Exhibit 10.14

*** Indicates portions subject to a request for confidential treatment and 
    filed separately with the Commission.


                 SECOND AMENDED AND RESTATED PRODUCT DEVELOPMENT
                           AND DISTRIBUTION AGREEMENT

This Second Amended and Restated Product Development and Distribution Agreement
(the "Agreement") is made as of this 1st day of May, 1996,

by and between

ASTRA AB, formerly known as AB ASTRA, a corporation organized under the laws of
Sweden, having its principal office at Vastra Malarehamnen 9, S-151 36
Sodertalje, Sweden ("ASTRA"),

and

T CELL SCIENCES INC., a corporation organized under the laws of the State
of Delaware, U.S.A., having its principal place of business at 119 Fourth 
Avenue, Needham, MA 02194-0771 U.S.A. ("TCS").


                                R E C I T A L S:

This Agreement was originally made as of January 30, 1992, amended by Amendment
No. 1 dated as of June 30, 1992, and amended and restated by the First Amended
and Restated Product Development and Distribution Agreement dated as of December
10, 1993 ("First Amended and Restated Agreement"). The parties intend in this
Agreement to further amend and restate the prior Agreement and to supersede the
prior Agreement, as amended and restated, including the TCAR Division Amendment.

TCS possesses rights to developments and technology, patents, patent
applications and know-how (including without limitation patents, patent
applications and know-how relating to compounds described in Exhibit F hereto)
and certain biological processes, all of which constitute TCAR Technology.

ASTRA and TCS have been and are working jointly and exclusively with one
another, using their respective skilled personnel and facilities for the further
development of TCAR Technology into Products suitable for commercial sale in the
Field of Use.


                                      1(28)





The parties have been and are cooperating with each other and using their
resources, expertise and capabilities to assist in the discovery and development
of Agents and Products, and they have been and are using their regulatory,
manufacturing and marketing expertise and capabilities in the pharmaceutical
industry to develop, manufacture, market and distribute Products as described
herein.

The parties now desire to restructure the collaboration by transferring with
exception for certain retained rights all rights in TCAR Technology held by TCS
to ASTRA and by ASTRA assuming responsibility for (a) maintaining and expanding
TCAR Technology, (b) developing Agents and Products, and (c) otherwise employing
its regulatory, manufacturing, marketing and sales expertise to develop,
manufacture, market and sell Products, subject to the rights of and obligations
to TCS and to the other conditions set forth herein.

Each party intends to perform its obligations under this Agreement in good
faith, in a commercially reasonable, diligent and workmanlike manner.

NOW, THEREFORE, for and in consideration of the mutual covenants contained
herein and for other consideration, the receipt and adequacy of which is hereby
acknowledged, the parties agree as follows:

1             CERTAIN DEFINITIONS

Certain capitalized terms used herein are defined as follows:

"Affiliate" shall mean, with reference to a particular Person, (i) any Person
owning or controlling, directly or indirectly, fifty-one percent (51%) or more
of the voting capital shares or similar voting rights of such Person; and (ii)
any Person fifty-one percent (51%) or more of the voting capital shares or
similar voting rights of which is owned or controlled, directly or indirectly,
by such Person. For the purpose of this Agreement the term ASTRA shall include
Affiliates of ASTRA and the term TCS shall include Affiliates of TCS.

"Agent" shall mean a TCAR molecule or an antibody, particularly a monoclonal
antibody reacting against a TCAR, as well as any fragment, derivative,
conjugate, analogue, salt or salt complex of either of the foregoing and leading
to inactivation, elimination or reduction of body levels of T cells carrying the
TCAR, such as the proteins conceptually described in the various TCS Patents and
University Patents.


                                      2(28)





"Effective Date" shall mean May 1, 1996.

"Exclusive" shall mean, when used in connection with a specific grant of a right
hereunder, that the granting party shall have no further right to grant to Third
Parties or Affiliates the same right, and itself retains no such rights in
respect of same, and for the term of the grant, unless such rights are
specifically retained by the grantor.

"Field of Use" shall mean the therapeutic or prophylactic use of Agents and
Products for all indications of use. Field of Use shall not include diagnostic
uses of Agents, Products or TCAR Technology.

"IND" shall mean an Investigational New Drug application, as defined by the
United States Food and Drug Act, or its equivalent under the laws of any other
country.

"Institutes Standby License" shall mean the Stand-by licenses referred to in
Exhibit D.

"NDA" shall mean a New Drug application as defined by the United States Food and
Drug Act, or the equivalent application for approval to market and/or sell
Product under the laws of any other country.

"Net Sales" shall mean the gross amounts (i) invoiced by ASTRA for sales of
Products to any Person unrelated to ASTRA, such as a wholesaler or hospital, and
(ii) invoiced by ASTRA for royalty and lump-sum payments from licensing/sub-
licensing rights under the TCS Patents and/or University Patents to any Person
unrelated to ASTRA, all less the following:

    -         trade and/or quantity discounts actually allowed and taken
    -         returns and cash discounts
    -         retroactive price reductions
    -         sales and similar taxes
    -         freight handling, distribution costs separately billed

"Patent Period" shall mean on a country by country basis and with respect to
each Product or Agent the expiration of the last to expire of any issued TCS
Patent and University Patent in the market where the Product or Agent is
intended to be administrated to a patient and where such patent contains a valid
claim covering (i) Product or such Agent per se or (ii) a composition of matter
containing a therapeutically effective amount of such Product or Agent or (iii)
one or more genes or genetic material from which the Product or Agent is
expressed or (iv) the therapeutic use of such Agent or Product, as opposed to



                                      3(28)




claims merely covering, e.g. production methods or pharmaceutical formulations.

"Person" shall mean any individual, estate, trust, partnership, joint venture,
association, firm, corporation, company or other legal entity.

"Product" shall mean each and any form of an Agent or combinations of Agents or
solely for purposes of Article 8 any other product covered by a valid claim in
the TCS Patents or University Patents anywhere in the Territory for which
material for non-exploratory, non-clinical or clinical documentary studies has
been produced not later than December 31, 2005 and which before or thereafter
has been approved by a regulatory authority of any country for commercial
marketing and sale in that country (including price approval if necessary) for
any indication in the Field of Use.

"Protected Agent" shall mean an Agent covered by a valid claim in the TCS
Patents or University Patents anywhere in the Territory prior to or after the
Effective Date.

"Service Agreement" shall mean the Agreement between the parties exhibited to
this Agreement as Exhibit E.

