NEURON LOSS PROTECTION TECHNOLOGY
                                  LICENSE AGREEMENT


    Effective as of the 13th day of April, 1993 (the "Effective Date") 
between the University of Kentucky Research Foundation, a corporation duly 
organized and existing under the laws of the Commonwealth of Kentucky, and 
having its principal place of business at 207 Administration Building, 
Lexington, Kentucky, 40506 ("UKRF") and Apollo Genetics, Inc., a corporation 
duly organized and existing under the laws of the State of Delaware, and 
having its principal place of business at 222 Third Street, Suite 3121, 
Cambridge, Massachusetts 02142 ("Licensee"), hereby agree as follows: 

    1.  BASIS OF AGREEMENT.  UKRF is the owner of Neuron Loss Protection 
Technology as later defined herein and desires to have such technology 
utilized to promote the public interest by granting a license thereunder.  
Licensee has a commitment to facilitate the development of such technology 
for the public interest.  It is the desire and interest of the parties that 
Licensee obtain a license from UKRF to utilize such technology.  The purpose 
of this Agreement is to set forth the terms and conditions under which UKRF 
will grant and Licensee will accept said license. 

    2.  DEFINITIONS. 

    2.1.  "NEURON LOSS PROTECTION TECHNOLOGY" shall mean [*]

    2.2.  "PATENT RIGHTS" shall mean any United States or foreign patent 
applications or any patents issuing thereon directed to the invention or 
inventions set forth in University of Kentucky I.P.C. Case [*]
owned by, or assignable to, UKRF, together with any division, 
reissue, continuation, continuation in part, extension, or addition thereof. 

    2.3.  "LICENSED PRODUCT" shall mean any product which is covered in whole 
or in part by (i) a pending claim contained in a Patent Rights application in 
the country in which the Licensed Product is made, used, or sold, or (ii) a 
valid and unexpired claim contained in a Patent Rights patent in the country 
in which the Licensed Product is made, used or sold. A valid claim is any

* Confidential treatment has been requested for marked portion



claim that has not been held invalid or unenforceable by a court of competent 
jurisdiction. 

    2.4.  "LICENSED PROCESS" shall mean any process which is covered in whole 
or in part by (i) a pending claim contained in a Patent Rights application in 
the country in which the Licensed Process is, used, or sold, or (ii) a valid 
and unexpired claim contained in a Patent Rights patent in the country in 
which the Licensed Process is used or sold.  A valid claim is any claim that 
has not been held invalid or unenforceable by a court of competent 
jurisdiction. 

    2.5.  "NET SALES" shall mean the gross amount invoiced by Licensee and 
its Affiliates from the sales of Licensed Products or Licensed Processes to 
independent third parties less: 

    [ * ]

Licensed Products and Licensed Processes shall be considered "sold" when 
invoiced. 

    2.6.  "SUBLICENSE INCOME" shall mean the net royalties (including 
advanced royalties or "lump-sum" payments) actually received by Licensee from 
non-affiliated third party sublicensees under the license herein granted, 
after the deduction of all reasonable legal costs actually incurred by 
Licensee in connection with the negotiation and procurement of the pertinent 
sublicenses. 

    2.7.  "AFFILIATE" shall mean any corporation or other business entity 
controlled by, controlling, or under common control with Licensee.  For this 
purpose "control" means direct or indirect beneficial ownership of at least 
fifty percent (50%) interest in the income or stock of such corporation or 
other business. 

    3.  GRANT. 

    3.1.  UKRF hereby grants to Licensee, subject to all the terms and 
conditions of this Agreement, the exclusive right and license to make, have 
made, use, lease and sell the Licensed Products throughout the world. 

* Confidential treatment has been requested for marked portion


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    3.2.  Licensee shall have the right to sublicense worldwide any of the 
rights, privileges and licenses granted hereunder. 

    4.  DUE DILIGENCE. 

    4.1.  Licensee agrees to work diligently to bring one or more Licensed 
Products or Licensed Processes to the marketplace through a program of 
development, production and distribution, including sponsoring of research at 
UKRF pursuant to the Sponsored Research Agreement between UKRF and Licensee, 
providing UKRF with a minimum of $[ * ] per year for [ * ], in 
substantially the form of Exhibit 1 attached hereto. 

