EXHIBIT 6

CONFIDENTIAL PORTIONS OF THIS EXHIBIT HAVE BEEN OMITTED PURSUANT TO REGULATION
240.25B-2B OF THE SECURITIES EXCHANGE ACT OF 1934. [*] INDICATES OMITTED
MATERIAL THAT IS THE SUBJECT OF A CONFIDENTIAL TREATMENT REQUEST AND IS FILED
SEPARATELY WITH THE COMMISSION.

                                                                Execution Copy 2



            SUBSCRIPTION, JOINT DEVELOPMENT AND OPERATING AGREEMENT



                             ELAN CORPORATION, PLC
        (acting through its division Elan Pharmaceutical Technologies)

                                      AND

                       ELAN INTERNATIONAL SERVICES, LTD.

                                      AND

                       ELAN PHARMA INTERNATIONAL LIMITED

                                      AND

                        RIBOZYME PHARMACEUTICALS, INC.

                                      AND

                         MEDIZYME PHARMACEUTICALS LTD.


                                     INDEX
                                     -----


CLAUSE 1       DEFINITIONS

CLAUSE 2       BUSINESS

CLAUSE 3       REPRESENTATIONS AND WARRANTIES

CLAUSE 4       AUTHORIZATION AND CLOSING

CLAUSE 5       DIRECTORS; MANAGEMENT AND R&D COMMITTEES

CLAUSE 6       THE BUSINESS PLAN AND REVIEWS

CLAUSE 7       RESEARCH AND DEVELOPMENT WORK

CLAUSE 8       COMMERCIALIZATION

CLAUSE 9       SUBLICENSE AND ASSIGNMENT RIGHTS

CLAUSE 10      OWNERSHIP OF INTELLECTUAL PROPERTY RIGHTS/NONCOMPETITION

CLAUSE 11      INTELLECTUAL PROPERTY RIGHTS

CLAUSE 12      CROSS LICENSING/EXPLOITATION OF PRODUCTS OUTSIDE THE FIELD

CLAUSE 13      REGULATORY

CLAUSE 14      MANUFACTURING

CLAUSE 15      TECHNICAL SERVICES AND ASSISTANCE

CLAUSE 16      AUDITORS, BANKERS, REGISTERED OFFICE,
               ACCOUNTING REFERENCE DATE; SECRETARY

CLAUSE 17      TRANSFER OF SHARES; RIGHTS OF FIRST OFFER; TAG ALONG RIGHTS

CLAUSE 18      MATTERS REQUIRING PARTICIPANTS' APPROVAL


CLAUSE 19      DISPUTES

CLAUSE 20      TERMINATION

CLAUSE 21      SHARE RIGHTS

CLAUSE 22      CONFIDENTIALITY

CLAUSE 23      COSTS

CLAUSE 24      GENERAL


THIS SUBSCRIPTION, JOINT DEVELOPMENT AND OPERATING AGREEMENT made this __ day of
January, 2000

BETWEEN:

(1)  ELAN CORPORATION, PLC, a public limited company incorporated under the laws
     of Ireland, acting through its division Elan Pharmaceutical Technologies
     and having its registered office at Lincoln House, Lincoln Place, Dublin 2,
     Ireland ("Elan, plc");

(2)  ELAN INTERNATIONAL SERVICES, LTD., a Bermuda exempted limited liability
     company incorporated under the laws of Bermuda, and having its registered
     office at Clarendon House, Church St., Hamilton, Bermuda ("EIS");

(3)  ELAN PHARMA INTERNATIONAL LIMITED a private limited company incorporated
     under the laws of Ireland, and having its registered office at WIL House,
     Shannon Business Park, Shannon, County Clare, Ireland ("EPIL");

(4)  RIBOZYME PHARMACEUTICALS, INC. a corporation duly incorporated and validly
     existing under the laws of Delaware and having its principal place of
     business at 2950 Wilderness Place, Boulder, Colorado 80301 ("RPI"); and

(5)  MEDIZYME PHARMACEUTICALS LTD., a Bermuda exempted limited liability company
     incorporated under the laws of Bermuda, and having its registered office at
     Clarendon House, 2 Church St., Hamilton, Bermuda ("Newco").

                                   RECITALS:

A.   Newco desires to issue and sell to the Shareholders (as defined below), and
     the Shareholders desire to purchase from Newco, for aggregate consideration
     of $15,000,000, apportioned between them as set forth herein, (i) 6,000
     shares of Newco's common shares, par value $1.00 per share (the "Common
     Shares") to RPI, and (ii) 6,000 shares of Newco's preferred shares, par
     value $1.00 per share (the "Preferred Shares") allocated 3,612 shares to
     RPI and 2,388 shares to EIS.

B.   As of the date hereof, Elan, plc and EPIL have entered into a license
     agreement with Newco, and RPI has entered into a license agreement with
     Newco, in connection with the license to Newco of the Elan Intellectual
     Property and the RPI Intellectual Property, respectively (each as defined
     below).

C.   Elan, plc, EPIL and RPI have agreed to co-operate in the research,
     development and commercialization of the Products (as defined below) based
     on their respective technologies.


D.   Elan, plc, EPIL and RPI have agreed to enter into this Agreement for the
     purpose of recording the terms and conditions regulating their relationship
     with each other, with respect to the Licensed Technologies and with Newco.


NOW IT IS HEREBY AGREED AS FOLLOWS:

                                   CLAUSE 1

                                  DEFINITIONS

1.1  In this Agreement, the following terms shall, where not inconsistent with
     the context, have the following meanings respectively.

     "Affiliate" of any Person (in the case of a legal entity) shall mean any
     other Person controlling, controlled or under the common control of such
     first Person, as the case may be. For the purposes of this definition,
     "control" shall mean direct or indirect ownership of fifty percent (50%) or
     more of the stock or shares entitled to vote for the election of directors
     and "controlling" and "controlled" shall be construed accordingly. For
     purposes of this Agreement, Newco is not an Affiliate of Elan or EIS.

     "Agreement" shall mean this agreement (which expression shall be deemed to
     include the Recitals and the Schedules hereto).

     Angiozyme(TM) shall mean a Ribozyme targeted against vascular endothelial
     growth factor receptor (VEGF-R).

     "Board" shall mean the board of directors of Newco.

     "Business" shall mean the business specified in the Business Plan.

     "Business Plan" has the meaning set forth in Clause 6 below.

     "Certificate of Designations" shall mean that certain certificate of
     designations, preferences and rights of Series A Preferred Stock and Series
     B Preferred Stock of RPI issued on the date hereof.

     "Closing Date" shall mean the date upon which the Substantive Documents are
     executed and delivered by the Parties and the transactions effected thereby
     are closed.

     "Common Share Equivalents" shall mean any options, warrants, rights or any
     other securities convertible, exercisable or exchangeable, in whole or in
     part, for or into Common Shares.

     "Convertible Note" shall mean that certain Convertible Promissory Note, of
     even date herewith, by and between RPI and EIS.

                                       5


     "Directors" shall mean, at any time, the directors of Newco.

     "EIS Director" has the meaning set forth in Clause 5.

     "Elan" shall mean Elan, plc and EPIL.

     "Elan Improvements" has the meaning assigned thereto in the Elan License
     Agreement.

     "Elan Intellectual Property" has the meaning assigned thereto in the Elan
     License Agreement.

     "Elan Know-How" has the meaning assigned thereto in the Elan License
     Agreement.

     "Elan License" has the meaning assigned thereto in the Elan License
     Agreement.

     "Elan License Agreement" shall mean the license agreement between Elan and
     Newco, of even date herewith, attached hereto in Schedule 1.

     "Elan Patents" has the meaning assigned thereto in the Elan License
     Agreement.

     "Elan Research License" has the meaning assigned thereto in the Elan
     License Agreement.

     "Encumbrance" shall mean any liens, charges, encumbrances, equities,
     claims, options, proxies, pledges, security interests, or other similar
     rights of any nature.

     "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

     "Exchange Right" has the meaning assigned to such term in the RPI
     Securities Purchase Agreement in effect on the date hereof.

     "Field" shall mean the [ * ] of the Target Ribozyme using the System for
     the down regulation of HER-2.

     "Financial Year" shall mean each year commencing on January 1 (or in the
     case of the first Financial Year, the date hereof) and expiring on December
     31 of each year.

     "Fully Diluted Common Shares" shall mean all of the issued and outstanding
     Common Shares, assuming the conversion, exercise or exchange of all
     outstanding Common Share Equivalents.

     "Funding Agreement" shall mean the Funding Agreement, of even date
     herewith, between EIS, RPI, and Elan.

     "HER-2" shall mean Human Epidermal Growth Factor Receptor Type 2.

                                       6


     "License Agreements" shall mean the Elan License Agreement and the RPI
     License Agreement.

     "Licensed Technologies" shall mean, collectively, the Elan Intellectual
     Property and the RPI Intellectual Property.

     "Licenses" shall mean the Elan License, the Elan Research License and RPI
     License.

     "Management Committee" shall have the meaning set forth in Clause 5.2
     hereof.

     "Newco Intellectual Property" shall mean Newco Patents and Newco Know How.

     "Newco Know-How" shall mean any and all rights owned, licensed or
     controlled by Newco to any scientific, pharmaceutical or technical
     information, data, discovery, invention (whether patentable or not),
     technique, process, procedure, system, formulation or design that is not
     generally known to the public arising out of the conduct of the Project by
     any person that does not constitute Elan Improvements or RPI Improvements.

     "Newco Patents" shall mean any and all patents and patent applications
     arising out of the conduct of the Project by any person that does not
     constitute Elan Improvements or RPI Improvements and all rights therein,
     and including all extensions, continuations, continuations-in-part,
     divisionals, patents-of-additions, re-examinations, re-issues,
     supplementary protection certificates and foreign counterparts thereto
     owned or licensed to Newco.

     "Newco Memorandum of Association and Bye-Laws" shall mean the Memorandum of
     Association and Bye-Laws of Newco Limited.

     "Oligonucleotide" shall mean a [ * ] non-protein, non-peptide encoding
     nucleic acid molecule including those with [ * ] used as a human
     therapeutic and/or prophylactic compound comprising between [ * ] including
     oligonucleotide analogs which may include natural or non-natural
     heterocycles, sugars and/or backbone linkage modifications, capable of
     specifically inhibiting the function, activity or expression of a gene. For
     the purposes hereof Oligonucleotide (a) shall include [ * ]
     oligonucleotides, and (b) shall exclude polymers in which the linkages are
     [ * ] but shall not exclude [ * ]

     "Participant" shall mean RPI or Elan, as the case may be, and
     "Participants" shall mean both of the Participants together.

     "Party" shall mean Elan, plc, EPIL, RPI, or Newco, as the case may be, and
     "Parties" shall mean all four together;

     "Person" shall mean an individual, partnership, corporation, limited
     liability company, business trust, joint stock company, trust,
     unincorporated association, joint venture, governmental entity or authority
     or other entity of whatever nature.

                                       7


     "Permitted Transferee" shall mean any Affiliate or subsidiary of Elan, EIS
     or RPI, to whom this Agreement may be assigned, in whole or in part,
     pursuant to the terms hereof or in the case of Elan and EIS, a special
     purpose financing entity created by Elan or EIS or their respective
     affiliates.

     "Product(s)" shall mean the pharmaceutical formulation incorporating the
     Target Ribozyme and incorporated within or packaged with the System.

     "Project" shall mean all activity as undertaken by or on behalf of Newco in
     order to develop the Products in accordance with the Business Plan.

     "Registration Rights Agreements" shall mean the Registration Rights
     Agreements of even date herewith relating to Newco and RPI, respectively.

     "R&D Committee" shall have the meaning set forth in Clause 5.2 hereof.

     "Regulatory Approval" shall mean the final approval to market a Product in
     any country of the Territory, and any other approval which is required to
     launch the Product in the normal course of business.

     "Research and Development Term" shall mean the research and development
     stage of the Business Plan, which stage shall be deemed terminated upon the
     first commercial launch of a Product by Newco.

     "RHA" shall mean any relevant government health authority (or successor
     agency thereof) in any country of the Territory whose approval is necessary
     to market a Product in the relevant country of the Territory.

     "Ribozyme" shall mean an [ * ] directed to inhibit, by catalytic cleavage,
     the translation of mRNA coding for a gene. For the avoidance of doubt,
     Ribozyme does not include a gene that encodes a [ * ].

