Document:

<PAGE>

                                                                    EXHIBIT 10.5

                              EMPLOYMENT AGREEMENT
                              --------------------

This employment agreement (the "Agreement") is effective as of July 15, 1999
(the "Effective Date"), by and between B.R.T. Biopharmaceuticals, Ltd., an
Israeli company with it principal place of business at Sha'arei Ha'ir, 216 Jaffa
Road, Jerusalem (the "Company") and Benjamin Corn, of Rehov Zelda 1, Jerusalem
(the "Employee").

Whereas the Company desires to employ the Employee in the position of President
(the "Position");

Whereas the Employee desires to be employed by the Company and fulfill the
responsibilities of the Position; and

Whereas the parties desire to set forth the conditions of employment pursuant to
which the Employee will be employed by the Company;

It is hereby agreed by and between the parties as follows:

1. Preamble

The preamble to this Agreement and any attachments thereto are an integral part
of this Agreement.

2. Job Description

The Employee shall be responsible for working with the Chief Executive Officer
to promote the research and development and business development activities of
the Company. He shall report directly to the Chief Executive Officer. The
description of responsibilities set forth herein shall serve as a general
statement of the duties, responsibilities and authority of the Employee.
Additional duties, responsibilities and authority may be assigned to the
Employee by the Chief Executive Officer from time to time in his discretion.

3. Working Hours

The Employee shall be employed by the Company on a full-time basis, namely for
not less than forty-four (44) hours per week (inclusive of meal time). The
Employee agrees that his position is considered to be a management position as
defined in the Hours of Work and Rest Law - 1951, which requires a special
measure of personal trust. Accordingly, the provisions of the Hours of Work and
Rest Law - 1951 shall not apply and the Employee shall not be entitled to
receive any additional payment for his work other than those that are set forth
in this Agreement.
<PAGE>

4. Term of Agreement

This Agreement shall take effect from the Effective Date and shall remain in
effect through the third anniversary of such date, unless it is earlier
terminated as hereinafter provided.

5. Annual Salary

        5.1.    The Employee's annual salary shall be as follows:

                5.1.1.  The Employee shall receive an annual gross salary of one
                        hundred and fifty thousand dollars ($150,000), payable
                        in New Israeli Shekels according the representative rate
                        of exchange in effect each month at the time Company
                        salaries are calculated. The Employees salary shall be
                        paid in twelve equal installments, monthly in arrears.

                5.1.2.  On each anniversary date of this Agreement, the
                        Employee's annual gross salary shall be increased by an
                        amount to be determined by the Board of Directors and
                        the Chief Executive Officer.

                5.1.3   The salary set forth in paragraph 5.1.1, above, shall be
                        referred to as the "Global Salary". The linkage of the
                        Global Salary to the United States dollar is in lieu of
                        any generally-applicable increases, whether the
                        statutory cost of living increase ("Tosefet Yoker") or
                        any other industry-wide increase applicable as the
                        result of collective bargaining agreements or other
                        order of the Ministry of Labor and Welfare (such as
                        Tzavei Harhava). By signing this Agreement and accepting
                        employment pursuant to its terms, the Employee
                        represents that s/he will not claim any such increase.

                5.1.4.  The Employee shall not be entitled to receive from the
                        Company any salary or payment of any kind other than the
                        Global Salary and other payments specifically set forth
                        in this Agreement or properly authorized by the Board of
                        Directors and, should the Employee be a director of the
                        Company at the time such other payments not specifically
                        included in this Agreement are made, by the shareholders
                        of the Company.
<PAGE>

        5.2.    Other Terms of Employment

                5.2.1.  Bonuses: The Employee shall be eligible to receive one
                        or more bonuses during any calendar year in the
                        discretion of the Chief Executive Officer, acting in
                        consultation with the Board of Directors.

                5.2.2.  Expenses: The Employee shall be entitled, in accordance
                        with the Company's standard policy in effect from time
                        to time, to be reimbursed for expenses (Hotza'ot Eshel)
                        incurred in Israel and abroad in connection with Company
                        business against receipt by the Company of appropriate
                        vouchers, receipts or other proof of the Employee's
                        expenditures.

                5.2.3.  Continuing Education Fund: The Employee shall be
                        entitled to participate in the Company's continuing
                        education fund (Keren Hishtalmut). The Company shall
                        contribute an amount equal to five percent (5%) of the
                        Employee's Global Salary and shall deduct two and a half
                        percent (2.5%) of the Employee's Global Salary and
                        transfer it as the Employee's contribution. The Employee
                        consents to the deduction of this amount as his
                        contribution to the continuing education fund. These
                        contributions will be calculated up to the permissible
                        tax-exempt salary ceiling according to the income tax
                        regulations in effect from time to time. If the amount
                        of the Company's contribution is greater than permitted
                        by those regulations, the Employee shall not have the
                        right to receive the excess amount.

                5.2.4.  Reserve Duty: The Employee shall be entitled to receive
                        his full Global Salary and other payments while
                        performing reserve duty, provided that any amount
                        received by the Employee from the I.D.F. or any other
                        source (excluding Damei Calcala) is transferred to the
                        Company or, in the alternative, an amount equal to that
                        received from the I.D.F. or any other source is deducted
                        from the Global Salary payable to the Employee.

                5.2.5.  Annual Leave and Recreation Pay (Damei Havra'a): The
                        Employee shall be entitled to fifteen (15) working days
                        of paid annual leave each year. The Employee shall not
                        be allowed to accrue more than thirty (30) working days
                        of annual leave except in unusual circumstances and with
                        the permission of the Company. Should the Employee's
                        annual leave balance exceed thirty (30) days at the end
                        of any calendar year, the excess number of days shall be
                        paid out in accordance with the provisions of the Annual
                        Leave Law - 1951. The Company shall also pay the
                        Employee for five (5) days of recreation (damei havra'a)
                        each year in accordance with the law and the normal
                        practice of the Company in effect from time to time.

                5.2.6.  Sickness and Disability Insurance: The Employee shall be
                        entitled to the number of days for sick leave permitted
                        by law. Compensation for sick days utilized shall be
                        paid according to his Global Salary only upon the
                        presentation of medical documentation as required by the
<PAGE>

                        Company. The Employee shall be covered by disability
                        insurance that provides monthly compensation. The cost
                        of such insurance shall be borne by the Company.
                        Notwithstanding the foregoing, the Employee shall not be
                        entitled to receive compensation for sick leave if such
                        compensation is covered by the Employee's disability
                        insurance referred to above. However, should the amounts
                        received by the Employee pursuant to such disability
                        insurance be less than the amount that is properly
                        payable as compensation for the Employee's available
                        sick leave, according to the Global Salary, the Company
                        shall pay the difference. It is understood and agreed
                        that unused sick leave cannot be redeemed by the
                        Employee. For the avoidance of doubt, it is understood
                        and agreed that the payments made by the Company in
                        consideration of sick leave covers all obligations of
                        the Company pursuant to the Sick Leave Law - 1976.

        5.3.    Pension Benefits and Severance Payments

                5.3.1.  The Company will pay into a Provident Fund (Kupat Gemel)
                        (in the meaning of paragraph 47 of the Income Tax
                        Ordinance) in the form of Manager's Insurance or another
                        form according to the Employee's choice and the
                        Company's agreement, an amount equal to thirteen and one
                        third percent (13 1/3%) from the monthly Global Salary
                        paid to the Employee, and the Employee will pay, on his
                        own account, an amount equal to five percent (5%) from
                        that Global Salary. The Employee agrees that the Company
                        shall be entitled to deduct the Employee's contribution
                        (5%) from the Employee's salary. For the avoidance of
                        doubt, it is clarified that under no circumstance shall
                        the Company's contribution exceed thirteen and one third
                        percent (13 1/3%) of the Global Salary in any one
                        month.

                5.3.2.  Five percent (5%) of the thirteen and one third percent
                        (13 1/3%) that the Company contributes as set
                        forth above and the five percent (5%) the Employee
                        contributes, together with linkage and interest on the
                        contributions, will be treated as pension benefits for
                        the Employee or his survivors. The remaining eight and
                        one third percent (8 1/3%) of the Company's
                        contribution, together with linkage and interest on that
                        portion, will be utilized to pay severance benefits to
                        the Employee or his descendants in the event of the
                        termination of his employment with the Company, except
                        in those circumstances discussed below.

                5.3.3.  In the event that the Employee chooses Manager's
                        Insurance, the policy shall belong to the Company as
                        long as it employs the Employee and it makes the
                        required payments on the policy. The payments made into
                        the Kupat Gemel pursuant to paragraph 5.3.1, above,
                        shall fulfill the Company's obligation for severance
                        payment pursuant to the Severance Compensation Law -
                        1963. Upon the termination of the Employee's employment,
                        for whatever reason, and upon his final departure from
                        the Company, the Employee or his descendants shall be
                        entitled to receive the ownership of all rights which
                        have accrued on his behalf in the Kupat Gemel or
                        the ownership of the Manager's
<PAGE>

                        Insurance policy, as appropriate and subject to the
                        provisions of section 6, below.

