RIBOZYME PHARMACEUTICALS INC
SB-2/A, 1997-09-15
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1





   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 15, 1997
    

   
                                                    REGISTRATION NO. 333-34981
    

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

   
                               Amendment No. 1 to
    
                                   FORM SB-2
                          REGISTRATION STATEMENT UNDER
                           THE SECURITIES ACT OF 1933

                         RIBOZYME PHARMACEUTICALS, INC.
             (Exact name of registrant as specified in its charter)



<TABLE>
<S>                              <C>                           <C>
           DELAWARE                          2834                    34-1697351
(State or other jurisdiction of  (Primary Standard Industrial    (I.R.S.  Employer
incorporation or organization)   Classification Code Number)   Identification Number)
</TABLE>

                             2950 WILDERNESS PLACE
                            BOULDER, COLORADO 80301
                                 (303) 449-6500
 (Address, including zip code, and telephone number, including area code, of
                  registrant's principal executive offices)

                         RALPH E. CHRISTOFFERSEN, PH.D.
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                         RIBOZYME PHARMACEUTICALS, INC.
                             2950 WILDERNESS PLACE
                            BOULDER, COLORADO 80301
                                 (303) 449-6500
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                                   Copies to:
                                         
      HERBERT H. DAVIS III, ESQ.                  STANTON D. WONG, ESQ.
         ROTHGERBER, APPEL,                         PILLSBURY MADISON
        POWERS & JOHNSON LLP                           & SUTRO LLP
           1200 17TH STREET                           P.O. BOX 7880
        DENVER, COLORADO 80202            SAN FRANCISCO, CALIFORNIA 94120-7880
            (303) 623-9000                           (415) 983-1000

        Approximate date of commencement of proposed sale to the public:
   AS SOON AS PRACTICABLE AFTER THE REGISTRATION STATEMENT BECOMES EFFECTIVE.

    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of earlier
effective registration statement for the same offering. [ ] ___

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ] ___

    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

   
    

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE
A FURTHER AMENDMENT THAT SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE
SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.


<PAGE>   2
 
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission. These securities may not be sold nor
     may offers to buy be accepted prior to the time the registration statement
     becomes effective. This prospectus shall not constitute an offer to sell or
     the solicitation of any offer to buy nor shall there be any sale of these
     securities in any State in which such offer, solicitation or sale would be
     unlawful prior to registration or qualification under the securities laws
     of any such State.
 
   
                SUBJECT TO COMPLETION, DATED SEPTEMBER 15, 1997
    
                                1,400,000 SHARES
 
                                   [RPI LOGO]

                                  COMMON STOCK
 
   
     All of the 1,400,000 shares of Common Stock offered hereby are being sold
on a "best efforts" basis by Ribozyme Pharmaceuticals, Inc. ("RPI" or the
"Company"). The Common Stock of the Company is listed on the Nasdaq National
Market under the symbol "RZYM." On September 11, 1997, the last reported sale
price of the Common Stock on the Nasdaq National Market was $8.88. See "Price
Range of Common Stock."
    
 
     THE SHARES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK. SEE "RISK 
FACTORS" BEGINNING ON PAGE 6 FOR A DISCUSSION OF CERTAIN FACTORS THAT SHOULD BE 
CONSIDERED BY PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED HEREBY.
 
                             ---------------------
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES 
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS 
       THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES 
          COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS 
             PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS 
                            A CRIMINAL OFFENSE.

<TABLE>
<CAPTION>
=============================================================================================================
                                           Price to                Placement               Proceeds to
                                            Public                  Fees(1)                 Company(2)
- -------------------------------------------------------------------------------------------------------------
<S>                                   <C>                      <C>                      <C> 
Per Share.........................         $                        $                        $

Total Maximum(3)..................    $                        $                        $
=============================================================================================================
</TABLE>
 
(1) The shares are being offered by the Company principally to selected
    institutional investors. Montgomery Securities (the "Placement Agent") has
    been retained to act, on a best efforts basis, as exclusive agent for the
    Company in connection with the arrangement of this transaction. The Company
    has agreed, among other things, (i) to pay the Placement Agent a fee in
    connection with the arrangement of this financing (which fee will be reduced
    by one-half with respect to the sale of shares to certain investors
    identified by the Company) and (ii) to indemnify the Placement Agent against
    certain liabilities, including liabilities under the Securities Act of 1933,
    as amended. See "Plan of Distribution."
 
(2) Before deducting expenses payable by the Company estimated at $350,000.
 
(3) There can be no assurance that any of the shares of Common Stock offered
    hereby will be sold. Since the offering is made on a best efforts basis,
    there is no firm commitment by the Placement Agent to purchase or sell any
    of the shares of Common Stock. There is no minimum number of shares of
    Common Stock required to be sold by the Company, and no arrangements have
    been made to escrow any proceeds of the offering. Therefore, the Company may
    sell less than all of the shares of Common Stock offered hereby, which may
    significantly reduce the amount of proceeds received by the Company.
 
     The shares of Common Stock offered hereby are being issued and sold
directly by the Company. It is expected that delivery of the certificates
representing the shares of Common Stock sold hereby will be made against payment
therefor at the office of Montgomery Securities.
 
                             ---------------------
 
                             MONTGOMERY SECURITIES
 
                                           , 1997
<PAGE>   3
                             AVAILABLE INFORMATION

         The Company is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in
accordance therewith files reports, proxy and information statements, and other
information with the Securities and Exchange Commission (the "Commission").
Such reports, proxy and information statements, and other information filed by
the Company can be inspected and copied at the public reference facilities
maintained by the Commission at 450 Fifth Street, N.W., Washington, D.C., as
well as the regional offices of the Commission located at Citicorp Center, 500
West Madison Street, Suite 1400, Chicago, Illinois, and 7 World Trade Center,
Suite 1300, New York, New York.  Copies of such material can be obtained from
the Public Reference Section of the Commission at 450 Fifth Street., N.W.,
Washington, D.C. 20549 at prescribed rates.  The Commission maintains a World
Wide Web site that contains reports, proxy and information statements, and
other information that are filed through the Commission's Electronic Data
Gathering, Analysis and Retrieval System.  This Web site can be accessed at
http://www.sec.gov.

         The Company has filed with the Commission a Registration Statement on
Form SB-2 (together with all amendments and exhibits thereto, the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities
Act"), with respect to the Common Stock offered hereby.  This Prospectus does
not contain all of the information set forth in the Registration Statement and
the exhibits and schedules thereto, certain parts of which are omitted in
accordance with the rules and regulations of the Commission. For further
information with respect to the Company and the Common Stock, reference is made
to the Registration Statement and the exhibits and schedules thereto.
Statements contained in this Prospectus as to the contents of any contract or
other document are not necessarily complete and, in each instance, reference is
made to the copy of such contract or document filed as an exhibit to the
Registration Statement, each such statement being qualified in all respects by
such reference.  Copies of the Registration Statement, including all exhibits
thereto, may be obtained from the Commission's principal office in Washington,
D.C. upon payment of the fees prescribed by the Commission, or may be examined
without charge at the offices of the Commission described above.





                                      2
<PAGE>   4
                               PROSPECTUS SUMMARY

         The following summary is qualified in its entirety by the more detailed
information and Financial Statements and Notes thereto appearing elsewhere in
this Prospectus.  Certain statements in this Prospectus constitute
"forward-looking statements" within the meaning of the Private Securities
Litigation Reform Act of 1995.  Such forward-looking statements involve known
and unknown risks, uncertainties and other factors which may cause the actual
results, performance or achievements of the Company, or industry results, to be
materially different from any future results, performance or achievements
expressed or implied by such forward-looking statements.  Such factors include,
among other things, the following:  general economic and business conditions;
competition; technological advances; ability to obtain rights to technology;
ability to obtain and enforce patents; ability to commercialize and manufacture
products; ability to obtain collaborators for its target validation programs;
ability to manufacture ribozymes in adequate amounts for its collaborations;
results of clinical studies; results of research and development activities;
business abilities and judgment of personnel; availability of qualified
personnel; changes in, or failure to comply with, governmental regulations;
ability to obtain adequate financing in the future; and other factors referenced
in this Prospectus. The shares of Common Stock offered hereby involve a high
degree of risk.  See "Risk Factors."

                                  THE COMPANY

         Ribozyme Pharmaceuticals, Inc. ("RPI" or the "Company") was founded to
capitalize on the broad potential of ribozymes for use in the development of
human therapeutics and therapeutic target validation services.  The Company's
technology is based on Professor Thomas R. Cech's discovery of "ribozymes," for
which he shared a Nobel Prize in 1989.  Ribozymes are a form of ribonucleic
acid ("RNA") that have the ability to selectively inhibit protein production.
Because many disease states are the result of abnormal protein production,
ribozymes are potentially applicable to a wide range of human diseases.  RPI
believes that its ribozyme technology may provide a new paradigm for drug
design and disease treatment and may be a significant tool for the
identification of gene function and target validation.  The Company has entered
into a collaboration with Chiron Corporation ("Chiron")  to develop ribozyme
products for specific therapeutic targets in human health, a second
collaboration with Chiron in the target validation area, and a collaboration
with Schering AG, Germany ("Schering") to validate new therapeutic targets from
gene sequence data using the Company's functional genomics technology.  The
Company has also licensed its technology to DowElanco for certain agricultural
applications and IntelliGene, Ltd. ("IntelliGene") for certain diagnostic
applications.

         The Company believes that its proprietary ribozyme technology platform
has the potential to address many of the issues associated with traditional
pharmaceuticals and drug discovery.  Ribozymes perform functions that are
different from those performed by ordinary RNA in that, after binding
selectively to their specific messenger RNA ("mRNA") target, ribozymes act
catalytically to cut, or cleave, the target mRNA molecule whereupon the mRNA is
destroyed.  Once the mRNA target is destroyed, the particular protein for which
the mRNA molecule carries information will not be produced, indicating that
ribozymes may be broadly applicable in the control of protein production or
gene expression. In general, the vast majority of diseases involve either
inappropriate expression of proteins or RNA viruses.  In addition, ribozymes
can be designed to select for a single specific target genetic sequence.  The
Company believes this highly selective mechanism of action has the potential to
minimize the side effects of its therapeutic products.  Also, because ribozymes
are not consumed in the act of cleaving the target mRNA, a single ribozyme may
cleave multiple targets, thus potentially leading to lower ribozyme dosing
requirements.

         RPI's business strategy is to utilize its ribozyme technology to
develop a new and novel class of human therapeutic products and a service
business for therapeutic target validation.  Additionally, RPI will continue to
seek partners to license the technology in areas such as agriculture, animal
health and diagnostics. The Company plans to develop therapeutic products
through both internal programs and collaborations. In addition to using
ribozymes to develop therapeutic products, RPI believes that its ribozyme
technology may be used as a drug discovery technology to characterize the
function of potential target genes.  Since ribozymes can be designed to select
for a single target genetic sequence, ribozymes may be used to identify the
function of that sequence.  As a result, links between gene dysfunction and
disease can be validated.  The Company has entered into collaborations with
Chiron and Schering to use the Company's ribozyme technology to determine the
function of selected genes and gene sequences, and plans to enter into
additional partnerships in this area in the future.



                                      3
<PAGE>   5
   
         The Company is working with Chiron on the development of a number of
products targeted at viral diseases, cancer, restenosis and ocular diseases. In
April 1996, RPI was granted National Institute of Health ("NIH") Recombinant DNA
Advisory Committee exemption for its proposed clinical trial of a retroviral
vector containing two ribozymes to treat blood progenitor cells from
HIV-infected individuals. In January 1997, RPI and collaborators received
approval of their Investigational New Drug Application with the U.S. Food and
Drug Administration, and a Phase I/IIa clinical trial was initiated in March
1997. The physician-sponsored study seeks first to demonstrate the safety of
reinfusion of the ribozyme containing cells and second to measure the ability of
ribozyme-expressing cells to engraft and survive after reinfusion into
HIV-infected patients. This study is part of a collaboration between RPI,
Chiron, the City of Hope, and Childrens Hospital in Los Angeles.  See
"Business--Product Development Programs" and "--Collaborative Relationships and
License Agreements."
    

         RPI believes that its patents and proprietary technology provide a
significant competitive advantage in the field of ribozymes.  At the core of
RPI's technology are inventions and patents of Dr. Cech and various of his
associates.  RPI believes that licenses to these patents and those filed by RPI
grant the Company the exclusive right to control the manufacture, use and sale
of ribozymes and any products that incorporate ribozymes.

         Ribozyme Pharmaceuticals, Inc. was incorporated in Delaware in 1992.
The Company's executive offices are located at 2950 Wilderness Place, Boulder,
Colorado, 80301, and its telephone number is (303) 449-6500.


                                RISK FACTORS

  The Common Stock offered hereby involves a high degree of risk.  See "Risk
                                   Factors."

<TABLE>
<CAPTION>
<S>                                                                                  <C>                                       
                                                           THE OFFERING
Common Stock to be offered......................................................     1,400,000 shares
Common Stock to be outstanding
  after the offering............................................................     8,602,392 shares(1)
Use of proceeds  ...............................................................     For research and development, working capital 
                                                                                     and  other general corporate purposes
Nasdaq National Market symbol...................................................     RZYM
</TABLE>

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

(1)      Based upon shares outstanding as of August 22, 1997.  Does not include
         (i) 910,462 shares of Common Stock issuable upon exercise of stock
         options outstanding as of August 22, 1997, or (ii) 487,458 shares of
         Common Stock issuable upon exercise of warrants outstanding as of
         August 22, 1997. See "Capitalization," "Management--Stock Option
         Plan," "Certain Transactions" and "Description of Capital
         Stock--Warrants."