     "RPI Directors" has the meaning set forth in Clause 5 hereof.

     "RPI Improvements" has the meaning assigned thereto in the RPI License
     Agreement.

     "RPI Intellectual Property" has the meaning assigned thereto in the RPI
     License Agreement.

     "RPI Know-How" has the meaning assigned thereto in the RPI License
     Agreement.

     "RPI License" has the meaning assigned thereto in the RPI License
     Agreement.

     "RPI License Agreement" shall mean the license agreement between RPI and
     Newco, of even date herewith, attached hereto in Schedule 2.

                                       8


     "RPI Patent Rights" has the meaning assigned thereto in the RPI License
     Agreement.

     "RPI Securities Purchase Agreement" shall mean that certain securities
     purchase agreement, of even date herewith, by and between RPI and EIS.

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Shares" shall mean the shares of Common Shares and shares of Preferred
     Shares of Newco.

     "Shareholder" shall mean any of EIS, RPI, any Permitted Transferee or any
     other Person who subsequently becomes bound by this Agreement as a holder
     of the Shares, and "Shareholders" shall mean all of the Shareholders
     together.

     "Substantive Documents" shall mean this Agreement, the Funding Agreement,
     the Elan License Agreement, the RPI License Agreement, the Convertible
     Note, the RPI Securities Purchase Agreement, the Registration Rights
     Agreements, the Certificate of Designations and associated documentation of
     even date herewith, by and between RPI, Elan, EIS and Newco, as applicable.

     "Substitute Ribozyme" shall have the meaning set forth in Clause 2.2
     hereof.

     "Substitute Target" shall have the meaning set forth in Clause 2.2 hereof.

     "System" shall mean the ambulatory drug delivery system for direct
     attachment to the body of a patient having a flexible diaphragm drug
     reservoir, which is capable of delivering factory pre-programmed continuous
     amounts of drug upon activation as disclosed and described in the Elan
     Patents set forth in Schedule 1 of the Elan License Agreement.

     "Target Ribozyme" shall mean a Ribozyme directed to HER-2 unless and until
     a [ * ] directed to a [ * ] is designated to be the subject of the Project
     pursuant to the designation of a [ * ] and [ * ] under the provisions of
     Clause 2.2 hereof, in which case the term [ * ]shall mean such designated
     [ * ] directed to the [ * ]

     "Technological Competitor of Elan" has the meaning assigned thereto in the
     Elan License Agreement.

     "Term" shall mean the term of this Agreement.

     "Territory" shall mean all of the countries of the world.

     "United States Dollar" and "US$" and "$" shall mean the lawful currency of
     the United States of America.

                                       9


1.2  In addition, the following definitions have the meanings in the Clauses
     corresponding thereto, as set forth below.

Definition                            Clause

"AAA"                                 19.3
"Buyout Option"                       20.4
"Closing"                             4.3
"Common Shares"                       Recital
"Confidential Information"            22.1
"Co-sale Notice"                      17.4
"Expert"                              19.3
"Notice of Exercise"                  17.3
"Notice of Intention"                 17.3
"Offered Shares"                      17.3
"Offering Price"                      17.3
"Preferred Shares"                    Recital
"Proposing Participant"               20.4
"Proposing Participant Price:         20.6
"Purchase Price"                      20.6
"R&D Committee"                       5.2.2
"Recipient Participant Price"         20.6
"Remaining Shareholders"              17.4
"Relevant Event"                      20.2
"Selling Shareholder"                 17.3
"Tag-Along Right"                     17.4
"Transaction Proposal"                17.3
"Transfer"                            17.1
"Transferee Terms"                    17.4
"Transferring Shareholder"            17.4

1.3  Words importing the singular shall include the plural and vice versa.

1.4  Unless the context otherwise requires, reference to a recital, article,
     paragraph, provision, clause or schedule is to a recital, article,
     paragraph, provision, clause or schedule of or to this Agreement.

1.5  Reference to a statute or statutory provision includes a reference to it as
     from time to time amended, extended or re-enacted.

1.6  The headings in this Agreement are inserted for convenience only and do not
     affect its construction.

1.7  Unless the context or subject otherwise requires, references to words in
     one gender include references to the other genders.

                                       10


1.8  Capitalized terms used but not defined herein shall have the meanings
     ascribed in the Substantive Documents, if defined therein.


                                   CLAUSE 2

                                   BUSINESS

2.1  The primary objective of the Agreement is to regulate the business of the
     development, testing, registration, manufacture, commercialization and
     licensing of Products for use in the Field in the Territory and to achieve
     the other objectives set out in this Agreement. The focus of the Business
     will be to develop the Products using the Elan Intellectual Property, the
     RPI Intellectual Property and the Newco Intellectual Property in accordance
     with the Business Plan.

2.2. Should the Target Ribozyme [ * ] in accordance with the Business Plan, the
     Parties shall promptly review in good faith [ * ], for the treatment of an
     indication(s) to be determined in good faith by the Parties (the
     "Substitute Target"). In either case, the Parties shall promptly negotiate
     in good faith such amendments as are required to the License Agreements and
     to this Agreement, such as amending the provisions regulating non-
     competition, and to the research and development budgeted costs for the
     Project.

2.3  The central management and control of Newco shall be exercised in Bermuda
     and shall be vested in the Directors and such Persons as they may delegate
     the exercise of their powers in accordance with the Newco Memorandum of
     Association and Bye-Laws. Subject to Clause 9.2 below, the Participants
     shall use their best endeavors to ensure that to the extent required
     pursuant to the laws of Bermuda, and to ensure the sole residence of Newco
     in Bermuda, all meetings of the Directors are held in Bermuda or other
     jurisdictions outside the United States and generally to ensure that Newco
     is treated as resident for taxation purposes in Bermuda.


                                   CLAUSE 3

                        REPRESENTATIONS AND WARRANTIES

3.1  Representations and Warranties of Newco: Newco hereby represents and
     ---------------------------------------
     warrants to each of the Shareholders as follows, as of the date hereof:

     3.1.1  Organization:  Newco is an exempted company duly organized, validly
            -------------
            existing and in good standing under the laws of Bermuda, and has all
            the requisite corporate power and authority to own and lease its
            properties, to carry on its business as presently conducted and as
            proposed to be conducted.

                                       11


     3.1.2  Capitalization:  As of the date hereof, the authorized capital
            ---------------
            stock of Newco consists of 6,000 shares of Common Shares and 6,000
            shares of Preferred Shares. Prior to the date hereof, no shares of
            capital stock of Newco have been issued.

     3.1.3  Authorization:  The execution, delivery and performance by Newco
            --------------
            of this Agreement, including the issuance of the Shares, have been
            duly authorized by all requisite corporate actions; this Agreement
            has been duly executed and delivered by Newco and is the valid and
            binding obligation of Newco, enforceable against it in accordance
            with its terms except as limited by applicable bankruptcy,
            insolvency, reorganization, moratorium and other laws of general
            application affecting the enforcement of creditors' rights
            generally, and except as enforcement of rights to indemnity and
            contribution hereunder may be limited by United States federal or
            state securities laws or principles of public policy. The Shares,
            when issued as contemplated hereby, will be validly issued and
            outstanding, fully paid and non-assessable and not subject to
            preemptive or any other similar rights of the Shareholders or
            others.

     3.1.4  No Conflicts:  The execution, delivery and performance by Newco of
            ------------
            this Agreement, the issuance, sale and delivery of the Shares, and
            compliance with the provisions hereof by Newco, will not:

            (i)    violate any provision of applicable law, statute, rule or
                   regulation applicable to Newco or any ruling, writ,
                   injunction, order, judgment or decree of any court,
                   arbitrator, administrative agency or other governmental body
                   applicable to Newco or any of its properties or assets;

            (ii)   conflict with or result in any breach of any of the terms,
                   conditions or provisions of, or constitute (with notice or
                   lapse of time or both) a default (or give rise to any right
                   of termination, cancellation or acceleration) under its
                   charter or organizational documents or any material contract
                   to which Newco is a party, except where such violation,
                   conflict or breach would not, individually or in the
                   aggregate, have a material adverse effect on Newco; or

            (iii)  result in the creation of any Encumbrance upon any of the
                   properties or assets of Newco.

     3.1.5  Approvals:  As of the date hereof, no permit, authorization,
            ---------
            consent or approval of or by, or any notification of or filing with,
            any Person is required in connection with the execution, delivery or
            performance of this Agreement by Newco. Newco has full authority to
            conduct its business as contemplated in the Business Plan and the
            Substantive Documents.

     3.1.6  Disclosure:  This Agreement does not contain any untrue statement
            -----------
            of a material fact or omit to state any material fact necessary to
            make the statements contained herein not misleading. Newco is not
            aware of any material contingency, event or circumstance relating to
            its business or prospects, which could have a material

                                       12


            adverse effect thereon, in order for the disclosure herein relating
            to Newco not to be misleading in any material respect.

     3.1.7  No Business; No Liabilities: Newco has not conducted any business or
            ----------------------------
            incurred any liabilities or obligations prior to the date hereof,
            except solely in connection with its organization and formation.

3.2  Representations and Warranties of the Shareholders:  Each of the
     ---------------------------------------------------
     Shareholders hereby severally represents and warrants to Newco as follows
     as of the date hereof:

     3.2.1  Organization:  Such Shareholder is a corporation duly organized and
            ------------
            validly existing under the laws of its jurisdiction of organization
            and has all the requisite corporate power and authority to own and
            lease its respective properties, to carry on its respective business
            as presently conducted and as proposed to be conducted and to carry
            out the transactions contemplated hereby.

     3.2.2  Authority:  Such Shareholder has full legal right, power and
            ----------
            authority to enter into this Agreement and to perform its
            obligations hereunder, which have been duly authorized by all
            requisite corporate action. This Agreement is the valid and binding
            obligation of such Shareholder, enforceable against it in accordance
            with its terms except as limited by applicable bankruptcy,
            insolvency, reorganization, moratorium and other laws of general
            application affecting the enforcement of creditors' rights
            generally, and except as enforcement of rights to indemnity and
            contribution hereunder may be limited by United States federal or
            state securities laws or principles of public policy.

     3.2.3  No Conflicts:  The execution, delivery and performance by such
            ------------
            Shareholder of this Agreement, purchase of the Shares, and
            compliance with the provisions hereof by such Shareholder will not:

            (i)     violate any provision of applicable law, statute, rule or
                    regulation known by and applicable to such Shareholder or
                    any ruling, writ, injunction, order, judgment or decree of
                    any court, arbitrator, administrative agency or other
                    governmental body applicable to such Shareholder or any of
                    its properties or assets;

            (ii)    conflict with or result in any breach of any of the terms,
                    conditions or provisions of, or constitute (with notice or
                    lapse of time or both) a default (or give rise to any right
                    of termination, cancellation or acceleration) under the
                    charter or organizational documents of such Shareholder or
                    any material contract to which such Shareholder is a party,
                    except where such violation, conflict or breach would not,
                    individually or in the aggregate, have a material adverse
                    effect on such Shareholder; or

             (iii)  result in the creation of any Encumbrance upon any of the
                    properties or assets of such Shareholder.

                                       13


            3.2.4   Approvals:  As of the date hereof, no permit,
                    ----------
                    authorization, consent or approval of or by, or any
                    notification of or filing with, any Person is required in
                    connection with the execution, delivery or performance of
                    this Agreement by such Shareholder.

            3.2.5   Investment Representations:  Such Shareholder is
                    --------------------------
                    sophisticated in transactions of this type and capable of
                    evaluating the merits and risks of its investment in Newco.
                    Such Shareholder has not been formed solely for the purpose
                    of making this investment and such Shareholder is acquiring
                    the Common Shares and Preferred Shares for investment for
                    its own account, not as a nominee or agent, and not with the
                    view to, or for resale in connection with, any distribution
                    of any part thereof. Such Shareholder understands that the
                    Shares have not been registered under the Securities Act or
                    applicable state and foreign securities laws by reason of a
                    specific exemption from the registration provisions of the
                    Securities Act and applicable state and foreign securities
                    laws, the availability of which depends upon, among other
                    things, the bona fide nature of the investment intent and
                    the accuracy of such Shareholders' representations as
                    expressed herein. Such Shareholder understands that no
                    public market now exists for any of the Shares and that
                    there is no assurance that a public market will ever exist
                    for such Shares.