"TCAR" shall mean a T cell antigen receptor, which is a heterodimeric protein
molecule expressed by human T cells that is capable of recognition both of
antigens and major histocompatility proteins. The gene encoding the T cell
antigen receptor protein is encoded by DNA possessing at least three of the
following four gene segments: Variable, Joining, Diversity and Constant (as such
terms are defined in the Encyclopedia of Human Biology published by Academic
Press U.S.A (copyright 1991)).

"TCAR Technology" shall mean TCS Patents, University Patents and any and all
information, know-how, material or living material including without limitation
biological, pharmacological, preclinical, clinical, chemical, biochemical,
toxicological, formulation, manufacturing and production information and
know-how (in the form of laboratory notebooks, reports or in any other form and
whether or not patentable) developed, acquired or licensed to date by TCS and
relevant to an Agent or Product, or relevant to the manipulation or other use,
production or manufacture of either TCARs, Agents or Products. TCAR Technology
shall include, but not be limited to, all items listed in Exhibits A, B, C, D
and F.

"TCS Licenses" means the licenses referenced on Exhibit D hereto. It is
specifically agreed that the T Cell Antigen Receptor Monoclonal Antibody
License Agreement of February 6, 1990 between Dr. Arthur Boylston and T Cell


                                      4(28)




Sciences, Inc is not included in the TCS Licenses.

"TCS Patents" shall mean issued patents and patent applications listed in
Exhibit A and future patents resulting from such applications as well as any and
all divisions, continuations, continuations-in-part, extensions including
Supplementary Protection Certificates and reissues of all such patents and
patent applications.

"Term" shall have the meaning set forth in Paragraph 9.1 hereof.

"Territory" shall mean the entire world.

"Third Party" shall mean any Person other than the parties to this Agreement and
their Affiliates.

"University Patents" shall mean issued patents and patent applications listed in
Exhibit B and future patents resulting from such applications as well as any and
all divisions, continuations, continuations-in-part, extensions including
Supplementary Protection Certificates and reissues of all such patents and
patent applications.


2             SCOPE OF THE AGREEMENT

2.1           Product Development Within the Field of Use
              -------------------------------------------

              ASTRA and TCS desire that ASTRA uses the technology, information
              and know-how (a) developed by the parties' cooperative effort,
              skilled personnel and facilities as of and prior to the Effective
              Date, or (b) contributed by the parties to the collaboration,
              including, but not limited to, the TCAR Technology, for the
              further development of Agents and Products suitable for commercial
              sale in the Field of Use, including, but not limited to:

              (a)  conducting research and development to identify and select 
                   Agents; and

              (b)  developing such selected Agents into Products; and

              (c)  developing Agents and Products for different indications 
                   for use; and


                                      5(28)





              (d)  selecting indications for use of Agents and Products 
                   consistent with market potential; and
              (e)  manufacturing, marketing and selling such Products.


3             TRANSFER OF RIGHTS

3.1           Assignment of Rights - TCAR Technology
              --------------------------------------

              TCS hereby transfers and assigns to ASTRA all of TCS' right, title
              and interest in and to the TCAR Technology subject to Sections 3.5
              and 3.6 herein. TCS further agrees to execute and deliver without
              delay at its own cost unless herein explicitly otherwise set forth
              all instruments and to perform all acts necessary to carry this
              transfer and assignment into full effect.


3.2           Delivery of Data and Materials included in TCAR Technology
              ----------------------------------------------------------

              As expeditiously as possible, and in no event later than May 31,
              1997, TCS shall deliver to ASTRA the complete existing materials,
              documents, reports, SOPs and reports of QA/QC prepared for the
              TCAR Project, information and data (whether in written, electronic
              or digital form) encompassing, describing or otherwise relating to
              TCAR Technology, including but not limited to items in Exhibit C.
              Items in Exhibit C that can not be found before May 31, 1997,
              shall be transferred to ASTRA free of charge excluding shipping
              costs if found at a later date. TCS may retain reserve samples of
              items in Exhibit C for use according to the Agreement. If TCS
              provides copies of any such materials, documents, information and
              data, TCS shall maintain the originals as well as the retained
              samples of items in Exhibit C free of charge excluding shipping
              costs to ASTRA in secure and proper storage, available to ASTRA
              under the Service Agreement as from time to time reasonably
              requested by ASTRA. If TCS decides not to maintain the original
              documents, information and data or the retained samples TCS shall
              offer to transfer them to ASTRA free of charge excluding shipping
              costs. TCS shall provide ASTRA as part of the transfer of TCAR
              Technology as defined in the First Amended and Restated Agreement
              originals or verified and accurate copies of laboratory notebooks
              containing information from all work carried out by TCS and copies
              of all reports of work carried out for TCS by contract
              laboratories or any other Third Party relating to such TCAR
              Technology. TCS shall have no obligation to complete or repeat any
              experiments or perform any new studies.


                                      6(28)





              Delivery of materials, data, documents and information under this
              section 3.2 shall be on a date mutually agreed upon by the
              parties. Such materials shall be provided to ASTRA or its
              designate representatives free of charge excluding shipping costs.
              TCS shall be responsible for packaging, storing and handling these
              materials under adequate and appropriate conditions prior to
              delivery. ASTRA shall be responsible for all shipping costs and
              risk of loss shall pass to ASTRA upon delivery to ASTRA or its
              designated carrier F.O.B. TCS's place of business located at 119
              Fourth Avenue, Needham, Massachusetts, 02194, U.S.A.

3.3           Summary Reports
              ---------------

              With regard to existing scientific data, results, records and
              relevant histories of studies TCS shall, to the extent not already
              done, prepare and deliver to ASTRA as expeditiously as possible,
              and in no event later than May 31, 1997, summary reports of the
              studies, experiments or activities which have generated
              information regarding the items listed in Attachment 1 to Exhibit
              C. The summary reports will only include information that
              currently exists and shall be sufficiently extensive in TCS's
              judgement to describe the rationale for these studies, the main
              results and conclusions, and references to where the raw data and
              other pertinent information can be found.


3.4           Reports prepared by ASTRA
              -------------------------

              If required, TCS will review ASTRA prepared reports, and will have
              them, or assist ASTRA in having them, signed by the appropriate
              personnel at TCS if the report is a proper and accurate
              representation of work completed by TCS personnel. The costs for
              this will be reimbursed by ASTRA in accordance with the Service
              Agreement.