                5.3.4.  In the event that there is a difference in the
                        Employee's favor between the amount to which he is
                        entitled to receive pursuant to the Severance
                        Compensation Law - 1963 and the severance payment amount
                        (including linkage and interest) that is in the Kupat
                        Gemel or Manager's Insurance policy, the Company shall
                        pay that difference. The Company shall be obligated to
                        pay such difference whether the termination of the
                        Employee's employment is at the Employee's initiative or
                        the Company's, except in the case of termination
                        pursuant to paragraphs 6.3 and 6.4, below. For the
                        avoidance of doubt, it is understood that in the event
                        that the severance payment amount (including linkage and
                        interest) that is in the Employee's Kupat Gemel or
                        Manager's Insurance policy exceeds the amount to which
                        he is entitled to receive as severance compensation
                        pursuant to the Severance Compensation Law - 1963, the
                        difference shall not be transferred to the Employee,
                        including to his pension account, but shall be the
                        property of the Company.

6. Termination of Employment

        6.1.    Either party may terminate the Employee's employment with the
                Company without cause at any time upon three (3) month's notice.
                The Company shall have the right, in its sole discretion, to
                require the Employee to continue working for the Company during
                the notice period. If the Employer terminates the Employee
                without cause pursuant to this section, the Board of Directors
                shall take the necessary steps so that (a) any outstanding, but
                unvested, options granted to the Employee shall vest upon the
                effective date of his termination; and (b) the period during
                which the Employee shall be permitted to exercise such options
                shall be extended to two (2) years from the effective date of
                his termination as defined in the Share Option Plan governing
                the options in question.

        6.2.    The Employee's employment shall be terminated by his death or
                disability. (For purposes of this section, "disability" shall be
                deemed to have occurred if the Employee is unable, due to any
                physical or mental disease or condition, to perform his normal
                duties of employment for 120 consecutive days or 180 days in any
                twelve month period.) In such an event, he shall be entitled to
                continue to receive his annual salary for three (3) months
                following his last day of actual employment by the Company. Such
                amount shall be in addition to any severance payment he is
                entitled to receive according the provisions of the Severance
                Compensation Law - 1963. In addition, the Board of Directors
                shall take the necessary steps so that (a) any outstanding, but
                unvested, options granted to the Employee shall vest upon the
                effective date of his termination; and (b) the period during
                which the Employee shall be permitted to exercise such options
                shall be extended to two (2) years from the effective date of
                his termination as defined in the Share Option Plan governing
                the options in question. Should the Employee's employment be
                terminated as a
<PAGE>

                result of his death, the benefits granted herein, shall be
                granted instead to his lawful heir or heirs.

        6.3.    Notwithstanding the foregoing, the Company may terminate the
                Employee immediately and without prior notice in the following
                circumstances: (a) a material breach of the Employee's
                obligations pursuant to paragraphs 8.8, 8.9 and 8.10
                (confidentiality and non-competition); (b) a material breach by
                [lie Employee of any other provision of this Agreement, which is
                not cured by the Employee within fifteen (15) days after
                receiving notice thereof from the Company containing a
                description of the breach or breaches alleged to have occurred;
                (c) the habitual neglect or gross failure by the Employee to
                adequately perform the duties of his position; (d) any act of
                moral turpitude or criminal action connected to his employment
                with the Company or his place of employment; or (e) the
                Employee's refusal to comply with or his violation of lawful
                instructions of the Chief Executive Officer or the Board of
                Directors.

        6.4.    In the event that Employee's employment has been terminated in
                accordance with paragraph 6.3, above, the Employee shall not be
                entitled to receive am of the severance payments set forth in
                paragraphs 5.3.4 and 6.2, above.

7. Taxes and Other Payments

        7.1.    Unless otherwise specifically provided for in this Agreement,
                the Company shall not be liable for the payment of taxes or
                other payments for which the Employee is responsible as result
                of this Agreement or any other legal provision, and the Employee
                shall be personally liable for such taxes and other payments.

        7.2.    The Employee hereby agrees that the Company shall deduct from
                his Global Salary the Employee's national insurance fees, income
                tax and other amounts required by law or the terms of this
                Agreement. The Company shall provide the Employee with
                documentation of such deductions.

8. The Obligations of the Employee

        8.1.    The Employee agrees to devote his entire business time, energy,
                abilities and experience to the performance of his duties,
                effectively and in good faith.

        8.2.    During the period of his employment, the Employee shall not be
                employed, whether or not during regular business hours, for pay
                by any other party other than the Company, except for teaching
                activities approved by the Chief Executive Officer. The Employee
                must receive the prior written consent of the Company before
                assuming an unpaid position outside the Company. Notwithstanding
                the foregoing, the Employee may, with the written permission of
                the Chairman of the Board of Directors, become a member of the
                Board of Directors of another company and may accept any
                compensation in connection with such position.
<PAGE>

        8.3.    The Employee agrees to immediately inform the Company of any
                Company issue or transaction in which the Employee has a direct
                or indirect personal interest and/or where such issue or
                transaction could cause a conflict of interest for the Employee
                in the fulfillment of his responsibilities as an employee of the
                Company.

        8.4.    The Employee hereby gives irrevocable instructions and
                permission to the Company to deduct from any amounts owed to the
                Employee by the Company, including amounts payable as severance
                compensation, (a) any debt he has or will have to the Company;
                and/or (b) any amount that was wrongfully or mistakenly paid to
                him by the Company. Any such amounts to be deducted shall be
                calculated in real terms as of the date of the deduction,
                including linkage to cost of living index.

        8.5.    The Company may at its discretion and at any time apply for and
                procure as owner and for its own benefit and at its own expense,
                insurance on the life of the Employee ("Key Man Life Insurance")
                in such amounts and in such form or forms as the Company may
                choose. The Employee shall cooperate with the Company in
                procuring such insurance and shall, at the Company's request,
                submit to such medical examinations, supply such information and
                execute such documents as may be required by the insurance
                company or companies to whom the Company has applied for such
                insurance. Neither the Employee nor any of his dependents shall
                have any interest whatsoever in any such policy or policies, or
                in the proceeds thereof.

        8.6.    The Employee declares that the terms and conditions of his
                employment are personal and confidential and will not be
                disclosed by him.

        8.7.    The Employee declares that he is free to enter into this
                Agreement and that he has no obligations of any kind to any
                third party that would impair this Agreement, either as an
                employee or an independent contractor. The Employee further
                declares that as long as he remains an employee of the Company,
                he will not incur any such obligations.

        8.8.    The Employee agrees to keep confidential (a) all professional,
                scientific, commercial, and business information; and (b) any
                other information or document that comes to the Employee's
                knowledge in connection with the affairs of the Company
                (collectively, the "Confidential Information"), and agrees not
                to use or exploit the Confidential Information or to disclose it
                to any third party where such use, exploitation or disclosure in
                not directly related to the affairs of the Company, unless the
                Company gives prior written authorization of such disclosure.

        8.9.    The Employees agrees that during his employment by the Company
                and thereafter he (a) will not disseminate or otherwise make use
                of the Confidential Information or of other non-public
                information of which he learned while working for the Company,
                except where such dissemination or use is directly related to
                the affairs of the Company; (b) will maintain the
                confidentiality of the Confidential Information; and (c) will
                not in any way act to injure the reputation of the Company or
                any of its affiliated companies.
<PAGE>

        8.10    The Employee understands and recognizes that his services to the
                Company are special and unique. Therefore, he agrees that during
                the term of this Agreement and for one (1) year after the
                termination for any reason of his employment, he shall not be
                employed in or give any services to any business or third party
                that competes with the Company or whose activities conflict with
                the activities of the Company, unless the Chairman of the Board
                of Directors has given his explicit written consent prior the
                commencement of such employment or the giving of such services.

        8.11.   Upon termination of his employment, the Employee agrees to
                assist the Company with an orderly transition of his
                responsibilities and to return to the Company any documents,
                information and/or materials that were given to him or which
                were created by him in connection with his employment.

9. Intellectual Property Rights

        9.1.    The Employee declares that he is aware that anything that is
                done by him in the Company or in connection with the Company,
                whether it be an invention, a discovery, or the development of
                an idea or a thing, all within the framework of the Company's
                business (the "Development") shall belong to and be controlled
                by the Company, unless the Board of Directors shall, in writing,
                direct otherwise.

        9.2.    The Company shall have the right to fully utilize and exploit
                the Development, as it sees fit, including changing it,
                registering part or all of it as a patent, whether in Israel or
                abroad, selling it, transferring it to a third party, all
                without being required to either receive the Employee's consent
                or pay the Employee any additional payment for such Development
                apart from any payment he receives pursuant to this Agreement.

        9.3.    The Development and any subsequent intellectual property arising
                therefrom shall remain the sole property of the Employer even
                after the Employee's employment terminates for any reason. The
                termination of this Agreement, whether due to its breach or its
                own terms, shall not impair the Company's exclusive rights in
                the Development. Notwithstanding the termination of this
                Agreement, the Board of Directors shall have the discretion to
                award the Employee a cash payment in accordance with the terms
                of paragraph 5.2.1, above, as a result of any Development or
                subsequent intellectual property arising therefrom developed
                primarily by the Employee.