                                      4
<PAGE>   6

                             SUMMARY FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

   
<TABLE>
<CAPTION>
                                             
                                  PERIOD FROM
                                  JANUARY 27,
                                      1992                                                            SIX MONTHS ENDED
                                  (INCEPTION)               YEAR ENDED DECEMBER 31,                       JUNE 30,
                                       TO      ---------------------------------------------       -------------------- 
                                      1992       1993       1994         1995        1996           1996         1997
                                      ----     -------     -------     -------     --------        ------       -------
 <S>                               <C>         <C>         <C>         <C>        <C>             <C>          <C>
STATEMENT OF OPERATIONS DATA:
 Total revenues...............     $    358    $   1,191   $ 1,587     $  1,675    $   1,709       $  1,111     $ 1,279
 Costs and expenses:
  Research and development....        3,091        6,990     9,212       12,204       14,189          7,666       6,154
  General and administrative..          591        1,047     1,291        1,397        1,943          1,152         822
  Interest expense............           28          187       334          554          845            449         437
                                   --------    ---------   -------     --------    ---------       --------     -------
       Total costs and                3,710        8,224    10,837       14,155       16,977          9,267       7,413
                                   --------    ---------   -------     --------    ---------       --------     -------
Net loss......................     $ (3,352)   $  (7,033)  $(9,250)    $(12,480)   $ (15,268)      $ (8,156)    $(6,134)
Net loss and pro forma net 
 loss per share(1)............     $  (2.13)   $   (2.87)  $ (3.52)    $  (3.86)   $   (2.61)      $  (1.72)    $ (0.87)
Shares used in computing net
 loss and pro forma net loss 
 per share(1).................        1,574        2,453     2,627        3,230        5,845          4,731       7,038


                                                                                                       JUNE 30, 1997
                                                                                                ----------------------------
                                                                                                 ACTUAL         AS ADJUSTED (2)
                                                                                                -------         ------------
BALANCE SHEET DATA:
  Cash, cash equivalents and securities available-for-sale................................     $ 13,269           $  24,769
  Working capital.........................................................................       11,678              23,178
  Total assets............................................................................       21,165              32,665
  Accumulated deficit.....................................................................      (53,518)            (53,518)
  Total stockholders' equity..............................................................       16,948              28,448
</TABLE>
    

- ----------------
   
(1)      See Note 1 of Notes to Financial Statements for information concerning
         the computation of net loss and pro forma net loss per share.
    

   
(2)      Adjusted to reflect the sale of 1,400,000 shares of Common Stock by
         the Company offered hereby at an assumed public offering price at
         $8.88 per share and receipt of the estimated net proceeds therefrom.  
         See "Use of Proceeds" and "Capitalization."
    




                                      5
<PAGE>   7
                                  RISK FACTORS

         An investment in the shares of Common Stock offered hereby involves a
high degree of risk.  Prospective investors should carefully consider, in
addition to the information set forth elsewhere in this Prospectus, the
following risk factors in evaluating the Company and the Common Stock offered
hereby.

         Except for the historical information contained herein, the discussion
in this Prospectus contains forward-looking statements that involve risks and
uncertainties.  The Company's actual results could differ materially from those
discussed herein.  Factors that could cause or contribute to such differences
include, but are not limited to, those discussed below and in the sections
entitled "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and "Business," as well as those discussed elsewhere in
this Prospectus.


EARLY STAGE OF DEVELOPMENT

         RPI is at a very early stage of development and must be evaluated in
light of the uncertainties and complications present in an early stage
biotechnology company.  Since the Company's inception in 1992, substantially
all of the Company's resources have been dedicated to the research and
development of potential products and services based on ribozyme technology.
Therapeutic products, if any, resulting from the Company's research and
development programs are not expected to be commercially available for a
substantial number of years.  No revenues have been generated from product
sales to date.  There can be no assurance that any therapeutic products will be
successfully developed and proven to be safe and effective.  The development of
new products and services is highly uncertain and subject to a number of
significant risks.  There can be no assurance that any of the Company's product
development efforts or those of its collaborators and licensees will be
successfully completed, that regulatory approvals will be obtained or will be
as broad as sought, that any of the Company's potential products will be
capable of being produced in commercial quantities at reasonable cost or that
any products or services, if introduced, will achieve market acceptance.


TECHNOLOGICAL UNCERTAINTY

         Drug discovery and development methods based upon ribozymes are
relatively new, and there can be no assurance that these methods will lead to
the discovery or development of commercial pharmaceutical products, that the
Company will be able to employ these methods of drug development successfully,
or that ribozyme products will be deliverable, safe or efficacious in humans.
While the Company has demonstrated the utility of ribozyme technology in model
systems in vitro and in animals, and has identified a number of ribozymes
worthy of additional testing, none of these potential products nor, to the
Company's knowledge, any other ribozyme-based compound has been shown to be
efficacious in humans.  A significant amount of additional research and
development, requiring many years and substantial resources, will be required
to determine the potential of the Company's ribozyme technology for therapeutic
products.  The Company's technology may, during the course of further research,
prove to be ineffective in the treatment of human disease or in other areas.
The Company must conduct significant additional research and development on
determining safe and effective methods of delivering ribozymes into the human
body for each indication for the Company's potential therapeutic products, and
must overcome a number of other technological challenges, such as enhancing the
delivery activity and stability of ribozymes and manufacturing ribozyme-based
therapeutic products on a commercial scale.  In particular, a significant
amount of additional research and development is required to determine whether
ribozymes can be delivered effectively in vivo, including research and
development directed toward improving the delivery of ribozymes to specific
tissues and improving cellular uptake.  There can be no assurance that
effective delivery of ribozyme-based products can be achieved.  In addition,
the Company's use of vector delivery of ribozymes will require that the Company
overcome concerns relating to potential serious side effects associated with
vector delivery, such as mutagenicity (permanent DNA alteration).  Many of
these technological and developmental challenges may be significantly greater
than those typically associated with traditional drug development, and may
never be overcome.  The use of ribozymes in animal health, agricultural
applications and therapeutic target validation is subject to similar
developmental and technological uncertainties which may never be overcome.
There can be no assurance that even if the Company's potential products are
found to be safe and effective, or otherwise have utility, that the Company
will be able to manufacture them on a large commercial scale or market them in
an economical way.  Further, it is possible that the




                                      6
<PAGE>   8
proprietary rights of third parties will preclude the Company or its
collaborators and licensees from marketing products or that third parties will
market superior or equivalent products.  As a result, there can be no assurance
that the Company's research and development activities will result in any
commercially viable products.


UNCERTAINTY OF PRODUCT DEVELOPMENT

         Before obtaining regulatory approval for the commercial sale of any of
its potential products the Company must demonstrate, through pre-clinical
studies and clinical trials or corresponding animal health or agricultural
studies, that a potential product is safe and efficacious for use in each
target indication. There can be no assurance that results generated by
pre-clinical animal testing will be indicative of results of clinical testing
in humans when, and if, those tests are conducted.  There can be no assurance
that potential products will be demonstrated to be safe and efficacious or will
receive necessary regulatory approvals.  The Company may also experience delays
from its anticipated commencement dates for human clinical trials due to a
variety of factors including pre-clinical study results, delays or difficulties
in patient enrollment, delays in regulatory approvals and other factors.  The
Company's potential products may prove to have undesirable and unintended side
effects or other characteristics that may prevent or limit their commercial
use.  In addition, there can be no assurance that any of the Company's
potential products will ultimately obtain United States Food and Drug
Administration ("FDA"), other regulatory or foreign marketing approval for any
indication, that an approved product will be capable of being produced in
commercial quantities at reasonable cost or that any approved product will
achieve market acceptance.


HISTORY OF OPERATING LOSSES

         RPI has experienced significant operating losses since its inception
in 1992.  As of June 30, 1997, the Company had an accumulated deficit of
approximately $53.5 million.  The Company expects to incur additional operating
losses over the next several years and expects cumulative losses to increase
substantially as the Company's research and development efforts and
pre-clinical and clinical testing expand.  The Company's revenues to date have
been derived primarily from payments under collaborative arrangements.  The
Company's ability to achieve profitability is dependent on its ability, alone
or with others, successfully to complete the development of products, conduct
clinical trials, obtain the required regulatory approvals and manufacture and
market products.  There can be no assurance as to if or when the Company will
achieve profitability.  See "Management's Discussion and Analysis of Financial
Condition and Results of Operations."


UNCERTAINTY OF PROTECTION OF PATENTS AND PROPRIETARY RIGHTS

         RPI's success will depend in part on its ability to obtain patents,
maintain trade secrets and operate without infringing on the proprietary rights
of others, both in the United States and other countries.  Patent matters in
biotechnology are highly uncertain and involve complex legal and factual
questions.  Accordingly, the breadth of claims allowed in biotechnology and
pharmaceutical patents cannot be predicted.  As of June 30, 1997, RPI held
exclusive rights to at least 25 issued United States patents and 7 issued
foreign patents.  In addition, as of June 30, 1997, RPI had on file
approximately 100 United States and related foreign applications. There can be
no assurance that the Company will develop products or processes that are
patentable, that patents will issue from any of these applications or that
claims allowed on issued patents will be sufficient to protect the Company's
technology.  There can be no assurance that the Company's issued patents or
patent applications, if issued, are enabled, will not be challenged,
invalidated or circumvented, or that the rights granted thereunder will provide
proprietary protection or competitive advantages to the Company.  Competitors
have filed applications, have been issued patents and may obtain additional
patents and proprietary rights relating to products or processes competitive
with those of the Company or which could affect the Company's issued patents or
efforts to obtain issued patents. Although the Company has filed patent
applications covering, among other things, a number of improvements and
modifications to ribozymes, the basic patents exclusively licensed to the
Company that cover the use of an enzymatic RNA to cleave a single stranded RNA
unless extended expire in 2008 in the United States and in 2007 in Europe.
There can be no assurance that any product developed by the Company or its
collaborators and licensees will be commercially available by the expiration
date of such patents.  Furthermore, changes in United States patent laws
resulted from the General Agreement on Tariffs and Trade (the "GATT
Agreement").  Most notably, the GATT Agreement resulted in United States law
being amended to change the term of patent protection, for certain patent
applications



                                      7
<PAGE>   9
filed after June 7, 1995, from 17 years from patent issuance to 20 years from
the earliest effective filing date of the application.  Because the time from
filing to issuance of biotechnology applications is often more than three
years, a 20-year patent term from the date of filing may result in a
substantially shortened term of patent protection, which may adversely affect
the Company's patent position.

         A number of pharmaceutical companies, biotechnology companies,
universities and research institutions have filed patent applications or
received issued patents relating to ribozymes.  The commercial success of the
Company will depend in part on RPI not infringing patents issued to competitors
and not breaching the technology licenses upon which any potential products are
based.  It is uncertain whether the issuance of any third-party patents would
require the Company to alter its products or processes, obtain licenses or
cease certain activities.  Some of these applications or patents may conflict
with the Company's issued patents or pending applications.  Further, RPI is
aware that other companies have filed patent applications and have been granted
patents in the United States and other countries claiming subject matter that
may be useful to the Company for some of its potential products.  Such conflict
could result in a significant reduction of the coverage of the Company's issued
or licensed patents.  In addition, if patents exist or are issued to other
companies which contain competitive or conflicting claims and such claims are
ultimately determined to be valid, the Company may be required to obtain
licenses to these patents or to develop or obtain alternative technology.  If
any licenses are required, there can be no assurance that the Company will be
able to obtain any such license on commercially favorable terms, if at all.  If
such licenses are not obtained, the Company might be prevented from pursuing
the development of certain of its potential products.  The Company's breach of
an existing license or failure to obtain a license to any technology that it
may require to commercialize its products may have a material adverse impact on
the Company. Litigation, interference proceedings in the United States Patent
and Trademark Office, oppositions in non-United States countries or
reexaminations, which could result in substantial costs to and diversion of
efforts by the Company, may also be necessary to enforce or defend any patents
issued or licensed to the Company or to determine the scope and validity of
third-party proprietary rights.  If competitors of the Company prepare and file
patent applications in the United States that claim technology also claimed by
the Company, the Company may have to participate in interference proceedings
declared by the United States Patent and Trademark Office to determine priority
of invention, which could result in substantial cost to the Company, even if
the eventual outcome is favorable to the Company.  The Company has filed
opposition documents against two patents granted to a competitor in Europe.
Opposition proceedings against certain  European and Japanese patents of the
Company have been initiated by its competitors.  In addition, interference
proceedings against certain of the Company's other patents and patent
applications are anticipated in the U.S.  There can be no assurance that the
Company's issued or licensed patents would be held valid by a court of
competent jurisdiction.  An adverse outcome could subject the Company to
significant liabilities to third parties, require disputed rights to be
licensed from third parties or require the Company to cease using such
technology.

         RPI relies on trade secrets to protect its technology in addition to
patent protection, especially where patent protection is not believed to be
appropriate or obtainable.  RPI attempts to protect its proprietary technology
and processes in part by confidentiality agreements and assignment of invention
agreements with its employees and confidentiality agreements with its
consultants, collaborators and licensees.  There can be no assurance that these
agreements will provide meaningful protection, that these agreements will not
be breached, that the Company would have adequate remedies for any breach, or
that the Company's trade secrets will not otherwise become known or be
independently discovered by competitors.  To the extent that the Company or its
consultants, collaborators or licensees use intellectual property owned by
others in their work for the Company, disputes may also arise as to the rights
in related or resulting know-how and inventions.  See "Business--Patents and
Proprietary Technology."


DEPENDENCE ON COLLABORATIVE RELATIONSHIPS

         The Company's strategy for the development, clinical testing,
manufacturing and commercialization of its potential products includes
collaborating with corporate partners, licensors, licensees and others and is
dependent upon the performance of responsibilities by these outside parties.
The Company is currently engaged in a number of corporate collaborations,
including product development and target validation service agreements and
technology licenses.  Although the Company believes its collaborators and
licensees and any future collaborators and licensees have or will have a
motivation to perform their contractual responsibilities, the amount and timing
of resources to be devoted to collaborative activities by the Company's
collaborators and licensees are not within the control of the Company.  There
can be no assurance that any collaborative relationship will be extended or
renewed, that the




                                       8
<PAGE>   10
Company's collaborators and licensees  will perform their obligations as
expected or that the Company will derive any additional revenue or other
benefits from such arrangements.  There can be no assurance that the Company's
current or future collaborators and licensees will not pursue existing or
alternative technologies in preference to those being developed in
collaboration with the Company. In particular, the Company is aware that Chiron
is conducting product development programs that may be competitive with certain
of the RPI/Chiron collaborative programs.  In addition, there can be no
assurance that the Company's collaborators and licensees will pay any
additional option or license fees to the Company or that they will develop and
market any products under the agreements.  The Company's collaboration with
Chiron provides that the parties will share equally in the development costs
and profits of any jointly developed product.  The Company will be required to
provide substantial funds to pay for its share of any such development costs,
and to the extent the Company is unwilling or unable to fund its share and
Chiron chooses to fund the entire development costs, the Company will forfeit
its interest in such product except for the right manufacture and  receive a
predetermined royalty.  There can be no assurance that Chiron will commit to
fund product development costs if the Company declines to participate.
Furthermore, there can be no assurance that the Company will be able to
negotiate additional collaborative arrangements in the future on acceptable
terms, if at all, or that such collaborative arrangements will be successful.
To the extent that the Company chooses not to or is unable to establish such
arrangements, it would require substantially greater capital to undertake
research, development and marketing of its proposed products at its own
expense.  In addition, the Company may encounter significant delays in
introducing its proposed products into certain markets or find that the
development, manufacture or sale of its proposed products in such markets is
adversely affected by the absence of such collaborative agreements.  See
"Business--Product Development Programs," "--Collaborative Relationships and
License Agreements," "--Manufacturing and Marketing Strategy" and "Certain
Transactions."