    4.2.  Licensee shall provide an annual report on its development efforts 
to UKRF, which report shall cite specific goals and objectives in 
commercializing the licensed technology and progress in meeting these goals 
and objectives. 

    5.  ROYALTIES. 

    5.1.  In consideration of the license granted hereunder by UKRF to 
Licensee, Licensee shall pay an earned royalty of [ * ] percent ([ * ]%) of 
Net Sales of Licensed Products and Licensed Processes by Licensee and its 
sublicensed Affiliates. 

    5.2.  In the event Licensee grants any sublicenses to nonaffiliated third 
parties during the term of this Agreement, then for each such sublicense, 
Licensee shall pay UKRF an additional royalty at the rate of [ * ]
percent ([ * ]%) of the Sublicense Income collected by Licensee under such 
sublicense. 

    6.  REPORTS, RECORDS AND ROYALTY PAYMENTS. 

    6.1.  RECORDS.  Licensee shall keep adequate and complete records showing 
all Licensed Products and Licensed Processes sold and Net Royalties received, 
with respect to which earned royalties and additional royalties are due under 
this Agreement.  Such records shall include all information necessary to 
verify the total amount and computation of earned royalties and additional 
royalties due hereunder, and shall be open to inspection on behalf of UKRF 
upon reasonable notice during reasonable business hours to the extent 
necessary to verify the amount thereof.  Such inspection shall be made not 
more often than once each calendar year at the expense of UKRF by a Certified 
Public Account appointed by UKRF and to whom Licensee has no reasonable 
objection.  Licensee shall not be required to retain such records for more 
than five (5) years after the close of any calendar half year.

    6.2.  REPORTS.  The last day of each February and November throughout the 
term of this Agreement and upon a final accounting, Licensee shall furnish 
UKRF with a written report, signed by an authorized representative of 
Licensee, showing (a)

* Confidential treatment has been requested for marked portion


                                      3



the total Net Sales of all Licensed Products and the total Net Sales of all 
Licensed Processes sold by Licensee and its sublicensed Affiliates in each 
country during the preceding calendar half-year; (b) the total amount of 
Sublicense Income received by Licensee and its Affiliates from non-affiliated 
sublicensees under this license during the preceding calendar half year; (c) 
the amount of royalties due on Licensed Products and Licensed Processes sold 
by Licensee and its sublicensed Affiliates during the preceding calendar half 
year, computed pursuant to the provisions of Section 5.1 hereof; and (d) the 
amount of UKRF's pro data share of such Sublicense Income received by 
Licensee and its Affiliates during the preceding calendar half year, computed 
pursuant to the provisions of Section 5.2 hereof. 

    6.3.  ROYALTY PAYMENTS.  With each such half-yearly report, Licensee 
shall remit to UKRF the total amount of royalties shown thereby to be due, 
subject to any credits which may be taken by Licensee hereunder.  Subject to 
the provisions of Section 6.4 hereof, payment shall be made in lawful money 
of the United States.

    6.4.  CURRENCY CONVERSION.  All payments due hereunder from foreign sales 
of Licensed Products and Licensed Processes from time to time shall be paid 
in United States funds collectible at par in Boston, Massachusetts.  For 
purposes of computing such payments, the Net Sales shall first be determined 
in the foreign funds for which such Licensed Products or Licensed Processes 
are sold (herein called "selling funds") and then converted into its 
equivalent in United States funds at either: 

    (a) the rate applicable to the transfer of funds arising from royalty 
payments as established by the exchange control authorities of the country of 
which selling funds are the national currency, for the last business day of 
the accounting period for which payment is thus made; or

    (b) if there is no applicable rate so established, then the selling rate 
in United States funds as published by leading commercial banks in the major 
city of the country of which selling funds are the national currency, for the 
last business day of such accounting period; or 

    (c) if there is no rate so published, then the buying rate for selling 
funds as published by First National Bank of Boston, N.A., for the last 
business day of such accounting period. 

    7.  PATENT PROSECUTION AND INFRINGEMENT. 

    7.1.  Licensee shall, in the name of UKRF, apply for, seek prompt 
issuance of, and maintain during the term of this Agreement any Patent Rights 
in the United States and in foreign countries.  The prosecution, filing and 
maintenance of all patents shall be the primary responsibility of Licensee, 
who

                                      4



shall consult with UKRF concerning the foregoing and provide copies of 
pertinent filings to UKRF. 