3.5           TCS Licenses
              ------------

    a)        TCS hereby grants to ASTRA an Exclusive license under the TCAR
              Technology and TCS Patents and University Patents subject to the
              provisions of any license granted to TCS with respect to any
              applicable University Patent to research and develop, make, have
              made, use, sell and have sold products in all fields, subject to
              Section 3.6.

    b)        TCS shall at its own cost cooperate with and assist ASTRA in (i)
              assigning the TCS Licenses to ASTRA or (ii) instituting the 
              Institutes Standby Licenses or (iii) granting ASTRA a sub-license,
              all as


                                      7(28)





              requested by ASTRA in its sole discretion. If any Person who has
              granted a TCS License does not agree and consent to the assignment
              of the applicable TCS License to ASTRA, then TCS shall cooperate
              with and assist ASTRA in obtaining a direct license corresponding
              to the TCS License granted to TCS in the Field of Use. Upon the
              effective date of each Institutes Standby License or direct
              license secured by ASTRA, TCS' rights under the parallel TCS
              License shall cease and terminate except to the extent required
              for TCS to exercise its retained rights according to Article 3.6.
              Pending the assignment of the TCS Licenses, the Standby Licenses
              being instituted or ASTRA securing direct licenses, (i) TCS agrees
              not to terminate or surrender any TCS Licenses without ASTRA's
              prior consent, and (ii) to the extent permitted under each TCS
              License, TCS hereby grants to ASTRA an Exclusive sublicense under
              each of the TCS Licenses to research and develop, make, have made,
              use, sell and have sold Agents and Products in the Field of Use in
              the Territory.

              Regardless of the above, ASTRA may at its sole discretion and at
              any time terminate any TCS License for any or all parts of the
              Territory, subject to any provisions in any TCS License granted to
              ASTRA or TCS.

3.6           Retained Rights
              ---------------

              ASTRA hereby grants to TCS for the Term of this Agreement a
              royalty-free license, with a right to sublicense, in the TCAR
              Technology (to the extent permitted due to limitations in Third
              Party licenses granted to ASTRA) to make, have made, use, sell and
              have sold products in the field of diagnostic use. The license
              shall be Exclusive, save that ASTRA and its sublicensees shall
              always have non-exclusive royalty-free rights to use TCAR
              Technology to make, have made and use products for diagnostic
              purposes in connection with research and development of Agents and
              Products in the Field of Use. ASTRA further hereby grants to TCS a
              non-exclusive royalty-free license to make, have made and use TCAR
              Technology for the research and development of non-TCAR
              technologies, agents and products.

3.7           Non-Compete
              -----------

              TCS agrees that it prior to December 31, 2005, will not compete
              with ASTRA in the development of TCAR Technology in the Field of
              Use or in the development of Products and Agents, including that
              TCS shall not prior to December 31, 2005, conduct any research,
              development,


                                      8(28)





              manufacture, use or sales within the Field of Use of TCAR
              Technology or of any TCAR molecule, including a TCAR gene or a
              TCAR nucleic acid or an antibody, particularly a monoclonal
              antibody reacting against a TCAR, or any fragment, derivative,
              conjugate, analogue, salt or salt complex of either of the
              foregoing.


4             DEVELOPMENT IN GENERAL

4.1           General Standards
              -----------------

              During the Term hereof and subject to the terms of the Service
              Agreement attached as Exhibit E, TCS shall cooperate with ASTRA in
              good faith, particularly with respect to unknowns or
              contingencies, in order to achieve the objectives of this
              Agreement.

              The Service Agreement will continue to be valid after the
              Effective Date for ten years from the Effective Date.

4.2           ASTRA's Efforts
              ---------------

              ASTRA shall use reasonable diligence in employing its skilled
              personnel and facilities for the further development of TCAR
              Technology into at least one Product suitable for commercial sale
              in the Field of Use and to use reasonable diligence in exploiting
              the TCS Patent and University Patents. Upon developing a Product
              or Products, ASTRA shall use reasonable diligence to commercialize
              and market such Product or Products, subject to ASTRA's reasonable
              judgment and discretion in determining appropriate marketing
              plans, budgets and strategies. ASTRA's obligations under this
              provision are subject to ASTRA's right, in its sole discretion, to
              terminate development of any Agent or commercialization and
              marketing of any Product, if ASTRA determines that a commercially
              exploitable Product may not be developed or marketed, as the case
              may be, at reasonable cost and rate of return in light of market
              potential and market conditions.

4.3           Annual Reports
              --------------

              Until December 31, 2005, ASTRA agrees to provide TCS within sixty
              (60) days of the close of each calendar year with a summary report
              of the status of the development of Agents and Products,
              regulatory approval of all Agents and Products.



                                      9(28)







5             INTELLECTUAL PROPERTY RIGHTS

5.1           Ownership of Intellectual Property Rights
              -----------------------------------------

              As of the Effective Date, all rights to TCS TCAR Technology shall
              be the sole and exclusive property of ASTRA except those rights
              explicitly otherwise retained as set forth herein. Other
              technology which is proprietary to TCS and was used to enable the
              TCAR Technology shall remain TCS property and shall only be used
              by ASTRA for TM27 and TP12.

5.2           Filing, Prosecuting and Maintaining Patents
              -------------------------------------------

5.2.1          Subject to the provisions of the direct license or Stand-by
               License to ASTRA for the University patents, ASTRA shall, from
               and after the Effective Date, at its sole cost, prosecute,
               maintain and enforce all TCS Patents and University Patents
               listed in Exhibits A and B; provided, ---------------- however,
               that ASTRA shall not be responsible for reimbursing TCS for
               prorated costs incurred or paid by TCS prior to the Effective
               Date in connection with prosecuting, maintaining or enforcing the
               TCS Patents and University Patents.

              Regardless of the above, ASTRA may at its sole discretion and at
              any time abandon any TCS patent or University Patent in any or all
              parts of the Territory, provided however, that ASTRA shall notify
              TCS at least sixty (60) days prior to such abandonment, and ASTRA
              shall, in such notice, offer TCS the right to acquire, without
              charge, any such TCS Patent or University Patent, subject to the
              provisions of any license granted to ASTRA with respect to any
              applicable University Patent.

              5.2.2        TCS shall not oppose ASTRA prosecuting present and
                           future patents relating to TCAR and TCAR technology
                           using patent agents used by TCS in the prosecution of
                           the TCS Patents and the University Patents.