        9.4.    The Employee may not do anything with the Development or any
                related materials without the knowledge and prior consent of the
                Company. The Employee declares that he neither has nor will have
                any rights in the Development or its fruits and that all rights
                to the Development and its fruits shall fully reside in the
                Company.

        9.5.    Even in the event that at the time of the termination of the
                Employee's employment for any reason the Development has not
                been completed, the Employee shall be prohibited from any
                continued activity in connection with
<PAGE>

                the subject of the Development, alone or in concert with others
                that is not explicitly allowed in writing by the Company. The
                Company alone will be the sole owner of the uncompleted
                Development and shall have the sole right to complete the
                Development or to take any other action in connection with the
                Development.

10. Indemnification

The Company shall take whatever steps are necessary to establish a policy of
indemnifying its officers, including, but not limited to the Employee, for all
actions taken in good faith in pursuit of their duties and obligations to the
Company. Such steps shall include, but shall not necessarily be limited to, the
obtaining of an appropriate level of Directors and Officers Liability coverage.

11. General

        11.1.   It is agreed that the provisions of this Agreement represent the
                full scope of the agreement between the parties and that neither
                side shall be bound by any promises, declarations, exhibits,
                agreements or obligations, oral or written, that are not
                included in this Agreement prior to its execution. Any changes
                or amendments to this Agreement must be in writing and signed by
                both parties.

        11.2.   This Agreement shall be governed by, and construed and
                interpreted under, the laws of the State of Israel. The parties
                agree that any legal claim lodged by one party against the other
                arising from the terms of this Agreement shall be adjudicated
                only by the appropriate court in Jerusalem, Israel.

        11.3.   If any provision of this Agreement shall be declared by a court
                of competent jurisdiction to be invalid, illegal or incapable of
                being enforced in whole or in part, the remaining conditions and
                provisions or portions thereof shall nevertheless remain in full
                force and effect and enforceable, and no provision shall be
                deemed dependent upon any other covenant or provision unless so
                expressed herein.

        11.4.   The rights, benefits, duties and obligations under this
                Agreement shall inure to, and be binding upon, the Company, its
                successors and assigns, and upon the Employee and his legal
                representatives. This Agreement constitutes a personal service
                agreement, and the performance of the Employee's obligations
                hereunder may not be transferred or assigned by the Employee.

        11.5    The failure of either party to insist upon the strict
                performance of any of the terms, conditions and provisions of
                this Agreement shall not be construed as a waiver or
                relinquishment of future compliance therewith or with any other
                term, condition or provision hereof, and said terms, conditions
                and provisions shall remain in full force and effect. No waiver
                of any term or condition of this Agreement on the part of either
                party shall be effective or ally purpose whatsoever unless such
                waiver is in writing and signed by such party.

        11.6    The headings of Sections are inserted for convenience and shall
                not affect any interpretation of this Agreement.
<PAGE>

12. Notices

        12.1.   A notice that is sent by registered mail to a party at its
                address as set forth in paragraph 12.2, below, shall be deemed
                received three (3) days after its posting, and the receipt
                stamped by the post office shall represent definitive evidence
                of the date of mailing.

        12.2.   The addresses of the parties for the purposes of this Agreement
                are:

                Partee Ltd.:

                216 Jaffa Road
                Jerusalem 94383

                Employee:

                Rehov Zelda I
                Jerusalem

IN WITNESS WHEREOF the parties have hereunto set their hands at the place and on
the date first above written.

B.R.T. Biopharmaceuticals, Ltd.
By

 /s/ Robert Trachtenberg                    /s/ Benjamin Corn
-------------------------------            -------------------------------------
Secretary                                  Employee<PAGE>

                                                                    EXHIBIT 10.6

                          EXCLUSIVE LICENSE AGREEMENT

                                    BETWEEN

                     CHILDREN'S MEDICAL CENTER CORPORATION

                                      AND

                         LAKARO BIOPHARMACEUTICALS, INC.
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
Articles                                                                Page
<S>                                                                     <C>
I.        Definitions                                                     2

II.       Grant                                                           4

III.      Due Diligence                                                   6

IV.       Royalties and Other Payments                                    8

V.        Reports and Records                                             10

VI.       Patent Prosecution                                              12

VII.      Infringement                                                    12

VIII.     Indemnification and Insurance Provisions                        14

IX.       Export Controls                                                 15

X.        Non-Use of Names                                                16

XI.       Assignment                                                      16

XII.      Dispute Resolution and Arbitration                              16

XIII.     Term and Termination                                            17

XIV.      Payments, Notices and Other Communications                      18

XV.       General Provisions                                              19

          Appendix 1.  Patent Rights

          Appendix 2.  Sponsored Research Agreement
</TABLE>
<PAGE>

                                                                    EXHIBIT 10.6

                          EXCLUSIVE LICENSE AGREEMENT

     This Agreement is made and entered into as of the date last written below
(the "Effective Date"), by and between CHILDREN'S MEDICAL CENTER CORPORATION, a
charitable corporation duly organized and existing under the laws of the
Commonwealth of Massachusetts and having its principal office at 300 Longwood
Avenue, Boston, Massachusetts, 02115, U.S.A. (hereinafter referred to as
"CMCC"), and Lakaro BIOPHARMACEUTICALS, INC., organized and existing under the
laws of Delaware and having its principal office at 216 Jaffa Road, Jerusalem
94383 Israel (hereinafter referred to as "Licensee").

     WHEREAS, CMCC is the owner of CMCC 547 "Short peptides which selectively
modulate the activity of protein tyrosine kinases"  by Dr. Shmuel Ben-Sasson
(the "547 Invention"), and CMCC  and YISSUM RESEARCH DEVELOPMENT COMPANY OF THE
HEBREW UNIVERSITY OF JERUSALEM ("YISSUM") are the co-owners of CMCC 590 "Short
Peptides which selectively modulate the activity of serine/threonine kinases",
also by Dr. Shmuel Ben-Sasson (the "590 Invention"), and YISSUM has granted to
CMCC the right to grant licenses under YISSUM's interest in the 590 Invention.
The 547 Invention and the 590 Invention will be referred to hereinafter as the
"Background Patent Rights");

     WHEREAS, YISSUM and Licensee have entered into an agreement of even date
herewith through which Licensee will fund YISSUM to conduct further research
related to the subject matter of the Background Patent Rights, to be performed
at Hebrew University under the supervision of Dr. Ben-Sasson, with a subcontract
for research to be performed at Children's Hospital (the "Sponsored Research
Agreement") attached hereto as Appendix 2 and incorporated herein by reference,
and YISSUM has agreed that any new inventions arising out of said research
("Research Patent Rights") shall be subject to the terms of this License
Agreement;

     WHEREAS, CMCC has the right to grant exclusive licenses under certain
Patent Rights (as that term shall be defined hereafter), subject only to a
royalty-free, nonexclusive license heretofore granted to the United States
Government for those patents developed with U.S. Government funding;

     WHEREAS, CMCC and YISSUM desire to have the Patent Rights utilized in the
public interest and CMCC is willing to grant a license to Licensee thereunder on
the terms and conditions described herein;

     WHEREAS, Licensee has represented to CMCC that Licensee is ready, willing
and able to engage in the commercial development, production, manufacture,
marketing and sale of Licensed Products (as that term shall be defined
hereafter) and/or the use of Licensed Processes (as that term shall be defined
hereafter) and that it shall commit itself to a thorough, vigorous and diligent
program of exploiting the Patent Rights in accordance with the terms and
conditions described herein so that public utilization shall result therefrom;
and
<PAGE>

     WHEREAS, Licensee desires to obtain an exclusive license under the Patent
Rights on the terms and conditions of this Agreement.

     NOW, THEREFORE, in consideration of the premises and the mutual covenants
contained herein, the parties hereto agree as follows:

                            ARTICLE I.  DEFINITIONS

     For the purpose of this Agreement, the following words and phrases shall
have the meanings set forth below:

     A.   "Affiliate" shall mean any company or other legal entity controlling,
controlled by or under common control with Licensee.  For purposes of the
definition of "Affiliate" the term "control" shall mean: (i) in the case of a
corporate entity, the direct or indirect ownership of at least a majority of the
stock or participating shares entitled to vote for the election of directors of
that entity; (ii) in the case of a partnership, the power customarily held by a
general partner to direct the management and policies of such partnership; or
(iii) in the case of a joint venture, whether in corporate, partnership or other
legal form, a more than nominal economic interest and managerial role.

     B.   "Combination Product(s) or Process(es)" shall mean a product or
process that includes a Licensed Product or Licensed Process sold in combination
with another component(s) whose manufacture, use or sale by an unlicensed party
would not constitute an infringement of the Patent Rights.

     C.   "Field of Use" shall mean the diagnosis, prevention or treatment of
any and all diseases or conditions in humans or animals.

     D.   "First Commercial Sale" shall mean with respect to each country:  (i)
the first sales in excess of $100,000 of Licensed Products or Licensed Processes
by Licensee, following approval of such Licensed Product's or Licensed Process'
marketing by the appropriate governmental agency, if any such approval is
necessary, for the country in which the sale is to be made; or (ii) if in a
country where governmental approval is not required, the first sale in that
country of the Licensed Product or Licensed Process.

