at any time while such Allelix Common Shareholder
has held Allelix Common Shares and will hold NPS Common Shares and/or
Exchangeable Shares and to whom such shares are not "taxable Canadian property"
(as defined in the ITA). Special rules, which are not discussed in this summary,
may apply to a non-resident that is an insurer carrying on business in Canada
and elsewhere.

  Generally, Allelix Common Shares, Exchangeable Shares and NPS Common Shares
will not be taxable Canadian property at a particular time provided that such
shares are listed on a prescribed stock exchange (which currently includes the
TSE), the holder does not use or hold, and is not deemed to use or hold, such
shares in carrying on a business in Canada and the holder, persons with whom the
holder does not deal at arm's length, or the holder together with all such
persons has not owned (or had under option) 25 percent or more of the issued
shares of any class or series of the capital stock of Allelix or NPS, as the
case may be, at any time during the 60-month period that ends at the particular
time.

                                     E-53
<PAGE>

Disposition of Allelix Common Shares, Exchangeable Shares and NPS Common Shares

  An Allelix Common Shareholder who is not a resident of Canada for purposes of
the ITA will not be subject to tax under the ITA on (i) the exchange of Allelix
Common Shares for NPS Common Shares or Exchangeable Shares for NPS Common
Shares, other than upon a redemption or retraction of such Exchangeable Shares
or to the extent NPS Holdings pays or credits a Dividend Amount to such holder,
(ii) the sale or other disposition of Exchangeable Shares, other than upon a
redemption, retraction or purchase for cancellation by tender to all holders of
record of Exchangeable Shares then outstanding, or (iii) the sale or other
disposition of NPS Common Shares.

  On the redemption, retraction or purchase for cancellation by tender to all
the holders of record of Exchangeable Shares by NPS Allelix, the holder of the
Exchangeable Shares will receive and/or be deemed to have received a dividend as
described under "Income Tax Considerations for Allelix Common Shareholders --
Allelix Common Shareholders Resident in Canada -- Redemption, Retraction,
Purchase or Exchange of Exchangeable Shares". Any such dividend and/or deemed
dividend will be subject to Canadian withholding tax at the rate of 25 percent
unless reduced by the provision of an applicable tax treaty.

Dividends and Interest

  Dividends (including deemed dividends) paid or credited (or deemed to be paid
or credited) to registered holders of Exchangeable Shares by Allelix and
Dividend Amounts paid or credited by NPS Holdings are subject to non-resident
withholding tax under the ITA at the rate of 25 percent unless such rate is
reduced under the provision of an applicable income tax treaty.

  Where an Allelix Common Shareholder is deemed to have received a taxable
dividend or interest consequent upon the exercise of Dissent Rights (see "Income
Tax Consideration to Allelix Common Shareholders -- Allelix Common Shareholders
Resident in Canada -- Dissenting Shareholders"), such amounts will be subject to
Canadian withholding tax at the rate of 25 percent unless the rate is reduced
under the provisions of an applicable tax treaty.

United States Federal Income Tax Considerations

  The following is a general discussion, prepared by Ernst & Young LLP of the
principal United States federal income tax considerations generally applicable
to U.S. Holders (as defined below) who receive NPS Common Shares and Non-U.S.
Holders (as defined below) who receive Exchangeable Shares or NPS Common Shares
pursuant to the Arrangement. For purposes of this discussion, a "U.S. Holder" is
a beneficial owner of Allelix Common Shares that is (i) a citizen or resident of
the United States, (ii) a corporation or other entity taxable as a corporation
organized under the laws of the United States or any state thereof, (iii) an
estate the income of which is subject to United States federal income taxation
regardless of source, or (iv) a trust if a United States court is able to
exercise primary supervision over the administration of such trust and one or
more United States persons have the authority to control all substantial
decisions of such trust. A "Non-U.S. Holder" is a beneficial owner of Allelix
Common Shares that is not a U.S. Holder.

  This summary does not address all aspects of United States federal income
taxation that may be applicable to U.S. Holders and Non-U.S. Holders
(collectively, "Holders") in light of their particular circumstances or to
Holders subject to special treatment under United States federal income tax laws
(including, without limitation, certain financial institutions, insurance
companies, tax-exempt entities, dealers in securities, certain United States
expatriates, persons who hold Allelix Common Shares as part of a straddle,
hedge, conversion transaction or other integrated investment, U.S. Holders whose
functional currency is not the U.S. dollar, and Holders who acquire Allelix
Common Shares through exercise of employee stock options or otherwise as
compensation). This discussion is limited to Holders who hold their Allelix
Common Shares as capital assets and does not consider the tax treatment of
Holders who hold Allelix Common Shares through a partnership or other pass-
through entity. In addition, this summary does not discuss aspects of United
States federal income taxation that may be applicable to registered holders of
Allelix Options, Allelix Preferred Shares, or Allelix Warrants, nor does it
address any aspect of state, local or foreign taxation.

  This discussion is based on current law, which is subject to change, possibly
with retroactive effect. No advance income tax ruling has been sought or
obtained from the IRS regarding the U.S. federal income tax consequences of the
Arrangement.

  EACH HOLDER IS ADVISED TO CONSULT ITS TAX ADVISER REGARDING THE UNITED STATES
FEDERAL, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES OF THE ARRANGEMENT.

U.S. Holders

  The following discussion applies only to U.S. Holders who receive NPS Common
Shares in exchange for their Allelix Common Shares. This discussion does not
address U.S. Holders who are Canadian Residents and who elect to receive
Exchangeable Shares pursuant to the Arrangement. Such U.S. Holders should
consult their tax advisers concerning the tax consequences of the Arrangement.

                                     E-54
<PAGE>

   The exchange of Allelix Common Shares for NPS Common Shares pursuant to the
Arrangement will be a taxable event for United States federal income tax
purposes. Consequently, a U.S. Holder will recognize income, gain or loss.

Non-Passive Foreign Investment Company (PFIC) Shares

   A U.S. Holder of non-PFIC shares will recognize gain or loss on the exchange
equal to the difference between the fair market value on the date of the
exchange of the NPS Common Shares received in the exchange and such U.S.
Holder's U.S. federal income tax basis in its Allelix Common Shares. In the case
of a U.S. Holder who dissents from the Arrangement, such gain or loss will be
equal to the difference between the amount of cash received and such U.S.
Holder's U.S. federal income tax basis in its Allelix Common Shares surrendered
in the exchange. Gain or loss on the exchange of Allelix Common Shares will be
capital gain or loss if such shares were held by a U.S. Holder as a capital
asset, and will be long-term capital gain or loss if the U.S. Holder held its
Allelix Common Shares for more than one year at the time of the exchange.

Passive Foreign Investment Company (PFIC) Shares

   For the reasons stated below, there is a possibility that the Allelix Common
Shares held by U.S. Holders (all or a portion thereof) are to be treated as
shares in a PFIC, as defined in section 1297 of the Internal Revenue Code. This
could occur, or may already have occurred, by virtue of the annual percentage of
Allelix's income which is passive, and/or the annual percentage of Allelix's
assets which are held for the purpose of producing passive income.

   Allelix has not determined if it is currently or has ever been a PFIC.
Accordingly, Allelix is not expressing any opinion on its current year or prior
years PFIC status. U.S. Holders are strongly urged to consult their U.S. tax
advisors concerning the PFIC status of their shares in Allelix.

   Certain U.S. income tax legislation contains rules governing PFICs, which can
have significant tax effects on U.S. Holders of foreign corporations. These
rules do not apply to non-U.S. Holders, or to U.S. Holders who recognize a loss
on the disposition of their Allelix Common Shares.

   Section 1297 of the Internal Revenue Code defines a PFIC as a corporation
that is not formed in the United States and, for any taxable year, either:

1. 75 percent or more of its gross income is passive income, which includes
   interest, dividends and certain rents and royalties; or

2. the average percentage, by fair market value, (or, if the company is a
   controlled foreign corporation or makes an election, by adjusted tax basis)
   of its assets that produce or are held for the production of passive income
   is 50 percent or more.

   A U.S. Holder who holds shares in a foreign corporation during any year in
which that corporation qualifies as a PFIC is subject to U.S. federal income
taxation under alternative tax regimes, depending upon whether certain elections
are made by that U.S. Holder. The following is a discussion of these alternative
tax regimes as generally applicable to U.S. Holders of Allelix Common Shares in
the event that Allelix is, or was at any time, a PFIC.

   A U.S. Holder of a PFIC who does not make either of the elections described
below is referred to in this discussion as a Non-electing U.S. Holder. A Non-
electing U.S. Holder is subject to special taxation rules under section 1291 of
the Internal Revenue Code with respect to:

1. gains realized on the disposition of his or her common shares, or deemed to
   be realized by reason of a pledge of his or her common shares; and

2. certain excess distributions received.

   A Non-electing U.S. Holder generally would be required to include in income,
pro rata, all gains realized on the disposition of his or her common shares, and
all excess distributions received, over the entire holding period for the PFIC
common shares. All gains or excess distributions allocated to prior years of the
U.S. Holder (other than years prior to January 1, 1987 for which the foreign
corporation was a PFIC) would be taxed at the highest tax rate for each prior
year applicable to ordinary income. The Non-electing U.S. Holder also would be
liable for interest on the foregoing tax liability for each prior year
calculated as if that liability had been due with respect to each prior year. A
Non-electing U.S. Holder that is not a corporation must treat this interest
charge as personal interest which is partially or wholly non-deductible. The
balance of the gain or the excess distribution will be treated as ordinary
income in the year of the disposition or distribution, and no interest charge
will be incurred with respect to that balance.

   If Allelix was a PFIC for any taxable year during which a Non-electing U.S.
Holder holds common shares, then Allelix will

                                     E-55
<PAGE>

continue to be treated as a PFIC with respect to those common shares, even if it
no longer qualifies definitionally as a PFIC. A Non-electing U.S. Holder may
terminate this deemed PFIC status by electing to recognize a gain as if those
common shares had been sold on the last day of the last taxable year for which
Allelix was a PFIC. This gain will be taxed under the rules discussed above for
Non-electing U.S. Holders.

  Alternatively, if Allelix is or was a PFIC, a U.S. Holder who owns common
shares is permitted generally to elect out of the tax treatment discussed above
if that U.S. Holder makes a mark-to-market election with respect to the common
shares. A U.S. Holder who so elects is referred to in this discussion as an
Electing U.S. Holder. Under this election, an Electing U.S. Holder would
generally recognize as ordinary income for each taxable year an amount equal to
the excess, if any, of the fair market value of common shares as of the close of
the taxable year over the Electing U.S. Holder's adjusted tax basis in those
shares. An Electing U.S. Holder would generally be allowed an ordinary
deduction, to the extent of any net mark- to-market gains recognized for prior
taxable years, for the excess, if any, of the adjusted tax basis of the common
shares over their fair market value as of the close of the taxable year. An
Electing U.S. Holder's adjusted tax basis of the common shares would generally
be adjusted to reflect the amounts included or deducted under the mark-to-market
election. Additionally, any gain on the actual sale or other disposition of the
common shares generally will be treated as ordinary income. Ordinary loss
treatment also would generally apply to any loss realized on the actual sale or
other disposition of the common shares to the extent that the amount of that
loss did not exceed the net mark-to-market gains previously included with
respect to those shares. An election to mark to market would generally apply to
the taxable year made and all subsequent taxable years. A mark-to-market
election is subject to complex and specific rules and requirements, and U.S.
Holders are strongly urged to consult their tax advisors concerning this
election if Allelix were classified as a PFIC.

  Finally, a U.S. Holder who elects in a timely manner to treat their PFIC
shares as a qualified electing fund ("QEF"), as defined in the Internal Revenue
Code, would be subject to another set of special rules different from those
described above. Although a QEF election may be beneficial to some U.S. Holders
depending upon their particular tax situations, it requires the foreign
corporation to annually make available certain information to those holders.
Allelix neither intends to make, nor in the past has ever made, this information
available. Accordingly, the QEF election has not been and is not available to
U.S. Holders.

  Holding NPS Common Shares.  The U.S. federal income tax basis of NPS Common
Shares received by a U.S. Holder will be equal to the fair market value of such
shares on the date of the exchange. The holding period for such shares will
begin on the date after the date of the exchange.

  For U.S. federal income tax purposes, a U.S. Holder of NPS Common Shares will
realize, to the extent of NPS' current and accumulated earnings and profits,
ordinary income on the receipt of a dividend distribution. To the extent, if
any, that distributions made by NPS to a U.S. Holder exceed the current and
accumulated earnings and profits of NPS, such distribution will be treated as a
tax-free return of capital to the extent of such U.S. Holder's U.S. federal
income tax basis for such shares, and to the extent in excess of such basis, as
capital gain. For U.S. Holders that are corporations, a dividends received
deduction may be available.

Non-U.S. Holders

Exchange of Allelix Common Shares

  Non-U.S. Holders will not be subject to United States federal income tax as a
result of an exchange of Allelix Common Shares for Exchangeable Shares or NPS
Common Shares pursuant to the Arrangement, unless such gain is effectively
connected with a United States trade or business of the Non-U.S. Holder (or, if
a tax treaty applies, is attributable to a permanent establishment of the Non-
U.S. Holder in the United States) or, in the case of gain recognized by an
individual Non-U.S. Holder, such individual is present in the United States for
183 days or more during the taxable year of disposition and certain other
conditions are satisfied.

Exchangeable Shares

  Dividends on Exchangeable Shares.  No statutory, judicial or administrative
authority exists that directly addresses the United States federal income tax
treatment of the Exchangeable Shares and, therefore, such treatment is subject
to some uncertainty. NPS and NPS Allelix have advised Allelix that, based on the
fact that the Exchangeable Shares will be issued by NPS Allelix, a Canadian
corporation, and dividends, if any on the Exchangeable Shares will be paid from
the cash flow and earnings generated by NPS Allelix and its subsidiaries, they
intend to treat dividends received by Non-U.S. Holders of Exchangeable Shares as
dividends distributed by NPS Allelix not subject to United States withholding
tax. If, contrary to this position, dividends on the Exchangeable Shares were
determined to constitute income from United States sources, Non-U.S. Holders of
Exchangeable Shares would likely be subject to United States withholding tax at
a rate of 30 percent, or any lower rate specified by an applicable income tax
treaty between the United States and the country of residence of the Non-U.S.
Holder. Under the Canada-United States Income Tax Convention, a maximum rate of
15 percent applies to dividends from United States sources distributed to
residents of Canada. See "-- NPS Common Shares -- Dividends on NPS Common
Shares" and "Backup Withholding and Information Reporting -- Dividends" below.

  Sale or Exchange of Exchangeable Shares.  A Non-U.S. Holder generally will not
be subject to United States federal income tax

                                     E-56
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on any gain realized on the sale or other taxable disposition of Exchangeable
Shares, including the exchange of Exchangeable Shares for NPS Common Shares,
unless such gain is effectively connected with a United States trade or business
of the Non-U.S. Holder (or, if a tax treaty applies, is attributable to a
permanent establishment of the Non-U.S. Holder in the United States) or, in the
case of gain recognized by an individual Non-U.S. Holder, such individual is
present in the United States for 183 days or more during the taxable year of
disposition and certain other conditions are satisfied. If it were to be
determined that the Exchangeable Shares should be treated as shares of NPS, see
the rules described below under "-- NPS Common Shares -- Sale or Exchange of NPS
Common Shares" and "-- Backup Withholding and Information Reporting -- Sale or
Exchange of NPS Common Shares".

NPS Common Shares

  Dividends on NPS Common Shares.  Dividends paid to a Non-U.S. Holder of NPS
Common Shares will generally be subject to withholding of United States federal
income tax at a rate of 30 percent (or such lower rate as may be specified by an
applicable income tax treaty) unless the dividend is (a) effectively connected
with the conduct of a trade or business by the Non-U.S. Holder within the United
States or (b) if a tax treaty applies, attributable to a United States permanent
establishment of the Non-U.S. Holder, in which case the dividend will be taxed
at ordinary United States federal income tax rates. A Non-U.S. Holder may be
required to satisfy certain certification requirements to claim treaty benefits
or otherwise claim a reduction of, or exemption from, the 30 percent United
States withholding tax described above. If the Non-U.S. Holder is a corporation,
any effectively connected income may also be subject to an additional "branch
profits tax".

  Sale or Exchange of NPS Common Shares.  A Non-U.S. Holder generally will not
be subject to United States federal income or withholding tax in respect of any
gain recognized on the sale or other disposition of NPS Common Shares unless (a)
the gain is effectively connected with the conduct of a trade or business by the
Non-U.S. Holder within the United States, or if a tax treaty applies, is
attributable to a permanent establishment of the Non-U.S. Holder in the United
States; (b) in the case of a Non-U.S. Holder who is an individual, the Non-U.S.
Holder is present in the United States for 183 or more days during the taxable
year of the sale or other disposition and certain other conditions are
satisfied; or (c) NPS is or has been a "U.S. real property holding corporation"
("USRPHC"), as discussed below.

  A USRPHC is a corporation organized under the laws of the United States or any
state thereof, and 50 percent or more of the assets of which (including assets
held indirectly through subsidiaries) consist of United States real property
interests. NPS has advised Allelix that it has not determined whether NPS is or
will become a USRPHC for United States federal income tax purposes. If NPS were
determined to be a USRPHC, a Non-U.S. Holder who owned (actually or
constructively) more than 5 percent of the NPS Common Shares would generally be
subject to United States federal income tax on any gain recognized on the sale
or other disposition of the NPS Common Shares as if such gain were effectively
connected with the conduct of a United States trade or business. Furthermore, if
the Exchangeable Shares were determined to be shares of NPS and NPS were a
USRPHC, a Non-U.S. Holder who owned (actually or constructively Exchangeable
Shares with a fair market value in excess of 5 percent of the fair market value
of the outstanding NPS Common Shares (determined at the time that the Non-U.S.
Holder first acquired such Exchangeable Shares) would likely be subject to
United States federal income tax on any gain recognized on such sale or other
disposition as if such gain were effectively connected with the conduct of a
United States trade or business. A Non-U.S. Holder who meets the 5 percent
ownership criteria set forth above should consult its tax adviser concerning the
United States federal income tax consequences to it if NPS were determined to be
a USRPHC.

Backup Withholding and Information Reporting

U.S. Holders

  In general, a U.S. Holder may be subject to backup withholding at the rate of
31 percent with respect to dividends paid on NPS Common Shares and to proceeds
from the sale, exchange or redemption of the NPS Common Shares, unless such U.S.
Holder (a) is a corporation or comes with certain other exempt categories and,
when required, demonstrates the fact, or (b) provides a correct taxpayer
identification number, certifies as to no loss of exemption from backup
withholding and otherwise complies with applicable requirements of the backup
withholding rules. A U.S. Holder of NPS Common Shares who does not provide a
correct taxpayer identification number may be subject to penalties imposed by
the IRS.

  Amounts withheld under the backup withholding rules may be credited against a
U.S. Holder's tax liability.

Non U.S. Holders

  United States backup withholding tax generally will not apply to dividends
paid on NPS Common Shares to a Non-U.S. Holder at an address outside the United
States. NPS must report annually to the IRS and to each Non-U.S. Holder the
amount of dividends paid to, and the tax withheld with respect to, such Non-U.S.
Holder, regardless of whether any tax was actually withheld. This information
may also be made available to the tax authorities in the Non-U.S. Holder's
country of residence.

                                     E-57
<PAGE>

  Sale or Exchange of NPS Common Shares.  Upon the sale or other disposition of
NPS Common Shares by a Non-U.S. Holder to or through a United States office of a
broker, the broker must backup withhold at a rate of 31 percent and report the
sale to the IRS, unless the Non-U.S. Holder certifies its Non-U.S. Holder status
under penalties of perjury or otherwise establishes an exemption. Upon the sale
or other disposition of NPS Common Shares by a Non-U.S. Holder to or through the
foreign office of a United States broker, or a foreign broker with certain types
of relationships to the United States, the broker must report the sale to the
IRS (but not backup withhold), unless the broker has documentary evidence in its
files that the seller is a Non-U.S. Holder and/or certain other conditions are
met, or the Non-U.S. Holder otherwise establishes an exemption.

  Amounts withheld under the backup withholding rules are generally allowable as
a credit against such Non-U.S. Holder's United States federal income tax
liability, if any, which may entitle such Non-U.S. Holder to a refund, provided
that certain required information is furnished to the IRS.

  On October 6, 1997, the IRS issued final regulations relating to the
withholding, information reporting and backup withholding on certain payments
made to Non-U.S. Holders, which are effective for payments made after December
31, 2000 (the "Final Regulations"). The Final Regulations alter the procedures
for claiming benefits under an income tax treaty and may also alter the
procedures for otherwise claiming a reduction of, or exemption from, the
withholding obligations described above. In addition, the Final Regulations
eliminate the current legal presumption that dividends paid to an address
outside the United States are paid to non-U.S. residents. Each Non-U.S. Holder
is urged to consult its tax adviser as to the effect, if any, of the final
regulations on its ownership and disposition of Exchangeable Shares or NPS
Common Shares.

                                     E-58
<PAGE>

                          INFORMATION CONCERNING NPS

Business of NPS

General

  NPS was incorporated in the State of Utah in 1986 and reincorporated in the
State of Delaware in 1992. NPS is engaged in the discovery and development of
small molecule drugs that are intended to address a variety of important
diseases. NPS' approach to the discovery of novel drugs is to identify new drug
targets and small molecules that modulate the activities of these targets, or
the activities of previously identified targets, in ways that provide unique and
effective therapies. NPS has pioneered the use of various whole cell and tissue
functional screens in its drug discovery programs. These functional screens
substantially enhance NPS' ability to discover new receptors and ion channels
and new drug candidates that modulate the activities of specific receptors or
ion channels through novel mechanisms. Functional screens were of critical
importance, for example, in its discovery of calcimimetic compounds that
modulate calcium receptor function as discussed below in more detail.

  NPS' most advanced programs focus on the development of small molecule drugs
for the treatment of hyperparathyroidism (HPT), for osteoporosis, for
neuroprotection in stroke and head trauma, and for epilepsy and bipolar
disorder. The HPT and osteoporosis programs arose from NPS' pioneering work on a
cell surface receptor, termed the "calcium receptor" or the "calcium sensing
receptor." This receptor detects levels of extracellular calcium and is involved
in numerous physiological processes. The neuroprotection program is based on
NPS' work on small molecules with novel activity at the NMDA (N-methyl-D-
aspartate) subtype of glutamate receptor-operated calcium channels. The
epilepsy/bipolar disorder program is based on NPS' work on small molecules that
belong to the same chemical class as valproic acid, but are structurally
distinct and have significantly different biological properties. In addition,
NPS is pursuing several discovery programs that are extensions of its research
on calcium receptors and ion channels.

Hyperparathyroidism

  In the field of HPT, NPS has established a research collaboration and license
arrangement with the Pharmaceutical Division of Kirin Brewery, Ltd. ("Kirin")
and a development and license arrangement with Amgen Inc. ("Amgen"). Before
entering into the arrangements with Kirin and Amgen, NPS initiated and conducted
four clinical trials in the United States with NPS R-568, its lead drug
candidate for the treatment of HPT. Under the Amgen agreement, on March 18,
1996, Amgen acquired full authority and assumed full responsibility for further
development and commercialization of a drug for the treatment of HPT in its
territory. In 1998, Amgen concluded dosing in a Phase II clinical trial using
NPS R-568 in secondary HPT patients (patients on kidney dialysis). Amgen has
since announced commencement of clinical trials with a second-generation
compound licensed from NPS. Amgen has indicated that this second generation
compound has more favourable metabolism and kinetic profiles than NPS R-568. In
addition, Amgen has announced that it has successfully completed a Phase I
safety trial with the second-generation compound, and began a Phase II clinical
trial with the second-generation calcimimetic in secondary HPT in the second
quarter of 1998, and began a Phase II clinical trial in primary HPT with the
same compound in the third quarter of 1998. Amgen continues to conduct Phase II
clinical trials with the second generation compound.

  While the HPT program is licensed to Amgen for most of the world, Kirin is
NPS' licensee in Asia. Effective June 30, 1995, Kirin acquired full authority
and assumed full responsibility for the development of a calcimimetic drug
program for HPT in Japan, China, Hong Kong, North and South Korea, and Taiwan.
Kirin began a Phase II clinical trial of NPS R-568 in Japan in December 1997,
for which NPS earned a $2.0 million milestone payment. Kirin has announced that
it will pursue development in Japan on the same second generation compound which
Amgen has taken into clinical development in the United States. Amgen and Kirin
have agreed to share with each other data generated from their respective
development activities with the second generation compound. NPS is working with
Amgen and Kirin to discover, identify, and characterize additional backup and
second generation compounds for the treatment of HPT. There can be no assurance
that the clinical trials will proceed as indicated or that a drug for the
treatment of HPT will prove safe and/or effective, meet applicable regulatory
standards, or be successfully marketed.

Osteoporosis

  In conjunction with SmithKline Beecham, NPS is applying calcium receptor
technology to discovering, identifying, and characterizing orally active
therapeutics for the treatment of osteoporosis. Osteoporosis is an age-related
disorder that affects more than 200 million people worldwide, and is
characterized by reduced bone density and an increased susceptibility to
fractures. Among the elderly in particular, osteoporosis is a major cause of
morbidity and mortality. The NPS and SmithKline Beecham research is focused on
the stimulation of bone formation. Most osteoporosis patients are diagnosed only
after they have already lost significant bone mass. As a result, a therapy that
not only halts further bone loss, but that also builds new bone, would
constitute a significant advancement in the treatment of osteoporosis. Under the
collaboration with SmithKline Beecham, research efforts are being conducted to
find small molecules that will stimulate bone formation. In January 1996, NPS
received a milestone payment of $3.0 million from

                                     E-59
<PAGE>

SmithKline Beecham for progress made in this program. In November 1997, the term
of the research support obligation of SmithKline Beecham was extended for an
additional period of up to three years. There can be no assurance that lead
molecules will be identified, that preclinical and clinical trials will proceed,
or that these molecules will prove safe and/or effective, meet applicable
regulatory standards, or be successfully marketed.

Neuroprotection

  NPS has conducted research on a new class of compounds that modulate certain
calcium channels. In this program NPS has selected a lead compound, NPS 1506,
and focused its initial clinical development on neuroprotection in stroke and
head trauma; other indications are being evaluated. The influx of calcium
through glutamate receptor-operated calcium channels has been linked to a number
of neurological disorders, including nerve cell death following stroke and head
trauma. NPS 1506 and other compounds in this series antagonize NMDA receptor-
operated calcium channels thereby reducing the influx of calcium. These
compounds demonstrated neuroprotectant activity in preclinical animal models of
stroke and head trauma. It appears that NPS 1506 works through a novel mechanism
and exhibits potentially advantageous pharmacological properties. In July 1997,
NPS began a Phase I clinical trial for NPS 1506 in healthy male volunteers. This
Phase I trial was completed in the second quarter of 1998. Results of the trial
indicated that NPS 1506 was safe and well tolerated. A Phase Ib trial was
initiated in July 1998 to assess safety and tolerability in patients who had
recently suffered a stroke. The clinical phase of this trial has been completed
and NPS expects to complete the evaluation of the study data in 1999. NPS
continues to formulate its clinical development plan. Future development of NPS
1506 and related compounds will be determined in conjunction with its efforts to
find a partner to assist in the development of these compounds. There can be no
assurance that NPS 1506 will be pursued further for stroke, head trauma, or
other indications, or that any of the other compounds in this series will
advance through clinical development, that NPS 1506 or any other compound from
this series will prove safe and/or effective, meet applicable regulatory
standards, or be successfully marketed.

Epilepsy and Bipolar

  NPS has initiated clinical testing of a proprietary compound, NPS 1776,
proposed for the initial indications of epilepsy and bipolar disorder. NPS
believes that NPS 1776 may be effective in the treatment of diseases such as
epilepsy and bipolar disorder. "Epilepsy" refers to a family of more than 40
neurological conditions characterized by aberrant brain activity that results in
a variety of seizure types. It affects roughly 2.5 million Americans. Bipolar
disorder is characterized by the occurrence of both manic and depressive states,
usually in alteration. Bipolar disorder affects about 2.5 million people in the
United States. NPS 1776 is an orally active, small molecule drug that has
demonstrated significant anticonvulsant safety properties in preclinical
studies. In September 1998, NPS began clinical trials in the United Kingdom in
healthy male volunteers to evaluate the safety and pharmacokinetics of the
molecule. This trial was concluded in December 1998 and another trial was
commenced, also in the United Kingdom, to confirm safety and tolerability in
volunteers receiving multiple doses of the drug. NPS is preparing a development
plan for further clinical trials to be conducted in the United States. Future
development of NPS 1776 will be determined in conjunction with efforts to find a
partner to assist in the development of this compound. There can be no assurance
that NPS 1776 will advance through clinical development, will prove safe and/or
effective, meet applicable regulatory standards, or be successfully marketed.

Discovery Programs

  Historically, NPS has engaged in discovery programs that seek to identify
molecular targets for the development of new drugs. Among these, current
activity focuses on other applications of calcium receptor technology and
metabotropic glutamate receptors (mGluRs). Significant discoveries have been
made with regard to novel forms of mGluRs. Small molecules active at these
receptors have been identified. Drugs acting at specific mGluRs may provide
relevant therapies for a number of neurological disorders. NPS is seeking a
partner to assist in the development of the mGluR program. There can be no
assurance that NPS will be successful in identifying lead compounds active at
mGluRs, and that development of these compounds will prove to be safe and/or
effective, meet applicable regulatory standards, or be successfully marketed.

In-Licensing and Product Acquisition

  Periodically, NPS evaluates alternatives for acquisition of late-stage product
opportunities. This evaluation includes the consideration of merger and
acquisition candidates and the search for in-licensing or joint venture
development candidates. To date, the Transaction is the only such arrangement
NPS has pursued to agreement. There can be no assurance that NPS will be able to
negotiate acceptable licenses and/or collaborative agreements in the future or
that efforts under any license and/or collaborative agreement will be
successful.

Patents and Proprietary Technology

  NPS' success will depend in part on its ability to obtain patents, maintain
trade secrets and operate without infringing on the proprietary rights of
others, both in the United States and other countries. Periodically, NPS files
patent applications to protect technology, inventions, and improvements that may
be important to the development of its business. NPS relies on trade secrets,

                                     E-60
<PAGE>

know-how, continuing technological innovations, and licensing opportunities to
develop and maintain its competitive position.

  NPS files patent applications in its own name, and when appropriate, files and
expects to continue to file, applications jointly with collaborators. These
patent applications cover compositions of matter, methods of treatment, methods
of discovery, use of novel compounds and novel modes of action, and
recombinantly expressed receptors and gene sequences that are important in its
research and development activities.

Manufacturing

  NPS anticipates that all products from its current programs will be made by
synthetic chemical manufacturing techniques. As such, NPS believes the compounds
can be precisely defined and characterized and should have relatively low
manufacturing costs compared to current pharmaceutical industry costs and
compared to recombinant proteins that are produced by the fermentation methods
common to currently available biotechnology products.

  NPS has no manufacturing facilities. Under the Amgen, Kirin, and SmithKline
Beecham agreements, each licensee is responsible for the manufacture of the
applicable product. NPS relies on other manufacturers to produce the proprietary
compounds for research and development activities and in sufficient quantities
for preclinical and clinical purposes.

Documents Incorporated

  The following documents, filed by NPS with the SEC and reproduced as
Appendices to the Circular, are specifically incorporated in and form an
integral part of this Circular:

  (a) NPS' Annual Report on Form 10-K/A for the fiscal year ended December 31,
      1998 (including Management's Discussion and Analysis of Financial
      Condition and Results of Operations) which is attached to this Circular as
      Appendix J, without exhibits;

  (b) NPS' 1999 Definitive Proxy Statement on Schedule 14A dated April 21, 1999
      with respect to the NPS annual meeting of stockholders held on May 26,
      1999, which is attached to this Circular as Appendix K;

  (c) NPS' Quarterly Report on Form 10-Q for the quarterly period ended March
      31, 1999, which is attached to this Circular as Appendix L;

  (d) NPS' Quarterly Report on Form 10-Q for the quarterly period ended June 30,
      1999, which is attached to this Circular as Appendix M;

  (e) NPS' Quarterly Report on Form 10-Q for the quarterly period ended
      September 30, 1999, which is attached to this Circular as Appendix N; and

  (f) NPS' Current Reports on Form 8-K dated October 1, 1999 and November 11,
      1999 which are attached to this Circular as Appendix O.

  Any interim financial statements or Form 8-K reports filed by NPS with the SEC
after the date of this Circular and prior to the Effective Time shall be deemed
to be incorporated by reference in this Circular.

  Any statement contained in a document incorporated or deemed to be
incorporated herein shall be deemed to be modified or superseded for the
purposes of this Circular to the extent that a statement contained herein, or in
any other subsequently filed document which also is or is deemed to be
incorporated herein, modifies or supersedes that statement. Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Circular. The making of a modifying or superseding
statement shall not be deemed an admission for any purposes that the modified or
superseded statement, when made, constituted a misrepresentation, an untrue
statement of a material fact or an omission to state a material fact that is
required to be stated or that is necessary to make a statement not misleading in
light of the circumstances in which it was made. Allelix assumes no
responsibility for the above documents relating to NPS and its Affiliates filed
by NPS with the SEC.

Share Capital Matters

  The following summary of certain provisions of NPS' capital stock describes
all material provisions of, but does not purport to be complete and is subject
to, and qualified in its entirety by, NPS' Amended and Restated Certificate of
Incorporation and NPS' Amended and Restated By-laws and by the provisions of
Applicable Law.

Capital Stock Generally

                                     E-61
<PAGE>

  NPS' Certificate of Incorporation provides that the authorized capital stock
of NPS is 20,000,000 NPS Common Shares, U.S.$.001 par value, and 5,000,000
shares of preferred stock, U.S.$.001 par value. As of November 8, 1999, there
were 12,967,519 NPS Common Shares outstanding and no shares of preferred stock
outstanding. Upon completion of the Arrangement, NPS' Certificate of
Incorporation will be amended to increase the authorized capital stock to
45,000,000 NPS Common Shares and 5,000,000 shares of preferred stock. There will
be one share of preferred stock outstanding upon completion of the Arrangement
(see "-- NPS Special Voting Share"). NPS also has a Shareholder Rights Plan
providing for the issuance of rights to purchase shares of preferred stock upon
the occurrence of certain events related to an unsolicited tender offer or
takeover bid (see "-- Shareholders Rights Plan").

Common Shares

  The registered holders of NPS Common Shares are entitled to one vote for each
share held of record on all matters submitted to a vote of the stockholders. The
registered holders of NPS Common Shares are not entitled to cumulative voting
rights with respect to the election of directors and, as a consequence, minority
stockholders will not be able to elect directors on the basis of their votes
alone. Subject to preferences that may be applicable to any then outstanding
shares of preferred stock, registered holders of NPS Common Shares are entitled
to receive rateably such dividends as may be declared by the Board out of funds
legally available therefor. In the event of a liquidation, dissolution, or
winding up of NPS, registered holders of the NPS Common Shares are entitled to
share rateably in all assets remaining after payment of liabilities and the
liquidation preference of any then outstanding preferred stock. Registered
holders of NPS Common Shares have no pre-emptive rights and no right to convert
their NPS Common Shares into any other securities. There are no redemption or
sinking fund provisions applicable to the NPS Common Shares.

Preferred Stock

  The board of directors of NPS has the authority, without further action by the
stockholders, to issue up to 5,000,000 shares of preferred stock in one or more
series and to fix the rights, preferences, privileges, and restrictions thereof,
including dividend rights, conversion rights, voting rights, terms of
redemption, liquidation preferences, sinking fund terms, and the number of
shares constituting any series or the designation of such series. The issuance
of preferred stock could adversely affect the voting power of registered holders
of NPS Common Shares and the likelihood that such holders will receive dividend
payments and payments upon liquidation and could have the effect of delaying,
deferring, or preventing a change in control of NPS.

NPS Special Voting Share

  A single share of special voting preferred stock of NPS will be authorized for
issuance pursuant to the Arrangement Agreement. Except as otherwise required by
law or by NPS' Amended and Restated Certificate of Incorporation, the NPS
Special Voting Share will possess a number of votes equal to the number of
outstanding Exchangeable Shares from time to time not owned by NPS or its
Affiliates, which votes may be exercised for the election of directors and on
all other matters submitted to a vote of the registered holders of NPS Common
Shares. The registered holders of NPS Common Shares and the holder of the NPS
Special Voting Share will vote together as a class on all matters, except as
otherwise required by law. Pursuant to the Arrangement Agreement, the NPS
Special Voting Share will be issued to the Trustee appointed under the Voting
and Exchange Trust Agreement. In the event of a Liquidation Event, all
outstanding Exchangeable Shares will automatically be exchanged for NPS Common
Shares. The holder of the NPS Special Voting Share will not be entitled to
receive dividends, and in the event of any liquidation, dissolution, or winding-
up of NPS, will receive an amount equal to the par value thereof. At such time
as the NPS Special Voting Share has no votes attached to it because there are no
Exchangeable Shares outstanding not owned by NPS or its Affiliates, the NPS
Special Voting Share will cease to have any rights (see "The Arrangement --
Transaction Mechanics and Description of Exchangeable Shares -- Voting, Dividend
and Liquidation Rights of Registered Holders of Exchangeable Shares; Withholding
Rights -- Voting Rights with Respect to NPS").

Shareholders Rights Plan

  The Shareholders Rights Plan provides for the distribution of a preferred
stock purchase right ("Right") as a dividend for each outstanding NPS Common
Share. This right entitles registered holders of NPS Common Shares to acquire
stock in NPS or in an acquirer of NPS at a discounted price in the event that a
person or group acquires 20 percent or more of NPS' outstanding voting stock or
announces a tender or exchange offer that would result in ownership of 20
percent or more of NPS' stock. Each Right entitles the registered holder to
purchase from NPS 1/100th of a share of Series A Junior Participating Preferred
Stock, par value U.S.$.001 per share at a price of U.S.$50 per 1/100th of a
preferred stock, subject to adjustment. The Rights may only be exercised on the
occurrence of certain events related to a hostile takeover of NPS as described
above. In any event, the Rights will expire on December 31, 2001. The Rights may
be redeemed by NPS at U.S.$.01 per Right at any time prior to expiration or the
occurrence of an event triggering exercise.

Stock Exchange Listings

  The NPS Common Shares are quoted on the NASDAQ Stock Market.

                                     E-62
<PAGE>

Principal Holders of Common Stock

  Allelix has been advised by NPS that the following table sets forth the number
of NPS Common Shares held by each person known to NPS to beneficially own more
than 10 percent of NPS Common Shares as of September 30, 1999:

<TABLE>
<CAPTION>
                                                                                             Amount of       Percent of NPS
                                                                                             Beneficial         Common
                          Name and Address of Beneficial Owner                               Ownership         Shares(1)
                     ------------------------------------------------------------------     -------------    --------------
                     <S>                                                                    <C>              <C>
                     Wellington Management Company, LLP(2).............................       1,656,300             13.02%
                     75 State Street
                     Boston, MA 02109
                     BVF Partners, L.P.(3).............................................       1,393,600             11.00%
                     333 West Wacker Drive, Suite 1600
                     Chicago, IL 60606
                     T. Rowe Price Associates, Inc.(4).................................       1,600,000             12.58%
                     100 E. Pratt Street
                     Baltimore, MD 21202
</TABLE>

(1) The number of NPS Common Shares issued and outstanding on September 30, 1999
    was 12,718,719 shares. The calculation of percentage ownership for each
    listed beneficial owner is based upon the number of NPS Common Shares issued
    and outstanding at September 30, 1999. The persons and entities named in the
    table have sole voting and investment power with respect to all shares shown
    as beneficially owned by them, except as noted below.

(2) Wellington Management Company, LLP, a registered investment adviser, is
    deemed to have beneficial ownership of 1,656,300 NPS Common Shares. Such
    shares are owned of record by clients of Wellington Management. Wellington
    Management shares voting power with respect to 1,506,800 of such shares and
    dispositive power with respect to all of such shares.

(3) BVF Partners, L.P. and BVF, Inc. share voting and dispositive power with
    respect to all of these shares and with Biotechnology Value Fund, L.P. with
    respect to 738,288 of the shares.

(4) These securities are owned by various individual and institutional investors
    including T. Rowe Price New Horizons Fund, Inc. which owns 1,300,000 shares,
    which represents 10.29% of the shares outstanding, for which T. Rowe Price
    Associates, Inc. serves as investment adviser with power to direct
    investments and/or sole power to vote the securities. For purposes of the
    reporting requirements of the Securities Exchange Act of 1934, T. Rowe Price
    Associates is deemed to be a beneficial owner of such securities; however,
    T. Rowe Price Associates expressly disclaims that it is, in fact, the
    beneficial owner of such securities.

The above table is based upon information supplied by principal stockholders and
Schedules 13D and 13G filed with the SEC. Beneficial ownership is determined in
accordance with the rules of the SEC and generally includes voting or investment
power with respect to securities.

Auditors, Transfer Agent and Registrar

  The auditors for NPS are KPMG, LLP, and the transfer agent and registrar for
the NPS Common Shares is American Securities Transfer and Trust, Inc.

                      INFORMATION CONCERNING NPS ALLELIX

NPS Allelix

  NPS Allelix is a direct wholly-owned subsidiary of NPS Holdings (and an
indirect wholly-owned subsidiary of NPS) formed under the Companies Act (Nova
Scotia) on November 12, 1999 for the purpose of implementing the Arrangement.
Allelix has been advised by NPS that NPS Allelix's only material assets upon
completion of the Arrangement will be the issued and outstanding Allelix Common
Shares. NPS Allelix's registered office address is Suite 900, Purdy's Wharf
Tower One, 1959 Upper West Street, Halifax, Nova Scotia, B3J 2X2.

Directors and Officers

  The directors of NPS Allelix are:

  Hunter Jackson
  James U. Jensen

  The officers of NPS Allelix are:

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<PAGE>

                         Hunter Jackson       President
                         James U. Jensen      Vice President and Secretary
                         Robert K. Merrell    Vice President and Treasurer
                         Kevin J. Ontiveros   Assistant Secretary and Assistant
                                              Treasurer

  All of the officers of NPS Allelix are currently officers of NPS or its
Affiliates.

Share Capital Matters

  The following summary of certain provisions of NPS Allelix's share capital
describes all material provisions of NPS Allelix's share capital, but does not
purport to be complete and is subject to, and qualified in its entirety by, NPS
Allelix's Memorandum and Articles and by the provisions of Applicable Law. See
the Exchangeable Share Provisions attached to the Plan of Arrangement, which is
attached as Appendix D hereto.

  Common Shares. As of November 12, 1999, there were 100,000 common shares of
NPS Allelix outstanding, held by NPS Holdings. The registered holders of common
shares of NPS Allelix are entitled to receive notice of and to attend all
meetings of the shareholders and are entitled to one vote for each share held of
record on all matters submitted to a vote of registered holders of common shares
of NPS Allelix. Subject to the prior rights of the registered holders of any
shares ranking senior to the common shares of NPS Allelix with respect to
priority in the payment of dividends, the registered holders of common shares of
NPS Allelix are entitled to receive such dividends as may be declared by the
board of directors of NPS Allelix out of funds legally available therefor.
Registered holders of common shares of NPS Allelix are entitled upon any
liquidation, dissolution or winding-up of NPS Allelix, subject to the prior
rights of the registered holders of the Exchangeable Shares or any other shares
ranking senior to the NPS Allelix common shares, to receive the remaining
property and assets of NPS Allelix.

  Preference Shares.  The capital of NPS Allelix also includes 100 non-voting
preference shares. Subject to the prior rights of the holders of any shares
ranking senior to the preference shares, the registered holders of the
preference shares are entitled to receive, and NPS Allelix shall pay to such
holders as and when declared by the directors out of the moneys of NPS Allelix
properly applicable to the payment of dividends, cumulative preferred cash
dividends at the rate of $10.00 per year. Dividends on the preference shares
shall accrue from and including the date of issue thereof. The preference shares
are subject to mandatory redemption by NPS Allelix five years after the date of
issuance upon payment of, and on a liquidation, dissolution or winding-up of NPS
Allelix the holders of the preference shares are entitled to receive an amount
equal to $100.00 per share plus any accrued and unpaid dividends. Allelix has
been advised by NPS that it anticipates all 100 such preference shares will be
issued on or prior to completion of the Arrangement.

  Exchangeable Shares.  See "The Arrangement -- Transaction Mechanics and
Description of Exchangeable Shares" for a summary of certain provisions of the
Exchangeable Shares.

Transfer Agent and Registrar

  The Transfer Agent and registrar for the Exchangeable Shares will be CIBC
Mellon Trust Company.

                        INFORMATION CONCERNING ALLELIX

Business of Allelix

  Allelix is governed by the provisions of the CBCA. Allelix was originally
incorporated in 1981 as Allelix Inc. and its original emphasis was on
agricultural biotechnology and human diagnostics. In October 1989, as a result
of a management buy-out, Allelix redirected its focus to human therapeutics and
changed its name to Allelix Biopharmaceuticals Inc.

  Allelix is a biopharmaceutical company that applies proprietary technologies
to the identification of disease targets and to the discovery, design and
development of novel pharmaceutical products. Products will either be
commercialized in partnership with leading biotechnology and multinational
pharmaceutical companies for global markets or by Allelix itself for identified
market indications.

  Allelix discovers products by applying chemical and biological approaches to
disease targets identified through biotechnology. Allelix has completed a Phase
II clinical trial for its leading product candidate: ALX1-11, a recombinant form
of human parathyroid hormone, for the treatment of postmenopausal osteoporosis
and is preparing to initiate a Phase III trial in the first half of 2000. ALX-
0600, for gastrointestinal disorders, has completed Phase I and is recruiting
patients for a pilot Phase II trial in short bowel syndrome. ALX-0646, for
migraine, is approaching Phase II trials and ALE-26015, for dementia, is in
Phase I trials. The product pipeline includes a series of GlyT-1 and GlyT-2
inhibitors for schizophrenia and pain together with other neuroscience
compounds. Allelix has developed core capabilities in two areas of
pharmaceutical drug discovery: protein therapeutics (particularly recombinant
production

                                     E-64
<PAGE>

of proteins and peptides) and receptor- and transporter-based drug design
(focussed specifically in neuroscience). Allelix believes that these core
capabilities represent technology platforms, which can be applied to support
development of additional product candidates.

  Allelix discovers, patents and develops promising lead compounds as human
therapeutics. If such products are successfully commercialized, they typically
enjoy significant periods of market exclusivity (depending on patent protection
granted). To achieve profitable operations Allelix, alone or with others, must
successfully develop and obtain regulatory approvals to market its products. To
obtain these regulatory approvals and to achieve commercial success clinical
trials must demonstrate that the products are safe for use in humans and that
they are effective. There can be no assurances that the research and development
conducted by Allelix will result in commercially viable products.

  All of Allelix's products are in either the research or the development stage
and therefore Allelix does not generate revenue from product sales. Allelix
funds its operations with the proceeds from collaborations with corporate
partners, the sale of equity, interest income and government grants and loans.

  Allelix forms strategic collaborations with established pharmaceutical
companies to exploit fully its technological strengths in drug discovery and
gain access to worldwide pharmaceutical markets. Allelix currently has three
significant collaborative agreements with established pharmaceutical companies:
two agreements with Eli Lilly Canada Inc. to discover new drugs for psychiatric,
neurological and eating disorders, and an agreement with Janssen Pharmaceutica
N.V. to discover new drugs for schizophrenia and/or dementia. To strengthen and
accelerate its research and development efforts, Allelix also has established a
network of collaborations with universities, academics, clinicians and research
institutions.

  In deciding to initiate, continue or discontinue scientific programs,
management rigorously evaluates each discovery target and product candidate from
a commercial perspective, focusing on unmet or underserved medical needs which
represent significant commercial opportunities. Market size, development cost,
competitive environment, intellectual property protection, and attractiveness to
potential pharmaceutical industry partners, among other factors impact the
commercial opportunity.

  Allelix's business strategy is to enhance shareholder value by bringing novel
products to market as rapidly as possible; developing technology platforms for
drug discovery and development; collaborating with established pharmaceutical
companies for broad-based clinical trials and worldwide commercialization; while
building and maintaining strong relationships with universities, academics,
clinicians and research institutions to gain access to novel product candidates
and technologies. Patent protection is secured wherever possible. It is
Allelix's full intent to reach profitability in as short a time period as
possible.

  Allelix's business is divided into two primary areas: Protein Therapeutics and
Neuroscience.

  The primary focus within Protein Therapeutics is the development and
commercialization of protein-based drugs for treating medical diseases or
disorders related to hormone abnormalities or deficiencies, for example, PTH
(Parathyroid Hormone) for the treatment of post-menopausal osteoporosis. The
group has experience in microbiology, protein manufacturing, purification and
analytical chemistry.

  The primary focus within Neuroscience is the use of rational drug design to
develop novel drug candidates for the treatment of psychiatric, neurological and
immunological disorders. The group has demonstrated its ability to discover and
utilize human neuroreceptors, ion channels and neurotransporters for drug
screening. The group is currently developing product candidates for
neuropsychiatric disorders such as schizophrenia and dementia, pain (migraine
and neuropathic) as well as diabetes and obesity.

Documents Incorporated by Reference

  The following documents, filed by Allelix with the Canadian securities
regulatory authorities are specifically incorporated by reference in and form an
integral part of this Circular:

  (a) Allelix's Annual Information Form dated January 14, 1999;

  (b) Allelix's Management Proxy Circular dated November 30, 1998;

  (c) Allelix's Consolidated Financial Statements for the year ended
      August 31, 1999, which are attached to this Circular as Appendix P;

  (d) Allelix's Management's Discussion and Analysis for the year ended
      August 31, 1999, which is attached to this Circular as Appendix Q; and

  (e) Allelix's Material Change Reports dated October 6, 1999 and
      November 15, 1999.

                                     E-65
<PAGE>

  Any documents of the type referred to in the preceding paragraph (excluding
confidential material change reports) filed by Allelix with the Canadian
securities regulatory authorities after the date of this Circular and prior to
the Effective Time shall be deemed to be incorporated by reference in this
Circular.

  Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for the purposes of this Circular to the extent that a statement contained
herein, or in any other subsequently filed document which also is or is deemed
to be incorporated by reference herein, modifies or supersedes that statement.
Any statement so modified or superseded shall not be deemed, except as so
modified or superseded, to constitute a part of this Circular. The making of a
modifying or superseding statement shall not be deemed an admission for any
purposes that the modified or superseded statement, when made, constituted a
misrepresentation, an untrue statement of a material fact or an omission to
state a material fact that is required to be stated or that is necessary to make
a statement not misleading in light of the circumstances in which it was made.

1999 Financial Results and Management's Discussion and Analysis of Financial
Condition and Results of Operations

  On October 21, 1999 the board of directors of Allelix approved Allelix's
Consolidated Financial Statements for the year ended August 31, 1999, a copy of
which is attached to this Circular as Appendix P. A copy of management's
discussion and analysis of financial condition and results of operations of
Allelix for the year ended August 31, 1999 is attached to this Circular as
Appendix Q.