5.3           Enforcement of Patents
              ----------------------

5.3.1         The parties shall promptly advise each other upon becoming aware 
              of:

              a)   any activities which such party believes may be an 
                   infringement of any TCS Patent, University Patent or other 
                   proprietary right transferred under this Agreement related 
                   to the production, use or


                                     10(28)





                   sale of Agents or Products (collectively, "Proprietary 
                   Rights");

              b)   any attack on or appeal of the grant of any TCS Patent or
                   University Patent included in the Proprietary Rights;

              c)   any application made for letters patent by, or the grant of a
                   patent to, a Third Party in respect of rights which may claim
                   the same subject matter as or conflict with a TCS Patent or
                   University Patent included in the Proprietary Rights;

              d)   any application made for a compulsory license under any TCS
                   Patent or University Patent included in the Proprietary 
                   Rights.

     5.3.2     ASTRA shall have the initial right to take or cause to be taken
               whatever legal or other action is required to defend, maintain or
               enforce the TCS Patents and University Patents, to revoke or
               obtain a declaration of non- infringement under Third Party
               rights or to resist a compulsory license (the "Protective
               Action"). If ASTRA engages in such Protective Action, TCS shall
               cooperate fully with ASTRA in such action at ASTRA's expense. TCS
               may be represented by separate counsel of its own selection at
               its own expense in such Protective Action, but ASTRA shall have
               the right to control such action.

     5.3.3     If ASTRA fails to take any such Protective Action within three
               months of receipt from TCS of such notice, then (subject to the
               rights of Third Parties), TCS may, upon notice to ASTRA,
               institute its own Protective Action. In such event, TCS may bring
               such action in its name and/or that of ASTRA.

     5.3.4     All expenses incurred by either party in connection with any
               Protective Action shall be borne by such party. Any recovery
               actually received (or, where the rights which are the subject of
               the Protective Action have demonstrated utility outside the scope
               of this Agreement, that portion of the recovery actually received
               which is attributable to the practice of rights within the scope
               of this Agreement) as a result of such Protective Action, whether
               by judgement, award, decree or settlement, shall be applied:

              a)   first to repay to each party all of its expenses, fees and
                   costs (including without limitation all expenses, fees and
                   costs of expert witnesses, attorneys or other experts, court
                   costs, internal and external travel and living expenses for
                   all necessary parties, collectively the "Costs") incurred in
                   connection with the Protective Action; and


                                     11(28)







               b)   second to compensate the party which initiates or defends
                    the Protective Action, an amount equal to twice its Costs.

               c)   The balance of the recovery, if any, shall be deemed to
                    reflect ASTRA's Net Sales in the countries wherein the
                    Protective Action was successful. There shall be deducted
                    and paid to TCS from such balance an amount determined by
                    multiplying the portion of such balance allocable to each
                    country covered by the Protective Action by the applicable
                    Royalty Percentage as described in Section 8 payable to TCS
                    in such country. The remainder of the recovery, after such
                    payments have been made to TCS, shall be paid to ASTRA.

5.4           Confidentiality
              ---------------

5.4.1         Non-Disclosure Agreement
              ------------------------

              Each party recognizes that the TCAR Technology and other
              information received by it from the other party in the course of
              the collaboration constitute highly valuable, proprietary,
              confidential information (collectively the "Secret Information").
              Each party agrees that during the Term and for five (5) years
              thereafter it will keep confidential, and will cause its
              Affiliates, officers, employees, consultants and agents to keep
              confidential, all Secret Information received from the other party
              and disclose it only to those with a need to know. Neither party
              shall disclose, or permit any of its Affiliates, officers,
              employees, consultants and agents to disclose, Secret Information
              received from the other party to any other Person, nor use the
              same for any purpose, except as expressly permitted in this
              Agreement or in a separate written agreement with the other party
              regarding such disclosure or except as reasonably required for
              ASTRA research, development, registration, supply and
              commercialization of an Agent or Product in accordance herewith
              and except that TCS shall have the right to disclose such Secret
              Information to its licensee in the diagnostic field to conduct
              research and to make, use and sell products for diagnostic
              purposes subject to an undertaking of confidentiality by such
              licensee in accordance with the undertakings by TCS in this
              Agreement.


                                     12(28)





5.4.2         Information in Public Domain
              ----------------------------

               The restrictions contained in this Article 5.4 shall not apply to
               any Secret Information that (i) is, at the time of its disclosure
               to the receiving party, generally available to the public or
               otherwise part of the public domain, or as evidenced by written
               records of such party, is otherwise previously known to the
               receiving party, (ii) becomes generally available to the public
               or otherwise part of the public domain after its disclosure to
               the receiving party, through no act or omission of the receiving
               party or any other person owing an obligation of confidentiality
               to the receiving party hereto, or (iii) is required to be
               disclosed by any court or governmental agency having proper
               jurisdiction, provided that the other party is given prior notice
               of such disclosure to the extent reasonably practicable.

5.5           TCS non-disclosure of TCAR Technology
              -------------------------------------

              As of the Effective Date, TCS shall not disclose nor permit any of
              its Affiliates, officers, employees, consultants or agents to
              disclose to any Third Party any TCAR Technology, except that TCS
              shall have the right to disclose TCAR Technology to its
              licensee(s) in the diagnostic field to conduct research and to
              make, use and sell products for diagnostic purposes provided
              however, that such licensee(s) are subject to an agreement not to
              use TCAR Technology for purposes other than use in the diagnostic
              field and are subject to an agreement not to disclose TCAR
              Technology to any Third Party during the Term..


6             FUNDING

              As of the Effective Date, ASTRA shall have sole responsibility for
              all costs and expenses of any development program with respect to
              Agents or Products. TCS shall have no further financial
              responsibility with respect to such development programs,
              manufacturing, or marketing of Products, except as otherwise
              explicitly set forth in this Agreement and ASTRA shall have no
              obligation to reimburse TCS for any costs incurred on or before
              the Effective Date, nor shall ASTRA have an obligation to
              reimburse TCS for any costs on or after the Effective Date except
              as provided in the Service Agreement.

6.1           Costs For Acquiring Rights Under Third Party Patents
              ----------------------------------------------------

              As of the Effective Date, ASTRA shall be responsible for and bear
              all

                                     13(28)





               costs to Third Parties for acquiring necessary rights under Third
               Party patents including royalty and other payments for the
               licenses listed in Exhibit D hereto, provided however that ASTRA
               shall not be responsible for reimbursing TCS for prorated costs
               incurred or paid by TCS prior to the Effective Date.