     E.   "Licensed Product" shall mean any product or part thereof:

          1.   The manufacture, use or sale of which would infringe any one of
               the issued, valid, enforceable, unexpired claim(s) or any one of
               the pending claim(s) contained in the Patent Rights in any
               country.

          2.   The manufacture of which uses a "Licensed Process" as that term
               shall be defined hereafter.
<PAGE>

     F.   "Licensed Process" shall mean any process that would infringe any one
of the issued, valid, enforceable, unexpired claim(s) or any one of the pending
claim(s) contained in the Patent Rights in any country.

     G.   "Licensee" shall mean Lakaro Biopharmaceuticals, Inc. and/or its
successor(s) or assignee(s) and/or its Affiliates.

     H.   "Net Sales" shall mean gross receipts received by Licensee or
Licensee's Affiliates for Licensed Products and Licensed Processes produced
hereunder, including any subsidies, co-payments, incentive compensation, or
other similar payments received by Licensee from any governmental agency (other
than for research and development) directly in consideration of Licensee's sales
to third parties, less the sum of the following:

          1.   Discounts allowed in amounts customary in the trade.

          2.   Sales taxes, tariff duties and/or use taxes directly imposed and
               with reference to particular sales.

          3.   Packaging and freight charges, outbound transportation and
               delivery charges (including insurance premiums related to
               transportation and delivery) prepaid or allowed.

          4.   Amounts allowed or credited on returns.

          5.   Bad debt deductions actually written off during the accounting
               period.

     No deductions shall be made for commissions paid to individuals whether
they are with independent sales agencies or regularly employed by Licensee and
on its payroll or for the cost of collections.  Licensed Products and Licensed
Processes shall be considered "sold" when billed out or invoiced.
Notwithstanding anything herein to the contrary, the following shall not be
considered a sale of a Licensed Product or Licensed Process under this
Agreement:  (i) the transfer of a Licensed Product or Licensed Process to an
Affiliate for sale by the Affiliate in a transaction that will be royalty
bearing; (ii) the transfer of a Licensed Product or Licensed Process to a third
party without consideration to Licensee in connection with the development or
testing of a Licensed Product or Licensed Process; or (iii) the transfer of a
Licensed Product or Licensed Process to a third party without consideration in
connection with the marketing or promotion of the Licensed Product or Licensed
Process.

     I.   "Patent Rights" shall mean all of the following intellectual property
included in the Background Patent Rights and the Research Patent Rights which
CMCC owns or has the right to license during the term of this Agreement:

          1.   All patents and/or patent applications listed in Appendix 1
               attached hereto and incorporated herein by reference, as this
               Appendix 1
<PAGE>

               may be amended from time to time to include Research Patent
               Rights, and divisionals and continuations thereof.

          2.   The United States and foreign patents issued from the
               applications listed in Appendix 1 and from divisionals and
               continuations of those applications.

          3.   Claims of United States and foreign continuation-in-part
               applications, and of the resulting patents, which relate to
               subject matter specifically described in the United States and
               foreign patent applications described in Appendix 1.

          4.   Claims of all later filed foreign patent applications, and of the
               resulting patents, which relate to subject matter specifically
               described in the United States patent and/or patent applications
               described in subparagraphs 1, 2 or 3 of this Article I, Paragraph
               I.

          5.   Any reissues, divisions, amendments or extensions of the United
               States or foreign patents described in subparagraphs 1, 2, 3 or 4
               of this Article I, Paragraph I.

     J.   "Sublicensee" shall mean a person or entity unaffiliated with Licensee
to whom Licensee has granted an arm's length sublicense under this Agreement.

                              ARTICLE II.  GRANT

     A.   CMCC hereby grants to Licensee the worldwide right and exclusive
license to make, have made, use, lease and sell the Licensed Products and to
practice the Licensed Processes for the Field of Use to the end of the term for
which the Patent Rights are granted, unless sooner terminated as provided in
this Agreement.

     B.   Notwithstanding anything above to the contrary, CMCC shall retain a
royalty-free, nonexclusive, irrevocable license to practice, and to sublicense
other non-profit research organizations to practice, the Patent Rights for
noncommercial research purposes only.

     C.   Notwithstanding anything herein to the contrary, the license granted
hereunder shall be subject to the rights of the United States government, if
any, under Public Laws 96-517, 97-226, and 98-620, codified at 35 U.S.C. sec.
200-212 and any regulations promulgated thereunder.

     D. (1)  To the best knowledge and belief of the CMCC Technology Transfer
Office as of the date of this Agreement, CMCC has all right, title, and interest
in and to the 547 Invention, including exclusive, absolute, irrevocable right,
title and interest thereto, free and clear of all liens, charges, encumbrances
or other restrictions or limitations of any kind whatsoever and to the best
knowledge and belief of the CMCC Technology Transfer Office as of the date of
this Agreement, there are no licenses
<PAGE>

options, restrictions, liens, rights of third parties, disputes, royalty
obligations, proceedings or claims relating to, affecting or limiting its rights
or rights of Licensee under this Agreement with respect to any part or all of
the Patent Rights and their use as contemplated in the underlying patent
applications as presently drafted.

      (2) To the best knowledge and belief of the CMCC Technology Transfer
Office as of the date of this Agreement, CMCC has all right, title, and interest
in and the CMCC's ownership interest in the 590 Invention, including exclusive,
absolute, irrevocable right, title and interest thereto, free and clear of all
liens, charges, encumbrances or other restrictions or limitations of any kind
whatsoever and to the best knowledge and belief of the CMCC Technology Transfer
Office as of the date of this Agreement, there are no licenses options,
restrictions, liens, rights of third parties, disputes, royalty obligations,
proceedings or claims relating to, affecting or limiting its rights or rights of
Licensee under this Agreement with respect to any part or all of CMCC's
ownership interest in the 590 Invention and their use as contemplated in the
underlying patent applications as presently drafted.

      (3) YISSUM has represented to CMCC that to the best knowledge and belief
of YISSUM as of the date of this Agreement, YISSUM has all right, title, and
interest in and to YISSUM's ownership interest in the 590 Invention, including
exclusive, absolute, irrevocable right, title and interest thereto, free and
clear of all liens, charges, encumbrances or other restrictions or limitations
of any kind whatsoever and YISSUM has also represented to CMCC that  to the best
knowledge and belief of YISSUM as of the date of this Agreement, there are no
licenses options, restrictions, liens, rights of third parties, disputes,
royalty obligations, proceedings or claims relating to, affecting or limiting
its rights or rights of Licensee under this Agreement with respect to any part
or all of YISSUM's ownership interest in the 590 Invention and their use as
contemplated in the underlying patent applications as presently drafted.

      (4) The CMCC Technology Transfer Office is not aware of, and YISSUM has
represented to CMCC that YISSUM is not aware of, any ownership interest in the
590 Invention other than CMCC's and YISSUM's.

      (5) YISSUM and CMCC have entered into an agreement through which YISSUM
has granted CMCC the exclusive right to grant a license to YISSUM's interest in
the 590 Invention.

      (6). To the best knowledge and belief of the CMCC Technology Transfer
Office as of the date of this Agreement there is no claim, pending or
threatened, of infringement, interference or invalidity regarding, any part or
all of the Patent Rights and their use as presently drafted.

     E.   Licensee agrees that Licensed Products leased or sold *** shall be
 manufactured substantially ***.

     F.   In order to establish exclusivity for Licensee, CMCC hereby agrees
that it shall not, without Licensee's prior written consent, grant to any other
commercial party a license to make, have made, use, lease and/or sell Licensed
Products or to use the
<PAGE>

Licensed Processes in the Field of Use during the period of time in which this
Agreement is in effect, except as otherwise specified in this Agreement or as
required by law to grant rights to the United States Government.

     G.   Licensee shall have the right to enter into sublicensing agreements
with respect to any of the rights, privileges, and licenses granted hereunder,
subject to the terms and conditions hereof.  Except as provided in Section II K
below, such sublicenses will terminate upon the termination of Licensee's rights
granted herein unless events of default are cured by Licensee or Sublicensee
within thirty (30) days of notification by CMCC of such a default and/or as
provided by the terms of this Agreement.

     H.   Licensee agrees that any sublicense granted by it shall provide that
the obligations to CMCC of Articles II (Grant), V (Reports and Records), VII
(Infringement), VIII (Insurance and Indemnification), IX (Export Controls), X
(Non-Use of Names), XI (Assignment), XII (Dispute Resolution), XIII (Term and
Termination) and XV (Miscellaneous Provisions) of this Agreement shall be
binding upon the sublicensee as if it were a party to this Agreement.  Licensee
further agrees to attach a copy of this Agreement to all sublicense agreements,
deleting economic terms when and as appropriate.

     I.   Licensee agrees to provide to CMCC notice of any sublicense granted
hereunder and to forward to CMCC a copy of any and all fully executed sublicense
agreements and other documents such as side letters that are pertinent to an
accounting of Licensee's payment obligations under this Agreement and/or to an
evaluation of Licensee's performance of its due diligence obligations under
Article III.  Licensee further agrees to forward to CMCC annually a copy of such
reports received by Licensee from its sublicensees during the preceding twelve
(12) month period as shall be pertinent to a royalty accounting under the
applicable sublicense.