INTENSE COMPETITION; RAPID TECHNOLOGICAL CHANGE

         RPI is engaged in a rapidly changing, highly competitive field.  Other
products and therapies that may compete directly with the products that the
Company is seeking to develop and market currently exist or are being
developed.  Many other companies are actively seeking to develop products,
including ribozymes and other products designed to modulate gene expression,
such as antisense oligonucleotides, that have disease targets similar to those
being pursued by the Company.  Some of these competitive products are in
clinical trials.  There can be no assurance that the Company's competitors will
not succeed in developing products based on ribozyme or other technologies,
existing or new, that are more effective than any that are being developed by
the Company or that would render the Company's ribozyme technologies obsolete
and noncompetitive.  Moreover, there currently are commercially available
products for the treatment of certain disease targets being pursued by the
Company.

         Competition from fully integrated pharmaceutical and biotechnology
companies and more established biotechnology companies is intense and is
expected to increase.  Most of these companies have significantly greater
financial resources and expertise in research and development, manufacturing,
pre-clinical studies and clinical trials, obtaining regulatory approvals and
marketing than the Company.  Smaller companies may also prove to be significant
competitors, particularly through collaborative arrangements with large
pharmaceutical and biotechnology companies.  Many of these competitors have
products that have been approved or are in development and operate large, well
funded research and development programs.  Academic institutions, governmental
agencies and other public and private research organizations also conduct
research, seek patent protection and establish collaborative arrangements for
products and clinical development and marketing.  These companies and
institutions compete with the Company in recruiting and retaining highly
qualified scientific and management personnel.  In addition to the above
factors, RPI faces competition based on product efficacy, safety, the timing
and scope of regulatory approvals, availability of supply, marketing and sales
capability, reimbursement coverage, price and patent position.  There can be no
assurance that the Company's competitors will not develop more effective or
more affordable products, or achieve earlier patent protection or product
commercialization than the Company.  See "Business--Competition."




                                      9
<PAGE>   11
FUTURE CAPITAL NEEDS; UNCERTAINTY OF ADDITIONAL FUNDING

         Development of the Company's products will require a commitment of
substantial additional funds to conduct the costly and time consuming research,
pre-clinical and clinical testing necessary to bring its potential products to
market and to establish manufacturing and marketing capabilities.  The
Company's future capital requirements will depend on many factors, including,
among others, the progress of the Company's research, development and drug
discovery efforts, the ability of the Company to establish collaborative
arrangements for clinical testing, progress with pre-clinical studies and
clinical trials, the time and costs involved in obtaining regulatory approvals,
the costs involved in preparing, filing, prosecuting, maintaining, defending
and enforcing patent claims, competing technological and market developments,
changes in the Company's collaborative relationships, costs associated with the
acquisition of technology, if any, evaluation of the commercial viability of
the potential products, effective commercialization activities and
arrangements, and the cost and availability of third-party financing for
capital expenditures.  Based on current projections, the Company estimates that
its existing capital resources and the net proceeds from this offering,
together with facility and equipment financing and expected revenues from its
collaborations, will be sufficient to fund the Company's requirements until
mid-1999 (assuming that the Company exercises its option to defer paying the
costs of any Phase II or subsequent clinical trials conducted under its
collaboration with Chiron until after such date).  There can be no assurance
that the underlying assumed levels of revenue and expense will prove to be
accurate.  Whether or not these assumptions prove to be accurate, the Company
will need to raise substantial additional capital to fund its operations.  The
Company intends to seek such additional funding through collaborative
arrangements, public or private equity or debt financing, capital lease
transactions or other financing sources that may be available.  However, there
can be no assurance that additional financing will be available on acceptable
terms or at all.  If additional funds are raised through the sale of equity or
convertible debt securities, substantial dilution to existing stockholders may
result.  In the event that additional funds are obtained through arrangements
with collaborators and licensees, such arrangements may require the Company to
relinquish rights to certain of its technologies, product candidates or
products that the Company would otherwise seek to develop or commercialize
itself.  If adequate funds are not available, the Company may be required to
delay, reduce the scope of or eliminate one or more of its research or
development programs.  See "Use of Proceeds," "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and
"Business--Collaborative Relationships and License Agreements."


UNCERTAINTY OF GOVERNMENTAL REGULATION

         The FDA and comparable agencies in federal, state and local
jurisdictions and in foreign countries impose substantial requirements upon the
manufacturing and marketing of products such as those proposed to be developed
by the Company or its collaborators and licensees.  The process of obtaining
FDA and other required regulatory approvals is lengthy and expensive.  The time
required for FDA and other regulatory approvals is uncertain and typically
takes a number of years, depending on the type, complexity and novelty of the
product.  The Company or its collaborators and licensees may encounter
significant delays or excessive costs in their efforts to secure necessary
approvals or licenses.  Because certain of the products that may result from
the Company's research and development programs involve the application of new
technologies and will be based on a new therapeutic approach, such products may
be subject to substantial additional review by various governmental regulatory
authorities and as a result, regulatory approvals may be obtained more slowly
than for products using more conventional technologies.  There can be no
assurance that FDA and other regulatory approvals will be obtained in a timely
manner, if at all.  Any delay in obtaining, or the failure to obtain, such
approvals would adversely affect the Company's ability to generate product or
royalty revenues.  Even if FDA and other regulatory approvals are obtained, the
marketing and manufacturing of products are subject to continuing FDA and other
regulatory review, and later discovery of previously unknown problems with a
product, manufacturer or facility may result in restrictions on the product or
manufacturer, including withdrawal of the product from the market.  Additional
governmental regulations may be promulgated that could delay regulatory
approval of the Company's or a corporate partner's potential products.  The
Company cannot predict the impact of adverse governmental regulation which
might arise from future legislative or administrative action.  See
"Business--Government Regulation."



                                      10
<PAGE>   12
NEED TO ATTRACT AND RETAIN KEY EMPLOYEES AND CONSULTANTS

         The Company is highly dependent on its corporate officers and other
principal members of its scientific and management staff, the loss of any of
whose services might significantly delay or prevent the achievement of the
Company's research, development or business objectives.  In addition, the
Company relies on consultants and advisors, including the members of its
Scientific Advisory Board, to assist the Company in formulating its research
and development strategy.  Retaining and attracting qualified personnel,
consultants and advisors is critical to the Company's success.  In order to
pursue its product development and marketing plans, the Company may be required
to hire additional qualified scientific personnel to perform research and
development, as well as personnel with expertise in clinical testing,
government regulation, manufacturing, and marketing.  These requirements are
also expected to demand the addition of management personnel and the
development of additional expertise by existing management personnel.  The
Company faces competition for qualified individuals from numerous
pharmaceutical and biotechnology companies, universities and other research
institutions.  There can be no assurance that the Company will be able to
attract and retain such individuals on acceptable terms, if at all, and the
failure to do so could have a material adverse effect on the Company, including
its ability to conclude collaborations with additional collaborators and
licensees.  See "Management."


LACK OF MANUFACTURING EXPERIENCE; RELIANCE ON CONTRACT MANUFACTURERS

         The Company currently has manufacturing facilities to produce limited
quantities of some of its compounds for research and development, pre-clinical
and some clinical purposes.  The potential pharmaceutical products under
development by the Company and its collaborators and licensees have never been
manufactured on a commercial scale and there can be no assurance that such
products can be manufactured at a cost or in quantities necessary to make them
commercially viable.  If the Company or its collaborators or licensees is
unable to manufacture or contract for a sufficient supply of its potential
products on acceptable terms, or if it or they should encounter delays or
difficulties in its relationships with manufacturers, the Company and its
collaborators and licensees' pre-clinical and human clinical testing schedule
would be delayed, resulting in a delay in the submission of products for
regulatory approval or the market introduction and subsequent sales of such
products, which would have a material adverse effect on the Company.  Moreover,
if a vector delivery approach is required, a viral or non-viral vector that
contains the ribozyme must be obtained.  There can be no assurance that the
Company or its collaborators or licensees will be able to obtain licenses to,
or the appropriate manufacturing of, such a vector with sufficient quality and
quantity, and such potential difficulty would have a material adverse effect on
the Company.  Furthermore, RPI or contract manufacturers must adhere to current
Good Laboratory Practices and current Good Manufacturing Practices ("cGMP")
regulations enforced by the FDA through its facilities inspection program.  If
these facilities cannot pass a pre-approval plant inspection, the FDA
pre-market approval of the products will not be granted.  See
"Business--Manufacturing and Marketing Strategy."


LACK OF SALES AND MARKETING EXPERIENCE; DEPENDENCE ON THIRD PARTIES

         The Company currently has no sales, marketing or distribution
capability.  The Company intends to rely on relationships with pharmaceutical
and biotechnology companies with established distribution systems and direct
sales forces to market certain of its products and may decide to market other
products directly.  To market any of its products directly, the Company must
develop a marketing and sales force with technical expertise and with
supporting distribution capability.  There can be no assurance that the Company
will be able to establish in-house sales, marketing and distribution
capabilities or relationships with third parties, or that it will be successful
in gaining market acceptance for its products.  To the extent that the Company
enters into co-promotion or other licensing arrangements, any revenues received
by the Company will depend upon the efforts of third parties, and there can be
no assurance that such efforts will be successful.  See
"Business--Manufacturing and Marketing Strategy."


UNCERTAINTY OF PHARMACEUTICAL PRICING, THIRD-PARTY REIMBURSEMENT AND HEALTH
CARE REFORM MEASURES

         The business and financial condition of pharmaceutical and
biotechnology companies will continue to be affected by the efforts of
governmental and third party payors to contain or reduce the costs of health
care.  In the United States and in certain foreign jurisdictions there have
been, and the Company expects that there will continue to be, a number of
legislative and regulatory proposals aimed at changing the health care system.
While the




                                      11
<PAGE>   13
Company cannot predict whether any such legislative or regulatory proposals
will be adopted or the effect that such proposals may have on its business, the
pendency or approval of such proposals could have a material adverse effect on
the Company's ability to raise capital or to obtain additional collaborators or
licensees, and the adoption of such proposals could have a material adverse
effect on the Company.

         In both domestic and foreign markets, sales of the Company's potential
products will depend in part on the availability of reimbursement from
third-party payors such as government health administration authorities,
private health insurers and other organizations.  Third-party payors are
increasingly challenging the price and cost-effectiveness of medical products
and services.  Significant uncertainty exists as to the reimbursement status of
newly approved health care products.  Future legislation and regulations
affecting the pricing of pharmaceuticals could further limit reimbursement for
medical products and services.  There can be no assurance that any of the
Company's potential products will be considered cost effective or that adequate
third-party reimbursement would be available to enable RPI to maintain price
levels sufficient to realize an appropriate return on its investment in product
development.  In addition, the trend toward managed health care in the United
States and the concurrent growth of organizations, such as health maintenance
organizations, which could control or significantly influence the purchase of
health care services and products, as well as legislative proposals to reduce
government insurance programs, may all result in pricing pressure for any
products that might be developed by the Company.  See "Business--Government
Regulation."


RISK OF PRODUCT LIABILITY; POSSIBLE INABILITY TO OBTAIN INSURANCE

         The Company's business will expose it to potential product liability
risks that are inherent in the testing, manufacturing and marketing of human
therapeutic products.  The Company currently has no clinical trial liability
insurance and there can be no assurance that it will be able to obtain and
maintain such insurance for any of its clinical trials. In addition, there can
be no assurance that the Company will be able to obtain or maintain product
liability insurance in the future on acceptable terms or with adequate coverage
against potential liabilities.  An inability to obtain sufficient insurance
coverage at an acceptable cost or otherwise protect against potential product
liability claims could prevent or inhibit the commercialization of
pharmaceutical products developed by the Company or its collaborators and
licensees.  Further, the Company's collaborative agreement with Chiron requires
that the Company obtain certain insurance coverage in the future.  Failure to
obtain such coverage could result in a breach by the Company of such agreement,
which could give rise to rights of termination on the part of Chiron.  A
product liability claim or recall would have a material adverse effect on the
business and financial condition of the Company.


HAZARDOUS MATERIALS

         The Company's research and development involves the controlled use of
hazardous materials, chemicals and various radioactive compounds.  Although the
Company believes that its safety procedures for handling and disposing of such
materials comply with the standards prescribed by state and federal
regulations, the risk of accidental contamination or injury from these
materials cannot be completely eliminated.  In the event of such an accident,
the Company could be held liable for any damages that result and any such
liability could exceed the resources of the Company.  The Company may incur
substantial costs to comply with environmental regulations if the Company
develops manufacturing capacity.  See "Business--Government Regulation."


VOLATILITY OF STOCK PRICE; NO DIVIDENDS

         The market price of the shares of Common Stock, like that of the
common stock of many other early-stage biopharmaceutical companies, is highly
volatile.  Factors such as announcements of technological innovations or new
commercial products by the Company or its competitors, progress with clinical
trials, governmental regulation, changes in reimbursement policies,
developments in patent or other proprietary rights of the Company or its
competitors, including litigation, developments in the Company's relationships
with current or future collaborators and licensees, if any, public concern as
to the safety and efficacy of drugs developed by the Company and its
competitors, changes in estimates of the Company's performance by securities
analysts, fluctuations in the Company's operating results and general market
conditions may have a significant effect on the market price of the




                                      12
<PAGE>   14
Common Stock.  The Company has never paid any cash dividends and does not
anticipate paying cash dividends in the foreseeable future.  See "Dividend
Policy," and "Price Range of Common Stock."


SHARES ELIGIBLE FOR FUTURE SALE

         Sales of substantial amounts of Common Stock in the public market
following the offering made hereby could have an adverse effect on the price of
the Company's Common Stock.  Upon the closing of this offering approximately
5,996,801 shares (including the 1,400,000 shares sold in this offering) will be
eligible for immediate resale in the public market.  Additionally, upon
expiration or early termination of 90 day lockup agreements with Montgomery
Securities, 2,392,825 shares of Common Stock will be eligible for sale in the
public market, subject to the volume limitations of Rule 144 under the
Securities Act.  On May 9, 1998, 212,766 additional shares will be eligible for
sale pursuant to the provisions of Rule 144 under the Securities Act.  Certain
existing stockholders have rights under certain circumstances to require the
Company to register their shares for future sale.  See "Description of Capital
Stock--Registration Rights," and "Plan of Distribution."



DILUTION

         The public offering price is substantially higher than the net
tangible book value per share of Common Stock.  Investors purchasing shares of
Common Stock in this offering will therefore incur immediate and substantial
dilution.  Additional dilution will occur upon the exercise of outstanding
options with exercise prices below the public offering price.  See "Dilution."