6.2           Non-Defined Costs
              -----------------

              All costs incurred by either party not otherwise allocated in this
              Agreement or defined or provided for herein, or by separate
              agreement between the parties, shall be borne solely by the party
              incurring such cost.

6.3           Payment Schedule
              ----------------

              Other than royalties, as provided in Section 8 and payments, if
              any, under the Service Agreement, ASTRA shall be responsible to
              pay TCS a total of four million ($4.000.000) USD to be paid in
              installments upon the occurrence of the following events relating
              to Agents and Products developed by or on behalf of ASTRA and in
              the following amounts:



              Event                                                                                  Amount
              -----                                                                                  ------
                                                                                                    
6.3.1         Within five business days after the                                                    ***
              Execution of this Second Amended
              and Restated Product Development
              and Distribution Agreement

6.3.2         a)   Within thirty days after TCS has (i)                                              ***
                   signed and delivered to ASTRA all
                   documents appropriate for the change of
                   registered ownership of the TCS Patents
                   to ASTRA and (ii) delivered to ASTRA
                   all materials, documents, information and
                   data as provided in Paragraphs 3.2 and 3.3
                   and (iii) January 1, 1997, whichever is later.

              b)   Within thirty days within the milestone completion                                ***
                   in 6.3.2.(a) provided ASTRA is satisfied of such
                   completion.

6.3.3         Within thirty days after (i) approval of                                               ***


                                     14(28)





              the first IND in any country for the first Protected Agent or 
              (ii) within thirty days after injection of the first patient 
              with clinical grade material of the first Protected Agent,
              whichever occurs first.


6.3.4         Within thirty days after (i) approval of                                               ***
              the first IND in any country for the
              second Protected Agent (i.e a Protected Agent other than the first
              Protected Agent) or (ii) within thirty days after injection of the
              first patient with clinical grade material of the second Protected
              Agent, whichever occurs first.

6.3.5         Within thirty days after submission of                                                 ***
              the first NDA in any country for the
              first Protected Agent.

6.3.6         Within thirty days after submission of                                                 ***
              the first NDA in any country for the
              second Protected Agent (i.e a Protected Agent other than the first
              Protected Agent).

6.3.7         Within thirty days after approval of                                                   ***
              the first NDA in any country of the
              world for the first Product

6.3.8         Within thirty days after approval of                                                   ***
              the first NDA in any country of the
              world for the second Product (i.e a Product containing a Protected
              Agent other than the Protected Agent included in the first
              Product)



7             REGULATORY APPROVAL AND COMMERCIALIZATION OF
              PRODUCTS

7.1           Regulatory Approval of Products
              -------------------------------

7.1.1         ASTRA shall, at its sole cost, proceed reasonably diligently and
              in a commercially reasonable manner to compile, analyze and file
              in its own name (or its subdistributor's name) all applications
              for regulatory 


                                     15(28)





               approval (including all reports and submissions under any
               applicable PLA), consistent with any Product's market potential,
               as determined in ASTRA's sole discretion, ASTRA shall have
               complete control of the management and direction of clinical
               trials conducted by it necessary to obtain all regulatory
               approvals, including selection of clinical investigators, sites
               for trials and the monitoring of such clinical investigations.

7.2           Marketing and Distribution
              --------------------------

7.2.1         Subject to special provisions in this Section 7, ASTRA shall
              proceed reasonably diligently in a commercially reasonable manner
              upon issuance of all necessary regulatory approvals to market
              Products consistent with each Product's market potential in such
              markets as ASTRA deems appropriate.

7.2.2         ASTRA shall have Exclusive right to use, sell and market all
              Agents and Products for all indications in the Territory within
              the Field of Use.

7.2.3         In countries where ASTRA has Affiliates for marketing of
              pharmaceutical products, ASTRA shall market the Agents and
              Products solely through such Affiliates. In other countries, ASTRA
              shall market the Products through customary marketing channels.

7.2.4         The obligation on ASTRA under Paragraphs 7.2.1 and 7.2.3 will not
              be applicable on sales of Agents and Products containing Agents
              invented by Third Parties.


8             SCHEDULE OF ROYALTY PAYMENTS

8.1           Royalties during the Patent Period
              ----------------------------------

              With respect to sales of Product during the Patent Period ASTRA
              shall pay TCS a royalty on Net Sales of each Product (on a country
              by country and Product by Product basis), based on the following
              percentages:

              Market                                       Royalty Percentage
              ------                                       ------------------

              United States and Canada                                    ***
              Japan                                                       ***
              All other Countries                                         ***



                                     16(28)





               ASTRA shall be entitled to a credit against the royalty payments
               due to TCS in an amount equal to one-half the royalty payments
               paid under any Third Party license, including but not limited to
               the licenses listed on Exhibit D; provided, however, that in no
               event shall the royalty percentage due to TCS be reduced to less
               than 50% of the royalty percentage set forth above.

8.2           Royalties after the Patent Period
              ---------------------------------

              With respect to sales of Products after the Patent Period and for
              the remaining Term, ASTRA shall pay TCS a royalty (on a country by
              country and Product by Product basis) on Net Sales of each Product
              based on the following percentages:

              Market                                       Royalty Percentage
              ------                                       ------------------

              United States and Canada                                    ***

              Japan                                                       ***

              All other Countries                                         ***

              ASTRA shall be entitled to a credit against the royalty payments
              due to TCS in an amount equal to one-half the royalty payments
              paid under any Third Party license, including but not limited to
              the licenses listed on Exhibit D; provided, however, that in no
              event shall the royalty percentage due to TCS be reduced to less
              than 50% of the royalty percentage set forth above.

8.3           Combination Products
              --------------------

              In the event that a product is sold in a combination dosage form
              (e.g., in a single vial) together with a pharmaceutical Product
              which is not a Product or in a package or kit comprising separate
              dosage forms (e.g., vials) containing other active products, such
              as one or more active products manufactured by ASTRA, the royalty
              shall be calculated by subtracting from the Net Sales of the
              Combination ASTRA's manufacturing cost of the other active
              products (including any royalty costs which under the relevant
              royalty agreement are based upon net sales by ASTRA of the
              Combination) and then multiplying the remainder by the royalty
              percentage of the Products set forth in paragraph 8.1 or 8.2, as
              applicable, and then multiplying the result by a factor determined
              as the ratio of (A/A+B), where A is the documented 


                                     17(28)



              development costs of the Product(s) and B is the documented
              allocable development costs of all other products included in the
              Combination.