    7.2.  Payment of all fees and costs relating to the filing, prosecution 
and maintenance of all patents shall be the responsibility of Licensee. 

    7.3.1.  If at any time during the term of this Agreement, Licensee 
furnishes to UKRF reasonably convincing written evidence of an infringement 
of a patent included in the Patent Rights which adversely and substantially 
affects the commercial operations of Licensee under the license granted 
hereunder,and UKRF shall within three (3) months after receipt of such 
evidence fail to cause such infringement to terminate or to bring a suit or 
action to compel termination, then payment of royalties under Section 5 
hereof shall be waived so long as such infringement continues; provided, 
however, that such royalties shall not be so waived so long as at least one 
suit or action is being prosecuted by UKRF for infringement of such patent. 

    7.3.2.  If after said three (3) months, UKRF fails to cause such 
infringement to terminate or to bring a suit or action to compel termination, 
Licensee shall have the right, but not the obligation, to bring such suit or 
action to compel termination and shall have the right for such purpose to 
join UKRF as a party plaintiff at Licensee's expense.  UKRF independently 
shall have the right to join any such suit or action brought by Licensee and, 
in such event, shall pay one-half of the cost of such suit or action from the 
date of joining.  No settlement, consent judgment or other voluntary final 
disposition of the suit may be  entered into without the consent of UKRF, 
which consent shall not unreasonably be withheld.  Any damages recovered by 
such suit or action shall be first used to reimburse each party hereto for 
the cost of such suit or action (including attorney's fees) actually paid by 
each party hereto as the case may be, then to reimburse UKRF for any 
royalties waived under this Section 7.3 and the residue, if any, shall be 
divided equally between the parties hereto. 

    7.4.  In the event that a declaratory judgment action alleging invalidity 
or noninfringement of any of the Patent Rights shall be brought against 
Licensee, UKRF, at its sole option, shall have the right, within thirty (30) 
days after commencement of such action, to intervene and take over the sole 
defense of the action at its own expense. 

    7.5.  In any infringement suit as either party may institute to enforce 
the Patent Rights pursuant to this Agreement, the other party hereto shall, 
at the request and expense of the party initiating such suit, cooperate in 
all respects and, to the extent possible, have its employees testify when 
requested and make available relevant records, papers, information, samples 
and the like.

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    8.  TERM AND TERMINATION. 

    8.1.  Unless earlier terminated as hereinafter provided, this Agreement 
shall remain in full force and effect until the last to expire of any patent 
included in the Licensed Products. 

    8.2.  If Licensee shall cease to carry on its business, this Agreement 
shall terminate upon notice by UKRF. 

    8.3.  Should Licensee fail to pay UKRF such royalties as are due and 
payable hereunder, UKRF shall have the right to terminate this Agreement on 
forty-five (45) days written notice, unless Licensee shall pay UKRF within 
the forty-five day (45) notice period, all such royalties and interest that 
are due and payable.  Upon the expiration of the forty-five (45) day period, 
if Licensee shall not have paid all such royalties and interest due and 
payable, UKRF, at its sole option, may immediately terminate this Agreement 
and all rights, privileges and license hereunder granted.

    8.4.  Licensee shall have the right to terminate this Agreement at any 
time upon six (6) months written notice to UKRF, and upon payment of all 
amounts due UKRF through the effective date of termination. 

    8.5.  Upon any material breach or default of this Agreement by Licensee, 
other than those delineated in Sections 8.2 and 8.3 which shall always take 
precedence in that order over any material breach or default referred to in 
this Section 8.5, UKRF shall have the right to terminate this Agreement and 
the rights, privileges and license hereunder granted upon ninety (90) days 
written notice to Licensee.  Such termination shall become effective 
immediately at the conclusion of such notice period unless Licensee shall 
have cured any such breach or default prior to the expiration of the ninety 
(90) day period. 