ANTI-TAKEOVER CONSIDERATIONS

          The Board of Directors has the authority to issue up to 5,000,000
shares of preferred stock and to fix the price, rights, preferences, privileges
and restrictions, including voting rights, of those shares without any further
vote or action by the stockholders.  The rights of the holders of Common Stock
will be subject to, and may be adversely affected by, the rights of the holders
of any preferred stock that may be issued in the future.  The issuance of
preferred stock, while providing desirable flexibility in connection with
possible acquisitions and other corporate purposes, may have the effect of
delaying, deferring or preventing a change in control of the Company, may
discourage bids for the Common Stock at a premium over the market price of the
Common Stock and may adversely affect the market price of and the voting and
other rights of the holders of the Common Stock.  The Company has no present
plans to issue shares of preferred stock.  In addition, certain provisions of
the Company's Bylaws and of Delaware law applicable to the Company could have
the effect of discouraging certain attempts to acquire the Company which could
deprive the Company's stockholders of the opportunities to sell their shares of
Common Stock at prices higher than prevailing market prices.  See "Description
of Capital Stock."


CONTROL BY OFFICERS, DIRECTORS AND PRINCIPAL STOCKHOLDERS

         Following completion of this offering, directors, executive officers
and principal stockholders of the Company, and certain of their affiliates,
will beneficially own approximately 27.8% of the outstanding shares of Common
Stock.  Accordingly, these persons, individually and as a group, may be able to
effectively control the Company and direct its affairs and business, including
any determination with respect to the acquisition or disposition of assets by
the Company, future issuance's of Common Stock or other securities by the
Company, declaration of dividends on the Common Stock and the election of
directors.  Such concentration of ownership may also have the effect of
delaying, deferring or preventing a change in control of the Company.  See
"Principal Stockholders."




                                      13
<PAGE>   15
                                USE OF PROCEEDS

   
         The net proceeds to the Company from the sale of the  1,400,000 shares
of Common Stock offered by the Company hereby are estimated to be $11,500,000
after deducting the estimated placement fee and offering expenses.
    

         There can be no assurance that the Company will be successful in
selling any or all of the shares of Common Stock offered hereby.  The Company
has not fixed a minimum number of shares of Common Stock to be sold pursuant to
this offering.  Therefore, the Company may sell less than all of the shares of
Common Stock offered hereby, which may significantly reduce the amount of
proceeds received by the Company.

   
         The Company expects that approximately $10,500,000 of the aggregate
net proceeds of this offering will be used to fund the Company's research and
development efforts, including ongoing development of the Company's
technologies, pre-clinical and clinical testing and other costs associated with
the Company's pharmaceutical discovery and development programs.  The remainder
of the aggregate net proceeds will be used for working capital and general
corporate purposes.  The amounts actually expended for each purpose may vary
significantly depending upon a number of factors, including: the progress of
the Company's research, development and drug discovery efforts; the ability of
the Company to establish collaborative arrangements; progress with pre-clinical
studies and clinical trials; the time and costs involved in obtaining
regulatory approvals; the costs involved in preparing, filing, prosecuting,
maintaining, defending and enforcing patent claims; competing technological and
market developments; changes in the Company's collaborative relationships;
costs associated with the acquisition of technology, if any; evaluation of the
commercial viability of potential products; effective commercialization
activities and arrangements; and the cost and availability of third-party
financing for capital expenditures.  Based on current projections, the Company
estimates that its existing capital resources, the net proceeds from this
offering, together with facility and equipment financing and expected revenues
from its collaborations, will be sufficient to fund the Company's requirements
until mid-1999 (assuming that the Company exercises its option to defer paying
the costs of any Phase II or subsequent clinical trials conducted under its
collaboration with Chiron until after such date).  Pending such uses, the
Company intends to invest the aggregate net proceeds from this offering and
from Chiron in short-term, investment-grade, interest-bearing securities.  The
Company may also use a portion of such net proceeds to acquire or invest in
businesses, products and technologies that are complementary to those of the
Company, although no agreements have been entered into as of the date of this
Prospectus with respect to any such acquisition or investment. See
"Management's Discussions and Analysis of Financial Conditions and Results of
Operations--Liquidity and Capital Resources" and "Business--Collaborative
Relationships and License Agreements."
    




                                      14
<PAGE>   16
                                DIVIDEND POLICY

         The Company has never declared or paid cash dividends and currently
intends to retain any future earnings to finance the growth and development of
its business.  The Company's ability to pay dividends is restricted by the
terms of its tenant improvement, equipment loan facility agreements and its
line of credit with Schering.


                          PRICE RANGE OF COMMON STOCK

         The Company's Common Stock has been quoted on the Nasdaq National
Market under the symbol RZYM, since April 11, 1996.  The Company's initial
public offering price was $10.00 per share.  The following table sets forth,
for the fiscal periods indicated, the range of high and low sale prices per
share of the Common Stock as reported by the Nasdaq National Market.


   
<TABLE>
<CAPTION>
      1996                                                        High        Low
      ----                                                        ----        ---
      <S>                                                        <C>         <C>
      Second Quarter......................................       $21.25      $10.00
      Third Quarter.......................................        14.75        8.81
      Fourth Quarter......................................        13.13        8.38

      1997
      ----
      First Quarter.......................................       $16.50       $9.88
      Second Quarter......................................        12.38        8.63
      Third Quarter (to September 11, 1997)...............         9.75        7.38
</TABLE>
    

   
         As of August 22, 1997, there were 169 stockholders of record.  On
September 11, 1997, the last reported sale price of the Common Stock on the
Nasdaq National Market was $8.88 per share.
    




                                      15
<PAGE>   17
                                 CAPITALIZATION

   
         The following table sets forth the capitalization of the Company as of
June 30, 1997 and such capitalization as adjusted to reflect the sale of
1,400,000 shares of Common Stock offered hereby, at an assumed offering price
of $8.88 per share and receipt of the estimated net proceeds therefrom.  See
"Use of Proceeds."
    


   
<TABLE>
<CAPTION>
                                                                                          JUNE 30, 1997        
                                                                                     -------------------------
                                                                                                         AS
                                                                                      ACTUAL          ADJUSTED
                                                                                     ---------       ---------
                                                                                           (IN THOUSANDS)
<S>                                                                                   <C>           <C>
Long-term debt and capital lease obligations, net of
  current portion................................................................     $  2,149        $  2,149
                                                                                      --------        --------
Stockholders' equity:
  Preferred stock, $.01 par value; 5,000,000 shares
    authorized and no shares outstanding
    actual and pro forma as adjusted.............................................           --              --
  Common Stock, $.01 par value; 20,000,000 shares authorized
    and 7,193,819 shares outstanding actual and 8,593,819 shares
    outstanding pro forma as adjusted(1).........................................           72              86
  Additional paid-in capital.....................................................       70,591          82,077
  Deferred compensation and other................................................         (197)           (197)
                                                                                                              
  Accumulated deficit............................................................      (53,518)        (53,518)
                                                                                      --------        -------- 
    Total stockholders' equity...................................................       16,948          28,448
                                                                                      --------        --------
         Total capitalization....................................................     $ 19,097        $ 30,597
                                                                                      ========        ========
</TABLE>
    

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

(1)      Excludes as of June 30, 1997: (i) 910,462 shares of Common Stock
         issuable upon exercise of stock options outstanding as of August 22,
         1997 at a weighted average exercise price of approximately $9.36 per
         share, (ii) 487,458 shares of Common Stock issuable upon exercise of
         outstanding warrants at a weighted average exercise price of $22.76,
         and (iii) 603,314 shares of Common Stock available for future grants
         under the Company's stock option plan. See "Management--Stock Option
         Plan," "Certain Transactions" and "Description of Capital Stock--
         Warrants."




                                      16
<PAGE>   18
                                    DILUTION

   
         At June 30, 1997, the net tangible book value of the Company was $14.6
million or $2.03 per share. Net tangible book value per share is equal to the
Company's total tangible assets less its total liabilities, divided by the
number of shares of Common Stock outstanding.  Net tangible book value dilution
per share represents the difference between the amount per share paid by the
purchasers of shares in the offering and the pro forma net tangible book value
per share of Common Stock immediately after completion of this offering.  After
giving effect to the sale by the Company of 1,400,000 shares of Common Stock
offered hereby (at an assumed offering price of $8.88 per share and after
deducting the estimated placement fee and offering expenses) the pro forma net
tangible book value of the Company at June 30, 1997 would have been
approximately $26.1 million, or $3.04 per share, representing an immediate
increase in such pro forma net tangible book value of $1.01 per share to
existing stockholders and an immediate dilution in pro forma net tangible book
value of $5.84 per share to purchasers of Common Stock in this Offering.  The
following table illustrates this per share dilution:
    


   
<TABLE>
   <S>                                                          <C>     <C>
   Assumed price per share to public                                    $ 8.88
     Net tangible book value per share at June 30, 1997         $ 2.03  
     Increase per share attributable to new investors             1.01  
                                                                 -----  
   Pro forma net tangible book value per share after offering             3.04
                                                                        ------
   Dilution per share to new investors                                  $ 5.84
                                                                        ======
</TABLE>                                                                
    


         The foregoing computations assume no exercise of outstanding options
or warrants.  See Footnote (1) under "Capitalization."  To the extent that
outstanding options or warrants are exercised, there may be further dilution to
new investors.




                                      17
<PAGE>   19
                            SELECTED FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

         The following selected financial data for the years ended December 31,
1995  and 1996 are derived from the financial statements of the Company that
have been audited by Ernst & Young LLP, independent auditors, which are
included elsewhere in this Prospectus and are qualified by reference to such
financial statements and related notes thereto.  The statement of operations
data for the years ended December 31, 1993 and 1994 and the period from January
27, 1992 (inception) to December 31, 1992 and the balance sheet data at
December 31, 1992, 1993 and 1994 have been derived from audited financial
statements of the Company audited by Ernst & Young LLP that are not included or
incorporated by reference herein.  The statement of operations data for the six
months ended June 30, 1996 and 1997 and balance sheet data at June 30, 1997 are
derived from unaudited financial statements included elsewhere in this
Prospectus.  The unaudited financial statements include all adjustments,
consisting only of normal recurring adjustments, which the Company considers
necessary for a fair statement of the information set forth therein.  Operating
results for the six months ended June 30, 1997 are not necessarily indicative
of the results that may be expected for any future period.  The data set forth
below should be read in conjunction with "Management's Discussion and Analysis
of Financial Condition and Results of Operations" and the Financial Statements
and related Notes included herein.


   
<TABLE>
<CAPTION>
                                       PERIOD FROM  
                                       JANUARY 27,  
                                           1992                                                        SIX MONTHS ENDED 
                                      (INCEPTION) TO           YEAR ENDED DECEMBER 31,                     JUNE 30,     
 STATEMENT OF OPERATIONS DATA:         DECEMBER 31,    ----------------------------------------       -----------------
  Revenues                                 1992         1993       1994       1995        1996          1996       1997
                                           ----         ----       ----       ----        ----          ----       ----
 <S>                                     <C>           <C>       <C>       <C>         <C>            <C>        <C>
     Collaborative agreements.....       $    --       $   542   $ 1,145   $  1,178    $    759       $   759    $   894
     Grant and other income.......           190           198       172        102          14             4          3
     Interest income..............           168           451       270        395         936           348        382
                                         -------       -------   -------   --------    --------       -------    -------
        Total revenues............           358         1,191     1,587      1,675       1,709       $ 1,111    $ 1,279
  Costs and expenses:                                  
     Research and development.....         3,091         6,990     9,212     12,204      14,189         7,666      6,154
     General and administrative...           591         1,047     1,291      1,397       1,943         1,152        822
     Interest expense.............            28           187       334        554         845           449        437
                                         -------       -------   -------   --------    --------       -------    -------
          Total costs and                              
            expenses...............        3,710         8,224    10,837     14,155      16,977         9,267      7,413

 Net loss..........................      $(3,352)      $(7,033)  $(9,250)  $(12,480)   $(15,268)      $(8,156)   $(6,134)
                                         =======       =======   =======   ========    ========       =======    =======
 Net loss and pro forma net loss 
   per share(1)....................      $ (2.13)      $ (2.87)  $ (3.52)  $  (3.86)   $  (2.61)      $ (1.72)   $ (0.87)
                                         =======       =======   =======   ========    ========       =======    =======
 Shares used in computing net loss
   and pro forma net loss per                                                                                              
   share(1) .......................        1,574         2,453     2,627      3,230       5,845         4,731      7,038
</TABLE>
    



<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,                     AS OF JUNE
                                                ----------------------------------------------------          30,
    BALANCE SHEET DATA:                           1992       1993      1994        1995       1996           1997
                                                  ----       ----      ----        ----       ----           ----
    <S>                                        <C>        <C>        <C>        <C>         <C>            <C>
      Cash, cash equivalents and
       securities available-for-sale......      $ 13,364  $  9,426   $  7,734    $ 6,420     $17,594       $ 13,269
      Working capital.....................        13,245     8,332      5,640      4,648      15,788         11,678
      Total assets........................        15,872    13,399     12,392     14,223      25,292         21,165
      Capital lease obligations and long-
       term debt net of current portion...           821     1,611      1,853      3,179       2,430          2,151
      Accumulated deficit.................        (3,352)  (10,385)   (19,635)   (32,115)    (47,383)       (53,518)
      Total stockholders' equity..........        14,601    10,536      8,247      8,478      20,362         16,948
</TABLE>

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

   
(1)      See Note 1 of Notes to Financial Statements for information concerning
         the computation of net loss and pro forma net loss per share.
    



                                      18
<PAGE>   20
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

         RPI was founded to capitalize on the broad potential of ribozymes for
use in the development of human therapeutics and therapeutic target validation
services.  The Company's technology is based on Professor Thomas R.  Cech's
discovery of "ribozymes," for which he shared a Nobel Prize in 1989.  Ribozymes
are a form of ribonucleic acid that have the ability to selectively inhibit
protein production.  Because many disease states are the result of abnormal
protein production, ribozymes are potentially applicable to a wide range of
human diseases.  RPI believes that its ribozyme technology may provide a new
paradigm for drug design and disease treatment and may be a significant tool
for the identification of gene function and target validation.  The Company has
entered into a collaboration with Chiron to develop ribozyme products for
specific therapeutic targets in human health, a second collaboration with
Chiron in the target validation area, and a collaboration with Schering to
validate new therapeutic targets from gene sequence data using the Company's
functional genomics technology. The Company has also licensed its technology to
DowElanco for certain agricultural applications and IntelliGene for certain
diagnostic applications.


         The Company completed its initial public offering in April 1996
resulting in net proceeds of approximately $20.6 million.  Concurrent with the
closing of the offering, Chiron purchased common stock at an aggregate purchase
price of $3.6 million and paid the Company an additional $1.8 million to
complete the purchase of a warrant issued to Chiron upon the closing.