Information Concerning Forward-looking Statements

  Statements in the preceding section, Management's Discussion and Analysis of
Financial Condition and Results of Operations, to the extent not based on
historical events, constitute forward-looking statements. Forward-looking
statements include, without limitation, statements evaluating market and general
economic conditions and statements regarding future-oriented costs and
expenditures. Investors are cautioned not to place undue reliance on these
forward-looking statements, which reflect management's analysis only as of the
date thereof. These forward-looking statements are subject to certain risks and
uncertainties that could cause actual results to differ materially. Such risks
and uncertainties with respect to Allelix include the effect of general economic
conditions, Year 2000 risks, and actions by government regulatory authorities.

Directors and Officers

  On November 8, 1999, the directors and officers of Allelix as a group
beneficially owned or had voting control or direction over 4,394,329 Allelix
Common Shares carrying approximately 21.8 percent of the number of votes
entitled to be cast at the Allelix Meeting by the Allelix Common Shareholders.

  As of the date hereof, the name and municipality of residence of each director
and officer of Allelix, the date when each became a director or officer and the
principal occupation of each during the past five years were as follows:

<TABLE>
<CAPTION>
                                                                                                                    Director/
                                                                                                                     Officer
            Name/Residence                                    Position               Principal Occupation             Since
          ------------------------------------        -----------------------  ------------------------------      ----------
          <S>                                         <C>                      <C>                                 <C>
          George E. Connell...................        Director                 President Emeritus,                   1995
          Toronto, Ontario                                                     University of Toronto
          William W. Crouse...................        Director                 Managing Director, HealthCare         1997
          Princeton, New Jersey                                                Ventures L.L.C.
          Dr. John R. Evans...................        Director                 Chairman of Allelix,                  1983
          Toronto, Ontario                                                     Chairman of Torstar
                                                                               Corporation and
                                                                               Chairman of Alcan Aluminum
                                                                               Ltd.
          Dr. Irving S. Johnson...............        Director                 Biomedical Research                   1992
          Sanibel Island, Florida                                              Consultant since 1988; prior
                                                                               thereto, Vice President,
                                                                               Research, Eli Lilly & Co.
                                                                               (a pharmaceutical company)
          Edward Rygiel.......................        Director                 President and Chief Executive         1989
          Toronto, Ontario                                                     Officer, MDS Capital Corp
                                                                               (a venture capital
                                                                               corporation)
          Nelson Sims.........................        Director                 Executive Director, Alliance          1995
          Indianapolis, Indiana                                                Management, Eli Lilly and
                                                                               Co.; prior thereto,
                                                                               President, Eli Lilly Canada
                                                                               Inc.
          Dr. Calvin R. Stiller...............        Director                 Chairman and Chief Executive          1999
          Arva, Ontario                                                        Officer of Canadian Medical
                                                                               Discoveries Fund Inc. and
                                                                               Professor, Department of
</TABLE>

                                     E-66
<PAGE>

<TABLE>
          <S>                                         <C>                         <C>
                                                                                  Medicine, University of
                                                                                  Western Ontario
          Graham Strachan....................         Director                    Retired; prior thereto             1989
          Toronto, Ontario                                                        President and Chief Executive
                                                                                  Officer of Allelix
          James R. Howard-Tripp..............         Senior Vice President,      Vice President, Business           1996
          Burlington, Ontario                         Neuroscience                Development, prior thereto,
                                                                                  Vice President, Business
                                                                                  Development, Wyeth-Ayerst
          Paul J. Van Damme..................         Senior Vice President &     Vice President, Finance and        1997
          Toronto, Ontario                            Chief Financial Officer     Chief Financial Officer,
                                                                                  GlycoDesign Inc.; prior
                                                                                  thereto, Senior Vice
                                                                                  President and Chief Financial
                                                                                  Officer, TeleZone Corporation
</TABLE>

  From among its members, the board of directors appoints a number of committees
with specific duties, including an Audit Committee, a Compensation Committee and
a Corporate Governance Committee. The members of the Audit Committee are Dr.
George Connell and Edward Rygiel. The members of the Compensation Committee are
Dr. George Connell, Dr. John R. Evans, Edward Rygiel and Nelson Sims. The
members of the Corporate Governance Committee are all of the directors of
Allelix except the President and Chief Executive Officer.

Compensation of Directors

  Non-employee directors of Allelix each receive a cash payment of $10,000 and
the Chairman of Allelix receives a cash payment of $12,000 per annum for their
services as directors. The Chairman and each non-employee director are also
entitled to receive a cash payment of $1,000 per meeting and a cash payment of
$1,000 for attending a meeting of a committee of the board on a date other than
that of a board meeting. Non-employee directors of Allelix required to travel
from outside the Greater Toronto Area are entitled to receive a cash payment of
$1,000 in respect of each board or committee meeting attended. Each non-employee
director is also entitled to receive stock options to purchase 1,000 Allelix
Common Shares in respect of each board of directors meeting attended, in person
or by telephone, to a maximum of 5,000 Allelix Common Shares per annum. The
options are exercisable at the closing price per share on the TSE, as at the
date of each meeting. Effective January 1, 1998, non-employee directors are
entitled to receive their maximum annual number of options at the beginning of
the calendar year, rather than at the end. The options vest as outlined above in
respect of each meeting attended during the year. The board of directors held a
total of 14 meetings during the fiscal year ended August 31, 1999.

  Mr. William W. Crouse, a non-employee director, has elected to receive his
payments for attendance at meetings in the form of stock options in lieu of
cash. The quantity of options awarded is calculated using the Black Scholes
Option Pricing Model applying the closing price per share on the TSE as at the
date of each meeting. Mr. Crouse is entitled to receive 4,149 options in respect
of the 1999 fiscal year.

  Employee directors of Allelix receive no compensation for their services as
directors, but all directors (both non-employee and employee) are reimbursed for
their respective out-of-pocket expenses in relation to their attendance at
directors' and committee meetings.

  During fiscal 1999, 34,000 options were issued to non-employee directors and
total cash remuneration totalled $101,000.

  Mr. Digby Barrios, a non-employee director, also served as consultant to
Allelix until April 30, 1999. In this capacity Mr. Barrios received bimonthly
consulting fees of US$1,800 plus out-of-pocket expenses; during the fiscal year
ended August 31, 1999, Mr. Barrios received total payments under this
arrangement of US$9,000.

Indebtedness of Directors and Senior Officers of Allelix

  None of the directors, executive officers or senior officers of Allelix is, as
of the date hereof, in any way, directly or indirectly, indebted to Allelix by
way of a guarantee, support agreement or letter of credit or other similar
arrangement or understanding provided by Allelix.

Directors' and Officers' Liability Insurance

  Allelix maintains directors' and officers' liability insurance against claims
made in the aggregate amount of $20,000,000 per occurrence. The total deductible
per occurrence is $250,000. During the year premiums paid in respect of
directors and officers as a group for liability insurance totalled $45,000. None
of the directors or officers paid any premiums associated with such liability
insurance.

Executive Compensation

                                     E-67
<PAGE>

Report on Executive Compensation

  The Compensation Committee approves all of the policies under which
compensation is paid or awarded to Allelix's named executive officers (as
defined below). In addition, the Compensation Committee makes recommendations to
the board of directors regarding the granting of options to the named executive
officers, other employees, directors and various consultants under the Allelix
Stock Option Plan.

  Under the direction of the Compensation Committee, Allelix has implemented
compensation practices that seek to enhance the performance of Allelix and
increase its value to all shareholders.

Compensation Philosophy

  The Compensation Committee intends to continually monitor and refine the
executive compensation program of Allelix to ensure a high correlation between
level of compensation and return to shareholders, recognizing, however, that, in
a very competitive industry and difficult time, executives may be performing
well in this regard by protecting, without necessarily enhancing, shareholder
value.

  The Compensation Committee attempts to position its executive compensation
targets competitively with other companies within the
biotechnology/pharmaceutical industry using a number of different sources of
information to evaluate and establish appropriate compensation practices.

  Allelix's executive compensation program has two components -- base salary and
cash and/or stock option bonuses.

Description of Compensation Program

  Base salaries have been established at levels that the Compensation Committee
believes are sufficient to attract, motivate and retain highly qualified
executives. While aggregate base salary increases are intended to parallel
increases in the salary levels of the biotechnology/pharmaceutical industry as a
whole, individual executive salary increases will reflect the individuals level
of performance and, to a lesser extent, trends within the industry.

  Cash and/or stock option bonuses are utilized to recognize and reward
exceptional performance by executives in helping Allelix to achieve significant
strategic and operational milestones, establish strategic alliances or joint
ventures, or otherwise enhance overall Company value.

  The integrity of Allelix's executive compensation program relies on clearly
defined individual executive objectives and annual evaluation of individual
executive performance against these objectives.

Discussion of CEO Compensation

  Based on Mr. Strachan's contributions to the overall performance of Allelix
and on relative levels of compensation for chief executive officers within the
biotechnology/pharmaceutical industry, the Compensation Committee recommended
(and the board of directors approved) a continuation of Mr. Strachan's base
salary of $225,000 per annum.

  Based on the Compensation Committee's assessment of Mr. Strachan's achievement
of individual objectives in the previous year, the Compensation Committee also
recommended (and the board of directors approved) the award to Mr. Strachan of a
cash bonus of $45,000. No stock options were granted to Mr. Strachan this year.

Summary Compensation Table

  The following table sets forth the compensation awarded or paid to, or earned
by each of Allelix's five most highly compensated executive officers (referred
to collectively as the "named executive officers") during the financial years
ended August 31, 1999, 1998 and 1997.

<TABLE>
<CAPTION>

                                                                Annual Compensation
                                                     -------------------------------------------------
                                                                                    Securities Under      All Other
                                                                  Salary    Bonus        Options       Compensation(1)
          Name & Principal Function                     Year       ($)       ($)       Granted (#)           ($)
          -----------------------------              ----------  --------  -------  -----------------  ---------------
          <S>                                        <C>         <C>       <C>      <C>                <C>
          Graham Strachan(2)                           1999      225,000   45,000              --          27,000
          President & CEO                              1998      220,000   50,000          50,000          26,360
                                                       1997      206,666   50,000          10,000          13,500
          John W. Dietrich(3)                          1999      135,000   20,000              --           4,500
          Sr. VP, Research                             1998      180,000   20,000              --           6,750
          & Development                                1997      180,000   10,000          10,000           6,750
</TABLE>

                                     E-68
<PAGE>

<TABLE>
          <S>                                                <C>       <C>       <C>             <C>              <C>
          James R. Howard-Tripp                              1999      195,000   25,000          125,000          7,350
          Sr. VP, Neuroscience                               1998      168,333   40,000           50,000          6,733
                                                             1997      125,210   10,000           23,000          3,413
          W. Douglas Froom(4)                                1999      126,666   20,000               --          5,067
          Sr. VP, Protein                                    1998      161,167       --           10,000          6,447
          Therapeutics                                       1997      142,500   10,000           10,000          5,840
          Paul J. Van Damme(5)                               1999      149,167   20,000          125,000          5,967
          Sr. VP & CFO                                       1998      137,487       --           20,000          4,200
</TABLE>

(1) Allelix's contributions to pension plan accounts, including a payment of
    $13,500 to Graham Strachan in respect of past service.

(2) Graham Strachan retired as President and CEO of Allelix effective August 31,
    1999 and will, pursuant to a retirement agreement, receive $393,750 as a
    severance allowance.

(3) John W. Dietrich resigned May 31, 1999.

(4) W. Douglas Froom ceased to be Sr. VP, Protein Therapeutics on October 31,
    1998 and received severance of $101,333.

(5) Paul J. Van Damme was appointed VP Finance and CFO effective September 8,
    1997 and is now Sr. VP and CFO.

Termination of Employment, Change of Responsibility and Employment Contracts

  Allelix has not entered into formal employment agreements or contracts with
any of the named executive officers, except as above.

Long-Term Incentive Plans -- Awards in the Year Ended August 31, 1999

  Allelix has no Long-Term Incentive Plan in place at this time.

Option Grants During the Year Ended August 31, 1999

Share Option Plan

  In December, 1991, Allelix established the Allelix Stock Option Plan pursuant
to which it may grant to directors, officers, employees and consultants of
Allelix and any of its Subsidiaries non-assignable options to acquire Allelix
Common Shares in aggregate numbers not to exceed 10 percent of the aggregate
number of issued and outstanding Allelix Common Shares. In March 1994, the TSE
revised its policy governing share incentive arrangements. Effective October 11,
1995 (and subsequently ratified by the shareholders at Allelix's Annual and
Special General Meeting on February 6, 1996), the board of directors of Allelix
adopted an amendment to the Allelix Stock Option Plan to reflect the revised TSE
policy and increase Allelix's flexibility in granting compensation in the form
of share incentives. Under the Allelix Stock Option Plan, as amended, the
aggregate number of Allelix Common Shares that may be issued under the Allelix
Stock Option Plan was increased to 2,000,000 shares, provided that the number of
options outstanding at any time shall not exceed 12 percent of the then
outstanding Allelix Common Shares. In connection with the acquisition of Trophix
Pharmaceuticals Inc. during fiscal 1997, Allelix assumed existing obligations
under the stock option plan of Trophix by issuing options to purchase 380,367
Allelix Common Shares. At August 31, 1999, there were outstanding a total of
1,434,265 options to purchase Allelix Common Shares granted to directors,
officers, employees and consultants of Allelix. Excluded from the above are an
additional 265,000 options to purchase Allelix Common Shares granted in
connection with the acquisition of product licensing rights. Currently, 115,000
options are exercisable and the balance of 150,000 options are not exercisable
until future milestones are achieved.

  The purpose of the Allelix Stock Option Plan is to attract, encourage and
increase the incentive for continued service of directors, officers, employees
and consultants of Allelix and its Subsidiaries by facilitating their purchase
of equity interests in Allelix. The recipients will be entitled to receive, at
no cost to them, options to purchase Allelix Common Shares within a fixed period
of time and at a specified price per share. The Allelix Stock Option Plan is
administered by the Compensation Committee of the board of directors. Under the
Allelix Stock Option Plan, the exercise price for each stock option will be
equal to the value of the Allelix Common Shares, determined as of the date
immediately preceding the date of the grant, but in any event will not be less
than that permitted by the relevant regulatory authorities including any stock
exchanges on which the Allelix Common Shares are listed.

Bonus Plan

  In December 1991, Allelix established a bonus share plan (the "Bonus Plan")
pursuant to which it may declare bonuses payable to officers, employees and
consultants of Allelix and any Subsidiaries, and which bonuses may be payable in
Allelix Common Shares. The purpose of the Bonus Plan is to compensate the
recipients of the Allelix Common Shares for their contribution to Allelix, and
to encourage further participation and contribution to benefit Allelix. The
Bonus Plan is administered by the Compensation Committee. Allelix does not
currently intend to issue any more than 20,000 Allelix Common Shares pursuant to
the Bonus Plan in any year.

                                     E-69
<PAGE>

During the 1998 fiscal year ended August 31, 1998, 19 Allelix Common Shares were
issued under the Bonus Plan. During the 1999 fiscal year ended August 31, 1999,
328 shares were issued pursuant to the Bonus Plan. No bonus plan shares were
issued to executive officers in 1998 or 1999.

Employee Share Ownership Plan

  All employees of Allelix are eligible to participate in the Employee Share
Ownership Plan on the first enrollment date immediately following satisfactory
completion of the employee's three-month probationary period of employment. Plan
members, upon written notice to Allelix, may terminate their participation in
the plan at any time.

  Employee contributions are made through monthly payroll deductions. Each
employee determines his or her own contribution level, however it must be at
least $20 per month and may not exceed the lesser of 5% of the employee's
monthly salary or $3,500 per annum. Each month, Allelix contributes an
additional 10% of the employee's contribution towards the purchase of shares in
the open market.

  All administrative fees associated with the plan are paid by Allelix.
Brokerage fees associated with the purchase of shares are also paid by Allelix.
All fees associated with the sale of shares acquired under the plan are,
however, the responsibility of the plan member.

Option Grants in Latest Financial Year

  The following table sets forth the particulars of individual grants of options
to purchase or acquire securities of Allelix made during the fiscal year ended
August 31, 1999 to each of the named executive officers:

<TABLE>
<CAPTION>
                                                                    % of Total
                                                                 Options Granted     Exercise or Base
                                             Securities Under    to Employees in          Price
        Name and Principal Function           Options Granted      Fiscal Year       ($/Security)(3)      Expiration Date
        --------------------------------    -------------------  ----------------  --------------------  ------------------
        <S>                                 <C>                  <C>               <C>                   <C>
        James R. Howard-Tripp                      25,000(1)            4.58%             $3.20          September 29, 2008
        Sr. VP, Neuroscience                      100,000(2)           18.32%             $2.30          June 23, 2009
        Paul J. Van Damme                          25,000(1)            4.58%             $3.20          September 29, 2008
        Sr. VP & CFO                              100,000(2)           18.32%             $2.30          June 23, 2009
</TABLE>

(1) These options become exercisable 100% on the third anniversary of the date
    of grant. Options are for a term of 10 years from the date of grant.

(2) These options become exercisable as follows: 1/3 on December 31, 1999, 1/3
    on December 31, 2000 and the remaining 1/3 on December 31, 2001. Options are
    for a term of 10 years from date of grant. These options are 100%
    exercisable immediately if Allelix is a party to a reorganization, merger,
    dissolution or sale of all or substantially all of its assets.

(3) The exercise price of all options issued is equal to the closing price of
    the Allelix Common Shares on the TSE as of the date immediately preceding
    the date of the grant.

Aggregated Option Exercises in Latest Fiscal Year and Fiscal Year-End Option
Values

  The following table sets forth particulars concerning each exercise of options
during the fiscal year ended August 31, 1999, by each of the named executive
officers and the fiscal year end value of unexercised options held by each of
the named executive officers on an aggregated basis.

<TABLE>
<CAPTION>
                                                                                                           Value of Unexercised
                                           Securities      Aggregate        Unexercised Options at       In-the-Money Options at
                                          Acquired on   Value Realized        Fiscal Year-End(#)         Fiscal Year-End ($)(1)
     Name and Principal Function          Exercise (#)        ($)        Exercisable/Unexercisable(2)   Exercisable/Unexercisable
     -------------------------------      ------------  --------------   ----------------------------   -------------------------
     <S>                                                <C>              <C>                            <C>
     Graham Strachan
     President & CEO                          nil            nil                        82,600/50,000        nil/nil
     John W. Dietrich
     Sr. VP, Research &
     Development                              nil            nil                           50,000/nil        nil/nil
     W. Douglas Froom
     Sr. VP, Protein Therapeutics             nil            nil                        77,000/10,000        nil/nil
     James R. Howard-Tripp
     Sr. VP, Neuroscience                     nil            nil                       16,334/181,666        nil/$15,000
     Paul J. Van Damme
     Sr. VP & CFO                             nil            nil                       13,334/131,666        nil/$15,000
</TABLE>

(1) Value of unexercised in-the-money options calculated using the closing price
    of Allelix Common Shares on the TSE on August 31, 1999 (i.e. $2.45/share),
    less the exercise price of in-the-money stock options.

                                     E-70
<PAGE>

(2)  Allelix Common Shareholder approval is sought for the reissuance of options
     to purchase Allelix Common Shares previously granted to, among others,
     Graham Strachan, James R. Howard-Tripp and Paul J. Van Damme. If
     shareholder approval is obtained, the exerciseable/unexercisable options at
     the fiscal year end for the above officers will be as follows: Graham
     Strachan (41,301/ 25,000), James R. Howard-Tripp (8,167/153,333) and
     Paul J. Van Damme (6,667/128,333). For a discussion of the reissuance
     proposal see "Option Resolution".

Option and SAR Repricings

     On April 15, 1999 the board of directors of Allelix approved a proposal for
the reissuance of options held by Allelix employees (excluding non-executive
directors) at a reduced exercise price. Three named executive officers have
surrendered options to acquire an aggregate of 225,600 Allelix Common Shares for
cancellation (pending approval of Allelix Common Shareholders) as set forth in
the following table. For a more complete discussion of the repricing proposal
and the related Option Resolution, see "Option Resolution".

<TABLE>
<CAPTION>
                                               Securities       Market                                     Length of
                                                  Under        Price of       Exercise                      Original
                                                Options/      Securities      Price at                       Option
                                                  SARs        at Time of      Time of                         Term
                                                Repriced      Repricing      Repricing         New         Remaining
                                                   or             or             or          Exercise      at Date of
                                 Date of         Amended      Amendment      Amendment        Price        Repricing
             Name               Repricing          (#)       ($/Security)   ($/Security)   ($/Security)   or Amendment
     ----------------------   --------------   -----------   ------------   ------------   ------------   ------------
     <S>                      <C>              <C>           <C>            <C>            <C>            <C>
     Graham Strachan          April 15, 1999      32,000         $2.80         $ 6.88          $2.80      3.00 years
     President & CEO          April 15, 1999       1,268          2.80           6.50           2.80      3.58 years
                              April 15, 1999      20,000          2.80           7.50           2.80      4.58 years
                              April 15, 1999       1,000          2.80           7.00           2.80      4.83 years
                              April 15, 1999       8,334          2.80           5.63           2.80      5.75 years
                              April 15, 1999      10,000          2.80          21.70           2.80      7.00 years
                              April 15, 1999      10,000          2.80          11.00           2.80      7.83 years
                              April 15, 1999      50,000          2.80          11.20           2.80      8.42 years
     James R. Howard-Tripp    April 15, 1999      20,000          2.80          20.00           2.80      7.42 years
     Sr. VP, Neuroscience     April 15, 1999       3,000          2.80          11.00           2.80      8.00 years
                              April 15, 1999      50,000          2.80          11.20           2.80      8.42 years
     Paul J. Van Damme        April 15, 1999      20,000          2.80          11.90           2.80      8.42 years
     Sr. VP and CFO
</TABLE>

Stock Performance Graph

                                     GRAPH

Auditors, Transfer Agent and Registrar

     The auditors of Allelix are Ernst & Young LLP., Toronto. The transfer agent
and registrar for the Allelix Common Shares and the Allelix Preferred Shares is
CIBC Mellon Trust Company (Toronto).

                      COMPARISON OF SHAREHOLDERS' RIGHTS

     Allelix was incorporated under the CBCA and, accordingly, is governed by
the laws of Canada, the Allelix Articles of Incorporation and the Allelix By-
laws. NPS was reincorporated under the Delaware General Corporation Law ("DGCL")
and, accordingly, is governed by the laws of Delaware, the NPS Amended and
Restated Certificate of Incorporation and the NPS Amended and Restated By-laws.
In the event that the Transaction is consummated, Allelix Common Shareholders at
the Effective Time will have their Allelix Common Shares exchanged for NPS
Common Shares or Exchangeable Shares, and will have the right to exchange the
Exchangeable Shares for an equivalent number of NPS Common Shares.

     While the rights and privileges of shareholders of a Delaware corporation
are, in many instances, comparable to those of shareholders of a CBCA
corporation, there are certain differences. The following is a summary of the
most significant differences in shareholder rights. These differences arise from
differences between Delaware and Canadian law, between the DGCL and the CBCA and
between the Allelix Articles of Incorporation and the Allelix By-laws and the
NPS Amended and Restated Certificate of Incorporation and the NPS Amended and
Restated By-laws. This summary is not intended to be complete and is qualified
in its entirety by reference to the DGCL, the CBCA and the governing corporate
instruments of NPS and Allelix. For a description of the respective rights of
the registered holders of NPS Common Shares and Allelix Common Shares see,
respectively, "Information Concerning NPS -- Share Capital Matters" and
"Information Concerning Allelix -- Share Capital Matters".

Vote Required for Extraordinary Transactions

CBCA

                                     E-71
<PAGE>

  Under the CBCA, certain extraordinary corporate actions, such as certain
amalgamations, continuances, sales, leases or exchange of all or substantially
all of the property of a corporation other than in the ordinary course of
business, and other extraordinary corporate actions such as liquidations,
dissolutions and (if ordered by a court) arrangements, are required to be
approved by special resolution. A special resolution is a resolution passed by
not less than two-thirds of the votes cast by the shareholders entitled to vote
on the resolution. In certain cases, a special resolution to approve an
extraordinary corporate action is also required to be approved separately by the
registered holders of a class of series of shares.

  Matters such as take-over bids, issuer bids, or self-tenders, going-private
transactions and transactions with directors, officers, significant shareholders
and other related parties to which Allelix is a party will be subject to
regulation by Canadian provincial securities legislation and administrative
policies of Canadian securities administrators.

DGCL

  The DGCL requires the affirmative vote of a majority of the outstanding stock
entitled to vote thereon to authorize any merger, consolidation, dissolution or
sale of substantially all of the assets of a corporation, except that, no
authorizing stockholder vote is required of a corporation surviving a merger if
(a) such corporation's certificate of incorporation is not amended in any
respect by the merger, (b) each share of stock of such corporation outstanding
immediately prior to the effective date of the merger will be an identical
outstanding or treasury share of the surviving corporation after the effective
date of the merger and (c) the number of shares to be issued in the merger does
not exceed 20 percent of such corporation's outstanding common stock immediately
prior to the effective date of the merger. Stockholder approval is also not
required under the DGCL for mergers or consolidations in which a parent
corporation merges or consolidates with a subsidiary of which it owns at least
90 percent of the outstanding shares of each class of stock.

  Matters such as take-over bids, issuer bids, or self-tenders, going private
transactions and transactions with directors, officers, significant shareholders
officers, significant shareholders and other related parties to which NPS is a
party will be subject to regulation under United States securities laws,
regulations and policies.

Amendment to Governing Documents

CBCA

  Under the CBCA, any amendment to the articles generally requires the approval
by special resolution, which is a resolution passed by a majority of not less
than two-thirds of the votes cast by shareholders entitled to vote on the
resolution. Under the CBCA, unless the articles or by-laws otherwise provide,
the directors may, by resolution, make, amend or repeal any by-law that
regulates the business or affairs of a corporation. Where the directors make,
amend or repeal a by-law, they are required under the CBCA to submit the by-law,
amendment or repeal to the shareholders at the next meeting of shareholders, and
the shareholders may confirm, reject or amend the by-law, amendment or repeal by
an ordinary resolution, which is a resolution passed by a majority of the votes
cast by shareholders present and entitled to vote on the resolution.

DGCL

  The DGCL requires a vote of the corporation's board of directors followed by
the affirmative vote of a majority of the outstanding stock of each class
entitled to vote for any amendment to the certificate of incorporation. If an
amendment alters the powers, preferences or special rights of a particular class
or series of stock so as to affect them adversely, that class or series shall be
given the power to vote as a class notwithstanding the absence of any
specifically enumerated power in the certificate of incorporation. The DGCL also
states that the power to adopt, amend or repeal the by-laws of a corporation
shall be in the stockholders entitlement to vote, provided that the corporation
in its certificate of incorporation may confer such power on the board of
directors in addition to the stockholders. The NPS Amended and Restated
Certificate of Incorporation allocates by-law adoption and selection rights to
the directors and the stockholders.

Dissenters' Rights

CBCA

  The CBCA provides that shareholders of a CBCA corporation entitled to vote on
certain matters are entitled to exercise dissent rights and to be paid the fair
value of their shares in connection therewith. The CBCA does not distinguish for
this purpose between listed and unlisted shares. Such matters include (a) any
amalgamation with another corporation (other than with certain affiliated
corporations); (b) an amendment to the corporation's articles to add, change or
remove any provisions restricting the issue, transfer or ownership of shares;
(c) an amendment to the corporation's articles to add, change or remove any
restriction upon the business or businesses that the corporation may carry on or
upon the powers that the corporation may exercise; (d) a continuance under the
laws of another jurisdiction; (e) a sale, lease or exchange of all or
substantially all of the property of the corporation other than in the ordinary

                                     E-72
<PAGE>

course of business; (f) a court order permitting a shareholder to dissent in
connection with an application to the court for an order approving an
arrangement proposed by the corporation; or (g) certain amendments to the
articles of a corporation which require a separate class or series vote,
provided that a shareholder is not entitled to dissent if an amendment to the
articles is effected by a court order approving a reorganization or by a court
order made in connection with an action for an oppression remedy. Under the
CBCA, a shareholder may, in addition to exercising dissent rights, seek an
oppression remedy for any act or omission of a corporation which is oppressive,
unfairly prejudicial to or that unfairly disregards a shareholder's interest.

DGCL

  Under the DGCL, registered holders of shares of any class or series have the
right, in certain circumstances, to dissent from a merger or consolidation of
the corporation by demanding payment in cash for the shares equal to the fair
value (excluding any appreciation or depreciation as a consequence, or in
expectation, of the transaction) of such shares, as determined by agreement with
the corporation or by an independent appraiser appointed by a court in an action
timely brought by the corporation or the dissenters. The DGCL grants dissenters
appraisal rights only in the case of mergers or consolidations and not in the
case of a sale or transfer of assets or a purchase of assets for stock
regardless of the number of shares being issued. Further, no appraisal rights
are available for shares of any class or series listed on a national securities
exchange or designated as a national market system security on an interdealer
quotation system by NASDAQ or held of record by more than 2,000 stockholders,
unless the agreement of merger or consolidation converts such shares into
anything other than (a) stock of the surviving corporation, (b) stock of another
corporation which is either listed on a national securities exchange or
designated as a national market system security on an interdealer quotation
system by NASDAQ or held of record by more than 2,000 stockholders, (c) cash in
lieu of fractional shares, or (d) some combination of the above. In addition,
dissenter's rights are not available for any shares of the surviving corporation
if the merger did not require the vote of the stockholders of the surviving
corporation.

Oppression Remedy

CBCA

  The CBCA provides an oppression remedy that enables the court to make any
order, both interim and final, to rectify the matters complained of, if the
Director appointed under section 260 of the CBCA is satisfied upon application
by a complainant (as defined below) that: (i) any act or omission of the
corporation or an affiliate effects a result; (ii) the business or affairs of
the corporation or an affiliate are or have been carried on or conducted in a
manner; or (iii) the powers of the directors of the corporation or an affiliate
are or have been exercised in a manner; that is oppressive or unfairly
prejudicial to, or that unfairly disregards the interest of any security holder,
creditor, director or officer of the corporation. A complainant includes: (a) a
present or former registered holder or beneficial owner of securities of a
corporation or any of its affiliates; (b) a present or former officer or
director of the corporation or any of its affiliates; (c) the Director; and (d)
any other person who in the discretion of the court is a proper person to make
such application.

  Because of the breadth of the conduct which can be complained of and the scope
of the court's remedial powers, the oppression remedy is very flexible and is
frequently relied upon to safeguard the interest of shareholders and other
complainants which have a substantial interest in the corporation. Under the
CBCA, it is not necessary to prove that the directors of a corporation acted in
bad faith in order to seek an oppression remedy. Furthermore, the court may
order the corporation to pay the interim expenses of a complainant seeking an
oppression remedy, but the complainant may be held accountable for such interim
costs on final disposition of the complaint (as in the case of derivative
action).

DGCL

  The DGCL does not provide for an oppression remedy.

Derivative Actions

CBCA

  Under the CBCA, a complainant may apply to the court for leave to bring an
action in the name of and on behalf of a corporation or any subsidiary, or to
intervene in an existing action to which any such body corporate is a party, for
the purpose of prosecuting, defending or discontinuing the action on behalf of
the body corporate. Under the CBCA, no action may be brought and no intervention
in an action may be made unless the complainant has given reasonable notice to
the directors of the corporation or its subsidiary of the complainant's
intention to apply to the court and the court is satisfied that (a) the
directors of the corporation or its subsidiary will not bring, diligently
prosecute or defend or discontinue the action; (b) the complainant is acting in
good faith; and (c) it appears to be in the interests of the corporation or its
subsidiary that the action be brought, prosecuted, defended or discontinued.

  Under the CBCA, the court in a derivative action may make any order it thinks
fit including, without limitation, (i) an order authorizing the complainant or
any other person to control the conduct of the action, (ii) an order giving
directions for the conduct of

                                     E-73
<PAGE>

the action, (iii) an order directing that any amount adjudged payable by a
defendant in the action shall be paid, in whole or in part, directly to former
and present security holders of the corporation or its subsidiary instead of to
the corporation or its subsidiary, and (iv) an order requiring the corporation
or its subsidiary to pay reasonable legal fees and any other costs reasonably
incurred by the complainant in connection with the action. Additionally, under
the CBCA, a court may order a corporation or its subsidiary to pay the
complainant's interim costs, including reasonable legal fees and disbursements.
Although the complainant may be held accountable for the interim costs on final
disposition of the complainant, it is not required to give security for costs in
a derivative action.

DGCL

  Derivative actions may be brought in Delaware by a stockholder on behalf of,
and for the benefit of, the corporation. The DGCL provides that a stockholder
must aver in the complaint that he or she was a stockholder of the corporation
at the time of the transaction of which he or she complains. A stockholder may
not sue derivatively unless he or she first makes demand on the corporation that
it bring suit and such demand has been refused, unless it is shown that such
demand would have been futile.

Shareholder Consent in Lieu of Meeting

CBCA

  Under the CBCA, shareholders action without a meeting may only be taken by
written resolution signed by all shareholders who would be entitled to vote
thereon at a meeting.

DGCL

  Under the DGCL, unless otherwise provided in the certificate of incorporation,
any action required to be taken or which may be taken at an annual or special
meeting of stockholders may be taken without a meeting if a consent in writing
is signed by all the registered holders of outstanding stock having not less
than the minimum number of votes that would be necessary to authorize such
action at a meeting at which all shares entitled to vote were present and voted.
The NPS Amended and Restated Certificate of Incorporation does not contain any
special provision relating to action by written consent and the NPS Amended and
Restated By-laws specifically authorize action by written consent consistent
with the DGCL.

Director Qualifications

CBCA

  A majority of the directors of a CBCA corporation generally must be resident
Canadians but where a corporation earns in Canada directly or through its
subsidiaries less than five per cent of the gross revenues of the corporation
and all of its subsidiary bodies then not more than one-third of the directors
of the corporation are required to be resident Canadians. The CBCA also requires
that a corporation whose securities are publicly traded have not fewer than
three directors, at least two of whom are not officers or employees of the
corporation or any of its affiliates.

DGCL

  The DGCL does not have any residency requirements.

Fiduciary Duties of Directors

CBCA

  Directors of corporations incorporated or organized under the CBCA have
fiduciary obligations to the corporation and its shareholders. Pursuant to these
fiduciary obligations, the directors must act in accordance with the so-called
duties of "due care" and "loyalty".

  Pursuant to section 122 of the CBCA, the duty of loyalty requires directors of
a Canadian corporation to act honestly and in good faith with a view to the best
interests of the corporation, and the duty of care requires that the directors
exercise the care, diligence and skill that a reasonably prudent person would
exercise in comparable circumstances.

DGCL

  Under the DGCL, the duty of care requires that the directors act in an
informed and deliberative manner and to inform themselves, prior to making a
business decision, of all material information reasonably available to them. The
duty of loyalty may be summarized as the duty to act in good faith, not out of
self-interest, in a manner which the directors reasonably believe to be in the
best interests of

                                     E-74
<PAGE>

the stockholders.

Indemnification of Officers and Directors

CBCA

  Under the CBCA Allelix may, and pursuant to the Allelix By-Laws, Allelix
shall, indemnify a director or officer, a former director or officer or a person
who acts or acted at the corporation's request as a director or officer of a
body corporate of which Allelix is or was a shareholder or creditor, and his or
her heirs and legal representatives (an "Indemnifiable Person"), against all
costs, charges and expenses, including an amount paid to settle an action or
satisfy a judgment, reasonably incurred by him or her in respect of any civil,
criminal or administrative action or proceeding to which he or she is made a
party by reason of being or having been a director or officer of Allelix or such
body corporation, if: (a) he or she acted honestly and in good faith with a view
to the best interests of Allelix; and (b) in the case of a criminal or
administrative action or proceeding that is enforced by a monetary penalty, he
or she had reasonable grounds for believing that his or her conduct was lawful.
An Indemnifiable Person is entitled to such indemnity from the corporation if he
or she was substantially successful on the merits in his or her defense of the
action or proceeding and fulfilled the conditions set out in (a) and (b), above.
A corporation may, with the approval of a court, also indemnify an Indemnifiable
Person in respect of an action by or on behalf of the corporation or such body
corporate to procure a judgment in its favour, to which such person is made a
party by reason of being or having been a director or officer of the corporation
or body corporate, if he or she fulfils the conditions set out in (a) and (b),
above.

DGCL

  The DGCL provides that a corporation may indemnify its present and former
directors, officers, employees and agents (each an "indemnitee") against all
reasonable expenses (including attorneys' fees) and, except in actions initiated
by or in the right of the corporation, against all judgments, fines and amounts
paid in settlement in actions brought against them, if such indemnitee acted in
good faith and in a manner which he or she reasonably believed to be in, or not
opposed to, the best interests of the corporation, and in the case of a criminal
proceeding, had no reasonable cause to believe that his or her conduct was
unlawful. The corporation shall indemnify an indemnitee to the extent that he or
she is successful on the merits or otherwise in the defense of any claim, issue
or matter associated with an action. The NPS Amended and Restated Certificate of
Incorporation provides for indemnification of directors or officers to the
fullest extent permitted by Applicable Law.

  The DGCL allows for the advance payment of an indemnitee's expenses prior to
the final disposition of an action, provided that the indemnitee undertakes to
repay any such amount advanced if it is later determined that the indemnitee is
not entitled to indemnification with regard to the action for which such
expenses were advanced. The CBCA does not expressly provide for such advance
payment.

Director Liability

CBCA

  The CBCA does not permit any limitation of a director's liability.

DGCL

  The DGCL provides that the charter of the corporation may include a provision
which limits or eliminates the liability of directors to the corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director,
provided such liability does not arise from certain proscribed conduct,
including acts or omissions not in good faith or which involve international
misconduct or a knowing violation of law, breach of the duty of loyalty, the
payment of unlawful dividends or expenditure of funds for unlawful stock
purchases or redemptions or transactions from which such director derived an
improper personal benefit. The NPS Amended and Restated Certificate of
Incorporation provides for such provisions.

                         DISSENTING SHAREHOLDER RIGHTS

  The CBCA provides shareholders with a statutory right to dissent from certain
resolutions of a corporation which effect fundamental corporate changes.
Specifically, Allelix Shareholders may dissent from the Continuance Resolution
by exercising their right of dissent under section 190 of the CBCA. In addition,
the Interim Order expressly provides Allelix Common Shareholders the right to
dissent from the Arrangement Resolution (assuming the Continuance Resolution is
approved) pursuant to section 190 of the CBCA and the Plan of Arrangement. In
general, any Allelix Shareholder who dissents from the Continuance Resolution in
compliance with section 190 of the CBCA and the Plan of Arrangement will be
entitled, in the event the Continuance Resolution is approved and the
Continuance becomes effective, to be paid by Allelix the fair value of the
Allelix Common Shares held by such Dissenting Shareholder determined as of the
close of business on the day before the Continuance Resolution is adopted.
Likewise, any Allelix

                                     E-75
<PAGE>

Common Shareholder who dissents from the Arrangement Resolution (assuming the
Continuance Resolution is approved) in compliance with section 190 of the CBCA
will be entitled, in the event the Arrangement Resolution is approved and the
Arrangement becomes effective, to be paid by Allelix the fair value of the
Allelix Common Shares or Allelix Preferred Shares, as the case may be, held by
such Dissenting Shareholder determined as of the close of business on the day
before the Arrangement Resolution is adopted. However, any one Allelix Common
Shareholder is entitled to dissent from only one of the Continuance Resolution
or the Arrangement Resolution, not both and the holder of the Allelix Preferred
Shares may dissent from only the Continuance Resolution. The following is a
summary of the dissent provisions of the CBCA.

  The dissent provisions under the CBCA provide that a shareholder may only make
a claim thereunder with respect to all the shares of a class held by the
shareholder on behalf of any one beneficial owner and registered in the
shareholder's name. One consequence of this provision is that an Allelix
Shareholder may only exercise the right to dissent under the Dissent Procedures
in respect of Allelix Common or Allelix Preferred Shares that are registered in
that holder's name. In many cases, shares beneficially owned by a person are
registered either: (a) in the name of an intermediary that the non-registered
holder deals with in respect of the shares (such as banks, trust companies,
securities dealers and brokers, trustees or administrators of self-administered
registered retirement savings plans, registered retirement income funds,
registered educational savings plans and similar plans, and their nominees); or
(b) in the name of a clearing agency (such as CDS) of which the intermediary is
a participant. Accordingly, a non-registered holder of Allelix Common Shares
will not be entitled to exercise the right to dissent under section 190 of the
CBCA or the Plan of Arrangement (unless the Allelix Common Shares are re-
registered in the non-registered holder's name). A non-registered holder who
wishes to exercise the right to dissent should immediately contact the
intermediary with whom the non-registered holder deals in respect of his or her
Allelix Common Shares and either: (i) instruct the intermediary to exercise the
right to dissent on the non-registered holder's behalf (which, if the Allelix
Common Shares are registered in the name of CDS or other clearing agency, would
require that such shares first be re-registered in the name of the
intermediary); or (ii) instruct the intermediary to re-register the Allelix
Common Shares in the name of the non-registered holder, in which case the non-
registered holder would have to exercise the right to dissent directly.

  An Allelix Shareholder who wishes to dissent from either the Continuance
Resolution or the Arrangement Resolution must provide written notice of his, her
or its dissent ("Notice of Dissent") to Allelix by depositing such Notice of
Dissent with Allelix, or mailing it to Allelix by registered mail, at its
principal executive office at 6850 Goreway Drive, Mississauga, Ontario, L4V 1V7,
marked to the attention of the Senior Vice President, Chief Financial Officer
and Corporate Secretary of Allelix at or before the Allelix Meeting. The filing
of a Notice of Dissent does not deprive an Allelix Shareholder of the right to
vote at the Allelix Meeting; however, the CBCA provides, in effect, that an
Allelix Shareholder who has submitted a Notice of Dissent in respect of either
the Continuance Resolution or the Arrangement Resolution who then votes in
favour of such resolution will no longer be considered a Dissenting Shareholder
with respect to that class of shares voted in favour of such resolution. The
CBCA does not provide, and Allelix will not assume, that a vote against either
the Continuance Resolution or the Arrangement Resolution or an abstention
constitutes a Notice of Dissent but an Allelix Shareholder need not vote his or
her securities against such resolution in order to dissent. Similarly, the
revocation of a proxy conferring authority on the proxy holder to vote in favour
of such resolution does not constitute a Notice of Dissent; however, any proxy
granted by an Allelix Shareholder who intends to dissent, other than a proxy
that instructs the proxy holder to vote against either the Continuance
Resolution or the Arrangement Resolution, should be validly revoked (see
"General Proxy Information -- Revocation of Proxies") in order to prevent the
proxy holder from voting such securities in favour of such resolution and
thereby causing the Allelix Shareholder to forfeit his, her or its right to
dissent.

  Allelix is required, within 10 days after the Allelix Shareholders adopt the
Continuance Resolution and/or the Arrangement Resolution, to notify each of the
Dissenting Shareholders in respect of each resolution. Such notice is not
required to be sent to any Allelix Shareholder who voted in favour of the
resolution from which he, she or it submitted a Notice of Dissent nor to any
Allelix Shareholder who has withdrawn his or her Notice of Dissent.

  A Dissenting Shareholder who has not withdrawn his or her Notice of Dissent
must then, within 20 days after receipt of notice that the resolution from which
he, she or it dissented has been adopted or, if the Dissenting Shareholder does
not receive such notice, within 20 days after he or she learns that such
resolution has been adopted, send to Allelix a demand for payment ("Demand for
Payment"), containing his or her name and address, the number of Allelix Common
Shares or Allelix Preferred Shares, as applicable, in respect of which he, she
or it dissents, and a demand for payment of the fair value of such shares.
Within 30 days after sending a Demand for Payment, the Dissenting Shareholder
must send to Allelix or its transfer agent the certificates representing the
shares in respect of which he, she or it dissents. A Dissenting Shareholder who
fails to send certificates representing the shares in respect of which he, she
or it dissents forfeits his or her right to dissent. Allelix or its transfer
agent will endorse on any share certificate received from a Dissenting
Shareholder a notice that the holder is a Dissenting Shareholder and will
forthwith return the share certificates to the Dissenting Shareholder.

  After sending a Demand for Payment, a Dissenting Shareholder ceases to have
any rights as a holder of the Allelix Common Shares in respect of which the
shareholder has dissented other than the right to be paid the fair value of such
shares as determined under the Dissent Procedures, unless: (i) the Dissenting
Shareholder withdraws the Demand for Payment before Allelix makes an Offer to
Pay; (ii) Allelix fails to make a timely Offer to Pay to the Dissenting
Shareholder and the Dissenting Shareholder withdraws his or her Demand for
Payment; or (iii) the directors of Allelix revoke the Continuance Resolution
and/or the Arrangement Resolution,

                                     E-76
<PAGE>

as applicable, in all of which cases the Dissenting Shareholder's rights as a
shareholder are reinstated.

  In addition, pursuant to the Plan of Arrangement, Allelix Common Shareholders
who duly exercise such rights of dissent and who:

  (a) are ultimately determined to be entitled to be paid fair value for their
      Allelix Common Shares shall be deemed to have transferred such shares to
      NPS Allelix, to the extent the fair value therefor is paid by NPS Allelix,
      and to Allelix, to the extent the fair value therefor is paid by Allelix,
      and, in the case of Allelix Common Shares so transferred to Allelix such
      shares shall be cancelled as of the Effective Date; or

  (b) are ultimately determined not to be entitled, for any reason, to be paid
      fair value for their Allelix Common Shares shall be deemed to have
      participated in the Arrangement on the same basis as a non-dissenting
      holder of Allelix Common Shares and shall receive Exchangeable Shares or
      NPS Common Shares on the basis determined in accordance with the Plan of
      Arrangement.

  Allelix is required, not later than 7 days after the later of the Effective
Date and the date on which Allelix receives a Demand for Payment from a
Dissenting Shareholder, to send such Dissenting Shareholder an offer to pay
("Offer to Pay") for his, her or its Allelix Common Shares or Allelix Preferred
Shares, as applicable, in an amount considered by the board of directors of
Allelix to be the fair value thereof, accompanied by a statement showing the
manner in which such fair value was determined. Every Offer to Pay must be on
the same terms. Allelix must pay for the Allelix Common Shares or Allelix
Preferred Shares, as applicable, of a Dissenting Shareholder within 10 days
after an Offer to Pay has been accepted by such Dissenting Shareholder, but any
such offer lapses if Allelix does not receive an acceptance thereof within 30
days after the Offer to Pay has been made.

  If Allelix fails to make an Offer to Pay for a Dissenting Shareholder's
Allelix Common Shares or Allelix Preferred Shares, as applicable, or if a
Dissenting Shareholder fails to accept an offer which has been made, Allelix
may, within 50 days after the Effective Date or within such further period as
the Court may allow, apply to the Court to fix a fair value for the Allelix
Common Shares or Allelix Preferred Shares, as applicable, of Dissenting
Shareholders. If Allelix fails to apply to the Court, a Dissenting Shareholder
may apply to the Court for the same purpose within a further period of 20 days
or within such further period as the Court may allow. A Dissenting Shareholder
is not required to give security for costs in such an application.

  Upon an application to the Court, all Dissenting Shareholders whose Allelix
Common Shares or Allelix Preferred Shares, as applicable, have not been
purchased by Allelix will be joined as parties and bound by the decision of the
Court, and Allelix will be required to notify each affected Dissenting
Shareholder of the date, place and consequences of the application and of his or
her right to appear and be heard in person or by counsel. Upon any such
application to the Court, the Court may determine whether any person is a
Dissenting Shareholder who should be joined as a party, and the Court will then
fix a fair value for the Allelix Common Shares or Allelix Preferred Shares, as
applicable, of all Dissenting Shareholders. The final order of the Court will be
rendered against Allelix in favour of each Dissenting Shareholder and for the
amount of the fair value of his or her Allelix Common Shares or Allelix
Preferred Shares, as applicable, as fixed by the Court. The Court may, in its
discretion, allow a reasonable rate of interest on the amount payable to each
Dissenting Shareholder from the Effective Date until the date of payment. An
application by either Allelix or a Dissenting Shareholder must made to the
Court.

  The foregoing is only a summary of the Dissent Procedures under the CBCA and
under the Plan of Arrangement, which are technical and complex. A complete copy
of section 190 of the CBCA is attached to this Circular as Appendix I. It is
recommended that any Allelix Shareholder wishing to avail himself, herself or
itself of their Dissent Rights under the Dissent Procedures of the CBCA seek
legal advice as failure to comply strictly with the provisions of the CBCA and
the Plan of Arrangement may prejudice the right of dissent. For a general
summary of certain income tax implications to a Dissenting Shareholder, see
"Income Tax Considerations for Allelix Common Shareholders -- Allelix Common
Shareholders Resident in Canada -- Dissenting Shareholders".

                             AVAILABLE INFORMATION

  NPS is subject to the informational requirements of the Exchange Act and in
accordance therewith will file reports and other information with the SEC. The
reports and other information filed by NPS with the SEC can be inspected and
copied at the public reference facilities maintained by the SEC at Room 1024,
450 Fifth Street, N.W., Washington, D.C. 20549, and at the SEC's Regional
Offices at Seven World Trade Center, 13th Floor, New York, New York 10048 and at
Citicorp Center, 500 West Madison Street, Chicago, Illinois 60661-2511. Copies
of such material can also be obtained from the Public Reference section of the
SEC at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 at
prescribed rates. NPS public filings in the United States are also available to
the public from commercial document retrieval services and at the Internet World
Wide Web site maintained by the SEC at www.sec.gov. In addition, NPS Common
Stock is quoted on the NASDAQ Stock Market and reports and other information
concerning NPS may be inspected at the offices of the National Association of
Securities Dealers, Inc., 1735 K Street, N.W., Washington, D.C., 20006.

                                     E-77
<PAGE>

  Allelix is subject to the informational requirements of Canadian securities
legislation, the TSE and the ME. The former type of information can be requested
from Micromedia, 20 Victoria Street, Toronto, Ontario M5C 2N3 while the latter
type of material can be inspected at the offices of the Montreal Exchange, 800
Square Victoria, 4th Floor, Montreal, Quebec, H4Z 1A9; and the TSE, 3rd Floor, 2
First Canadian Place, 130 King Street West, Toronto, Ontario M5X 1J2. Generally,
such information is also available at the Internet site maintained by CDS Inc.
at www.sedar.com.

                                 LEGAL MATTERS

  Certain legal matters in connection with the Transaction will be passed upon
by Stikeman, Elliott, Toronto, Ontario on behalf of Allelix.

                                    EXPERTS

  The consolidated financial statements of NPS as of December 31, 1998 and
December 31, 1997 included in this Circular have been so included in reliance on
the report of KPMG, LLP, given upon the authority of said firm as experts in
accounting and auditing. The consolidated financial statements of Allelix as of
August 31, 1999 and August 31, 1998 included in this Circular have been so
included in reliance on the report of Ernst & Young LLP, given upon the
authority of said firm as experts in accounting and auditing.