                                   CLAUSE 4

                           AUTHORIZATION AND CLOSING

     4.1  Newco has authorized the issuance to (i) EIS of 2,388 shares of
          Preferred Shares, and (ii) RPI of 6,000 shares of Common Shares and
          3,612 shares of Preferred Shares, issuable as provided in Clause 4.4
          hereof

     4.2  RPI and EIS hereby subscribe for the number of Shares set forth in
          Clause 4.1 and shall pay to Newco in consideration therefor, by wire
          transfer of immediately available funds (to a bank account established
          by Newco in connection with he Closing) the subscription amounts each
          as provided in Clause 4.4.1.

     4.3  The closing (the "Closing") shall take place at the offices of Brock
          Silverstein LLC at 800 Third Avenue, New York, New York 10022 on the
          date hereof or such other places if any, as the Parties may agree and
          shall occur contemporaneously with the closing under the RPI
          Securities Purchase Agreement.

     4.4  At the Closing, each of the Shareholders shall take or (to the extent
          within its powers) cause to be taken the following steps at directors
          and shareholder meetings of Newco, or such other meetings or
          locations, as appropriate:

          4.4.1  Newco shall issue and sell to EIS, and EIS shall purchase from
          Newco, upon the

                                       14


               terms and subject to the conditions set forth herein, 2,388
               shares of Preferred Shares for an aggregate purchase price of
               $2,985,000.00. Newco shall issue and sell to RPI, and RPI shall
               purchase from Newco, upon the terms and conditions set forth
               herein, 6,000 shares of Common Shares for an aggregate purchase
               price of $7,500,000.00 and 3,612 shares of Preferred Shares for
               an aggregate purchase price of $4,515,000.00. The total aggregate
               purchase price for all Shares is $15,000,000.00.

     4.4.2     the Parties shall execute and deliver to each other, as
               applicable, certificates in respect of the Common Shares and
               Preferred Shares described above and any other certificates,
               resolutions or documents which the Parties shall reasonably
               require;

     4.4.3.    the adoption by Newco of Newco Memorandum of Association and Bye-
               Laws;

     4.4.4.    the appointment of Kevin Insley, Kevin Butler, David Astwood,
               Alene A. Holzman, and Ralph E. Christoffersen as Directors of
               Newco;

     4.4.5.    the resignation of all directors and the secretary of Newco
               holding office prior to the execution of this Agreement and
               delivery of written confirmation under seal by each Person so
               resigning that he has no claim or right of action against Newco
               and that Newco is not in any way obligated or indebted to him;
               and

     4.4.6.    the transfer to Newco of the share register.

4.5  Exemption from Registration:
     ----------------------------

     The Shares will be issued under an exemption or exemptions from
     registration under the Securities Act.  Accordingly, the certificates
     evidencing the Shares shall, upon issuance, contain the following legend:

     THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER
     THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR
     ANY SECURITIES LAWS OF A STATE OR OTHER JURISDICTION AND MAY NOT
     UNDER ANY CIRCUMSTANCES BE SOLD, TRANSFERRED, OR OTHERWISE
     DISPOSED OF (OTHER THAN TO AN AFFILIATE OF THE ORIGINAL HOLDER OR
     AS OTHERWISE PERMITTED IN THE AGREEMENT PURSUANT TO WHICH THEY
     WERE ISSUED) EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION
     STATEMENT UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE
     SECURITIES OR BLUE SKY LAWS, OR (ii) TO THE EXTENT APPLICABLE,
     RULE 144 UNDER THE SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE
     SECURITIES ACT RELATING TO THE DISPOSITION OF SECURITIES)
     TOGETHER WITH AN
                                       15


     OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION
     THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT OR APPLICABLE
     STATE SECURITIES LAWS.

4.6. EIS and RPI shall use reasonable efforts to file any documents that require
     filing with the Registrar of Companies in Bermuda within the prescribed
     time limits.

4.7. In the event that EIS exercises the Exchange Right, Newco shall,
     immediately upon such exercise, take all necessary steps to ensure that EIS
     is duly and validly issued and has full legal right, title and interest in
     and to the shares of Preferred Shares covered thereby.  The Parties
     acknowledge that such Preferred Shares have been pledged to EIS pursuant to
     Clause 4.8 below and that EIS has physical possession of such Preferred
     Shares.

4.8. In order to secure RPI's obligations pursuant to the Exchange Right, RPI
     hereby pledges, assigns and sets over to EIS, all of RPI's right, title and
     interest in and to all Newco Shares (as defined in the RPI Securities
     Purchase Agreement) deliverable by RPI upon exercise of the Exchange Right
     (including share distributions and dividends thereon).  RPI shall cause to
     be delivered to EIS all of the certificates together with duly executed
     stock power in favor of EIS evidencing such shares, and cause to be filed
     with the Secretary of State of Delaware an appropriate UCC-1 financing
     statement in respect of such pledge, assignment or setting over, and take
     all other necessary, appropriate and customary actions in connection
     therewith.  Such pledge shall be governed by the applicable provisions of
     the Delaware Uniform Commercial Code.   Upon exercise of the Exchange
     Right, EIS shall be entitled to keep and retain such share certificates,
     which shall then be owned by EIS in accordance with the terms thereof. In
     connection with the foregoing, Newco and the Participants shall take all
     necessary or appropriate steps to ensure such ownership by EIS.  Until EIS
     exercises the Exchange Right, RPI shall retain all rights in and to the
     pledged Newco Shares (including without limitation all voting, dividend,
     liquidation and other rights), subject only to this pledge and the terms of
     this Agreement.



                                   CLAUSE 5

                   DIRECTORS; MANAGEMENT AND R&D COMMITTEES

5.1. Directors:
     ---------

     5.1.1     Prior to the exercise of the Exchange Right, the Board shall be
               composed of five Directors.

               RPI shall have the right to nominate four directors of Newco
               ("RPI Directors") and EIS shall have the right to nominate one
               Director of Newco ("EIS Director")

                                       16


               which Director, save as further provided herein, shall only be
               entitled to 15% of the votes of the Board.

               In the event that the Exchange Right is exercised by EIS within
               two years following the Closing Date, the EIS Director shall only
               be entitled to 15% of the votes of the Board until the expiry of
               two years from the Closing Date.

               In the event that the Exchange Right is exercised by EIS at any
               time after two years following the Closing Date or upon the
               expiry of two years following the Closing Date where the Exchange
               Right has been exercised by EIS within two years following the
               Closing Date, each of RPI, and EIS shall cause the Board to be
               reconfigured so that an equal number of Directors are designated
               by EIS and RPI and that each of the Directors has equal voting
               power.

       5.1.2   If EIS removes the EIS Director, or RPI removes any of the RPI
               Directors, EIS or RPI, as the case may be, shall indemnify the
               other Shareholder against any claim by such removed Director
               arising from such removal.

       5.1.3   The Directors shall meet not less than three times in each
               Financial Year and all Board meetings shall be held in Bermuda to
               the extent required pursuant to the laws of Bermuda or to ensure
               the sole residence of Newco in Bermuda.

       5.1.4   At any such meeting, the presence of the EIS Director and at
               least two of the RPI Directors shall be required to constitute a
               quorum and, subject to Clause 18 hereof, the affirmative vote of
               a majority of the Directors present at a meeting at which such a
               quorum is present shall constitute an action of the Directors. In
               the event of any meeting being inquorate, the meeting shall be
               adjourned for a period of seven days. A notice shall be sent to
               the EIS Director and the RPI Directors specifying the date, time
               and place where such adjourned meeting is to be held and
               reconvened.

       5.1.5   On the Closing Date, RPI may appoint one of the RPI Directors to
               be the chairman of Newco. The chairman of Newco shall hold office
               until:

               (i) the first meeting of the Board following the exercise by EIS
                   of the Exchange Right, where the Exchange Right has been
                   exercised by EIS after two years following the Closing Date;
                   or

              (ii) the first meeting of the Board following the expiry of two
                   years following the Closing Date where the Exchange Right
                   has been exercised by EIS within two years following the
                   Closing Date

               (in each case the "Chairman Status Board Meeting")

               After the Chairman Status Board Meeting, each of EIS and RPI,
               beginning with EIS at the Chairman Status Board Meeting, shall
               have the right, exercisable

                                       17


               alternatively, of nominating one Director to be chairman of Newco
               for a term of one year.

               If the chairman is unable to attend any meeting of the Board held
               prior to the Chairman Status Board Meeting, the RPI Directors
               shall be entitled to appoint another RPI Director to act as
               chairman in his place at the meeting.

               If the chairman of Newco is unable to attend any meeting of the
               Board held after the Chairman Status Board Meeting, the Directors
               shall be entitled to appoint another Director to act as chairman
               of Newco in his place at the meeting.

       5.1.6   In case of an equality of votes at a meeting of the Board, the
               chairman of Newco shall not be entitled to a second or casting
               vote. In the event of continued deadlock, the Board shall resolve
               the deadlock pursuant to the provisions set forth in Clause 19.

5.2  Management and R&D Committees:
     ------------------------------


     5.2.1     Newco's board of directors shall appoint a management committee
               (the "Management Committee") to consist initially of four
               members, two of whom shall be nominated by Elan and two of whom
               shall be nominated by RPI, and each of whom shall be entitled to
               one vote, whether or not present at any Management Committee
               meeting. Decisions of the Management Committee shall require
               approval of at least one Elan nominee on the Management Committee
               and one RPI nominee on the Management Committee.

               Each of Elan and RPI shall be entitled to remove any of their
               nominees to the Management Committee and appoint a replacement in
               place of any nominees so removed. The number of members of the
               Management Committee may be altered if agreed to by a majority of
               the directors of Newco; provided that, each of Elan and RPI shall
               be entitled to appoint an equal number of members to the
               Management Committee. The Management Committee shall be
               responsible for, inter alia, devising, implementing and reviewing
               strategy for the Project.

     5.2.2     The Management Committee shall appoint a research and development
               committee (the "R&D Committee"), which shall initially be
               comprised of four members, two of whom shall be nominated by Elan
               and two of whom shall be nominated by RPI, and each of whom shall
               have one vote, whether or not present at an R&D Committee meeting
               during which research and development issues are discussed.
               Decisions of the R&D Committee shall require approval of at least
               one Elan nominee on the R&D Committee and one RPI nominee on the
               R&D Committee.

               Each of Elan and RPI shall be entitled to remove any of their
               nominees to the R&D Committee and appoint a replacement in place
               of any nominees so removed. The number of members of the R&D
               Committee may be altered if agreed to by a majority of the
               directors of Newco provided that each of Elan and

                                       18


               RPI shall be entitled to appoint an equal number of members to
               the R&D Committee.

     5.2.3     The R&D Committee shall be responsible for:

               5.2.3.1   designing that portion of the Business Plan that
                         relates to the Project for consideration by the
                         Management Committee;

               5.2.3.2   establishing a joint Project team consisting of an
                         equal number of team members from Elan and RPI,
                         including one Project leader from each of Elan and RPI;
                         and

               5.2.3.3   implementing such portion of the Business Plan that
                         relates to the Project, as approved by the Management
                         Committee.

     5.2.4     In the event of any dispute amongst the R&D Committee, the R&D
               Committee shall refer such dispute to the Management Committee
               whose decision on the dispute shall be binding on the R&D
               Committee. If the Management Committee cannot resolve the matter
               after 15 days or such other period as may be agreed by the
               Management Committee, the dispute will be referred to the
               President of Elan Pharmaceutical Technologies and the Chief
               Executive Officer of RPI, and thereafter, in the event of
               continued deadlock, pursuant to the deadlock provisions to be set
               forth in Clause 19, involving inter alia, the referral of the
               dispute to an expert, whose decision, however, will ultimately be
               non-binding on the Participants.


                                   CLAUSE 6

                         THE BUSINESS PLAN AND REVIEWS

6.1  The Directors shall meet together as soon as reasonably practicable after
     the Closing Date hereof and shall agree upon and approve the Business Plan
     for the current Financial Year within 60 days of the Closing Date with
     respect to the research, development, and commercialization of the Product,
     which Business Plan shall contain, among other things, to the extent
     practicable, the research and development objectives, desired Product
     specifications, clinical indications, preliminary clinical trial designs
     (Phase I/II), development timelines, budgeted costs and the relative
     responsibilities of RPI and Elan as it relates to the implementation of the
     R&D Plan.