         The Company does not anticipate revenues from product sales in the
foreseeable future. The Company has incurred losses since inception and, as of
June 30, 1997, had an accumulated deficit of $53.5 million.  The Company
anticipates incurring additional losses over at least the next several years as
it expands its research and development programs, including pre-clinical
studies and clinical trials.  Such expansion will result in increases in both
research and development and general and administrative expenses. The Company's
sources of funds for the next several years will be payments from strategic
collaborations and licensing arrangements, if any, sale of equity and interest
income.  Certain payments under strategic collaborations are contingent upon
the Company meeting certain milestones.  Payments under strategic
collaborations and licensing arrangements will be subject to significant
fluctuation in both timing and amount and therefore the Company's results of
operations for any period may not be comparable to the results of operations
for any other period.


RESULTS OF OPERATIONS

   
Six Months Ended June 30, 1997 and 1996
    

         Collaborative revenues increased 18% to $894,000 for the six months
ended June 30, 1997, from $759,000 for the corresponding period in 1996.  The
increase is primarily due to a $500,000 quarterly research payment made by
Schering in April 1997.  The April payment was the first in the Schering
collaboration which includes $2.0 million in annual research funding over the
five year term of the collaboration. Generally, collaborative agreement and
contract revenue fluctuations are the result of changes in the number of funded
research projects as well as the timing and completion of contract milestones.

         Interest income increased to $382,000 for the six month period ended
June 30, 1997 compared to $348,000 for the corresponding period in 1996. The
increase is due to the receipt of  net proceeds from the Company's public
offering in April 1996 resulting in higher average invested cash balances for
the first six months in 1997 compared to the same period in 1996.  Interest
income generally fluctuates as a result of the average amount of cash available
for investment and prevailing interest rates.

         Research and development expenses decreased 25% to $6.2 million for
the six months ended June 30, 1997, compared to $7.7 million for the
corresponding period in 1996.  The decrease is due to a one-time $1.8 million
research funding expense relating to a collaboration agreement with Chiron
regarding gene function




                                     19
<PAGE>   21
determination, which was recorded in May 1996.  The Company expects research
and development expenses to increase as it expands its research and development
programs, including pre-clinical studies and clinical trials.

         General and administrative expenses decreased 40% to $822,000 for the
six months ended June 30, 1997, compared to $1.2 million for the corresponding
period in 1996.  The decrease in general and administrative expense is
primarily due to one-time cash and stock bonus payments made to the Company's
executive officers in connection with the initial public offering in April
1996. The Company expects general and administrative expenses to increase as a
result of hiring additional management and administrative personnel and the
incurring of legal and other professional fees in connection with the overall
scale-up of the Company's operations and business development efforts.

         Interest expense decreased to $437,000 for the six months ended June
30, 1997, compared to $449,000 for the corresponding period in 1996.  The
decrease is attributable to the buy out of capital leases that terminated in
the last half of 1996 and during the first six months of 1997.


   
Years Ended December 31, 1996 and December 31, 1995
    

         Revenues from collaborative agreements and grants decreased $527,000
to $773,000 for the year ended December 31, 1996, compared to $1.3 million for
the year ended December 31, 1995. Collaborative revenues for 1996 include a
one-time payment in the first quarter from Pharmacia Biotech AB ("Pharmacia
Biotech") under an agreement related to the development of improved synthesis
and purification methods for the preparation of modified amidites and chimeric
oligonucleotides.  Collaborative agreements and contract revenue fluctuations
are generally the result of changes in the number of funded research projects
as well as the timing and completion of contract milestones.

         Interest income for the year ended December 31, 1996 increased
$541,000 to $936,000 from $395,000 for the year ended December 31, 1995, due to
increased average invested cash balances resulting from the investment of the
proceeds from the Company's initial public offering completed in April 1996.
Interest income generally fluctuates as a result of cash available for
investment and prevailing interest rates.

         Research and development expenses for the year ended December 31, 1996
increased $2.0 million to $14.2 million from $12.2 million for the year ended
December 31, 1995.  The increase was primarily due to a one-time $1.8 million
payment to Chiron pursuant to a collaborative agreement. In addition, a
$540,000 charge was recognized in 1996 for the issuance of 45,000 shares of
Common Stock in exchange for the elimination of future commercial product
royalty payments.  Research and development expenses consist primarily of
salaries and benefits for scientific, regulatory, quality control and pilot
manufacturing personnel, consultants, supplies, occupancy costs and
depreciation for laboratory equipment and facilities.

         General and administrative expenses increased $500,000 to $1.9 million
for the year ended December 31, 1996 compared to $1.4 million for the year
ended December 31, 1995. The increase in general and administrative expenses is
primarily due to one time cash and stock bonus payments made to the Company's
executive officers in connection with the public offering, as well as the
hiring of additional management and administrative personnel and the increased
legal and other professional fees in connection with the overall scale-up of
the Company's operations and business development efforts following the initial
public offering.

         Interest expense increased $291,000 to $845,000 for the year ended
December 31, 1996 compared to $554,000 for the year ended December 31, 1995.
The increase is primarily attributable to increased borrowings on long-term
debt during late 1995 which were used to fund the Company's expansion of its
laboratory and office space.


LIQUIDITY AND CAPITAL RESOURCES

         The Company has financed it operations since inception through a
public offering in April 1996, private placements of preferred stock, and funds
received under the Company's collaborative agreements with Schering,




                                     20
<PAGE>   22
Chiron, the Parke-Davis Division of Warner-Lambert Company ("Parke-Davis") and
DowElanco. As of June 30, 1997 the collaborations with Parke-Davis and
DowElanco have been completed.   From inception through June 30, 1997, the
Company has received approximately $29.0 million in net proceeds from private
placements, $20.6 million in net proceeds from the initial public offering and
$22.3 million from its collaborations.

         The Company's cash, cash equivalents and securities available-for-sale
were $13.3 million at June 30, 1997, compared to $17.6 million on December 31,
1996.  The $4.3 million decrease in cash, cash equivalents and securities
available-for-sale is primarily the result of cash used for research and
development, investment in equipment, payments under loan facilities and for
general corporate purposes, offset by net proceeds from the sale of Common
Stock.

         The Company invests its cash, cash equivalents and securities
available-for-sale in interest-bearing investment grade securities.

         Total additions for property, plant and equipment for the six months
ended June 30, 1997, were $880,000, including $254,000 of additions financed
through the Company's existing equipment loan facilities.

         As of June 30, 1997, up to $2.0 million in loans are available to the
Company in each calendar year through the year 2001, from Schering.  The loans
are related to the Schering research collaboration entered into in April 1997.
Amounts not used in any calendar year may be carried forward to future years.
According to the terms of the Company's agreement with Schering, 50% of any
borrowings on the line of credit must be collateralized by equipment purchases.
In addition to the line of credit, Schering has agreed to provide $2.0 million
in annual research funding for each year through April 2001 and will make an
additional equity investment of $2.5 million in May 1998.  All such payments
are subject to certain restrictions, including receipt of certain third party
consents, and are subject to the termination of the research collaboration at
Schering's option at any time after April 9, 1998.  See
"Business--Collaborative Relationships and License Agreements" and Note 7 of
Notes to Financial Statements.

         The Company estimates that its existing capital resources, together
with facility and equipment financing and expected revenues from its
collaborative agreements, will be sufficient to fund its current and planned
operations at least until late 1998.  There can be no assurance, however, that
changes in the Company's  research and development plans, funding of technology
development, or other changes affecting the Company's operating expenses will
not result in the expenditure of such resources before such time and, in any
event, the Company will need to raise substantial additional capital to fund
its operations in future periods.  Such additional capital may be raised
through public or private financing, as well as collaborative relationships,
borrowing and other available sources.  See "Risk Factors--Future Capital
Needs; Uncertainty of Additional Funding."

         At December 31, 1996, the Company had available net operating loss
carryforwards, research and development credit carryforwards and state
investment credit carryforwards of $47 million, $922,000 and $31,000,
respectively, for income tax purposes.  The Company's ability to utilize its
net operating loss carryforwards is subject to an annual limitation in future
periods pursuant to the "change in ownership" rules under Section 382 of the
Internal Revenue Code of 1986 .  See Note 10 of Notes to Financial Statements.




                                     21
<PAGE>   23
                                    BUSINESS


OVERVIEW

         RPI was founded to capitalize on the broad potential of ribozymes for
use in the development of human therapeutics and therapeutic target validation
services.  The Company's technology is based on Professor Thomas R.  Cech's
discovery of "ribozymes," for which he shared a Nobel Prize in 1989.  Ribozymes
are a form of ribonucleic acid that have the ability to selectively inhibit
protein production.  Because many disease states are the result of abnormal
protein production, ribozymes are potentially applicable to a wide range of
human diseases.  RPI believes that its ribozyme technology may provide a new
paradigm for drug design and disease treatment and may be a significant tool for
the identification of gene function and target validation.  The Company has
entered into a collaboration with Chiron to develop ribozyme products for
specific therapeutic targets in human health, a second collaboration with Chiron
in the target validation area, and a collaboration with Schering to validate new
therapeutic targets from gene sequence data using the Company's functional
genomics technology. The Company has also licensed its technology to DowElanco
for certain agricultural applications and IntelliGene for certain diagnostic
applications.

         The Company believes that its proprietary ribozyme technology platform
has the potential to address many of the issues associated with traditional
pharmaceuticals and drug discovery.  Ribozymes perform functions that are
different from those performed by ordinary RNA in that, after binding
selectively to their specific messenger RNA  target, ribozymes act
catalytically to cut, or cleave, the target mRNA molecule whereupon the mRNA is
destroyed.  Once the mRNA target is destroyed, the particular protein for which
the mRNA molecule carries information will not be produced, indicating that
ribozymes may be broadly applicable in the control of protein production or
gene expression. In general, the vast majority of diseases involve either
inappropriate expression of proteins or RNA viruses.  In addition, ribozymes
can be designed to select for a single specific target genetic sequence.  The
Company believes this highly selective mechanism of action has the potential to
minimize the side effects of its therapeutic products.  Also, because ribozymes
are not consumed in the act of cleaving the target mRNA, a single ribozyme may
cleave multiple targets, thus potentially leading to lower ribozyme dosing
requirements.

         RPI's business strategy is to utilize its ribozyme technology to
develop a new and novel class of human therapeutic products and a service
business for therapeutic target validation.  Additionally, RPI will continue to
seek partners to license the technology in areas such as agriculture, animal
health and diagnostics. The Company plans to develop therapeutic products
through both internal programs and collaborations. In addition to using
ribozymes to develop therapeutic products, RPI believes that its ribozyme
technology may be used as a drug discovery technology to characterize the
function of potential target genes.  Since ribozymes can be designed to select
for a single target genetic sequence, ribozymes may be used to identify the
function of that sequence.  As a result, links between gene dysfunction and
disease can be validated.  The Company has entered into collaborations with
Chiron and Schering to use the Company's ribozyme technology to determine the
function of selected genes and gene sequences, and plans to enter into
additional partnerships in this area in the future.




                                     22
<PAGE>   24
   
         The Company is working with Chiron on the development of a number of
products targeted at viral diseases, cancer, restenosis and ocular diseases. In
April 1996, RPI was granted NIH Recombinant DNA Advisory Committee exemption for
its proposed clinical trial of a retroviral vector containing two ribozymes to
treat blood progenitor cells from HIV-infected individuals. In January 1997, RPI
and collaborators received approval of their Investigational New Drug
Application with the U.S. Food and Drug Administration, and a Phase I/IIa
clinical trial was initiated in March 1997.  The physician-sponsored study seeks
first to demonstrate the safety of reinfusion of the ribozyme containing cells
and second to measure the ability of ribozyme-expressing cells to engraft and
survive after reinfusion into HIV-infected patients. This study is part of a
collaboration between RPI, Chiron, the City of Hope, and Childrens Hospital in
Los Angeles.  See "Business--Product Development Programs" and "--Collaborative
Relationships and License Agreements."
    

         RPI believes that its patents and proprietary technology provide a
significant competitive advantage in the field of ribozymes.  At the core of
RPI's technology are inventions and patents of Dr. Cech and various of his
associates.  RPI believes that licenses to these patents and those filed by RPI
grant the Company the exclusive right to control the manufacture, use and sale
of ribozymes and any products that incorporate ribozymes.


BACKGROUND

         Many disease states are characterized by abnormal production of gene
products such as proteins.  The abnormality may be due to a defective gene or
to over-production of a protein by a "normal" gene.  Such abnormal or excessive
production of protein may have direct effects on cells within the body or may
initiate a cascade of events involving other proteins within the body, thereby
producing disease.

         Production of proteins from genes, called protein "expression,"
involves two steps.  First, the information from the DNA of the gene is
"transcribed" to mRNA.  The second step involves "translation" of the mRNA and
its information into a protein.  This process by which genetic information is
"expressed" in the form of a protein is highly selective; production of a
particular protein requires its own specific DNA which leads to a specific mRNA
molecule.


DRUG DISCOVERY

         Traditional drug discovery and development is difficult, time
consuming and extremely costly.  Historically, diseases have been treated using
therapeutic agents, or drugs, based on clinical observation of symptoms which
were correlated with abnormal physiological processes and, where possible,
biochemical changes.  Most drugs are chemicals designed to inhibit or induce
the function of the target molecule with as few unwanted side effects as
possible.  These drugs generally have been discovered through a complex,
lengthy and expensive process of elimination.  The process begins by selecting
a possible target (usually a protein), developing a screening assay, chemically
synthesizing large numbers of different molecules which are tested in cell
cultures and in animal models for their effect on the target, using those
results to narrow the number of molecules down to a few possible lead
molecules, and then refining the lead molecules through additional chemical
synthesis and testing, including testing in humans.  Unfortunately, drugs
produced from this process are typically molecules whose desired effect on the
target is accompanied by undesirable side effects on non-targeted molecules,
also referred to as a "toxicity" or "lack of selectivity," which can limit
effective use of the drug.

         Pharmaceutical companies are under intense pressure to find
alternatives to traditional drug discovery and development in an effort to
identify and commercialize novel drugs more quickly and cost effectively and
with fewer side effects.  The Company also believes that pricing pressures from
managed care organizations, governmental agencies and third party payers,
coupled with the proliferation of technologies that offer revolutionary
approaches to drug design and development, are causing major shifts in the
paradigms of drug discovery and development.




                                     23
<PAGE>   25
ADVANTAGES OF RIBOZYMES

         The Company believes that ribozymes may offer certain advantages over
other therapeutic approaches for the treatment of diseases.

         Potential Broad Applicability.  Some genes and their corresponding RNA
or proteins have already been identified as having causative roles in human
disease pathology, animal health, and agriculture.  In addition, identification
of new genes is rapidly increasing in both the public and private sector, and
it is expected that all of the genes which comprise the human genome will be
identified within the current decade.  Once a gene has been sequenced,
ribozymes can be designed to inhibit the production of a protein from the
associated mRNA.  Therefore, all diseases for which a causative protein or gene
target can be identified present a potential application for the Company's
ribozyme technology.  The Company believes that its ribozyme technology is an
important bridge between the growing body of knowledge of the human genome and
the development of human therapeutics.