    8.6.  Upon termination of this Agreement for any reason, nothing herein 
shall be construed to release either party from any obligation that matured 
prior to the effective date of such termination.  Licensee and its 
sublicensed Affiliates and any non-affiliated third party sublicensees 
thereof may, after the effective date of such termination, sell all Licensed 
Products which are in inventory at the time of termination and Licensed 
Processes for which inventory was received at the time of termination, and 
complete and sell Licensed Products which Licensee can clearly demonstrate 
were in the process of manufacture at the time of such termination, provided 
that Licensee shall pay to UKRF the royalties thereon as required by Section 
5 of this Agreement and shall submit the reports required by Section 5 hereof 
on the sales of Licensed Products and Licensed Processes. 

    9.  INDEMNIFICATION AND INSURANCE.

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    9.1.  Licensee shall indemnify, defend and hold harmless UKRF  and its 
trustees, officers, employees, and affiliates (the "Indemnitees"), against 
any liability, damage, loss or expense (including reasonable attorneys' fees 
and expenses of litigation) incurred by or imposed upon the Indemnitees, or 
any one of them, in connection with any claims, suits, actions, demands or 
judgments (a) arising out of the production, manufacture, sale, use in 
commerce, or promotion by Licensee or by a licensee, affiliate or agent of 
Licensee, or any product, process or service relating to, or developed 
pursuant to, this Agreement or (b) arising out of any other activities to be 
carried out pursuant to this Agreement.

    9.2.  Licensee's indemnification under Section 9.1(a) shall apply to any 
liability, damage, loss or expense whether or not it is attributable to the 
negligent activities of the Indemnitees.  Licensee's indemnification under 
Section 9.1(b) shall not apply to any liability, damage, loss or expense to 
the extent that it is attributable to (i) the negligent activities of the 
Indemnitees, or (ii) the intentional wrongdoing or intentional misconduct of 
the Indemnitees.

    9.3.  At such time as any product, process or service relating to, or 
developed pursuant to, this Agreement is being commercially distributed or 
sold (other than for the purpose of obtaining regulatory approvals) by 
Licensee or by a licensee, affiliate or agent of Licensee, Licensee shall, at 
its sole cost and expense, procure and maintain policies of comprehensive 
general liability insurance in amounts not less than One Million Dollars per 
person per occurrence and naming the Indemnitees as additional insureds.  
Such comprehensive general liability insurance shall provide (a) product 
liability coverage; (b) broad form contractual liability coverage for 
Licensee's indemnification under Sections 9.1 and 9.2 of this Agreement; and, 
(c) a provision of non-cancellation except upon sixty (60) days written 
notification to UKRF.

    9.4.  In the event any such action is commenced or claim made  or 
threatened against UKRF or other Indemnitees as to which Licensee is 
obligated to indemnify it (them) or hold it (them) harmless, UKRF or the 
other Indemnitees shall promptly notify Licensee of such event and Licensee 
shall assume the defense of, and may settle, that part of any such claim or 
action commenced or made against UKRF (or other Indemnitees) which relates to 
Licensee's indemnification and Licensee may take such other steps as may he 
necessary to protect itself.  Licensee shall not be liable to UKRF or other 
Indemnitees on account of any settlement of any such claim or litigation 
affected without Licensee's consent.  The right of Licensee to assume the 
defense of any action shall be limited to that part of the action commenced 
against UKRF and/or Indemnitees which relates to Licensee's obligations of 
indemnification and holding harmless.

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    9.5.  This Section 9 shall survive expiration or termination of this 
Agreement. 

    10.  DISCLAIMER OF WARRANTIES. 

    10.1.  UKRF MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, WITHOUT 
LIMITATION, ANY IMPLED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A 
PARTICULAR PURPOSE WITH RESPECT TO ANY TECHNICAL INFORMATION LICENSED OR 
OTHERWISE PROVIDED TO LICENSEE HEREUNDER AND HEREBY DISCLAIMS THE SAME. 

    10.2.  UKRF DOES NOT WARRANT THE VALIDITY OF THE TECHNOLOGY LICENSED 
HEREUNDER AND MAKES NO REPRESENTATION WHATSOEVER WITH REGARD TO THE SCOPE OF 
SUCH TECHNOLOGY OR THAT SUCH TECHNOLOGY MAY BE EXPLOITED BY LICENSEE, 
AFFILIATES OR SUBLICENSEES WITHOUT INFRINGING ANY PATENTS.  IF BIOLOGICAL 
MATERIALS ARE LICENSED HEREUNDER, UKRF MAKES NO REPRESENTATION THAT SUCH 
MATERIALS OR THE METHODS USED IN MAKING OR USING SUCH MATERIALS ARE FREE FROM 
LIABILITY FOR PATENT INFRINGEMENT. 