6.2. The Business Plan shall be subject to ongoing review by the Directors and
     the unanimous approval of the Board on a quarterly basis upon mutual
     written agreement.

6.3. Neither Participant shall be obliged to provide funding to Newco in the
     absence of quarterly approval of the Business Plan and a determination by
     each Participant, in its sole discretion, that Subsequent Funding (as such
     term is defined in the Funding Agreement) shall be provided for the
     development of the Products.

                                       19


                                   CLAUSE 7

                         RESEARCH AND DEVELOPMENT WORK

7.1  Research and development work related to the Products and the Newco
     Intellectual Property shall be conducted in accordance with the research
     and development program developed by the R&D Committee and approved by the
     Management Committee.

7.2  The Parties acknowledge that in addition to the Elan License, Elan granted
     to Newco the Elan Research License pursuant to the Elan License Agreement
     solely to use the System for research and to perform clinical
     investigations to determine the commercial viability of the continuous
     subcutaneous administration of Angiozyme(TM) using the System. If the
     Parties jointly determine that the continuous subcutaneous administration
     of Angiozyme(TM) using the System is commercially viable, then the Parties
     shall in good faith negotiate a nonexclusive license to Newco of the Elan
     Intellectual Property and of the RPI Intellectual Property to make, have
     made, import, use, offer for sale and sell such product, subject to then
     existing contractual obligations. Such license agreement shall contain
     normal commercial terms, provided that (i) the research, development and
     commercialization of such product shall be without any cost or obligation
     whatsoever to Elan without Elan's prior written consent which may be
     withheld in Elan's sole discretion, and (ii) [ * ]

     Notwithstanding anything contained in this Clauses 7.2 to the contrary,
     Newco shall not have the license or right to manufacture or have
     manufactured the System with respect to the Product or to manufacture or
     have manufactured Angiozyme(TM) with respect to the product described in
     this Clause 7.2. The Parties agree that the manufacture of the System and
     Angiozyme(TM) is subject to Clause 14 below.

7.3  Subject to the provisions of Clause 6.3, Elan and RPI shall undertake at
     their discretion research and development work related to the development
     and commercialization of the Products, at the request of Newco and as
     articulated in the Business Plan, in furtherance of the development and
     commercialization of the Products and cultivation of patent rights and
     know-how related to the Elan Intellectual Property, RPI Intellectual
     Property and Newco Intellectual Property. The cost of such development work
     shall be Elan's and RPI's, as the case may be, fully-burdened actual costs
     in respect thereof, plus [*] of such costs. Research and development work
     that is sub-contracted by Elan or RPI to third party providers shall be
     charged by Elan or RPI to Newco at the amount invoiced by the relevant
     third party provider. Newco shall pay RPI and Elan for any research and
     development work carried out by them on behalf of Newco at the end of each
     month during the Research and Development Program, subject to the proper
     vouching of research and development work and expenses. An invoice shall be
     issued to Newco by RPI or Elan, as applicable, by the 15/th/ day of the
     month following the month in which work was performed.

                                       20


7.4  Elan and RPI shall use reasonable efforts in undertaking any such research
     and development work undertaken for Newco hereunder to conduct such
     research and development work in a professional and timely manner.

7.5  Elan and RPI shall permit Newco or its duly authorized representative on
     reasonable notice and at any reasonable time during normal business hours
     to have access to inspect and audit the accounts and records of Elan or RPI
     and any other book, record, voucher, receipt or invoice relating to the
     calculation or the cost of the Research and Development Program and to the
     accuracy of the reports which accompanied them. Any such inspection of
     Elan's or RPI's records, as the case may be, shall be at the expense of
     Newco, except that if such inspection reveals an overpayment in the amount
     paid to Elan or RPI, as the case may be, for the Research and Development
     Program hereunder in any Financial Year of [ * ] or more of the amount due
     to Elan or RPI, as the case may be, then the expense of such inspection
     shall be borne solely by Elan or RPI, as the case may be, instead of by
     Newco. Any surplus over the sum properly payable by Newco to Elan or RPI,
     as the case may be, shall be paid promptly by Elan or RPI, as the case may
     be, to Newco. If such inspection reveals a deficit in the amount of the sum
     properly payable to Elan or RPI, as the case may be, by Newco, Newco shall
     pay the deficit to Elan or RPI, as the case may be.


                                   CLAUSE 8

                               COMMERCIALIZATION

8.1  Newco shall diligently pursue the research, development, prosecution and
     commercialization of the Products as provided in the Business Plan.

8.2  At such time as Newco notifies Elan in writing that Newco in good faith
     intends to commercialize a Product, Elan shall have a [ * ] the terms of
     any agreement for [ * ], which option shall be exercised within [*] days of
     Elan's receipt of such written notification from Newco (the "Elan/Newco
     Option"); [ * ]. If Elan elects to enter into such negotiations, the
     Parties shall negotiate in good faith the terms of an applicable agreement.

     If, despite good faith negotiations, Elan and Newco do not reach agreement
     within [ * ] from [ * ], then Newco shall be free to enter into
     negotiations and an agreement with a third party (other than a
     Technological Competitor of Elan) upon which the third party would
     commercialize the relevant Product in the Territory, which terms when taken
     as a whole, are not more favourable to the third party than the principal
     terms of the last written proposal offered by Newco to Elan or by Elan to
     Newco, as the case may be. The Parties shall act in good faith and use
     their reasonable commercial judgement when negotiating with such third
     party for the commercialization of the Product in the Territory. For
     purposes of this Clause 8.2, the term Elan shall include Elan and its
     Affiliates.


                                       21


                                   CLAUSE 9

                       SUBLICENSE AND ASSIGNMENT RIGHTS

9.1       Newco shall be permitted to assign or sublicense the Newco
          Intellectual Property and to enter into agreements with third parties
          for the development of the Newco Intellectual Property upon unanimous
          approval by the Management Committee.

9.2       Upon 30 days prior notice in writing from Elan to Newco and RPI, Newco
          shall assign the Newco Intellectual Property from Newco to a wholly-
          owned subsidiary of Newco to be incorporated in Ireland, which company
          shall be newly incorporated by Elan to facilitate such assignment.

9.3       The Parties acknowledge and agree to be bound by the provisions of
          Clause 2.6 of the Elan License Agreement and the provisions of Clause
          2.6 of the RPI License Agreement which set forth the agreement between
          the Parties thereto in relation to the assignment and sub-licensing of
          the Elan Intellectual Property and the RPI Intellectual Property
          respectively.


                                   CLAUSE 10

           OWNERSHIP OF INTELLECTUAL PROPERTY RIGHTS/NON-COMPETITION

10.1.     The Parties acknowledge and agree to be bound by the provisions of
          Clause 3 of the Elan License Agreement and Clause 3 of the RPI License
          Agreement which set forth the agreement between the parties thereto in
          relation to the ownership of the Elan Intellectual Property, the RPI
          Intellectual Property and the Newco Intellectual property
          respectively.

10.2      The Parties acknowledge and agree to be bound by the provisions of
          Clause 4 of the Elan License Agreement and the provisions of Clause 4
          of the RPI License Agreement which set forth the agreement between the
          parties thereto in relation to the non-competition obligations of Elan
          and RPI, respectively.


                                   CLAUSE 11

                         INTELLECTUAL PROPERTY RIGHTS

11.1      Elan, at its expense and sole discretion shall (i) secure the grant of
          any patent applications within the Elan Patents that relate to the
          Field; (ii) file and prosecute patent applications on patentable
          inventions and discoveries within the Elan Improvements that relate to
          the Field; (iii) defend all such applications against third party
          oppositions; and (iv) maintain in force any issued letters patent
          within the Elan Patents that relate to the Field (including

                                       22


          any letters patent that may issue covering any such Elan Improvements
          that relate to the Field). Elan shall have the right in its sole
          discretion to control such filing, prosecution, defense and
          maintenance provided that Newco and RPI at their request shall be
          provided with copies of all documents relating to such filing,
          prosecution, defense and maintenance in sufficient time to review such
          documents and comment thereon prior to filing.

11.2      RPI, at its expense and sole discretion, shall (i) secure the grant of
          any patent applications within the RPI Patents that relate to the
          Field; (ii) file and prosecute patent applications on patentable
          inventions and discoveries within the RPI Improvements that relate to
          the Field; (iii) defend all such applications against third party
          oppositions; and (iv) maintain in force any issued letters patent
          within the RPI Patents that relate to the Field (including any letters
          patent that may issue covering any such RPI Improvements that relate
          to the Field). RPI shall have the right in its sole discretion to
          control such filing, prosecution, defense and maintenance provided
          that Elan and Newco at their request shall be provided with copies of
          all documents relating to such filing, prosecution, defense and
          maintenance in sufficient time to review such documents and comment
          thereon prior to filing.

11.3      In the event that Elan does not intend to file for patent protection
          on patentable inventions or discoveries within the Elan Intellectual
          Property that relates to the Field in one or more countries in the
          Territory after providing written notice to Newco and RPI, Newco shall
          have the option at Newco's expense, upon the prior written approval of
          Elan which approval shall not be unreasonably withheld, to request
          Elan to file and prosecute such patent application(s) jointly on
          behalf of Newco and RPI. Upon such written request from Newco, Elan
          shall be responsible for preparing and prosecuting and otherwise
          seeking patent protection for such Elan Intellectual Property
          described in this Clause 11.3. Any such Elan Intellectual Property
          shall be owned by Elan but Elan shall grant to Newco a royalty free
          exclusive license to such Elan Intellectual Property in the Field. The
          Parties shall have the right to remove their confidential information
          from any such patent application.

11.4      In the event that RPI does not intend to file for patent protection on
          patentable inventions or discoveries within the RPI Intellectual
          Property that relates to the Field in one or more countries in the
          Territory after providing written notice to Newco and Elan, Newco
          shall have the option at Newco's expense, upon the prior written
          approval of RPI which approval shall not be unreasonably withheld, to
          request RPI to file and prosecute such patent application(s) jointly
          on behalf of Newco and Elan. Upon such written request from Newco, RPI
          shall be responsible for preparing and prosecuting and otherwise
          seeking patent protection for such RPI Intellectual Property described
          in this Clause 11.3. Any such RPI Intellectual Property shall be owned
          by RPI but RPI shall grant a royalty free exclusive license to Newco
          to such RPI Intellectual Property in the Field. The Parties shall have
          the right to remove their confidential information from any such
          patent application.

                                       23


11.5      Newco at its expense shall have the right but shall not be obligated
          (i) to file and prosecute patent applications on patentable inventions
          and discoveries within the Newco Intellectual Property; (ii) to defend
          all such applications against third party oppositions; and (iii) to
          maintain in force any issued letters patent within the Newco Patents
          (including any patents that issue on patentable inventions and
          discoveries within the Newco Intellectual Property). Newco shall have
          the right to control such filing, prosecution, defense and maintenance
          provided that the other Parties shall be provided with copies of all
          documents relating to such filing, prosecution, defense, and
          maintenance in sufficient time to review such documents and comment
          thereon prior to filing. The Parties shall have the right to remove
          their confidential information from any such patent application.

11.6      In the event that Newco informs both Elan and RPI that it does not
          intend to file an application on the Newco Intellectual Property in or
          outside the Field, Elan shall have the right to file and prosecute
          such patent applications on inventions that Elan invents solely or
          which relate predominantly to the Elan Intellectual Property, and RPI
          shall have the right to file and prosecute such patent applications on
          inventions which RPI invents solely or which relate predominantly to
          the RPI Intellectual Property, and Elan and RPI agree to negotiate in
          good faith on the course of action to be taken with respect to Newco
          inventions that relate to both the Elan and RPI Intellectual Property.
          The Parties shall have the right to remove their confidential
          information from any such patent application.

11.7      The Parties shall promptly inform each other in writing of any actual
          or alleged unauthorized use of any Elan Intellectual Property, the RPI
          Intellectual Property or the Newco Intellectual Property by a third
          party of which it becomes aware and provide the others with any
          available evidence of such unauthorized use.