          APPROVAL OF PROXY CIRCULAR BY ALLELIX'S BOARD OF DIRECTORS

  The contents of this Circular and its sending to Allelix Shareholders have
been approved by the board of directors of Allelix.

BY ORDER OF THE BOARD OF DIRECTORS

SIGNATURE

Paul J. Van Damme
Senior Vice President,
Chief Financial Officer and
Corporate Secretary

November 15, 1999
Toronto, Ontario

                                     E-78
<PAGE>

                      VOTING AND EXCHANGE TRUST AGREEMENT



          MEMORANDUM OF AGREEMENT made as of the . day of ., ..

A M O N G:

          NPS PHARMACEUTICALS, INC.,
          a corporation existing under the laws of the State of
          Delaware hereinafter referred to as "NPS"),

                                                              OF THE FIRST PART,

                                    - and -

          NPS ALLELIX INC.,
          a company limited by shares existing under the laws of
          the Province of Nova Scotia (hereinafter referred to as
          "NPS Allelix Inc."),

                                                             OF THE SECOND PART,

                                  - and -

          CIBC MELLON TRUST COMPANY
          a trust company incorporated under the laws of Canada
          (hereinafter referred to as "Trustee"),

                                                              OF THE THIRD PART.

          WHEREAS in connection with an arrangement agreement (the "Arrangement
Agreement") made as of September 27, 1999 between NPS and Allelix
Biopharmaceuticals Inc. ("Allelix"), as amended, NPS Allelix Inc. is to issue
exchangeable shares (the "Exchangeable Shares") to certain holders of securities
of Allelix pursuant to the plan of arrangement (the "Arrangement") contemplated
in the Arrangement Agreement;

          AND WHEREAS pursuant to the Arrangement Agreement, NPS and NPS Allelix
Inc. have agreed to execute a voting and exchange trust agreement substantially
in the form of this Agreement;

          NOW THEREFORE in consideration of the respective covenants and
agreements provided in this Agreement and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties hereto covenant and agree as follows:

                                      F-1
<PAGE>

                                   ARTICLE 1
                        DEFINITIONS AND INTERPRETATION

1.1       Definitions

          In this Agreement, the following terms shall have the following
meanings:

     "Affiliate" of any person means any other person directly or indirectly
     controlled by, or under control of, that person. For the purposes of this
     definition, "control" (including, with correlative meanings, the terms
     "controlled by" and "under common control of"), as applied to any person,
     means the possession by another person, directly or indirectly, of the
     power to direct or cause the direction of the management and policies of
     that first mentioned person, whether through the ownership of voting
     securities, by contract or otherwise.

     "Arrangement" means the arrangement under section 182 of the OBCA on the
     terms and subject to the conditions set out in the Plan of Arrangement,
     subject to any amendments or variations thereto made in accordance with
     Article 6 of the Plan of Arrangement or made at the direction of the Court.

     "Arrangement Agreement" means the agreement made as of September 27, 1999
     between NPS and Allelix, as amended, supplemented and/or restated in
     accordance therewith prior to the Effective Date, providing for, among
     other things, the Arrangement.

     "Authorized Investments" means securities in which, under the laws of the
     Province of Ontario, trustees are authorized to invest trust moneys,
     including short term interest bearing or discount debt obligations issued
     or guaranteed by the Government of Canada or a Province or a Canadian
     chartered bank (which may include an affiliate or related party of the
     Trustee, including without limitation Mellon Bank Canada and CIBC) provided
     that each such obligation is rated at least R1 (middle) by DBRS Inc. or an
     equivalent rating by Canadian Bond Rating Service.

     "Automatic Exchange Rights" means the benefit of the obligation of NPS to
     effect the automatic exchange of Exchangeable Shares for NPS Common Shares
     pursuant to section 5.12.

     "Beneficiaries" means the registered holders from time to time of
     Exchangeable Shares, other than NPS and its Affiliates.

     "Beneficiary Votes" has the meaning ascribed thereto in section 4.2.

     "Board of Directors" means the Board of Directors of NPS Allelix Inc..

     "Business Day" means any day on which commercial banks are generally open
     for business in Salt Lake City, Utah and Toronto, Ontario, other than a
     Saturday, a Sunday or a day observed as a holiday in Salt Lake City, Utah
     under the laws of the State of Utah or the federal laws of the United
     States of America or in Toronto, Ontario under the laws of the Province of
     Ontario or the federal laws of Canada.

     "Canadian Dollar Equivalent" means, in respect of an amount expressed in a
     currency other than Canadian dollars (the "Foreign Currency Amount") at any
     date, the product obtained by multiplying (a) the Foreign Currency Amount
     by (b) the noon spot exchange rate on such date for such foreign currency
     expressed in Canadian dollars as reported by the Bank of Canada or, in the
     event such spot exchange rate is not available, such exchange rate on such
     date for such foreign

                                      F-2
<PAGE>

     currency expressed in Canadian dollars as may be deemed by the Board of
     Directors to be appropriate for such purpose.

     "Current Market Price" means, in respect of a NPS Common Share on any date,
     the Canadian Dollar Equivalent of the average of the closing bid and asked
     prices of NPS Common Shares during a period of 20 consecutive trading days
     ending not more than three trading days before such date on Nasdaq, or, if
     the NPS Common Shares are not then quoted on Nasdaq, on such other stock
     exchange or automated quotation system on which the NPS Common Shares are
     listed or quoted, as the case may be, as may be selected by the Board of
     Directors for such purpose; provided however, that if in the opinion of the
     Board of Directors the public distribution or trading activity of NPS
     Common Shares during such period does not create a market which reflects
     the fair market value of a NPS Common Share, then the Current Market Price
     of a NPS Common Share shall be determined by the Board of Directors, in
     good faith and in its sole discretion, and provided further that any such
     selection, opinion or determination by the Board of Directors shall be
     conclusive and binding.

     "Exchange Right" has the meaning ascribed thereto in section 5.1.

     "Exchangeable Shares" means the non-voting exchangeable shares in the
     capital of NPS Allelix Inc., having substantially the rights, privileges,
     restrictions and conditions set out in Appendix 1 to the Plan of
     Arrangement.

     "Indemnified Parties" has the meaning ascribed thereto in section 9.1.

     "Insolvency Event" means the institution by NPS Allelix Inc. of any
     proceeding to be adjudicated a bankrupt or insolvent or to be wound up, or
     the consent of NPS Allelix Inc. to the institution of bankruptcy,
     insolvency or winding-up proceedings against it, or the filing of a
     petition, answer or consent seeking dissolution or winding-up under any
     bankruptcy, insolvency or analogous laws, including without limitation the
     Companies Creditors' Arrangement Act (Canada) and the Bankruptcy and
     Insolvency Act (Canada), and the failure by NPS Allelix Inc. to contest in
     good faith any such proceedings commenced in respect of NPS Allelix Inc.
     within 30 days of becoming aware thereof, or the consent by NPS Allelix
     Inc. to the filing of any such petition or to the appointment of a
     receiver, or the making by NPS Allelix Inc. of a general assignment for the
     benefit of creditors, or the admission in writing by NPS Allelix Inc. of
     its inability to pay its debts generally as they become due, or NPS Allelix
     Inc. not being permitted, pursuant to solvency requirements of applicable
     law, to redeem any Retracted Shares pursuant to section 6.6 of the Share
     Provisions.

     "Liquidation Call Right" has the meaning ascribed thereto in the Plan of
     Arrangement.

     "Liquidation Event" has the meaning ascribed thereto in section 5.12(b).

     "Liquidation Event Effective Date" has the meaning ascribed thereto in
     section 5.12(c).

     "List" has the meaning ascribed thereto in section 4.6.

     "Nasdaq" means the National Association of Securities Dealers Automated
     Quotation System;

     "NPS Affiliates" means Affiliates of NPS.

     "NPS Common Share" means a share of common stock in the capital of NPS.

                                      F-3
<PAGE>

     "NPS Consent" has the meaning ascribed thereto in section 4.2.

     "NPS Holdings" means NPS Holdings Company, an unlimited liability company
     existing under the laws of the Province of Nova Scotia and being a direct
     or indirect wholly-owned subsidiary of NPS.

     "NPS Meeting" has the meaning ascribed thereto in section 4.2.

     "NPS Special Voting Share" means the one share of Special Voting Preferred
     Stock of NPS issued in its own series which entitles the holder of record
     to a number of votes at meetings of holders of NPS Common Shares equal to
     the number of Exchangeable Shares outstanding from time to time (other than
     Exchangeable Shares held by NPS and NPS Affiliates), which share is to be
     issued to, deposited with, and voted by, the Trustee as described herein.

     "NPS Successor" has the meaning ascribed thereto in section 11.1(a).

     "OBCA" means the Business Corporations Act (Ontario), as amended.

     "Officer's Certificate" means, with respect to NPS or NPS Allelix Inc., as
     the case may be, a certificate signed by any officer or director of NPS or
     NPS Allelix Inc., as the case may be.

     "person" includes any individual, firm, partnership, joint venture, venture
     capital fund, limited liability company, unlimited liability company,
     association, trust, trustee, executor, administrator, legal personal
     representative, estate, group, body corporate, corporation, unincorporated
     association or organization, government body, syndicate or other entity,
     whether or not having legal status.

     "Plan of Arrangement" means the plan of arrangement substantially in the
     form and content of Schedule D to the Arrangement Agreement and any
     amendments or variations thereto.

     "Redemption Call Right" has the meaning ascribed thereto in the Plan of
     Arrangement.

     "Retracted Shares" has the meaning ascribed thereto in section 5.7.

     "Retraction Call Right" has the meaning ascribed thereto in the Share
     Provisions.

     "Share Provisions" means the rights, privileges, restrictions and
     conditions attaching to the Exchangeable Shares.

     "Support Agreement" means that certain support agreement made as of even
     date herewith among NPS Allelix Inc., NPS Holdings and NPS substantially in
     the form and content of Schedule B to the Arrangement Agreement, with such
     changes thereto as the parties to the Arrangement Agreement, acting
     reasonably, may agree.

     "Trust" means the trust created by this Agreement.

     "Trust Estate" means the NPS Special Voting Share, any other securities,
     the Exchange Right, the Automatic Exchange Rights and any money or other
     property which may be held by the Trustee from time to time pursuant to
     this Agreement.

     "Trustee" means CIBC Mellon Trust Company and, subject to the provisions of
     Article 10, includes any successor trustee or permitted assigns.

                                      F-4
<PAGE>

     "Voting Rights" means the voting rights attached to the NPS Special Voting
     Share.

1.2       Interpretation Not Affected by Headings, etc.

          The division of this Agreement into Articles, sections and other
portions and the insertion of headings are for convenience of reference only and
should not affect the construction or interpretation of this Agreement. Unless
otherwise indicated, all references to an "Article" or "section" followed by a
number and/or a letter refer to the specified Article or section of this
Agreement. The terms "this Agreement", "hereof", "herein" and "hereunder" and
similar expressions refer to this Agreement and not to any particular Article,
section or other portion hereof and include any agreement or instrument
supplementary or ancillary hereto.

1.3       Number, Gender, etc.

          Words importing the singular number only shall include the plural and
vice versa. Words importing any gender shall include all genders.

1.4       Date for any Action

          If any date on which any action is required to be taken under this
Agreement is not a Business Day, such action shall be required to be taken on
the next succeeding Business Day.

                                   ARTICLE 2
                             PURPOSE OF AGREEMENT

2.1       Establishment of Trust

          The purpose of this Agreement is to create the Trust for the benefit
of the Beneficiaries, as herein provided. The Trustee will hold the NPS Special
Voting Share in order to enable the Trustee to exercise the Voting Rights and
will hold the Exchange Right and the Automatic Exchange Rights in order to
enable the Trustee to exercise such rights, in each case as trustee for and on
behalf of the Beneficiaries as provided in this Agreement.

                                   ARTICLE 3
                           NPS SPECIAL VOTING SHARE

3.1       Issue and Ownership of the NPS Special Voting Share

          NPS hereby issues to and deposits with the Trustee, the NPS Special
Voting Share to be hereafter held of record by the Trustee as trustee for and on
behalf of, and for the use and benefit of, the Beneficiaries and in accordance
with the provisions of this Agreement. NPS hereby acknowledges receipt from the
Trustee as trustee for and on behalf of the Beneficiaries of good and valuable
consideration (and the adequacy thereof) for the issuance of the NPS Special
Voting Share by NPS to the Trustee. During the term of the Trust and subject to
the terms and conditions of this Agreement, the Trustee shall possess and be
vested with full legal ownership of the NPS Special Voting Share and shall be
entitled to exercise all of the rights and powers of an owner with respect to
the NPS Special Voting Share provided that the Trustee shall:

     (a)  hold the NPS Special Voting Share and the legal title thereto as
          trustee solely for the use and benefit of the Beneficiaries in
          accordance with the provisions of this Agreement; and

                                      F-5
<PAGE>

     (b)  except as specifically authorized by this Agreement, have no power or
          authority to sell, transfer, vote or otherwise deal in or with the NPS
          Special Voting Share and the NPS Special Voting Share shall not be
          used or disposed of by the Trustee for any purpose other than the
          purposes for which this Trust is created pursuant to this Agreement.

3.2       Legended Share Certificates

          NPS Allelix Inc. will cause each certificate representing Exchangeable
Shares to bear an appropriate legend notifying the Beneficiaries of their right
to instruct the Trustee with respect to the exercise of the Voting Rights in
respect of the Exchangeable Shares of the Beneficiaries.

3.3       Safe Keeping of Certificate

          The certificate representing the NPS Special Voting Share shall at all
times be held in safe keeping by the Trustee or its agent.

                                   ARTICLE 4
                           EXERCISE OF VOTING RIGHTS

4.1       Voting Rights

          The Trustee, as the holder of record of the NPS Special Voting Share,
shall be entitled to all of the Voting Rights, including the right to vote in
person or by proxy the NPS Special Voting Share on any matters, questions,
proposals or propositions whatsoever that may properly come before the
shareholders of NPS at a NPS Meeting or in connection with a NPS Consent (in
each case, as hereinafter defined).  The Voting Rights shall be and remain
vested in and exercised by the Trustee. Subject to section 7.15:

     (a)  the Trustee shall exercise the Voting Rights only on the basis of
          instructions received pursuant to this Article 4 from Beneficiaries
          entitled to instruct the Trustee as to the voting thereof at the time
          at which the NPS Meeting is held or a NPS Consent is sought; and

     (b)  to the extent that no instructions are received from a Beneficiary
          with respect to the Voting Rights to which such Beneficiary is
          entitled, the Trustee shall not exercise or permit the exercise of
          such Voting Rights.

4.2       Number of Votes

          With respect to all meetings of shareholders of NPS at which holders
of NPS Common Shares are entitled to vote (each, a "NPS Meeting") and with
respect to all written consents sought by NPS from its shareholders including
the holders of NPS Common Shares (each, a "NPS Consent"), each Beneficiary shall
be entitled to instruct the Trustee to cast and exercise one of the votes
comprised in the Voting Rights for each Exchangeable Share owned of record by
such Beneficiary on the record date established by NPS or by applicable law for
such NPS Meeting or NPS Consent, as the case may be (the "Beneficiary Votes"),
in respect of each matter, question, proposal or proposition to be voted on at
such NPS Meeting or in connection with such NPS Consent.

                                      F-6
<PAGE>

4.3       Mailings to Shareholders

          With respect to each NPS Meeting and NPS Consent, the Trustee will use
its reasonable efforts promptly to mail or cause to be mailed (or otherwise
communicate in the same manner as NPS utilizes in communications to holders of
NPS Common Shares subject to applicable regulatory requirements and provided
such manner of communications is reasonably available to the Trustee) to each of
the Beneficiaries named in the List referred to in section 4.6, such mailing or
communication to commence on the same day as the mailing or notice (or other
communication) with respect thereto is commenced by NPS to its shareholders:

     (a)  a copy of such notice, together with any related materials, including,
          without limitation, any proxy or information statement, to be provided
          to shareholders of NPS;

     (b)  a statement that such Beneficiary is entitled to instruct the Trustee
          as to the exercise of the Beneficiary Votes with respect to such NPS
          Meeting or NPS Consent or, pursuant to section 4.7, to attend such NPS
          Meeting and to exercise personally the Beneficiary Votes thereat;

     (c)  a statement as to the manner in which such instructions may be given
          to the Trustee, including an express indication that instructions may
          be given to the Trustee to give:

          (i)  a proxy to such Beneficiary or his designee to exercise
               personally the Beneficiary Votes; or

          (ii) a proxy to a designated agent or other representative of the
               management of NPS to exercise such Beneficiary Votes;

     (d)  a statement that if no such instructions are received from the
          Beneficiary, the Beneficiary Votes to which such Beneficiary is
          entitled will not be exercised;

     (e)  a form of direction whereby the Beneficiary may so direct and instruct
          the Trustee as contemplated herein; and

     (f)  a statement of the time and date by which such instructions must be
          received by the Trustee in order to be binding upon it, which in the
          case of a NPS Meeting shall not be earlier than the close of business
          on the second Business Day prior to such meeting, and of the method
          for revoking or amending such instructions.

          The materials referred to in this section 4.3 are to be provided to
the Trustee by NPS and the materials referred to in section 4.3(c), (e) and (f)
shall be subject to reasonable comment by the Trustee in a timely manner.  NPS
shall ensure that the materials to be provided to the Trustee are provided in
sufficient time to permit the Trustee to comment as aforesaid and to send all
materials to each Beneficiary at the same time as such materials are first sent
to holders of NPS Common Shares.

          For the purpose of determining Beneficiary Votes to which a
Beneficiary is entitled in respect of any NPS Meeting or NPS Consent, the number
of Exchangeable Shares owned of record by the Beneficiary shall be determined at
the close of business on the record date established by NPS or by applicable law
for purposes of determining shareholders entitled to vote at such NPS Meeting.
NPS will notify the Trustee of any decision of the Board of Directors of NPS
with respect to the calling of any NPS Meeting and shall provide all necessary
information and materials to the Trustee in each case promptly

                                      F-7
<PAGE>

and in any event in sufficient time to enable the Trustee to perform its
obligations contemplated by this section 4.3.

4.4       Copies of Shareholder Information

          NPS will deliver to the Trustee copies of all proxy materials
(including notices of NPS Meetings but excluding proxies to vote NPS Common
Shares), information statements, reports (including without limitation, all
interim and annual financial statements) and other written communications that,
in each case, are to be distributed from time to time to holders of NPS Common
Shares in sufficient quantities and in sufficient time so as to enable the
Trustee to send those materials to each Beneficiary at the same time as such
materials are first sent to holders of NPS Common Shares. The Trustee will mail
or otherwise send to each Beneficiary, at the expense of NPS, copies of all such
materials (and all materials specifically directed to the Beneficiaries or to
the Trustee for the benefit of the Beneficiaries by NPS) received by the Trustee
from NPS contemporaneously with the sending of such materials to holders of NPS
Common Shares. The Trustee will also make available for inspection by any
Beneficiary at the Trustee's principal office in Toronto all proxy materials,
information statements, reports and other written communications that are:

     (a)  received by the Trustee as the registered holder of the NPS Special
          Voting Share and made available by NPS generally to the holders of NPS
          Common Shares; or

     (b)  specifically directed to the Beneficiaries or to the Trustee for the
          benefit of the Beneficiaries by NPS.

4.5       Other Materials

          As soon as reasonably practicable after receipt by NPS or shareholders
of NPS (if such receipt is known by NPS) of any material sent or given by or on
behalf of a third party to holders of NPS Common Shares generally, including
without limitation, dissident proxy and information circulars (and related
information and material) and tender and exchange offer circulars (and related
information and material), NPS shall use its reasonable efforts to obtain and
deliver to the Trustee copies thereof in sufficient quantities so as to enable
the Trustee to forward such material (unless the same has been provided directly
to Beneficiaries by such third party) to each Beneficiary as soon as possible
thereafter.  As soon as reasonably practicable after receipt thereof, the
Trustee will mail or otherwise send to each Beneficiary, at the expense of NPS,
copies of all such materials received by the Trustee from NPS. The Trustee will
also make available for inspection by any Beneficiary at the Trustee's principal
office in Toronto copies of all such materials.

4.6       List of Persons Entitled to Vote

          NPS Allelix Inc. shall, (a) prior to each annual, general and special
NPS Meeting or the seeking of any NPS Consent and (b) forthwith upon each
request made at any time by the Trustee in writing, prepare or cause to be
prepared a list (a "List") of the names and addresses of the Beneficiaries
arranged in alphabetical order and showing the number of Exchangeable Shares
held of record by each such Beneficiary, in each case at the close of business
on the date specified by the Trustee in such request or, in the case of a List
prepared in connection with a NPS Meeting or a NPS Consent, at the close of
business on the record date established by NPS or pursuant to applicable law for
determining the holders of NPS Common Shares entitled to receive notice of
and/or to vote at such NPS Meeting or to give consent in connection with such
NPS Consent. Each such List shall be delivered to the Trustee promptly after
receipt by NPS Allelix Inc. of such request or the record date for such meeting
or seeking of consent, as the case may be, and in any event within sufficient
time as to permit the Trustee to perform its

                                      F-8
<PAGE>

obligations under this Agreement. NPS agrees to give NPS Allelix Inc. notice
(with a copy to the Trustee) of the calling of any NPS Meeting or the seeking of
any NPS Consent, together with the record dates therefor, sufficiently prior to
the date of the calling of such meeting or seeking of such consent so as to
enable NPS Allelix Inc. to perform its obligations under this section 4.6.

4.7       Entitlement to Direct Votes

          Any Beneficiary named in a List prepared in connection with any NPS
Meeting or NPS Consent will be entitled (a) to instruct the Trustee in the
manner described in section 4.3 with respect to the exercise of the Beneficiary
Votes to which such Beneficiary is entitled or (b) to attend such meeting and
personally exercise thereat, as the proxy of the Trustee, the Beneficiary Votes
to which such Beneficiary is entitled.

4.8       Voting by Trustee and Attendance of Trustee Representative at Meeting

     (a)  In connection with each NPS Meeting and NPS Consent, the Trustee shall
          exercise, either in person or by proxy, in accordance with the
          instructions received from a Beneficiary pursuant to section 4.3, the
          Beneficiary Votes as to which such Beneficiary is entitled to direct
          the vote (or any lesser number thereof as may be set forth in the
          instructions); provided, however, that such written instructions are
          received by the Trustee from the Beneficiary prior to the time and
          date fixed by the Trustee for receipt of such instruction in the
          notice given by the Trustee to the Beneficiary pursuant to section
          4.3.

     (b)  The Trustee shall cause a representative who is empowered by it to
          sign and deliver, on behalf of the Trustee, proxies for Voting Rights
          to attend each NPS Meeting. Upon submission by a Beneficiary (or its
          designee) of identification satisfactory to the Trustee's
          representative, and at the Beneficiary's request, such representative
          shall sign and deliver to such Beneficiary (or its designee) a proxy
          to exercise personally the Beneficiary Votes as to which such
          Beneficiary is otherwise entitled hereunder to direct the vote, if
          such Beneficiary either (i) has not previously given the Trustee
          instructions pursuant to section 4.3 in respect of such meeting or
          (ii) submits to such representative written revocation of any such
          previous instructions. At such meeting, the Beneficiary exercising
          such Beneficiary Votes shall have the same rights as the Trustee to
          speak at the meeting in favour of any matter, question, proposal or
          proposition, to vote by way of ballot at the meeting in respect of any
          matter, question, proposal or proposition, and to vote at such meeting
          by way of a show of hands in respect of any matter, question or
          proposition.

4.9       Distribution of Written Materials

          Any written materials distributed by the Trustee pursuant to this
Agreement shall be sent by mail (or otherwise communicated in the same manner as
NPS utilizes in communications to  holders of NPS Common Shares subject to
applicable regulatory requirements and provided such manner of communications is
reasonably available to the Trustee) to each Beneficiary at its address as shown
on the books of NPS Allelix Inc.  NPS Allelix Inc. shall provide or cause to be
provided to the Trustee for this purpose, on a timely basis and without charge
or other expense:

     (a)  a current List; and

     (b)  upon the request of the Trustee, mailing labels to enable the Trustee
          to carry out its duties under this Agreement.

                                      F-9
<PAGE>

4.10      Termination of Voting Rights

          All of the rights of a Beneficiary with respect to the Beneficiary
Votes exercisable in respect of the Exchangeable Shares held by such
Beneficiary, including the right to instruct the Trustee as to the voting of or
to vote personally such Beneficiary Votes, shall be deemed to be surrendered by
the Beneficiary to NPS or NPS Holdings, as the case may be, and such Beneficiary
Votes and the Voting Rights represented thereby shall cease immediately upon the
delivery by such holder to the Trustee of the certificates representing such
Exchangeable Shares in connection with the exercise by the Beneficiary of the
Exchange Right or the occurrence of the automatic exchange of Exchangeable
Shares for NPS Common Shares, as specified in Article 5 (unless, in either case,
NPS shall not have delivered the requisite NPS Common Shares issuable in
exchange therefor to the Trustee for delivery to the Beneficiaries), or upon the
redemption of Exchangeable Shares pursuant to Article 6 or 7 of the Share
Provisions, or upon the effective date of the liquidation, dissolution or
winding-up of NPS Allelix Inc. pursuant to Article 5 of the Share Provisions, or
upon the purchase of Exchangeable Shares from the holder thereof by NPS Holdings
pursuant to the exercise by NPS Holdings of the Retraction Call Right, the
Redemption Call Right or the Liquidation Call Right.

4.11      Communications with Shareholders

          NPS agrees not to communicate with holders of NPS Common Shares
otherwise than by mail unless such method of communication is also reasonably
available to the Trustee for communication with the Beneficiaries.

                                   ARTICLE 5
                     EXCHANGE RIGHT AND AUTOMATIC EXCHANGE

5.1       Grant and Ownership of the Exchange Right

          NPS hereby grants to the Trustee as trustee for and on behalf of, and
for the use and benefit of, the Beneficiaries the right (the "Exchange Right"),
upon the occurrence and during the continuance of an Insolvency Event, to
require NPS to purchase from each or any Beneficiary all or any part of the
Exchangeable Shares held by the Beneficiary and the Automatic Exchange Rights,
all in accordance with the provisions of this Agreement. NPS hereby acknowledges
receipt from the Trustee as trustee for and on behalf of the Beneficiaries of
good and valuable consideration (and the adequacy thereof) for the grant of the
Exchange Right and the Automatic Exchange Rights by NPS to the Trustee. During
the term of the Trust and subject to the terms and conditions of this Agreement,
the Trustee shall possess and be vested with full legal ownership of the
Exchange Right and the Automatic Exchange Rights and shall be entitled to
exercise all of the rights and powers of an owner with respect to the Exchange
Right and the Automatic Exchange Rights, provided that the Trustee shall:

     (a)  hold the Exchange Right and the Automatic Exchange Rights and the
          legal title thereto as trustee solely for the use and benefit of the
          Beneficiaries in accordance with the provisions of this Agreement; and

     (b)  except as specifically authorized by this Agreement, have no power or
          authority to exercise or otherwise deal in or with the Exchange Right
          or the Automatic Exchange Rights, and the Trustee shall not exercise
          any such rights for any purpose other than the purposes for which the
          Trust is created pursuant to this Agreement.

                                      F-10
<PAGE>

5.2       Legended Share Certificates

          NPS Allelix Inc. will cause each certificate representing Exchangeable
Shares to bear an appropriate legend notifying the Beneficiaries of:

     (a)  their right to instruct the Trustee with respect to the exercise of
          the Exchange Right in respect of the Exchangeable Shares held by a
          Beneficiary; and

     (b)  the Automatic Exchange Rights.

5.3       General Exercise of Exchange Right

          The Exchange Right shall be and remain vested in and exercisable by
the Trustee. Subject to section 7.15, the Trustee shall exercise the Exchange
Right only on the basis of instructions received pursuant to this Article 5 from
Beneficiaries entitled to instruct the Trustee as to the exercise thereof. To
the extent that no instructions are received from a Beneficiary with respect to
the Exchange Right, the Trustee shall not exercise or permit the exercise of the
Exchange Right.

5.4       Purchase Price

          The purchase price payable by NPS for each Exchangeable Share to be
purchased by NPS under the Exchange Right shall be an amount per share equal to
(a) the Current Market Price of a NPS Common Share on the last Business Day
prior to the day of closing of the purchase and sale of such Exchangeable Share
under the Exchange Right, which shall be satisfied in full by NPS causing to be
sent to such holder one NPS Common Share, plus (b) to the extent not paid by NPS
Allelix Inc. on the designated payment date therefor, an additional amount
equivalent to the full amount of all declared and unpaid dividends on each such
Exchangeable Share held by such holder on any dividend record date which
occurred prior to the closing of the purchase and sale.  In connection with each
exercise of the Exchange Right, NPS shall provide to the Trustee an Officer's
Certificate setting forth the calculation of the purchase price for each
Exchangeable Share.  The purchase price for each such Exchangeable Share so
purchased may be satisfied only by NPS issuing and delivering or causing to be
delivered to the Trustee, on behalf of the relevant Beneficiary, one NPS Common
Share and on the applicable payment date a cheque for the balance, if any, of
the purchase price without interest (but less any amounts withheld pursuant to
section 5.13).  Upon payment by NPS of such purchase price, the relevant
Beneficiary shall cease to have any right to be paid any amount in respect of
declared and unpaid dividends on each such Exchangeable Share by NPS Allelix
Inc..

5.5       Exercise Instructions

          Subject to the terms and conditions herein set forth, a Beneficiary
shall be entitled, upon the occurrence and during the continuance of an
Insolvency Event, to instruct the Trustee to exercise the Exchange Right with
respect to all or any part of the Exchangeable Shares registered in the name of
such Beneficiary on the books of NPS Allelix Inc. To cause the exercise of the
Exchange Right by the Trustee, the Beneficiary shall deliver to the Trustee, in
person or by certified or registered mail, as its principal office in Toronto or
at such other places in Canada as the Trustee may from time to time designate by
written notice to the Beneficiaries, the certificates representing the
Exchangeable Shares which such Beneficiary desires NPS to purchase, duly
endorsed in blank for transfer, and accompanied by such other documents and
instruments as may be required to effect a transfer of Exchangeable Shares under
the Companies Act (Nova Scotia) and the by-laws of NPS Allelix Inc. and such
additional documents and instruments as the Trustee, NPS Allelix Inc. and NPS
may reasonably require together with (a) a duly completed form of notice of
exercise of the Exchange Right, contained on the reverse of or attached to the

                                      F-11
<PAGE>

Exchangeable Share certificates, stating (i) that the Beneficiary thereby
instructs the Trustee to exercise the Exchange Right so as to require NPS to
purchase from the Beneficiary the number of Exchangeable Shares specified
therein, (ii) that such Beneficiary has good title to and owns all such
Exchangeable Shares to be acquired by NPS free and clear of all liens, claims
and encumbrances, (iii) the names in which the certificates representing NPS
Common Shares issuable in connection with the exercise of the Exchange Right are
to be issued and (iv) the names and addresses of the persons to whom such new
certificates should be delivered and (b) payment (or evidence satisfactory to
the Trustee, NPS Allelix Inc. and NPS of payment) of the taxes (if any) payable
as contemplated by section 5.8 of this Agreement.  If only a part of the
Exchangeable Shares represented by any certificate or certificates delivered to
the Trustee are to be purchased by NPS under the Exchange Right, a new
certificate for the balance of such Exchangeable Shares shall be issued to the
holder at the expense of NPS Allelix Inc.

5.6       Delivery of NPS Common Shares; Effect of Exercise

          Promptly after the receipt of the certificates representing the
Exchangeable Shares which the Beneficiary desires NPS to purchase under the
Exchange Right, together with such documents and instruments of transfer and a
duly completed form of notice of exercise of the Exchange Right (and payment of
taxes, if any payable as contemplated by section 5.8 or evidence thereof), duly
endorsed for transfer to NPS, the Trustee shall notify NPS and NPS Allelix Inc.
of its receipt of the same, which notice to NPS and NPS Allelix Inc. shall
constitute exercise of the Exchange Right by the Trustee on behalf of the holder
of such Exchangeable Shares, and NPS shall promptly thereafter deliver or cause
to be delivered to the Trustee, for delivery to the Beneficiary of such
Exchangeable Shares (or to such other persons, if any, properly designated by
such Beneficiary) the number of NPS Common Shares issuable in connection with
the exercise of the Exchange Right, and on the applicable payment date cheques
for the balance, if any, of the total purchase price therefor without interest
(but less any amounts withheld pursuant to section 5.13); provided, however,
that no such delivery shall be made unless and until the Beneficiary requesting
the same shall have paid (or provided evidence satisfactory to the Trustee, NPS
Allelix Inc. and NPS of the payment of) the taxes (if any) payable as
contemplated by section 5.8 of this Agreement.  Immediately upon the giving of
notice by the Trustee to NPS and NPS Allelix Inc. of the exercise of the
Exchange Right as provided in this section 5.6, the closing of the transaction
of purchase and sale contemplated by the Exchange Right shall be deemed to have
occurred and the holder of such Exchangeable Shares shall be deemed to have
transferred to NPS all of such holder's right, title and interest in and to such
Exchangeable Shares and the related interest in the Trust Estate and shall cease
to be a holder of such Exchangeable Shares and shall not be entitled to exercise
any of the rights of a holder in respect thereof, other than the right to
receive his proportionate part of the total purchase price therefor, unless the
requisite number of NPS Common Shares is not allotted, issued and delivered by
NPS to the Trustee within five Business Days of the date of the giving of such
notice by the Trustee or the balance of the purchase price, if any, is not paid
by NPS on the applicable payment date therefor, in which case the rights of the
Beneficiary shall remain unaffected until such NPS Common Shares are so
allotted, issued and delivered, and the balance of the purchase price, if any,
has been paid, by NPS.  Upon delivery by NPS to the Trustee of such NPS Common
Shares, and the balance of the purchase price, if any, the Trustee shall deliver
such NPS Common Shares to such Beneficiary (or to such other persons, if any,
properly designated by such Beneficiary).  Concurrently with such Beneficiary
ceasing to be a holder of Exchangeable Shares, the Beneficiary shall be
considered and deemed for all purposes to be the holder of the NPS Common Shares
delivered to it pursuant to the Exchange Right.

5.7       Exercise of Exchange Right Subsequent to Retraction

          In the event that a Beneficiary has exercised its right under Article
6 of the Share Provisions to require NPS Allelix Inc. to redeem any or all of
the Exchangeable Shares held by the Beneficiary (the "Retracted Shares") and is
notified by NPS Allelix Inc. pursuant to section 6.6 of the

                                      F-12
<PAGE>

Share Provisions that NPS Allelix Inc. will not be permitted as a result of
solvency requirements of applicable law to redeem all such Retracted Shares, and
provided that NPS Holdings shall not have exercised the Retraction Call Right
with respect to the Retracted Shares and that the Beneficiary has not revoked
the retraction request delivered by the Beneficiary to NPS Allelix Inc. pursuant
to section 6.1 of the Share Provisions and provided further that the Trustee has
received written notice of same from NPS Allelix Inc. or NPS, the retraction
request will constitute and will be deemed to constitute notice from the
Beneficiary to the Trustee instructing the Trustee to exercise the Exchange
Right with respect to those Retracted Shares that NPS Allelix Inc. is unable to
redeem. In any such event, NPS Allelix Inc. hereby agrees with the Trustee and
in favour of the Beneficiary promptly to forward or cause to be forwarded to the
Trustee all relevant materials delivered by the Beneficiary to NPS Allelix Inc.
or to the transfer agent of the Exchangeable Shares (including without
limitation, a copy of the retraction request delivered pursuant to section 6.1
of the Share Provisions) in connection with such proposed redemption of the
Retracted Shares and the Trustee will thereupon exercise the Exchange Right with
respect to the Retracted Shares that NPS Allelix Inc. is not permitted to redeem
and will require NPS to purchase such shares in accordance with the provisions
of this Article 5.

5.8       Stamp or Other Transfer Taxes

          Upon any sale of Exchangeable Shares to NPS pursuant to the Exchange
Right or the Automatic Exchange Rights, the share certificate or certificates
representing NPS Common Shares to be delivered in connection with the payment of
the total purchase price therefor shall be issued in the name of the Beneficiary
of the Exchangeable Shares so sold or in such names as such Beneficiary may
otherwise direct in writing without charge to the holder of the Exchangeable
Shares so sold; provided, however, that such Beneficiary (a) shall pay (and none
of NPS, NPS Allelix Inc. or the Trustee shall be required to pay) any
documentary, stamp, transfer or other taxes that may be payable in respect of
any transfer involved in the issuance or delivery of such shares to a person
other than such Beneficiary or (b) shall have evidenced to the satisfaction of
the Trustee, NPS and NPS Allelix Inc. that such taxes, if any, have been paid.

5.9       Notice of Insolvency Event

          As soon as practicable following the occurrence of an Insolvency Event
or any event that with the giving of notice or the passage of time or both would
be an Insolvency Event, NPS Allelix Inc. and NPS shall give written notice
thereof to the Trustee. As soon as practicable following the receipt of notice
from NPS Allelix Inc. and NPS of the occurrence of an Insolvency Event, or upon
the Trustee becoming aware of an Insolvency Event, the Trustee will mail to each
Beneficiary, at the expense of NPS (such funds to be received in advance), a
notice of such Insolvency Event in the form provided by NPS, which notice shall
contain a brief statement of the rights of the Beneficiaries with respect to the
Exchange Right.

5.10      Qualification of NPS Common Shares

          NPS covenants that if any NPS Common Shares to be issued and delivered
pursuant to the Exchange Right or the Automatic Exchange Rights require
registration or qualification with or approval of or the filing of any document,
including any prospectus or similar document, or the taking of any proceeding
with or the obtaining of any order, ruling or consent from any governmental or
regulatory authority under any Canadian or United States federal, provincial or
state law or regulation or pursuant to the rules and regulations of any
regulatory authority or the fulfillment of any other Canadian or United States
federal, provincial or state legal requirement before such shares may be issued
and delivered by NPS to the initial holder thereof or in order that such shares
may be freely traded thereafter (other than any restrictions of general
application on transfer by reason of a holder being a "control person" of NPS

                                      F-13
<PAGE>

for purposes of Canadian provincial securities law or an "affiliate" of NPS for
purposes of United States federal or state securities law), NPS will in good
faith expeditiously take all such actions and do all such things as are
necessary or desirable to cause such NPS Common Shares to be and remain duly
registered, qualified or approved. NPS will in good faith expeditiously take all
such actions and do all such things as are reasonably necessary or desirable to
cause all NPS Common Shares to be delivered pursuant to the Exchange Right or
the Automatic Exchange Rights to be listed, quoted or posted for trading on all
stock exchanges and quotation systems on which outstanding NPS Common Shares
have been listed by NPS and remain listed and are quoted or posted for trading
at such time.

5.11      NPS Common Shares

          NPS hereby represents, warrants and covenants that the NPS Common
Shares issuable as described herein will be duly authorized and validly issued
as fully paid and non-assessable and shall be free and clear of any lien, claim
or encumbrance.

5.12      Automatic Exchange on Liquidation of NPS

     (a)  NPS will give the Trustee written notice of each of the following
          events at the time set forth below:

          (i)  in the event of any determination by the Board of Directors of
               NPS to institute voluntary liquidation, dissolution or winding-up
               proceedings with respect to NPS or to effect any other
               distribution of assets of NPS among its shareholders for the
               purpose of winding up its affairs, at least 60 days prior to the
               proposed effective date of such liquidation, dissolution,
               winding-up or other distribution; and

          (ii) as soon as practicable following the earlier of (A) receipt by
               NPS of notice of, and (B) NPS otherwise becoming aware of, any
               threatened or instituted claim, suit, petition or other
               proceedings with respect to the involuntary liquidation,
               dissolution or winding-up of NPS or to effect any other
               distribution of assets of NPS among its shareholders for the
               purpose of winding up its affairs, in each case where NPS has
               failed to contest in good faith any such proceeding commenced in
               respect of NPS within 30 days of becoming aware thereof.

     (b)  As soon as practicable following receipt by the Trustee from NPS of
          notice of any event (a "Liquidation Event") contemplated by section
          5.12 (a) (i) or 5.12 (a) (ii) above, the Trustee will give notice
          thereof to the Beneficiaries. Such notice shall be provided to the
          Trustee by NPS and shall include a brief description of the automatic
          exchange of Exchangeable Shares for NPS Common Shares provided for in
          section 5.12(c).

     (c)  In order that the Beneficiaries will be able to participate on a pro
          rata basis with the holders of NPS Common Shares in the distribution
          of assets of NPS in connection with a Liquidation Event, on the fifth
          Business Day prior to the effective date (the "Liquidation Event
          Effective Date") of a Liquidation Event all of the then outstanding
          Exchangeable Shares shall be automatically exchanged for NPS Common
          Shares. To effect such automatic exchange, NPS shall purchase on the
          fifth Business Day prior to the Liquidation Event Effective Date each
          Exchangeable Share then outstanding and held by Beneficiaries, and
          each Beneficiary shall sell the Exchangeable Shares held by it at such
          time, for a purchase price per share equal to (a) the Current Market
          Price of a NPS Common Share on the fifth Business Day prior to the
          Liquidation Event Effective Date, which shall be satisfied in full by
          NPS issuing to the Beneficiary one NPS Common

                                      F-14
<PAGE>

          Share, and (b) to the extent not paid by NPS Allelix Inc., an
          additional amount equivalent to the full amount of all declared and
          unpaid dividends on each such Exchangeable Share held by such holder
          on any dividend record date which occurred prior to the date of the
          exchange. NPS shall provide the Trustee with an Officer's Certificate
          in connection with each automatic exchange setting forth the
          calculation of the purchase price for each Exchangeable Share.

     (d)  On the fifth Business Day prior to the Liquidation Event Effective
          Date, the closing of the transaction of purchase and sale contemplated
          by the automatic exchange of Exchangeable Shares for NPS Common Shares
          shall be deemed to have occurred, and each Beneficiary shall be deemed
          to have transferred to NPS all of the Beneficiary's right, title and
          interest in and to such Beneficiary's Exchangeable Shares and any
          right to receive declared and unpaid dividends from NPS Allelix Inc.
          and the related interest in the Trust Estate and shall cease to be a
          holder of such Exchangeable Shares and NPS shall issue to the
          Beneficiary the NPS Common Shares issuable upon the automatic exchange
          of Exchangeable Shares for NPS Common Shares and on the applicable
          payment date shall deliver to the Trustee for delivery to the
          Beneficiary a cheque for the balance, if any, of the total purchase
          price for such Exchangeable Shares without interest but less any
          amounts withheld pursuant to section 5.13. Concurrently with such
          Beneficiary ceasing to be a holder of Exchangeable Shares, the
          Beneficiary shall be considered and deemed for all purposes to be the
          holder of the NPS Common Shares issued pursuant to the automatic
          exchange of Exchangeable Shares for NPS Common Shares and the
          certificates held by the Beneficiary previously representing the
          Exchangeable Shares exchanged by the Beneficiary with NPS pursuant to
          such automatic exchange shall thereafter be deemed to represent NPS
          Common Shares issued to the Beneficiary by NPS pursuant to such
          automatic exchange. Upon the request of a Beneficiary and the
          surrender by the Beneficiary of Exchangeable Share certificates deemed
          to represent NPS Common Shares, duly endorsed in blank and accompanied
          by such instruments of transfer as NPS may reasonably require, NPS
          shall deliver or cause to be delivered to the Beneficiary certificates
          representing NPS Common Shares of which the Beneficiary is the holder.

5.13      Withholding Rights

          NPS, NPS Allelix Inc. and the Trustee shall be entitled to deduct and
withhold from any consideration otherwise payable under this Agreement to any
holder of Exchangeable Shares or NPS Common Shares such amounts as NPS, NPS
Allelix Inc. or the Trustee is required or permitted to deduct and withhold with
respect to such payment under the Income Tax Act (Canada), the United States
Internal Revenue Code of 1986 or any provision of provincial, state, local or
foreign tax law, in each case as amended or succeeded. The Trustee may act on
the advice of counsel with respect to such matters.  To the extent that amounts
are so withheld, such withheld amounts shall be treated for all purposes as
having been paid to the holder of the shares in respect of which such deduction
and withholding was made, provided that such withheld amounts are actually
remitted to the appropriate taxing authority. To the extent that the amount so
required or permitted to be deducted or withheld from any payment to a holder
exceeds the cash portion of the consideration otherwise payable to the holder,
NPS, NPS Allelix Inc. and the Trustee are hereby authorized to sell or otherwise
dispose of such portion of the consideration as is necessary to provide
sufficient funds to NPS, NPS Allelix Inc. or the Trustee, as the case may be, to
enable it to comply with such deduction or withholding requirement and NPS, NPS
Allelix Inc. or the Trustee shall notify the holder thereof and remit to such
holder any unapplied balance of the net proceeds of such sale. NPS represents
and warrants that, based upon facts currently known to it, it has no current

                                      F-15
<PAGE>

intention, as at the date of this Agreement, to deduct or withhold from any
dividend paid to holders of Exchangeable Shares any amounts under the United
States Internal Revenue Code of 1986.

                                   ARTICLE 6
               RESTRICTIONS ON ISSUE OF NPS SPECIAL VOTING STOCK

6.1       Issue of Additional Shares

          During the term of this Agreement, NPS will not, without the consent
of the holders at the relevant time of Exchangeable Shares, given in accordance
with section 10.2 of the Share Provisions, issue any shares of its Special
Voting Preferred Stock in the same series as NPS Special Voting Share.

                                   ARTICLE 7
                            CONCERNING THE TRUSTEE

7.1       Powers and Duties of the Trustee

          The rights, powers, duties and authorities of the Trustee under this
Agreement, in its capacity as Trustee of the Trust, shall include:

     (a)  receipt and deposit of the NPS Special Voting Share from NPS as
          Trustee for and on behalf of the Beneficiaries in accordance with the
          provisions of this Agreement;

     (b)  granting proxies and distributing materials to Beneficiaries as
          provided in this Agreement;

     (c)  voting the Beneficiary Votes in accordance with the provisions of this
          Agreement;

     (d)  receiving the grant of the Exchange Right and the Automatic Exchange
          Rights from NPS as Trustee for and on behalf of the Beneficiaries in
          accordance with the provisions of this Agreement;

     (e)  exercising the Exchange Right and enforcing the benefit of the
          Automatic Exchange Rights, in each case in accordance with the
          provisions of this Agreement, and in connection therewith receiving
          from Beneficiaries Exchangeable Shares and other requisite documents
          and distributing to such Beneficiaries NPS Common Shares and cheques,
          if any, to which such Beneficiaries are entitled upon the exercise of
          the Exchange Right or pursuant to the Automatic Exchange Rights, as
          the case may be;

     (f)  holding title to the Trust Estate;

     (g)  investing any moneys forming, from time to time, a part of the Trust
          Estate as provided in this Agreement;

     (h)  taking action on its own initiative or at the direction of a
          Beneficiary or Beneficiaries to enforce the obligations of NPS and NPS
          Allelix Inc. under this Agreement; and

     (i)  taking such other actions and doing such other things as are
          specifically provided in this Agreement.

          In the exercise of such rights, powers, duties and authorities the
Trustee shall have (and is granted) such incidental and additional rights,
powers, duties and authority not in conflict with any of the

                                      F-16
<PAGE>

provisions of this Agreement as the Trustee, acting in good faith and in the
reasonable exercise of its discretion, may deem necessary, appropriate or
desirable to effect the purpose of the Trust. Any exercise of such discretionary
rights, powers, duties and authorities by the Trustee shall be final, conclusive
and binding upon all persons.

          The Trustee in exercising its rights, powers, duties and authorities
hereunder shall act honestly and in good faith and with a view to the best
interests of the Beneficiaries and shall exercise the care, diligence and skill
that a reasonably prudent trustee would exercise in comparable circumstances.

          The Trustee shall not be bound to give notice or do or take any act,
action or proceeding by virtue of the powers conferred on it hereby unless and
until it shall be specifically required to do so under the terms hereof; nor
shall the Trustee be required to take any notice of, or to do, or to take any
act, action or proceeding as a result of any default or breach of any provision
hereunder, unless and until notified in writing of such default or breach, which
notices shall distinctly specify the default or breach desired to be brought to
the attention of the Trustee, and in the absence of such notice the Trustee may
for all purposes of this Agreement conclusively assume that no default or breach
has been made in the observance or performance of any of the representations,
warranties, covenants, agreements or conditions contained herein.

7.2       No Conflict of Interest

          The Trustee represents to NPS and NPS Allelix Inc. that at the date of
execution and delivery of this Agreement there exists no material conflict of
interest in the role of the Trustee as a fiduciary hereunder and the role of the
Trustee in any other capacity. The Trustee shall, within 90 days after it
becomes aware that such material conflict of interest exists, either eliminate
such material conflict of interest or resign in the manner and with the effect
specified in Article 10. If, notwithstanding the foregoing provisions of this
section 7.2, the Trustee has such a material conflict of interest, the validity
and enforceability of this Agreement shall not be affected in any manner
whatsoever by reason only of the existence of such material conflict of
interest. If the Trustee contravenes the foregoing provisions of this section
7.2, any interested party may apply to the Ontario Superior Court of Justice for
an order that the Trustee be replaced as trustee hereunder.

7.3       Dealings with Transfer Agents, Registrars, etc.

          NPS and NPS Allelix Inc. irrevocably authorize the Trustee, from time
to time, to:

     (a)  consult, communicate and otherwise deal with the respective registrars
          and transfer agents, and with any such subsequent registrar or
          transfer agent, of the Exchangeable Shares and NPS Common Shares; and

     (b)  requisition, from time to time, (i) from any such registrar or
          transfer agent any information readily available from the records
          maintained by it which the Trustee may reasonably require for the
          discharge of its duties and responsibilities under this Agreement and
          (ii) from the transfer agent of NPS Common Shares, and any subsequent
          transfer agent of such shares, the share certificates issuable upon
          the exercise from time to time of the Exchange Right and pursuant to
          the Automatic Exchange Rights.

          NPS and NPS Allelix Inc. irrevocably authorize their respective
registrars and transfer agents to comply with all such requests. NPS covenants
that it will supply its transfer agent with duly executed share certificates for
the purpose of completing the exercise from time to time of the Exchange Right
and the Automatic Exchange Rights.

                                      F-17
<PAGE>

7.4       Books and Records

          The Trustee shall keep available for inspection by NPS and NPS Allelix
Inc. at the Trustee's principal office in Toronto correct and complete books and
records of account relating to the Trust created by this Agreement, including
without limitation, all relevant data relating to mailings and instructions to
and from Beneficiaries and all transactions pursuant to the Exchange Right and
the Automatic Exchange Rights. On or before January 15, 2000, and on or before
January 15th in every year thereafter, so long as the NPS Special Voting Share
is on deposit with the Trustee, the Trustee shall transmit to NPS and NPS
Allelix Inc. a brief report, dated as of the preceding December 31st , with
respect to:

     (a)  the property and funds comprising the Trust Estate as of that date;

     (b)  the number of exercises of the Exchange Right, if any, and the
          aggregate number of Exchangeable Shares received by the Trustee on
          behalf of Beneficiaries in consideration of the issuance by NPS of NPS
          Common Shares in connection with the Exchange Right, during the
          calendar year ended on such December 31st; and

     (c)  any action taken by the Trustee in the performance of its duties under
          this Agreement which it had not previously reported and which, in the
          Trustee's opinion, materially affects the Trust Estate.