     J.   Licensee shall advise CMCC in writing of any consideration received
from sublicensees.  Licensee shall not accept from any sublicensee anything of
value in lieu of cash payments to discharge sublicensee's payment obligations
under any sublicense granted under this Agreement, without the express written
permission of CMCC, which permission shall not be unreasonably withheld.

     K.   CMCC agrees that if Licensee has provided to CMCC notice that Licensee
has granted a sublicense to a sublicensee under this Agreement, then in the
event CMCC terminates this Agreement for any reason provided hereafter, CMCC
shall provide to such sublicensee no less than thirty (30) days prior to the
effective date of said termination, written notice of said termination at the
address specified by Licensee to CMCC in Licensee's notice to CMCC under
Paragraph H of this Article II.  CMCC agrees that upon the sublicensee's notice
as described below and provided the sublicensee is not in breach of its
sublicense, CMCC shall grant to such sublicensee license rights and terms
equivalent to the sublicense rights and terms which the Licensee shall have
granted to said sublicensee; provided that the sublicensee shall remain a
sublicensee under this Agreement for a period of at least sixty (60) days
following receipt of notice from CMCC.  Sublicensee shall during said sixty (60)
day

<PAGE>

period provide to CMCC notice wherein the sublicensee: (i) agrees to abide by
all of the terms and conditions of this Agreement applicable to sublicensees and
to discharge directly all pertinent obligations of Licensee which Licensee is
obligated hereunder to discharge; and (ii) acknowledges that CMCC shall have no
obligations to the sublicensee other than its obligations set forth in this
Agreement with regard to Licensee.

     L.   The license granted hereunder shall not be construed to confer any
rights upon Licensee by implication, estoppel or otherwise as to any technology
not described in the Patent Rights.

                          ARTICLE III.  DUE DILIGENCE

     A.   Licensee shall use its good faith and reasonable best efforts to bring
one or more Licensed Products and/or Licensed Processes to market as soon as
reasonably practicable, consistent with sound and reasonable business practices
and judgment, through a thorough, vigorous and diligent program for exploitation
of the Patent Rights.  Thereafter, Licensee agrees that until expiration or
termination of this Agreement, Licensee shall continue active and diligent
efforts to keep Licensed Products and/or Licensed Processes reasonably available
to the public.  In the event Licensee decides not to exploit a licensed Patent
Right, it shall promptly inform CMCC in writing and shall surrender to CMCC its
license to that Patent Right.

     B.   Licensee shall accomplish development of Licensed Products and/or
Licensed Processes according to the following timetable:

          1.   file an Initial New Drug Application ("IND") for a Licensed
               Product with United States Food and Drug Administration ("FDA")
               or its foreign the equivalent in a country with reasonably
               comparable requirements within *** from the identification of the
               first lead compound; and

          2.   file a New Drug Application ("NDA") for a Licensed Product with
               the United States FDA or its foreign equivalent in a country with
               reasonably comparable requirements within *** from the first
               filing of an IND with the United States FDA or its foreign
               equivalent.

The above milestones and completion times shall be referred to hereinafter as
the "Development Plan".

     C.   Licensee shall use good faith and diligent efforts to accomplish the
milestones set forth in the Development Plan and to manufacture and distribute
Licensed Products and Licensed Processes.

     D.   Notwithstanding anything above to the contrary, CMCC shall not
unreasonably withhold its assent to any revision of the objective(s) set forth
in the
<PAGE>

Development Plan when requested in writing by Licensee and supported by evidence
reasonably acceptable to CMCC: (i) of technical difficulties or delays in the
clinical studies or regulatory process that Licensee could not have reasonably
avoided; or (ii) that Licensee, its Affiliates and/or sublicensees have expended
good faith and diligent efforts and adequate resources to meet said objective.

     E.   In the event CMCC reasonably believes that Licensee is not diligently
seeking to achieve the objectives set forth in the Development Plan in a timely
manner, CMCC shall so notify Licensee in writing. Licensee shall have the
option, exercisable by written notice to CMCC provided within ten (10) days
after receipt of any such notice, to either: (i) receive a *** grace period to
establish to CMCC's reasonable satisfaction that Licensee is expending its good
faith and diligent efforts and adequate resources to achieve said objectives; or
(ii) agree to CMCC's termination of this Agreement as provided hereafter. In the
event Licensee agrees to termination of this Agreement, CMCC shall immediately
terminate the license granted to Licensee under this Agreement. In the event
Licensee fails to establish its diligence to CMCC's reasonable satisfaction as
provided above prior to expiration of the *** grace period, CMCC shall have the
right to terminate the license granted to Licensee under this Agreement.

     F.   In the event that Licensee fails to meet the objective(s) set forth in
the Development Plan in a timely manner, CMCC shall notify Licensee thereof in
writing, and Licensee shall have thirty (30) days following such notification to
establish to the reasonable satisfaction of CMCC that (i) it has met such
objective(s); or (ii) a revision to the Development Plan is necessary and
appropriate as contemplated above. In the event that Licensee fails to establish
the same to CMCC's reasonable satisfaction, CMCC shall have the right in its
discretion to terminate the license granted to Licensee under this Agreement or
to convert the license granted to Licensee hereunder to a non-exclusive license
on financial terms and conditions mutually agreed to by CMCC and Licensee.

     G.   Licensee shall use its best efforts to secure an initial round of
financing of at least *** for Licensee through a private placement and/or public
offering of debt or equity securities of Licensee (the "Financing"). The total
pre-money valuation of any such Financing shall be not less than ***. If
Licensee has not raised at least *** of gross proceeds on the basis described in
the preceding sentence within *** months of the Effective Date, then this
License Agreement shall terminate and all right, title and interest in the
Patent Rights shall revert to CMCC (and/or YISSUM, as appropriate) and CMCC
shall return any and all shares or warrants beneficially owned by CMCC and
YISSUM.

                   ARTICLE IV.  ROYALTIES AND OTHER PAYMENTS

     A.   For the rights, privileges and exclusive licenses granted hereunder,
Licensee shall pay to CMCC the following amounts in the manner hereinafter
provided until the end of the term of the last to expire Patent Right, unless
this Agreement shall be sooner terminated as hereinafter provided:
<PAGE>

          1.   Subject to the terms and conditions of the Sponsored Research
               Agreement, Licensee shall sponsor research at YISSUM in an amount
               an in accordance with the payment schedule set forth therein.

          2.   Upon the execution of this Agreement, Licensee shall issue to
               CMCC 537,025 shares of its common stock, at par value ($0.001 per
               share, which shall constitute 7.842% of the issued and
               outstanding shares of common stock of the Company on the date
               these shares are issued to CMCC. In any future registrations of
               Licensee's common stock, Licensee shall treat the shares of
               common stock being issued to CMCC pursuant to this Agreement and
               the shares underlying the warrants described in Article IV.A.3,
               below, no less favorably than any of its shares of common stock
               issued and outstanding as of the date of this Agreement.

          3.   Licensee shall grant to CMCC ten (10) year net exercise warrants
               to purchase 250,000 shares of common stock (the "Common Stock"),
               at a price of $0.01 per share, vesting as follows:

                         (a) One-half of the warrants shall vest upon the
               approval of the first IND for a Licensed Product or Licensed
               Process by the United States FDA, or its foreign equivalent.

                         (b) One-half of the warrants shall vest upon the
               approval of an NDA for a Licensed Product or Licensed Process by
               the FDA, or foreign equivalent.

          4.   If so instructed by CMCC, Licensee shall issue to YISSUM, instead
               of to CMCC, some or all of the shares due to CMCC as defined in
               Section A.2 and some or all of the warrants due to CMCC as
               defined in Section A.3.

          5.   In any calendar year, royalties in an amount equal to *** of Net
               Sales of Licensed Products or Licensed Processes used, leased or
               sold by and/or for Licensee and/or its Affiliates.

          6.   In the event that Licensee has granted sublicenses under this
               Agreement, *** of any and all royalties received by Licensee on
               sales from said sublicensees, and *** of any and all payments
               received by Licensee from said sublicensees in consideration of
               permitting the sublicensee to practice the Patent Rights,
               including but not limited to sublicense issue fees, any lump sum
               payments, milestone payments, technology transfer payments, or
               other similar fees, but not including payments for research and
               development, including pre-clinical and clinical trials;
               provided, however, that overhead charges for such research and
               development are
<PAGE>

               reasonable and customary, and not including payment on account of
               issuance of debt or equity securities of Licensee at fair value.

     B.   No multiple royalties shall be payable because the use, lease or sale
of any Licensed Product or Licensed Process is, or shall be, covered by more
than one valid and unexpired claim contained in the Patent Rights.  In addition,
royalties shall be paid for a Licensed Product or Licensed Process based upon
only one of the paragraphs A.4 or A.5 above ( that is, royalties on direct sales
of a Licensed Product or Licensed Process by Licensee or its Affiliates shall be
based only on paragraph A.4, while royalties on sales of a Licensed Product or
Licensed Process by any sublicensee shall be based only on paragraph A.5 so as
to avoid double counting).