11.8      At its option, as the case may be, Elan or RPI shall have the first
          option to enforce at its own expense and for its own benefit any
          unauthorized use of its respective Intellectual Property (the Elan
          Intellectual Property or the RPI Intellectual Property as the case may
          be) in the Field. At the enforcing party's request, the other Parties
          shall cooperate with such action. Should Elan or RPI decide not to
          enforce the Elan Intellectual Property or the RPI Intellectual
          Property respectively, against such unauthorized use in the Field,
          within a reasonable period but in any event within twenty (20) days
          after receiving written notice of such actual or alleged unauthorized
          use, Newco may in its discretion initiate such proceedings in its own
          name, at its expense and for its own benefit, and at such Party's
          request, Elan and RPI shall cooperate with such action. Any recovery
          remaining after the deduction by Newco of the reasonable expenses
          (including attorney's fees and expenses) incurred in relation to such
          enforcement proceeding shall belong to Newco. Alternatively, the
          Parties may agree to institute such proceedings in their joint names
          and shall reach agreement as to the proportion in which they shall
          share the proceeds of any such proceedings, and the expense of any
          costs not recovered, or the costs or damages payable to the third
          party. If the infringement of the Elan Patents or the RPI Patents
          affects both the Field as well as other products being developed or
          commercialized by RPI or Elan or its commercial partners outside the
          Field, RPI or Elan shall endeavor to agree as to the manner in which
          the proceedings should be instituted and as to the proportion in which
          they shall share the proceeds of any such proceedings,

                                       24


          and the expense of any costs not recovered, or the costs or damages
          payable to the third party.

11.9      Newco shall have the first right but not the obligation to bring suit
          or otherwise take action against any unauthorized use of the Newco
          Intellectual Property. If any such alleged use occurs that gives rise
          to a cause of action both inside and outside the Field, Newco, in
          consultation with the other Parties, shall determine the course of
          action to be taken. In the event that Newco takes such action, Newco
          shall do so at its own cost and expense and all damages and monetary
          award recovered in or with respect to such action shall be the
          property of Newco. Newco shall keep Elan and RPI informed of any
          action in a timely manner so as to enable RPI and Elan to provide
          input in any such action and Newco shall reasonably take into
          consideration any such input. At Newco's request, the Parties shall
          cooperate with any such action at Newco's cost and expense.

11.10     In the event that Newco does not bring suit or otherwise take action
          against any unauthorized use of the Newco Intellectual Property (i) if
          only one Party determines to pursue such suit or take such action at
          its own cost and expense, it shall be entitled to all damages and
          monetary award recovered in or with respect to such action and (ii) if
          the other Parties pursue such suit or action outside of Newco, they
          shall negotiate in good faith an appropriate allocation of costs,
          expenses and recovery amounts. At the Party's request, Newco shall
          cooperate with any such action at the Party's cost and expense.

11.11     In the event that a claim or proceeding is brought against Newco by a
          third party alleging that the sale, distribution or use of a Product
          in the Territory constitutes the unauthorized use of the intellectual
          property rights of such Party, Newco shall promptly advise the other
          Parties of such threat or suit.

11.12     Save in respect of claims by Newco against either Party, or by an
          Independent Third Party against Newco, where Elan is in breach of a
          representation or warranty under [ * ] or where RPI is in breach of a
          representation or warranty under [ * ] shall indemnify, defend and
          hold harmless Elan or RPI, as the case may be, against all actions,
          losses, claims, demands, damages, costs and liabilities (including
          reasonable attorneys fees) relating directly or indirectly to all such
          claims or proceedings referred to in [ * ], provided that Elan
          or RPI, as the case may be, shall not acknowledge to the third party
          or to any other person the validity of any claims of such a third
          party, and shall not compromise or settle any claim or proceedings
          relating thereto without the prior written consent to Newco, not to be
          unreasonably withheld or delayed. At its option, Elan or RPI, as the
          case may be, may elect to take over the conduct of such proceedings
          from Newco provided that Newco's indemnification obligations shall
          continue; the costs of defending such claim shall be borne by Elan or
          RPI, as the case may be and such Party shall not compromise or settle
          any such claim or proceeding without the prior written consent of
          Newco, such consent not to be unreasonably withheld or delayed.

                                      25


                                   CLAUSE 12

          CROSS LICENSING/EXPLOITATION OF PRODUCTS OUTSIDE THE FIELD

  12.1    Solely for the purpose of and insofar as is necessary, in each case,
          for Elan to perform research and development work on behalf of Newco,
          Newco shall grant to Elan a non-exclusive, worldwide, royalty-free,
          fully paid-up license for the term of the Licenses:

          12.1.1    to use the Newco Intellectual Property in the Field, and

          12.1.2    subject to the terms and conditions of the RPI License, a
                    sublicense to use the RPI Intellectual Property in the
                    Field.

12.2      Solely for the purpose of and insofar as is necessary, in each case,
          for RPI to conduct research and development work on behalf of Newco,
          Newco shall grant to RPI a non-exclusive, worldwide, royalty-free,
          fully paid-up license for the term of the Licenses:

          12.2.1    to use the Newco Intellectual Property in the Field, and

          12.2.2    subject to the terms and conditions of the Elan License and
                    the Elan Research License, a sublicense to use the Elan
                    Intellectual Property in the Field.

12.3      Subject to the provisions of this Clause 12, Newco hereby grants to
          each of Elan and RPI a license to the Newco Intellectual Property as
          follows:

          12.3.1    Newco hereby grants to Elan a worldwide, perpetual, fully-
                    paid and royalty-free license, with the right to sublicense,
                    to the Newco Intellectual Property as it relates to the
                    System for use outside the Field on an as-is basis without
                    recourse, representation or warranty whether express or
                    implied, including warranties of merchantability or fitness
                    for a particular purpose, or infringement of third party
                    rights, and all such warranties are expressly disclaimed.

          12.3.2    Newco hereby grants to RPI a worldwide, perpetual, fully-
                    paid and royalty-free license, with the right to sublicense,
                    to the Newco Intellectual Property as it relates to the
                    Target Ribozyme for use outside the Field on an as-is basis
                    without recourse, representation or warranty whether express
                    or implied, including warranties of merchantability or
                    fitness for a particular purpose, or infringement of third
                    party rights, and all such warranties are expressly
                    disclaimed.


                                   CLAUSE 13

                                  REGULATORY

13.1      Newco shall keep the other Parties promptly and fully advised of
          Newco's regulatory activities, progress and procedures. Newco shall
          inform the other Parties of any dealings

                                       26


          it shall have with an RHA, and shall furnish the other Parties with
          copies of all correspondence relating to the Products. The Parties
          shall collaborate to obtain any required Regulatory Approval of the
          RHA to market the Products.

13.2      Subject to the unanimous determination of the Management Committee
          that one or more regulatory approvals for permission to conduct
          clinical studies and/or for commercialization should be held in the
          name of Newco's commercial partner, such regulatory approvals related
          to the Products and/or the Newco Intellectual Property shall be
          prosecuted and owned by Newco in accordance with the Business Plan.

          All regulatory approvals and submissions relating to the Target
          Ribozyme, including without limitation, the DMF, shall be processed by
          and be the property of RPI and at all times held in RPI's sole name.
          All regulatory approvals and submissions relating to the System,
          including without limitation, the MAF, shall be processed by and be
          the property of Elan and at all times held in Elan's sole name. Each
          of Elan and RPI will authorize Newco to reference such Party's
          respective regulatory approval and submission, as described herein,
          with the FDA and such foreign agency to the extent necessary for
          Newco's regulatory purposes.

13.3      It is hereby acknowledged that there are inherent uncertainties
          involved in the registration of pharmaceutical products with the RHA's
          insofar as obtaining approval is concerned and such uncertainties form
          part of the business risk involved in undertaking the form of
          commercial collaboration as set forth in this Agreement.


                                   CLAUSE 14

                                 MANUFACTURING

14.1      Subject to the provisions of Clause 14.2, Newco shall be responsible
          for manufacturing, or having manufactured, all quantities of Products
          required for the development and commercialization of Products for use
          in the Field.

14.2      Notwithstanding the provisions of Clause 14.1, Elan shall have the
          first right to manufacture and supply, and/or subcontract the
          manufacture and supply, of (a) the System with respect to the Product,
          and (b) the System with respect to the product relating to
          Angiozyme(TM), on standard commercial terms negotiated in good faith
          by Newco and Elan. RPI shall have the first right to manufacture and
          supply, and/or subcontract the manufacture and supply, of (1) the
          Target Ribozyme with respect to the Product, and (2) Angiozyme(TM), on
          standard commercial terms negotiated in good faith by Newco and RPI.

          Any such supply agreement shall be negotiated and agreed by the
          Parties not later than the date of completion of Phase III (as such
          term is commonly used in connection with FDA applications) of the R&D
          Plan. The terms of the said supply agreements shall be on normal
          commercial terms, and shall be negotiated in good faith by the Parties
          thereto.

                                       27


                                   CLAUSE 15

                       TECHNICAL SERVICES AND ASSISTANCE

15.1      Whenever commercially and technically feasible, Newco shall contract
          with RPI or Elan, as the case may be, to perform such other services
          as Newco may require, other than those specifically dealt with
          hereunder or in the License Agreements. In determining which Party
          should provide such services, the Management Committee shall take into
          account the respective infrastructure, capabilities and experience of
          Elan and RPI. There shall be no obligation upon either of RPI or Elan
          to perform such services.

15.2      Newco shall, if the Participants so agree, conclude an administrative
          support agreement with Elan and/or RPI on such terms as the Parties
          thereto shall in good faith negotiate. The administrative services
          shall include one or more of the following administrative services as
          requested by Newco:

          15.2.1    accounting, financial and other services;

          15.2.2    tax services;

          15.2.3    insurance services;

          15.2.4    human resources services;

          15.2.5    legal and company secretarial services;

          15.2.6    patent and related intellectual property services; and

          15.2.7    all such other services consistent with and of the same type
                    as those services to be provided pursuant to this Agreement,
                    as may be required.

          The foregoing list of services shall not be deemed exhaustive and may
          be changed from time to time upon written request by Newco.

15.3.     The Parties agree that each Party shall effect and maintain
          comprehensive general liability insurance in respect of all clinical
          trials and other activities performed by them on behalf of Newco. The
          Shareholders and Newco shall ensure that the industry standard
          insurance policies shall be in place for all activities to be carried
          out by Newco.

15.4      If Elan or RPI so requires, RPI or Elan, as the case may be, shall
          receive, at times and for periods mutually acceptable to the Parties,
          employees of the other Party (such employees to be acceptable to the
          receiving Party in the matter of qualification and competence) for
          instruction in respect of the Elan Intellectual Property or the RPI
          Intellectual Property, as the case may be, as necessary to further the
          Project.

                                       28


15.5 The employees received by Elan or RPI, as the case may be, shall be subject
     to obligations of confidentiality no less stringent than those set out in
     Clause 22 and such employees shall observe the rules, regulations and
     systems adopted by the Party receiving the said employees for its own
     employees or visitors.


                                   CLAUSE 16

                     AUDITORS, BANKERS, REGISTERED OFFICE,
                      ACCOUNTING REFERENCE DATE; SECRETARY

Unless otherwise agreed by the Shareholders and save as may be provided to the
contrary herein:

16.1 the auditors of Newco shall be KPMG Peat Marwick of Vallis Building,
     Hamilton, Bermuda;

16.2 the bankers of Newco shall be Bank of Bermuda or such other bank as may be
     mutually agreed from time to time;

16.3 the accounting reference date of Newco shall be December 31st in each
     Financial Year; and

16.4 the secretary of Newco shall be I.S. Outerbridge or such other Person as
     may be appointed by the Directors from time to time.


                                   CLAUSE 17

                              TRANSFERS OF SHARES;
                     RIGHT OF FIRST OFFER; TAG ALONG RIGHTS

     General:
     --------

17.1. Until such time as the Common Shares shall be registered pursuant to the
      Exchange Act and be publicly traded in an established securities market,
      no Shareholder shall, directly or indirectly, sell or otherwise transfer
      (each, a "Transfer") any Shares held by it except in as expressly
      permitted by and in accordance with the terms of this Agreement. Newco
      shall not, and shall not permit any transfer agent or registrar for any
      Shares to, transfer upon the books of Newco any Shares from any
      Shareholder to any transferee, in any manner, except in accordance with
      this Agreement, and any purported transfer not in compliance with this
      Agreement shall be void.

      During the Research and Development Term, no Shareholder shall, directly
      or indirectly, sell or otherwise Transfer any of its legal and/or
      beneficial interest in the Shares held by it to any other Person. After
      completion of the Research and Development Term, a

                                       29


      Shareholder may Transfer Shares provided such Shareholder complies with
      the provisions of Clauses 17.2 and 17.3.