7.5       Income Tax Returns and Reports

          The Trustee shall, to the extent necessary, prepare and file on behalf
of the Trust appropriate United States and Canadian income tax returns and any
other returns or reports as may be required by applicable law or pursuant to the
rules and regulations of any securities exchange or other trading system through
which the Exchangeable Shares are traded. In connection therewith, the Trustee
may obtain the advice and assistance of such experts or advisors as the Trustee
considers necessary or advisable (who may be experts or advisors to NPS or NPS
Allelix Inc.). If requested by the Trustee, NPS or NPS Allelix Inc. shall retain
qualified experts or advisors for the purpose of providing such tax advice or
assistance.

7.6       Indemnification Prior to Certain Actions by Trustee

          The Trustee shall exercise any or all of the rights, duties, powers or
authorities vested in it by this Agreement at the request, order or direction of
any Beneficiary upon such Beneficiary furnishing to the Trustee reasonable
funding, security or indemnity against the costs, expenses and liabilities which
may be incurred by the Trustee therein or thereby, provided that no Beneficiary
shall be obligated to furnish to the Trustee any such security or indemnity in
connection with the exercise by the Trustee of any of its rights, duties, powers
and authorities with respect to the NPS Special Voting Share pursuant to Article
4, subject to section 7.15, and with respect to the Exchange Right pursuant to
Article 5, subject to section 7.15, and with respect to the Automatic Exchange
Rights pursuant to Article 5.

          None of the provisions contained in this Agreement shall require the
Trustee to expend or risk its own funds or otherwise incur financial liability
in the exercise of any of its rights, powers, duties, or authorities unless
funded, given security and indemnified as aforesaid.

                                      F-18
<PAGE>

7.7       Action of Beneficiaries

          No Beneficiary shall have the right to institute any action, suit or
proceeding or to exercise any other remedy authorized by this Agreement for the
purpose of enforcing any of its rights or for the execution of any trust or
power hereunder unless the Beneficiary has requested the Trustee to take or
institute such action, suit or proceeding and furnished the Trustee with the
funding, security or indemnity referred to in section 7.6 and the Trustee shall
have failed to act within a reasonable time thereafter. In such case, but not
otherwise, the Beneficiary shall be entitled to take proceedings in any court of
competent jurisdiction such as the Trustee might have taken; it being understood
and intended that no one or more Beneficiaries shall have any right in any
manner whatsoever to affect, disturb or prejudice the rights hereby created by
any such action, or to enforce any right hereunder or the Voting Rights, the
Exchange Rights or the Automatic Exchange Rights except subject to the
conditions and in the manner herein provided, and that all powers and trusts
hereunder shall be exercised and all proceedings at law shall be instituted, had
and maintained by the Trustee, except only as herein provided, and in any event
for the equal benefit of all Beneficiaries.

7.8       Reliance Upon Declarations

          The Trustee shall not be considered to be in contravention of any of
its rights, powers, duties and authorities hereunder if, when required, it acts
and relies in good faith upon statutory declarations, certificates, opinions or
reports furnished pursuant to the provisions hereof or required by the Trustee
to be furnished to it in the exercise of its rights, powers, duties and
authorities hereunder if such statutory declarations, certificates, opinions or
reports comply with the provisions of section 7.9, if applicable, and with any
other applicable provisions of this Agreement.

7.9       Evidence and Authority to Trustee

          NPS and/or NPS Allelix Inc. shall furnish to the Trustee evidence of
compliance with the conditions provided for in this Agreement relating to any
action or step required or permitted to be taken by NPS and/or NPS Allelix Inc.
or the Trustee under this Agreement or as a result of any obligation imposed
under this Agreement, including, without limitation, in respect of the Voting
Rights or the Exchange Right or the Automatic Exchange Rights and the taking of
any other action to be taken by the Trustee at the request of or on the
application of NPS and/or NPS Allelix Inc. promptly if and when:

     (a)  such evidence is required by any other section of this Agreement to be
          furnished to the Trustee in accordance with the terms of this section
          7.9; or

     (b)  the Trustee, in the exercise of its rights, powers, duties and
          authorities under this Agreement, gives NPS and/or NPS Allelix Inc.
          written notice requiring it to furnish such evidence in relation to
          any particular action or obligation specified in such notice.

          Such evidence shall consist of an Officer's Certificate of NPS and/or
NPS Allelix Inc. or a statutory declaration or a certificate made by persons
entitled to sign an Officer's Certificate stating that any such condition has
been complied with in accordance with the terms of this Agreement.

          Whenever such evidence relates to a matter other than the Voting
Rights or the Exchange Right or the Automatic Exchange Rights or the taking of
any other action to be taken by the Trustee at the request or on the application
of NPS and/or NPS Allelix Inc., and except as otherwise specifically provided
herein, such evidence may consist of a report or opinion of any solicitor,
attorney, auditor, accountant, appraiser, valuer, engineer or other expert or
any other person whose qualifications give authority to a statement made by him,
provided that if such report or opinion is furnished by a director,

                                      F-19
<PAGE>

officer or employee of NPS and/or NPS Allelix Inc. it shall be in the form of an
Officer's Certificate or a statutory declaration.

          Each statutory declaration, Officer's Certificate, opinion or report
furnished to the Trustee as evidence of compliance with a condition provided for
in this Agreement shall include a statement by the person giving the evidence:

     (c)  declaring that he has read and understands the provisions of this
          Agreement relating to the condition in question;

     (d)  describing the nature and scope of the examination or investigation
          upon which he based the statutory declaration, certificate, statement
          or opinion; and

     (e)  declaring that he has made such examination or investigation as he
          believes is necessary to enable him to make the statements or give the
          opinions contained or expressed therein.

7.10      Experts, Advisers and Agents

          The Trustee may:

     (a)  in relation to these presents act and rely on the opinion or advice of
          or information obtained from any solicitor, attorney, auditor,
          accountant, appraiser, valuer, engineer or other expert, whether
          retained by the Trustee or by NPS and/or NPS Allelix Inc. or
          otherwise, and may retain or employ such assistants as may be
          necessary to the proper discharge of its powers and duties and
          determination of its rights hereunder and may pay proper and
          reasonable compensation for all such legal and other advice or
          assistance as aforesaid; and

     (b)  employ such agents and other assistants as it may reasonably require
          for the proper determination and discharge of its powers and duties
          hereunder, and may pay reasonable remuneration for all services
          performed for it (and shall be entitled to receive reasonable
          remuneration for all services performed by it) in the discharge of the
          trusts hereof and compensation for all disbursements, costs and
          expenses made or incurred by it in the discharge of its duties
          hereunder and in the management of the Trust.

7.11      Investment of Moneys Held by Trustee

          Unless otherwise provided in this Agreement, any moneys held by or on
behalf of the Trustee which under the terms of this Agreement may or ought to be
invested or which may be on deposit with the Trustee or which may be in the
hands of the Trustee may be invested and reinvested in the name or under the
control of the Trustee, in trust for NPS Allelix Inc., in Authorized
Investments, provided that such securities are stated to mature within two years
after their purchase by the Trustee, and the Trustee shall so invest such moneys
on the written direction of NPS Allelix Inc.. Pending the investment of any
moneys as hereinbefore provided, such moneys may be deposited in the name of the
Trustee in any chartered bank in Canada or, with the consent of NPS Allelix
Inc., in the deposit department of the Trustee or any other loan or trust
company authorized to accept deposits under the laws of Canada or any province
thereof at the rate of interest then current on similar deposits.

          Unless herein otherwise expressly provided, any of the funds held by
the Trustee may be deposited in a trust account in the name of the Trustee
(which may be held with the Trustee or an affiliate or related party to the
Trustee), which account shall be non-interest bearing. Upon the written
direction of

                                      F-20
<PAGE>

NPS Allelix Inc., the Trustee shall invest in its name such funds in Authorized
Investments in accordance with such direction. Any direction by NPS Allelix Inc.
to the Trustee as to the investment of the funds shall be in writing and shall
be provided to the Trustee no later than 9:00 a.m. on the day on which the
investment is to be made. Any such direction received by the Trustee after 9:00
a.m. or received on a non-Business Day, shall be deemed to have been given prior
to 9:00 a.m. the next Business Day.

7.12      Trustee Not Required to Give Security

          The Trustee shall not be required to give any bond or security in
respect of the execution of the trusts, rights, duties, powers and authorities
of this Agreement or otherwise in respect of the premises.

7.13      Trustee Not Bound to Act on Request

          Except as in this Agreement otherwise specifically provided, the
Trustee shall not be bound to act in accordance with any direction or request of
NPS and/or NPS Allelix Inc. or of the directors thereof until a duly
authenticated copy of the instrument or resolution containing such direction or
request shall have been delivered to the Trustee, and the Trustee shall be
empowered to act upon any such copy purporting to be authenticated and believed
by the Trustee to be genuine.

7.14      Authority to Carry on Business

          The Trustee represents to NPS and NPS Allelix Inc. that at the date of
execution and delivery by it of this Agreement it is authorized to carry on the
business of a trust company in each of the Provinces of Canada but if,
notwithstanding the provisions of this section 7.14, it ceases to be so
authorized to carry on business, the validity and enforceability of this
Agreement and the Voting Rights, the Exchange Right and the Automatic Exchange
Rights shall not be affected in any manner whatsoever by reason only of such
event but the Trustee shall, within 90 days after ceasing to be authorized to
carry on the business of a trust company in any Province of Canada, either
become so authorized or resign in the manner and with the effect specified in
Article 10.

7.15      Conflicting Claims

          If conflicting claims or demands are made or asserted with respect to
any interest of any Beneficiary in any Exchangeable Shares, including any
disagreement between the heirs, representatives, successors or assigns
succeeding to all or any part of the interest of any Beneficiary in any
Exchangeable Shares, resulting in conflicting claims or demands being made in
connection with such interest, then the Trustee shall be entitled, at its sole
discretion, to refuse to recognize or to comply with any such claims or demands.
In so refusing, the Trustee may elect not to exercise any Voting Rights,
Exchange Rights or Automatic Exchange Rights subject to such conflicting claims
or demands and, in so doing, the Trustee shall not be or become liable to any
person on account of such election or its failure or refusal to comply with any
such conflicting claims or demands. The Trustee shall be entitled to continue to
refrain from acting and to refuse to act until:

     (a)  the rights of all adverse claimants with respect to the Voting Rights,
          Exchange Right or Automatic Exchange Rights subject to such
          conflicting claims or demands have been adjudicated by a final
          judgment of a court of competent jurisdiction; or

     (b)  all differences with respect to the Voting Rights, Exchange Right or
          Automatic Exchange Rights subject to such conflicting claims or
          demands have been conclusively settled by a valid written agreement
          binding on all such adverse claimants, and the Trustee shall have

                                      F-21
<PAGE>

          been furnished with an executed copy of such agreement certified to be
          in full force and effect.

          If the Trustee elects to recognize any claim or comply with any demand
made by any such adverse claimant, it may in its discretion require such
claimant to furnish such surety bond or other security satisfactory to the
Trustee as it shall deem appropriate to fully indemnify it as between all
conflicting claims or demands.

7.16      Acceptance of Trust

          The Trustee hereby accepts the Trust created and provided for by and
in this Agreement and agrees to perform the same upon the terms and conditions
herein set forth and to hold all rights, privileges and benefits conferred
hereby and by law in trust for the various persons who shall from time to time
be Beneficiaries, subject to all the terms and conditions herein set forth.

                                   ARTICLE 8
                                 COMPENSATION

8.1       Fees and Expenses of the Trustee

          NPS and NPS Allelix Inc. jointly and severally agree to pay the
Trustee reasonable compensation for all of the services rendered by it under
this Agreement and will reimburse the Trustee for all reasonable expenses
(including, but not limited to, taxes other than taxes based on the net income
of the Trustee, fees paid to legal counsel and other experts and advisors and
travel expenses) and disbursements, including the cost and expense of any suit
or litigation of any character and any proceedings before any governmental
agency reasonably incurred by the Trustee in connection with its duties under
this Agreement; provided that NPS and NPS Allelix Inc. shall have no obligation
to reimburse the Trustee for any expenses or disbursements paid, incurred or
suffered by the Trustee in any suit or litigation in which the Trustee is
determined to have acted in bad faith or with negligence, recklessness or wilful
misconduct.

                                   ARTICLE 9
                  INDEMNIFICATION AND LIMITATION OF LIABILITY

9.1       Indemnification of the Trustee

          NPS and NPS Allelix Inc. jointly and severally agree to indemnify and
hold harmless the Trustee and each of its directors, officers, employees and
agents appointed and acting in accordance with this Agreement (collectively, the
"Indemnified Parties") against all claims, losses, damages, reasonable costs,
penalties, fines and reasonable expenses (including reasonable expenses of the
Trustee's legal counsel) which, without fraud, negligence, recklessness, wilful
misconduct or bad faith on the part of such Indemnified Party, may be paid,
incurred or suffered by the Indemnified Party by reason or as a result of the
Trustee's acceptance or administration of the Trust, its compliance with its
duties set forth in this Agreement, or any written or oral instruction delivered
to the Trustee by NPS or NPS Allelix Inc. pursuant hereto.

          In no case shall NPS or NPS Allelix Inc. be liable under this
indemnity for any claim against any of the Indemnified Parties unless NPS and
NPS Allelix Inc. shall be notified by the Trustee of the written assertion of a
claim or of any action commenced against the Indemnified Parties, promptly after
any of the Indemnified Parties shall have received any such written assertion of
a claim or shall have been served with a summons or other first legal process
giving information as to the nature and basis of

                                      F-22
<PAGE>

the claim. Subject to (ii) below, NPS and NPS Allelix Inc. shall be entitled to
participate at their own expense in the defence and, if NPS and NPS Allelix Inc.
so elect at any time after receipt of such notice, either of them may assume the
defence of any suit brought to enforce any such claim. The Trustee shall have
the right to employ separate counsel in any such suit and participate in the
defence thereof, but the fees and expenses of such counsel shall be at the
expense of the Trustee unless: (i) the employment of such counsel has been
authorized by NPS or NPS Allelix Inc.; or (ii) the named parties to any such
suit include both the Trustee and NPS or NPS Allelix Inc. and the Trustee shall
have been advised by counsel acceptable to NPS or NPS Allelix Inc. that there
may be one or more legal defences available to the Trustee that are different
from or in addition to those available to NPS or NPS Allelix Inc. and that, in
the judgment of such counsel, would present a conflict of interest were a joint
representation to be undertaken (in which case NPS and NPS Allelix Inc. shall
not have the right to assume the defence of such suit on behalf of the Trustee
but shall be liable to pay the reasonable fees and expenses of counsel for the
Trustee). This indemnity shall survive the termination of this Agreement and the
resignation or removal of the Trustee.

9.2       Limitation of Liability

          The Trustee shall not be held liable for any loss which may occur by
reason of depreciation of the value of any part of the Trust Estate or any loss
incurred on any investment of funds pursuant to this Agreement, except to the
extent that such loss is attributable to the fraud, negligence, recklessness,
wilful misconduct or bad faith on the part of the Trustee.

                                  ARTICLE 10
                               CHANGE OF TRUSTEE

10.1      Resignation

          The Trustee, or any trustee hereafter appointed, may at any time
resign by giving written notice of such resignation to NPS and NPS Allelix Inc.
specifying the date on which it desires to resign, provided that such notice
shall not be given less than thirty (30) days before such desired resignation
date unless NPS and NPS Allelix Inc. otherwise agree and provided further that
such resignation shall not take effect until the date of the appointment of a
successor trustee and the acceptance of such appointment by the successor
trustee. Upon receiving such notice of resignation, NPS and NPS Allelix Inc.
shall promptly appoint a successor trustee, which shall be a corporation
organized and existing under the laws of Canada and authorized to carry on the
business of a trust company in all provinces of Canada, by written instrument in
duplicate, one copy of which shall be delivered to the resigning trustee and one
copy to the successor trustee. Failing the appointment and acceptance of a
successor trustee, a successor trustee may be appointed by order of a court of
competent jurisdiction upon application of one or more of the parties to this
Agreement. If the retiring trustee is the party initiating an application for
the appointment of a successor trustee by order of a court of competent
jurisdiction, NPS and NPS Allelix Inc. shall be jointly and severally liable to
reimburse the retiring trustee for its legal costs and expenses in connection
with same.

10.2      Removal

          The Trustee, or any trustee hereafter appointed, may (provided a
successor trustee is appointed) be removed at any time on not less than 30 days'
prior notice by written instrument executed by NPS and NPS Allelix Inc., in
duplicate, one copy of which shall be delivered to the trustee so removed and
one copy to the successor trustee.

                                      F-23
<PAGE>

10.3      Successor Trustee

          Any successor trustee appointed as provided under this Agreement shall
execute, acknowledge and deliver to NPS and NPS Allelix Inc. and to its
predecessor trustee an instrument accepting such appointment. Thereupon the
resignation or removal of the predecessor trustee shall become effective and
such successor trustee, without any further act, deed or conveyance, shall
become vested with all the rights, powers, duties and obligations of its
predecessor under this Agreement, with the like effect as if originally named as
trustee in this Agreement. However, on the written request of NPS and NPS
Allelix Inc. or of the successor trustee, the trustee ceasing to act shall, upon
payment of any amounts then due it pursuant to the provisions of this Agreement,
execute and deliver an instrument transferring to such successor trustee all the
rights and powers of the trustee so ceasing to act. Upon the request of any such
successor trustee, NPS, NPS Allelix Inc. and such predecessor trustee shall
execute any and all instruments in writing for more fully and certainly vesting
in and confirming to such successor trustee all such rights and powers.

10.4      Notice of Successor Trustee

          Upon acceptance of appointment by a successor trustee as provided
herein, NPS and NPS Allelix Inc. shall cause to be mailed notice of the
succession of such trustee hereunder to each Beneficiary specified in a List. If
NPS or NPS Allelix Inc. shall fail to cause such notice to be mailed within 10
days after acceptance of appointment by the successor trustee, the successor
trustee shall cause such notice to be mailed at the expense of NPS and NPS
Allelix Inc..

                                  ARTICLE 11
                                NPS SUCCESSORS

11.1      Certain Requirements in Respect of Combination, etc.

          NPS shall not consummate any transaction (whether by way of
reconstruction, reorganization, consolidation, merger, transfer, sale, lease or
otherwise) whereby all or substantially all of its undertaking, property and
assets would become the property of any other person or, in the case of a
merger, of the continuing corporation resulting therefrom unless, but may do so
if:

     (a)  such other person or continuing corporation (herein called the "NPS
          Successor"), by operation of law, becomes, without more, bound by the
          terms and provisions of this Agreement or, if not so bound, executes,
          prior to or contemporaneously with the consummation of such
          transaction, a trust agreement supplemental hereto and such other
          instruments (if any) as are satisfactory to the Trustee, acting
          reasonably, and in the opinion of legal counsel to the Trustee are
          reasonably necessary or advisable to evidence the assumption by the
          NPS Successor of liability for all moneys payable and property
          deliverable hereunder and the covenant of such NPS Successor to pay
          and deliver or cause to be delivered the same and its agreement to
          observe and perform all the covenants and obligations of NPS under
          this Agreement; and

     (b)  such transaction shall, to the satisfaction of the Trustee, acting
          reasonably, and in the opinion of legal counsel to the Trustee, be
          upon such terms and conditions as substantially to preserve and not to
          impair in any material respect any of the rights, duties, powers and
          authorities of the Trustee or of the Beneficiaries hereunder.

                                      F-24
<PAGE>

11.2      Vesting of Powers in Successor

          Whenever the conditions of section 11.1 have been duly observed and
performed, the Trustee, NPS Successor and NPS Allelix Inc. shall, if required by
section 11.1, execute and deliver the supplemental trust agreement provided for
in Article 12 and thereupon NPS Successor shall possess and from time to time
may exercise each and every right and power of NPS under this Agreement in the
name of NPS or otherwise and any act or proceeding by any provision of this
Agreement required to be done or performed by the Board of Directors of NPS or
any officers of NPS may be done and performed with like force and effect by the
directors or officers of such NPS Successor.

11.3      Wholly-Owned Subsidiaries

          Subject to section 4.12 of the Arrangement Agreement, nothing herein
shall be construed as preventing the amalgamation or merger of any wholly-owned
direct or indirect subsidiary of NPS with or into NPS or the winding-up,
liquidation or dissolution of any wholly-owned subsidiary of NPS provided that
all of the assets of such subsidiary are transferred to NPS or another wholly-
owned direct or indirect subsidiary of NPS and any such transactions are
expressly permitted by this Article 11.

                                  ARTICLE 12
                 AMENDMENTS AND SUPPLEMENTAL TRUST AGREEMENTS

12.1      Amendments, Modifications, etc.

          This Agreement may not be amended or modified except by an agreement
in writing executed by NPS, NPS Allelix Inc. and the Trustee and approved by the
Beneficiaries in accordance with section 10.2 of the Share Provisions.

12.2      Ministerial Amendments

          Notwithstanding the provisions of section 12.1, the parties to this
Agreement may in writing, at any time and from time to time, without the
approval of the Beneficiaries, amend or modify this Agreement for the purposes
of:

     (a)  adding to the covenants of any or all parties hereto for the
          protection of the Beneficiaries hereunder provided that the Board of
          Directors of each of NPS Allelix Inc. and NPS shall be of the good
          faith opinion that such additions will not be prejudicial to the
          rights or interests of the Beneficiaries;

     (b)  making such amendments or modifications not inconsistent with this
          Agreement as may be necessary or desirable with respect to matters or
          questions which, in the good faith opinion of the Board of Directors
          of each of NPS and NPS Allelix Inc. and in the opinion of the Trustee,
          having in mind the best interests of the Beneficiaries it may be
          expedient to make, provided that such Boards of Directors and the
          Trustee, acting on the advice of counsel, shall be of the opinion that
          such amendments and modifications will not be prejudicial to the
          interests of the Beneficiaries; or

     (c)  making such changes or corrections which, on the advice of counsel to
          NPS, NPS Allelix Inc. and the Trustee, are required for the purpose of
          curing or correcting any ambiguity or defect or inconsistent provision
          or clerical omission or mistake or manifest error, provided that the
          Trustee, acting on the advice of counsel, and the Board of Directors
          of

                                      F-25
<PAGE>

          each of NPS and NPS Allelix Inc. shall be of the opinion that such
          changes or corrections will not be prejudicial to the rights and
          interests of the Beneficiaries.

12.3      Meeting to Consider Amendments

          NPS Allelix Inc., at the request of NPS, shall call a meeting or
meetings of the Beneficiaries for the purpose of considering any proposed
amendment or modification requiring approval pursuant hereto. Any such meeting
or meetings shall be called and held in accordance with the by-laws of NPS
Allelix Inc., the Share Provisions and all applicable laws.

12.4      Changes in Capital of NPS and NPS Allelix Inc.

          At all times after the occurrence of any event contemplated pursuant
to section 2.7 or 2.8 of the Support Agreement or otherwise, as a result of
which either NPS Common Shares or the Exchangeable Shares or both are in any way
changed, this Agreement shall forthwith be amended and modified as necessary in
order that it shall apply with full force and effect, mutatis mutandis, to all
new securities into which NPS Common Shares or the Exchangeable Shares or both
are so changed and the parties hereto shall execute and deliver a supplemental
trust agreement giving effect to and evidencing such necessary amendments and
modifications.

12.5      Execution of Supplemental Trust Agreements

          No amendment to or modification or waiver of any of the provisions of
this Agreement otherwise permitted hereunder shall be effective unless made in
writing and signed by all of the parties hereto. From time to time NPS Allelix
Inc. (when authorized by a resolution of its Board of Directors), NPS (when
authorized by a resolution of its Board of Directors) and the Trustee may,
subject to the provisions of these presents, and they shall, when so directed by
these presents, execute and deliver by their proper officers, trust agreements
or other instruments supplemental hereto, which thereafter shall form part
hereof, for any one or more of the following purposes:

     (a)  evidencing the succession of NPS Successors and the covenants of and
          obligations assumed by each such NPS Successor in accordance with the
          provisions of Article 11 and the successors of any successor trustee
          in accordance with the provisions of Article 10;

     (b)  making any additions to, deletions from or alterations of the
          provisions of this Agreement or the Voting Rights, the Exchange Right
          or the Automatic Exchange Rights which, in the opinion of the Trustee,
          will not be prejudicial to the interests of the Beneficiaries or are,
          in the opinion of counsel to the Trustee, necessary or advisable in
          order to incorporate, reflect or comply with any legislation the
          provisions of which apply to NPS, NPS Allelix Inc., the Trustee or
          this Agreement; and

     (c)  for any other purposes not inconsistent with the provisions of this
          Agreement, including without limitation, to make or evidence any
          amendment or modification to this Agreement as contemplated hereby,
          provided that, in the opinion of the Trustee, the rights of the
          Trustee and Beneficiaries will not be prejudiced thereby.

                                      F-26
<PAGE>

                                  ARTICLE 13
                                  TERMINATION

13.1      Term

          The Trust created by this Agreement shall continue until the earliest
to occur of the following events:

     (a)  no outstanding Exchangeable Shares are held by a Beneficiary;

     (b)  each of NPS and NPS Allelix Inc. elects in writing to terminate the
          Trust and such termination is approved by the Beneficiaries in
          accordance with section 10.2 of the Share Provisions; and

     (c)  21 years after the death of the last survivor of the descendants of
          His Majesty King George VI of Canada and the United Kingdom of Great
          Britain and Northern Ireland living on the date of the creation of the
          Trust.

13.2      Survival of Agreement

          This Agreement shall survive any termination of the Trust and shall
continue until there are no Exchangeable Shares outstanding held by a
Beneficiary; provided, however, that the provisions of Articles 8 and 9 shall
survive any such termination of this Agreement.

                                  ARTICLE 14
                                    GENERAL

14.1      Severability

          If any provision of this Agreement is held to be invalid, illegal or
unenforceable, the validity, legality or enforceability of the remainder of this
Agreement shall not in any way be affected or impaired thereby and the agreement
shall be carried out as nearly as possible in accordance with its original terms
and conditions.

14.2      Enurement

          This Agreement shall be binding upon and enure to the benefit of the
parties hereto and their respective successors and permitted assigns and to the
benefit of the Beneficiaries.

14.3      Notices to Parties

          All notices and other communications between the parties hereunder
shall be in writing and shall be deemed to have been given if delivered
personally or by confirmed telecopy to the parties at the following addresses
(or at such other address for such party as shall be specified in like notice):

                                      F-27
<PAGE>

     (a)  if to NPS or NPS Allelix Inc., at:

          NPS Pharmaceuticals, Inc.
          420 Chipeta Way
          Salt Lake City, Utah 84108

          Attention:       Hunter Jackson
          Telecopier No.:  801-583-4961

          if to the Trustee, at:

          CIBC Mellon Trust Company
          320 Bay Street
          P.O. Box 1
          Toronto, Ontario
          M5H 4A6

          Attention:       Vice President, Client Services
          Telecopier No.:  416-643-5570

Any notice or other communication given personally shall be deemed to have been
given and received upon delivery thereof and if given by telecopy shall be
deemed to have been given and received on the date of receipt thereof unless
such day is not a Business Day in which case it shall be deemed to have been
given and received upon the immediately following Business Day.

14.4      Notice to Beneficiaries

          Any and all notices to be given and any documents to be sent to any
Beneficiaries may be given or sent to the address of such Beneficiary shown on
the register of holders of Exchangeable Shares in any manner permitted by the
by-laws of NPS Allelix Inc. from time to time in force in respect of notices to
members and shall be deemed to be received (if given or sent in such manner) at
the time specified in such by-laws, the provisions of which by-laws shall apply
mutatis mutandis to notices or documents as aforesaid sent to such
Beneficiaries.

14.5      Counterparts

          This Agreement may be executed in counterparts, each of which shall be
deemed an original, but all of which taken together shall constitute one and the
same instrument.

14.6      Jurisdiction

          This Agreement shall be construed and enforced in accordance with the
laws of the Province of Ontario and the laws of Canada applicable therein.

14.7      Attornment

          Each of the Trustee, NPS and NPS Allelix Inc. agrees that any action
or proceeding arising out of or relating to this Agreement may be instituted in
the courts of the Province of Ontario, waives any objection which it may have
now or hereafter to the venue of any such action or proceeding,

                                      F-28
<PAGE>

irrevocably submits to the jurisdiction of the said courts in any such action or
proceeding, agrees to be bound by any judgment of the said courts and not to
seek, and hereby waives, any review of the merits of any such judgment by the
courts of any other jurisdiction and NPS hereby appoints NPS Allelix Inc. at its
registered office in the Province of Nova Scotia as attorney for service of
process.

          IN WITNESS WHEREOF the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                              NPS PHARMACEUTICALS, INC.

                              By:    _______________________________________
                              Name:
                              Title:

                              NPS ALLELIX INC.


                              By:    _______________________________________
                              Name:
                              Title:


                              CIBC MELLON TRUST COMPANY

                              By:    _______________________________________
                              Name:
                              Title:

                              By:    _______________________________________
                              Name:
                              Title:

                                      F-29
<PAGE>

                                                       Court File No. 99-CL-3491

                           SUPERIOR COURT OF JUSTICE

                                COMMERCIAL LIST

THE HONOURABLE JUSTICE                 )  TUESDAY, THE 2nd
                                       )
[P. H. LISSAMAN.]                      )  DAY OF NOVEMBER, 1999

In The Matter Of Section 182 Of The BUSINESS CORPORATIONS act (Ontario) R.S.O.
1990, c.B.16, As Amended

On Behalf Of:

            1380390 Ontario Inc. and Allelix Biopharmaceuticals Inc.

                                                                      Applicants

     Application By 1380390 Ontario Inc. and Allelix Biopharmaceuticals Inc.
     Pursuant To Section 182 Of The Business Corporations Act, R.S.O. 1990,
     c.B.16 In Respect Of An Arrangement Involving The Applicants And NPS
     Pharmaceuticals, Inc.

[SEAL OF THE SUPERIOR COURT OF JUSTICE]


                                 INTERIM ORDER

          THIS MOTION, made by the applicants (the "Applicants"), Allelix
Biopharmaceuticals Inc. ("Allelix") and 1380390 Ontario Inc., a wholly-owned
subsidiary of Allelix ("1380390"), for an order for advice and directions of the
Court in connection with a business combination among Allelix, 1380390 and NPS
Pharmaceuticals, Inc. ("NPS"), constituting an arrangement (the "Arrangement")
under section 182 of the Business Corporations Act (Ontario) ("OBCA"), as
contemplated in the Plan of Arrangement (the "Plan of Arrangement") which is
Schedule A to the arrangement agreement dated September 27, 1999 among Allelix
and NPS, as amended by an amendment agreement dated October 28, 1999 between

                                      G-1
<PAGE>


Allelix and NPS (the "Arrangement Agreement") was heard this day at 393
University Avenue, Toronto, Ontario.

          ON READING the Notice of Motion, the Notice of Application issued on
October 28, 1999, and the Affidavit of Paul J. Van Damme, sworn on October 29,
1999 (the "Van Damme Affidavit") (including the Plan of Arrangement which is
attached as Appendix D to the draft management proxy circular of Allelix (the
"Circular") which, in turn, is marked as Exhibit "A" to the Van Damme
Affidavit), and on hearing the submissions of counsel for the Applicants and
counsel for NPS, and it appearing that the Arrangement, if approved, will result
in Allelix and 1380390 amalgamating under the OBCA (and continuing under the
name "Allelix Biopharmaceuticals Inc.") and NPS and its affiliates becoming the
sole beneficial owners of all of the outstanding shares in the capital of
Allelix;

          THIS COURT makes the following order (the "Interim Order") under
section 182 of the OBCA and the Rules of Civil Procedure:

1.  THIS COURT ORDERS that the sole shareholder of 1380390 be and is permitted
to pass a unanimous shareholder resolution to approve the Arrangement in lieu of
1380390 calling, holding and conducting a special meeting of its shareholder for
the purposes thereof;

2.  THIS COURT ORDERS that Allelix be and is permitted to call, hold and conduct
a special meeting (the "Allelix Meeting") of the registered holders of common
shares in the capital of Allelix ("Allelix Common Shares") and the registered
holders of preferred share, Series 1 shares, in the capital of Allelix ("Allelix
Preferred Shares") (the registered holders of Allelix Common Shares and the
registered holders of Allelix Preferred Shares are collectively referred to as
the "Allelix Securityholders") to be held at TSE Place, The Exchange Tower, 2
First

                                      G-2
<PAGE>

Canadian Place, 130 King Street West, Toronto, Ontario on Wednesday, December
15, 1999 at 2:00 p.m. (Toronto time) for, among other things:

      (a)  the registered holders of Allelix Common Shares and the holders of
           Allelix Preferred Shares to consider and, if determined advisable,
           approve a special resolution (the "Continuance Resolution") approving
           the continuance of Allelix under the OBCA (the "Continuance"); and

      (b)  the class consisting of registered holders of Allelix Common Shares
           and the class consisting of registered holders of Allelix Preferred
           Shares to each, separately, consider and, if determined advisable,
           approve a special resolution approving the Arrangement (the
           "Arrangement Resolution").

3.  THIS COURT ORDERS that the Allelix Meeting may be called in accordance with
the Canada Business Corporations Act ("CBCA"), the notice of special meeting of
Allelix Securityholders, which is page 1 of the Circular which is marked as
Exhibit "A" to the Van Damme Affidavit ("Notice of Special Meeting"), and the
articles and by-laws of Allelix, subject to what may be provided hereafter and
subject to further order of this Court.

4.  THIS COURT ORDERS that the Allelix Meeting as it relates to the Continuance
and the Continuance Resolution may be held and conducted in accordance with the
CBCA, the Notice of Special Meeting, and the articles and by-laws of Allelix,
subject to what may be provided hereafter and subject to further order of this
Court.

5.  THIS COURT ORDERS that the Allelix Meeting, as it relates to the Arrangement
and the Arrangement Resolution, shall be held and conducted in accordance with
the OBCA, the Notice of Special Meeting, and the articles and by-

                                      G-3
<PAGE>

laws of Allelix, subject to what may be provided hereafter and subject to
further order of this Court.

6.        THIS COURT ORDERS that Allelix, if it deems advisable, is specifically
authorized to adjourn or postpone the Allelix Meeting on one or more occasions,
without the necessity of first convening the Allelix Meeting or first obtaining
any vote of Allelix Securityholders respecting the adjournment or postponement.

7.        THIS COURT ORDERS that Allelix, if it deems it advisable, may, upon
the Continuance Resolution being passed by Allelix Securityholders at the
Allelix Meeting, continue the Allelix Meeting to consider and, if deemed
advisable, pass the Arrangement Resolution, without postponement or delay by
reason of Allelix's intended application for a certificate of continuance
pursuant to the OBCA; provided that articles of continuance pursuant to the OBCA
are filed with the Director appointed under the OBCA prior to the time a Final
Order (as such term is defined in paragraph 19 below) is sought under this
Application.

NOTICE OF MEETING

8.        THIS COURT ORDERS that the Notice of Special Meeting, Circular and
form of proxy (collectively referred to as the "Meeting Materials"), with such
amendments or additional documents as counsel for Allelix may advise are
necessary or desirable, and as are not inconsistent with the terms of this
Interim Order, may be sent to:

     (a)  the registered holders of Allelix Common Shares and the registered
          holders of Allelix Preferred Shares at the close of business on
          November 10, 1999 (the "Record Date"), at least twenty-one (21) days
          prior to the date of the Allelix Meeting excluding the date of
          mailing, delivery or transmittal and the date of the Allelix Meeting,
          by one or more of the following methods:

                                      G-4
<PAGE>

     (i)   by first class prepaid mail, addressed to each registered holder of
           Allelix Common Shares and each registered holder of Allelix Preferred
           Shares at his, her or its address as it appears on the applicable
           share registers of Allelix as at the Record Date;

     (ii)  by delivery, in person or by recognized courier service, to the
           addresses specified in 8(a)(i) above; or

     (iii) by facsimile transmission to any registered holder of Allelix Common
           Shares or registered holder of Allelix Preferred Shares who
           identifies himself, herself or itself to the satisfaction of Allelix
           and CIBC Mellon Trust Company, acting through its representatives,
           who requests such facsimile transmission and, if required by Allelix,
           is prepared to pay the charges for such facsimile transmission;

 (b)  the directors and auditors of Allelix, by mailing the Meeting Materials by
      prepaid ordinary mail to such persons at least twenty-one (21) days prior
      to the date of the Allelix Meeting, excluding the date of mailing and the
      date of the Allelix Meeting; and

 (c)  The Toronto Stock Exchange and The Montreal Exchange, by electronically
      filing the Meeting Materials via SEDAR at least twenty-one (21) days prior
      to the date of the Allelix Meeting, excluding the date of filing and the
      date of the Allelix Meeting;

and that compliance with this paragraph shall constitute good and sufficient
notice of the Allelix Meeting.

                                      G-5
<PAGE>

DEEMED RECEIPT OF MEETING MATERIALS

9.      THIS COURT ORDERS that the Meeting Materials shall be deemed, for the
purposes of this Interim Order, to have been received by Allelix
Securityholders:

   (a)  in the case of mailing, three (3) days after delivery thereof to the
        post office;

   (b)  in the case of delivery in person, upon receipt thereof at the intended
        recipient's address or, in the case of delivery by courier, one (1)
        business day after receipt by the courier; and

   (c)  in the case of facsimile transmission, upon the transmission thereof.

PERMITTED ATTENDEES

10.     THIS COURT ORDERS that the only persons entitled to attend the Meeting
shall be:

   (a)  the registered holders of Allelix Common Shares and the registered
        holders of Allelix Preferred Shares, or their respective proxies;

   (b)  Allelix's officers, directors, auditors and advisors;

   (c)  representatives of NPS; and

   (d)  other persons with the permission of the Chairman of the Allelix
        Meeting;

and that the only persons entitled to vote at the Allelix Meeting shall be:

   (a)  the registered holders of Allelix Common Shares and registered holders
        of Allelix Preferred Shares as at the close of business on November 10,
        1999, or their respective proxies; and

                                      G-6
<PAGE>

   (b)  persons who become registered holders of Allelix Common Shares or
        Allelix Preferred Shares after November 10, 1999, and who become
        entitled to vote by complying with subsection 138(2) of the CBCA.

11.     THIS COURT ORDERS that the accidental omission to give notice of the
Allelix Meeting, or the non-receipt of such notice, shall not invalidate any
resolution passed or proceedings taken at the Allelix Meeting.

QUORUM AND VOTING

12.     THIS COURT ORDERS that the quorum required at the Allelix Meeting shall
be at least two persons present at the Allelix Meeting, each being a registered
holder of Allelix Common Shares or Allelix Preferred Shares or a duly appointed
proxyholder or representative for an absent registered holder of Allelix Common
Shares or Allelix Preferred Shares, collectively holding or representing by
proxy not less than 30 percent of the outstanding Allelix Common Shares and 30
percent of the outstanding Allelix Preferred Shares, provided that, if no quorum
is present within 30 minutes of the appointed meeting time, the Allelix Meeting
shall stand adjourned to be reconvened on a day which is not more than 30 days
later, as determined by the Chairman of the Meeting, in the Chairman's sole
discretion, and at such reconvened meeting, those persons present in person or
by proxy entitled to vote at such meeting will constitute a quorum for the
reconvened meeting.

13.     THIS COURT ORDERS that votes shall be taken at the Allelix Meeting on
the basis of one (1) vote per Allelix Common Share and one (1) vote per Allelix
Preferred Share, and that subject to further Order of this Court:

   (a)  the vote required to pass the Continuance Resolution shall be the
        affirmative vote of at least 66 2/3 percent of the votes cast by the
        Allelix Securityholders present in person or by proxy and entitled to
        vote at

                                      G-7
<PAGE>

        the Allelix Meeting (excluding spoiled, illegible and/or defective votes
        and abstentions); and

   (b)  the vote required to pass the Arrangement Resolution shall be the
        affirmative vote of at least (i) 66 2/3 percent of the votes cast by the
        registered holders of Allelix Common Shares present in person or by
        proxy and entitled to vote at the Allelix Meeting (excluding spoiled,
        illegible and/or defective votes and abstentions); and (ii) 66 2/3
        percent of the votes cast by the registered holders of Allelix Preferred
        Shares present in person or by proxy and entitled to vote at the Allelix
        Meeting (excluding spoiled, illegible and/or defective votes and
        abstentions).

AMENDMENTS

14.     THIS COURT ORDERS that Allelix is authorized to make such amendments,
revisions or supplements to the Plan of Arrangement as it may determine
advisable, without any additional notice to the Allelix Securityholders, and the
Plan of Arrangement as so amended, revised or supplemented shall be the Plan of
Arrangement submitted to the Allelix Meeting and the subject of the Arrangement
Resolution.

PROXY SOLICITATION

15.     THIS COURT ORDERS that Allelix is authorized to use the form of proxy,
in substantially the same form as attached as Exhibit "B" to the Van Damme
Affidavit.

16.     THIS COURT ORDERS that Allelix may in its discretion waive generally the
time limits for the deposit of proxies by the Allelix Securityholders, if
Allelix deems it advisable to do so.

                                      G-8
<PAGE>

DISSENT RIGHTS

17.  THIS COURT ORDERS that the registered holders of Allelix Common Shares
shall be permitted to dissent from the Arrangement in accordance with the
procedures prescribed by section 190 of the CBCA and the terms of the
Arrangement and to seek fair value (within the meaning of that term in the CBCA)
for their Allelix Common Shares provided that they strictly comply with the
requirements of section 190 of the CBCA and the Plan of Arrangement.

SERVICE OF COURT MATERIALS

18.  THIS COURT ORDERS that (i) Allelix shall include in the Meeting Materials,
when sent in accordance with paragraph 8 of this Interim Order, a copy of the
Notice of Application herein and the Interim Order (collectively, the "Court
Materials"); (ii) the mailing of the Meeting Materials shall constitute good and
sufficient service of the Court Materials upon all who may wish to appear in
this proceeding and no other form of service need be effected and no other
material need be served on such persons in respect of these proceedings unless a
Notice of Appearance is served on the Applicants' solicitors no less than 5 days
before the hearing of this Application; and (iii) such Court Materials shall be
deemed to have been received at the times specified in accordance with paragraph
9 of this Interim Order, whether such persons reside within Ontario or within
another jurisdiction.

SANCTION HEARING

19.  THIS COURT ORDERS that, upon the approval by the Allelix Securityholders of
the Continuance and the Arrangement, in the manner set forth in this Interim
Order, Allelix may apply to this Court for an Order approving the Arrangement
(the "Final Order") and that the Application be set down for hearing before a
judge sitting on the Commercial List at the Courthouse at 393 University Avenue,
Toronto, Ontario.

                                      G-9
<PAGE>

20.  THIS COURT ORDERS that, if the Allelix Meeting is called, held and
conducted in the manner permitted by this Interim Order, the shareholder
approval for the Arrangement required under this Interim Order is given at the
Allelix Meeting and Allelix is continued under the OBCA before the return date
of this Application, Allelix will be deemed to have complied with the statutory
requirements in section 182 of the OBCA for the purposes of the hearing of this
Application to approve the Arrangement.

21.  THIS COURT ORDERS that the only persons entitled to notice of any further
proceedings (including the hearing of the application of the application for the
Final Order), and to appear and to be heard thereon, shall be (a) the
Applicants; and (b) persons who have filed a notice of appearance herein in
accordance with the Rules of Civil Procedure and this Interim Order.

22.  THIS COURT ORDERS that any notice of appearance served in response to the
Notice of Application shall be served on counsel for Allelix and 1380390 at the
following address: Stikeman, Elliott, Suite 5300, Commerce Court West, Toronto,
Ontario, M5L 1B9, Attention: Eliot N. Kolers.

VARIANCE

23.  THIS COURT ORDERS that Allelix or 1380390 shall be entitled, at any time,
to seek leave to vary this Interim Order.
EXTRA-TERRITORIAL ASSISTANCE

24.  THIS COURT SEEKS AND REQUESTS that the aid and recognition of any court or
any judicial, regulatory or administrative body in any province of Canada and
any judicial, regulatory or administrative tribunal or other court constituted
pursuant to the Parliament of Canada or the legislature of any province and any
court or any judicial, regulatory or administrative body of the United States

                                     G-10
<PAGE>

and the states or other subdivisions of the United States to act in aid of and
to be complementary to this Court in carrying out the terms of this Order.

                              /s/___________________________________
                              [ENTERED ON BOOK NO:

                                      NOV 02 1999]

                                     G-11
<PAGE>

<TABLE>
<S>                                            <C>                                                        <C>
1380390 ONTARIO INC. and ALLELIX               Application by 1380390 Ontario Inc. and Allelix            Court File No. 99-CL-3491
         BIOPHARMACEUTICALS INC.               Biopharmaceuticals Inc. Pursuant to the Section 182
                      Applicants               of the Business Corporations Act, R.S.O. 1990, c.B.16
                                               in respect of an arrangement involving the Applicants
                                               and NPS Pharmaceuticals, Inc.
</TABLE>



                                                    SUPERIOR COURT OF JUSTICE
                                                          COMMERCIAL LIST

                                                 Proceeding commenced at Toronto

                                                          INTERIM ORDER

                                                  Stikeman, Elliott
                                                  Barristers & Solicitors
                                                  Commerce Court West
                                                  53rd Floor, P.O. Box 85
                                                  Toronto, Canada  M5L 1B9

                                                  Patrick O'Kelly  LSUC #241882P
                                                  Tel:  (416) 869-5633
                                                  Eliot N. Kolers  LSUC #38304Y
                                                  Tel:  (416) 869-5637
                                                  Fax:  (416) 947-0866

                                                  Solicitors for the Applicants

                                     G-12
<PAGE>

                               SUPPORT AGREEMENT



          MEMORANDUM OF AGREEMENT made as of the . day of ., ..

A M O N G:

          NPS PHARMACEUTICALS, INC.,
          a corporation existing under the laws of the State of Delaware
          (hereinafter referred to as "NPS"),

                                                              OF THE FIRST PART,

          - and -

          NPS HOLDINGS COMPANY
          an unlimited liability company existing under the laws of the Province
          of Nova Scotia (hereinafter referred to as "NPS Holdings"),

                                                             OF THE SECOND PART,

          - and -

          NPS ALLELIX INC.
          a company limited by shares existing under the laws of the Province of
          Nova Scotia (hereinafter referred to as "NPS Allelix Inc."),

                                                             OF THE THIRD PART.

          WHEREAS in connection with an arrangement agreement (the "Arrangement
Agreement") made as of September 27, 1999 between NPS and Allelix
Biopharmaceuticals Inc. ("Allelix"), as amended, NPS Allelix Inc. is to issue
exchangeable shares (the "Exchangeable Shares") to certain holders of securities
of Allelix pursuant to the plan of arrangement (the "Arrangement") contemplated
by the Arrangement Agreement;

          AND WHEREAS pursuant to the Arrangement Agreement, NPS, NPS Holdings
Company and NPS Allelix Inc. have agreed to execute a support agreement
substantially in the form of this Agreement;

          NOW THEREFORE in consideration of the respective covenants and
agreements provided in this Agreement and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties hereto covenant and agree as follows:

                                   ARTICLE 1
                        DEFINITIONS AND INTERPRETATION

1.1       Defined Terms

          Each term denoted herein by initial capital letters and not otherwise
defined herein shall have the meaning ascribed thereto in the rights,
privileges, restrictions and conditions (collectively, the

                                      H-1
<PAGE>

"Share Provisions") attaching to the Exchangeable Shares attached as Appendix 1
to the Plan of Arrangement as set out in the Articles of Arrangement of Allelix,
unless the context requires otherwise.

1.2       Interpretation Not Affected by Headings

          The division of this agreement into Articles, sections and other
portions and the insertion of headings are for convenience of reference only and
shall not affect the construction or interpretation of this agreement. Unless
otherwise indicated, all references to an "Article" or "section" followed by a
number and/or a letter refer to the specified Article or section of this
agreement. The terms "this Agreement", "hereof", "herein" and "hereunder" and
similar expressions refer to this agreement and not to any particular Article,
section or other portion hereof and include any agreement or instrument
supplementary or ancillary hereto.

1.3       Number, Gender

          Words importing the singular number only shall include the plural and
vice versa. Words importing any gender shall include all genders.

1.4       Date for any Action

          If any date on which any action is required to be taken under this
agreement is not a Business Day, such action shall be required to be taken on
the next succeeding Business Day. For the purposes of this agreement, a
"Business Day" means any day on which commercial banks are open for business in
Salt Lake City, Utah and Toronto, Ontario other than a Saturday, a Sunday or a
day observed as a holiday in Salt Lake City, Utah under the laws of the State of
Utah or the federal laws of the United States of America or in Toronto, Ontario
under the laws of the Province of Ontario or the federal laws of Canada.

                                   ARTICLE 2
                       COVENANTS OF NPS AND NPS HOLDINGS

2.1       Covenants Regarding Exchangeable Shares

          So long as any Exchangeable Shares not owned by NPS or its Affiliates
are outstanding, NPS will:

     (a)  not declare or pay any dividend on the NPS Common Shares unless (i)
          NPS Allelix Inc. shall simultaneously declare or pay, as the case may
          be, an equivalent dividend (as provided for in the Share Provisions)
          on the Exchangeable Shares and (ii) NPS Allelix Inc. shall have
          sufficient money or other assets or authorized but unissued securities
          available to enable the due declaration and the due and punctual
          payment, in accordance with applicable law, of any such dividend on
          the Exchangeable Shares;

     (b)  advise NPS Allelix Inc. sufficiently in advance of the declaration by
          NPS of any dividend on NPS Common Shares and take all such other
          actions as are reasonably necessary, in co-operation with NPS Allelix
          Inc., to ensure that the respective declaration date, record date and
          payment date for a dividend on the Exchangeable Shares shall be the
          same as the declaration date, record date and payment date for the
          corresponding dividend on the NPS Common Shares;

     (c)  ensure that the record date for any dividend declared on NPS Common
          Shares is not less than 10 Business Days after the declaration date of
          such dividend;

                                      H-2
<PAGE>

     (d)  take all such actions and do all such things as are reasonably
          necessary or desirable to enable and permit NPS Allelix Inc., in
          accordance with applicable law, to pay and otherwise perform its
          obligations with respect to the satisfaction of the Liquidation
          Amount, the Retraction Price or the Redemption Price in respect of
          each issued and outstanding Exchangeable Share (other than
          Exchangeable Shares owned by NPS or its Affiliates) upon the
          liquidation, dissolution or winding-up of NPS Allelix Inc., the
          delivery of a Retraction Request by a holder of Exchangeable Shares or
          a redemption of Exchangeable Shares by NPS Allelix Inc., as the case
          may be, including without limitation all such actions and all such
          things as are necessary or desirable to enable and permit NPS Allelix
          Inc. to cause to be delivered NPS Common Shares to the holders of
          Exchangeable Shares in accordance with the provisions of Article 5, 6
          or 7, as the case may be, of the Share Provisions; and

     (e)  take all such actions and do all such things as are reasonably
          necessary or desirable to enable and permit NPS Holdings, in
          accordance with applicable law, to perform its obligations arising
          upon the exercise by it of the Liquidation Call Right, the Retraction
          Call Right or the Redemption Call Right, including without limitation
          all such actions and all such things as are necessary or desirable to
          enable and permit NPS Holdings to cause to be delivered NPS Common
          Shares to the holders of Exchangeable Shares in accordance with the
          provisions of the Liquidation Call Right, the Retraction Call Right or
          the Redemption Call Right, as the case may be.