         High Selectivity.  The mechanism by which traditional drugs act on a
target gene or protein often is not well understood.  Consequently, side effect
profiles of such drugs are difficult to predict and characterize.  Other
therapeutic approaches may result in interactions with non-targeted molecules
that cause unintended side effects.  The Company believes these side effects
may be reduced or avoided with ribozymes because of their selectivity in
binding and cleaving the target mRNA.  The Company believes that ribozymes may
be constructed with a nucleotide binding sequence that will match only one
corresponding target mRNA, and the target mRNA sequence is expected to appear,
on a statistical basis, only once in the entire human genome.

         Catalytic Action.  Since ribozymes act catalytically, they are not
consumed in the act of cleaving the target mRNA.  Therefore, a single ribozyme
may cleave multiple target mRNA molecules.  The Company believes that dosage
requirements for ribozymes may be lower than traditional pharmaceuticals due to
their catalytic activity.

         Target is Destroyed.  Instead of temporarily preventing expression of
a target gene, ribozymes cut the target mRNA into fragments, which are
subsequently degraded by cellular nucleases.  Since the target mRNA is
destroyed in the process, expression of the disease-causing protein can be
controlled.  By contrast, most other therapeutics do not destroy their target
molecule.


RPI'S BUSINESS STRATEGY

         RPI's objectives are to develop human therapeutics, to exploit its
ribozyme technology platform as a functional genomic tool for target validation
and gene function identification and to license animal health products and
agricultural products.  The Company's strategy for achieving these objectives
includes the following elements:

         Develop Human Therapeutic Products.  RPI plans to exploit its ribozyme
technology to develop a broad range of human therapeutic products through
alliances with collaborators and licensees directed at target-specific products
and internal product development programs.  The Company has established a
collaboration with Chiron to pursue the development of ribozyme based products
which are targeted at specific mRNA molecules, and is also conducting an
internal drug development program.

         Pursue Additional Collaborations in Therapeutic Target Validation. The
Company believes that application of its ribozyme technology can accelerate
identification of gene function and validate gene "targets" leading to highly
selective therapeutic compounds.  The Company has entered into collaborative
agreements with Chiron and Schering to determine the validity of selected genes
and gene sequences as therapeutic targets.  The Company will continue to pursue
additional partners in the pharmaceutical and biotechnology industries for the
purpose of further exploiting this commercial opportunity with its ribozyme
technology.

         License Non-Human Health Applications.  RPI plans to exploit
additional opportunities in diagnostics, agriculture and animal health  by
licensing the ribozyme technology to partners.  The Company has completed a
feasibility study for certain agricultural applications with DowElanco and has
licensed its technology to DowElanco for certain agricultural applications.
Additionally, the Company has licensed its technology to IntelliGene for
certain diagnostic applications.




                                     24
<PAGE>   26
         Maintain and Expand Patent Portfolio and Proprietary Technology.  RPI
has sought and will continue to seek to strengthen its proprietary position for
its ribozyme technology by aggressively pursuing patent protection and
defending its patents and proprietary technology.


RPI'S RIBOZYME TECHNOLOGY

         The RPI approach to drug discovery and development begins by
identifying a target gene.  Ribozymes are designed by analyzing the nucleotide
sequences of the target gene and creating complementary ribozyme nucleotide
sequences.  The next step is to synthesize ribozymes that are targeted
specifically to sites in the target gene.  Next, the ribozymes are delivered to
the target cell either as a synthesized chemical or by encoding the ribozymes
into a DNA sequence for delivery by a "vector."

         Upon delivery, the cell or animal is analyzed to determine whether
ribozyme inhibition of the potential target gene has affected the progression
of the disease (i.e., expression of the disease-causing gene or protein has
been inhibited).  If the action of the ribozyme stops progression of the
disease, then not only has the causative role of the gene been validated, but a
drug candidate has also been identified.  If not, the potential target gene may
be eliminated as a target for therapeutic intervention.

         Once a target gene and ribozyme lead are identified, the delivery
method and the delivery vehicle are chosen.  In addition, the ribozyme is
optimized by techniques such as variation of binding arm length and additional
serum stabilization.  The Company believes that these techniques can be used to
accelerate the drug discovery process. The Company's successful
commercialization of ribozyme technology for therapeutic applications will
require that a number of technical issues be satisfactorily addressed,
including ribozyme design, stability, selectivity, synthesis and scale-up, drug
delivery and cell uptake, safety and efficacy.  To date, RPI has achieved a
number of significant milestones related to the development of ribozymes,
including the following:

         Stability. In order to be useful as a therapeutic, a ribozyme must
remain stable in human serum long enough to have the desired effect.  While
unmodified RNA is stable in human serum for only a few seconds, the Company has
successfully produced chemically-modified ribozymes that are stable in human
serum for more than 10 days and fully active in vitro.  The Company believes
that this level of stability may be sufficient to achieve therapeutic effects.

         Design. The Company has developed a proprietary computer program that
can design ribozymes against sites in a target mRNA sequence.  This gives the
Company the ability to accelerate the identification of both lead ribozymes and
multiple back-ups.

         Selectivity. Based on third party studies and internal work performed
by RPI, the Company believes that a ribozyme with a binding region of
approximately 15 nucleotides will be optimal.  A binding region of this length
is expected to match, on a statistical basis, only one corresponding target
mRNA nucleotide sequence in the entire human genome.  Since the ribozyme should
only interact with the target mRNA, it should not impact non-targeted
molecules.  The high degree of selectivity of ribozymes has been demonstrated
through the use of inactive ribozyme controls in both cell culture and animal
studies.

         Synthesis and Scale-Up. To meet the Company's needs for pre-clinical
and clinical trials and the eventual commercialization of ribozymes, the
Company needs large scale ribozyme synthesis capabilities.  The Company has
developed proprietary technology that allows it to routinely synthesize several
hundred stabilized ribozymes on a monthly basis in milligram quantities,
permitting RPI to perform direct cell-based screening of multiple potential
target sites in several weeks.  The Company also has the capability of
synthesizing gram quantities of ribozymes, as it has done for in vivo studies.
In that regard, RPI has designed and constructed its facilities to meet cGMP
standards.  RPI has implemented quality assurance and quality control
procedures that are used for large scale synthesis.  RPI synthesizes ribozymes
using commercially available synthesizers.  In addition, the Company has
established a collaboration with Pharmacia Biotech to develop technology for
reducing the cost of synthesizing the modified amidites that are used to
manufacture chemically synthesized ribozymes, and with Protogene Laboratories,
Inc. ("Protogene") for parallel, automated synthesis of large numbers of
different ribozymes.  See "Business--Collaborative Relationships and License
Agreements."




                                     25
<PAGE>   27
         Drug Delivery and Cellular Uptake. Successful development of any
therapeutic requires that it be delivered to the desired site in the body and
remain active long enough to have a therapeutic effect.  The Company is
exploring local and systemic delivery of chemically synthesized ribozymes as
well as vector delivery.  For example, the Company has shown that local
delivery of a chemically stabilized ribozyme to a rat cornea can significantly
inhibit angiogenesis.  In addition, the Company is exploring the use of lipids
and other carriers to enhance cellular uptake and for systemic delivery.  The
Company has identified several different formulations of carriers which, when
complexed to chemically synthesized ribozymes, have shown significant increases
in the delivery of ribozymes (relative to ribozymes without a carrier) to a
variety of different cell types.  The Company also is working on chemically
modifying ribozymes to be preferentially taken up by certain tissues and/or by
specific intracellular compartments.

         The Company has demonstrated that the formulation of ribozymes with
various lipid based carriers increases the in vivo circulation time of the
formulated ribozyme in plasma to days.  The Company has demonstrated similar
formulations of ribozymes also result in significantly longer tissue exposure
when administered locally. The Company believes that the use of such
technologies will allow for a significant dose reduction of ribozymes that have
currently shown efficacy when unformulated.

         The Company has also developed proprietary retroviral vector
constructs containing ribozymes that produce high ribozyme accumulation in
cells compared to standard vector constructs.  The expression of fully-active
ribozymes utilizing these constructs has been demonstrated in vitro for periods
greater than 90 days.  The Company has also demonstrated transduction of
multiple cell types (e.g., T-cells, CD34+ cells and others).  RPI is pursuing
ribozyme vector development internally and manufacturing through its
collaboration with Chiron. The Company believes that vector delivery of
ribozymes may have several potential therapeutic advantages, including high
target specificity, lack of activity against other genes, long term, high
expression levels of ribozymes and infrequent dosing.  Vector delivery of
ribozymes may be particularly useful for the chronic treatment of diseases,
where the therapy is needed over long periods of time and frequent dosing is
not desirable or feasible.

         Efficacy and Ribozyme Mechanism. In collaboration with its strategic
partners, the Company has demonstrated that its ribozymes can inhibit gene
expression and affect cellular function in vitro and in vivo.  Ribozymes
targeting several specific mRNAs have demonstrated specific reduction of the
levels of their corresponding mRNAs.  This inhibition of gene expression
requires target binding and ribozyme catalysis: inactive and irrelevant
ribozyme controls have no specific effect.  Ribozyme-mediated reductions in
mRNA correlate with reductions in protein expression and changes in cellular
function.  In addition, the Company has shown efficacy of a ribozyme in an
animal model of angiogenesis, while inactive ribozymes showed essentially no
effect.  Similar studies have been performed by the Company and others that
have demonstrated inhibition of gene expression in vitro and in vivo by
ribozymes expressed from vectors.

         Safety. The Company has completed an initial animal safety study to
test the toxicity of chemically stabilized ribozymes.  This study was a
five-day, intravenous single dose, acute toxicology study in rats and monkeys.
The Company's study included extensive follow up procedures, including body
weight, ECG/BP, haemolysis, complement activation, clinical chemistry and
urinalysis.  In the study, while there was significant systemic exposure of
serum and tissues to the ribozyme, no drug-related toxicities were found at any
dose.  In particular, there were no deaths, no blood clotting abnormalities, no
activation of complement and no evidence of hypotension.

         Continuing Technology Development. The Company is continuing to
improve its ribozyme technology for its potential products, including increased
stability and catalytic activity, synthesis and scale-up, drug delivery and
cellular uptake.  For systemic applications, the Company may need to refine the
ribozyme technology to improve the delivery of ribozymes to specific tissues
and improve cellular uptake.  See "Risk Factors--Technological Uncertainty."


PRODUCT DEVELOPMENT PROGRAMS

         The Company is developing products through a combination of
collaborative research and development relationships.  The current product
development programs for human therapeutic applications apply chemically




                                     26
<PAGE>   28
synthesized and vector delivered ribozymes to both acute and chronic diseases
in areas of significant medical need and market opportunity.  The following
table summarizes the current status of the Company's human therapeutic and
agricultural product development programs.

                          PRODUCTS UNDER DEVELOPMENT
                                                  
<TABLE>
<CAPTION>

RPI-PARTNER          PRODUCT AREA                    DEVELOPMENT STATUS(1)
- -----------          ------------                    ---------------------
<S>                  <C>                             <C>
Chiron               HIV                             Phase I/IIa clinical trials
                     Retinopathy                     Pre-clinical development
                     Macular degeneration            Pre-clinical development
                     Tumor angiogenesis              Pre-clinical development
                     Oncogenes                       Research
</TABLE>

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

   (1)   "Pre-clinical development" includes pharmacology and toxicology 
         testing in animal and in vitro models, product formulation, dosage
         studies and manufacturing scale-up for submission of the necessary
         data to comply with applicable regulations prior to commencement of
         human testing.  "Research" includes the identification of target
         proteins, synthesis of an appropriate ribozyme to block expression of
         such protein, and testing the activity of such ribozyme in a
         specific cell population.


  CHIRON

         The Company is working with Chiron on the development of a number of
products targeted at viral diseases, cancer, restenosis and ocular diseases.
Chiron is a public biotechnology company located in Emeryville, California,
that develops and commercializes products for human diagnostic, prophylactic
and therapeutic use.  Under their collaboration, the Company and Chiron are
pursuing research and development of drugs for the following indications:

         Human Immunodeficiency Virus (HIV). The Company believes that
ribozymes may provide a new approach to the treatment and prevention of HIV
infection and replication.  The Company has sought to identify target sites
that are present throughout the replication life cycle of HIV and are conserved
in known clinical strains of HIV.  The Company is directing ribozymes at
several sites in HIV that are being incorporated into a single vector, so that
the ribozyme therapy may avoid emergence of resistance due to viral mutations.

         In collaboration with Chiron, the City of Hope and Children's Hospital
(Los Angeles), the Company initiated a physician-sponsored Phase I/IIa clinical
trial for HIV in March 1997.  This study uses a retroviral vector containing
two ribozymes, one against a site in the tat region and the other against a
site in the tat/rev region of the HIV virus.  This construct has demonstrated
protection against HIV challenge in monocyte cells derived from "stem cells"
(CD34+ cells) transduced with the retroviral construct.  This demonstrates a
number of important results, including successful retroviral transduction of
CD34+ cells, transmission of the ribozyme into cell progeny derived from CD34+
cells (i.e., monocytes), and protection of the monocytes against HIV challenge.
An IND with the FDA was filed in December 1996 and approved in January 1997
for a physician-sponsored clinical trial including five HIV-infected subjects.
Chiron Technologies Center for Gene Therapy was responsible for master cell
bank development and production of the ribozyme construct.  The primary
clinical endpoint for this study is general safety and tolerance, although
re-engraftment efficiency and selected survival data of ribozyme expressing
cells may be obtained.  Enrollment for this trial is complete and to date four
patients have been treated.

         Tumor Angiogenesis and Oncogenes. Angiogenesis and the abnormal
production of oncogenes have been linked to the formation, growth and
maintenance of cancerous tumors.  The Company has initiated several research
programs in collaboration with Chiron in both oncogene and angiogenesis
inhibition.  In studies performed in collaboration with Chiron, lead ribozymes
targeting VEGF receptors have demonstrated dose dependent cell culture efficacy
in the inhibition in human endothelial cell proliferation.  In a mouse model
using Lewis Lung Carcinoma implants in vivo efficacy has been shown in a dose
dependent manner using continuous intravenous administration of a ribozyme.
Further animal studies are currently under way to test the effectiveness of
these anti-VEGF




                                     27
<PAGE>   29
ribozymes in other cancer models and using formulated ribozymes in various
cancer models. Additional animal studies are being carried out to test the
efficacy of ribozymes for the treatment of restenosis.