      Notwithstanding anything contained herein to the contrary, at all times,
      EIS and/or RPI shall have the right to Transfer any Shares to their
      Affiliates provided, however, that such assignment does not result in
      adverse tax consequences for any other Parties. EIS shall have the right
      to Transfer any Shares to a special purpose financing or similar entity
      established by Elan or EIS; provided, that such Affiliates or other
      Permitted Transferee to which such legal and/or beneficial interest in the
      Shares have been transferred shall agree to be expressly subject to and
      bound by all the limitations and provisions which are embodied in this
      Agreement.

17.2  No Shareholder shall, except with the prior written consent of the other
      Shareholder, create or permit to subsist any Encumbrance over or in, all
      or any of the Shares held by it (other than by a Transfer of such Shares
      in accordance with the provisions of this Agreement).

17.3  Rights of First Offer:
      ----------------------

      If at any time after the end of the Research and Development Term a
      Shareholder shall desire to Transfer any Shares owned by it (a "Selling
      Shareholder"), in any transaction or series of related transactions other
      than a Transfer to an Affiliate or subsidiary or in the case of EIS to a
      special purpose financing or similar entity established by EIS, then such
      Selling Shareholder shall deliver prior written notice of its desire to
      Transfer (a "Notice of Intention") (i) to Newco and (ii) to the
      Shareholders who are not the Selling Shareholder (and any transferee
      thereof permitted hereunder, if any), as applicable, setting forth such
      Selling Shareholder's desire to make such Transfer, the number of Shares
      proposed to be transferred (the "Offered Shares") and the proposed form of
      transaction (the "Transaction Proposal"), together with any available
      documentation relating thereto, if any, and the price at which such
      Selling Shareholder proposes to Transfer the Offered Shares (the "Offer
      Price"). The "Right of First Offer" provided for in this Clause 17 shall
      be subject to any "Tag Along Right" benefiting a Shareholder which may be
      provided for by Clause 17, subject to the exceptions set forth therein.

      Upon receipt of the Notice of Intention, the Shareholders who are not the
      Selling Shareholder shall have the right to purchase at the Offer Price
      the Offered Shares, exercisable by the delivery of notice to the Selling
      Shareholder (the "Notice of Exercise"), with a copy to Newco, within 10
      business days from the date of receipt of the Notice of Intention. If no
      such Notice of Exercise has been delivered by the Shareholders who are not
      the Selling Shareholder within such 10-business day period, or such Notice
      of Exercise does not relate to all of the Offered Shares covered by the
      Notice of Intention, then the Selling Shareholder shall be entitled to
      Transfer all of the Offered Shares to the intended transferee. In the
      event that all of the Offered Shares are not purchased by the non-selling
      Shareholders, the Selling Shareholder shall sell the available Offered
      Shares within 30 days after the delivery of such Notice of Intention on
      terms no more favorable to a third party than those presented to the non-
      selling Shareholders. If such sale does not

                                       30


      occur, the Offered Shares shall again be subject to the Right of First
      Refusal set forth in Clause 17.3.

      In the event that any of the Shareholders who are not the Selling
      Shareholder exercises their right to purchase all of the Offered Shares
      (in accordance with this Clause 17), then the Selling Shareholder shall
      sell all of the Offered Shares to such Shareholder(s), in the amounts set
      forth in the Notice of Intention, after not less than 10 business days and
      not more than 25 business days from the date of the delivery of the Notice
      of Exercise. In the event that more than one of the Shareholders who are
      not the Selling Shareholders wish to purchase the Offered Shares, the
      Offered Shares shall be allocated to such Shareholders on the basis of
      their pro rata equity interests in Newco.

      The rights and obligations of each of the Shareholders pursuant to the
      Right of First Offer provided herein shall terminate upon the date that
      the Common Shares are registered under Section 12(b) or 12(g) of the
      Exchange Act.

      At the closing of the purchase of all of the Offered Shares by the
      Shareholders who are not the Selling Shareholder (scheduled in accordance
      with Clause 17), the Selling Shareholder shall deliver certificates
      evidencing the Offered Shares being sold, duly endorsed, or accompanied by
      written instruments of transfer in form reasonably satisfactory to the
      Shareholders who are not the Selling Shareholder, duly executed by the
      Selling Shareholder, free and clear of any adverse claims, against payment
      of the purchase price therefor in cash, and such other customary documents
      as shall be necessary in connection therewith.

17.4  Tag Along Rights:
      -----------------

      Subject to Clause 17.3, a Shareholder (the "Transferring Shareholder")
      shall not Transfer (either directly or indirectly), in any one transaction
      or series of related transactions, to any Person or group of Persons, any
      Shares, unless the terms and conditions of such Transfer shall include an
      offer to the other Shareholders (the "Remaining Shareholders"), to sell
      Shares at the same price and on the same terms and conditions as the
      Transferring Shareholder has agreed to sell its Shares (the "Tag Along
      Right").

      In the event a Transferring Shareholder proposes to Transfer any Shares in
      a transaction subject to this Clause 17.4, it shall notify, or cause to be
      notified, the Remaining Shareholders in writing of each such proposed
      Transfer. Such notice shall set forth: (i) the name of the transferee and
      the amount of Shares proposed to be transferred, (ii) the proposed amount
      and form of consideration and terms and conditions of payment offered by
      the transferee (the "Transferee Terms") and (iii) that the transferee has
      been informed of the Tag Along Right provided for in this Clause 17, if
      such right is applicable, and the total number of Shares the transferee
      has agreed to purchase from the Shareholders in accordance with the terms
      hereof.

                                       31


     The Tag Along Right may be exercised by each of the Remaining Shareholders
     by delivery of a written notice to the Transferring Shareholder (the "Co-
     sale Notice") within 10 business days following receipt of the notice
     specified in the preceding subsection.  The Co-sale Notice shall state the
     number of Shares owned by such Remaining Shareholder which the Remaining
     Shareholder wishes to include in such Transfer; provided, however, that
     without the written consent of the Transferring Shareholder, the amount of
     such securities belonging to the Remaining Shareholder included in such
     Transfer may not be greater than such Remaining Shareholder's percentage
     beneficial ownership of Fully Diluted Common Shares multiplied by the total
     number of shares of 7 Diluted Common Shares to be sold by both the
     Transferring Shareholder and all Remaining Shareholders.  Upon receipt of a
     Co-sale Notice, the Transferring Shareholder shall be obligated to transfer
     at least the entire number of Shares set forth in the Co-sale Notice to the
     transferee on the Transferee Terms; provided, however, that the
     Transferring Shareholder shall not consummate the purchase and sale of any
     Shares hereunder if the transferee does not purchase all such Shares
     specified in all Co-sale Notices.  If no Co-sale Notice has been delivered
     to the Transferring Shareholder prior to the expiration of the 10 business
     day period referred to above and if the provisions of this Section have
     been complied with in all respects, the Transferring Shareholder shall have
     the right for a 45 day calendar day period to Transfer Shares to the
     transferee on the Transferee Terms without further notice to any other
     party, but after such 45-day period, no such Transfer may be made without
     again giving notice to the Remaining Shareholders of the proposed Transfer
     and complying with the requirements of this Clause 17.

     At the closing of any Transfer of Shares subject to this Clause 17, the
     Transferring Shareholder, and the Remaining Shareholder, in the event such
     Tag Along Right is exercised, shall deliver certificates evidencing such
     securities as have been Transferred by each, duly endorsed, or accompanied
     by written instruments of transfer in form reasonably satisfactory to the
     transferee, free and clear of any adverse claim, against payment of the
     purchase price therefor.

     Notwithstanding the foregoing, this Clause 17 shall not apply to any sale
     of Common Shares pursuant to an effective registration statement under the
     Securities Act in a bona fide public offering.



                                   CLAUSE 18

                   MATTERS REQUIRING PARTICIPANTS' APPROVAL

18.1 In consideration of RPI and Elan agreeing to enter into the License
     Agreements, the Parties hereby agree that Newco shall not without the prior
     approval of the EIS Director and the four RPI Directors:

                                       32


     18.1.1.   make a material Newco determination outside the ordinary course
               of business, including, among other things, acquisitions or
               dispositions of intellectual property and licenses or
               sublicenses, discontinue Newco to a named country or jurisdiction
               outside of Bermuda, changes in the Business or the Newco budget
               as they relate to the Licensed Technologies; entry into joint
               ventures and similar arrangements as they relate to the Licensed
               Technologies and changes to the Business Plan as they relate to
               the Licensed Technologies;

     18.1.2.   issue any unissued Shares or unissued Common Share Equivalents,
               or create or issue any new shares (including a split of the
               Shares) or Common Share Equivalents, except as expressly
               permitted by the Newco Memorandum of Association and Bye-Laws;

     18.1.3.   alter any rights attaching to any class of share in the capital
               of Newco or alter the Newco Memorandum of Association and Bye-
               Laws;

     18.1.4.   consolidate, sub-divide or convert any of Newco's share capital
               or in any way alter the rights attaching thereto;

     18.1.5.   dispose of all or substantially all of the assets of Newco;

     18.1.6.   do or permit or suffer to be done any act or thing whereby Newco
               may be wound up (whether voluntarily or compulsorily), save as
               otherwise expressly provided for in this Agreement;

     18.1.7.   enter into any contract or transaction except in the ordinary and
               proper course of the Business on arm's length terms;

     18.1.8.   sub-license any of the Elan Intellectual Property or RPI
               Intellectual Property, or license Newco Intellectual Property;

     18.1.9.   amend or vary the terms of the RPI License Agreement or the Elan
               License Agreement;

     18.1.10.  permit a person other than Newco to own a Regulatory Approval
               relating to the Product(s);

     18.1.11.  amend or vary the Business Plan or the Newco budget as they
               relate to the Licensed Technologies;

     18.1.12.  alter the number of Directors;

     18.1.13.  whether any Shares of Newco shall be registered for public
               trading with any governmental authority for public trading in any
               securities market; and

                                       33


     18.1.14.  declare or pay any dividend or make any distribution, directly or
               indirectly, with respect to its capital stock; or issue, sell,
               exchange, deliver, redeem, purchase or otherwise acquire or
               dispose of any shares of its capital stock or other securities.


                                   CLAUSE 19

                                    DISPUTES

19.1 During the Term of this Agreement, should any dispute or difference arise
     amongst the members of the Management Committee, or between Elan and RPI,
     or between Elan or RPI and Newco, the appropriate representatives of the
     applicable Parties shall use good faith efforts to resolve such dispute or
     difference promptly and to the mutual satisfaction of the affected Parties.
     If with respect to any such dispute or difference (but excluding from the
     remaining provisions of this Clause 19 any dispute or difference relating
     to (i) the interpretation of any provision of this Agreement, (ii) the
     interpretation or application of law, or (iii) the ownership of any
     intellectual property, which disputes or differences shall be resolved, if
     at all, by arbitration pursuant to Clause 24.8), such representatives
     cannot reach a resolution to such dispute or difference within a reasonable
     period, then any Party may forthwith give notice to the other Parties that
     it wishes such dispute or difference to be referred to the chief executive
     officer of RPI and the President of Elan Pharmaceutical Technologies.

19.2 In any event of a notice being served in accordance with Clause 19.1, each
     of the Participants shall within 14 days of the service of such notice
     prepare and circulate to the chief executive officer of each Participant a
     memorandum or other form of statement setting out its position on the
     matter in dispute and its reasons for adopting that position.  Each
     memorandum or statement shall be considered by the chief executive officers
     of the Participants who shall endeavor using good faith diligent efforts to
     resolve the dispute.  If the chief executive officers of the Participants
     agree upon a resolution or disposition of the matter, they shall each sign
     a statement which sets out the terms of their agreement.  The Participants
     agree that they shall exercise the voting rights and other powers available
     to them in relation to Newco to procure that the agreed terms are fully and
     promptly carried into effect.