     C.   To the extent that Licensee obtains subsequent to the date of this
Agreement licenses to third party patents or other intellectual property that
are necessary to produce or sell Licensed Products or Licensed Processes,
Licensee may deduct from the royalty due to CMCC *** of the royalties due on
such third party patents or intellectual property up to an amount equal to ***
of royalties hereunder.

     D.   In the event that a Licensed Product is sold in the form of a
combination product containing one or more products or technologies which are
themselves not a Licensed Product, the Net Sales for such a combination product
shall be calculated by multiplying the sales price of such combination product
by the fraction A/ (A+B) where A is the invoice price of the Licensed Product,
or if sold to an Affiliate the Fair Market Value the Licensed Product would
command if sold to a third party, and B is the total invoice price of the other
products or technologies.  In the case of a combination product which includes
one or more Licensed Products, the Net Sales for such combination product upon
which the royalty due to CMCC is based shall not be less than the sum of Net
Sales for each Licensed Product.

     E.   Royalty payments shall be paid in United States dollars in Boston,
Massachusetts, or at such other place as CMCC may reasonably designate
consistent with the laws and regulations controlling in any foreign country.  If
the currency conversion shall be required in connection with the payments of
royalties or other amounts hereunder, the conversion shall be made by using the
exchange rate prevailing at the Bank of Boston on the last business day of the
calendar quarterly reporting period to which such royalty payments relate.

     F.   The royalty payments set forth in this Agreement shall, if overdue,
bear interest until payment at a per annum rate of *** above the prime rate in
effect at the Bank of Boston on the due date. The payment of such interest shall
not foreclose CMCC from exercising any other rights it may have as a consequence
of the lateness of any payment.
<PAGE>

                        ARTICLE V.  REPORTS AND RECORDS

     A.   Licensee shall keep, and shall require its Affiliates and sublicensees
to keep, full, true and accurate books of account in accordance with generally
accepted accounting principles and containing sufficient detail to enable CMCC
to determine the royalty and other amounts payable to CMCC under this Agreement.
Said books of account shall be kept at Licensee's principal place of business or
the principal place of business of the appropriate division of Licensee to which
this Agreement relates.  Said books and the supporting data shall be retained
for at least three (3) years following the end of the calendar year to which
they pertain.

     B.   CMCC shall have the right to audit the books of account described
above from time to time upon reasonable notice to Licensee and in no event more
than quarterly to the extent necessary to verify the reports provided for herein
or compliance in other respects with this Agreement.  CMCC or its agents shall
perform these audits at CMCC's expense during Licensee's regular business hours.

     C.   Licensee shall deliver to CMCC true and accurate reports by March
31st, for the period July 1st through December 31st of the previous year, and on
September 30th, for the period January 1st through June 30th of the current
year, giving such particulars of the business conducted by Licensee, its
Affiliates and its sublicensees under this Agreement as shall be pertinent to a
royalty accounting hereunder and to verify Licensee's activities with respect to
achieving the objectives of the Development Plan described in Article III above.
These reports shall include at least the following:

          1.   Number of Licensed Products and Licensed Processes manufactured
               and sold.

          2.   Aggregate billings for Licensed Products and Licensed Processes
               sold.

          3.   Applicable deductions.

          4.   Total royalties due to CMCC.

          5.   Names and addresses of all sublicensees of Licensee.

          6.   Payments received by Licensee from Affiliates and sublicensees.

          7.   Licensed Products manufactured and sold to the U.S. Government.
               No royalty obligations shall arise from sales or use by, for or
               on behalf of the U.S. Government in view of a royalty-free,
               nonexclusive license that may heretofore have been granted to the
               U.S. Government.

          8.   Royalties and Fees received from sublicensees.
<PAGE>

     D.   Until the First Commercial Sale of a Licensed Product or Licensed
Process, Licensee shall provide to CMCC at least annually reasonable detail
regarding the activities of Licensee and/ or Licensee's Affiliates and
sublicensees relative to achieving the objectives set forth in the Development
Plan in a timely manner, including but not limited to, reports of financial
expenditures to achieve said objectives, research and development activities,
regulatory approvals, strategic alliances and manufacturing, sublicensing and
marketing efforts.

     E.   With each such report submitted, Licensee shall pay to CMCC the
royalties due and payable under this Agreement.  Prior to first commercial sale,
if no royalties shall be due, Licensee shall not be required to make a report
pursuant to this Article V.

     F.   On or before the ninetieth (90th) day following the close of
Licensee's fiscal year, Licensee shall provide CMCC with Licensee's certified
financial statements for the preceding fiscal year, including at a minimum a
balance sheet and an operating statement or other public report containing
substantially the same information.  CMCC agrees to hold in confidence each
report delivered by Licensee pursuant to this Article V until the termination of
this agreement, except that CMCC may disclose the reports to YISSUM under
agreement of confidentiality.  Notwithstanding the foregoing, the CMCC may
disclose any such information required to be disclosed pursuant to any judicial,
administrative or governmental request, subpoena, requirement or order, provided
that the CMCC take reasonable steps to provide Licensee with the opportunity to
contest such request, subpoena, requirement or order.

                        ARTICLE VI.  PATENT PROSECUTION

     A.   CMCC in cooperation with Licensee shall apply for, seek prompt
issuance of, and maintain during the term of this Agreement the Patent Rights
set forth in Appendix 1 through patent counsel mutually agreeable to both
partners.  The parties agree that Hamilton, Brook, Smith & Reynold is a mutually
acceptable patent counsel as of the date hereof, and that, if Licensee so
requests within three (3) months hereof, Pennie and Edmonds would be mutually
acceptable. The prosecution, filing and maintenance of all Patent Rights
applications and patents shall be the primary responsibility of CMCC.  Licensee
shall have reasonable opportunities to advise CMCC and shall cooperate with CMCC
in the prosecution, filing and maintenance of the Patent Rights.

     B.   Licensee shall reimburse to CMCC the amount of all fees and costs
relating to the filing, prosecution and maintenance of the Patent Rights whether
such fees and/or costs were incurred before or after the date of this Agreement.
CMCC shall provide to Licensee an itemized invoice of all such fees and Licensee
shall pay to CMCC all amounts due under said invoice within thirty (30) days of
the date of said invoice.
<PAGE>

     C.   In the event that CMCC elects not to pursue, maintain or retain a
particular Patent Right licensed to Licensee hereunder, CMCC shall so notify
Licensee within thirty (30) days of such decision so that Licensee may assume
the filing, prosecution and/or maintenance of such application or patent at
Licensee's expense.  In such event, CMCC shall provide to Licensee any
authorization necessary to permit Licensee to pursue and/or maintain such Patent
Right.  Licensee shall have no further royalty obligations under this Agreement
with respect to any such Patent Right.

                          ARTICLE VII.  INFRINGEMENT

     A.   In the event that Licensee shall learn of the infringement of any
patent or right licensed under this Agreement, Licensee shall call CMCC's
attention thereto in writing.  Both parties to this Agreement agree to consult
the other prior to notifying an infringing party, in a jurisdiction where
Licensee then has exclusive rights under this Agreement, of the infringement of
any of CMCC Patent Rights or such other intellectual property rights and shall
not notify such infringing party without first obtaining consent of the other
party, which consent shall not be reasonably withheld.  Both parties shall use
their best efforts in cooperation with each other to terminate such infringement
without litigation.  CMCC shall have the first option to undertake the
enforcement of the CMCC Patent Rights, provided, however, that Licensee may join
with CMCC and its counsel in prosecuting such legal action, provided, however,
that if the use of counsel chosen by CMCC would present such counsel with a
conflict of interest that would disqualify such counsel from joint
representation, then Licensee may obtain counsel of its choice at its sole
expense.

     B.   Licensee may request that CMCC take legal action against the
infringement of the Patent Rights licensed under this Agreement.  Such a request
shall be made in writing and shall include reasonable evidence of such
infringement and damages to Licensee.  If CMCC does not commence a diligent
legal challenge within sixty (60) business days after such request (or
immediately in the event Licensee requests that CMCC seek provisional relief and
reasonably demonstrates that such relief is required), and the infringing
activity has not been abated within such time, or if at any time thereafter CMCC
does not persist in such diligent legal challenge until the infringement has
been abated, Licensee may, if the infringement occurred in a jurisdiction where
Licensee had exclusive rights under this Agreement, may commence or assume
control, as the case may be, over the prosecution of legal actions relating
thereto.  However, in the event Licensee elects to bring suit in accordance with
this paragraph B, CMCC may thereafter join with Licensee and its counsel in
prosecuting such legal action, provided, however that if the use of counsel
chosen by CMCC would present such counsel with a conflict of interest that would
disqualify such counsel from joint representation, then CMCC may obtain counsel
of its choice at its sole expense.

     C.   Recoveries or reimbursements from any such litigation or settlement
within the scope of paragraph B in a jurisdiction in which Licensee had
exclusive rights under this Agreement at the time of the infringement shall be
first applied to reimburse Licensee and/ or CMCC for out-of-pocket litigation
costs (with respect to Licensee, to the extent not theretofore credited against
royalties in accordance with paragraph E)
<PAGE>

and then to CMCC for any royalties past due or withheld pursuant to paragraph E.
Any remaining recoveries or reimbursements shall be divided between Licensee and
CMCC at a rate of 20% to CMCC and 80% to Licensee.