         In studies performed in collaboration with Chiron, lead ribozymes
demonstrated dose-dependent cell culture efficacy in the inhibition of human
endothelial cell proliferation, while inactive and irrelevant ribozyme controls
showed essentially no effect.  In addition, the Company's animal efficacy
studies in a rat corneal model of angiogenesis demonstrated significant
inhibition of Vascular Endothelial Growth Factor (VEGF)-induced angiogenesis
when free ribozymes were delivered, while inactive ribozyme controls showed
essentially no effect.  The Company is conducting pre-clinical studies in
collaboration with Chiron and believes its VEGF ribozymes may be applicable in
several ocular indications such as retinopathy and age-related macular
degeneration.

         Retinopathy. Diabetic retinopathy is a degenerative ocular disease
resulting in blindness and, according to The New England Journal of Medicine,
is the most common cause of blindness in adults aged 25 to 74 in the United
States.  Proliferative diabetic retinopathy is characterized by the
proliferation of blood vessels, known as angiogenesis, in the retina resulting
in blindness.  According to the Incidence and Prevalence Database (the "IPD"),
as of 1994, this disorder affected approximately one million people in the
United States.  According to The American Academy of Ophthalmology, there are
65,000 new cases of proliferative diabetic retinopathy every year in the United
States.  Current proliferative diabetic retinopathy treatments, including
surgery and laser photocoagulation, are not believed to be optimum long-term
solutions.


         Age-Related Macular Degeneration. Age-related macular degeneration
(ARMD) is the leading cause of blindness in people over 60 years of age.  It is
caused when the choroid vessels invade the macula through disruptions in
Bruch's membrane.  This is referred to as choroidal neovascularization and
accounts for the vast majority of legal blindness, according to the Survey of
Ophthalmology journal.  Thirteen million persons over the age of 40 are
afflicted with ARMD, and 1.2 million are in the later, vision-threatening stage
of the disease.  The British Journal of Ophthalmology reported that ARMD is the
most common cause of blindness in most Western communities.  Despite some
efficacy of laser photocoagulation in the treatment of ARMD, only a small
percentage of all patients with the disease are eligible for laser treatment.



         There can be no assurance that the Company will be permitted to
undertake additional human clinical testing of the Company's potential products
or, if permitted, that such products will be demonstrated to be safe and
efficacious or will be determined to be marketable.  See "Risk
Factors--Uncertainty of Product Development."


COLLABORATIVE RELATIONSHIPS AND LICENSE AGREEMENTS

         An element of the Company's strategy is to enter into collaborative
research and development agreements, joint ventures, licensing agreements or
other arrangements to exploit its technology as broadly as possible.  The
Company seeks partners whose interests, development and marketing capabilities
are complementary to those of the Company or partners who wish to pursue areas
which otherwise would not be developed by the Company.  See "Risk
Factors--Dependence on Collaborative Relationships."


         The Company's current collaborations are described below.


  SCHERING

         In April 1997 the Company entered into a research collaboration with
Schering focusing on the use of ribozymes for therapeutic target validation, as
well as the development of ribozymes as therapeutic agents.

         The collaboration will utilize the special selectivity of ribozymes to
validate new molecular therapeutic targets, and to discover new therapeutic
agents based on those targets.  RPI will provide its expertise in ribozyme




                                     28
<PAGE>   30
design, synthesis and delivery, and Berlex Laboratories, Inc., a U.S.
subsidiary of Schering ("Berlex"), will provide candidate targets, cell culture
screens, animal models and development and commercialization expertise to the
collaboration.  The Company anticipates that hundreds of potential targets may
be examined over a five year period, and Berlex will have options to
commercialize products from any validated targets.

   
         Schering will make an equity investment of up to $5 million over the
next year and will separately provide loans of up to $2 million annually for
each of the next five years.  The first equity investment was completed in May
1997, resulting in proceeds of $2.5 million to the Company in exchange for
212,766 shares of Common Stock.  The loans, which are to carry an interest rate
of 8% per annum, are convertible into equity at the option of Schering under
certain circumstances.  Principal and interest payments on the loans are
deferred until maturity of the loans which is in April 2004.  In addition,
Schering will make research payments of $2 million a year for the next five
years and RPI may earn success fees upon product development milestones, and
will manufacture synthetic ribozyme products and receive royalties on sales of
both ribozyme and non-ribozyme products resulting from the collaboration.  All
such payments are subject to certain restrictions, including receipt of certain
third party consents and the termination of the research collaboration at
Schering's option at any time after April 9, 1998.
    


  CHIRON

         In July 1994, RPI entered into a collaborative agreement with Chiron
under which RPI and Chiron have agreed to collaborate in the research,
development and marketing of ribozyme products directed toward certain genetic
targets. In connection with the collaboration, the Company and Chiron will each
contribute intellectual property and other resources to the development of the
targeted ribozyme products.  As of the date of this filing, the designated
genetic targets and their associated clinical indications are HIV, VEGF
receptors (retinopathy/corneal transplant rejection/cancer), ras and c-myb
(proliferative diseases) and another viral disease. The field of the agreement
includes diagnostic, prophylactic and therapeutic applications of ribozymes
directed toward these genetic targets.  The parties are concentrating their
initial collaborative research efforts on the VEGF receptor for diseases
associated with angiogenesis and HIV targets.  The term of the research program
is five years, renewable with the consent of both parties.  RPI and Chiron have
agreed to exclusively collaborate on up to five specific targets and to reserve
up to four other potential targets at any one time during the term of the
agreement.  Chiron may reject any new targets suggested by RPI; however, RPI
may reject new targets suggested by Chiron only in certain circumstances.

         The agreement provides that each party must pay its own pre-clinical
research costs.  The parties generally will share equally in the development
costs and net profits of any jointly developed products.  However, either RPI
or Chiron may elect not to participate in the clinical development of any
particular product.  If both parties elect not to continue development, then a
third party may be sought to develop the product under license to both parties.
In the event either RPI or Chiron elects to continue funding clinical
development alone, then the non-developing party would not share in the profits
derived from the sale of that product but would receive a royalty based on net
sales.  However, the non-developing party may elect to retain its interest in
the profits of a particular product in which it has shared funding through
Phase I clinical trials, but has declined to fund Phase II or Phase III
clinical trials, at either the commencement of Phase III testing or the filing
of a New Drug Application ("NDA") or Product License Application ("PLA").  Upon
such an election, the non-developing party must pay its share of the
development costs to date, plus a predetermined risk premium.  Under certain
circumstances, RPI may pay up to 50% of such payment in shares of its Common
Stock.  See "Risk Factors--Future Capital Needs; Uncertainty of Additional
Funding."

         If either party declines to fund clinical development for a product
which subsequently fails to receive regulatory approval or is otherwise
abandoned, then the developing party may offset its development costs for one
such failed product with the profits otherwise allocable to the other party
from successful products.

         RPI retains the right to manufacture chemically synthesized ribozyme
products resulting from the collaboration, whether jointly developed, or
developed by Chiron or RPI individually.  Chiron and RPI will collaborate for
the manufacture of retroviral vector applications (gene therapy).

         Chiron holds exclusive marketing rights for all jointly developed
products, subject to a co-promotion agreement for sales in North America and
Europe.  In the Far East, Chiron has exclusive marketing rights with the right
to sublicense, although RPI retains the right to share in 50% of the profits.
The collaborative term for jointly




                                     29
<PAGE>   31
developed products is 30 years.  The license for solely developed products is
15 years after first commercial sale or the duration of patent protection,
whichever is longer.

         As part of the collaboration, Chiron made an equity investment of
$4.36 million in the Company.  In addition, Chiron purchased from the Company
377,202 shares of Common Stock with an aggregate purchase price of $3.64
million in 1996 at the time of the Company's initial public offering. Also at
the time of the Company's initial public offering, the Company issued Chiron a
warrant to purchase 444,444 shares of the Company's Common Stock which is
exercisable at a price of $22.50 per share, for an aggregate purchase price of
$4.50 per warrant share. In 1994, Chiron paid the Company $0.45 per warrant
share, or $200,000 and the balance of the warrant purchase price, $4.05 per
warrant share, or $1.8 million, was paid to the Company upon completion of its
initial public offering.

         In May 1996, the Company entered into a target validation
collaboration with Chiron for the use of ribozymes to characterize gene
function.  The collaboration gives Chiron the right to develop and
commercialize products that result from the collaboration, and would entitle
RPI to receive product development milestone payments and royalties on sales of
any such commercial products.  Chiron and RPI each pay a portion of the
research and development expenses of the collaboration and the Company agreed
to pay Chiron $1.8 million, which was paid in 1996, for research funding
related to the collaboration.


  DOWELANCO

         In September 1993, RPI entered into a two-year collaborative research
feasibility study with DowElanco.  The parties extended the study through April
1, 1996.  The goal of the feasibility study was to demonstrate the ability of
ribozymes to alter corn. Under the agreement, DowElanco provided support of
research for the feasibility study conducted at RPI. The feasibility study has
been completed, and in April 1997 the Company entered into a long term
commercialization agreement with DowElanco.  The agreement provides DowElanco
with a world-wide, non-exclusive license to commercialize oil, meal and starch
products in corn and several other crops.  RPI will receive royalties on
products sold.  The Company does not expect to receive royalties, if any, from
such license for a substantial period of time.




                                     30
<PAGE>   32
  INTELLIGENE

         In March 1997, the Company granted a worldwide exclusive license to
IntelliGene to develop and sell diagnostics for several target diseases using
ribozymes in amplified nucleic acid formats.  IntelliGene is a private,
venture-backed biotechnology company located primarily in Jerusalem, Israel
with an office in Sudbury, Massachusetts.  IntelliGene is developing diagnostic
products using  ribozymes created using a process called in vitro evolution.
The agreement provides for IntelliGene to develop diagnostic tests initially
against six infectious diseases in their laboratories in Jerusalem and
elsewhere, and to develop, make and sell diagnostic products based on these
tests, either alone or through sublicenses. RPI received a license fee and will
receive royalties on product sales as part of this agreement, and may assist in
the research and development efforts.


MANUFACTURING AND MARKETING STRATEGY

         In order to support its pre-clinical and clinical trial manufacturing
requirements, the Company has constructed manufacturing facilities that it
believes comply with applicable regulatory requirements and has established
operational Quality Assurance and Quality Control procedures.  The Company
believes that its existing facilities will be satisfactory for production of
ribozymes needed through Phase II clinical trials for the Company's current
product portfolio.

         The Company currently does not have the facilities or means to
manufacture on a commercial scale, market, distribute or sell any of its
potential products, including its drug development candidates.  RPI will need
to develop its own facilities or contract with third parties for the
manufacture of products for Phase III clinical trials and commercial quantities
for any products that it may develop for its own account or in connection with
collaborative arrangements in which it has retained manufacturing rights.

         The Company has expanded its quality control and quality assurance
program internally, including a set of standard operating procedures designed
to assure that the Company's products manufactured by or for it are conducted
in accordance with cGMP and other applicable domestic and foreign regulations.
See "Risk Factors--Uncertainty of Governmental Regulation" and "--Lack of
Manufacturing Experience; Reliance on Contract Manufacturers."

         The Company has entered into strategic partnerships with Chiron and
Schering that include the right for RPI to manufacture chemically synthesized
ribozyme products.

         The Company expects to market and sell certain of its products, if
successfully developed, directly and through co-promotion or other licensing
arrangements with third parties, including its collaborators and licensees.  In
certain markets, the Company may enter into distribution or partnership
agreements with pharmaceutical or biotechnology companies that have large,
established sales organizations.  See "Risk Factors--Lack of Sales and
Marketing Experience; Dependence on Third Parties."

         In connection with the establishment of its manufacturing
capabilities, the Company has entered into collaborations with Pharmacia
Biotech and Protogene.  In November 1995, the Company and Pharmacia Biotech
agreed to collaborate on the development of better synthesis and purification
methods for the preparation of modified amidites and chimeric oligonucleotides.
The goal of the collaboration is to reduce the cost of manufacturing ribozymes
and other oligonucleotide products that use amidites.  Pharmacia Biotech, which
is a subsidiary of  Pharmacia & Upjohn, Inc., has expertise in the manufacture
of oligonucleotide synthesis and purification instrumentation and software.
Under the terms of the collaboration, Pharmacia Biotech is providing RPI with
synthesis instrumentation and software, research funding and milestone
payments, a portion of which may be set-off against future royalties payable to
RPI.

         In December 1996, the Company entered into an agreement with
Protogene, a private biotechnology company, to develop an instrument which
allows high throughput synthesis of non-DNA oligonucleotides.  Under the terms
of the collaboration, RPI is supporting research and development, has made an
equity investment in Protogene and will have the option to buy the instrument.




                                     31
<PAGE>   33
COMPETITION

         RPI is engaged in the rapidly developing field of gene modulation.
Competition among entities attempting to develop gene modulation products for
the treatment of diseases is intense and is expected to increase.  The Company
faces specific competition from other companies engaged in the research,
development and commercialization of ribozyme-based technology as well as
competition from companies attempting other methods of gene expression control,
such as antisense and triplex.  In addition, the Company competes with large
pharmaceutical companies and established biotechnology firms, many of whom are
developing new products for the treatment of the same diseases targeted by the
Company.  In some cases, those companies have already commenced clinical trials
for their products.  Many of these companies have significantly greater
financial resources and expertise in research and development, manufacturing,
pre-clinical studies and clinical trials, obtaining regulatory approvals and
marketing than the Company.  The Company's collaborators and licensees may be
conducting research and development programs directed at the same diseases that
the Company is targeting.  In particular, the Company is aware that Chiron is
conducting product development programs that may be competitive with certain of
the RPI/Chiron collaborative programs.  Smaller companies may also prove to be
significant competitors, particularly through collaborative arrangements with
large pharmaceutical and biotechnology companies.  In addition, companies that
complete clinical trials, obtain required regulatory approvals and commence
commercial sales of their products before their competitors may achieve a
significant competitive advantage.  Academic institutions, governmental
agencies and other public and private research organizations also conduct
research, seek patent protection and establish collaborative arrangements for
products and clinical development and marketing.  These companies and
institutions compete with the Company in recruiting and retaining highly
qualified scientific and management personnel.  In addition to the above
factors, RPI faces competition based on product efficacy, safety, the timing
and scope of regulatory approvals, availability of supply, marketing and sales
capability, reimbursement coverage, price and patent position.  See "Risk
Factors--Dependence on Collaborative Relationships" and "--Intense Competition;
Rapid Technological Change."


PATENTS AND PROPRIETARY TECHNOLOGY

         RPI believes that patents and other proprietary rights are crucial to
the development of its business.  In addition to patents, the Company relies
upon trade secrets, know-how and continuing technological innovations in the
design, synthesis, and purification of ribozymes and in nucleic acid chemistry.
The Company also relies on licensing opportunities to develop and maintain its
competitive position.  It is the Company's policy to file patent applications
when appropriate to protect technology, inventions, and improvements that are
considered important in the development of its business.