2.2       Segregation of Funds

          NPS will cause NPS Allelix Inc. to deposit a sufficient amount of
funds in a separate account of NPS Allelix Inc. and segregate a sufficient
amount of such other assets and property as is necessary to enable NPS Allelix
Inc. to pay dividends when due and to pay or otherwise satisfy its respective
obligations under Article 5, 6 or 7 of the Share Provisions, as applicable.

2.3       Reservation of NPS Common Shares

          NPS hereby represents, warrants and covenants in favour of NPS Allelix
Inc. and NPS Holdings that NPS has reserved for issuance and will, at all times
while any Exchangeable Shares (other than Exchangeable Shares held by NPS or its
Affiliates) are outstanding, keep available, free from pre-emptive and other
rights, out of its authorized and unissued capital stock such number of NPS
Common Shares (or other shares or securities into which NPS Common Shares may be
reclassified or changed as contemplated by section 2.7 hereof) (a) as is equal
to the sum of (i) the number of Exchangeable Shares issued and outstanding from
time to time and (ii) the number of Exchangeable Shares issuable upon the
exercise of all rights to acquire Exchangeable Shares outstanding from time to
time and (b) as are now and may hereafter be required to enable and permit NPS
to meet its obligations under the Voting and Exchange Trust Agreement and under
any other security or commitment pursuant to which NPS may now or hereafter be
required to issue NPS Common Shares, to enable and permit NPS Holdings to meet
its obligations under each of the Liquidation Call Right, the Retraction Call
Right and the Redemption Call Right and to enable and permit NPS Allelix Inc. to
meet its respective obligations hereunder and under the Share Provisions.

2.4       Notification of Certain Events

          In order to assist NPS to comply with its obligations hereunder and to
permit NPS Holdings to exercise the Liquidation Call Right, the Retraction Call
Right and the Redemption Call Right, NPS Allelix Inc. will notify NPS and NPS
Holdings of each of the following events at the time set forth below:

                                      H-3
<PAGE>

     (a)  in the event of any determination by the Board of Directors of NPS
          Allelix Inc. to institute voluntary liquidation, dissolution or
          winding-up proceedings with respect to NPS Allelix Inc. or to effect
          any other distribution of the assets of NPS Allelix Inc. among its
          shareholders for the purpose of winding up its affairs, at least 60
          days prior to the proposed effective date of such liquidation,
          dissolution, winding-up or other distribution;

     (b)  promptly, upon the earlier of receipt by NPS Allelix Inc. of notice of
          and NPS Allelix Inc. otherwise becoming aware of any threatened or
          instituted claim, suit, petition or other proceedings with respect to
          the involuntary liquidation, dissolution or winding-up of NPS Allelix
          Inc. or to effect any other distribution of the assets of NPS Allelix
          Inc. among its members for the purpose of winding up its affairs;

     (c)  immediately, upon receipt by NPS Allelix Inc. of a Retraction Request;

     (d)  on the same date on which notice of redemption is given to holders of
          Exchangeable Shares, upon the determination of a Redemption Date in
          accordance with the Share Provisions; and

     (e)  as soon as practicable upon the issuance by NPS Allelix Inc. of any
          Exchangeable Shares or rights to acquire Exchangeable Shares (other
          than the issuance of Exchangeable Shares and rights to acquire
          Exchangeable Shares in exchange for outstanding Allelix Common Shares
          pursuant to the Arrangement).

2.5       Delivery of Common Shares to NPS Allelix Inc. and NPS Holdings

          In furtherance of its obligations under sections 2.1(d) and (e)
hereof, upon notice from NPS Allelix Inc. or NPS Holdings of any event that
requires NPS Allelix Inc. or NPS Holdings, to cause to be delivered NPS Common
Shares to any holder of Exchangeable Shares, NPS shall forthwith issue and
deliver or cause to be delivered to NPS Allelix Inc. or NPS Holdings the
requisite number of NPS Common Shares to be received by, and issued to or to the
order of, the former holder of the surrendered Exchangeable Shares, as NPS
Allelix Inc. or NPS Holdings shall direct. All such NPS Common Shares shall be
duly authorized and validly issued as fully paid and non-assessable and shall be
free and clear of any lien, claim or encumbrance. In consideration of the
issuance and delivery of each such NPS Common Share, NPS Allelix Inc. or NPS
Holdings, as the case may be, shall pay a cash purchase price equal to the fair
market value of such NPS Common Shares.

2.6       Qualification of NPS Common Shares

          If any NPS Common Shares (or other shares or securities into which NPS
Common Shares may be reclassified or changed as contemplated by section 2.7
hereof) to be issued and delivered hereunder require registration or
qualification with or approval of or the filing of any document, including any
prospectus or similar document or the taking of any proceeding with or the
obtaining of any order, ruling or consent from any governmental or regulatory
authority under any Canadian or United States federal, provincial or state
securities or other law or regulation or pursuant to the rules and regulations
of any securities or other regulatory authority or the fulfillment of any other
United States or Canadian legal requirement before such shares (or such other
shares or securities) may be issued by NPS and delivered by NPS at the direction
of NPS Holdings or NPS Allelix Inc., if applicable, to the holder of surrendered
Exchangeable Shares or in order that such shares (or such other shares or
securities) may be freely traded thereafter (other than any restrictions of
general application on transfer by reason of a holder being a "control person"
for purposes of Canadian provincial securities law or an "affiliate" of NPS for
purposes of United States federal or state securities law), NPS will in good
faith expeditiously take all such actions and do all such things as are
necessary or desirable to cause such NPS Common Shares (or such other shares or
securities) to be and remain duly registered, qualified or approved under United
States and/or

                                      H-4
<PAGE>

Canadian law, as the case may be. NPS will in good faith expeditiously take all
such actions and do all such things as are reasonably necessary or desirable to
cause all NPS Common Shares (or such other shares or securities) to be delivered
hereunder to be listed, quoted or posted for trading on all stock exchanges and
quotation systems on which outstanding NPS Common Shares (or such other shares
or securities) have been listed by NPS and remain listed and are quoted or
posted for trading at such time.

2.7       Economic Equivalence

          So long as any Exchangeable Shares not owned by NPS or its Affiliates
are outstanding:

     (a)  NPS will not without prior approval of NPS Allelix Inc. and the prior
          approval of the holders of the Exchangeable Shares given in accordance
          with section 10.2 of the Share Provisions:

           (i)   issue or distribute NPS Common Shares (or securities
                 exchangeable for or convertible into or carrying rights to
                 acquire NPS Common Shares) to the holders of all or
                 substantially all of the then outstanding NPS Common Shares by
                 way of stock dividend or other distribution, other than an
                 issue of NPS Common Shares (or securities exchangeable for or
                 convertible into or carrying rights to acquire NPS Common
                 Shares) to holders of NPS Common Shares who exercise an option
                 to receive dividends in NPS Common Shares (or securities
                 exchangeable for or convertible into or carrying rights to
                 acquire NPS Common Shares) in lieu of receiving cash dividends;
                 or

           (ii)  issue or distribute rights, options or warrants to the holders
                 of all or substantially all of the then outstanding NPS Common
                 Shares entitling them to subscribe for or to purchase NPS
                 Common Shares (or securities exchangeable for or convertible
                 into or carrying rights to acquire NPS Common Shares); or

           (iii) issue or distribute to the holders of all or substantially all
                 of the then outstanding NPS Common Shares (A) shares or
                 securities of NPS of any class other than NPS Common Shares
                 (other than shares convertible into or exchangeable for or
                 carrying rights to acquire NPS Common Shares), (B) rights,
                 options or warrants other than those referred to in section
                 2.7(a)(ii) above, (C) evidences of indebtedness of NPS or (D)
                 assets of NPS,

          unless the economic equivalent on a per share basis of such rights,
          options, securities, shares, evidences of indebtedness or other assets
          is issued or distributed simultaneously to holders of the Exchangeable
          Shares; provided that, for greater certainty, the above restrictions
          shall not apply to any securities issued or distributed by NPS in
          order to give effect to and to consummate the transactions
          contemplated by, and in accordance with, the Arrangement Agreement.

     (b)  NPS will not without the prior approval of NPS Allelix Inc. and the
          prior approval of the holders of the Exchangeable Shares given in
          accordance with section 10.2 of the Share Provisions:

           (i)   subdivide, redivide or change the then outstanding NPS Common
                 Shares into a greater number of NPS Common Shares; or

           (ii)  reduce, combine, consolidate or change the then outstanding NPS
                 Common Shares into a lesser number of NPS Common Shares; or

                                      H-5
<PAGE>

           (iii) reclassify or otherwise change NPS Common Shares or effect an
                 amalgamation, merger, reorganization or other transaction
                 affecting NPS Common Shares,

          unless the same or an economically equivalent change shall
          simultaneously be made to, or in the rights of the holders of, the
          Exchangeable Shares.

     (c)  NPS will ensure that the record date for any event referred to in
          section 2.7(a) or 2.7(b) above, or (if no record date is applicable
          for such event) the effective date for any such event, is not less
          than five Business Days after the date on which such event is declared
          or announced by NPS (with contemporaneous notification thereof by NPS
          to NPS Allelix Inc.).

     (d)  The Board of Directors of NPS Allelix Inc. shall determine, in good
          faith and in its sole discretion, economic equivalence for the
          purposes of any event referred to in section 2.7(a) or 2.7(b) above
          and each such determination shall be conclusive and binding on NPS. In
          making each such determination, the following factors shall, without
          excluding other factors determined by the Board of Directors of NPS
          Allelix Inc. to be relevant, be considered by the Board of Directors
          of NPS Allelix Inc.:

           (i)   in the case of any stock dividend or other distribution payable
                 in NPS Common Shares, the number of such shares issued in
                 proportion to the number of NPS Common Shares previously
                 outstanding;

           (ii)  in the case of the issuance or distribution of any rights,
                 options or warrants to subscribe for or purchase NPS Common
                 Shares (or securities exchangeable for or convertible into or
                 carrying rights to acquire NPS Common Shares), the relationship
                 between the exercise price of each such right, option or
                 warrant and the Current Market Price;

           (iii) in the case of the issuance or distribution of any other form
                 of property (including without limitation any shares or
                 securities of NPS of any class other than NPS Common Shares,
                 any rights, options or warrants other than those referred to in
                 section 2.7 (d) (ii) above, any evidences of indebtedness of
                 NPS or any assets of NPS), the relationship between the fair
                 market value (as determined by the Board of Directors of NPS
                 Allelix Inc. in the manner above contemplated) of such property
                 to be issued or distributed with respect to each outstanding
                 NPS Common Share and the Current Market Price;

           (iv)  in the case of any subdivision, redivision or change of the
                 then outstanding NPS Common Shares into a greater number of NPS
                 Common Shares or the reduction, combination, consolidation or
                 change of the then outstanding NPS Common Shares into a lesser
                 number of NPS Common Shares or any amalgamation, merger,
                 reorganization or other transaction affecting NPS Common
                 Shares, the effect thereof upon the then outstanding NPS Common
                 Shares; and

           (v)   in all such cases, the general taxation consequences of the
                 relevant event to holders of Exchangeable Shares to the extent
                 that such consequences may differ from the taxation
                 consequences to holders of NPS Common Shares as a result of
                 differences between taxation laws of Canada and the United
                 States (except for any differing consequences arising as a
                 result of differing marginal taxation rates and without regard
                 to the individual circumstances of holders of Exchangeable
                 Shares).

                                      H-6
<PAGE>

     (e)  NPS Allelix Inc. agrees that, to the extent required, upon due notice
          from NPS, NPS Allelix Inc. will use its best efforts to take or cause
          to be taken such steps as may be necessary for the purposes of
          ensuring that appropriate dividends are paid or other distributions
          are made by NPS Allelix Inc., or subdivisions, redivisions or changes
          are made to the Exchangeable Shares, in order to implement the
          required economic equivalent with respect to the NPS Common Shares and
          Exchangeable Shares as provided for in this section 2.7.

2.8       Tender Offers

          In the event that a tender offer, share exchange offer, issuer bid,
take-over bid or similar transaction with respect to NPS Common Shares (an
"Offer") is proposed by NPS or is proposed to NPS or its shareholders and is
recommended by the Board of Directors of NPS, or is otherwise effected or to be
effected with the consent or approval of the Board of Directors of NPS, and the
Exchangeable Shares are not redeemed by NPS Allelix Inc. or purchased by NPS
Holdings pursuant to the Redemption Call Right, NPS will use its reasonable
efforts expeditiously and in good faith to take all such actions and do all such
things as are necessary or desirable to enable and permit holders of
Exchangeable Shares (other than NPS and its Affiliates) to participate in such
Offer to the same extent and on an economically equivalent basis as the holders
of NPS Common Shares, without discrimination. Without limiting the generality of
the foregoing, NPS will use its reasonable efforts expeditiously and in good
faith to ensure that holders of Exchangeable Shares may participate in each such
Offer without being required to retract Exchangeable Shares as against NPS
Allelix Inc. (or, if so required, to ensure that any such retraction, shall be
effective only upon, and shall be conditional upon, the closing of such Offer
and only to the extent necessary to tender or deposit to the Offer). Nothing
herein shall affect the rights of NPS Allelix Inc. to redeem (or NPS Holdings to
purchase pursuant to the Redemption Call Right) Exchangeable Shares, as
applicable, in the event of a NPS Control Transaction.

2.9       Ownership of Outstanding Shares

          Without the prior approval of NPS Allelix Inc. and the prior approval
of the holders of the Exchangeable Shares given in accordance with section 10.2
of the Share Provisions, NPS covenants and agrees in favour of NPS Allelix Inc.
that, as long as any outstanding Exchangeable Shares are owned by any Person
other than NPS or any of its Affiliates, NPS will be and remain the direct or
indirect beneficial owner of all issued and outstanding voting shares in the
capital of NPS Allelix Inc. and NPS Holdings.

2.10      NPS and Affiliates Not to Vote Exchangeable Shares

          NPS covenants and agrees that it will appoint and cause to be
appointed proxyholders with respect to all Exchangeable Shares held by it and
its Affiliates for the sole purpose of attending each meeting of holders of
Exchangeable Shares in order to be counted as part of the quorum for each such
meeting. NPS further covenants and agrees that it will not, and will cause its
Affiliates not to, exercise any voting rights which may be exercisable by
holders of Exchangeable Shares from time to time pursuant to the Share
Provisions or pursuant to the provisions of the Companies Act (Nova Scotia) (or
any successor or other corporate statute by which NPS Allelix Inc. may in the
future be governed) with respect to any Exchangeable Shares held by it or by its
Affiliates in respect of any matter considered at any meeting of holders of
Exchangeable Shares.

2.11      Rule 10b-18 Purchases

          For certainty, nothing contained in this Agreement, including without
limitation the obligations of NPS contained in section 2.8 hereof, shall limit
the ability of NPS or NPS Allelix Inc. to make a "Rule 10b-18 Purchase" of NPS
Common Shares pursuant to Rule 10b-18 of the United States Securities Exchange
Act of 1934, as amended.

                                      H-7
<PAGE>

2.12      Stock Exchange Listing

          NPS covenants and agrees in favour of NPS Allelix Inc. that, as long
as any outstanding Exchangeable Shares are owned by any Person other than NPS or
any of its Affiliates, NPS will use its reasonable efforts to maintain a listing
for such Exchangeable Shares on a Canadian stock exchange.

                                   ARTICLE 3
                                NPS SUCCESSORS

3.1       Certain Requirements in Respect of Combination, etc.

          NPS shall not consummate any transaction (whether by way of
reconstruction, reorganization, consolidation, merger, transfer, sale, lease or
other-wise) whereby all or substantially all of its undertaking, property and
assets would become the property of any other Person or, in the case of a
merger, of the continuing corporation resulting therefrom unless, but may do so
if:

     (a)  such other Person or continuing corporation (the "NPS Successor") by
          operation of law, becomes, without more, bound by the terms and
          provisions of this Agreement or, if not so bound, executes, prior to
          or contemporaneously with the consummation of such transaction, an
          agreement supplemental hereto and such other instruments (if any) as
          are reasonably necessary or advisable to evidence the assumption by
          the NPS Successor of liability for all moneys payable and property
          deliverable hereunder and the covenant of such NPS Successor to pay
          and deliver or cause to be delivered the same and its agreement to
          observe and perform all the covenants and obligations of NPS under
          this Agreement; and

     (b)  such transaction shall be upon such terms and conditions as
          substantially to preserve and not to impair in any material respect
          any of the rights, duties, powers and authorities of the other parties
          hereunder.

3.2       Vesting of Powers in Successor

          Whenever the conditions of section 3.1 have been duly observed and
performed, the parties, if required by section 3.1, shall execute and deliver
the supplemental agreement provided for in section 3.1(a) and thereupon the NPS
Successor shall possess and from time to time may exercise each and every right
and power of NPS under this Agreement in the name of NPS or otherwise and any
act or proceeding by any provision of this Agreement required to be done or
performed by the Board of Directors of NPS or any officers of NPS may be done
and performed with like force and effect by the directors or officers of such
NPS Successor.

3.3       Wholly-Owned Subsidiaries

          Subject to section 6.5(w) of the Arrangement Agreement, nothing herein
shall be construed as preventing the amalgamation or merger of any wholly-owned
direct or indirect subsidiary of NPS with or into NPS or the winding-up,
liquidation or dissolution of any wholly-owned subsidiary of NPS provided that
all of the assets of such subsidiary are transferred to NPS or another wholly-
owned direct or indirect subsidiary of NPS and any such transactions are
expressly permitted by this Article 3.

                                      H-8
<PAGE>

                                   ARTICLE 4
                                    GENERAL

4.1       Term

          This Agreement shall come into force and be effective as of the date
hereof and shall terminate and be of no further force and effect at such time as
no Exchangeable Shares (or securities or rights convertible into or exchangeable
for or carrying rights to acquire Exchangeable Shares) are held by any Person
other than NPS and any of its Affiliates.

4.2       Changes in Capital of NPS and NPS Allelix Inc.

          At all times after the occurrence of any event contemplated pursuant
to sections 2.7 and 2.8 hereof or otherwise, as a result of which either NPS
Common Shares or the Exchangeable Shares or both are in any way changed, this
agreement shall forthwith be amended and modified as necessary in order that it
shall apply with full force and effect, mutatis mutandis, to all new securities
into which NPS Common Shares or the Exchangeable Shares or both are so changed
and the parties hereto shall execute and deliver an agreement in writing giving
effect to and evidencing such necessary amendments and modifications.

4.3       Severability

          If any provision of this Agreement is held to be invalid, illegal or
unenforceable, the validity, legality or enforceability of the remainder of this
Agreement shall not in any way be affected or impaired thereby and this
Agreement shall be carried out as nearly as possible in accordance with its
original terms and conditions.

4.4       Amendments, Modifications

          This Agreement may not be amended or modified except by an agreement
in writing executed by NPS Allelix Inc., NPS Holdings and NPS and approved by
the holders of the Exchangeable Shares in accordance with section 10.2 of the
Share Provisions.

4.5       Ministerial Amendments

          Notwithstanding the provisions of section 4.4, the parties to this
Agreement may in writing at any time and from time to time, without the approval
of the holders of the Exchangeable Shares, amend or modify this Agreement for
the purposes of:

     (a)  adding to the covenants of any or all parties provided that the Board
          of Directors of each of NPS Allelix Inc., NPS Holdings and NPS shall
          be of the good faith opinion that such additions will not be
          prejudicial to the rights or interests of the holders of the
          Exchangeable Shares;

     (b)  making such amendments or modifications not inconsistent with this
          Agreement as may be necessary or desirable with respect to matters or
          questions which, in the good faith opinion of the Board of Directors
          of each of NPS Allelix Inc., NPS Holdings and NPS, it may be expedient
          to make, provided that each such Board of Directors shall be of the
          good faith opinion that such amendments or modifications will not be
          prejudicial to the rights or interests of the holders of the
          Exchangeable Shares; or

     (c)  making such changes or corrections which, on the advice of counsel to
          NPS Allelix Inc., NPS Holdings and NPS, are required for the purpose
          of curing or correcting any ambiguity or defect or inconsistent
          provision or clerical omission or mistake or manifest

                                      H-9
<PAGE>

          error, provided that the Boards of Directors of each of NPS Allelix
          Inc., NPS Holdings and NPS shall be of the good faith opinion that
          such changes or corrections will not be prejudicial to the rights or
          interests of the holders of the Exchangeable Shares.

4.6       Meeting to Consider Amendments

          NPS Allelix Inc., at the request of NPS, shall call a meeting or
meetings of the holders of the Exchangeable Shares for the purpose of
considering any proposed amendment or modification requiring approval pursuant
to section 4.4 hereof. Any such meeting or meetings shall be called and held in
accordance with the bylaws of NPS Allelix Inc., the Share Provisions and all
applicable laws.

4.7       Amendments Only in Writing

          No amendment to or modification or waiver of any of the provisions of
this Agreement otherwise permitted hereunder shall be effective unless made in
writing and signed by all of the parties hereto.

4.8       Enurement

          This Agreement shall be binding upon and enure to the benefit of the
parties hereto and their respective successors and assigns.

4.9       Notices to Parties

          All notices and other communications between the parties to this
Agreement shall be in writing and shall be deemed to have been given if
delivered personally or by confirmed telecopy to the parties at the following
addresses (or at such other address for any such party as shall be specified in
like notice):

          NPS Pharmaceuticals, Inc.
          420 Chipeta Way
          Salt Lake City, UT 84108
          Attention: Hunter Jackson
          Telecopier No.: 801-583-4961

          with a copy to:

          Blake, Cassels & Graydon
          Box 25, Commerce Court West
          199 Bay Street, 28/th/ Floor
          Toronto, OntarioM5L 1A9
          Attention: Rob Collins
          Telecopier No.: (416) 863-2653

          Any notice or other communication given personally shall be deemed to
have been given and received upon delivery thereof and if given by telecopy
shall be deemed to have been given and received on the date of confirmed receipt
thereof unless such day is not a Business Day in which case it shall be deemed
to have been given and received upon the immediately following Business Day.

4.10      Counterparts

          This Agreement may be executed in counterparts, each of which shall be
deemed an original, and all of which taken together shall constitute one and the
same instrument.

                                     H-10
<PAGE>

4.11      Jurisdiction

          This Agreement shall be construed and enforced in accordance with the
laws of the Province of Ontario and the laws of Canada applicable therein.

4.12      Attornment

          Each of the parties hereto agrees that any action or proceeding
arising out of or relating to this Agreement may be instituted in the courts of
the Province of Ontario, waives any objection which it may have now or hereafter
to the venue of any such action or proceeding, irrevocably submits to the
jurisdiction of the said courts in any such action or proceeding, agrees to be
bound by any judgment of the said courts and not to seek, and hereby waives, any
review of the merits of any such judgment by the courts of any other
jurisdiction and NPS hereby appoints NPS Allelix Inc. at its registered office
in the Province of Ontario as attorney for service of process.

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed as of the date first above written.

                              NPS PHARMACEUTICALS, INC.

                              By:______________________________
                              Name:
                              Title:


                              NPS HOLDINGS COMPANY

                              By:______________________________
                              Name:
                              Title:


                              NPS ALLELIX INC.

                              By:______________________________
                              Name:
                              Title:

                                     H-11
<PAGE>

                               ANNUAL INFORMATION

                                 Incorporation

   Allelix Biopharmaceuticals Inc. (the "Company" or "Allelix") is governed by
the provisions of the Canada Business Corporations Act. The Company was
originally incorporated in 1981 as Allelix Inc. and its original emphasis was
on agricultural biotechnology and human diagnostics. In October 1989, the
Company redirected its focus to human therapeutics and changed its name to
Allelix Biopharmaceuticals Inc.

   The Corporation's head office is located in the City of Mississauga at 6850
Goreway Drive, Mississauga, Ontario L4V 1V7.

   In December 1991, the articles of the Company were amended to combine the
outstanding series A and B common shares into a single class of common shares
on a two for one basis and to create a class of preference shares. As a result
of this amendment Allelix is currently authorized to issue an unlimited number
of common shares and an unlimited number of preference shares in series. The
Company's directors are authorized to create and issue these preferred shares.
In November 1998, 1,000 preferred shares--Series 1, were issued to Johnson &
Johnson Development Corporation ("JJDC") for US$2,000,000.

   In May 1996, Allelix incorporated a subsidiary company Base4 Bioinformatics
Inc. ("Base4") pursuant to the provisions of the Canada Business Corporations
Act. Base4 will develop and apply bioinformatics techniques to drug discovery
and development.

   On July 29, 1997, Allelix acquired all of the outstanding shares and
extinguished certain outstanding debt of Allelix Neuroscience Inc., formerly
Trophix Pharmaceuticals Inc. ["Trophix"] of South Plainfield, New Jersey, in
exchange for 2,495,203 Allelix common shares valued at $24,450,000 and
US$3,222,000 in cash. Following the completion of a licensing agreement with
Janssen Pharmaceutica N.V., ("Janssen") a US$1,000,000 milestone payment
payable in Allelix common shares to the former Trophix shareholders was made.
As a result, the Company issued 486,395 common shares valued at $3.19 each in
November 1998. Up to an additional US$3,000,000 may be paid to Trophix
shareholders in Allelix common shares upon achievement by Allelix Neuroscience
Inc. of further clinical and commercial milestones by July 29, 2001. The
acquisition added a new technology platform and three products to the Company's
neuroscience portfolio for the treatment of schizophrenia and/or dementia, for
neuropathic pain and for spinal cord injury. Allelix Neuroscience Inc. moved
its offices to Cranbury, New Jersey in December 1998.

   On April 8, 1997, the Company and Pharm-Eco Laboratories, Inc. ["Pharm-Eco"]
of Lexington, Massachusetts formed Allelix Pharm-Eco LP, a United States
limited partnership, to develop jointly two families of neuropharmaceutical
compounds for cognition enhancement and cocaine addiction. Allelix paid
US$1,800,000, consisting of 88,094 Allelix common shares valued at $12.62 each
and US$1,000,000 in cash to Pharm-Eco for its interest in the joint venture.
The Company further invested US$1,000,000 in the joint venture in April 1997 to
fund pre-clinical development of the two programs to bring Allelix's ownership
interest to 60.5%. The purchase was accounted for as research and development
acquired. During 1998, the Company paid an additional US$1,800,000 by issuing
247,295 Allelix common shares to Pharm-Eco following the achievement of certain
commercial milestones. Allelix invested in the joint venture an additional
US$1,000,000 in cash and converted its accounts receivable of US$839,000 from
the Allelix Pharm-Eco LP into units of the partnership to bring Allelix's
ownership interest to 68.2%. Under the terms of the agreement with Pharm-Eco,
the Company will be responsible for its proportionate 68.2% share of the
research and development costs while Pharm-Eco will be responsible for the
balance.

                        General Development of Business

   Allelix was formed in 1989 as the result of a management buyout of the
company then known as Allelix Inc. During 1989 the Company raised $8.4 million
from institutional and strategic investors. The Company

                                      I-1
<PAGE>

completed an initial public offering in December 1991 to raise $25 million and
its common shares are listed on the Montreal and Toronto stock exchanges.

Overview of Business Activities

   Allelix discovers and develops pharmaceutical product candidates for
commercialization through partnerships with established pharmaceutical
companies. Allelix discovers products by applying chemical and biological
approaches to disease targets identified through biotechnology. The Company has
completed a Phase II clinical trial for its leading product candidate: ALX1-11,
a recombinant form of human parathyroid hormone, for the treatment of
postmenopausal osteoporosis and in 1998 completed a Phase I trial for the
treatment of migraine. The Company has developed core capabilities in two areas
of pharmaceutical drug discovery: protein therapeutics (particularly
recombinant production of proteins and peptides) and receptor and transporter-
based drug design (focussed specifically in neuroscience) and has organized
itself into two business units around these areas of expertise. The Company
believes that the core capabilities of its business units represent technology
platforms, which can be applied within and between the business units to
support development of additional product candidates.

   The Company discovers, patents and develops promising lead compounds as
human therapeutics. If such products are successfully commercialized, they
typically enjoy significant periods of market exclusivity (depending on patent
protection granted). To achieve profitable operations the Company, alone or
with others, must successfully develop and obtain regulatory approvals to
market its products. To obtain these regulatory approvals and to achieve
commercial success clinical trials must demonstrate that the products are safe
for use in humans and that they are effective. There can be no assurances that
the research and development conducted by Allelix will result in commercially
viable products.

   All of Allelix's products are in either the research or the development
stage and therefore the Company does not generate revenue from product sales.
The Company funds its operations with the proceeds from collaborations with
corporate partners, the sale of equity, interest income and government grants.

   The Company forms strategic collaborations with established pharmaceutical
companies to exploit fully its technological strengths in drug discovery and
gain access to worldwide pharmaceutical markets. Allelix currently has five
significant collaborative agreements with established pharmaceutical companies:
two agreements with Eli Lilly Canada Inc. ("Eli Lilly") to discover new drugs
for psychiatric, neurological and eating disorders, two agreements with Janssen
to discover new drugs for schizophrenia and/or dementia, and for neuropathic
pain plus an agreement with Hoechst Marion Roussel ("Hoechst") for dopamine D4
drugs for neuropsychiatric disorders. To strengthen and accelerate its research
and development efforts, the Company also has established a network of
collaborations with universities, academics, clinicians and research
institutions.

   In deciding to initiate, continue or discontinue scientific programs,
management rigorously evaluates each discovery target and product candidate
from a commercial perspective, focusing on unserved or underserved medical
needs which represent significant commercial opportunities. Market size,
development cost, competitive environment, intellectual property protection,
and attractiveness to potential pharmaceutical industry partners, among other
factors impact the commercial opportunity.

   Allelix's business strategy is to enhance shareholder value by focusing on
its core strengths through its business unit structure; developing technology
platforms for drug discovery and development; collaborating with established
pharmaceutical companies for broad-based clinical trials and worldwide
commercialization; while building and maintaining strong relationships with
universities, academics, clinicians and research institutions to gain access to
novel product candidates and technologies. Patent protection is secured
wherever possible. It is the Company's full intent to reach profitability in as
short a time period as possible.

                                      I-2
<PAGE>

                       Narrative Description of Business
Business Units

 Protein Therapeutics

   The primary focus of the Protein Therapeutics business unit is the
development and commercialization of protein-based drugs for treating medical
diseases or disorders related to hormone abnormalities or deficiencies. The
scientific staff that supports the Protein Therapeutics business unit has
experience in microbiology, protein manufacturing, purification and analytical
chemistry.

   A key strength of the Company is its ability to develop efficient production
processes for the manufacture of recombinant therapeutic proteins like ALX1-11.
The Company has developed a proprietary production process to produce PTH by
fermentation and purification in accordance with the Food and Drug
Administration ("FDA") and European Community Good Manufacturing Practices
(GMP). In selecting protein-based product candidates the Company favours those
that can be produced recombinantly through its proprietary E. coli production
process.

 ALXI-11 Osteoporosis Program

   Allelix has developed ALX1-11, the full-length recombinant parathyroid
hormone PTH, an 84 amino acid protein, as a treatment for postmenopausal
osteoporosis. Osteoporosis is a progressive skeletal disease characterized by
the loss of bone mass and bone mineral density leading to fractures. Bone mass
decreases with age, particularly in women, leaving the bones prone to fracture,
especially in the wrist, spine and hip. In women, this condition typically
occurs after menopause and the complications from these fractures can lead to
hospitalization and death. Approximately 20% of osteoporosis patients are male.

   Demographic studies have shown that 35% of women over the age of 50 will
suffer an osteoporosis-related fracture during their lifetime. In North
America, 1.5 million individuals sustain a fracture related to this disease
each year, including 300,000 hip fractures, resulting in a significant economic
burden on the health care system. The National Osteoporosis Foundation in the
United States estimates that a woman's risk of suffering a hip fracture is
equal to her combined risk of developing breast, uterine and ovarian cancer.
The annual cost of osteoporosis in the United States in 1995 was estimated to
be more than US$13 billion. The National Institutes of Health estimate that, on
a worldwide basis, more than 200 million people suffer from reduced bone mass,
which contributes to more than 4 million fractures annually. Mortality in the
first year following a hip fracture is 15% to 20%. The successful treatment of
osteoporosis would result in the reduction of bone fractures, significantly
improving quality of life and reducing health care costs associated with
treatment and chronic care.

   ALX1-11 is a recombinant form of human PTH. PTH is a hormone that plays an
important role in the natural regulation of bone mineral metabolism in the
body. Recently published studies have shown that PTH has a marked stimulatory
effect on new bone formation in animals when administered as a single daily
injection. Furthermore, several clinical investigators have demonstrated in
independent studies that a fragment of the PTH molecule enhances bone formation
in humans. Allelix believes that these results, published over the past 20
years, suggest that PTH is able to reverse bone loss in osteoporosis sufferers.
Allelix believes that PTH increases the number of bone-forming cells and may
also increase the activity of such cells. The increase in bone density observed
in these studies was confirmed in the Phase II clinical trial indicating that
PTH may represent a significant treatment alternative for osteoporosis
sufferers. The results demonstrated that PTH significantly increases bone
mineral density and bone content in the spine of women with postmenopausal
osteoporosis.

   Traditional treatments for osteoporosis include calcium supplements, vitamin
D compounds, estrogen replacement therapy, calcitonin, diet and exercise. In
addition, a class of drugs known as bisphosphonates has been developed which
slow the resorption of bone and over several years can increase bone mass by
amounts ranging from 3% to 8%. Alendronate, marketed by Merck and Co. Inc.
("Merck") under the brand name

                                      I-3
<PAGE>

Fosamax, is the most recently approved bisphosphonate and has demonstrated an
increase in bone mineral density ("BMD") of 8% over three years and a reduction
in the incidence of bone fractures by 50%. However, there is a widely
recognized need for a treatment that can prevent fractures by replacing lost
bone more rapidly. The Company believes that PTH may address this need. If
approved for commercial sale, ALX1-11 would be positioned as a therapy for
postmenopausal osteoporosis in patients who either have suffered a fracture due
to osteoporosis, or have been diagnosed to have significantly decreased bone
mass. Once bone mass is restored, patients could be treated with anti-
resorptive therapeutics. The Company has no way of knowing the extent or
progress of such competitors' trials. If any such trial were to result in
regulatory approval to market a competing PTH the market potential of ALX1-11
could be adversely affected. See "Competition".

   In 1994, Allelix conducted a Phase I clinical trial in The Netherlands that
demonstrated the safety of ALX1-11 in humans. The Phase II clinical trial for
ALX1-11 was initiated in June 1995 in 18 centres throughout Canada and the
United States and involved over 200 women suffering from postmenopausal
osteoporosis. The trial was a double blind, placebo-controlled, dose-ranging
safety and efficacy study and the course of treatment was 12 months. Patients
self-administered one of three different dosages of ALX1-11 or a placebo by
subcutaneous injection in a manner similar to self-administered daily insulin
injections by diabetics. The goal of the clinical trial was to compare the
relative effectiveness of the three dose levels on spinal BMD. Blood samples
were taken in the clinical trial to monitor the effects of the drug on several
biochemical markers of bone growth and bone metabolism. In June 1996, Allelix
entered into a collaboration agreement with Astra AB ("Astra") for the
development and commercialization of ALX1-11 for osteoporosis. See
"Collaboration Agreements--Development Agreement with Astra AB". The Phase II
trial was completed in February 1997. The final report was submitted to Astra
in June 1997 and Astra conveyed its decision to conduct a Phase III trial with
ALX1-11 to Allelix in September 1997. In September 1998, Astra notified the
Company that it would return all of the assets associated with the program and
all related proprietary rights to Allelix at no cost and paid a 4,800,000
Netherlands Guilders cancellation penalty.

   Since PTH is a protein, it must be administered by subcutaneous injection at
the present time. There is a possibility that alternate routes of
administration such as inhalation, intranasal or transdermal may be feasible. A
number of companies are investigating alternative routes of administration for
a variety of peptides. In particular, insulin has been shown to be absorbed by
the inhalation route and calcitonin is commercially available in an intranasal
form. Allelix believes that there is at least one company working on an
inhalation form of PTH. The feasibility of administering PTH by one of these
other routes is unknown and will need to be investigated.

 ALX-0600 (Glucagon-Like Peptide-2 or GLP-2)

   ALX-0600 is an analog of glucagon-like peptide-2 (GLP-2), a naturally
occurring 33 amino acid hormone. A published study by one of the Company's
academic collaborators demonstrated that the use of ALX-0600 in animals
resulted in a marked stimulatory effect on the rate of growth of epithelial
cells lining the small intestine. In this study, GLP-2 induced an approximately
50% increase in weight of small intestine epithelium within ten days of
administration. The Company believes that ALX-0600 may have the ability to
induce a similar effect in humans. Furthermore, the growth-promoting properties
of ALX-0600 appear to be highly tissue-specific, predominantly affecting the
small intestine, thereby reducing the risk of adverse side effects.

   The Company is currently developing ALX-0600 for the treatment of short
bowel syndrome, a condition caused by removal of large segments of the small
intestine. Approximately 20,000 to 40,000 patients in North America have
undergone surgical resection (removal) of a portion of the small intestine
because of gastrointestinal problems that cause the intestine to malfunction.
Patients with this condition often do not have enough small intestine remaining
after resection to allow for the absorption of sufficient nutrients from the
diet since the epithelium of the small intestine is the primary site of
nutrient absorption. There are currently no effective therapies available for
enhancing the growth and repair of the small intestine epithelium. In extreme
cases, the remaining intestine is no longer able to perform its normal function
of transporting vital nutrients into the blood stream.

                                      I-4
<PAGE>

   Patients with severely impaired intestinal function caused by short bowel
syndrome often must be fed intravenously by a technique called total parenteral
nutrition ("TPN") for a period of time, and in some cases permanently. TPN
costs can exceed $100,000 annually per patient. Approximately 100,000 people in
North America are on long-term TPN. The Company believes that ALX-0600 for
short bowel syndrome may qualify for orphan drug status in the U.S. because of
the small patient population, the poor quality of life and the high mortality
rate facing these patients, and the current absence of an effective therapy for
enhancing growth and repair of small intestine epithelium. There is no
assurance that the Company will be successful in obtaining orphan drug status
for ALX-0600. See "Risk Factors--Government Regulation; No Assurance of
Regulatory Approval".

   Allelix is also investigating the use of ALX-0600 for the replenishment of
epithelial cells of the small intestine which are damaged by chemotherapy
treatment for cancer. The Company believes that ALX-0600 may be suitable as an
adjunct therapy to cancer chemotherapy if it can ameliorate the toxic
gastrointestinal side effects, thereby improving patient compliance with the
chemotherapy regimen and possibly allowing for dose escalation of the
chemotherapy agent. The principal agents that would benefit from such an
adjunctive therapy are 5-fluorouracil (administered to approximately 1 million
patients per year) and CPT-11 (approximately 500,000 patients per year and
increasing). Approximately 16% and 50% of patients receiving these respective
therapies experience extreme gastrointestinal side effects sufficient to
warrant treatment with an agent such as ALX-0600 should its safety and efficacy
be proven in clinical trials.

   Allelix is evaluating the potential use of ALX-0600 for the treatment of
other intestinal disorders, such as inflammatory bowel diseases and other
conditions and diseases associated with impaired intestinal function.

   The Company has licensed rights to ALX-0600 from an academic collaborator
who is entitled to participate in the proceeds of commercialization of the
product candidates, if successfully developed and approved. The Company
completed a Phase I clinical trial of ALX-0600 in normal subjects in November
1998. Allelix has also identified a supplier of clinical grade ALX-0600. The
Company is also developing a recombinant production system that may be used to
produce the product.

   The U.S. Patent and Trademark Office ("PTO") in August 1998 issued a Notice
of Allowance to the Company for its basic patent containing claims covering the
composition and medical uses of ALX-0600 and related gastrointestinal drug
candidate compounds.

Neuroscience

   The primary focus of the Neuroscience business unit is the use of rational
drug design to develop novel drug candidates for the treatment of psychiatric,
neurological and immunological disorders. The business unit has demonstrated
its ability to discover and utilize human neuroreceptors, ion channels and
neurotransporters for drug screening. The unit is currently developing product
candidates for schizophrenia, dementia, obesity, diabetes, migraine, drug
abuse, spasticity and pain.

   Control of physiological function in the nervous system depends on
production by nerve cells ("neurons") of chemical messengers called
neurotransmitters. These neurotransmitters interact with proteins located on
the surface of target cells (receptors or ion channels), thereby inducing
physiological activity. Neurotransmitters also interact with other membrane-
bound proteins (transporters) which control their actions by removing the
neurotransmitters from the synapse. Drugs can be designed to interact with
these membrane proteins to inhibit or augment the activity of the natural
neurotransmitter and bring about a therapeutic effect. Typically, receptor, ion
channels and transporters exist in families with several similar variations, or
subtypes, and it is possible to design drugs which interact only with
particular subtypes, leaving others unaffected. Such drugs will interfere
selectively with the physiological activity governed by the specific subtype,
potentially maximizing efficacy while reducing the risk of undesirable side
effects.

   By using biochemical pharmacology methods to study the binding of
neurotransmitters to their recognition sites, chemists can design drugs that
bind more strongly and more selectively to specific subtypes. Computer-

                                      I-5
<PAGE>

based molecular modelling studies of the receptor, ion channel or transporter
and of their interaction with drugs provide useful information to chemists in
designing novel and more effective drugs. These technologies make the overall
drug discovery process more efficient and predictive.

   The number and diversity of targets that continue to be discovered in the
human brain complicate neuropharmaceutical drug design. Until the late 1980s,
new drug compounds were mostly discovered by random screening and the success
rate was approximately one active compound for each 20,000 tested. Now,
pharmacology is a key element in the streamlined discovery strategy which
applies rational drug design to molecular targets. By understanding the
structure and nature of the targets, compounds are synthesized to fit the
target and the success rate of identifying active compounds improves.

   Allelix applies an integrated discovery strategy, with close co-operation
between chemists and pharmacologists, using tools provided by molecular and
cellular biologists and computer modelers. Allelix biologists clone human
receptor, ion channel and transporter genes and induce cells to express
proteins from these genes. Genetically engineered cells which express the pure
protein at their surface are used for discovery and evaluating chemical
libraries provided by Allelix's collaborative partners. Finally, the actions of
potential drug candidates emerging from the screening process are tested in
vivo, using in-house behavioral pharmacology expertise, in animal models of CNS
diseases.

 Migraine

   Migraine is a debilitating CNS disorder that affects more than 20 million
people in North America. At present, the "triptans", lead by sumatriptan, are
the dominant players in the estimated US$1.5 billion market. The "triptans" are
non-selective serotonergic agonists that demonstrate approximately equal
affinities for both the 5-HT1D and 5-HT1B receptor subtypes. Although these
compounds have efficacy as anti-migraine therapeutics, they have received class
labelling from the regulatory authorities due to the risk of serious
cardiovascular events. As the 5-HT1B receptor, but not the 5-HT1D receptor, is
expressed on human blood vessels, Allelix scientists hypothesized that 5-HT1B
likely mediates the coronary artery vasospasm. Consequently, Allelix used a
receptor-based drug design approach to identify and develop subtype-selective
compounds that have high affinity for 5-HT1D and minimal activity at 5-HT1B.
ALX-0646, our development compound, demonstrated efficacy in animal models
predictive of anti-migraine activity and importantly, ALX-0646 was virtually
devoid of activity on isolated human coronary arteries. In 1998, ALX-0646
completed a Phase Ia clinical trial in the United Kingdom. The compound was
deemed safe and no significant adverse events were detected during the study at
any of the dose levels examined. In particular, no cardiovascular effects were
reported. The company is preparing for Phase II studies in the United States in
1999 and the identification of a development and commercialization partner is
currently underway.

 GlyT-1 for Schizophrenia and Dementia with Janssen Pharmaceutica N.V.

   Prospective drug candidates are glycine reuptake inhibitors selective for
the GlyT-1 transporter. GlyT-1 inactivates the neurotransmitter glycine by
transport (reuptake) out of the synapse back into the releasing nerve cell.
Glycine acts as a co-transmitter with glutamic acid at the NMDA receptor. There
is evidence that this receptor is in a hypofunctional state in schizophrenia.
Based on this, Allelix has established a program to discover drugs which block
the reuptake of glycine. This approach should result in increased levels of
glycine, resultant activation of the NMDA receptor and a novel route to a
therapeutic effect in schizophrenia. In addition, the NMDA receptor is known to
be essential for learning and memory. Because of this, the Company is also
targeting reuptake inhibitors for dementia where the hallmark symptom is memory
loss.

   In October 1998, Allelix entered into a collaborative agreement with Janssen
for the development and commercialization of GlyT-1 inhibitors for
schizophrenia and dementia. It is the intent of the partners to have a
development candidate in clinical trial by the end of 1999. See "Collaboration
Agreements--Development Agreement with Janssen Pharmaceutica N.V.".

                                      I-6
<PAGE>

 Research with Pharm-Eco Laboratories Inc.

   In 1997 Allelix and Pharm-Eco established a joint venture ("JV") to develop
and commercialize therapeutic agents for dementia and cocaine abuse.

 Dementia Program

   Dementia, primarily Alzheimer's disease, is a major public health problem
globally, afflicting over 20 million people worldwide and increasing in
incidence with age to about one in two in the eighth decade of life. One of the
hallmark symptoms of dementia is memory loss and overall decline of cognitive
ability. The ability to treat dementia pharmacologically has only been realised
in the last several years, but existing treatments are of limited efficacy.
Only two drugs have been approved in North America to date (COGNEX(TM) and
ARICEPT(TM)) and both of these are of the same class. The Allelix Pharm-Eco JV
has identified ALE-26015, a compound that has been shown to enhance long term
potentiation ("LTP") and cognitive performance in animals as a novel approach
to treating dementia. LTP is widely believed to represent the fundamental
cellular mechanism of learning and memory. The Company believes that ALX-26015,
by enhancing LTP, could represent a means of improving memory and cognitive
function in Alzheimer's disease patients. The Company has received approval to
conduct Phase I studies in the United Kingdom, and will begin human dosing
early in 1999.

   The Company plans to develop the compound through Phase I clinical trials
and license it to a major pharmaceutical partner. Partnering discussions have
been initiated.

 Cocaine Abuse Program

   The JV is collaborating with the U.S. National Institute of Drug Abuse
(whose mission is to reduce substance abuse) to develop a dopamine reuptake
inhibitor (DRI), as a substitution therapy for cocaine abuse. There is
currently no approved pharmacotherapeutic available to treat this form of
substance abuse, which afflicts approximately 1 million individuals in North
America, and engenders large dollar costs to society. Cocaine is believed to
exert its addictive effects by blocking the inactivation mechanism for the
neurotransmitter dopamine, which mediates reinforcing behavior. The Company
believes that DRI treatment can block the effects of cocaine at the
inactivation site for dopamine and relieve the abuser of the need to ingest
more cocaine.

 CNS Receptor Research with Eli Lilly Canada Inc.

   Allelix and Eli Lilly first entered into a collaborative agreement in
November 1989 to develop excitatory amino acid ("EAA") receptors as therapeutic
targets. EAA receptors, encoded by a large gene family, mediate the actions of
glutamate, the primary excitatory neurotransmitter in the central nervous
system. As a result of their important role in neuronal communication,
glutamatergic dysfunction has been implicated in variety of neuropathological
conditions, including neuropsychiatric disorders, Alzheimer's disease, epilepsy
and secondary damage caused by stroke. These diseases continue to represent
significant unmet medical need. Allelix has cloned and expressed the majority
of human EAA receptors in stable cell lines for use as drug targets. Research
efforts have identified numerous subtype-selective series' of compounds that
have the potential to treat a number of the above therapeutic indications. The
first clinical candidates are expected to be declared in early 1999. The
success of the research and the commitment of both parties to continue their
leadership role in this area is reflected by the two year extension and
expansion of the EAA program signed in November 1998.

   In 1994, the Eli Lilly collaboration was expanded to include the
identification of novel neuropeptide Y (NPY) receptors implicated in eating
disorders leading to obesity. With few safe and effective drugs on the market,
obesity continues to be a growing problem in North America. Current estimates
suggest that 50% of all adults in the United States are clinically obese. In
1997, the program was broadened further to include a genomics-based approach
focused on identifying novel genetic targets as tools for drug discovery in
obesity and diabetes mellitus. These efforts are ongoing and the program has
been extended for one year until the end of 1999.

                                      I-7
<PAGE>

 Research on Neuron-Selective Sodium Channels with Janssen Pharmaceutica N. V

   In December 1995, Trophix, entered into a collaborative research agreement
with Janssen, a wholly owned subsidiary of Johnson & Johnson, for the discovery
and development of compounds for the treatment of neuropathic pain. Janssen is
responsible for all research and development costs and has exclusive marketing
rights to drugs resulting from the collaboration. The Company received
approximately US$0.8 million from Janssen under the terms of the agreement in
1998. Allelix will receive milestone payments upon the achievement of
development and clinical benchmarks, as well as royalties when a product is
commercialized. This program is in discovery phase.

 Dopamine Receptor Research with Hoechst Marion Roussel

   In January 1995, Allelix entered into a research collaboration agreement
with Hoechst to discover and develop D4 receptor-specific compounds for the
treatment of antipsychotic disorders, particularly schizophrenia. See
"Collaboration Agreements--Dopamine D4 Receptor Research Agreement with Hoechst
Marion Roussel".

   Allelix has completed use of the human dopamine D4 receptor subtype to
identify specific D4 antagonists, in collaboration with Hoechst, with the
objective of producing more selective drugs for the treatment of
neuropsychiatric disorders. Potential drug candidates from both Allelix and
Hoechst were identified during 1997 and are being further evaluated for a
number of potential therapeutic indications, in pre-clinical testing, by
Hoechst. Future development of the potential drug candidates, as per the
collaborative agreement, now lies with Hoechst.

Other Initiatives

 Resolution Pharmaceuticals Inc.