8.4           If a pharmaceutical formulation contains several Products covered
              by one or more TCS Patents and/or University Patents or if a
              pharmaceutical formulation contains only one Product but is
              covered by several TCS Patents and/or University Patents, ASTRA
              shall pay royalty to TCS only as if such formulation contains one
              Product and is covered by one TCS Patent or one University Patent.

8.5           As from and including the calendar month of first sales of Product
              in any country of the Territory, ASTRA shall provide TCS with
              quarterly accounts containing the Net Sales of the Product in each
              country of the Territory within 45 days after the end of each
              calender quarter. At the same time, ASTRA shall pay to TCS the
              royalty as stipulated above. Payment shall be made in the currency
              of United States Dollars (USD) to a bank account designated by
              TCS.

 8.6           If ASTRA sells the Product in any other currency than USD,
               then such payments shall for the purpose of calculating Net Sales
               be converted to USD using the rate of exchange prevailing at a
               first class foreign exchange bank in Sweden on the last working
               day in the calendar quarter in question.

8.7           ASTRA shall keep accurate records of its Net Sales of the
              Products. In order to permit verification of Net Sales of the
              Product under this Agreement, such records shall be open to
              inspection at any reasonable time within two (2) years after the
              royalty period to which such records relate, by an independent
              certified public accountant selected by and paid by TCS to whom
              ASTRA shall have no reasonable objection.


9             TERM, EXPIRATION AND TERMINATION

9.1           Term and expiration
              -------------------

              This Agreement shall be for a term (the "Term") commencing on the
              "Effective Date" and expiring on December 31, 2027 unless sooner
              terminated in accordance with any provision of this Agreement.

              Upon expiration of the Term, ASTRA's obligation to pay TCS the
              royalty on Net Sales of any Product shall expire and the license
              granted by TCS to ASTRA in Paragraph 3.5 shall be converted to a
              fully paid 

                                     18(28)



              up, perpetual, royalty-free, non-exclusive license.


9.2           ASTRA - Voluntary Termination
              -----------------------------

              ASTRA may at any time, in ASTRA's sole discretion, upon written
              notice to TCS, terminate this Agreement, in which event ASTRA
              shall offer to transfer to TCS at its own costs the TCAR
              Technology and the TCS Licenses (subject to any approval necessary
              from any Third Party) and ASTRA shall not be obligated to make any
              payments under this Agreement not due and payable to TCS prior to
              the date of the written notice.

9.3           Breach of the Agreement
              -----------------------

              Paragraphs 12 and 17.2 of the First Amended and Restated Product
              Development and Distribution Agreement shall be applicable on any
              Event of Termination or non-performance as defined in that
              Agreement until the transfer of rights as provided in Paragraph 3
              has been completed and the payment according to Section 6.3.2 has
              been made. After the transfer of rights as provided in Paragraph 3
              in this Second Amended and Restated Product Development and
              Distribution Agreement has been completed, each party's remedy for
              any breach of any obligation or warranty under this Agreement
              shall be limited to money damages, to be determined in arbitration
              as provided in paragraph 13.2.

9.4           Existing Obligations
              --------------------

              No termination of this Agreement shall affect any obligation of
              any party which arose prior to the effective date of such
              termination with respect to monies owed or as to Secret
              Information. The right of any party to terminate this Agreement,
              as hereinabove provided, shall not be affected in any way by its
              waiver of, or failure to, take action with respect to any previous
              Event of Termination.


10            REPRESENTATIONS AND WARRANTIES

10.1          General Representations
              -----------------------

              Each party hereby represents and warrants for itself as follows:

10.1.1        Duly Organized
              --------------




                                     19(28)





              It is a corporation duly organized, validly existing and in good
              standing under the laws of the jurisdiction of its incorporation,
              is qualified to do business and is in good standing as a foreign
              corporation in each jurisdiction in which the conduct of its
              business or the ownership of its properties requires such
              qualification and has all requisite power and authority,
              corporate or otherwise, to conduct its business as now being
              conducted, to own, lease and operate its properties and to
              execute, deliver and perform this Agreement.

10.1.2        Due Execution
              -------------

              The execution, delivery and performance by it of this Agreement
              have been duly authorized by all necessary corporate action and do
              not and will not (i) require any consent or approval of its
              stockholders, (ii) violate any provision of any law, rule,
              regulation, order, writ, judgment, injunction, decree,
              determination or award presently in effect having applicability to
              it or any provision of its charter or by-laws or (iii) result in a
              breach of or constitute a default under any material agreement,
              mortgage, lease, license, permit or other instrument or obligation
              to which it is a party or by which it or its properties may be
              bound or affected.

10.1.3        No Government Approval
              ----------------------

              No authorization, consent, approval, license, exemption of, or
              filing or registration with, any court or governmental authority
              or regulatory body is required for the due execution, delivery or
              performance by it of this Agreement, except as provided herein.

10.1.4        Binding Agreement
              -----------------

              This Agreement is a legal, valid and binding obligation of such
              party, enforceable against it in accordance with its terms and
              conditions. It is not under any obligation to any Person,
              contractual or otherwise, that is conflicting or inconsistent in
              any respect with the terms of this Agreement or that would impede
              the diligent and complete fulfilment of its obligations hereunder.

10.1.5        Governmental Status
              -------------------

              It is not debarred or suspended from receiving contracts from the
              U.S. or Swedish government or other governmental authority or
              agency.


                                     20(28)





10.1.6        Full Disclosure
              ---------------

              Each party has disclosed to the other in good faith any and all
              material information relevant to the subject matter of this
              Agreement and to such party's ability to observe and perform its
              obligations hereunder.

10.2          TCS warrants that the T Cell Antigen Receptor Monoclonal Antibody
              License Agreement of February 6, 1990 between Dr. Arthur Boylston
              and T Cell Sciences, Inc does not cover ATM-027/TM27 and that
              therefore Boylston will not be entitled to any royalty on Net 
              Sales of Product containing this Agent.