    11.  NOTICES. 

    11.1.  All reports, notices and other communications from Licensee to 
UKRF as provided hereunder shall be in writing and mailed or delivered to: 

                   University of Kentucky Research Foundation
                   207 Administration Building
                   Lexington, Kentucky 40506

or other individuals or addresses as shall hereafter be furnished by written 
notice to Licensee. 

    11.2.  All reports, notices and other communications from  UKRF to 
Licensee as provided hereunder shall be in writing and mailed or delivered to:

                   Apollo Genetics, Inc.
                   222 Third Street, Suite 3121
                   Cambridge, Massachusetts 02142

with a copy to:    Bromberg & Sunstein
                   10 West Street - 7th Floor
                   Boston, Massachusetts 02111
                   Attn: Bruce D. Sunstein

or other individuals or addresses as shall hereafter be furnished by written 
notice to UKRF. 

    12.  RESTRICTIONS ON USE OF NAMES.  Licensee shall not use the names of 
UKRF, its related entities and its employees, or any adaptations thereof, in 
any advertising, promotional or sales literature or in any securities reports 
required by the Securities and Exchange Commission, without the prior written

                                      8



consent of UKRF in each case; provided, however, that Licensee (a) may offer 
to publications by employees of UKRF in the scientific literature or (b) may 
state that a license from UKRF has been granted as herein provided. 

    13.  MISCELLANEOUS. 

    13.1.  For the purpose of this Agreement and all services to be provided 
hereunder, both parties shall be, and shall be deemed to be, independent 
contractors and not agents or employees of the other. neither party shall 
have authority to make any statements representations or commitments of any 
kind, or to take any action, that will be binding on the other party. 

    13.2.  If any one or more of the provisions of this Agreement shall be 
held to be invalid, illegal or unenforceable, the validity, legality or 
enforceability of the remaining provisions of this Agreement shall not in any 
way be affected or impaired thereby. 

    13.3.  This Agreement shall be binding upon the parties, and  their 
successors and assigns.  

    13.4.  This instrument contains the entire Agreement between the parties 
hereto. No verbal agreement, conversation or representation between any 
officers, agents, or employees of the parties hereto either before or after 
the execution of this Agreement shall affect or modify any of the terms or 
obligations herein contained.

    13.5.  No change, modification, extension, termination or waiver of this 
Agreement, or any of the provisions herein contained, shall be valid unless 
made in writing and signed by a duly authorized representative of each party.

    13.6.  The captions are provided for convenience and are not to be used 
in construing this Agreement.

    13.7.  She parties agree that they have participated equally in the 
formation of this Agreement and that the language herein should not he 
presumptively construed against either of them. 

    13.8.  This Agreement may be signed in counterparts which collectively 
shall constitute a single agreement. 

    13.9.  Neither party shall be in breach hereof by reason of its delay z 
the performance of or failure to perform any of its obligations hereunder, if 
that delay or failure is caused by strikes, acts of God or the public enemy, 
riots, incendiaries, interference by civil or military authorities, 
compliance with governmental priorities for materials, or any fault beyond 
its control or without its fault or negligence. 

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    13.10.  The parties each, at any time or from time to time, shall execute 
and deliver or cause to be delivered such further assurances, instruments or 
documents as may be reasonably necessary to fulfill the terms and conditions 
of this Agreement. 

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
executed by their duly authorized representatives as of the date first above 
written. 

                   UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION


                   By:            /s/ Lee J. Magid              
                          ---------------------------------------
                   Name:          Lee J. Magid                  
                          ---------------------------------------
                   Title:         Executive Director, U.K.R.F.  
                          ---------------------------------------

                   APOLLO GENETICS, INC. 


                        /s/ Katherine Gordon                    
                   ---------------------------------------------
                   Katherine Gordon, Ph.D
                   President








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                                  Exhibit 1

                   UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
                          SPONSORED RESEARCH AGREEMENT



                           This Agreement has Expired









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