   Allelix and MDS Nordion Inc., ("Nordion"), a Canadian-based company that is
the world's leading supplier of technetium, formed Resolution Pharmaceuticals
Inc. ("Resolution") in August 1992 as a joint venture to develop peptide based
radiopharmaceuticals for the diagnosis of disease using nuclear imaging.
Allelix currently owns 21.8% of Resolution after giving effect to a $10 million
private financing in May 1996. The joint venture was created to take advantage
of Allelix's expertise in peptides and receptor based drug design and Nordion's
knowledge of the radiopharmaceuticals industry. Resolution's
radiopharmaceuticals consist of peptide-targeting compounds, chemically linked
(chelated) with the radioisotope technetium-99m. The peptide portions of the
molecules are used to target receptors affiliated with disease, while
technetium provides images useful in disease diagnosis. The unique structure
and specificity of the peptides permit their selective accumulation at disease
sites to allow physicians to diagnose internal disorders using imaging cameras.
The use of these labeled peptides represents the latest advance in the
development of imaging agents as they are inexpensive to produce, have a low
probability of immune reaction and clear from the blood faster, resulting in
increased imaging sensitivity and superior image quality relative to other
imaging agents. Resolution has two products in clinical trials. The most
advanced RP128 for the diagnostic imaging of inflammation has successfully
completed Phase II trials for rheumatoid arthritis and Crohn's disease. A
further clinical trial for osteomyelitis is underway conducted by our corporate
partner CIS BioInternational. RP527 which images prostate, breast and small
cell lung cancer started Phase I/II clinical trials in January 1999. Other
diagnostic and therapeutic radiopharmaceutical products for the cancer and
neuroscience markets are anticipated to enter clinical trials in 1999-2000.

 Base4 Bioinformatics Inc.

   In May 1996, Allelix incorporated Base4 to develop and apply bioinformatics
techniques to drug discovery and development. In January 1998, Base4 completed
a private financing by raising $4.5 million of equity capital. Allelix now
holds a 29.2% ownership interest in the company. Base4 had twenty-eight
employees at August 1998.

                                      I-8
<PAGE>

   Bioinformatics applies advanced information technology methodologies to the
management and analysis of pharmaceutical discovery information. The need for
these methods has developed in part because of the various genome-sequencing
projects underway internationally, which are doubling the number of known gene
sequences every 15-18 months. These sequences provide a wealth of new targets
for pharmaceutical development. Comparable advances in chemistry and
pharmacology have generated major information management issues.

   Base4 developed and markets PharMatrix(TM), which is a browser-based
collaborative Knowledge Management and Project Management System tailored for
the pharmaceutical and biotechnology industries. Built upon the Livelink(TM)
product from Open Text Corporation, PharMatrix addresses specific requirements
of the target industries. The structure of Project Management and Laboratory
Management components are ideally suited to Base4's typical client's matrix
organizations and processes. Allelix was the first customer of PharMatrix.

   Within the biotechnology industry, often the specialized nature of a
company's activities precludes applying an "off the shelf" software solution to
its information management requirements. In such cases, a custom database
solution is in order and Base4 has the expertise to guide customers through the
specification, design, development, implementation and testing stages of the
system development process. This ensures that the ultimate system incorporates
state of the art technology, fully achieves the customer's business objectives
and is able to grow and evolve with the customer's business.

   Base4 employs advanced computer networking methods and software that allows
its staff to be distributed to multiple geographic sites within research
institutes allowing them to work closely with the scientific staff of these
institutes. Base4 has recently renewed its supply agreement with Canada's
National Research Council ("NRC") to take responsibility for the NRC's Canadian
Bioinformatics Resource "CBR" database that is available to biological
researchers. Base4 has also entered into collaboration arrangements with the
Samuel Lunenfeld Research Institute at Mount Sinai Hospital in Toronto and with
the Centre for Molecular Medicine and Therapeutics of the University of British
Columbia in Vancouver. An office in Carlsbad, California was recently opened
and an office in the eastern United States is planned to serve customers in
that region.

Collaboration Agreements

   The Company forms strategic alliances with established pharmaceutical
companies to exploit fully its technological strengths, gain access to
worldwide pharmaceutical markets and to generate revenue. Allelix's timing and
choice of partner for such collaborations are based on the costs involved in
conducting further trials, Allelix's available resources, and the risk profile
of the product candidate, among other considerations. The collaboration
agreements Allelix enters into include rights of termination in favour of
Allelix's partners. Furthermore, these agreements generally provide that
Allelix will not conduct independently, or with any third party, any research
that competes with the research conducted under the collaborative program. See
"Risk Factors--Dependence on Strategic Alliances".

 Protein Therapeutics

 Development Agreement with Astra AB

   In June 1996 Allelix entered into a collaboration agreement with Astra for
the development and worldwide commercialization of ALXI-11 for the treatment of
osteoporosis. Under the terms of the agreement, Allelix received a non-
refundable license fee of US$5 million in July, 1996, a progress payment of
US$2 million in November, 1996, representing partial reimbursement for its
Phase II clinical trial costs and a milestone payment and reimbursement of
costs of $17.1 million in November, 1997.

                                      I-9
<PAGE>

   In September 1998, Astra terminated its agreement due to a change in
research focus. As a result, all assets were returned to Allelix.

   ALX1-11 Supply Agreement with Chiron Corporation

   In May 1992, Allelix entered into an agreement with Chiron B.V. ("Chiron"),
a Netherlands company and a subsidiary of Chiron Corporation of Emeryville,
California, for the production of clinical grade ALX1-11 at Chiron's GMP plant
in the Netherlands. Chiron is currently producing clinical grade ALX1-11 for
Allelix using Allelix's proprietary protein manufacturing process. To prepare
for Phase II and Phase III clinical trials and commercial production, this
agreement was amended in April 1994 to increase the amount of ALX1-11 supplied
by Chiron and, in May 1996, the term was extended to December 31, 2002. The
agreement requires Chiron to produce ALX1-11 in accordance with FDA and
European Community guidelines for GMP of medicinal compounds. The agreement
provides for minimum annual purchases of bulk ALX1-11 material by Allelix in
each year and may be terminated by Allelix upon payment of a cancellation
penalty of 4.8 million Netherlands Guilders (currently approximately $3.8
million). The Company terminated in December 1998. The agreement provides that
Chiron will not manufacture recombinant human PTH or any related compound for
itself or any third party for 10 years after the termination of the agreement.

 Neuroscience

   Dopamine D4 Receptor Research Agreement with Hoechst Marion Roussel

   Effective January 2, 1995, Allelix entered into a research collaboration
with Hoechst to discover and develop dopamine D4 receptor-specific compounds
for the treatment of antipsychotic disorders, particularly schizophrenia. Under
the terms of this agreement, Hoechst agreed to fund research through to January
1, 1998 up to US$2.3 million per year, extendable to January 2000. In addition,
Allelix could receive up to an additional US$18.0 million if certain research
and development milestones are met. A portion of these milestone payments is
creditable against future royalty payments made by Hoechst to Allelix, if any.
Hoechst could terminate this agreement upon six months notice on or after
January 2, 1998, or at any time if a change of control occurred with respect to
Allelix.

   Pursuant to the terms of the agreement, Hoechst has been granted all rights
in any compounds discovered by Allelix under the research program. If products
are commercialized and sold by Hoechst, the agreement provides for the payment
by Hoechst of royalties to Allelix. Allelix has the right to co-promote
products in Canada and Scandinavia. The Company received approximately $1.0
million from Hoechst under the terms of the agreement in 1998 ($3.4 million in
1997). Hoechst also made a $9.9 million equity investment in Allelix in 1995
and currently owns approximately 6.6% of the Company's outstanding common
shares.

   Pursuant to its option to allow termination of the collaboration on January
2, 1998, Hoechst has elected to do this. Although the scientific collaboration
has fully succeeded in developing D4-selective compounds, the D4-schizophrenia
hypothesis has not yet been proven and the program is judged to be high risk.
Additional preclinical work is therefore in progress in order to determine
possible additional therapeutic indications.

 Research Agreement with Eli Lilly Canada Inc.

   In December 1989, Allelix entered into a research agreement with Eli Lilly
under which scientists from Allelix collaborated with scientists from Lilly
Research Laboratories in Indianapolis to develop a number of proprietary
mammalian cell lines containing human glutamate or EAA receptors. This program
is funded by Eli Lilly and, effective November, 1994, was extended to similar
types of research activities as applied to the NPY class of CNS receptors.
Under the terms of this agreement, Eli Lilly committed to provide Allelix with
up to approximately US$10.7 million in research funding over the four-year term
that commenced in November, 1994. This program has again been renewed
(November, 1998)--EAA for two years, and eating disorders for one year, for
$4.1 million in revenue to Allelix in fiscal 1999. If products are marketed and
sold by Eli Lilly, royalty payments will be paid to Allelix. This program was
extended and expanded twice prior to November,

                                      I-10
<PAGE>

1994. In 1998 and 1997 the Company received approximately $4.1 million and $3.6
million, respectively, from Eli Lilly. Under the terms of the agreement Eli
Lilly also made a US$2.25 million equity investment in Allelix in 1991 and
currently holds approximately 1.8% of the Company's outstanding common shares.

 Limited Partnership with Pharm-Eco Laboratories Inc.

   With respect to commercialization of products which arise from the Limited
Partnership, it is the Limited Partnership's intent to market the treatment for
cocaine abuse within North America (this is commercially and strategically
viable in that this would constitute a defined market accessible with a small
sales force), but license the rights to the rest of the world. A cognitive
enhancement product for the treatment of dementia would be licensed for co-
development and marketing to a large pharmaceutical partner.

   Allelix anticipates that it will fund virtually all of the research and
development costs incurred by the Allelix Pharm-Eco LP and, in this way, will
earn an increasing interest in the Limited Partnership.

Technology Platform

  Research Collaboration with Groupe Fournier

   In August 1994, Allelix entered into a research collaboration agreement with
Groupe Fournier, France to identify and develop new therapies for the treatment
of atherosclerosis, combining Groupe Fournier's knowledge and capabilities in
the lipid field with Allelix's transcription drug discovery technology. The
Company received approximately $1.4 million in each of 1997, 1996 and 1995,
from Groupe Fournier as technology licensing fees and research support
payments. The collaboration was terminated in accordance with the agreement on
October 31, 1997. Fournier is presently evaluating the potential clinical
utility of some of the lead compounds which emerged from this collaboration.

Competition

   The Company competes with numerous entities that develop and produce
products aimed at treating similar conditions to those addressed by the
Company, including early-stage companies, established pharmaceutical companies,
universities, research institutions, governmental agencies and health care
providers. In addition, the Company's product candidates will be required to
compete with existing pharmaceutical products, or products developed in the
future, that are based on established technologies. The Company is subject to
significant competition from industry participants who are pursuing the same or
similar technologies as those which constitute the Company's technology
platforms and from organizations that are pursuing pharmaceutical products or
therapies, or diagnostic products that are competitive with the Company's
product candidates. Many of the Company's competitors have substantially more
financial and other resources, larger research and development staffs, and more
experience and capabilities in researching, developing and testing products in
clinical trials, in obtaining FDA and other regulatory approvals, and in
manufacturing, marketing and distribution than the Company. The Company's
competitors may succeed in developing, obtaining patent protection for,
receiving FDA and other regulatory approvals for, or commercializing products
more rapidly than the Company. In addition, competitive products may be
manufactured and marketed more successfully than the Company's product
candidates.

   The Company is aware of certain pharmaceutical companies that are pursuing
research and development for pharmaceutical products that are aimed at treating
conditions similar to those targeted by the Company's product candidates. In
particular, Merck has introduced the drug Fosamax for the treatment of
osteoporosis in postmenopausal women. If Fosamax enjoys wide clinical
acceptance, the Company's business, financial condition and results of
operations could be materially or adversely affected. At least two other
companies have an ALX1-11-like drug in clinical trials for osteoporosis,
including one in North America/Europe and one in Japan. The Company has no way
of knowing the extent or progress of such competitors' trials. If any such
competitors' trial were to result in regulatory approval to market a competing
PTH the market potential of

                                     I-11
<PAGE>

ALX1-11 could be adversely affected. Moreover, even without such approval, the
announcement of clinical trials of PTH by a significant competitor could result
in a decrease in the market price of the Company's common shares.

   The Company believes that its ability to compete successfully will be based
upon, among other things, its ability to create and maintain scientifically
advanced technology, attract and retain scientific personnel with a broad range
of expertise, obtain patent protection or otherwise develop proprietary
products or processes, enter into collaborative agreements, and, independently
or with its collaborative partners, conduct clinical trials, obtain required
governmental approvals on a timely basis, and through its collaborative
partners or directly, to commercialize its products. See "Risk Factors--Intense
Competition; Rapid Technological Change".

Patents and Trade Secrets

   The Company's success depends, in part, on its ability to obtain patents,
maintain its trade secrets and operate without infringing the proprietary
rights of third parties. The Company attempts to protect any product candidates
and processes developed by it under the intellectual property laws of the
United States, Canada and other major market countries. Allelix employs three
full-time professionals to monitor competitive patent activities and ensure
prompt filings of patent applications. Patent and scientific staff members from
each of the business units work closely together to channel scientific
activities in patentable and non-infringing directions.

   The Company's patent portfolio embraces more than 100 inventions made by
Allelix employees and its collaborators. This has resulted to date in more than
50 U.S. patents; another 85 U.S. patent applications are pending. Of these, 24
patents and 72 filings relate to the Company's business as described in this
Annual Information Form. It is the Company's policy to file counterparts of its
United States applications in various countries around the world, usually in
Canada, Europe and Japan and in other markets where circumstances warrant. The
failure to receive patents in respect of pending applications could have a
material adverse effect on the Company's business, financial condition and
results of operations. See "Risk Factors--Patents and Proprietary Technology".

   The Company's policy in respect of licensing its patents is to generate
revenue by licensing patent rights for applications other than human
therapeutics. If required, Allelix may seek to negotiate licences under
competitive or blocking patents that it believes are required for it to
commercialize its products. See "Risk Factors--Patents and Proprietary
Technology".

   There can be no assurance that the Company's outstanding patent applications
will be allowed, that the Company will develop additional proprietary products
that are patentable, that issued patents will provide the Company with any
competitive advantages or will not be challenged by any third parties, or that
the patents of others will not have an adverse effect on the ability of the
Company to do business. Furthermore, there can be no assurance that others will
not develop independently similar products, duplicate any of the Company's
products or design around the patented products developed by the Company. In
addition, the Company may be required to obtain licences under patents or other
proprietary rights of third parties. No assurance can be given that any licence
required under patents or proprietary rights will be available on terms
acceptable to the Company. If Allelix does not obtain such licences, it or its
collaborative partners could encounter delays in introducing products to the
market while it attempts to design around such patents or proprietary rights,
or could find that the development, manufacture or sale of products requiring
such licences could be foreclosed. In addition, the Company could incur
substantial costs in defending itself in suits brought against Allelix on such
patents or in suits in which the Company attempts to enforce its own patents
against other parties.

 Protein Therapeutics

   The Company is not aware of any competitive patents covering the use of PTH
alone in bone treatment and believes that its patents will enhance its ability
to market its ALX1-11. Some competitive patents covering various formulations,
PTH production systems and combinations of PTH with other compounds are either
granted or pending.

                                     I-12
<PAGE>

   Since PTH is a naturally occurring compound, limited patent protection is
available for recombinant or synthetic forms of PTH or PTH fragments. Patent
protection is available for unique PTH compositions and for processes developed
for the production of highly pure PTH. Highly pure ALX1-11, its formulation and
a cost-effective means for its production are covered by United States patents.
Patents are pending for these inventions in other major markets. The Company's
Australian patent for ALX1-11, having been accepted by that patent office, was
the subject of an opposition proceeding in which a third party challenged grant
of the patent. In a subsequent decision received after transfer of the patent
to Astra, grant of certain claims of the patent was refused. The Company is
considering appeal of that decision. The opponent has recently indicated that
it is withdrawing its action if permitted by the Commissioner of Patents. See
"Risk Factors--Patents and Proprietary Technology".

   The Company's GLP-2 patent portfolio includes patent applications filed in
the United States and internationally for pharmaceutically useful forms and
applications of GLP-2. In addition, Allelix has filed composition of matter
claims for a number of families of GLP-2 analogs, including ALX-0600 and their
use in a variety of intestine-related applications. Patent applications will be
filed internationally for these inventions. The Company is not aware of any
competitive patents or applications that would interfere with its development
program for ALX-0600.

 Neuroscience

   In the dopamine receptor field, Allelix has filed for United States patent
protection on five families of lead compounds, and on receptor cell lines
useful to assay other drug compounds. Other patent applications have also been
filed internationally for these inventions. Allelix has licensed certain
relevant patents owned by the Oregon Health Sciences University. The Company is
aware of other patents in the dopamine receptor field but does not believe that
other patents will affect the Company's current activities or product
candidates.

   Allelix has patents pending in the United States and other major markets for
numerous inventions relating to the human forms of EAA receptors. The Company
is aware of a patent granted in the U.S. to the Salk Institute which describes
certain non-human receptor types and is aware of a patent that has been granted
to Synaptic Pharmaceutical Corporation on a possible NPY feeding receptor. The
Company does not believe that either of these patents will affect the Company's
current activities.

   In the migraine field, the Company, through its relationship with the
Virginia Commonwealth University, has arranged for patent application filings
relating to lead drug compounds. Patent rights for these compounds and all
others arising from research at Virginia are owned by the University and
Allelix has the option to acquire exclusive and worldwide commercialization
rights. While the Company is aware of United States patents and other
applications held by others that cover certain receptor types, the Company does
not believe that these patents impede its on-going activities.

Regulatory Requirements

   The Canadian pharmaceutical industry is regulated primarily by the Health
Protection Branch (the "HPB"), a department of the Government of Canada. This
federal agency is similar to the Food and Drug Administration (the "FDA") in
the United States and is responsible for regulating drugs for both human and
animal use, cosmetics, medical devices, radiation emitting devices, foods and
food additives, chemicals and other products affecting human health. A
manufacturer is required to follow specific GMP regulations in the production
of such products.

   Regulations imposed by federal and local authorities in Canada and the
United States, as well as their counterparts in other countries, are a
significant factor in the conduct of the research, development, manufacturing
and eventual marketing activities for the Company's proposed products. The
regulatory processes in Canada and the United States follow the same essential
steps, although timing and results may be different.

                                     I-13
<PAGE>

   Before testing of any agents with potential therapeutic value in healthy
human test subjects or patients may begin in Canada and the United States,
stringent government requirements for pre-clinical data must be satisfied.
These data, obtained from studies in several animal species as well as from
laboratory studies, are submitted in Canada and the United States in an
Investigational New Drug ("IND") application which must be approved prior to
commencement of clinical studies. These pre-clinical data must provide an
adequate basis for evaluating both the safety and the scientific rationale for
the initial (Phase I) trials in human volunteers.

   Phase I clinical trials commonly are performed in healthy human subjects or,
in rare cases such as the testing of HIV treatments, in selected patients with
the targeted disease or disorder. The goal of these studies is to establish
initial data about tolerance and safety of the drugs in humans. Also, the first
data regarding the absorption, distribution, metabolism and excretion of the
drug in humans are obtained.

   Phase II clinical trials accumulate preliminary evidence about the
pharmacological effects of the drug and the desired therapeutic efficacy in
limited studies with moderate numbers of carefully selected patients with the
target disease or disorder. The goal is to evaluate the effects of various
dosages and to establish an optimal dosage level and dosage schedule.
Additional safety data also are gathered from these studies.

   Phase III clinical trials involve expanded, large-scale studies of patients
with the target disease or disorder to obtain definitive statistical evidence
of the efficacy and safety of the product and dosing regimen. These studies may
include investigation of the effects in sub-populations of patients, such as
the elderly.

   At the same time that the human clinical program is being performed,
additional animal studies are also conducted. Reproductive safety studies are
required to justify enrolling female subjects in their childbearing years.
Extensive toxicity and carcinogenicity studies lasting as long as 24 months are
undertaken to demonstrate the safety of drug administration for the extended
period of time required for effective therapy. A variety of studies are also
performed to establish manufacturing methods for the drug, as well as stable,
effective dosage forms.

   After successful completion of Phase III clinical trials, all data obtained
from this comprehensive development program are submitted as a New Drug
Submission ("NDS") to the HPB in Canada and as a New Drug Application ("NDA")
to the United States FDA, and the corresponding documentation is submitted to
agencies in other countries for review and approval. Essentially, all proposed
products of the Company will be subject to demanding and time-consuming NDS/NDA
and facility approval procedures in most countries where marketing of the
product is intended. The regulations governing these procedures not only define
the form and content of the development of safety and efficacy data regarding
the proposed product, but also impose specific requirements regarding
manufacture of the product, quality assurance, packaging, storage,
documentation and record keeping, labelling, advertising and marketing
procedures.

   To obtain approval, an applicant must submit, as relevant for the particular
product, proof of safety, purity, potency and efficacy. In most cases, such
proof entails extensive pre-clinical testing, clinical testing and laboratory
tests. The testing, preparation of necessary applications and processing of
those applications is expensive and time-consuming and may take several years
to complete. With respect to patented products or technologies, delays imposed
by the government approval process may reduce materially the period during
which the Company will have the exclusive right to exploit these products or
technologies because patent protection lasts for a limited time only, beginning
on the date the patent is first granted in the case of United States patent
applications and on the date the patent application is first filed in the case
of patent applications filed in the European Economic Community and Canada. The
Company seeks to maximize the useful life of its patents under the Patent Term
Restoration Act of 1984 in the United States and under similar laws, if
available, in other countries.

   Among the requirements for product approval is the requirement that
prospective manufacturers conform to the FDA's and HPB's current GMP standards
which, thereafter, must be followed at all times. In complying with GMP
standards, manufacturers must continue to expend time, money and effort in
production, record

                                     I-14
<PAGE>

keeping and quality control. Continued compliance with all requirements of the
applicable legislation and the conditions in an approved application, including
but not limited to product specification, manufacturing process, labelling,
promotional material, and record keeping and reporting requirements, is
necessary for all products. Failure to comply, or the occurrence of
unanticipated, adverse effects during commercial marketing, could lead to the
need for product recall, or regulator-initiated action such as the suspension
of manufacturing or seizure of the product, which could delay further marketing
until the products are brought into compliance. The regulator may also request
a voluntary recall of a product.

   The process of obtaining regulatory approvals for clinical trials or for the
manufacturing or marketing of the Company's potential products is costly, time-
consuming and subject to unanticipated delays. The approval process varies from
country to country and approval for sale in one country may facilitate, but
does not ensure, approvals in other countries. Delays in obtaining regulatory
approvals by the Company or its collaborators would adversely affect the
development, testing and marketing of the Company's products. There can be no
assurance that any product candidates will prove to be safe and effective in
clinical trials or that the Company will obtain regulatory approvals for its
products in a timely manner, or at all. Even if regulatory approval of a
potential product is obtained, such approval may entail limitations on the
indicated use for which such product may be marketed and these limitations may
restrict the patient population for which such product may be prescribed. Later
discovery of previously unknown defects or failure to comply with applicable
regulatory requirements may result in restrictions on marketing or withdrawal
from the market, as well as possible civil or criminal sanctions. See "Risk
Factors--Government Regulation; No Assurance of Regulatory Approval".

Manufacturing

   The Company currently produces material at its premises for pre-clinical
testing. In addition, other material is obtained from contract production
firms. For certain pre-clinical tests and clinical trials, material must be
manufactured under GMP. As the Company does not presently meet GMP
requirements, materials for pre-clinical testing and clinical trials are
obtained through contracts with contract production firms. For example, in the
protein therapeutics area, Allelix has developed and implemented a production
process for recombinant therapeutic proteins such as ALX1-11. Allelix has
developed a proprietary production process whereby ALX1-11 is produced by
fermentation in accordance with GMP. Clinical grade ALX1-11 was produced by
Chiron in accordance with the production specifications developed by Allelix.

   The Company is currently reviewing alternatives to meet current and planned
manufacturing needs for ALX1-11 including, for example, the possible
acquisition, leasing or participation in the construction of a GMP facility.
The decision to proceed with these or any other such alternatives will be
determined through a cost-benefit analysis of constructing a GMP facility,
compared to contract manufacture and with due consideration for competitive
implications.

Employees

   As of December 31, 1998, Allelix had 168 full time employees. Approximately
132 individuals are employed in the research and development activities of the
Company, with 52 holding Ph.D. degrees. As a group, these employees represent
skills in molecular biology, receptor technology, biochemical pharmacology,
synthetic organic chemistry, computational chemistry and manufacturing process
development. Approximately 36 of Allelix's employees are involved in managerial
and administrative functions at the Company's offices in Mississauga, Ontario
and Cranbury, New Jersey.

Premises

   The Company's main facilities are located at 6850 Goreway Drive, in
Mississauga, Ontario. The Company leases a 9,000 square metre (90,000 square
foot) building custom built as a biotechnology research and development
facility. The facility includes offices, biology and chemical research
laboratories and fermentation operations. The Company's subsidiary leases 1,700
square metres (17,000 square feet) of research laboratories and office space in
Cranbury, New Jersey.

                                     I-15
<PAGE>

Risk Factors

 Early Stage of Product Development; Technological Uncertainty

   The Company currently has no commercial products and all of its product
candidates are in research, development or clinical trials. As such, the
Company cannot predict when or if any of its product candidates under
development will be commercialized. Products, if any, resulting from the
Company's research and development programs are not expected to be commercially
available for a number of years, if at all, even if they are successfully
developed and proven safe and effective. The Company has a limited relevant
operating history upon which an evaluation of its prospects can be made. Such
prospects must be considered in light of the risks, expenses and difficulties
frequently encountered in establishing a business in the evolving, heavily
regulated pharmaceutical industry, which is characterized by an increasing
number of market entrants, intense competition and a high failure rate. In
addition, significant challenges are often encountered in shifting from
development to commercialization of new products.

   The Company has devoted substantial efforts to the development of ALX1-11,
for the treatment of osteoporosis. Product candidates that appear to be
promising at early stages of development may not reach the market for a number
of reasons. There can be no assurance that ALX1-11 will receive the necessary
regulatory approvals, prove to be safe and effective, be capable of being
produced in commercial quantities at acceptable cost, be protected from the
proprietary rights of third parties or be successfully marketed by the Company
or a partner. The failure of ALX1-11 to achieve any of the foregoing would have
a material adverse effect on the Company's business, financial condition and
results of operations.

 History of Net Losses and Uncertainty of Future Operating Results

   To date, the Company has not generated sufficient revenues to offset its
research and development costs and accordingly, has not made an operating
profit. The Company's accumulated deficit as at August 31, 1998 was
$83,745,000. During the year ended 1998, the Company incurred a net loss of
$21,764,000 and for the fiscal years ended 1997, 1996 and 1995, the net losses
were: $15,953,000, $6,779,000 and 12,759,000, respectively. See "Selected
Consolidated Information". While Allelix has historically benefited from the
inclusion of government grants and funds for research collaboration projects in
its annual revenue, there can be no assurance that either government grants or
research collaboration payments will continue to be available to the Company
or, if so, at what levels. There can be no assurance that the Company will ever
achieve significant revenues or profitable operations. The Company expects to
incur additional operating losses over the next few years as the Company's
research and development efforts and pre-clinical testing are expanded and
clinical trials are continued. The Company's ability to achieve profitability
depends on its ability, alone or with others, to select successfully
therapeutic compounds for development, to obtain the required regulatory
consents and to manufacture and market any resulting products.

 Liquidity and Capital Needs

   Although the Company's future capital requirements will depend on many
factors, including continued scientific progress in its drug discovery and
development programs, progress in its pre-clinical testing and clinical trials
of product candidates, time and expense associated with filing, prosecuting and
enforcing its patent claims, and costs associated with obtaining regulatory
approvals, the Company anticipates needing additional capital to meet its
business plan. In order to meet such capital requirements, the Company will
consider contract fees, collaborative research and development agreements, and
additional public or private financing (including the issuance of additional
equity securities). There can be no assurance that additional funding will be
available or, if available, that it will be available on terms acceptable to
the Company. If adequate funds are not available, the Company may have to
reduce substantially or eliminate expenditures for research and development,
testing, production and marketing of its product candidates, or obtain funds
through further agreements with corporate partners that require the Company to
relinquish rights to certain of its technologies or products. There can be no
assurance that the Company will be able to raise additional capital if its
capital resources are exhausted.

                                     I-16
<PAGE>

   Generally, the Company's funding pursuant to any particular collaborative
research agreement is subject to reduction or termination under various
circumstances. There can be no assurance that scheduled payments will be made
by third parties, that current agreements will not be cancelled, that
government research grants will continue to be received at current levels or
that unanticipated events requiring the expenditure of funds will not occur.
There can be no assurance that the Company's cash reserves and other liquid
assets, including funding that may be received from the Company's collaborative
partners and interest income earned thereon, will be adequate to satisfy its
capital and operating requirements for the foreseeable future.

 Dependence on Strategic Alliances

   The Company has collaborative agreements and/or joint ventures with certain
established pharmaceutical companies for the development, regulatory approval
and marketing of certain of its product candidates. The Company has granted to
its collaborative and/or joint venture partners rights to license and
commercialize the products developed under these agreements and, in some
instances, proprietary rights, and such rights will limit the Company's
flexibility in considering alternatives for the commercialization of such
product candidates. Under its agreements, the Company is relying on its
collaborative and/or joint venture partners to assist or conduct research
efforts, pre-clinical testing and clinical trials, to assist in obtaining
regulatory approvals and to market certain of the Company's product candidates.
Although the Company believes that its collaborative and/or joint venture
partners will have an economic motivation to commercialize the product
candidates which they may licence, the amount and timing of resources devoted
to these activities will be largely controlled by each partner. There can be no
assurance that the strategic partners will continue to perform their
obligations under these agreements, that they will be successful in their
clinical trials or in receiving the necessary regulatory approvals for the
products or that they will be successful in marketing and distributing the
products if regulatory approvals are received. The failure of the strategic
partners to perform any such obligations or to be successful in marketing and
distributing the products, if any, would have a material adverse effect on the
Company's business, financial condition and results of operations. Furthermore,
there can be no assurance that business conflicts will not arise between the
strategic partners or between the Company and the strategic partners. In
addition, each of Allelix's collaborative and/or joint venture agreements
contain termination provisions in favour of the Company's strategic partner. If
any of the Company's collaborative partners terminates or breaches its
agreement with the Company, or fails to devote the necessary resources to the
project, the project subject to the agreement would be materially adversely
affected, and such actions would have a material adverse effect on the
Company's business, financial condition and results of operation.

   Generally, in its collaborative agreements, the Company agrees not to
conduct independently, or with any third party, any research that competes with
the research conducted under its collaborative programs. The Company's
collaborative relationships may limit the areas of research the Company may
pursue. However, the Company's collaborative partners may develop, either alone
or with others, products that are similar to or competitive with the product
candidates that are the subject of the Company's collaborations with such
partners. Competing products, either developed by the collaborative partners or
to which the collaborative partners have rights, may result in the withdrawal
of such partners' support for the Company's product candidates. This outcome
would have a material adverse effect on the Company's business, financial
condition and results of operations.

   The Company's strategy for the discovery, pre-clinical testing, clinical
trials, manufacturing and marketing of certain of its product candidates
includes establishing additional collaborations. There can be no assurance that
the Company will be able to negotiate such collaborative agreements on
acceptable terms, if at all, or that such collaborations will be successful.
See "Collaboration Agreements".

 Patents and Proprietary Technology

   The Company's success will depend, in part, on its ability to obtain
patents, maintain trade secret protection and operate without infringing the
proprietary rights of third parties, both in the United States and in

                                     I-17
<PAGE>

other countries. The failure of the Company or its licensors to obtain and
maintain patent protection for the Company's technology could have a material
adverse effect on the Company. The Company has been issued a number of patents
in the United States and has filed numerous applications for patents in the
United States and other jurisdictions. The patent positions of pharmaceutical
and biotechnology firms, including the Company, are uncertain and involve
complex legal and factual questions for which important legal principles are
largely unresolved, particularly in regard to methods for treating or
preventing human diseases. Substantial periods of time pass before the United
States Patent & Trademark Office ("USPTO") responds on the merits to patent
applications and submissions on behalf of the inventors. In addition, the
coverage originally claimed in a patent application can be significantly
reduced or modified before and after a patent is issued. There can be no
assurance that the Company's outstanding patent applications will be allowed,
that the Company will develop additional proprietary products that are
patentable, that issued patents will provide the Company with any competitive
advantages or will not be challenged by any third parties, or that the patents
of others will not have an adverse effect on the ability of the Company to do
business. Patent applications in the United States are maintained in secrecy
until patents are issued, and patent applications in certain other countries
generally are not published until more than 18 months after they are filed. In
addition, publication of scientific or patent literature often lags behind
actual discoveries. As a result, the Company cannot be certain that it or any
of its licensors was the first to invent the subject matter covered by the
Company's or its licensors' pending patent applications or that the Company or
its licensors were the first to file such applications. In addition, the
Company may be required to obtain licences under patents or other proprietary
rights of third parties. No assurance can be given that any licences required
under any such patents or proprietary rights will be available on terms
acceptable to the Company. If Allelix does not obtain such licences, it or its
collaborators could encounter delays in introducing products to the market
while it attempts to design around such patents or proprietary rights, or could
find that the development, manufacture or sale of products requiring such
licences could be foreclosed. In addition, the Company could incur substantial
costs in defending itself in suits brought against Allelix on such patents or
in suits in which the Company attempts to enforce its own patents against other
parties.

   There can be no assurance that the Company's or licensors' patents, if
issued, would not be found invalid or unenforceable by a court or that such
patents would not cover products or technologies of the Company's competitors.
Competitors or potential competitors may have filed applications or received
patents, and may obtain additional patents and proprietary rights relating to
products or methods for treating or preventing human disease that are
competitive with those of the Company. To protect its proprietary rights, the
Company may be required to participate in interference proceedings declared by
the USPTO to determine priority of invention, which could result in substantial
cost to the Company. Moreover, even if the Company's or licensors' patents
issue, there can be no assurance that such patents will provide sufficient
proprietary protection or will not be later limited, circumvented or
invalidated.

   There is substantial uncertainty whether human clinical data will be
required for the issuance of patents for methods of treating or preventing
human disease. If such data are required, the Company's ability to obtain
patent protection could be delayed or otherwise adversely affected. Although
the USPTO issued new utility guidelines in July 1995 that address the
requirements for demonstrating utility for biotechnology inventions, including
inventions relating to methods for treating or preventing human diseases, there
can be no assurance that USPTO patent examiners will follow such guidelines or
that the USPTO's position will not change with respect to what is required to
establish utility for future potential products of the Company in the treatment
of human diseases. Nor can it be assured that compliance with such guidelines
will result in patents that are valid and enforceable. Furthermore, the
enactment of legislation implementing the General Agreement on Trade and
Tariffs has resulted in certain changes to United States patent laws that
became effective on June 8, 1995. Most notably, the term of patents that issue
from patent applications filed on or after June 8, 1995 is no longer a period
of 17 years from the date of grant. The new term of United States patents will
commence on the date of issuance and terminate 20 years from the earliest
claimed filing date of the application. Because the time from filing to
issuance of biotechnology patent applications is often more than three years, a
20-year term from the claimed date of filing may result in a substantially
shortened term of patent protection, which may adversely

                                     I-18
<PAGE>

impact the Company's patent position. In addition, if this change results in a
shorter period of patent coverage, and if the Company negotiates royalties
based on the existence of valid patents, there could be an adverse effect on
the Company's business, financial condition and results of operation.

   The Company is currently involved in an opposition proceeding in Australia
relating to ALX1-11 in which certain claims of the grant of one of its
Australian patents have been challenged. The Company understands that a
decision against grant of the patent has been received. The Company is
considering an appeal of that decision. The opponent has recently indicated
that it is withdrawing its action if permitted by the Commissioner of Patents.
This patent has been issued in the United States and Japan.

   The Company also relies upon unpatented proprietary technology. The Company
relies on proprietary know-how and confidential information and employs various
methods, such as entering into confidentiality and non-competition agreements
with its current employees and with third parties to whom it divulges
proprietary information, to protect the processes, concepts, ideas and
documentation associated with its technologies. Such methods may afford
incomplete protection, and there can be no assurance that the Company will be
able to protect adequately its trade secrets or that other companies will not
acquire or independently develop information that the Company considers to be
proprietary. The inability to maintain its trade secrets for its exclusive use
could have a material adverse effect on the Company's business, financial
condition and results of operations. See "Patents and Trade Secrets".

 Government Regulation; No Assurance of Regulatory Approval

   Prior to marketing by a collaborative partner, any new drug compound
discovered by the Company must undergo an extensive regulatory process in
Canada, the United States and other countries. The process of obtaining
regulatory approvals for clinical trials or for the manufacturing or marketing
of the Company's product candidates is costly, time-consuming and subject to
unanticipated delays. Prior to marketing in the United States, a product
candidate must undergo extensive pre-clinical testing and clinical trials to
satisfy the FDA that the product candidate is safe and efficacious in each
clinical indication (the specific condition intended to be treated), dosage,
dose schedule and route of administration for which approval for use is sought.
In addition, approval by analogous regulatory authorities in other countries
must be obtained prior to commencing marketing of pharmaceutical products in
those countries. Data obtained from pre-clinical testing and clinical trials
are susceptible to varying interpretations that could delay, limit or prevent
regulatory approval. In addition, delays or rejections may be encountered based
upon changes in FDA policies for drug approval during the period of product
development and FDA regulatory review of each submitted new drug application.
The approval process varies from country to country and approval for sale in
one country may facilitate, but does not ensure, approval in other countries.
Delays in obtaining regulatory approvals would adversely affect the
development, testing and marketing of the Company's product candidates. There
can be no assurance that any product candidates will prove to be safe and
effective in clinical trials or that the Company or its collaborators will
obtain regulatory approvals for its product candidates in a timely manner, or
at all. Even if regulatory approval of a product candidate is obtained, such
approval may entail limitations on the indicated uses for which such product
candidate may be marketed and these limitations may restrict the patient
population for which such product may be prescribed. Later discovery of
previously unknown defects or failure to comply with applicable regulatory
requirements may result in restrictions on marketing or withdrawal from the
market, as well as possible civil or criminal sanctions.

   To commercialize any product and prior to submitting the application for
marketing approval in the United States, the Company must sponsor and file an
IND for each proposed product candidate and must be responsible for initiating
and overseeing the clinical trials to demonstrate the safety and efficacy that
are necessary to obtain FDA approval of such product candidate. None of the
Company's product candidates has been approved for commercialization in Canada,
the United States or elsewhere. After completion of clinical trials of a
product candidate, marketing approval must be obtained from the FDA before
marketing can occur in the United States. At that time, the Company or its
collaborators must submit relevant data, including the

                                     I-19
<PAGE>

results of product candidate development activities, pre-clinical testing and
clinical trials, in addition to detailed manufacturing information.
Notwithstanding the submission of relevant data, the FDA may withhold marketing
approval and may require additional clinical trials. All manufacturing
operations are also subject to the FDA's current GMP requirements on an ongoing
basis. There can be no assurance that the Company or its collaborators will be
able to attain or maintain compliance with GMP requirements. The Company is
subject to similar regulation by governmental authorities in other
jurisdictions, including Canada. Failure to obtain regulatory approvals for its
product candidates or to either attain or maintain compliance with GMP
requirements would have a material adverse effect on the Company's business,
financial condition and results of operations. See "Regulatory Requirements".

 Intense Competition; Rapid Technological Change

   The Company competes with numerous entities that develop and produce
products aimed at treating similar conditions to those treated by the Company,
including early-stage companies, established pharmaceutical companies,
universities, research institutions, governmental agencies and health care
providers. In addition, the Company's product candidates will be required to
compete with existing pharmaceutical products, or products developed in the
future, that are based on established technologies. The Company is subject to
significant competition from industry participants who are pursuing the same or
similar technologies as those which constitute the Company's technology
platform and from organizations that are pursuing pharmaceutical products or
therapies, or diagnostic products that are competitive with the Company's
product candidates. Many of the Company's competitors have substantially more
financial and other resources, larger research and development staffs, and more
experience and capabilities in researching, developing and testing products in
clinical trials, in obtaining FDA and other regulatory approvals, and in
manufacturing, marketing and distribution than the Company. The Company's
competitors may succeed in developing, obtaining patent protection for,
receiving FDA and other regulatory approvals for, or commercializing products
more rapidly than the Company.

   The Company is aware of certain pharmaceutical companies that are pursuing
research and development for pharmaceutical products that are aimed at treating
conditions similar to those targeted by the Company's product candidates. In
particular, Merck has introduced the drug Fosamax for the treatment of
osteoporosis in postmenopausal women. If Fosamax enjoys wide clinical
acceptance, the Company's business, financial condition and results of
operations could be materially or adversely affected. The Company is aware of
at least two companies that are engaged in clinical trials of PTH for
osteoporosis. The Company has no way of knowing the extent or progress of such
trials. If any such trial were to result in regulatory approval to market a
competing PTH prior to the Company receiving approval to market ALX1-11, the
marketing of ALX1-11 would be more difficult and the Company's business,
financial condition and results of operations could be materially adversely
affected. Moreover, even without such approval, the announcement of clinical
trials of PTH by a significant competitor could result in a decrease in the
market price of the Company's common shares. In addition, Synaptic
Pharmaceutical Corporation is currently conducting a drug discovery program
with Ciba-Geigy Limited on the NPY family of receptors to identify and develop
NPY receptor subtype-specific drugs for the treatment of obesity. Should
competitors of the Company receive the necessary approval for commercial
marketing of a product and receive market acceptance for such product, there
could be a material adverse effect on the Company's business, financial
condition and results of operations. The Company also competes with others in
acquiring products from research institutions and universities. The Company's
competitors may develop new technologies and products that are available for
sale prior to the Company's product candidates or that are more effective than
the Company's product candidates are. In addition, competitive products may be
manufactured and marketed more successfully than the Company's product
candidates. Such developments could render the Company's product candidates
less competitive or obsolete, and could have a material adverse effect on the
Company's business, financial condition and results of operations.

                                     I-20
<PAGE>

   The Company will, for the foreseeable future, rely on its collaborative
partners for Phase III clinical trials of its product candidates and
manufacturing and marketing of any products. In addition, the Company relies
on its collaborative partners for support in its drug discovery operations. It
is likely that all of the pharmaceutical companies with which the Company has
collaborations are conducting multiple product development efforts within each
disease area. Generally, the Company's collaborative research agreements do
not restrict a party from pursuing competing internal development efforts
based on reasonable commercial judgement and other factors. Any product
candidate of the Company, therefore, may be in competition with a product
candidate of the pharmaceutical company with which the Company is
collaborating.

   Biotechnology and related pharmaceutical technology have undergone rapid
and significant change. The Company expects the technology associated with the
Company's future success to depend, in large part, on its ability to maintain
a competitive position with respect to this technology. Rapid technological
development by the Company or others may result in its product candidates or
processes becoming obsolete before the Company recovers any expenses it incurs
in connection with developing such products or processes. See "Competition".

 No Assurance of Market Acceptance; Uncertainties Related to Pharmaceutical
 Pricing and Reimbursement

   There can be no assurance that products, if any, successfully developed by
the Company, if approved for marketing, will achieve market acceptance. The
product candidates that the Company is attempting to develop will compete with
a number of drugs and therapies marketed and manufactured by pharmaceutical
companies, as well as products currently under development by such companies
and others. The degree of market acceptance of products developed by the
Company, if any, will depend on a number of factors, including the
establishment and demonstration in the medical community of the clinical
efficacy and safety of the Company's products, their potential advantage over
alternative treatment methods and the reimbursement policies of government and
third party payors. There is no assurance that physicians, patients or the
medical community in general will accept and utilize any products that may be
developed by the Company.

   Sales of the Company's approved products, if any, will depend on the
availability of reimbursement from third party payors such as governmental
health administration authorities, private health insurers, health maintenance
organizations, pharmacy benefit management companies and other organizations.
Both federal and state governments in the United States and foreign
governments continue to propose and pass legislation designed to contain or
reduce the cost of health care through various means. Legislation and
regulations affecting the pricing of pharmaceuticals and other medical
products may change or be adopted before any of the Company's potential
products is approved for marketing. Cost control initiatives could decrease
the price that the Company or its collaborators receive for a product and
could have a material adverse effect on the Company's business, financial
condition or results of operations. Further, to the extent that cost control
initiatives have a material adverse effect on the Company's collaborative
partners, the ability to commercialize products developed through the
collaboration and accordingly, the Company's ability to receive royalty
payments based on the sale of such products may be adversely affected. In
addition, third party payors increasingly are challenging the price and cost-
effectiveness of medical products and services. Significant uncertainty exists
as to the reimbursement status of newly approved health care products,
including pharmaceuticals. Government and other third party payors
increasingly are attempting to contain health care costs by limiting both
coverage and reimbursement for uses of approved products for disease
indications for which the FDA has not granted labelling approval. If adequate
coverage and reimbursement levels are not provided by government and other
third party payors for the Company's products, the market acceptance of these
products will be adversely affected which would have a material adverse effect
on the Company's business, financial condition and results of operations.

 No Manufacturing Capacity; Reliance on Third Party Manufacturing

   The Company currently does not have facilities for the manufacture of
product candidates for clinical trials or commercial purposes, and has been,
and expects to remain, dependent on its collaborative partners or

                                     I-21
<PAGE>

third parties for the manufacture of product candidates for pre-clinical
testing, clinical trials and commercial purposes. There can be no assurance
that the Company will be able to enter into any necessary third party
manufacturing agreements on acceptable terms, if at all.

   The manufacture of the Company's product candidates for clinical trials and
the manufacture of resulting products for commercial purposes are subject to
regulations promulgated by the FDA. The Company currently relies on and may
continue to rely on collaborative partners or outside contractors to
manufacture its products in GMP facilities. The Company's products, if any, may
be in competition with other products for priority of access to these
facilities. There can be no assurance that the Company's collaborative partners
or third party manufacturers will manufacture such products in an effective or
timely manner. If not performed in a timely manner, the clinical trials of the
Company's product candidates or such product candidates' submissions for
regulatory approval could be delayed and the Company's ability to deliver
products on a timely basis could be impaired or precluded. The Company's
current dependence upon others for the manufacture of its products may affect
adversely its ability to commercialize approved products, if any, on a timely
and competitive basis.

 Dependence on Key Employees and Scientific Collaborators

   The Company is highly dependent on the principal members of its management
and scientific staff as well as its advisors and scientific collaborators, the
loss of whose services might impede the achievement of development objectives.
There can be no assurance that the Company will be successful in retaining its
existing personnel or advisors, or in attracting additional qualified
employees. The failure to attract and retain such personnel or the loss of
existing personnel could have a material adverse effect on the Company's
business, financial condition and results of operations. The Company's ability
to develop product candidates will depend, to a great extent, on its ability to
attract and retain highly qualified scientific personnel and to develop and
maintain existing relationships with leading research institutions. Competition
among biotechnology and pharmaceutical companies for such personnel and
relationships is intense.

   The Company also depends on the continued availability of outside scientific
collaborators who perform research, which may be funded by the Company, in
certain areas relevant to the Company's research. There can be no assurance
that the Company will be able to negotiate such collaborative agreements on
acceptable terms, if at all, or that such collaborations will be successful.
The Company's scientific collaborators are not employees of the Company and
generally may terminate their relationship with the Company at any time. In
addition, certain of the Company's scientific collaborators have consulting or
advisory relationships with other entities that may conflict with their
obligations to the Company. As a result, the Company has limited control over
their activities and can expect that only limited amounts of their time will be
dedicated to Company activities. For these reasons, there can be no assurance
that inventions or processes developed by the Company's scientific
collaborators will become the property of the Company. Although certain of the
Company's scientific collaborators have agreed not to engage in activities that
would involve a conflict of interest with the Company, there can be no
assurance that such conflicts of interest will not occur.

 Product Liability and Insurance

   The sale and use of product candidates under development by the Company and
its collaborative partners may entail risk of product liability. The Company
has obtained product liability insurance in the amount of $20 million for its
product candidates in clinical trials; however, there is no way to determine
the adequacy of such insurance coverage. In addition, as the Company expands,
there can be no assurances that it will be able to obtain appropriate levels of
product liability insurance prior to any use of the product candidates
discovered and developed by the Company and its collaborative partners in
clinical trials or offered for commercial sale. An inability to obtain
insurance on commercially reasonable terms or otherwise to protect against
potential product liability claims could inhibit or prevent the
commercialization of such products or expose the Company to significant product
liability risks following commercialization. The obligation to pay any product
liability claim or a recall of a product could have a material adverse effect
on the Company's business, financial condition and results of operations.

                                     I-22
<PAGE>

 Hazardous Material; Environmental Matters

   The Company's research and development activities involve the controlled use
of hazardous materials, chemicals, biological materials and radioactive
compounds. The Company is subject to federal, provincial, state and local laws
and regulations governing the use, manufacture, storage, handling and disposal
of such materials and certain waste products. Although the Company believes
that its safety procedures for handling and disposing of such materials comply
with the standards prescribed by such laws and regulations, the risk of
accidental contamination or injury from these materials cannot be completely
eliminated. In the event of such an accident, the Company could be held liable
for any resulting damages and any such liability could exceed the Company's
resources. There can be no assurance that the Company will not be required to
incur significant costs to comply with environmental laws and regulations in
the future.

 Volatility of Share Price; Absence of Dividends

   Since its initial public offering in Canada in 1991, the market price of the
Company's common shares on The Toronto Stock Exchange has fluctuated
significantly. During that time, the stock market has also fluctuated
significantly in terms of price and volume. Stock market fluctuations are often
unrelated to the operating performance of particular companies. In addition,
market prices for securities of biotechnology companies generally are subject
to wide fluctuations in response to factors such as: announcements (through
news media or at scientific conferences) of technological innovations, new
commercial products and patents; the development of proprietary rights by the
Company or its competitors, results of clinical trials and regulatory actions;
actual or anticipated variations in the Company's operating results due to a
number of factors including, among others, the level of development expenses,
changes in financial estimates by securities analysts, and conditions and
trends in pharmaceutical, biotechnology and other industries; the adoption of
new accounting standards affecting the industry; general market conditions; and
other factors. As a result, it is possible that the Company's operating results
will be below the expectations of market analysts and investors, which likely
would have an adverse effect on the prevailing market price of the Company's
common shares. The prevailing market price of the Company's common shares may
also be adversely affected by public concern over the safety of biotechnology
and future sales of the Company's common shares by current shareholders.

   The Company has never paid cash dividends on its common shares and does not
anticipate paying cash dividends in the foreseeable future.

 Currency Risk

   A significant amount of the Company's revenues are received and expenses are
incurred in U.S. dollars while the Company reports its financial results in
Canadian dollars. Accordingly, large fluctuations in the exchange rate between
the Canadian dollar and the U.S. dollar could have a material effect on the
Company's reported results. The exchange rate between the Canadian and U.S.
dollars has varied substantially during the last three years. To date, the
Company has not engaged in exchange rate hedging activities.

Selected Consolidated Financial Information

   Revenues for the first quarter of 1998 ended November 30, 1997 include a
milestone payment and the reimbursement of certain Phase II clinical trial
costs by Astra AB totalling $17.1 million. Revenues for the first quarter of
1997 include a progress payment of $2.7 million from Astra. Revenues in the
third and fourth quarters of 1998 were lower than previous quarters as a result
of the elimination of research support payments from Hoechst Marion Roussel on
January 1, 1998.