11            EXPORT CONTROL

11.1          Technical Data and Commodities
              ------------------------------

              The parties hereby agree that any "Technical Data" (as that term
              is defined in section 779.1 of the U.S. Export Administration
              Regulations) exported from the United States pursuant to this
              Agreement and any other related agreements, and any direct product
              thereof, shall not be shipped, either directly or indirectly, to
              the People's Republic of China or Afghanistan or any Group Q, S,
              W, Y or Z countries (as specified in Supplement No. 1 to part 770
              of the Export Administration Regulations), unless (i) separate
              specific authorization to re-export such Technical Data or such
              direct products is provided by the U.S. Office of Export
              Administration or (ii) such specific authorization is not required
              pursuant to Section 779.8 of the U.S. Export Administration
              Regulations. The parties further agree that the export and
              re-export of commodities pursuant to this Agreement and any other
              related agreements shall be subject to the licensing requirements
              of the U.S.
              Export Regulations.

11.2          Laws of Other Countries
              -----------------------

              In the event that a specific authorization of, or a validated
              license from, a government other than that of the exporting party
              is required, the party within the jurisdiction of such other
              government shall, upon the request of the party proposing to make
              the export, use reasonable efforts to obtain as expeditiously as
              practicable, the requisite authorization or license.



                                     21(28)





12            INDEMNIFICATION

12.1          Indemnification
              ---------------

              For purposes of this Section 12 "Indemnified Parties" refers to
              TCS, its Affiliates and the officers, directors, employees, agents
              and grantors under Third Party licenses of TCS and its Affiliates
              when ASTRA is the indemnitor, and "Indemnified Parties" refers to
              ASTRA its Affiliates and the officers, directors, employees,
              agents and grantors under Third Party licenses of ASTRA and its
              Affiliates when TCS is the indemnitor.

12.1.1        TCS, as indemnitor on behalf of itself and its officers,
              directors, employees, agents and representatives (including all
              contractors for which TCS is responsible undertaking work in any
              Program) shall indemnify and hold harmless the ASTRA Indemnified
              Parties and each of them from any and all liability arising out of
              any suit, action, legal proceeding, claim or demand of whatever
              kind or character based upon

              (a)  a claim or occurrence arising from any acts, whether of
                   omission or commission, by said officers, directors,
                   employees, agents or representatives prior to the Effective
                   Date; or

              (b)  any breach of any representation, warranty or agreement made
                   by TCS hereunder; or

              (c)  the failure by TCS in performing its obligations under this
                   Agreement.

12.1.2        ASTRA, as indemnitor on behalf of itself and its officers,
              directors, employees, agents and representatives (including all
              contractors for which ASTRA is responsible undertaking work in any
              Program) shall indemnify and hold harmless the TCS Indemnified
              Parties and each of them from any and all liability arising out of
              any suit, action, legal proceeding, claim or demand of whatever
              kind or character based upon

              (a)  a claim or occurrence arising from any acts, whether of
                   omission or commission, by said officers, directors,
                   employees, agents or representatives in connection with the
                   obligations undertaken by ASTRA or in connection with the
                   manufacture, use or sale of any Agent or Product prior to or
                   after the Effective Date by ASTRA; or

              (b)  any breach of any representation, warranty or agreement made 
                   by



                                     22(28)



                   ASTRA hereunder; or


              (C)  the failure by ASTRA in performing its obligations under this
                   Agreement.

12.1.3        Anything to the contrary in this Paragraph 12 notwithstanding,
              neither party shall be obligated to indemnify an Indemnified Party
              for such Indemnified Party's own acts of negligence or wilful
              misconduct or for any violation of any warranty, representation or
              agreement made by such Indemnified Party hereunder.

12.2          Scope of Indemnification
              ------------------------

12.2.1        The agreement to indemnify and hold harmless from liability set
              forth herein shall include, without limitation, all damages of
              every kind, reasonable attorney fees, all costs and expenses which
              may be levied against and out of pocket costs incurred by the
              Indemnified Parties in connection with any suit, action, legal
              proceeding, claim or demand.

12.2.2        Each party acknowledges and hereby agrees that the obligations set
              forth in this Paragraph 12 shall survive the termination or
              expiration of this Agreement until the expiration of any
              applicable statute of limitations.

12.2.3        The Indemnified Parties will cooperate with the indemnitor at the
              indemnitor's expense in the defence of any suit. Neither party
              shall be liable for any costs resulting from any settlement made
              without its consent.


13            MISCELLANEOUS

13.1          Notices
              -------

              All notices or other written communications hereunder shall be
              given in English and sent via certified mail, return receipt
              requested, or commercial courier or shall be given by facsimile
              transmission, confirmed by letter sent as provided above, or by
              personal delivery, addressed as follows, or to such other address
              as may be designated from time to time by notice given in the
              manner provided in this Paragraph 13.1.



                                     23(28)





              If to ASTRA:
              To ASTRA at its address as set forth at the beginning of this 
              Agreement
              Attention: Legal Affairs
              Fax No,: 011-46-8-553-28812
              If to TCS:
              To TCS at its address as set forth at the beginning of this 
              Agreement
              Attention: President
              Fax No.: 01-01-617-433-0262

              Notices given personally shall be deemed delivered as of the date
              delivered. All other notices shall be deemed delivered as of the
              date of receipt for the notice by a messenger service, or on the
              date of the first attempted delivery of the mailed notice, as
              shown on the postal service return receipt, or by facsimile
              transmission which produces a dated message of completed
              confirmation. Notwithstanding any other provision of this
              Paragraph 13 to the contrary, any notice shall be effective from
              and after the date actually received by an addressee, however
              addressed or delivered.

13.2          Governing Law; Arbitration
              --------------------------

              This Agreement is made and delivered in Boston, Massachusetts, USA
              and shall be governed by and construed in accordance with the laws
              of the Commonwealth of Massachusetts applicable to agreements made
              and to be performed entirely within the Commonwealth of
              Massachusetts. In the event of any dispute under this Agreement,
              whether as to validity, construction, enforceability or
              performance of this Agreement or any of its provisions or
              otherwise, both parties shall endeavour to settle such dispute
              amicably between themselves. In the event that the parties fail to
              agree, such dispute shall be settled by arbitration as follows.
              Either party may by notice in writing to the other require any
              issue in dispute to be submitted to arbitration in accordance with
              this Paragraph 13.2. Such notice shall contain a statement of the
              arbitrable issue forming the basis of the dispute and the position
              of the moving party as to the proper resolution of that issue.
              Within 30 days after receipt of such notice, the responding party
              shall submit to the moving party a statement of its conception of
              the arbitrable issue in question and of its position as to the
              proper resolution of that issue. Within 45 days of the responding
              party's response, each party shall appoint an arbitrator and give
              the other party written notice thereof. In the event a party shall
              fail to appoint an arbitrator and provide written notice thereof
              to the other party within such 45 day period, an arbitrator shall
              be appointed for such party by the American Arbitration