19.3 The chief executive officer of RPI and the President of Elan Pharmaceutical
     Technologies shall, if they are unable to resolve a dispute or difference
     when it is referred to them under Clause 19.1, within sixty (60) days of
     such referral, refer the matter to an independent expert in pharmaceutical
     product development and marketing (including clinical development and
     regulatory affairs) jointly selected by the chief executive officers of the
     Participants (the "Expert").  In the event the chief executive officers of
     the Participants cannot agree upon the designation of the Expert, the
     Participants shall request the American Arbitration Association ("AAA"),
     sitting in the City of New York to select the Expert.  In each case, the
     Expert shall be selected having regard to his suitability to determine the
     particular dispute or difference on which the Expert is being requested to
     determine.  Unless otherwise agreed between the chief executive officers,

                                       34


     the following rules shall apply to the appointment of the Expert.  The fees
     of the AAA and the Expert shall be shared equally by the Participants. The
     Expert shall be entitled to inspect and examine all documentation and any
     other material which the Expert may consider to be relevant to the dispute.
     The Expert shall afford each Party a reasonable opportunity (in writing or
     orally) of stating reasons in support of such contentions as each Party may
     wish to make relative to the matters under consideration.  The Expert shall
     give notice in writing of his determination to the Parties within such time
     as may be stipulated in his terms of appointment or in the absence of such
     stipulation as soon as practicable but in any event within four weeks from
     the reference of the dispute or difference to him.

19.4 Any determination by the Expert of a dispute or difference shall not be
     binding on the Parties.


                                   CLAUSE 20

                                  TERMINATION

20.1 This Agreement shall govern the operation and existence of Newco until (i)
     terminated by written agreement of all Parties hereto or (ii) otherwise
     terminated in accordance with this Clause 20.

20.2 For the purpose of this Clause 20, a "Relevant Event" is committed or
     suffered by a Participant if:

     20.2.1    it commits a breach of its material obligations under this
               Agreement or the applicable License and fails to remedy it within
               60 days of being specifically required in writing to do so by the
               other Participant; provided, however, that if the breaching
               Participant has proposed a course of action to rectify the breach
               and is acting in good faith to rectify same but has not cured the
               breach by the 60th day, such period shall be extended by such
               period as is reasonably necessary to permit the breach to be
               rectified; or

     20.2.2    a distress, execution, sequestration or other process is levied
               or enforced upon or sued out against a material part of its
               property which is not discharged or challenged within 30 days; or

     20.2.3    it is unable to pay its debts in the normal course of business;
               or

     20.2.4    it ceases wholly or substantially to carry on its business,
               otherwise than for the purpose of a reconstruction or
               amalgamation, without the prior written consent of the other
               Participant (such consent not to be unreasonably withheld); or

     20.2.5    the appointment of a liquidator, receiver, administrator,
               examiner, trustee or similar officer of such Participant or over
               all or substantially all of its assets under

                                       35


               the law of any applicable jurisdiction, including without
               limitation, the United States of America, Bermuda or Ireland; or

     20.2.6    an application or petition for bankruptcy, corporate re-
               organization, composition, administration, examination,
               arrangement or any other procedure similar to any of the
               foregoing under the law of any applicable jurisdiction, including
               without limitation, the United States of America, Bermuda or
               Ireland, is filed, and is not discharged within 60 days, or a
               Participant applies for or consents to the appointment of a
               receiver, administrator, examiner or similar officer of it or of
               all or a material part of its assets, rights or revenues or the
               assets and/or the business of a Participant are for any reason
               seized, confiscated or condemned.

20.4 If either Participant commits or suffers a Relevant Event, the other
     Participant shall be entitled, within three months of the occurrence of the
     Relevant Event, to require the defaulting Participant (the "Recipient
     Participant") to sell on reasonable terms of payment to the non-defaulting
     Participant (the "Proposing Participant") all (but not some only) of the
     Shares, held or beneficially owned by the Recipient Participant for an
     amount equal to [*] of the fair market value of the Shares of the Recipient
     Participant (the "Buyout Option").

20.5 The Proposing Participant shall notify the Recipient Participant of the
     exercise of the Buyout Option, no later than 30 business days prior to the
     proposed exercise thereof, by delivering written notice to the Recipient
     Participant stating that the Buyout Option is exercised and the price at
     which the Proposing Participant is willing to purchase the Shares of the
     Recipient Participant.

20.6 In the event that the Participants do not agree upon a purchase price for
     the Shares within five Business Days following the receipt by the Recipient
     Participant of written notice from the Proposing Participant pursuant to
     Clause 20.5 above, the Proposing Participant may contact the AAA, sitting
     in New York City and request that an independent US-based arbitrator who is
     knowledgeable of the pharmaceutical/biotechnology industry be appointed
     within 10 Business Days.  The AAA shall endeavor to select an arbitrator
     who is technically knowledgeable in the pharmaceutical/biotechnology
     industry (and who directly and through his affiliates, has no business
     relationship with, or shareholding in, either the Proposing Participant or
     the Recipient Participant).  Promptly upon being notified of the
     arbitrator's appointment, the Proposing Participant and the Recipient
     Participant shall submit to the arbitrator details of their assessment of
     the fair market value for the Shares of the Recipient Participant together
     with such information as they think necessary to validate their assessment.
     The arbitrator shall notify the Recipient Participant of [*] of the fair
     market value assessed by the Proposing Participant (the "Proposing
     Participant Price") and shall notify the Proposing Participant of [*] of
     the fair market value assessed by the Recipient Participant (the "Recipient
     Participant Price"). The Proposing Participant and the Recipient
     Participant shall then be entitled to make further submissions to the
     arbitrator within five Business Days explaining why the Recipient
     Participant Price or the Proposing Participant Price, as the case may be,
     is unjustified. The arbitrator shall thereafter meet with the Proposing
     Participant and the
                                       36


       Recipient Participant and shall thereafter choose either the Recipient
       Participant Price or the Proposing Participant Price (but not any other
       price) as the purchase price for the Shares (the "Purchase Price") on the
       basis of which price the Expert determines to be closer to [*] of the
       fair market value for the Shares of the Recipient Participant. The
       arbitrator shall use his best efforts to determine the Purchase Price
       within 30 Business Days of his appointment. The Proposing Participant and
       the Recipient Participant shall bear the costs of the arbitrator equally
       provided that the arbitrator may, in his discretion, allocate all or a
       portion of such costs to one Party. Any decision of the arbitrator shall
       be final and binding.

20.7   The Proposing Participant shall purchase the Shares of the Recipient
       Participant by delivery of the Purchase Price in cash no later than the
       15th Business Day following determination of the Purchase Price by the
       Expert.

20.8   The Shares of the Recipient Participant so transferred shall be sold by
       the transferor as beneficial owner with effect from the date of such
       transfer free from any lien, charge or encumbrance with all rights and
       restrictions attaching thereto. If the Proposing Participant elects to
       purchase the Shares of the Recipient Participant, the Shares of the
       Recipient Participant shall be sold by the Recipient Participant as
       beneficial owner for a price equal to [*] of the Purchase Price with
       effect from the date specified by the Proposing Participant in its notice
       of election free from any lien, charge or encumbrance together with all
       rights attaching thereto.

20.9   If the Proposing Participant exercises the Buyout Option, both parties
       will negotiate in good faith to agree to additional reasonable provisions
       and/or amendments to the License Agreements to protect the intellectual
       property rights of the Recipient Party.

20.10  If either Participant commits a Relevant Event, the other Shareholder
       shall have in addition to all other legal and equitable rights and
       remedies hereunder, the right to terminate this Agreement upon 30 days'
       written notice.

20.11  In the event of a termination of the Elan License Agreement and/or the
       RPI License Agreement, both parties will negotiate in good faith to
       determine whether this Agreement should be terminated and if so, which
       provisions should survive termination.

20.12  The provisions of Clauses 1, 3, 5.1, 9, 10, 11, 12, 17, 20.12, 22, 23,
       and 24 shall survive the termination of this Agreement under this Clause
       20.10 or by mutual consent pursuant to Clause 20.1 in accordance with
       their terms; all other terms and provisions of this Agreement shall cease
       to have effect and be null and void upon the termination of this
       Agreement under this Clause 20.10 or by mutual consent pursuant to Clause
       20.1.

                                       37


                                   CLAUSE 21

                                  SHARE RIGHTS

21.1   The Shareholders agree that the Common Shares and the Preferred Shares
       shall be separate classes of shares and shall carry the respective rights
       and be subject to the restrictions on the transfer and distribution of
       assets provided in the Newco Memorandum of Association and Bye-laws and
       as set forth in this Agreement.

21.2   Except as otherwise provided in the Bermuda Companies Act of 1981 and in
       the Newco Memorandum of Association and Bye-Laws, the Participants agree
       that for a period of two years from the Closing, the Preferred Shares
       issued to EIS shall not carry voting rights in Newco.


                                   CLAUSE 22

                                CONFIDENTIALITY

22.1   The Parties acknowledge and agree that it may be necessary, from time to
       time, to disclose to each other confidential and/or proprietary
       information, including without limitation, inventions, works of
       authorship, trade secrets, specifications, designs, data, know-how and
       other information, relating to the Field, the Products, present or future
       products, the Newco Intellectual Property, the Elan Intellectual Property
       or the RPI Intellectual Property, as the case may be, methods, compounds,
       research projects, work in process, services, sales suppliers, customers,
       employees and/or business of the disclosing Party, whether in oral,
       written, graphic or electronic form (collectively "Confidential
       Information").

22.2   Any Confidential Information revealed by a Party to another Party shall
       be maintained as confidential and shall be used by the receiving Party
       exclusively for the purposes of fulfilling the receiving Party's rights
       and obligations under this Agreement and the License Agreements, and for
       no other purpose. Confidential Information shall not include:

       22.2.1 information that is generally available to the public;

       22.2.2 information that is made public by the disclosing Party;

       22.2.3 information that is independently developed by the receiving
              Party, as evidenced by such Party's records, without the aid,
              application or use of the disclosing Party's Confidential
              Information;

       22.2.4 information that is published or otherwise becomes part of the
              public domain without any disclosure by the receiving Party, or on
              the part of the receiving Party's directors, officers, agents,
              representatives or employees;

                                       38


     22.2.5 information that becomes available to the receiving Party on a non-
            confidential basis, whether directly or indirectly, from a source
            other than the disclosing Party, which source did not acquire this
            information on a confidential basis; or

     22.2.6 information which the receiving Party is required to disclose
            pursuant to:

            (i)  a valid order of a court or other governmental body or any
                 political subdivision thereof or as otherwise required by law,
                 rule or regulation; or

            (ii) other requirement of law;

                 provided, however, that if the receiving Party becomes legally
                 required to disclose any Confidential Information, the
                 receiving Party shall give the disclosing Party prompt notice
                 of such fact so that the disclosing Party may obtain a
                 protective order or confidential treatment or other appropriate
                 remedy concerning any such disclosure. The receiving Party
                 shall fully co-operate with the disclosing Party in connection
                 with the disclosing Party's efforts to obtain any such order or
                 other remedy. If any such order or other remedy does not fully
                 preclude disclosure, the receiving Party shall make such
                 disclosure only to the extent that such disclosure is legally
                 required; or

     22.2.7 information which was already in the possession of the receiving
            Party at the time of receiving such information, as evidenced by its
            records, provided such information was not previously provided to
            the receiving party from a source which was under an obligation to
            keep such information confidential; or

     22.2.8 information that is the subject of a written permission to disclose,
            without restriction or limitation, by the disclosing Party.

22.3 Each Party agrees to disclose Confidential Information of another Party
     only to those employees, representatives and agents requiring knowledge
     thereof in connection with their duties directly related to the fulfilling
     of the Party's obligations under this Agreement, so long as such persons
     are under an obligation of confidentiality no less stringent than as set
     forth herein.  Each Party further agrees to inform all such employees,
     representatives and agents of the terms and provisions of this Agreement
     and their duties hereunder and to obtain their consent hereto as a
     condition of receiving Confidential Information.  Each Party agrees that it
     will exercise the same degree of care and protection to preserve the
     proprietary and confidential nature of the Confidential Information
     disclosed by a Party, as the receiving Party would exercise to preserve its
     own Confidential Information.  Each Party agrees that it will, upon request
     of another Party, return all documents and any copies thereof containing
     Confidential Information belonging to or disclosed by such other Party.
     Each Party shall promptly notify the other Parties upon discovery of any
     unauthorized use or disclosure of the other Parties' Confidential
     Information.