   Expenses and net loss (excluding the impact of the payments from Astra)
increased in the fourth quarter of 1997 as a result of the acquisition of
Allelix Neuroscience Inc. and the resulting increase in amortization expense of
$3.0 million per quarter.

                                     I-23
<PAGE>

<TABLE>
<CAPTION>
Years ended August 31                     1998   1997   1996    1995     1994
- ---------------------                    ------ ------ ------  -------  -------
<S>                                      <C>    <C>    <C>     <C>      <C>
Total revenues ($000s).................. 29,915 17,468 19,953   10,004    5,819
Net loss for the year ($000s)........... 21,764 15,953  6,779   12,760   10,818
Loss per share ($)......................   1.21   1.11   0.57     1.20     1.29
Total assets ($000s).................... 77,628 95,764 47,601   30,483   31,387
<CAPTION>
Fiscal 1998                                       Q1     Q2      Q3       Q4
- -----------                                     ------ ------  -------  -------
<S>                                      <C>    <C>    <C>     <C>      <C>
Total revenues ($000s)......................... 20,759  3,608    2,745    2,803
Net income (loss) for the quarter ($000s)......  8,393 (8,609) (10,869) (10,679)
Net income (loss) per share ($)................   0.47  (0.48)   (0.60)   (0.59)
<CAPTION>
Fiscal 1997
- -----------
<S>                                      <C>    <C>    <C>     <C>      <C>
Total revenues ($000s).........................  6,366  3,503    3,676    3,923
Loss for the quarter ($000s)...................    955  4,765    3,381    6,852
Loss per share ($).............................   0.07   0.36     0.22     0.43
</TABLE>

Dividend Record and Policy

   Allelix has not declared or paid any dividends in the past five years nor
does it intend to pay dividends on the common or preferred shares in the
foreseeable future. The Company currently intends to retain any earnings to
finance the growth of the Company's business and to expand its research and
product development activities. Any future declaration and payment of dividends
will be in the discretion of the Company's Board of Directors and subject to
applicable law and will depend upon the Company's result of operations,
financial condition, contractual limitations, cash requirements, future
prospects and other matters deemed relevant by the Board of Directors.

Management's Discussion and Analysis of Operating Results

   Reference is made to Management's Discussion and Analysis of Operating
Results ("MD&A") which accompanies the Company's financial statements contained
in the Annual Report which MD&A is hereby incorporated by reference.

Market for Securities

   The common shares of Allelix are publicly traded on the Montreal and The
Toronto stock exchanges under the trading symbol AXB.

Directors and Officers

<TABLE>
<CAPTION>
                                                                      Director/Officer
     Name/Residence          Position        Principal Occupation          Since
     --------------      ----------------  ------------------------   ----------------
 <C>                     <C>               <S>                        <C>
 Digby Barrios(2)......  Director          Pharmaceutical Industry          1993
  Ridgefield,                              Consultant since 1992,
  Connecticut                              prior thereto,
                                           President, Boehringer
                                           Ingelheim Corporation (a
                                           pharmaceutical company)

 George E.                                 President Emeritus,              1995
  Connell(1)(2)........  Director          University of Toronto
  Toronto, Ontario

 William Crouse........  Director          Managing Director,               1997
  Princeton, NJ                            HealthCare Ventures
                                           L.L.C.

 John R. Evans,                            Chairman of Allelix              1983
  M.D.(1)..............  Director
  Toronto, Ontario
</TABLE>

                                     I-24
<PAGE>

<TABLE>

<CAPTION>
                                                                      Director/Officer
     Name/Residence          Position        Principal Occupation          Since
     --------------      ----------------  ------------------------   ----------------
 <C>                     <C>               <S>                        <C>
 Irving S. Johnson,                        Biomedical Research              1992
  Ph.D.................  Director          Consultant since 1988,
  Sanibel Island,                          prior thereto, Vice
  Florida                                  President, Research, Eli
                                           Lilly & Co., ( a
                                           pharmaceutical company)

 Edward Rygiel(1)(2)...  Director          President & Chief                1989
  Toronto, Ontario                         Executive Officer, MDS
                                           Capital Corp., (a
                                           venture capital
                                           corporation)

 Nelson Sims(1)........  Director          President, Eli Lilly             1995
  Toronto, Ontario                         Canada Inc.

 Graham Strachan.......  Director,         President and Chief              1989
  Toronto, Ontario       President and     Executive Officer of
                         Chief Executive   Allelix
                         Officer

 John Dietrich, Ph.D...  Senior Vice       Vice President, Research         1991
  Toronto, Ontario       President,        and Development of
                         Research and      Allelix; prior thereto,
                         Development       Vice President,
                                           Research, Chemex
                                           Pharmaceuticals Inc.

 James Howard-Tripp....  Senior Vice       Vice President, Business         1996
  Burlington, Ontario    President,        Development, prior
                         Business          thereto, Vice President,
                         Development       Business Development,
                                           Wyeth-Ayerst.

 Paul J. Van Damme.....  Vice President,   Prior to Allelix, Vice           1997
  Toronto, Ontario       Finance, Chief    President, Finance and
                         Financial         Chief Financial Officer,
                         Officer and       GlycoDesign Inc.
                         Corporate
                         Secretary
</TABLE>
- --------
(1) Member of Compensation Committee
(2) Member of Audit Committee Directors and officers of the Company controlled
    either directly or indirectly approximately 4.5% of the outstanding common
    shares of the Company as at fiscal 1998 year-end. In addition, HealthCare
    Ventures L.L.C., of which Mr. Crouse is a senior officer, owned 1,432,611
    of Allelix's shares, MDS Capital Corp., of which Mr. Rygiel is a senior
    officer, owned 200,194, and Eli Lilly Canada Inc., of which Mr. Sims is a
    senior officer, owned 333,334.

Additional Information

   Upon request being made by any person to the Corporate Secretary of the
Company, the Company shall provide to that person the following:

     (a) when the securities of the Company are in the course of a
  distribution pursuant to a short form prospectus or a preliminary short
  form prospectus has been filed in respect of the distribution of its
  securities,

       (i) one copy of this Annual Information Form, together with one copy
    of any document or the pertinent pages of any document incorporated by
    reference therein;

       (ii) one copy of the Company's comparative consolidated financial
    statements for its most recently completed financial year, together
    with the accompanying report of the auditor, and one copy of any
    interim consolidated financial statements of the Company subsequent to
    the consolidated financial statements for the most recently completed
    financial year;

                                     I-25
<PAGE>

       (iii) one copy of the Management Proxy Circular of the Company in
    respect of its most recent annual meeting of shareholders that involved
    the election of directors; and

       (iv) one copy of any other documents that are incorporated by
    reference into the preliminary short form prospectus or the short form
    prospectus and are not required to be provided under (i) to (iii)
    above; or

     (b) at any other time, one copy of any other documents referred to in
  (a) (i), (ii) and (iii) above. The Company may require the payment of a
  reasonable charge if a person who is not a security holder of the Company
  makes the request.

   Additional information, including directors and officers remuneration and
indebtedness, principal holders of the Company's securities, options to
purchase securities and interests of insiders in material transactions, where
applicable, is contained in the Company's Management Proxy Circular for its
annual meeting of shareholders which is to take place on January 14, 1999.
Additional financial information is provided in the Consolidated Financial
Statements for its most recently completed financial year. Copies of the
Management Proxy Circular, Consolidated Financial Statements and the Annual
Report may be obtained upon request from the Corporate Secretary, Allelix
Biopharmaceuticals Inc., 6850 Goreway Drive, Mississauga, Ontario, L4V 1V7.
(telephone: (905) 677-0831; facsimile: (905) 677-9595)

January 14, 1999

                                     I-26
<PAGE>

                       CONSOLIDATED FINANCIAL STATEMENTS

                        ALLELIX BIOPHARMACEUTICALS INC.

                                August 31, 1999

                                      J-1
<PAGE>

                                AUDITORS' REPORT

To the Shareholders of
Allelix Biopharmaceuticals Inc.

   We have audited the consolidated balance sheets of Allelix
Biopharmaceuticals Inc. as at August 31, 1999 and 1998 and the consolidated
statements of loss and deficit and cash flows for the years then ended. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

   We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform an audit to obtain
reasonable assurance 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.

   In our opinion, these consolidated financial statements present fairly, in
all material respects, the financial position of the Company as at August 31,
1999 and 1998 and the results of its operations and its cash flows for the
years then ended in accordance with generally accepted accounting principles in
Canada.

                                          Chartered Accountants

Toronto, Canada,
October 15, 1999.

                                      J-2
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

                          CONSOLIDATED BALANCE SHEETS
                  [expressed in thousands of Canadian dollars]

<TABLE>
<CAPTION>
                                                            As at August 31
                                                            -----------------
                                                              1999     1998
                                                               $         $
                                                            --------  -------
<S>                                                         <C>       <C>
ASSETS
Current
Cash and cash equivalents [note 3].........................    3,952    5,365
Marketable securities [note 3].............................   20,836   32,832
Accounts and grants receivable.............................      461    1,986
Due from related parties [note 14].........................       59        9
Other current assets [note 6]..............................    2,287    3,201
                                                            --------  -------
Total current assets.......................................   27,595   43,393
                                                            --------  -------
Restricted funds [notes 3 and 4]...........................    1,130    1,130
Research and development acquired, net of accumulated
 amortization of $29,756 [1998--$15,093] [note 8]..........   14,741   27,291
Capital assets, net [note 7]...............................    6,743    3,849
Long-term investments [note 8].............................      216    1,120
Other assets...............................................      114      845
                                                            --------  -------
                                                              50,539   77,628
                                                            ========  =======
LIABILITIES AND SHAREHOLDERS' EQUITY
Current
Accounts payable and accrued liabilities...................    6,569    6,553
Due to related parties [note 14]...........................      252      517
Deferred revenue and other.................................      662       15
Current portion of capital lease obligations [note 9]......      569      831
                                                            --------  -------
Total current liabilities..................................    8,052    7,916
                                                            --------  -------
Capital lease obligations [note 9].........................      664    1,240
Long-term debt [note 10]...................................    2,296      --
Total liabilities..........................................   11,012    9,156
                                                            --------  -------
Shareholders' equity
Share capital [note 11]....................................  161,867  152,217
Deficit.................................................... (122,340) (83,745)
                                                            --------  -------
Total shareholders' equity.................................   39,527   68,472
                                                            --------  -------
                                                              50,539   77,628
                                                            ========  =======
</TABLE>

On behalf of the Board:

                           Director          Director

                             See accompanying notes

                                      J-3
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

                  CONSOLIDATED STATEMENTS OF LOSS AND DEFICIT
                  [expressed in thousands of Canadian dollars]

<TABLE>
<CAPTION>
                                                       Years ended August 31
                                                       ----------------------
                                                          1999        1998
                                                           $           $
                                                       ----------  ----------
<S>                                                    <C>         <C>
REVENUES
Collaborative and contract revenue [notes 5, 14 and
 17]..................................................     13,684      27,720
                                                       ----------  ----------
EXPENSES
Research and development..............................     25,463      29,131
General and administrative............................      9,336      10,105
Foreign exchange loss (gain)..........................        966      (2,290)
Interest..............................................        256         289
                                                       ----------  ----------
                                                           36,021      37,235
                                                       ----------  ----------
Loss before the following.............................    (22,337)     (9,515)
Interest income.......................................      1,482       2,195
Dilution gain [note 8]................................        --        1,089
Loss from equity investments..........................     (1,486)       (243)
Amortization..........................................    (16,254)    (15,290)
                                                       ----------  ----------
Net loss for the year.................................    (38,595)    (21,764)
Deficit, beginning of year............................    (83,745)    (61,981)
                                                       ----------  ----------
Deficit, end of year..................................   (122,340)    (83,745)
                                                       ==========  ==========
Loss per share........................................     $(2.02)     $(1.21)
                                                       ==========  ==========
Weighted average number of shares outstanding for the
 year................................................. 19,109,586  17,954,909
                                                       ==========  ==========
</TABLE>



                             See accompanying notes

                                      J-4
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                  [expressed in thousands of Canadian dollars]

<TABLE>
<CAPTION>
                                                              Years ended
                                                               August 31
                                                          --------------------
                                                           1999       1998
                                                             $          $
                                                          -------  -----------
                                                                   [Restated--
                                                                    see note
                                                                       19]
<S>                                                       <C>      <C>
OPERATING ACTIVITIES
Net loss for the year.................................... (38,595)   (21,764)
Add (deduct) items not involving cash
  Amortization...........................................  16,254     15,290
  Loss from equity investments...........................   1,486        243
  Dilution gain..........................................     --      (1,089)
                                                          -------    -------
                                                          (20,855)    (7,320)
Net change in non-cash working capital balances related
 to operations...........................................   2,596        513
                                                          -------    -------
Cash used in operating activities........................ (18,259)    (6,807)
                                                          -------    -------
INVESTING ACTIVITIES
Purchase of capital assets...............................  (2,449)    (2,036)
Net decrease in marketable securities....................  11,996     12,048
Increase in investment in Resolution Pharmaceuticals.....    (250)       --
Increase in investment in Allelix Pharm-Eco LP...........    (442)      (512)
Increase in investment in Base4 Bioinformatics Inc.......     --        (141)
Decrease (increase) in other assets......................     731       (699)
                                                          -------    -------
Cash provided by investing activities....................   9,586      8,660
                                                          -------    -------
FINANCING ACTIVITIES
Payment of capital lease obligations.....................    (838)    (1,500)
Proceeds from issuance of share capital, net.............   8,098        591
                                                          -------    -------
Cash provided by (used in) financing activities..........   7,260       (909)
                                                          -------    -------
Net increase (decrease) in cash and cash equivalents
 during the year.........................................  (1,413)       944
Cash and cash equivalents, beginning of year.............   5,365      4,421
                                                          -------    -------
Cash and cash equivalents, end of year...................   3,952      5,365
                                                          =======    =======
</TABLE>


                             See accompanying notes

                                      J-5
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999


1. NATURE OF THE COMPANY

   Allelix Biopharmaceuticals Inc. ["Allelix" or the "Company"] is a drug
development company with product programs focused on neuropharmaceuticals and
protein therapeutics. Allelix is a public company, currently trading on the
Montreal and Toronto Stock Exchanges, which is incorporated under the Canada
Business Corporations Act.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

   The consolidated financial statements have been prepared by management in
accordance with accounting principles generally accepted in Canada. The more
significant of these accounting policies are as follows:

 Basis of presentation

   The Company follows accounting principles generally accepted in Canada which
in respect of the Company comply in all material respects with those in the
United States, except as disclosed in note 15.

 Use of estimates

   The preparation of the consolidated financial statements in conformity with
generally accepted accounting principles requires management to make estimates
that affect the amounts recorded in the consolidated financial statements.
Actual results could differ from these estimates.

 Cash and cash equivalents

   Cash and cash equivalents consists of all bank balances and short-term
investments with original maturities of less than 90 days.

 Marketable securities

   Marketable securities, having interest rates of 2.38% to 5.0%, are carried
at the lower of cost plus accrued interest and market value.

 Capital assets

   Capital assets are recorded at acquisition cost less any related government
assistance. Amortization is provided using the straight-line method at rates
which are expected to charge operations with the cost of the assets over their
estimated useful lives as follows:

<TABLE>
<S>                                                   <C>
Building............................................. 4%
Leasehold improvements............................... over the term of the lease
Equipment and furniture.............................. 20%--50%
Equipment under capital lease........................ 20%--33 1/3%
</TABLE>

                                      J-6
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

 Long-term investments

   Investments in companies over which the Company can exercise significant
influence are accounted for on the equity basis of accounting under which
consolidated net loss includes the Company's share of the net income or loss of
the investee. The cost of the investment is adjusted for the Company's share of
undistributed income or losses since acquisition and write-downs are only made
for declines in value which are other than temporary.

 Foreign exchange translation

   Transactions denominated in foreign currencies are translated into Canadian
dollars at exchange rates in effect on the date of the transactions. Monetary
assets and liabilities are translated into Canadian dollars at the exchange
rate in effect as at the consolidated balance sheet dates. Gains or losses
resulting from these translation adjustments are included in income.

   Monetary assets and liabilities of integrated foreign operations are
translated into Canadian dollars at exchange rates in effect as at the
consolidated balance sheet dates. Non-monetary items are translated at historic
exchange rates. Operating revenues and expenses are translated at average
exchange rates prevailing during the year. Any corresponding foreign exchange
gains and losses are included in income.

 Revenue recognition

   Collaborative and contract revenue includes initial licence fees, research
and development support and milestone payments earned. Initial licence fees and
milestone payments are recognized when earned under the terms of the related
agreement. Research and development support is recognized in the year in which
the related research and development expenditures are incurred. Funds received
in advance of meeting the criteria for revenue recognition are deferred and
recorded as revenue as they are earned.

 Research and development

   Research and development expenditures [except for capital assets] are
charged to expenses as incurred unless a development project meets the
generally accepted accounting criteria for deferral and amortization. No
development costs have been deferred to date.

   The Company capitalizes the costs of research and development acquired upon
the acquisition of a business. These costs are amortized on a straight-line
basis over three years. Any unamortized portion of these costs related to
specific projects will be written off in the year in which the project is
discontinued or deemed to have experienced a permanent impairment in value.

   Research and development acquired does not necessarily reflect the present
or future values of the projects and the ultimate amount recoverable is
dependent on advancing the acquired research and development through clinical
trials and ultimately to commercialization.

   Costs associated with the supply of materials for clinical trial testing are
expensed as purchased unless the Company is reasonably certain of their
recovery from licensing partners or use in future clinical trials. In these
circumstances, the amounts are deferred on the consolidated balance sheets in
other current assets at the lower of cost and net realizable value.

                                      J-7
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999


 Joint venture

   The Company has an investment in a joint venture which conducts research and
development activities. The Company's proportionate share of the assets,
liabilities and expenses of the joint venture is included in the Company's
accounts.

 Pension plan

   The Company maintains a defined contribution pension plan covering
substantially all employees. The funding requirements for current service
pension costs are included in expenses during the year.

 Loss per share

   Loss per share is based on the weighted average number of common shares
outstanding during the year. Fully-diluted loss per share has not been
disclosed as the effect of the exercise of options or warrants would be anti-
dilutive.

 Income taxes

   Income taxes are accounted for using the deferral method of income tax
allocation.

 Government assistance

   The Company makes periodic applications for financial assistance under
available government incentive programs. Grants relating to capital
expenditures are recorded as a reduction of the cost of such assets. Grants
relating to current expenses are credited to income in the year the expenses
are incurred. Loans which are contingently repayable are treated as grants.

3. MARKETABLE SECURITIES

   The Company's marketable securities by type of security, contractual
maturity and classification in the consolidated balance sheets are as follows:

<TABLE>
<CAPTION>
                                                                    1999   1998
                                                                     $      $
                                                                   ------ ------
<S>                                                                <C>    <C>
Type of security
Corporate debt.................................................... 10,887 11,101
Government debt...................................................  1,657  8,913
Guaranteed Investment Certificates................................    --   2,032
U.S. dollar corporate debt........................................  9,021 11,916
U.S. dollar fixed deposit.........................................  1,493    --
Euro dollar fixed deposit.........................................  2,526    --
                                                                   ------ ------
                                                                   25,584 33,962
                                                                   ====== ======
</TABLE>

                                      J-8
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

<TABLE>
<CAPTION>
                                                                    1999   1998
                                                                     $      $
                                                                   ------ ------
<S>                                                                <C>    <C>
Contractual maturity
Maturing in one year or less...................................... 25,084 18,753
Maturing after one year through three years.......................    --  14,946
Maturing after three years........................................    500    263
                                                                   ------ ------
                                                                   25,584 33,962
                                                                   ====== ======
Classification in the consolidated balance sheets
Cash and cash equivalents.........................................  3,618    --
Marketable securities............................................. 20,836 32,832
Restricted funds..................................................  1,130  1,130
                                                                   ------ ------
                                                                   25,584 33,962
                                                                   ====== ======
</TABLE>

   The cash and cash equivalents amount above represents marketable securities
with terms to maturity less than 90 days.

4. RESTRICTED FUNDS

   The Company maintains restricted funds of $1,130,000 in the form of
marketable securities as collateral deposits in respect of certain lease
commitments.

5. LICENSING AGREEMENTS

 [a] Astra AB

   On June 18, 1996, Allelix signed a long-term agreement with Astra AB
["Astra"] for the worldwide development and commercialization of ALX1-11, the
recombinant human parathyroid hormone therapeutic ["PTH"] developed by Allelix
for the treatment of postmenopausal osteoporosis. During 1998, Allelix received
a $6,928,000 milestone payment, $10,730,000 reimbursement of costs of
commercial development and the Phase II clinical trial and $1,615,000 in
development support revenue.

   In September 1998, Astra announced that it had completed a restructuring of
its product portfolio and determined it would cancel its previous commitment to
commence Phase III trials of ALX1-11 for osteoporosis. Under the terms of the
agreement, Astra paid a 4,800,000 Netherlands Guilders [Cdn$3,981,000]
cancellation penalty and reimbursed the company 3,500,000 Netherlands Guilders
[Cdn$2,800,000] for PTH manufacturing costs that were incurred prior to its
decision to end the collaboration. The amount received for PTH research
material was included in the determination of revenues, while the cancellation
penalty partially offset the cancellation penalty expense Allelix paid Chiron
described below.

   In connection with the above agreement, Allelix had entered into a long-term
agreement with Chiron B.V. ["Chiron"] to supply PTH research material for
clinical trials and eventual commercialization. This agreement was cancelled in
December 1998. Under the terms of the agreement, Allelix paid a cancellation
penalty of 5,000,000 Netherlands Guilders [Cdn$4,048,000] in June 1999 and
fulfilled its commitment to purchase PTH research material at a cost of
4,000,000 Netherlands Guilders [Cdn$2,857,000]. Both the amount paid for PTH

                                      J-9
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

research material and the cancellation penalty were included in the
determination of research and development expenses.

 [b] Janssen Pharmaceutica N.V.

   On October 30, 1998, Allelix entered into a collaborative agreement with
Janssen Pharmaceutica N.V. ["Janssen"], a wholly owned subsidiary of Johnson &
Johnson, for the research, development and marketing of new drugs for
neuropsychiatric disorders. Under the terms of the agreement, Allelix is
entitled to receive initial licensing revenue of U.S.$2,000,000
[Cdn$3,100,000], annual research and development funding of U.S. $2,250,000
[Cdn$3,400,000] for a minimum of two years and may receive milestone payments
of up to U.S.$21,500,000 [Cdn$33,000,000] which are dependent on successful
achievement of clinical development benchmarks. During 1999, U.S.$3,900,000
[Cdn$5,900,000] of revenue was recorded in connection with this agreement,
which represents the initial licensing revenue and a portion of the annual
research and development funding. Allelix will also receive royalties from the
commercial sale of products resulting from the partnership. Royalties will be
calculated under a tiered formula that provides for increases in the royalty
rate based on aggregate annual sales revenue. In addition, Janssen will assume
responsibility for development of the compounds, including expenses. Janssen
has the right to market products worldwide, subject to an Allelix option for
co-promotion in Canada.

6. OTHER CURRENT ASSETS

   Other current assets consist of the following:

<TABLE>
<CAPTION>
                                                                     1999  1998
                                                                       $     $
                                                                     ----- -----
<S>                                                                  <C>   <C>
PTH research material............................................... 1,693 1,693
Prepaid expenses....................................................   405 1,193
Other inventory.....................................................   189   315
                                                                     ----- -----
                                                                     2,287 3,201
                                                                     ===== =====
</TABLE>

   The realization of the PTH research material is dependent on obtaining a new
licensing partner for ALX1-11 or commencing Phase III clinical trials. If
neither event occurs, a material write-down of this asset in the future may be
required.

                                     J-10
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

7. CAPITAL ASSETS

   Capital assets consist of the following:

<TABLE>
<CAPTION>
                                                                     1999  1998
                                                                       $     $
                                                                     ----- -----
<S>                                                                  <C>   <C>
Cost
Land................................................................   650   --
Building............................................................ 1,800   --
Leasehold improvements.............................................. 1,801   366
Equipment and furniture............................................. 3,097 2,653
Equipment under capital lease....................................... 2,158 3,517
                                                                     ----- -----
                                                                     9,506 6,536
                                                                     ===== =====
Accumulated amortization
Building............................................................    31   --
Leasehold improvements..............................................   187    76
Equipment and furniture............................................. 1,029   597
Equipment under capital lease....................................... 1,516 2,014
                                                                     ----- -----
                                                                     2,763 2,687
                                                                     ----- -----
Net book value...................................................... 6,743 3,849
                                                                     ===== =====
</TABLE>

8. JOINT VENTURES AND LONG-TERM INVESTMENTS

 [a] Allelix Pharm-Eco LP

   On April 8, 1997, the Company and Pharm-Eco Laboratories, Inc. ["Pharm-Eco"]
of Lexington, Massachusetts formed Allelix Pharm-Eco LP ["APE"], a United
States limited partnership, to develop jointly two families of
neuropharmaceutical compounds. At that time, Allelix paid U.S.$1,800,000
[Cdn$2,481,000], consisting of 88,094 Allelix common shares valued at
U.S.$800,000 [Cdn$1,112,000] and U.S.$1,000,000 [Cdn$1,369,000] in cash to
Pharm-Eco for its interest in the joint venture. The Company further invested
U.S.$1,000,000 [Cdn$1,379,000] in the joint venture in April 1997 to fund pre-
clinical development of the two programs to bring Allelix's ownership interest
to 60.5%. The purchase was accounted for as research and development acquired.

   During 1998, the Company paid an additional U.S.$1,800,000 [Cdn$2,587,000]
by issuing 247,295 Allelix common shares to Pharm-Eco following the achievement
of certain commercial milestones. Allelix invested in the joint venture an
additional U.S.$1,000,000 [Cdn$1,507,000] in cash and converted its accounts
receivable [U.S.$839,000 or Cdn$1,314,000] from the APE into units of the
partnership to bring Allelix's ownership interest to 68.2%. The excess of these
amounts, of $3,623,000, over the underlying net book value was allocated to
research and development acquired.

   In December 1998, an additional U.S.$1,000,000 [Cdn$1,536,800] in cash and
the conversion of U.S.$622,000 [Cdn$932,000] of the Company's accounts
receivable into units of the partnership increased Allelix's ownership in the
joint venture to 71.6%. The excess of these amounts, of $561,000, over the
underlying net book value was allocated to research and development acquired.

                                     J-11
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999


   During 1999, the Company's proportionate share of the expenses of the joint
venture was $1,837,000 [1998--$1,906,000] which has been included in research
and development expenses. As at August 31, 1999, the Company's proportionate
share of assets was $30,297 [1998--$564,000] and the proportionate share of
liabilities was $207,000 [1998--$406,000].

 [b] Resolution Pharmaceuticals Inc.

   During 1993, the Company commenced certain research and development
activities in Resolution Pharmaceuticals Inc. ["Resolution"], a 50% owned joint
venture with Nordion International Inc. As a result of Resolution issuing
$7,500,000 of common and Class A preference shares to new investors during
fiscal 1997 and 1996, Allelix's investment was reduced to 25.4% and Resolution
was no longer considered a joint venture.

   In June 1998, an additional $2,500,000 was advanced to Resolution from the
other investors upon the achievement by Resolution of certain commercial
milestones. As a result, Allelix's investment in Resolution, on a fully diluted
basis, was reduced from 25.4% to 21.8%. Allelix has the potential to earn back
a further 4.2%, based on the achievement by Resolution of certain research and
financial milestones.

   On March 1, 1999, Allelix and the other investors loaned $1,250,000 to
Resolution. The Company's share of the loan was $250,000. As at August 31,
1999, the carrying balance of the loan has been fully reduced by equity losses
recorded in 1999.

 [c] Base4 Bioinformatics Inc.

   On January 14, 1998, Base4 Bioinformatics Inc. ["Base4"], a subsidiary
company established in 1996, successfully completed a private placement
financing for approximately $4,500,000. The funding came from three
institutional investors and reduced Allelix's shareholding in Base4 to an
equity position of approximately 30%. Allelix ceased consolidating this
subsidiary at this date and began accounting for Base4 as an equity investment.
Allelix recorded a dilution gain of $1,089,000 in 1998.

 [d] Maxxam BioDiscoveries Inc.

   On March 9, 1999, the Company, together with Maxxam Analytics Inc., formed a
new company, Maxxam BioDiscoveries Inc. ["MBD"]. The new company will provide
advanced high-throughput screening and pharmacology services for drug
discovery. Allelix received a 49.9% interest in MBD in return for the
assignment of patents and other intangible property to MBD. Allelix has entered
into a loan agreement with an initial carrying value of $332,000 with MBD as a
result of the transfer of certain research equipment to MBD. The loan is
interest free for the first two years and subsequently bears interest at prime
plus 3%. As at August 31, 1999, the carrying balance of the loan has been fully
reduced by equity losses recorded in 1999.

                                      J-12
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

9. LEASE OBLIGATIONS

 [a] Capital leases

   Future minimum annual lease payments consist of the following:

<TABLE>
<CAPTION>
                                                                            $
                                                                          -----
<S>                                                                       <C>
2000.....................................................................   655
2001.....................................................................   527
2002.....................................................................   179
2003.....................................................................     2
                                                                          -----
                                                                          1,363
Less amounts representing interest at rates ranging from 8.2% to 14.7%...   130
                                                                          -----
                                                                          1,233
Less current portion.....................................................   569
                                                                          -----
                                                                            664
                                                                          =====
</TABLE>

   The carrying value of these leases approximates fair value.

 [b] Operating leases

   At August 31, 1999, the Company had commitments under operating leases
requiring annual rental payments as follows:

<TABLE>
<CAPTION>
                                                                             $
                                                                           -----
<S>                                                                        <C>
2000......................................................................   707
2001......................................................................   642
2002......................................................................   631
2003......................................................................   606
2004......................................................................   664
Thereafter................................................................ 3,015
                                                                           -----
                                                                           6,265
                                                                           =====
</TABLE>

10. LONG-TERM DEBT

   On March 8, 1999 Allelix purchased the land and building on 6850 Goreway
Drive from the Ontario Development Corporation. Allelix financed the purchase
with a Committed Instalment Loan [the "loan"] of $2,300,000 which is available
on a revolving basis and matures March 15, 2004. As at August 31, 1999, the
interest rate on the loan is based on a three month Banker's Acceptance plus
1%. Interest expense in 1999 was $60,000 [1998--nil]. Since the interest rate
floats with current market rate, the current value approximates fair value.
Terms of the loan require the Company to maintain a minimum amount of cash and
cash equivalents and/or marketable securities.

11. SHARE CAPITAL

 [a] Authorized

   The authorized share capital of the Company consists of unlimited common
shares and unlimited preferred shares issuable in series.

                                     J-13
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999


   The preferred shares may be issued solely by resolution of the Board of
Directors. The Board of Directors has the authority to provide for the creation
of each series and to determine the rate, amount or method of calculation of
dividends, whether such dividends are cumulative and the redemption, conversion
and other rights of each series. [note 5 [b]]

 [b] Issued and outstanding

   Summarized below are the Company's issued and outstanding shares, warrants
and options:

<TABLE>
<CAPTION>
                                             Preferred                Options
                            Common shares     shares      Warrants      [v]
                          ------------------ --------- -------------- -------
                                     Stated   Stated           Stated          Total share
                                      value    value           value             capital
                            Number      $        $     Number    $       $          $
                          ---------- ------- --------- ------- ------ -------  -----------
<S>                       <C>        <C>     <C>       <C>     <C>    <C>      <C>
Balance, August 31,
 1997...................  17,704,520 144,434     --    162,441  705    3,900     149,039
 Issued for business
  acquisitions [i]......     247,295   2,587     --        --   --       --        2,587
 Issued under stock
  option plans [v]......     196,276   3,347     --        --   --    (2,756)        591
                          ---------- -------   -----   -------  ---   ------     -------
Balance, August 31,
 1998...................  18,148,091 150,368     --    162,441  705    1,144     152,217
 Issued for cash [ii],
  [iii].................   1,470,588   5,000   3,060   666,667  --       --        8,060
 Issued for business
  acquisitions [iv].....     486,395   1,552     --        --   --       --        1,552
 Issued under stock
  option plans..........      21,108     294     --        --   --      (256)         38
                          ---------- -------   -----   -------  ---   ------     -------
Balance, August 31,
 1999...................  20,126,182 157,214   3,060   829,108  705      888     161,867
                          ========== =======   =====   =======  ===   ======     =======
</TABLE>
- --------
[i]  On December 22, 1997 and February 12, 1998, the Company issued 57,901 and
     189,394 common shares at $12.39 and $9.87, respectively, per share for an
     aggregate value of $2,587,000 to Pharm-Eco [note 8[a]].

[ii]  On April 19, 1999 the Company completed a private placement of 1,470,588
      common shares together with 666,667 common share purchase warrants for an
      aggregate value of $5,000,000. Each warrant entitles the holder to
      purchase one common share at an exercise price of $7.50 per share to July
      17, 2000.

[iii]  On November 2, 1998, the Company issued 1,000 Series 1 preferred shares
       to Johnson & Johnson Development Corporation ["JJDC"] for an aggregate
       amount of U.S.$2,000,000 [Cdn$3,100,000]. The shares are non-voting, pay
       no dividend and are mandatorily convertible into common shares on or
       before April 30, 2000. The conversion price will be at a 20% discount
       from fair market value subject to floor and ceiling prices of $3.36 and
       U.S.$9.00 [Cdn$13.44] per share, respectively. At the time of conversion
       JJDC will purchase an additional U.S.$2,000,000 [Cdn$2,986,000] of
       common shares at the then current price subject to floor and ceiling
       prices of $3.95 and U.S.$9.00 [Cdn$13.44] per share, respectively and
       other conditions set forth in a stock purchase agreement.

[iv]  Following the completion of the Janssen licensing agreement [note 5[b]],
      a U.S.$1,000,000 [Cdn$1,552,000] milestone payment payable in Allelix
      common shares to the former Trophix Pharmaceuticals Inc. ["Trophix"]
      shareholders was required. As a result the Company issued 486,395 common
      shares valued at $3.19 per share in November 1998. Up to an additional
      U.S.$3,000,000 [Cdn$4,479,000] may be paid to Trophix shareholders in
      Allelix common shares upon achievement by Allelix Neuroscience Inc. of
      further clinical and commercial milestones by July 29, 2001.

[v]  Upon acquisition of Trophix in 1997, 375,000 options of the Company were
     issued to replace options held by Trophix shareholders. The fair value of
     these options, $10.40 per option [aggregating $3,900,000 million], was
     recorded at the time of acquisition. As each option is either exercised or
     canceled, the carrying value per unit is transferred to common shares.

 [c] Stock option plans

   [i] The Board of Directors may authorize the issuance of up to 2,000,000
options to purchase common shares [excluding the options described in note
11[c][ii]] under various stock option plans provided that the number of options
outstanding at any time shall not exceed 12% of the then outstanding common
shares.

                                      J-14
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

   Stock option transactions for the respective periods and the number of share
options outstanding are summarized as follows:

<TABLE>
<CAPTION>
                                                                          #
                                                                      ---------
<S>                                                                   <C>
Issued and outstanding as at August 31, 1997......................... 1,336,944
Issued during the year...............................................   534,750
Exercised during the year............................................  (192,775)
Cancelled during the year............................................  (233,415)
                                                                      ---------
Issued and outstanding as at August 31, 1998......................... 1,445,504
Issued during the year...............................................   545,800
Exercised during the year............................................   (20,760)
Issued as a result of re-pricing.....................................   205,337
Cancelled as a result of re-pricing..................................  (410,664)
Cancelled during the year............................................  (330,952)
                                                                      ---------
Issued and outstanding as at August 31, 1999......................... 1,434,265
                                                                      =========
</TABLE>

   During the year, the Board of Directors of Allelix approved a revaluation of
410,664 options outstanding and offered the employees of Allelix the
opportunity to exchange the options that they held for new options with an
exercise price of $2.80 each at a ratio of 2:1.

   Pending shareholder approval, 225,600 options held by three officers of the
Company have been revalued at a ratio of 2:1 with an exercise price of $2.80.

   The stock options outstanding as at August 31, 1999, allow individuals to
purchase 1,434,265 shares at prices between $0.75 and $22.45 per share. These
options vest over a period of three to five years and expire at various dates
as follows:

<TABLE>
<CAPTION>
                                                          Expiry                     Weighted
   Option price            Outstanding                     date                      average
   ------------            -----------                   ---------                   --------
   <S>                     <C>                           <C>                         <C>
   $0.75-$2.16                 85,359                    2003-2007                    $ 1.54
   $2.30-$2.60                364,000                    2001-2005                    $ 2.43
   $2.80                      271,812                    2001-2009                    $ 2.80
   $3.20-$6.88                324,369                    2001-2009                    $ 4.99
   $7.00-$22.45               388,725                    2005-2008                    $12.23
                            ---------                    ---------                    ------
   $0.75-$22.45             1,434,265                    2001-2009                    $ 5.68
                            =========                    =========                    ======
</TABLE>

     [ii] In 1995, the Company issued 265,000 stock options to a company to
acquire exclusive worldwide licencing rights to a metabolic hormone. Of the
stock options issued, 65,000 are currently exercisable at a price of $9.63 and
50,000 are exercisable at $3.43; the remaining 150,000 options become
exercisable only when defined drug development milestones are achieved, at
prices to be set based upon market prices for Allelix common shares prevailing
when the milestones are met. These options are excluded from the maximum option
limits described in note 11[c][i].

                                     J-15
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

12. CONSOLIDATED STATEMENTS OF CASH FLOWS

   The following represent the non-cash transactions of the Company:

   During 1999, capital assets were acquired at an aggregate cost of $4,745,000
[1998--$2,145,000] of which none were acquired by means of a capital lease
[1998--$109,000] and $2,296,000 [1998--nil] were financed through long-term
debt. In addition, capital assets with a book value of $332,000 [1998--nil]
were sold to MBD in exchange for a note payable.

   During 1999, the Company converted $119,000 [1998--$524,000] of accounts
receivable due from APE into additional ownership units of APE.

   During 1999, the Company paid $1,552,000 to Trophix shareholders by issuing
486,395 common shares pursuant to the achievement of certain milestones.

   During 1999, 25,203 of the options either exercised or canceled as part of
the acquisition of Trophix were converted into common shares of the Company. As
a result, $256,000 of the value assigned to the options were transferred into
common stock.

   During 1998, the reduction of the Company's interest in Base4 to
approximately 30% required the Company to cease consolidating this subsidiary
and begin accounting for Base4 as an equity investment. This recording of the
investment resulted in a reduction of $133,000 in non-cash net assets.

   During 1998, the Company paid $2,587,000 to Pharm-Eco by issuing 247,295
common shares pursuant to the achievement of certain milestones.

   During 1999, cash interest paid was $231,000 [1998--$289,000] and no cash
income taxes were paid.

13. INVESTMENT TAX CREDITS AND SCIENTIFIC RESEARCH AND EXPERIMENTAL DEVELOPMENT
   EXPENDITURES

   The Company earns investment tax credits ["ITCs"] at the rate of 20% of
eligible scientific research and experimental development ["SRED"]
expenditures. Unclaimed ITCs may be carried forward to apply against future
years' federal income taxes. The Company has unclaimed ITCs of approximately
$12,700,000 which expire over the period from 2005 to 2009. In addition, as at
August 31, 1999, the Company has SRED expenditures not claimed for income tax
purposes of approximately $100,000,000 available to reduce taxable income in
future years, which have no expiry date. The Company also has Federal income
tax loss carryforwards of $1,200,000 and Ontario tax loss carryforwards of
$3,400,000 which will expire in 2006. The potential future tax benefits that
may result from the application of these carryforward amounts or from the
utilization of the unclaimed ITCs have not been recognized in these
consolidated financial statements.

   At August 31, 1999, Allelix Neuroscience Inc. had accumulated net operating
losses of U.S.$17,800,000 for United States Federal income tax purposes. Net
operating losses prior to the change in ownership that occurred in July 1997,
when Allelix Neuroscience Inc. was purchased by the Company, will be subject to
an annual utilization limitation for U.S. income tax purposes. No tax benefit
has been recorded in these consolidated financial statements in respect of
losses. These losses will expire over the period from 2008 to 2014.

                                     J-16
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

14. RELATED PARTY TRANSACTIONS

   The Company conducted research projects under a collaborative agreement at
commercial rates with two shareholders resulting in approximately $10,029,000
[1998--$5,225,000] of revenue. The amount due from one of these shareholders as
at August 31, 1999 is $10,000 [1998--nil].

   Effective January 1, 1997, Allelix entered into a services agreement with
Base4 to obtain systems administration services, custom programming and project
support. Amounts charged by Base4 in 1999 under this agreement were $598,000
[1998--$1,280,000 ]. The amount due to Base4 as at August 31, 1999 is $252,000
[1998--$517,000]. This amount is non-interest bearing.

   The Company provided drug discovery research and development services to
Pharm-Eco at commercial rates resulting in approximately $631,000 [1998--
$644,000] of revenue. The amount due from Pharm-Eco as at August 31, 1999 is
$49,000 [1998--nil].

   During 1999, the Company provided assay testing services to Resolution at
commercial rates resulting in approximately $58,000 [1998--nil] of revenue. The
Company was also reimbursed $158,000 [1998--203,000] by Resolution under the
terms of a shared services agreement. The amount due from Resolution as at
August 31, 1999 is nil [1998--$9,000].

15. SIGNIFICANT DIFFERENCES BETWEEN CANADIAN AND UNITED STATES GENERALLY
   ACCEPTED ACCOUNTING PRINCIPLES

   The Company's consolidated financial statements are prepared in accordance
with accounting principles generally accepted ["GAAP"] in Canada. The most
significant differences between Canadian and United States GAAP insofar as they
affect the Company's consolidated financial statements are described below.

                                     J-17
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

   The following table reconciles results as reported under Canadian GAAP with
those that would have been reported under U.S. GAAP:

<TABLE>
<CAPTION>
                                                               1999     1998
                                                                 $        $
                                                              -------  -------
<S>                                                           <C>      <C>
Net loss for the year--Canadian GAAP......................... (38,595) (21,764)
Stock-based compensation [i].................................     (93)     --
Dilution gain [iii]..........................................     --    (1,089)
Acquired research and development [iv].......................   1,195    1,195
                                                              -------  -------
Net loss for the year--U.S. GAAP............................. (37,493) (21,658)
Amortization of beneficial conversion feature [viii].........    (397)     --
                                                              -------  -------
Net loss attributable to common shareholders - U.S GAAP...... (37,890) (21,658)
Loss per share--U.S. GAAP....................................    1.98     1.21
                                                              =======  =======
Net loss for the year--U.S. GAAP............................. (37,493) (21,658)
Unrealized gains (losses) on securities available for sale...      94     (153)
                                                              -------  -------
Comprehensive Income......................................... (37,399) (21,811)
                                                              =======  =======
</TABLE>
- --------
[i] SFAS No.123, "Accounting for Stock-based Compensation", became effective
    for the Company's fiscal 1997 year. The Company continues, for
    reconciliation to U.S. GAAP purposes, to account for its outstanding fixed
    price stock options under Acounting Principles Board Opinion 25,
    "Accounting for Stock Issued to Employees", which results in the recording
    of no compensation expense in the Company's circumstances. U.S. GAAP does,
    however, require stock option transactions with non-employees be recorded
    as compensation expense and measured at the fair value of the consideration
    received or the compensation paid, whichever is more reliably measured. The
    fair value of the options granted to non-employees have been estimated at
    the date of grant using the Black-Scholes option pricing model with the
    following weighted average assumptions: risk free interest rate of 5.0%;
    dividend yield of 0%; volatility factor of the expected market price of the
    Company's common shares of 0.566; and a weighted average expected option
    life of five years.
[ii] Under U.S. GAAP, share issue costs must be accounted for in share capital
     as a reduction to the proceeds received from the share issue. Under
     Canadian GAAP, the Company has excluded share issue costs from the
     determination of net loss and has recorded them as an increase to
     accumulated deficit.
[iii] Under U.S. GAAP, dilution gains for which realization is not assured must
      be treated as an equity transaction. Since Base4 is an entity whose
      ability to continue in existence remains in question, the realization of
      the dilution gain the Company experienced on the issuance of Base4 common
      shares is not assured. Under Canadian GAAP, the Company has included the
      dilution gain in the determination of net loss.
[iv] Under U.S. GAAP, in a business combination accounted for as a purchase, a
     portion of the purchase price should be allocated to in-process research
     and development projects. Unless the project in process has an alternative
     future use, the fair value is charged to expense as research and
     development costs. The $3,586,000 of in-process research and development
     projects acquired in connection with the purchase of Trophix in 1997 do
     not have alternative future uses. The Company, under Canadian GAAP,
     capitalized the fair value of the in-process research and development
     projects acquired and has been amortizing the amount over three years.
     Amortization expense in 1999 was $1,195,000 [1998--$1,195,000, 1997--
     $100,000]. Under U.S. GAAP, the Company is required to expense the
     $3,586,000 in 1997 and reverse the amortization for each of the three
     years mentioned above.

                                     J-18
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
       [Tabular amounts are expressed in thousands of Canadian dollars,
            except the number of shares and per share information]

                                August 31, 1999

[v] SFAS No. 128, "Earnings Per Share", is effective for fiscal periods ending
    after December 15, 1997. This statement has no significant effect on the
    reported U.S. GAAP earnings per share data for the years ended August 31,
    1999 and 1998.
[vi] The Company has certain interest in a jointly controlled entity which has
     been proportionately consolidated in the Company's consolidated financial
     statements. For purposes of U.S. GAAP, this interest would be accounted
     for by the equity method. Net loss, loss per share and deficit under U.S.
     GAAP are not impacted by the proportionate consolidation of this interest
     in a jointly controlled entity.
[vii] Under U.S GAAP, the preferred shares issued during the year which allow
      the holder to convert the preferred shares at a discount to a future
      market value is considered a beneficial conversion feature. The value of
      this feature is amortized, using the effective yield method, over the
      period to the preferred shares' earliest conversion date.

   As a result of the above differences, as at August 31, 1999 under U.S.
GAAP, long-term assets would decrease by $1,096,000 [1998--$2,291,000],
current assets would decrease by $59,000 [1998--$153,000], share capital would
decrease by $5,999,000 [1998--$6,092,000], and total shareholders' equity
would decrease by $1,155,000 [1998--$2,650,000]. In addition, comprehensive
income would decrease by $94,000 [1998--$153,000].

16. SEGMENTED INFORMATION

   Allelix monitors its operations as one segment which involves the
development and discovery of biopharmaceuticals with focus on
neuropharmaceuticals and protein therapeutics. While in the current growth
phase, operating expenses are reviewed at the consolidated level. This
represents the manner in which the Company is organized for assessing
performance and making resource allocation decisions.

   The Company's revenues by location of customer and capital assets by
geographic location are as follows:

<TABLE>
<CAPTION>
                                      Canada United States Sweden Belgium Total
1999                                    $          $         $       $      $
- ----                                  ------ ------------- ------ ------- ------
<S>                                   <C>    <C>           <C>    <C>     <C>
Revenues............................. 3,965        639      3,124  5,956  13,684
Capital assets, net.................. 4,481      2,262        --     --    6,743
<CAPTION>
1998
- ----
<S>                                   <C>    <C>           <C>    <C>     <C>
Revenues............................. 6,816        527     19,270  1,107  27,720
Capital assets, net.................. 3,187        662        --     --    3,849
</TABLE>

   Revenues from 2 related customers approximate $5,956,000 and $4,073,000 and
revenues from non-related customers approximate $3,124,000 of the Company's
total revenues.

17. GOVERNMENT GRANTS

   During the year, Allelix earned government grants of approximately nil
[1998--$1,400,000] which are included in collaborative and contract revenue,
and nil [1998--$96,000] which are included as a reduction of capital assets.

18. UNCERTAINTY DUE TO THE YEAR 2000 ISSUE

   The Year 2000 Issue arises because many computerized systems use two digits
rather than four to identify a year. Date-sensitive systems may recognize the
year 2000 as 1900 or some other date, resulting in errors when information
using year 2000 dates is processed. In addition, similar problems may arise in
some systems which use certain dates in 1999 to represent something other than
a date. The effects of the Year 2000 Issue

                                     J-19
<PAGE>

                        ALLELIX BIOPHARMACEUTICALS INC.

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
        [Tabular amounts are expressed in thousands of Canadian dollars,
             except the number of shares and per share information]

                                August 31, 1999

may be experienced before, on, or after January 1, 2000, and, if not addressed,
the impact on operations and financial reporting may range from minor errors to
significant systems failure which could affect an entity's ability to conduct
normal business operations. It is not possible to be certain that all aspects
of the Year 2000 Issue affecting the Company, including those related to the
efforts of customers, suppliers, or other third parties, will be fully
resolved.

19. COMPARATIVE CONSOLIDATED FINANCIAL STATEMENTS

   The comparative consolidated financial statements have been reclassified
from statements previously presented to conform to the presentation of the 1999
consolidated financial statements. The consolidated statements of cash flows
for the year ended August 31, 1998 have been restated to reflect the
retroactive adoption of The Canadian Institute of Chartered Accountants revised
guideline for cash flow statements. In addition, the Company has reclassified
the fair value of the options issued pursuant to the Trophix acquisition from
accounts payable to share capital.

20. MERGER WITH NPS PHARMACEUTICALS, INC.

   On September 27, 1999, Allelix announced that a definitive agreement had
been signed to merge the operations of the Company with NPS Pharmaceuticals,
Inc. ["NPS"] subject to approval by the shareholders of both companies. The
transaction is expected to close in the first quarter of 2000. The combined
company will operate as NPS Pharmaceuticals, Inc. in the U.S., and as NPS
Allelix in Canada. Based on the number of outstanding Allelix shares, NPS will
issue approximately 6,500,000 shares of common stock to Allelix common
shareholders at an exchange ratio of 0.3238 shares of NPS common stock for each
outstanding share of Allelix stock. In addition to the 6,500,000 shares
initially issued, 1,000,000 shares of NPS stock will be reserved for issuance
to the holders of Allelix options, warrants and preferred stock at the same
exchange ratio. Consummation of the merger may significantly affect the future
operations, capital requirements and liquidity of the Company in manners that
differ from those originally contemplated by management.

                                     J-20
<PAGE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL POSITION AND RESULTS OF OPERATIONS



Corporate Structure

Allelix Biopharmaceuticals Inc. is a biopharmaceutical company applying
innovative chemical and biological approaches to the discovery and development
of novel pharmaceutical products.  The Company plans to commercialize products
for major therapeutic categories globally through partnerships with leading
multinational pharmaceutical companies that may generate royalty revenue for
Allelix.  In addition, the Company intends to develop products for niche
indications that it will bring to market itself.

The Company has developed expertise in two areas of biopharmaceutical drug
discovery: large molecule protein therapeutics based on the recombinant
production of proteins and peptides and receptor and transporter-based drug
design focused on small molecule drugs for the neurosciences.  Its technological
capabilities are sufficiently broad to support the development of a rich
pipeline of products.

The Company has incurred net losses since 1989 as a result of its investment in
technology and product development. Given the significant scientific, regulatory
and commercial uncertainties regarding the outcome of the Company's development
efforts, all development costs have been expensed to date .