                                     24(28)





              Association as promptly as practicable after request by the other
              party. Thereafter, the two appointed arbitrators shall select a
              third arbitrator within 30 days after receipt of a list of
              arbitrators proposed by the American Arbitration Association. If
              the two arbitrators designated by the parties are unable to agree
              on the third arbitrator within 30 days, then either party with
              notice to the other party, may call for such appointment by the
              American Arbitration Association of the third arbitrator. Each
              arbitrator shall agree prior to his or her appointment to hear the
              dispute promptly and render a decision as soon as practicable
              thereafter. Said arbitration shall be conducted in English in
              Boston, Massachusetts, in accordance with the commercial
              arbitration rules or successor rules then obtaining of the
              American Arbitration Association to the extent not inconsistent
              with this Paragraph 13.2. The agreement of 2 of the 3 arbitrators
              shall be sufficient to render a decision. The decision of the
              panel shall be final and binding upon the parties and enforcement
              thereof may be obtained in any court of competent jurisdiction.
              The unsuccessful party to such arbitration shall pay to the
              successful party all costs and expenses, including reasonable
              attorney's fees incurred therein by such successful party.

13.3          Binding Effect
              --------------

              This Agreement, and the rights and duties of the parties herein
              contained, shall be binding upon, and shall inure to the benefit
              of, the parties hereto and their respective legal representatives,
              successors and permitted assigns.

13.4          Entire Agreement
              ----------------

              This Agreement sets forth the entire agreement and understanding
              of the parties with respect to the matters covered herein and as
              of the Effective Date supersedes all prior agreements,
              arrangements and understandings between them with respect to said
              matters, including the First Amended and Restated Product
              Development and Distribution Agreement dated as of December 10,
              1993 and the TCAR Division Amendment and all rights and
              obligations of either party therein.

13.5          Counterparts
              ------------

              This Agreement may be executed simultaneously in two or more
              counterparts, each of which shall be deemed an original, but all
              of which together shall constitute one and the same instrument.



                                     25(28)





13.6          Headings
              --------

              Headings are inserted herein for convenience of reference only and
              do not form a part of this Agreement, and shall be given no effect
              or meaning in the construction or interpretation of this
              Agreement.

13.7          Amendment; Waiver
              -----------------

              This Agreement may be amended, modified, superseded or cancelled,
              and any of the terms hereof may be waived, only by a written
              instrument executed by each party hereto or, in the case of
              waiver, by the party or parties waiving compliance. The delay or
              failure of any party at any time or times to require performance
              of any provision hereof shall in no manner affect the rights of
              such party at a later time to require any performance. No waiver
              by any party of any condition or of the breach of any term
              contained in this Agreement, whether by conduct or otherwise, in
              any one or more instances, shall be deemed to be or construed as a
              further or continuing waiver of any such breach or the breach of
              any other term of this Agreement.

13.8          No Third Party Beneficiaries
              ----------------------------

              Except as otherwise specifically set forth in Paragraph 12
              (Indemnification) hereof, no Person not a party to this Agreement,
              including any employee of any party to this Agreement, shall have
              or acquire any rights by reason of this Agreement, nor shall any
              party hereto have any obligations or liabilities to such other
              Person by reason of this Agreement. Nothing contained in this
              Agreement shall be deemed to constitute the parties partners with
              each other or any Person.

13.9          No Joint Venture
              ----------------

              The relationship of the parties hereto is that of independent
              contractors. Nothing in this Agreement shall be construed to
              constitute, create, give effect or otherwise imply a joint
              venture, agency, partnership or other formal business organization
              or any employer/employee relationship of any kind between the
              parties.

13.10         Force Majeure
              -------------

              If either party shall be delayed, interrupted in or prevented from
              the performance of any obligation hereunder (other than the
              payment of money due) by reason of the occurrence of an event
              beyond the control


                                     26(28)





              of such party including fire, flood, other nature disasters, war
              (declared or undeclared), public disaster, strike or labour
              differences, governmental enactment, rule or regulation, or any
              other cause beyond such party's control, such party shall not be
              liable to the other therefor; and the time for performance of such
              obligation shall be extended for a period equal to the duration of
              the contingency which occasioned the delay, interruption or
              prevention. The party invoking such Force Majeure rights of this
              Paragraph 13.10 must notify the other party within a period of
              fifteen (15) days following the first and the last day of the
              Force Majeure unless the Force Majeure renders such notification
              impossible, in which case notification will be made as soon as
              possible.

13.11         English Language
              ----------------

              This Agreement has been executed in the English language, the
              official language of the Agreement shall be English, and any
              interpretation or construction of this Agreement shall be based
              solely on the English language official text. All notices,
              documents and information to be delivered in connection with or
              pursuant to the Agreement shall be in English.

13.12         Publicity
              ---------

              The parties will agree with each other in advance of the public
              release of information with respect to the transactions
              contemplated herein, except that either party may release
              information to the public regarding such transactions to allow
              such party to meet its legal obligations.

13.13         Exhibits
              --------

              All exhibits attached hereto are made a part of this Agreement and
              the terms thereof are incorporated into this Agreement by
              reference.

13.14         Drafts
              ------

              This Agreement shall not be binding or effective until properly
              executed and delivered by both TCS and ASTRA.

13.15         Interest
              --------

              Interest shall accrue on any delinquent amounts owed by ASTRA
              hereunder at ten percent (10%) per annum.



                                     27(28)




13.16         No Assignment
              -------------

              This Agreement shall not be assignable without the prior written
              approval of the other party except that (i) either TCS or ASTRA
              may assign this Agreement to an Affiliate and (ii) TCS may assign
              this Agreement to an assignee of all of its good will, business
              and assets; provided however, that in case of any assignment
              permitted by this Paragraph 13.16 and notwithstanding any such
              assignment, the assigning party shall remain fully liable for all
              of its obligations under this Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be amended
and restated by their duly authorized representatives as of the 1st day of May,
1996.


ASTRA AB
 (publ)
By:
   ----------------------------
   Hakan Mogren, President and
   Chief Executive Officer
   hereunto duly authorized


T CELL SCIENCES, INC.

By:
   ---------------------------
   Una S Ryan, President and
   Chief Executive Officer
   hereunto duly authorized



                                     28(28)