                                       39


22.4 Notwithstanding the above, each Party may use or disclose Confidential
     Information disclosed to it by another Party to the extent such use or
     disclosure is reasonably necessary in filing or prosecuting patent
     applications, prosecuting or defending litigation, complying with patent
     applications, prosecuting or defending litigation, complying with
     applicable governmental regulations or otherwise submitting information to
     tax or other governmental authorities, conducting clinical trials, or
     granting a permitted sub-license or otherwise exercising its rights
     hereunder; provided, that if a Party is required to make any such
     disclosure of the other Party's Confidential Information, other than
     pursuant to a confidentiality agreement, such Party shall inform the third
     party recipient of the terms and provisions of this Agreement and their
     duties hereunder and shall obtain their consent hereto as a condition of
     releasing to the third party recipient the Confidential Information.

22.5 Any breach of this Clause 22 by any employee, representative or agent of a
     Party is considered a breach by the Party itself.

22.6 The provisions relating to confidentiality in this Clause 22 shall remain
     in effect during the Term and for a period of seven years following the
     termination of this Agreement.

22.7 The Parties agree that the obligations of this Clause 22 are necessary and
     reasonable in order to protect the Parties' respective businesses, and each
     Party expressly agrees that monetary damages would be inadequate to
     compensate a Party for any breach by the other Party of its covenants and
     agreements set forth herein.  Accordingly, the Parties agree and
     acknowledge that any such violation or threatened violation will cause
     irreparable injury to a Party and that, in addition to any other remedies
     that may be available, in law or in equity or otherwise, any Party shall be
     entitled to obtain injunctive relief against the threatened breach of the
     provisions of this Clause 22, or a continuation of any such breach by the
     other Party, specific performance and other equitable relief to redress
     such breach together with its damages and reasonable counsel fees and
     expenses to enforce its rights hereunder, without the necessity of proving
     actual or express damages.


                                   CLAUSE 23

                                     COSTS

23.1 Each Shareholder shall bear its own legal and other costs incurred in
     relation to preparing and concluding this Agreement and the Substantive
     Documents.

23.2 All other costs, legal fees, registration fees and other expenses relating
     to the transactions contemplated hereby, including the costs and expenses
     incurred in relation to the incorporation of Newco, shall be borne by
     Newco.



                                       40


                                   CLAUSE 24

                                    GENERAL

24.1 Good Faith:
     ----------

     Each of the Parties hereto undertakes with the others to do all things
     reasonably within its power that are necessary or desirable to give effect
     to the spirit and intent of this Agreement.

24.2 Further Assurance:
     -----------------

     At the request of any of the Parties, the other Party or Parties shall (and
     shall use reasonable efforts to procure that any other necessary parties
     shall) execute and perform all such documents, acts and things as may
     reasonably be required subsequent to the signing of this Agreement for
     assuring to or vesting in the requesting Party the full benefit of the
     terms hereof.

24.3 No Representation:
     -----------------

     Each of the Parties hereto hereby acknowledges that in entering into this
     Agreement it has not relied on any representation or warranty except as
     expressly set forth herein or in any document referred to herein.

24.4 Force Majeure:
     -------------

     Neither Party to this Agreement shall be liable for delay in the
     performance of any of its obligations hereunder if such delay is caused by
     or results from causes beyond its reasonable control, including without
     limitation, acts of God, fires, strikes, acts of war (whether war be
     declared or not), insurrections, riots, civil commotions, strikes, lockouts
     or other labor disturbances or intervention of any relevant government
     authority, but any such delay or failure shall be remedied by such Party as
     soon as practicable.

24.5 Relationship of the Parties:
     ---------------------------

     Nothing contained in this Agreement is intended or is to be construed to
     constitute Elan/EIS and RPI as partners, or Elan/EIS as an employee or
     agent of RPI, or RPI as an employee or agent of Elan/EIS.

     No Party hereto shall have any express or implied right or authority to
     assume or create any obligations on behalf of or in the name of another
     Party or to bind another Party to any contract, agreement or undertaking
     with any third party.

                                       41


24.6 Counterparts:
     ------------

     This Agreement may be executed in any number of counterparts, each of which
     when so executed shall be deemed to be an original and all of which when
     taken together shall constitute this Agreement.

24.7 Notices:
     -------

     Any notice to be given under this Agreement shall be sent in writing by
     registered or recorded delivery post or reputable overnight courier such as
     Federal Express or telecopied to:

     Elan/EIS at:

     Elan Corporation, plc
     C/o Elan International Services, Ltd.
     102 St. James Court
     Flatts, Smiths FL04
     Bermuda
     Attention:     President
     Telephone:     441-292-9169
     Fax:           441-292-2224

     and

     Elan International Services, Ltd.
     102 St. James Court
     Flatts, Smiths FL04
     Bermuda
     Attention:     President
     Telephone:     441-292-9169
     Fax:           441-292-2224

     RPI at:

     Ribozyme Pharmaceuticals Incorporated
     2950 Wilderness Place
     Boulder, Colorado 80301
     Attention:     Chief Executive Officer
     Telephone      303-449-6500
     Fax:           303-449-6995

     with a copy to:

     Rothgerber Johnson & Lyons LLP
     One Tabor Center, Suite 3000

                                       42


          1200 Seventeenth Street
          Denver, Colorado 80202
          Attention:     Woody Davis, Esq.
          Telephone      303-623-9000
          Fax:           303-623-9222


          Newco at:

          Medizyme Pharmaceuticals Ltd.
          102 St. James Court
          Clarendon House
          Church St.
          Hamilton, Bermuda
          Attention:     Secretary
          Telephone:     441-295-1422
          Fax:           441-292-4720


          or to such other address(es) as may from time to time be notified by
          any Party to the others hereunder.

          Any notice sent by mail shall be deemed to have been delivered within
          three Business Days after dispatch or delivery to the relevant courier
          and any notice sent by telecopy shall be deemed to have been delivered
          upon confirmation of receipt. Notices of change of address shall be
          effective upon receipt. Notices by telecopy shall also be sent by
          another method permitted hereunder.

24.8      Governing Law; Arbitration
          --------------------------

24.8.1.   This Agreement shall be governed by and construed in accordance with
          the laws of the State of New York, without giving effect to the
          provisions thereof relating to the conflict of laws.

24.8.2.   The Parties will attempt in good faith to resolve any dispute arising
          out of or relating to this Agreement promptly by negotiation between
          executives of the Parties. In the event that such negotiations do not
          result in a mutually acceptable resolution, the Parties agree to
          consider other dispute resolution mechanisms including mediation.

24.8.3    Any dispute under this Agreement which is not settled by mutual
          consent under Clause 24.8.2 and which relates to (i) the
          interpretation or enforcement of any provision of this Agreement or
          the License Agreements, (ii) the interpretation or application of law,
          or (iii) the ownership of any intellectual property, shall be finally
          settled by binding arbitration, conducted in accordance with the
          Commercial Arbitration Rules of the American Arbitration Association
          by one arbitrator appointed in accordance with said rules. Such


                                       43


          arbitrator shall be reasonably satisfactory to each of the Parties;
          provided, that if the Parties are unable to agree upon the identity of
          such arbitrator within 15 days of demand by either Party, then either
          Party shall have the right to request the AAA to appoint the
          arbitrator. Such arbitrator shall be an independent expert in
          pharmaceutical product development and marketing (including clinical
          development and regulatory affairs).

          The arbitration shall be held in New York, New York.

          The arbitrator shall determine what discovery will be permitted,
          consistent with the goal of limiting the cost and time which the
          Parties must expend for discovery; provided the arbitrator shall
          permit such discovery as they deem necessary to permit an equitable
          resolution of the dispute.

          Any written evidence originally in a language other than English shall
          be submitted in English translation accompanied by the original or a
          true copy thereof.

          The costs of the arbitration, including administrative and
          arbitrators' fees, shall be shared equally by the Parties and each
          Party shall bear its own costs and attorneys' and witness' fees
          incurred in connection with the arbitration.

          In rendering judgment, the arbitrators may not provide for punitive or
          similar exemplary damages.

          A disputed performance or suspended performances pending the
          resolution of the arbitration must be completed within 30 days
          following the final decision of the arbitrators or such other
          reasonable period as the arbitrators determine in a written opinion.

          Any arbitration under this Agreement shall be completed within one
          year from the filing of notice of a request for such arbitration.

          The arbitration proceedings and the decision shall not be made public
          without the joint consent of the Parties and each Party shall maintain
          the confidentiality of such proceedings and decision unless otherwise
          permitted by the other Party.

          The Parties agree that the decision shall be the sole, exclusive and
          binding remedy between them regarding any and all disputes,
          controversies, claims and counterclaims presented to the arbitrators.
          Application may be made to any court having jurisdiction over the
          Party (or its assets) against whom the decision is rendered for a
          judicial recognition of the decision and an order of enforcement.


24.9      Severability:
          ------------

                                       44


          If any provision in this Agreement is agreed by the Parties to be,
          deemed to be or becomes invalid, illegal, void or unenforceable under
          any law that is applicable hereto, such provision will be deemed
          amended to conform to applicable laws so as to be valid and
          enforceable or, if it cannot be so amended without materially altering
          the intention of the Parties, it will be deleted, with effect from the
          date of such agreement or such earlier date as the Parties may agree,
          and the validity, legality and enforceability of the remaining
          provisions of this Agreement shall not be impaired or affected in any
          way.

24.10     Amendments:
          ----------

          No amendment, modification or addition hereto shall be effective or
          binding on any Party unless set forth in writing and executed by a
          duly authorized representative of all Parties.

24.11     Waiver:
          ------

          No waiver of any right under this Agreement shall be deemed effective
          unless contained in a written document signed by the Party charged
          with such waiver, and no waiver of any breach or failure to perform
          shall be deemed to be a waiver of any future breach or failure to
          perform or of any other right arising under this Agreement.

24.12     Assignment:
          ----------

          None of the Parties shall be permitted to assign its rights or
          obligations hereunder without the prior written consent of the other
          Parties except as follows:

          24.12.1   Elan, EIS and/or RPI shall have the right to assign their
                    rights and obligations hereunder to their Affiliates
                    provided, however, that such assignment does not result in
                    adverse tax consequences for any other Parties.

          24.12.2   Elan and EIS shall have the right to assign their rights and
                    obligations hereunder to a special purpose financing or
                    similar entity established by Elan or EIS.

24.13     Whole Agreement/No Effect on Other Agreements:
          ---------------------------------------------

          This Agreement (including the Schedules attached hereto) and the
          Substantive Documents set forth all of the agreements and
          understandings between the Parties with respect to the subject matter
          hereof, and supersedes and terminates all prior agreements and
          understandings between the Parties with respect to the subject matter
          hereof. There are no agreements or understandings with respect to the
          subject matter hereof, either oral or written, between the Parties
          other than as set forth in this Agreement and the Substantive
          Documents.

          In the event of any ambiguity or conflict arising between the terms of
          this Agreement and those of the Newco Memorandum of Association and
          Bye-Laws, the terms of this Agreement shall prevail.

                                       45


          No provision of this Agreement shall be construed so as to negate,
          modify or affect in any way the provisions of any other agreement
          between any of the Parties unless specifically referred to, and solely
          to the extent provided herein. In the event of a conflict between the
          provisions of this Agreement and the provisions of the License
          Agreements, the terms of this Agreement shall prevail unless this
          Agreement specifically provide otherwise.

24.14     Successors:
          ----------

          This Agreement shall be binding upon and inure to the benefit of the
          Parties hereto, their successors and permitted assigns.

                                       46


IN WITNESS WHEREOF, the Parties hereto have caused their duly authorized
representatives to execute this Agreement on the day first set forth above.

                                             SIGNED


                                             BY:_______________________

                                             for and on behalf of
                                             ELAN CORPORATION, PLC


in the presence of:__________________


                                             SIGNED


                                             BY:_______________________

                                             for and on behalf of
                                             ELAN INTERNATIONAL SERVICES, LTD.


in the presence of:__________________


                                             SIGNED


                                             BY:_______________________

                                             for and on behalf of
                                             ELAN PHARMA INTERNATIONAL LIMITED


in the presence of:__________________

                                       47


                                             SIGNED

                                             BY:_______________________

                                             for and on behalf of
                                             RIBOZYME PHARMACEUTICALS, INC.
in the presence of:__________________


                                             SIGNED

                                             BY:_______________________

                                             for and on behalf of
                                             MEDIZYME PHARMACEUTICALS LTD

in the presence of:__________________

                                       48


                                  SCHEDULE 1


                            ELAN LICENSE AGREEMENT

                                       49


                                  SCHEDULE 2


                             RPI LICENSE AGREEMENT

                                       50