The largest single cash expense for Allelix is the salaries and benefits of
its personnel.  Costs such as research supplies are proportional to the staff
levels assigned to a given project.  As products have entered clinical trials,
payments to external suppliers, including contract research organizations,
clinical investigators and suppliers of drug for use in the trials, have become
more significant.  These costs are being incurred to bring products to the stage
where they can either lead to partnerships with pharmaceutical companies or
where they can be commercialized by Allelix itself.  The partnerships typically
provide significant revenue to Allelix through licensing fees, milestone
payments and reimbursement of research and development expenditures.
Additionally, sales of the products in future years by the partners may generate
significant sustainable revenue for the Company through royalty payments.

Effective July 29, 1997, the Company acquired Trophix Pharmaceuticals, Inc. of
South Plainfield, New Jersey, in exchange for common shares of the Company
valued at $24.45 million.  All amounts are in Canadian dollars, except where
otherwise indicated.  In November 1998, Allelix made a milestone payment in
common shares of the Company valued at US$3.19 each for an aggregate value of
US$1 million.  Trophix shareholders may receive further payments of up to US$3
million in Allelix common shares upon achievement of certain clinical and
business milestones prior to July 29, 2001.  The acquisition added a new
technology platform and three programs to the Company's

                                      K-1
<PAGE>

neuroscience portfolio. These were for the treatment of schizophrenia,
neuropathic pain and for pain/spinal cord injury. The neuropathic pain product
was being developed jointly with Janssen Pharmaceutica N.V. of Belgium.
Subsequent to acquisition, Trophix was renamed Allelix Neuroscience Inc. (ANI).

On April 8, 1997, the Company and Pharm-Eco Laboratories, Inc. of Lexington,
Massachusetts formed Allelix Pharm-Eco LP, a United States limited partnership
to jointly develop two families of neuropharmaceutical compounds in dementia and
cocaine addiction. At that time, Allelix contributed cash and common shares of
the Company having a combined value of $ 2.48 million. In April 1998, the
Company further invested $2.59 million, consisting of 247,295 common shares
valued at $10.46 each. Pharm-Eco contributed its intellectual property and
rights to the two programs. Allelix also funded US$1 million of pre-clinical
development costs during the current year and converted $0.9 million of accounts
receivable from the joint venture thereby increasing its interest in it to
71.6%. Under the terms of the agreement with Pharm-Eco, the Company will be
responsible for its proportionate share of the research and development costs
while Pharm-Eco will be responsible for the balance.

In March 1999, the Company formed a joint venture with Maxxam Analytics Inc. to
establish a high throughput screening company, Maxxam BioDiscoveries Inc.
Allelix owns a 49.9% interest in the company and has no obligation to provide
equity funding to the company.  Allelix expects to continue its strategy of
developing and obtaining financing for businesses that may not be central to its
major areas of focus.

Results of Operations

For the fiscal year ended August 31, 1999, the Company incurred a net loss of
$38.6 million or $2.02 per common share.  These results compare with a net loss
of $21.8 million or $1.21 per common share for the year ended August 31, 1998.
Conducting clinical trials is one of the most expensive aspects of drug
development.  The Company's expenses are determined by the number of product
candidates it places into the clinical development phase (as compared to
earlier, less expensive research phases) and the financial support of corporate
partners, if any.  In September 1997, the Company's pharmaceutical partner for
the commercialization of ALX1-11, a recombinant human form of PTH for the
treatment of post-menopausal osteoporosis, Astra AB of Sweden, announced its
decision to proceed into Phase III clinical trials.  As a result, Allelix
received $19.3 million from Astra for a milestone payment and the reimbursement
of specific Phase II and other costs.  In September 1998, Astra announced that
it had completed a restructuring of its product portfolio and would not commence
Phase III trials of ALX1-11.  Astra returned the non-capital assets associated
with the program to Allelix at no cost and paid a cancellation penalty of 4.8
million Netherlands Guilders (Cdn$4.0 million) to the Company.  As a result,
Allelix ended its long-term agreement with Chiron B.V. (Chiron) to supply PTH
research material for clinical trials and paid a similar cancellation fee in
June 1999 which was offset against the Astra payment.

                                      K-2
<PAGE>

Revenues


Collaborative and contract revenues

Astra's decision to end its collaboration was the primary cause of the reduced
collaborative and contract revenues in 1999 of $13.7 million compared with $27.7
million in 1998.  The Company earned $10.7 million in 1998 from Astra following
the submission of the final report on the Phase II clinical trial for ALX1-11 as
full reimbursement of Phase II costs. Allelix also received a milestone payment
of $7.0 million from Astra in 1998 for the successful completion of the trial.
In addition, the Company earned development support revenue from Astra of $0.3
million in 1999 compared with $1.6 million in 1998. In 1999 Allelix earned $2.8
million as a reimbursement from Astra for the PTH manufacturing costs that were
incurred prior to its decision to end the collaboration.  Contract revenue from
the Company's other pharmaceutical partners was $12.4 million compared with $8.4
million in 1998.  The increase was due to the new collaborative agreement for
GRI-1 entered into with Janssen Pharmaceutica N.V. ("Janssen") in the first
quarter of 1999.

New Alliances

On October 30, 1998, Allelix entered into a collaborative agreement with
Janssen, a wholly owned subsidiary of Johnson & Johnson, for the research,
development and marketing of new drugs for neuropsychiatric disorders.  Under
the terms of the agreement, Allelix received initial licensing revenue of $3.1
million, annual R&D funding of $3.4 million for a minimum of two years and may
receive milestone payments of up to $33 million tied to clinical development
benchmarks.  Allelix will also receive royalties from the commercial sale of
products resulting from the partnership.  Janssen has the right to market
products worldwide, subject to an Allelix option for co-promotion in Canada.

Interest Income

Interest income decreased to $1.5 million compared to $2.2 million in 1998 as a
result of lower cash balances. Prevailing interest rates increased slightly over
the course of the year, the average rate increasing to 4.7% in 1999 from 4.6% in
1998.

Costs and Expenses


Research and Development

The Company's total operating expenses before amortization declined to $36.0
million in 1999 from $37.2 million in fiscal 1998.  Research and development
expenses amounted to $25.5 million in 1999, a decrease of 12.4% from the $29.1
million in the preceding year.  The most significant reason for the decrease is
the prior year's decision to terminate some of the early-stage discovery
programs and the reduction in related staffing and contract expenses.  Expenses
associated with the anti-migraine drug ALX-0646, $1.7 million, which is
approaching Phase II trials, ALX-0600, $5.0 million, which completed Phase I and
is

                                      K-3
<PAGE>

recruiting patients for a pilot Phase II trial, ALX1-11 for osteoporosis, $5.3
million, and the GRI-1 program, $2.7 million, partnered with Janssen
Pharmaceutica, accounted for approximately $14.5 million of the $25.5 million of
R&D expenses during the year. The expenditures on these programs contributed to
the initiation of a Phase II clinical trial with ALX-0600 subsequent to year-end
and to the Janssen collaboration.


General and Administrative

Allelix includes in general and administrative expense all costs not directly
related to the conduct of research and development, including the costs of
premises, information services, human resources, accounting and senior
management compensation. This amount decreased by $0.8 million or 8% to $9.3
million in 1999 from $10.1 million in 1998. The decrease is primarily the result
of lower compensation costs as a result of the reduction in the senior
management complement.

Amortization

Allelix amortizes capital assets and research and development that are acquired.
Amortization expense of $16.3 million for 1999 increased from $15.3 million in
1998 due to the additional investment in Pharm-Eco LP through the current and
prior year.

Liquidity and Capital Resources

Since 1989, the Company has financed product candidate development costs,
operations and capital expenditures primarily from payments received under
agreements with other pharmaceutical companies, public and private sales of
equity securities and interest income.

As at August 31, 1999 the Company had total assets of $50.5 million, compared
with $77.6 million as at August 31, 1998.  This decrease is primarily due to the
use of $18.3 million of cash to finance operations in 1999 and the $14.7 million
of amortization of acquired research and development.

Current assets also decreased due to the use of cash, from $43.4 million as at
August 31, 1998 to $27.6 million as at August 31, 1999.  Current liabilities
increase $7.9 million as at August 31, 1998 to $8.1 million as at August 31,
1999.  Therefore, working capital amounted to $19.5 million as at August 31,
1999 compared with $35.5 million the previous year.

The balance of cash, marketable securities and restricted funds at August
31, 1999 was $25.9 million, compared with  $39.3 million at August 31, 1998.
The decrease represents the use of funds to support ongoing product development
activities.  The Company invests its cash reserves in liquid, high-grade
investment securities with terms to maturity not exceeding two years.  The terms
are selected based on prevailing interest rates and the expected timing of
expenditures for operations and capital requirements.

The Company anticipates funding virtually all of the pre-clinical drug
development costs of the dementia program in the Allelix Pharm-Eco LP,
notwithstanding its 71.6% interest.

                                      K-4
<PAGE>

The Company receives an increased percentage ownership if it finances more than
its proportionate share in this joint venture.

The two U.S. subsidiaries involve the Company in foreign exchange transactions
as it funds their drug discovery and clinical trial costs.  These U.S. dollar
costs will be partially offset by revenue received from its pharmaceutical
partners, most of which will likely be denominated in U.S. currency.  As a
result, the Company will have created a natural hedge that should reduce the
necessity to engage in foreign exchange or other derivatives transactions.

On November 2, 1998, as part of the GRI-1 licensing transaction, Allelix
received $3.1 million from the sale of convertible preferred shares - series 1
to Johnson & Johnson Development Corporation ("JJDC"), a subsidiary of Janssen's
parent company, which is already an Allelix shareholder.  The shares are non-
voting, pay no dividend and are mandatorily convertible in April 2000 into
common shares at a 20% discount from fair market value at the time of conversion
subject to floor and ceiling prices of $3.36 and US$9.00 (Cdn$13.44)
respectively per share.  Also in April 2000, JJDC will purchase an additional
US$2 million (Cdn$3.0 million) of common shares at the then current price
subject to floor and ceiling prices of $3.95 and US$9.00 (Cdn$13.44)
respectively per share.

Completion of the Janssen agreement also triggered a US$1 million milestone
payment to the Trophix shareholders and as a result the Company issued 486,395
common shares valued at $3.19 each or $1.55 million in November 1998.

In April 1999, the Company completed a private placement of 1,470,588 common
shares together with 666,667 common share purchase warrants for an aggregate
value of $5 million.  Each warrant entitles the holder to purchase one common
share at an exercise price of $7.50 per share to July 17, 2000.

Outlook

The Company expects to generate a milestone payment in 2000 from the GRI-1 drug
development agreement signed with Janssen, as well as another research,
development and distribution agreement expected to be completed in the
neuroscience area.  The extent and timing of such additional licensing fees, if
any, will be dependent upon the overall structure of each proposed agreement,
including the royalties from product sales.  In addition, one existing research
agreement has been extended for at least one more year generating $2.7 million
of collaborative and contract revenue in 2000.

The Company also expects a decrease in research and development expenses as a
result of the termination of certain early and mid-stage discovery programs and
the reduction of related staffing and contract expenses.  This decrease will be
partially offset by the cost of the Phase II clinical trial of ALX-0600 for
gastrointestinal disorders and the Phase III trial in the U.S. of ALX1-11 for
osteoporosis.

                                      K-5
<PAGE>

As a result, Allelix anticipates losses for at least the next two years as the
Company moves its product candidates through the rigorous clinical trial process
toward regulatory approval for marketing.

Capital expenditures for 2000 will be substantially lower than in 1999 as a
result of the move of ANI into new premises in December 1998.  The Company
acquired the premises that were leased in Mississauga, Ontario in March 1999 for
$2.45 million.  The purchase price was funded with debt financing.  All other
significant capital expenditures are being curtailed.

The Company believes that its cash and marketable securities, together with
committed and expected revenue from partners and interest income, will be
sufficient to meet the operating and capital requirements of its existing
programs for at least the next two years.

Risks and Uncertainties

The Company has signed agreements with partners in the pharmaceutical industry,
which provide for royalty payments upon the commercialization of certain Allelix
products.  However, it is very difficult to estimate the timing or extent of
such payments.  There are long lead times involved in development and testing,
as well as stringent government regulatory processes, in jurisdictions around
the world, before a product can be marketed.  The Company has not yet earned
revenues from the sale of products and does not expect to do so in the near
future, although niche products for certain indications may be brought to market
sooner.

The nature and speed of scientific progress, the advancement of pre-clinical
testing and clinical trials and the timing and costs of obtaining regulatory
approvals for its product candidates will determine whether Allelix has
sufficient cash on hand and the future requirements for external funding to
support its long-term product development and commercialization programs.  The
Company will form strategic alliances with established pharmaceutical companies
to enhance its ability to exploit fully its technological strengths and gain
access to worldwide pharmaceutical markets.  The timing and choice of partners
for such collaborations are based primarily on the costs involved in conducting
further trials, the Company's available resources and the ability of the partner
to quickly develop and commercialize the product.  The revenues from research
contracts with pharmaceutical partners are typically of a limited duration and
there is no assurance that they will be renewed.  Changes in existing
collaborative and joint venture relationships, as well as the establishment of
new ones, product licensing efforts and other financing relationships could
materially impact the Company's financial position.  To the extent that the
Company expands therapeutic programs by licensing or acquiring rights to product
candidates or technology, the nature and stage of development of the product
candidates or technology so acquired will determine the Company's ongoing
resource requirements.

Allelix will require additional capital in the future to continue research
programs and to fund development costs, including the costs of conducting
clinical trials.  The Company will decide to issue any debt or additional equity
securities based on market conditions, requirements for funding of its
development programs, the price of the Company's common

                                      K-6
<PAGE>

shares and the relative attractiveness of other financing alternatives. However,
given the nature of the Company's business, there can be no assurances that
adequate funds will be available or that they will be available on terms
acceptable to the Company.

The Company has obtained $20 million of liability insurance for its product
candidates entering clinical trials.  There is no way of determining the
adequacy of such coverage.

Year 2000 Compliance

We continue to assess impact of the year 2000 on our operations and systems.  We
have developed assessment procedures and a plan to address identified issues.  A
Y2K Task Force was assembled in the beginning of 1998 to evaluate the potential
impact of the so called "Year 2000 millennium bug" on our operations.  Since
formation, the task force has monitored the evaluation of financial, accounting,
information management, scientific equipment, and building systems.  To date,
financial, accounting, and information management systems reviews have been
completed.  Those systems which were not compliant have been replaced.  We
continue to assess the impact of the Year 2000 issue on our other systems and
equipment.  We expect to have identified and replaced or updated all internal
systems and equipment which are not Year 2000 compliant before the Year 2000 to
the extent necessary to enable us to continue operations.  We do not expect the
cost of repair or replacement to be material to our operations.  We are also
seeking assurance from primary third-party service and goods suppliers,
including financial institutions, suppliers, CROs and other collaborative
parties that they do not expect the Year 2000 matter to impact materially their
dealings with us.  To date, we are not aware of any critical third-party
suppliers that will not be able to meet our needs in order to maintain
operations.  We cannot assure that these third parties are using systems that
are Year 2000 compliant or will address any Year 2000 issues in a timely
fashion.  Any Year 2000 compliance problems of our suppliers, clinical research
organizations, or our licensees could have a material adverse effect on our
business, operating results, and financial condition.

                                      K-7
<PAGE>

                             MATERIAL CHANGE REPORT

                    S.75(2) OF THE SECURITIES ACT (ONTARIO)
                    S.118(1) OF THE SECURITIES ACT (ALBERTA)
                S.85(1) OF THE SECURITIES ACT (BRITISH COLUMBIA)
                      S.73 OF THE SECURITIES ACT (QUEBEC)
                  S.81(2) OF THE SECURITIES ACT (NOVA SCOTIA)
               S.84(1) OF THE SECURITIES ACT, 1988 (SASKATCHEWAN)
                     S.112 OF THE SECURITIES ACT (MANITOBA)
               S.76(2) OF THE SECURITIES ACT, 1990 (NEWFOUNDLAND)

1. Reporting Issuer

   Allelix Biopharmaceuticals Inc.

2. Date of Material Change

   September 27, 1999

3. News Release

   A news release disclosing the material change was issued on September 28,
1999. A copy of the news release is attached hereto as Exhibit "1".

4. Summary of the Material Change

   Allelix Biopharmaceuticals Inc. ("Allelix") and NPS Pharmaceuticals, Inc.
("NPS") have entered into a definitive arrangement agreement dated September
27, 1999 (the "Arrangement Agreement") pursuant to which NPS Allelix Inc. ("NPS
Allelix"), an indirect, wholly-owned subsidiary of NPS, will acquire, subject
to the terms and conditions set out therein, all of the issued and outstanding
common shares in the capital of Allelix ("Allelix Common Shares") pursuant to a
plan of arrangement (the "Arrangement"). Pursuant to the Arrangement, each
Canadian resident holder of Allelix Common Shares will receive, at his or her
option, 0.3238 fully-paid and non-assessable common shares in the capital of
NPS ("NPS Common Shares") or 0.3238 fully-paid and non-assessable exchangeable
shares in the capital of NPS Allelix ("Exchangeable Shares"), for each Allelix
Common Share held. Holders of Allelix Common Shares who are not Canadian
residents will receive 0.3238 NPS Common Shares for each Allelix Common Share
held and are not entitled to elect to receive Exchangeable Shares. In this
report, where the context permits, references to "Allelix" shall include its
material subsidiaries.

5. Full Description of Material Change

 Overview

   Allelix and NPS have entered into the Arrangement Agreement pursuant to
which NPS Allelix will acquire, subject to the terms and conditions set out
therein, all of the issued and outstanding Allelix Common Shares under the
Arrangement. Pursuant to the Arrangement, each Canadian resident holder of
Allelix Common Shares will receive, at his or her option, 0.3238 NPS Common
Shares or 0.3238 Exchangeable Shares for each Allelix Common Share held.
Holders of Allelix Common Shares who are not Canadian residents will receive
0.3238 NPS Common Shares for each Allelix Common Share held and are not
entitled to elect to receive Exchangeable Shares. Subject to regulatory
approval, it is intended that the Exchangeable Shares will be listed on The
Toronto Stock Exchange ("TSE").

                                      L-1
<PAGE>

   The Exchangeable Shares will be securities of NPS Allelix that entitle their
holders to dividend and other rights that are functionally and economically
equivalent in all material respects to those of the NPS Common Shares. Some of
the principal characteristics of the Exchangeable Shares are as follows:

  .  the right of the holders of Exchangeable Shares at any time to exchange
     these shares for NPS Common Shares on a share-for-share basis (with an
     adjustment for dividends payable, if any);

  .  the continued economic equivalency of the Exchangeable Shares and the
     NPS Common Shares through extensive anti-dilution provisions;

  .  the right to receive dividends, on a per share basis, in amounts (in
     equivalent Cdn. currency) (or property in the case of non-cash
     dividends) which are the same as, and which are payable at the same time
     as, dividends declared on NPS Common Shares;

  .  the right to vote, on a per share equivalent basis, at all stockholder
     meetings at which NPS Common Shares are entitled to vote, through a
     special voting share in the capital of NPS carrying votes equal to the
     number of outstanding Exchangeable Shares which is held by a trustee for
     the benefit of the holders of the Exchangeable Shares; and

  .  the right to participate, on a per share equivalent basis, in a
     liquidation, dissolution or other winding-up of NPS, on a pro rata basis
     with the holders of NPS Common Shares in the distribution of assets of
     NPS, pursuant to a mandatory exchange of Exchangeable Shares for NPS
     Common Shares.

   Pursuant to the Arrangement Agreement, NPS will enter into: (i) a support
agreement (the "Support Agreement") with NPS Allelix and NPS Holdings Limited,
a wholly-owned subsidiary of NPS ("NPS Holdings"), and (ii) a voting and
exchange trust agreement (the "Voting and Exchange Trust Agreement") with NPS
Allelix and a trustee, in order to ensure that the Exchangeable Shares have
equivalent economic and other attributes to the NPS Common Shares. NPS Holdings
has the right pursuant to the Arrangement to purchase from the holders of the
Exchangeable Shares all but not less than all of the then outstanding
Exchangeable Shares in exchange for an equal number of NPS Common Shares i) at
any time that there are fewer than 1,000,000 Exchangeable Shares outstanding
(other than those held by NPS and its affiliates); ii) at any time on or after
the occurrence of certain control transactions (e.g. any merger, amalgamation,
tender offer, material sale of shares, etc.) involving NPS where it is not
reasonably practicable to substantially replicate the existing terms and
conditions of the Exchangeable Shares in connection with such control
transaction; and iii) at any time on or after December 31, 2004.

   The Arrangement requires the approval of the registered shareholders of
Allelix as well as the approval of the Superior Court of Justice (Ontario) (the
"Court"). Accordingly, pursuant to the Arrangement, Allelix and NPS will apply
to the Court for an order approving the Arrangement. In connection with such
application, Allelix and NPS will proceed with an application for an interim
order (the "Interim Order") of the Court providing for, among other things, the
calling and holding of a special meeting of the registered shareholders of
Allelix (the "Allelix Meeting") for the purpose of such holders considering
and, if deemed advisable, approving the Arrangement. In connection with the
Arrangement, it is proposed that Allelix will be continued (the "Continuance")
under the Business Corporations Act (Ontario) ("OBCA"). Accordingly, the
registered shareholders of Allelix will also be asked to consider and, if
deemed advisable, approve a resolution authorizing the Continuance. Subject to
obtaining the approval of the registered shareholders of Allelix of the
Arrangement and the Continuance as contemplated by the Interim Order, Allelix
and NPS will take all remaining steps necessary to submit the Arrangement to
the Court and to apply for a final order of the Court (the "Final Order").

   Both the Arrangement and the Continuance must be approved by a specified
majority of the votes cast at the Allelix Meeting (likely to be two-thirds of
the votes cast unless the Court provides otherwise in the Interim Order). NPS
will also hold a meeting of the registered holders of NPS Common Shares (the
"NPS Meeting") where such holders will consider and, if determined advisable,
approve, among other things: (i) an amendment to the articles of incorporation
of NPS to increase the number of NPS Common Shares authorized for issuance;

                                      L-2
<PAGE>

and (ii) the issuance of NPS Common Shares in connection with the Arrangement,
such shares being listed on the NASDAQ.

 Arrangement Agreement

   The following is a summary of the material terms of the Arrangement
Agreement and as such is qualified in its entirety by the Arrangement Agreement
which is attached hereto as Exhibit "2".

   Allelix--No Soliciting Other Offers

   Without the prior written consent of NPS, from and after the date of the
Arrangement Agreement, Allelix and its subsidiaries will not, and will not
authorize or permit any of their officers, directors, employees, financial
advisors, representatives and agents (the "Representatives") to, directly or
indirectly, solicit, initiate or encourage (including by way of furnishing
information) or take any other action to facilitate any enquiries or the making
of any proposal which constitutes or may reasonably be expected to lead to an
Acquisition Proposal (as defined below) from any person, or engage in any
discussions or negotiations relating thereto or accept any Acquisition
Proposal.

   Notwithstanding the above however, Allelix may at any time prior to the time
the holders of the Allelix Common Shares shall have voted to approve the
Arrangement and the other transactions contemplated thereby, engage in
discussions or negotiations with a third party who (without any solicitation,
initiation, or encouragement, directly or indirectly, by Allelix, any of its
subsidiaries or the Representatives after the date of the Arrangement
Agreement) seeks to initiate such discussions or negotiations and may furnish
such third party information concerning Allelix and its business, properties
and assets if and only to the extent that:

     (i) the third party has (A) first made an Acquisition Proposal that is
  financially superior to the transaction contemplated by the Arrangement
  Agreement which, in any event, shall mean that such proposal shall offer a
  value per Allelix Common Share greater than the per share value
  attributable thereto under the transaction contemplated by the Arrangement
  Agreement and (B) demonstrated that the funds or other consideration
  necessary for the Acquisition Proposal are reasonably likely to be
  available (as determined in good faith, in each case by Allelix's board of
  directors after receiving the advice of its financial advisors to this
  effect in writing or recorded in the minutes) (a "Superior Proposal") and
  Allelix's board of directors has concluded in good faith, after considering
  the applicable law and receiving the advice of outside counsel to this
  effect in writing or recorded in the minutes, that such action is necessary
  for the board of directors to act in a manner consistent with its fiduciary
  duties under the applicable law; and

     (ii) prior to furnishing such information to or entering into
  discussions or negotiations with such person or entity, Allelix provides
  prompt notice to NPS to the effect that it is furnishing information to or
  entering into discussions or negotiations with such person or entity and
  receives from such person or entity an executed confidentiality and
  restricted use agreement in reasonably customary form.

   Pursuant to the Arrangement Agreement, Allelix is obligated to notify NPS
orally and in writing of any enquiries, offers or proposals with respect to an
Acquisition Proposal (including, without limitation, terms and conditions of
any such proposal, the identity of the person making it and all other
information reasonably requested by NPS) within 12 hours of the receipt
thereof, shall answer NPS's questions with respect to such enquiries, offers or
proposals and shall give NPS five days advance notice of any agreement to be
entered into with, or information to be supplied to, any person making such
enquiry, offer or proposal.

   Allelix has covenanted that it will not enter into any agreement regarding a
Superior Proposal (the "Proposed Agreement") without providing NPS with an
opportunity to amend the Arrangement Agreement to provide for a value per
Allelix Common Share at least equal to that included in the Proposed Agreement
(as determined in good faith by Allelix's board of directors after receiving
the advice of its financial advisors to

                                      L-3
<PAGE>

this effect in writing or recorded in the minutes). In particular, Allelix has
covenanted to provide NPS with a copy of any Proposed Agreement as executed by
the party making the proposal at least 72 hours prior to its proposed execution
by Allelix. In the event that NPS decided to amend the Arrangement Agreement as
provided above, Allelix has covenanted that it will not enter into the Proposed
Agreement.

   "Acquisition Proposal" is defined in the Arrangement Agreement to mean a
written proposal or offer by any person to acquire beneficial ownership of all
or a material portion of the assets of Allelix (including shares of its
subsidiaries) or one or more of its subsidiaries or not less than 10 percent of
the Allelix Common Shares or of one or more of its subsidiaries pursuant to an
amalgamation, plan of arrangement, consolidation or other business combination,
sale of shares or other securities, sale of assets, take-over bid or tender
offer or exchange offer or similar transaction involving Allelix or one or more
of its subsidiaries including, without limitation, any single or multi-step
transaction or series of related transactions which is structured to permit
such third party to acquire beneficial ownership or any material portion of the
assets of, or such percentage of the Allelix Common Shares or one or more of
its subsidiaries (other than transactions contemplated by the Arrangement
Agreement).

   NPS--No Shop

   Without the prior written consent of Allelix, NPS and its subsidiaries will
not, and will not authorize or permit any of their officers, directors,
employees, financial advisors, representatives and agents to, directly or
indirectly, solicit, initiate or encourage or take any other action to
facilitate any enquiries or the making of a proposal which constitutes or may
be reasonably expected to lead to an NPS Acquisition Proposal, which is defined
in the Arrangement Agreement to be a written proposal or offer by any person to
acquire not less than 20 percent of the NPS Common Shares by business
combination, sale of issued or treasury shares or tender or exchange offer or
similar transaction, including, without limitation, any single or multi-step
transaction or series of related transactions which are structured to permit a
person to acquire such NPS Common Shares. However, NPS may engage in
discussions or negotiations at any time with a third party who seeks to
initiate such discussions and may furnish such a third party with information
concerning NPS if the board of directors of NPS has concluded, after
considering applicable law and receiving the advice of counsel in writing, in
good faith that such action is necessary for the board of directors to act in a
manner consistent with its fiduciary duties.

   Access

   NPS will be entitled, on reasonable notice to Allelix, to access Allelix's
premises and will be entitled to meet with Allelix's shareholders, creditors,
licensors, licensees and employees. Allelix and its subsidiaries must keep NPS
fully informed as to its and its subsidiaries' business and affairs and as to
the decisions required with respect to the most advantageous methods of
operating and producing from its and its subsidiaries' assets.

   Topping Fee/Break Fee

   Allelix is obligated to pay to NPS a U.S.$2,000,000 topping fee if any of
the following occur:

     (i) Allelix breaches its covenants or agreements in the Arrangement
  Agreement in any material respect;

     (ii) NPS terminates the Arrangement Agreement because the board of
  directors of Allelix has withdrawn or varied in a manner determined by NPS
  to be adverse, its approval of the Arrangement Agreement or the Arrangement
  or its unanimous recommendation to the holders of Allelix Common Shares
  unless the board of directors of Allelix has so acted because of a material
  adverse change affecting NPS, and such change is not attributable to a
  material adverse change affecting Allelix;

     (iii) Allelix terminates the Arrangement Agreement in order to enter
  into a definitive written agreement with respect to a Superior Proposal; or

                                       L-4
<PAGE>

     (iv) an Acquisition Proposal is announced (in this instance, the
  reference to 10 percent of the Allelix Common Shares in the definition of
  Acquisition Proposal shall be deemed to be a reference to 20 percent of the
  Allelix Common Shares), the holders of the Allelix Common Shares do not
  approve the Arrangement at the Allelix Meeting, and a significant
  transaction involving the acquisition of a material portion of the assets
  of Allelix or one or more of its subsidiaries or Allelix Common Shares so
  as to hold not less than 20 percent or more of the Allelix Common Shares
  outstanding is completed with the person who made the Acquisition Proposal
  within the twelve months following the date of the Allelix Meeting.

   NPS is obligated to pay to Allelix a break fee of U.S.$1,000,000 in the
event that NPS breaches a covenant or agreement on its part in the Arrangement
Agreement in any material respect, or the holders of the NPS Common Shares do
not approve the matters relating to the Arrangement considered at the NPS
Meeting except following a material adverse change affecting Allelix. The
break fee shall be increased to U.S.$2,000,000 in the event that the board of
directors of NPS withdraws or varies its unanimous recommendation to the
holders of NPS Common Shares in a manner determined by Allelix to be adverse
to Allelix, otherwise than because of a material adverse change affecting
Allelix.

   Standstill

   Each of Allelix and NPS has agreed that neither it nor an affiliate will,
prior to June 27, 2000, without the prior written consent of the other party,
among other things:

     (i) acquire, offer or agree to acquire, directly or indirectly, by
  purchase or otherwise, individually or in concert with any other person,
  any voting securities or securities convertible into or exchangeable for
  voting securities, of the other party;

     (ii) directly or indirectly make, or in any way participate in, any
  solicitation of proxies to vote, or seek to advise or influence any other
  person with respect to the voting of any voting securities of the other
  party; or

     (iii) act alone or in concert with others to seek to control the
  management, directors or corporate policies of the other party.

   The above restrictions will not apply in the event an offer is made (and
not withdrawn at the time the conduct otherwise prohibited by the foregoing
has commenced) to acquire beneficial ownership of all or a material portion of
the assets of the other party or one or more of its subsidiaries or not less
than 20 percent of the issued and outstanding common shares of the other party
pursuant to a transaction to be considered at a meeting of security holders
requisitioned by a security holder of such other party or pursuant to a take-
over bid, tender offer, or similar transaction involving the other party.

   Termination

   The Arrangement Agreement may be terminated by:

     (i) the delivery by one party to another of a written notice stating
  that a condition precedent for the benefit of the party initiating such
  notice has not been fulfiled or satisfied within the time contemplated by
  the Arrangement Agreement and that the Arrangement Agreement is accordingly
  terminated;

     (ii) NPS if the board of directors of Allelix has withdrawn or varied in
  a manner determined by NPS to be adverse to NPS, approval of the
  Arrangement Agreement or the Arrangement or its unanimous recommendation to
  the holders of Allelix Common Shares;

     (iii) Allelix if the board of directors of NPS has withdrawn its
  unanimous recommendation to the holders of the NPS Common Shares to vote in
  favour of the resolutions contemplated in the Arrangement Agreement to be
  considered at the NPS Meeting;

     (iv) Allelix in order to enter into a definitive written agreement with
  respect to a Superior Proposal;

                                       L-5
<PAGE>

     (v) the mutual agreement of Allelix and NPS (without further action on
  the part of the holders of the Allelix Common Shares if terminated after
  the holding of the Allelix Meeting); or

     (vi) either NPS or Allelix if there has been passed any law or
  regulation that makes consummation of the transactions contemplated by the
  Arrangement Agreement illegal or otherwise prohibited or if any injunction,
  order or decree enjoining NPS or Allelix from consummation of the
  transactions contemplated by the Arrangement Agreement is entered into and
  such injunction, order or decree becomes final and non-applicable.

   Mutual Conditions to Closing

   The Arrangement Agreement provides that the respective obligations of each
of Allelix and NPS to complete the transactions contemplated therein are
subject to the satisfaction, on or before the Effective Date or at such other
specified time, of a number of conditions precedent, including the following:

     (i) the Interim Order shall have been granted in form and substance
  satisfactory to Allelix and NPS, acting reasonably, on or before October
  31, 1999 and shall not have been set aside or modified in a manner
  unacceptable to such parties on appeal or otherwise;

     (ii) the resolution approving the Arrangement shall have been duly
  approved by the required majority of the holders of Allelix Common Shares,
  with or without amendment, in accordance with the Interim Order, on or
  before January 20, 2000;

     (iii) each of the resolutions considered at the NPS Meeting shall have
  been duly approved by the required majority without amendment on or before
  January 20, 2000;

     (iv) Allelix shall have obtained articles of continuance from the
  Director appointed under section 278 of the OBCA (the "OBCA Director") in
  form and substance satisfactory to Allelix and NPS, acting reasonably;

     (v) the Final Order shall have been granted in form and substance
  satisfactory to Allelix and NPS, acting reasonably, on or before January
  31, 2000, and shall not have been set aside or modified in a manner
  unacceptable to such parties on appeal or otherwise;

     (vi) the articles of arrangement relating to the Arrangement shall be in
  form and substance satisfactory to Allelix and NPS, acting reasonably;

     (vii) the Effective Date shall be on or before January 31, 2000;

     (viii) (A) no act, action, suit or proceeding shall have been taken or
  be outstanding before or by any domestic or foreign court or tribunal or
  governmental agency or other regulatory authority or administrative agency
  or commission by any elected or appointed public official or private person
  (including, without limitation, any individual, corporation, firm, group or
  other entity) in Canada or elsewhere, whether or not having the force of
  law, and (B) no law, regulation or policy shall have been proposed,
  enacted, promulgated or applied which, in either case, has effect, or may
  have effect, to cease trade, enjoin, or prohibit the acquisition by NPS of
  the Allelix Common Shares, or the right of NPS to own or exercise full
  rights of ownership of the Allelix Common Shares, or the issuance, pursuant
  to the Arrangement, of NPS Common Shares and Exchangeable Shares to the
  holders of Allelix Common Shares;

     (ix) there shall not exist any prohibition at law against NPS or Allelix
  and the holders of Allelix Common Shares consummating the Arrangement;

     (x) Allelix and NPS shall have obtained the consents, approvals and
  authorizations referred to in Section 3.18 of the Arrangement Agreement and
  such other material consents, approvals and authorizations (if any),
  regulatory or otherwise, required or necessary in connection with the
  transactions contemplated therein on terms and conditions satisfactory to
  each of them, acting reasonably;

                                      L-6
<PAGE>

     (xi) the Exchangeable Shares issuable pursuant to the Arrangement shall
  have been conditionally approved for listing on the TSE subject to the
  filing of the usual and customary documentation;

     (xii) any required orders from applicable securities authorities
  authorizing the issue of the Exchangeable Shares shall have been obtained
  on terms satisfactory to NPS and Allelix, both acting reasonably;

     (xiii) there shall not have occurred any actual or threatened change
  (including a proposal by the Minister of Finance of Canada to amend the ITA
  or any announcement, governmental or regulatory initiative, condition,
  event or development involving a change or a prospective change) that, in
  the judgment of NPS, acting reasonably, directly or indirectly, has or may
  have a material adverse effect with respect to consummating the proposed
  transaction; and

     (xiv) holders of not more than 10 percent of Allelix's Common Shares
  shall have exercised Dissent Rights (as defined in the Arrangement
  Agreement).

   Conditions to Closing for the Benefit of Allelix

   The Arrangement Agreement provides that the obligation of Allelix to
complete the transactions contemplated therein is subject to the satisfaction
or waiver, where permissible, of a number of additional conditions, including
the following:

     (i) the representations and warranties made by NPS in the Arrangement
  Agreement shall be true as of the Effective Date as if made on and as of
  such date and NPS shall have provided to Allelix the certificate of one
  senior officer of NPS certifying such accuracy on the Effective Date (and
  Allelix shall have no knowledge to the contrary);

     (ii) NPS shall have provided Allelix with opinions of NPS's counsel and
  addressed to Allelix and Allelix's counsel as required pursuant to the
  Arrangement Agreement;

     (iii) the appointment of three Allelix directors, to be jointly
  designated by NPS and Allelix, acting reasonably, to the board of directors
  of NPS;

     (iv) NPS shall have complied with its covenants in the Arrangement
  Agreement and shall have provided to Allelix the certificate of a senior
  officer of NPS certifying that NPS has complied with its respective
  covenants therein and Allelix shall have no knowledge to the contrary;

     (v) between the date of the most recent public disclosure by NPS and the
  Effective Date, there shall not have occurred any material adverse change
  with respect to NPS that is not attributable to a material adverse change
  with respect to Allelix;

     (vi) NPS, NPS Holdings and NPS Allelix shall have entered into the
  Support Agreement; and

     (vii) NPS, NPS Allelix and a trust company acceptable to NPS and
  Allelix, acting reasonably, shall have entered into the Voting and Exchange
  Trust Agreement.

   Conditions to Closing for the Benefit of NPS

   The Arrangement Agreement provides that the obligation of NPS to complete
the transactions contemplated therein is subject to the satisfaction or waiver,
where permissible, of a number of additional conditions, including the
following:

     (i) the representations and warranties made by Allelix in the
  Arrangement Agreement shall be true as of the Effective Date as if made on
  and as of such date and Allelix shall have provided to NPS a certificate of
  the Chairman of the board of directors of Allelix and the Chief Executive
  Officer (or such other officer of Allelix that may be acceptable to NPS,
  acting reasonably) certifying such accuracy on the Effective Date (and NPS
  shall have no knowledge to the contrary);

                                      L-7
<PAGE>

     (ii) Allelix shall have provided NPS with an opinion of Allelix's
  counsel in form and substance satisfactory to NPS, acting reasonably dated
  the Effective Date (or such other date as Allelix and NPS may agree) and
  addressed to NPS and NPS's counsel as required pursuant to the Arrangement
  Agreement;

     (iii) Allelix shall have complied, in all material respects, with its
  covenants in the Arrangement Agreement and Allelix shall have provided to
  NPS a certificate of the Chairman of the board of directors of Allelix and
  the Chief Executive Officer (or such other officer of Allelix that may be
  acceptable to NPS, acting reasonably) certifying that Allelix has complied
  with its covenants therein and NPS shall have no knowledge to the contrary;

     (iv) the Interim Order, the Final Order and any required orders from the
  applicable securities commissions authorizing the issuance of the
  Exchangeable Shares shall have been obtained on terms satisfactory to NPS,
  acting reasonably;

     (v) between the date of the most recent public disclosure by Allelix,
  and the Effective Date, there shall not have occurred any material adverse
  change with respect to Allelix; and

     (vi) the directors of Allelix and its subsidiaries shall have tendered
  their resignations to be effective on the Effective Date.

   Mutual Representations and Warranties

   The Arrangement Agreement contains a number of mutual representations and
warranties of Allelix and NPS, relating to, among other things: (i) the
corporate existence, organization and qualification of each of Allelix and NPS;
(ii) authorization, execution, delivery and enforceability of the Arrangement
Agreement; (iii) the absence of any violations, conflicts, breaches, defaults,
rights, encumbrances, suspensions, revocations or lack of consents, approvals
or notices which would have a material adverse effect on the party giving the
representation and warranty; (iv) the absence of any outstanding actions,
suits, proceedings or investigations, either commenced, contemplated or
threatened against either of Allelix or NPS, including their respective
subsidiaries, which could reasonably be expected to have a material adverse
effect on the party giving the representation and warranty; (v) financial
statements; (vi) minute books and records; (vii) the filing of tax returns and
the payment of taxes; (viii) the maintenance of insurance; (ix) environmental
matters; (x) employment agreements and labour matters; (xi) the obtaining by
Allelix and NPS of various consents and approvals except where the failure to
obtain such consent or approval would not constitute a material adverse effect
to the party giving the representation and warranty; and (xii) intellectual
property rights.

   Representations and Warranties of Allelix

   The Arrangement Agreement contains a number of additional representations
and warranties of Allelix relating to, among other things: (i) the
capitalization of Allelix; (ii) the status of Allelix as a reporting issuer
under the securities laws of each province of Canada and the listing of all
issued and outstanding Allelix Common Shares on the TSE (issuable Allelix
Common Shares are listed on the TSE subject to issuance); (iii) the truth and
correctness of the material provided by Allelix for inclusion in the
information circular of NPS; and (iv) the 1999 audited financial statements of
Allelix. Allelix has also represented and warranted that the board of directors
of Allelix has: i) unanimously determined that the Arrangement is fair to the
holders of Allelix Common Shares and that the Arrangement is in the best
interests of Allelix and the holders of Allelix Common Shares; ii) approved the
Arrangement and the entering into and execution of the Arrangement Agreement;
and iii) resolved to recommend that the holders of the Allelix Common Shares
vote in favour of the Arrangement.

   Representations and Warranties of NPS

   The Arrangement Agreement contains a number of additional representations
and warranties of NPS relating to, among other things, (i) the capitalization
of NPS; (ii) the status of NPS as a reporting company

                                      L-8
<PAGE>

under the U.S. Securities Exchange Act of 1934, as amended; and (iii) the truth
and correctness of the material provided by NPS for inclusion in the
information circular of Allelix. NPS has also represented and warranted that
the board of directors of NPS has unanimously approved the Arrangement
Agreement and has determined to recommend that the holders of the NPS Common
Shares vote in favour of the matters contemplated in the Arrangement Agreement
to be voted on at the NPS Meeting.

   Mutual Covenants

   Each of Allelix and NPS has covenanted, among other things, that, until the
Effective Date or the date upon which the Arrangement Agreement is terminated,
whichever is earlier, they will:

     (i) use all reasonable commercial efforts to satisfy the conditions
  precedent to their respective obligations set out in the Arrangement
  Agreement and to do all other things necessary, proper or advisable under
  applicable laws to complete the Arrangement, including using all reasonable
  commercial efforts to obtain all necessary waivers, consents, approvals and
  authorizations required to be obtained under loan agreements, leases, other
  contracts or under applicable law and to effect all necessary registrations
  and filings and submissions of information requested by governmental
  authorities required to be effected in connection with the Arrangement;

     (ii) make available and cause to be made available to the other party,
  their agents and advisors, all documents and agreements in any way relating
  to or affecting their business, financial condition, operations, prospects,
  properties, assets or affairs, except where they are contractually
  precluded from making such document or agreement available in which case
  they shall co-operate with the other party in securing access to any such
  documentation not in their possession or under their control;

     (iii) not take any action, refrain from taking any action or permit any
  action to be taken or not taken, inconsistent with the Arrangement
  Agreement or which might, directly or indirectly, interfere with or
  adversely affect the consummation of the Arrangement; and

     (iv) not, during the period commencing on the date of the Arrangement
  Agreement and ending on the earlier of the Effective Date of the
  Arrangement and the second anniversary of the termination of the
  Arrangement Agreement, directly or indirectly solicit, induce, recruit or
  encourage any of the other party's employees to terminate their employment
  with the other party or attempt to solicit, induce or recruit employees of
  the other party.

   Covenants of Allelix

   Allelix has covenanted and agreed, among other things, that, until the
Effective Date or the date on which the Arrangement Agreement is terminated,
whichever is earlier, it will:

     (i) in a timely and expeditious manner and as soon as reasonably
  practicable, but in any event not later than October 31, 1999, file,
  proceed with and prosecute an application to the Court under the Canada
  Business Corporations Act and/or the OBCA, as required, for the Interim
  Order with respect to the Arrangement;

     (ii) in a timely and expeditious manner and as soon as reasonably
  practicable, carry out the terms of the Interim order; prepare and file the
  notice of meeting and management information circular of Allelix (the
  "Information Circular") prepared in connection with the Allelix Meeting;
  allow NPS and its counsel to participate fully in preparation of the
  Information Circular; convene the Allelix Meeting; solicit proxies to be
  voted at the Allelix Meeting in favour of the Arrangement; provide notice
  to NPS of the Allelix Meeting and allow NPS's representatives to attend the
  Allelix Meeting; and conduct the Allelix Meeting in accordance with the
  Interim Order, the by-laws of Allelix and any instrument governing such
  meeting;

     (iii) in a timely and expeditious manner and, in any event not later
  than October 20, 1999, deliver to NPS the audited financial statements
  prepared in respect of its fiscal year ended August 31, 1999;

                                      L-9
<PAGE>

     (iv) subject to the approval of the Arrangement at the Allelix Meeting
  in accordance with the provisions of the Interim Order, file, proceed with
  and prosecute an application for the Final Order;

     (v) forthwith carry out the terms of the Final Order and, subject to the
  receipt of the Final Order, will file the articles of arrangement and the
  Final Order with the OBCA Director in order for the Arrangement to become
  effective on or before January 31, 2000;

     (vi) subject to approval of the resolution relating to the Continuance
  at the Allelix Meeting, file articles of continuance with the OBCA
  Director;

     (vii) not to incur significant new capital expenditures above specified
  levels;

     (viii) not to incur any indebtedness for borrowed money; and

     (ix) not to enter into or agree to enter into any licence agreement,
  collaboration and/or development agreement or any other agreement to sell,
  convey, transfer, assign or encumber any of its right, title or interest in
  any of its research, pre-clinical or clinical development programs.

   Covenants of NPS

   NPS has covenanted and agreed, among other things, that, until the
Effective Date or the date on which the Arrangement Agreement is terminated,
whichever is earlier, it will:

     (i) not issue NPS Common Shares at a price which is less than the then
  current market price on their date of issue, less 10 percent, except upon
  the exercise of NPS options;

     (ii) allow Allelix and its counsel to participate fully in the
  preparation of the notice of meeting and management information circular of
  NPS prepared in connection with the NPS Meeting;

     (iii) in a timely and expeditious manner and as soon as practicable but
  in any event not later than January 15, 2000, convene the NPS Meeting;

     (iv) solicit proxies to be voted at the NPS Meeting in favour of the
  matters to be considered thereat;

     (v) provide notice to Allelix of the NPS Meeting and allow Allelix's
  representatives to attend the NPS Meeting;

     (vi) to the extent within its power, forthwith carry out the terms of
  the Interim Order and the Final Order;

     (vii) to appoint three Allelix directors to the board of directors of
  NPS mutually acceptable to Allelix and NPS, acting reasonably;

     (viii) not to acquire or agree to acquire (by acquisition of securities
  or assets or otherwise) any corporation, partnership or other business
  organization or division or any assets or properties for consideration of
  more than U.S.$4,000,000 in total; and

     (ix) except with the prior written consent of Allelix, to cause it and
  its subsidiaries to use all reasonable efforts to preserve intact their
  present business, licenses and permits and to not, nor permit its
  subsidiaries to enter into any transaction out of the ordinary course of
  business if the total obligations and commitments of NPS and its
  subsidiaries thereunder exceed U.S.$4,000,000.

6. Reliance on Confidentiality Provisions of Securities Legislation

   Not applicable.

7. Omitted Information

   No information has been omitted in respect of the material change.

                                     L-10
<PAGE>

8. Senior Officers

   For further information, please contact:

   Paul J. Van Damme
   Senior Vice-President and Chief Financial Officer

   Telephone: (905) 677-0831

9. Statement of Senior Officer

   The foregoing accurately discloses the material change referred to herein.

   DATED at Toronto, this 6th day of October, 1999.


                                                  /s/ James Howard-Tripp
                                          _____________________________________
                                                   James Howard-Tripp
                                           Senior Vice-President, Neuroscience

   IT IS AN OFFENCE FOR A PERSON TO MAKE A STATEMENT IN A DOCUMENT REQUIRED TO
BE FILED OR FURNISHED UNDER THIS ACT OR THIS REGULATION THAT, AT THE TIME AND
IN LIGHT OF THE CIRCUMSTANCES UNDER WHICH IT IS MADE, IS A MISREPRESENTATION.

                                      L-11
<PAGE>

                           NPS PHARMACEUTICALS, INC.
                        SPECIAL MEETING OF STOCKHOLDERS
                               DECEMBER 15, 1999

              PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

  The undersigned constitutes and appoints Hunter Jackson and James U. Jensen
(with full power to act alone), the attorneys and proxies of the undersigned,
with power of substitution to each, to vote all shares of common stock of NPS
Pharmaceuticals, Inc., registered in the name provided herein which the
undersigned is entitled to vote, at a Special Meeting of Stockholders. This
meeting will be held at the offices of NPS Pharmaceuticals, Inc. located at 420
Chipeta Way, Salt Lake City, Utah on December 15, 1999 at 10:00 a.m. (local
time). This Proxy is given in accordance with the following instructions, and
carries discretionary authority related to any and all other matters that may
come before the meeting and any adjournments thereof.

  1. To approve the issuance of shares of NPS common stock, $0.001 par value
     per share, in connection with the Arrangement Agreement, dated as of
     September 27, 1999, by and among Allelix Biopharmaceuticals Inc. and NPS
     Pharmaceuticals, Inc. as set forth in the Proxy Statement:

                          [_] FOR[_] AGAINST[_] ABSTAIN

  2. To approve an amendment to the Certificate of Incorporation of NPS
     increasing the total number of shares of capital stock that NPS is
     authorized to issue from 25,000,000 shares to 50,000,000 shares and the
     total number of shares of common stock authorized for issuance thereunder
     to 45,000,000 shares from 20,000,000 shares.

                          [_] FOR[_] AGAINST[_] ABSTAIN
This Proxy when properly executed will be voted as directed above. If no
direction is made, this Proxy will be voted FOR the issuance of shares of NPS
common stock, in connection with the Arrangement Agreement between Allelix
Biopharmaceuticals Inc. and NPS Pharmaceuticals, Inc.; FOR the approval of an
amendment to the Certificate of Incorporation of NPS increasing the total
number of shares of capital stock that NPS is authorized to issue from
25,000,000 shares to 50,000,000 shares and the total number of shares of common
stock authorized for issuance thereunder to 45,000,000 shares from 20,000,000
shares.

                              Dated ___________________________________________
                              -------------------------------------------------
                              -------------------------------------------------
                                              Please sign here

                              Do you plan to attend the Special
                              Meeting? [_] Yes  [_] No

                              Please date this Proxy and sign your name
                              exactly as it appears hereon. Joint owners
                              should each sign. When signing as an agent,
                              attorney, administrator, executor, guardian, or
                              trustee, please indicate your title as such. If
                              executed by a corporation, the Proxy should be
                              signed in the corporate name by a duly
                              authorized officer who should indicate his
                              title. Please date, sign, and mail this proxy
                              card in the enclosed envelope.


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