     D.   In the event that a claim or suit is asserted or brought against
Licensee alleging that the manufacture or sale of any Licensed Product by
Licensee or its sublicensees, or the use of such Licensed Product by any
customer of any of the foregoing, infringes proprietary rights of a third party,
Licensee shall give written notice thereof to CMCC.  Licensee may, in its sole
discretion, modify such Licensed Product to avoid such infringement and/or may
settle on terms that it deems advisable in its sole discretion, subject to
paragraph F.  Otherwise, Licensee shall have the right, but not the obligation,
to defend any such claim or suit.  In the event Licensee elects not to defend
such suit, CMCC shall have the right, but not the obligation to do so at its own
sole expense.

     E.   Licensee may credit up to fifty (50) percent of any litigation costs
incurred by Licensee in any country pursuant to paragraph C or D and up to 50%
of all amounts paid in judgment or settlement of litigation within the scope of
paragraph D against royalties thereafter payable to CMCC hereunder for such
country and apply the same toward one-half of its actual, reasonable out-of-
pocket litigation costs.  If one-half of such litigation costs in such country
exceed 50 % of royalties payable to CMCC in any year in which such costs are
incurred than the amount of such costs, expenses and amounts paid in judgment or
settlement, in excess of such 50% of the royalties payable shall be carried over
and credited against royalty payments in future years for such country (subject
to the same annual limits). The credit relating to paragraph D shall apply only
to the extent that litigation costs are incurred in defense or settlement of a
claim that the practice of the Patent Rights involved in the manufacture, use or
sale of Licensed Products infringes the patent rights of a third party.

     F.   Licensee shall not settle or compromise any suit in a manner that
imposes any obligations or restrictions on CMCC or grants any rights to the CMCC
Patent Rights without CMCC's written permission, which permission shall not be
unreasonably withheld.  CMCC shall not settle or compromise any such suit in a
manner that imposes any obligations or restrictions on Licensee without
Licensee's written permission, which permission shall not be reasonably
withheld.

     G.   In any action to enforce any of the CMCC Patent Rights, either party,
at the request and expense of the other party, shall cooperate to the fullest
extent reasonably possible.  This provision shall not be construed to require
either party to undertake any activities, including legal discovery, at the
request of any third party except as may be required by lawful process of a
court of competent jurisdiction.

     H.   Notwithstanding the foregoing, if a third party commences a legal
action in any country in which Licensee has exclusive rights under this
Agreement alleging that the practice of the Patent Rights infringes a third-
party's patent rights, Licensee may withhold, pending final resolution of the
litigation, 50% of the royalties thereafter payable to CMCC from sales made in
that country.  In the event that Licensee recovers
<PAGE>

damages from any such litigation, it shall pay to CMCC the 50% previously
withheld together with interest at an annual rate of 10%.

                         ARTICLE VIII. INDEMNIFICATION
                           AND INSURANCE PROVISIONS

     A.   Licensee shall indemnify, defend and hold harmless CMCC and YISSUM,
their corporate affiliates, current or future directors, trustees, officers,
faculty, medical and professional staff, employees, students and agents and
their respective successors,  heirs and assigns (the "Indemnitees"), against any
liability, damage, loss or expense (including reasonable attorney's 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
arising out of any theory of product liability (including, but not limited to,
actions in the form of tort, warranty, or strict liability) concerning any
product, process or service made, used or sold by Licensee pursuant to any right
or license granted under this Agreement.

     B.   Licensee's indemnification under Article VIII, Paragraph A above shall
not apply to any liability, damage, loss or expense to the extent that it is
directly attributable to the negligent activities, reckless misconduct or
intentional misconduct of the Indemnitees.

     C.   Licensee agrees, at its own expense, to provide attorneys reasonably
acceptable to CMCC to defend against any actions brought or filed against any
party indemnified hereunder with respect to the subject of indemnity contained
herein, whether or not such actions are rightfully brought.

     D.   Beginning at the time as any such product, process or service is being
commercially distributed or sold (other than for the purpose of obtaining
regulatory approvals) by Licensee or by a sublicensee, Affiliate or agent of
Licensee, Licensee shall, at its sole cost and expense, procure and maintain
commercial general liability insurance in amounts not less than $2,000,000 per
incident and $2,000,000 annual aggregate and naming the Indemnitees as
additional insureds.  Such commercial general liability insurance shall provide
(i) product liability coverage and (ii) contractual liability coverage for
Licensee's  indemnification under Article VIII, Paragraphs A through C of this
Agreement.  If Licensee elects to self-insure all or part of the limits
described above (including deductibles or retentions which are in excess of
$250,000 annual aggregate), such self-insurance program must be acceptable to
CMCC and the Risk Management Foundation of the Harvard Medical Institutions,
Inc.  The minimum amount of insurance coverage required under this Article VIII,
Paragraph E. shall not be construed to create a limit of Licensee's liability
with respect to its indemnification under Article VIII, Paragraphs A through C
of this Agreement.

     E.   Licensee shall provide CMCC with written evidence of such insurance
upon request of CMCC.  Licensee shall provide CMCC with written notice at least
fifteen (15) days prior to the cancellation, non-renewal or material change in
such insurance. If Licensee does not obtain replacement insurance providing
comparable coverage within such fifteen (15) day period, CMCC shall have the
right to terminate
<PAGE>

this Agreement effective at the end of such fifteen (15) day period without
notice of any additional waiting periods.

     F.   Licensee shall maintain such commercial general liability insurance
during (i) the period that any such product, process or service is being
commercially distributed or sold (other than for the purpose of obtaining
regulatory approvals) by Licensee or by a sublicensee, Affiliate or agent of
Licensee and (ii) a reasonable period after the period referred to above, which
in no event shall be less than five (5) years.

     G.   Licensee shall continue to indemnify CMCC for any product liability

claims arising out of the use of Licensed Product(s) or Process(es) during the
period in which Licensee is developing, making, commercializing and selling any
Licensed Product(s) or Process(es) and for a period of five (5) years after the
date on which the Company ceases to do so (the "Cessation Date"), solely for
claims arising out of such activities prior to the Cessation Date.

     H.   Article VIII, Paragraphs F. and G. shall survive expiration or
termination of this Agreement.

     I.   OTHER THAN WARRANTIES SET FORTH HEREIN, CMCC MAKES NO WARRANTY,
EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO ANY PATENT, TRADEMARK, SOFTWARE, TRADE SECRET, TANGIBLE RESEARCH
PROPERTY, INFORMATION OR DATA LICENSED OR OTHERWISE PROVIDED TO LICENSEE
HEREUNDER AND HEREBY DISCLAIMS THE SAME.

                         ARTICLE IX.  EXPORT CONTROLS

     It is understood that CMCC is subject to United States laws and regulations
controlling the export of technical data, computer software, laboratory
prototypes and other commodities (including the Arms Export Control Act, as
amended and the Export Administration Act of 1979), and that its obligations
hereunder are contingent on compliance with applicable United States export laws
and regulations.  The transfer of certain technical data and commodities may
require a license from the cognizant agency of the United States Government
and/or written assurances by Licensee that Licensee shall not export data or
commodities to certain foreign countries without prior approval of such agency.
CMCC neither represents that a license shall not be required, nor that if
required, it shall be issued.

                         ARTICLE X.  NON-USE OF NAMES

     Licensee shall not use the name of Children's Medical Center Corporation,
nor YISSUM, nor the name of any of their corporate affiliates or employees, nor
any adaptation thereof, in any advertising, promotional or sales literature
without prior
<PAGE>

written consent obtained from CMCC in each case which consent shall not be
reasonably withheld, except that Licensee may state that it is licensed by CMCC
under one or more of the patents and/or applications comprising the Patent
Rights, and Licensee may comply with disclosure requirements of all applicable
laws relating to its business, including United States and state securities
laws.

                            ARTICLE XI.  ASSIGNMENT

     A.   Except as otherwise provided herein, this Agreement is not assignable
in whole or in part, and any attempt to do so shall be void and of no effect.

     B.   CMCC may assign this Agreement at any time to any corporate affiliate
of CMCC without the prior consent of Licensee.

     C.   Except as provided in Article XI, Paragraph D below, Licensee may
assign this Agreement to another entity only with the prior written consent of
CMCC, which consent shall not be unreasonably withheld or delayed.

     D.   Notwithstanding anything herein to the contrary, in the event Licensee
merges with another entity, is acquired by another entity, or sells all or
substantially all of its assets to another entity, Licensee may assign its
rights and obligations hereunder to, in the event of a merger or acquisition,
the surviving entity, and in the event of a sale, the acquiring entity, without
CMCC's consent, which shall not be unreasonably withheld or delayed, so long as:
(i) Licensee is not then in breach of this Agreement; (ii) the proposed assignee
has a net worth at least equivalent to the net worth Licensee had as of the date
of this Agreement; (iii) the proposed assignee has available resources and
sufficient scientific, business and other expertise comparable to Licensee in
order to satisfy its obligations hereunder; (iv) Licensee provides written
notice of the assignment to CMCC, together with documentation sufficient to
demonstrate the requirements set forth in subparagraphs (i) through (iii) above,
at least thirty (30) days prior to the effective date of the assignment; and (v)
CMCC receives from the assignee, in writing, at least thirty (30) days prior to
the effective date of the assignment: (a) an agreement to be bound by the terms
of this Agreement; and (b) an agreement to perform the obligations of Licensee
under this Agreement.

               ARTICLE XII.  DISPUTE RESOLUTION AND ARBITRATION

     A.   Except for the right of either party to apply to a court of competent
jurisdiction for a temporary restraining order, a preliminary injunction, or
other equitable relief to preserve the status quo or prevent irreparable harm,
any and all claims, disputes or controversies arising under, out of, or in
connection with the Agreement, including any dispute relating to patent validity
or infringement, which the parties shall be unable to resolve within sixty (60)
days shall be mediated in good faith.  The party raising such dispute shall
promptly advise the other of such claim, dispute or controversy in writing,
describing the dispute in reasonable detail.  By no later than five (5) business
days after the recipient has received such notice of dispute, each party
<PAGE>

shall have selected a representative who shall have the authority to bind such
party and shall have advised the other party in writing of the name and title of
such representative.

     B.   In the event that a dispute arises between the parties hereto, then
the parties agree to use their best efforts to resolve the dispute amicably.  In
the event that the parties have not resolved the dispute within sixty (60) days,
then the parties agree to submit to binding arbitration in accordance with this
Article XII.

     C.   Any and all claims, disputes or controversies arising under, out of,
or in connection with this Agreement, which have not been resolved by good faith
negotiations between the parties or by mediation shall be resolved by final and
binding arbitration in Boston, Massachusetts, in accordance with the rules of
the American Arbitration Association ("AAA") then obtaining and all expenses, in
connection therewith, will be shared equally, except for the expense of the
parties' respective legal counsels.  A single arbitrator shall be mutually
agreed upon and if the parties are unable to agree on a mutually acceptable
arbitrator, an arbitrator shall be chosen in accordance with AAA rules. Any
award rendered in such arbitration shall be final and may be enforced by either
party.

     D.   Notwithstanding the foregoing, nothing in this Article shall be
construed to waive any rights or timely performance of any obligations existing
under this Agreement.

                      ARTICLE XIII.  TERM AND TERMINATION

     A.   The term of this Agreement shall be not less than fifteen (15) years
or the life of the last expiring Patent Right, whichever period is the longer
term.

     B.   CMCC may terminate this Agreement immediately upon the bankruptcy,
insolvency, liquidation, dissolution or cessation of operations of Licensee; or
the filing of any voluntary petition for bankruptcy, dissolution, liquidation or
winding-up of the affairs of Licensee; or any assignment by Licensee for the
benefit of creditors; or the filing of any involuntary petition for bankruptcy,
dissolution, liquidation or winding-up of the affairs of Licensee which is not
dismissed within ninety (90) days of the date on which it is filed or commenced.

     C.   CMCC may terminate this Agreement upon forty-five(45) days prior
written notice in the event of Licensee's failure to pay to CMCC royalties due
and payable hereunder in a timely manner, unless Licensee shall make all such
payments to CMCC within said forty-five (45) day period.  Upon the expiration of
the thirty (30) day period, if Licensee shall not have made all such payments to
CMCC, the rights, privileges and licenses granted hereunder shall terminate.

     D.   Except as otherwise provided in Paragraph C above, CMCC may terminate
this Agreement upon sixty (60) days prior written notice in the event of
Licensee's breach or default of any material term or condition or warranty
contained in
<PAGE>

this Agreement, unless Licensee shall cure such breach to CMCC's reasonable
satisfaction within said sixty (60) day period. Upon the expiration of the sixty
(60) day period, if Licensee shall not have cured said breach to the reasonable
satisfaction of CMCC, the rights, privileges and license granted hereunder shall
terminate.

     E.   Licensee shall have the right to terminate this Agreement at any time
upon ninety (90) days prior written notice to CMCC, and upon payment by Licensee
of all amounts due CMCC through the effective date of termination.

     F.   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 any sublicensee
thereof may, however, after the effective date of such termination, sell all
Licensed Products and complete Licensed Products in the process of manufacture
at the time of such termination and sell the same, provided that Licensee shall
pay to CMCC the royalties thereon as required under this Agreement and shall
submit the reports required under this Agreement on the sales of Licensed
Products.

     G.   Upon termination of this Agreement for any reason, all rights and
licenses shall revert to CMCC and/or YISSUM, as appropriate.  Licensee shall
return, and/or transfer, to CMCC and/or YISSUM, as appropriate, within 14 days
of termination, all the rights and/or material relating to Licensed Products or
Licensed Processes, and any and all data, inventions, know-how, and patent
rights developed under the Sponsored Research Agreement, and Licensee may not
make any further use thereof, nor shall Licensee be entitled to any
reimbursement of any amount paid to CMCC or YISSUM under this Agreement or the
Sponsored Research Agreement.  Licensee shall also provide to CMCC exclusive
rights to any related tangible or intangible property and developed solely by
Licensee in the course of commercializing Licensed Products or Licensed Products
(including, but not limited to manufacturing know-how, test data, product
samples, patent filings, regulatory filings, and clinical data) under an
agreement through which CMCC would, from proceeds (if any) derived from
subsequent commercialization of the Patent Rights and/or Licensed Products
and/or Licensed Products, reimburse Licensee for its reasonable costs in
developing said tangible and intangible assets.

     H.   Upon termination of this Agreement by CMCC, CMCC shall, and shall
cause YISSUM to, refrain from selling any then unsold shares of common stock or
exercising any then unexercised warrants then owned or possessed by either
party, and shall return, and cause YISSUM to return, any such shares and/or
warrants to Licensee within fourteen (14) days of such termination.

           ARTICLE XIV.  PAYMENTS, NOTICES, AND OTHER COMMUNICATIONS

     A.   All payments, notices, reports and/or other communications made in
accordance with this Agreement, shall be sufficiently made or given on the date
of the mailing if delivered by hand, by facsimile or sent by first class mail
postage prepaid and addressed as follows:

<PAGE>

In the case of CMCC:

          Director, Technology Transfer
          Office of Research Administration
          Children's Hospital
          300 Longwood Avenue
          Boston, MA  02115
          Telefax 617 232-7485

     In the case of Licensee:

          General Counsel
          Lakaro Biopharmaceuticals
          216 Jaffa Road
          Jerusalem 94383 Israel
          Telefax: 972-2-537-5098

                        ARTICLE XV.  GENERAL PROVISIONS

     A.   All rights and remedies hereunder will be cumulative and not
alternative, and this Agreement shall be construed and governed by the laws of
the Commonwealth of Massachusetts.

     B.   This Agreement may be amended only by written agreement signed by the
parties.

     C.   It is expressly agreed by the parties hereto that CMCC and Licensee
are independent contractors and nothing in this Agreement is intended to create
an employer relationship, joint venture, or partnership between the parties.  No
party has the authority to bind the other.

     D.   This Agreement constitutes the entire agreement between the parties
with respect to the subject matter hereof and supersedes all proposals,
negotiations and other communications between the parties, whether written or
oral, with respect to the subject matter hereof.

     E.   If any provisions of this Agreement shall be held to be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions of this Agreement shall not be impaired thereby.

     F.   This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original as against the party whose signature appears
thereon, but all of which taken together shall constitute but one and the same
instrument.
<PAGE>

     G.   The failure of either party to assert a right to which it is entitled
or to insist upon compliance with any term or condition of this Agreement shall
not constitute a waiver of that right or excuse a similar subsequent failure to
perform any such term or condition by the other party.

     H.   Licensee agrees to mark any Licensed Products sold in the United
States with all applicable United States patent numbers.  All Licensed Products
shipped to or sold in other countries shall be marked in such a manner as to
conform with the patent laws and practices of the country of manufacture or
sale.

     I.   Each party hereto agrees to execute, acknowledge and deliver such
further instruments and do all such further acts as may be necessary or
appropriate to carry out the purposes and intent of this Agreement.

     J.   The paragraph headings contained in this Agreement are for reference
purposes only and shall not in any way affect the meaning or interpretation of
this Agreement.

     K.   Each party hereto shall be excused from any breach of this Agreement
which is proximately caused by governmental regulation, act of war, strike, act
of God or other similar circumstance normally deemed outside the control of the
parties.

     L.   This Agreement will not be binding upon the parties until it has been
signed below on behalf of each party, in which event it shall be effective as of
the date recited on page one.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
last written below.

CHILDREN'S MEDICAL CENTER CORPORATION           LRK BIOPHARMACEUTICALS, INC.

By:  /s/  William New                           By:  /s/  Benjamin Corn
   ____________________________                    _____________________________
Name:  William New                              Name:  Benjamin Corn
     __________________________                      ___________________________

            Vice President
Title:  Research Administration                 Title:  President
      _________________________                       __________________________
Date:                                           Date:   11/18/99
     __________________________                      ___________________________

<PAGE>

                                  Appendix 1
                                 Patent Rights

CMCC 547 "Short peptides which selectively modulate the activity of protein
tyrosine kinases"  by Dr. Shmuel Ben-Sasson

CMCC 590 "Short Peptides which selectively modulate the activity of
serine/threonine kinases", by Dr. Shmuel Ben-Sasson

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