         At the core of RPI's technology are inventions and patents of
University of Colorado ("CU")  Dr. Thomas R. Cech and various associates of
Dr. Cech.  Pursuant to the policies of CU, these inventions and the patents
issued thereon (the "Cech Technology") became the property of CU.  The Cech
Technology was assigned to CU's affiliate, University Research Corporation
("URC"), which in turn assigned the rights to license certain of the Cech
Technology to Competitive Technologies, Inc. ("CTI"), formerly known as
University Patents, Inc. United States Biochemical Corporation ("USB") licensed
the Cech Technology pursuant to two sublicenses.  One of these sublicenses was
for the Cech Technology held by CTI.  In November 1996 USB assigned to RPI its
rights under the sublicense from CTI and RPI entered into an amended and
restated license with CTI.  RPI also has obtained a license from URC and a
sublicense from USB for other Cech Technology held by URC.  The CTI license, 
URC license and USB sublicense together grant RPI the exclusive (except for
non-commercial academic research) worldwide right, among other things, to make,
use and sell RNA enzymes covered by licensed patents and products incorporating
them. The URC license and USB sublicense are fully paid.  The CTI license
provides for the payment of a royalty on sales of products incorporating RNA
enzymes, covered by licensed patents, and for certain minimum annual royalties. 
RPI may grant sublicenses to the licensed technology subject to the payment to
CTI of a share of royalty income from such sublicenses or a royalty on sales
from sublicensed products, methods or services, depending on the particular
licensed patents involved.  In addition, RPI must pay CTI a share of any option
fee, license fee, prepaid royalty or other "front-end" fee other than research
and development funding paid in connection with such sublicense.

         In September 1993, RPI was granted a right of first refusal to license
any new inventions, improvements and patents related to ribozyme technology
developed by Dr. Cech or others at CU, in exchange for certain




                                     32
<PAGE>   34
payments.  In order to maintain this right, RPI has agreed to fund research at
CU through an unrestricted grant of $750,000 payable in various installments
over a five year period commencing in September 1993.  As of December 31, 1996,
$375,000 of the unrestricted grant is still payable.  In addition, RPI has
agreed to pay CU a fee for each invention disclosure accepted by RPI under the
license.

         As part of the Company's overall intellectual property strategy, it
enters selectively into agreements with academic institutions either to license
pre-existing technology or to support the development of new technologies and
gain the commercial rights to such new technologies.  The Company has a number
of these agreements in place with institutions such as Duke University,
Garching Innovation GMBH, Georgetown University, Massachusetts Institute of
Technology, Stanford University, University of Florida, University of Toronto,
University of Vermont, and Yale University.

         In January 1996, the Company entered into a License Agreement with the
City of Hope for an HIV therapeutic based upon ribozyme technology.  Under the
agreement, the Company has the exclusive right to, among other things, develop
and commercialize a particular combination of ribozymes using a retroviral
vector for an HIV/AIDS therapeutic.  The Company must pay certain minimum
royalties prior to commercialization, and other royalties upon sales of
product.

         As a result of these licenses and sublicenses, and RPI's own internal
research, RPI has exclusive worldwide rights to at least 25 issued patents in
the United States, 3 patents granted in Europe, 1 patent granted in Japan and 3
issued patents in Australia.  In addition, Notices of Allowance have been
received for at least 16 patents from the United States Patent and Trademark
Office, for a total of at least 48 patents issued or allowed in the United
States and abroad.  Six of the 25 United States issued patents, 1 European
patent  and 1 Japanese patent cover the use of an enzymatic RNA to cleave a
single stranded RNA (the "Cech Patents").  The Company believes that the Cech
Patents grant the right to exclude others from practicing ribozyme technology
as it is currently known to the Company in the United States, Europe and Japan
irrespective of the application, the method of production, the method of
purification, or the ribozyme motif used.  Unless extended, the Ribozyme
Patents will expire in December 2008 in the United States and December 2007 in
Europe and in Japan.  The additional issued patents cover both ribozyme
technology (e.g., ribozyme design, synthesis, chemical modifications, delivery,
ribozyme motifs, vector production, target site selection) as well as
application to specific therapeutic targets.

         In addition, RPI has filed or holds exclusive licenses to more than
100 pending United States and  related foreign applications.  The Company's
patent portfolio includes approximately 40 United States applications for
various areas of interest in human therapeutics and diagnostics and certain
agricultural uses.  The portfolio also includes approximately 80 United States
applications related to the chemistry, design, optimization, manufacture, and
delivery of ribozyme products.

         The Company has filed opposition documents against two patents granted
to a competitor in Europe. Opposition proceedings against certain  European and
Japanese patents of the Company have been initiated by its competitors.  In
addition, interference proceedings against certain of the Company's other
patents and patent applications are anticipated in the U.S. The Company
believes that its patents and applications are soundly based, but the extent of
protection may vary in different countries and no assurance can be given that
any patent will provide commercially significant protection or will not be
challenged, invalidated, or circumvented.  However, litigation could be
necessary to protect the Company's patent position, which would result in
substantial cost to, and diversion of efforts by, the Company.

         Competitors or other patent holders could bring legal actions against
the Company involving the Company's patents, patent applications or rights to
use proprietary technology.  If any actions are successful, in addition to any
potential liability for damages, the Company could be enjoined from selling the
affected product, or be required to obtain a license in order to continue to
manufacture or market the product.  There can be no assurance that the Company
would prevail in any such action or that any license required under any such
patent would be made available on acceptable terms, if at all.  There has been,
and the Company believes that there will continue to be, significant litigation
in the pharmaceutical industry regarding patent and other intellectual property
rights.  Any additional litigation could consume a substantial portion of the
Company's resources regardless of the outcome.

         It is the Company's policy to require its employees, consultants,
members of its Scientific Advisory Board and parties to collaborative
agreements to execute confidentiality agreements upon the commencement of




                                     33
<PAGE>   35
employment or consulting relationships or a collaboration with the Company.
These agreements provide that all confidential information developed or made
known during the course of the relationship with the Company is to be kept
confidential and not disclosed to third parties except in specific
circumstances.  In the case of employees, the agreements provide that all
inventions resulting from work performed for the Company, utilizing property of
the Company or relating to the Company's business and conceived or completed by
the individual during employment shall be the exclusive property of the Company
to the extent permitted by applicable law.  There can be no assurance, however,
that these agreements will provide meaningful protection of the Company's trade
secrets or adequate remedies in the event of unauthorized use or disclosure of
such information.  See "Risk Factors--Uncertainty of Protection of Patents and
Proprietary Rights."


GOVERNMENT REGULATION

         The production and marketing of the Company's products and its
research and development activities are subject to regulation for safety,
efficacy and quality by numerous government authorities in the United States
and other countries.  In the United States, drugs are subject to rigorous FDA
regulation.  The Federal Food, Drug and Cosmetic Act, as amended and the
regulations promulgated thereunder, and other federal and state statutes and
regulations, govern, among other things the testing, manufacture, safety,
efficacy, labeling, storage, record keeping, approval, advertising and
promotion of the Company's human therapeutic products.  Product development and
approval within this regulatory framework takes a number of years and involves
the expenditure of substantial resources.

         The steps required before a pharmaceutical agent may be marketed in
the United States include (i) pre-clinical laboratory tests, in vivo
pre-clinical trials and formulation studies, (ii) the submission to the FDA of
an IND, which must become effective before human clinical trials commence,
(iii) adequate and well-controlled human clinical trials to establish the
safety and efficacy of the drug, (iv) the submission of an NDA to the FDA and
(v) FDA approval of the NDA prior to any commercial sale or shipment of the
drug.  In addition to obtaining FDA approval for each product, each drug
manufacturing establishment must be registered with, and approved by, the FDA.
Domestic manufacturing establishments are subject to biennial inspections by
the FDA and must comply with cGMP for both drugs and devices.  To supply
products for use in the US, foreign manufacturing establishments must comply
with cGMP and are subject to periodic inspection by the FDA or by regulatory
authorities in such countries under reciprocal agreements with the FDA.

         In addition to FDA requirements, the National Institutes of Health
("NIH") has established guidelines for research involving recombinant DNA
molecules, which are utilized by the Company and certain of its collaborators
and licensees in their research.  These guidelines apply to all recombinant DNA
research within the United States or its territories which is conducted at or
supported by the NIH.  Under current guidelines, proposals to conduct clinical
research involving gene therapy which is supported by the NIH must be reviewed
by the NIH Recombinant DNA Advisory Committee.  The Company's vector delivery
of ribozymes will need to be reviewed by this Committee.

         The FDA has also initiated procedures designed to provide broader
access to certain investigational drugs prior to marketing approval.  In 1987,
the FDA adopted regulations authorizing "treatment INDs" for investigational
drugs designed to treat serious and life-threatening diseases where no
satisfactory alternate therapies exist.  The sponsor of a treatment IND is
required to comply with the regular IND requirements, including institutional
review board approval and patient informed consent.  In addition, the sponsor
must be actively pursuing marketing approval for the investigational drug, and
may not promote the drug prior to marketing approval.

         Pre-clinical tests include laboratory evaluation of product chemistry
and formulation, as well as animal studies to assess the potential safety and
efficacy of the product.  Compounds must be formulated according to cGMP and
pre-clinical safety tests must be conducted by laboratories that comply with
FDA regulations regarding Good Laboratory Practices ("GLP").  The results of
the pre-clinical tests are submitted to the FDA as part of an IND and are
reviewed by the FDA prior to the commencement of human clinical trials.
Additional pharmacology and toxicology studies are generally conducted
concurrently with human clinical trials.

         Clinical trials involve the administration of the investigational new
drug to healthy volunteers or to patients, under the supervision of qualified
principal investigators.  Initial clinical trials are conducted in accordance




                                     34
<PAGE>   36
with Good Clinical Practices under protocols that detail the objectives of the
study, the parameters to be used to monitor safety and the efficacy criteria to
be evaluated.  Each protocol must be submitted to the FDA as part of the IND.
Further, each clinical study must be conducted under the auspices of an
independent Institutional Review Board ("IRB") at the institution at which the
study will be conducted.  The IRB will consider, among other things, ethical
factors, the safety of human subjects and the possible liability of the
institution.

         Clinical trials are typically conducted in three sequential phases,
but the phases may overlap.  In Phase I, the initial introduction of the drug
into healthy human subjects, the drug is tested for safety (adverse effects),
dosage tolerance, metabolism, distribution, excretion and pharmacokinetics
(clinical pharmacokinetics and pharmacology).  Phase II involves studies in a
limited patient population to (i) determine the efficacy of the drug for
specific, targeted indications, (ii) determine optimal dosage and (iii)
identify possible adverse effects and safety risks.  When a compound appears to
be effective and to have an acceptable safety profile in Phase II clinical
trials, Phase III clinical trials are undertaken to further evaluate and
confirm clinical efficacy and to further test for safety within an expanded
patient population at geographically dispersed clinical study sites.  There can
be no assurance that Phase I, Phase II or Phase III clinical trials will be
completed successfully within any specified time period, if at all, with
respect to any of the Company's products subject to such testing.  Furthermore,
the Company or the FDA may delay or suspend clinical trials at any time if it
is felt that the subjects or patients are being exposed to an unacceptable
health risk.

         The results of the pharmaceutical development, pre-clinical trials and
clinical trials are submitted to the FDA in the form of an NDA for approval of
the marketing and commercial shipment of the drug.  The testing and approval
process is likely to require substantial time and effort and there can be no
assurance that any approval will be granted on a timely basis, if at all.  The
FDA may deny an NDA if applicable regulatory criteria are not satisfied,
require additional testing or information, or require extensive post marketing
testing and surveillance to monitor the safety or efficacy of the Company's
products if they do not view the NDA as containing adequate evidence of the
safety and efficacy of the drug.  Notwithstanding the submission of such data,
the FDA may ultimately decide that the application does not satisfy its
regulatory criteria for approval.  Moreover, if regulatory approval of a drug
is granted, such approval may entail limitations on the indicated uses for
which it may be marketed.  Finally, product approvals may be withdrawn if
compliance with regulatory standards is not maintained or if problems occur
following initial marketing.

         Among the conditions for NDA approval is the requirement that the
prospective manufacturer's quality control and manufacturing procedures conform
to cGMP, which must be followed at all times.  In complying with standards set
forth in these regulations, manufacturers (including a drug sponsor's third
party contract manufacturers) must continue to expend time, money and effort in
the area of production and quality control to ensure full technical compliance.

         In addition to regulations enforced by the FDA, the Company also is
subject to regulation under the Occupational Safety and Health Act, the
Environmental Protection Act, the Toxic Substances Control Act, the Resource
Conservation and Recovery Act and other present and potential future federal,
state or local regulations.  The Company's research and development involves
the controlled use of hazardous materials, chemicals, viruses and various
radioactive compounds.  Although the Company believes that its safety
procedures for handling and disposing of such materials comply with the
standards prescribed by state and federal regulations, the risk of accidental
contamination or injury from these materials cannot be completely eliminated.
In the event of such an accident, the Company could be held liable for any
damages that result and any such liability could exceed the resources of the
Company.

         For marketing outside the United States, the Company will be subject
to foreign regulatory requirements governing human clinical trials and
marketing approval for drugs and devices.  The requirements governing the
conduct of clinical trials, product licensing, pricing and reimbursement vary
widely from country to country.  The Company does not currently have any
facilities or personnel outside the United States.  See "Risk
Factors--Uncertainty of Governmental Regulation" and "--Hazardous Materials."




                                     35
<PAGE>   37
SCIENTIFIC ADVISORY BOARD ("SAB")

         The Company is assisted in its research and development activities by
its SAB, composed of leading scientists who meet several times each year to
review the Company's research and development activities, discuss technological
advances relevant to the Company and its business and otherwise assist the
Company as appropriate.  In addition, the Company has collaborative
relationships with several SAB scientists that further advance the ribozyme
technology.  The members of the SAB are listed below:

Thomas Cech, Ph.D.                         Distinguished Professor, Department
                                           of Chemistry & Biochemistry,
                                           University of Colorado; Chairman,
                                           SAB


Edward Mocarski, Ph.D.                     Professor and Chairman, Departments
                                           of Microbiology & Immunology,
                                           Stanford University

Gary Nabel, M.D., Ph.D.                    Professor, Departments of Internal
                                           Medicine and Biological Chemistry,
                                           University of Michigan

Joan Steitz, Ph.D.                         Henry Ford II Professor of Molecular
                                           Biophysics and Biochemistry,
                                           Department of Biophysics and
                                           Biochemistry, Yale University

Bruce Sullenger, Ph.D.                     Assistant Professor, Departments of
                                           Experimental Surgery and Genetics,
                                           Duke University

Olke Uhlenbeck, Ph.D.                      Professor, Department of Chemistry
                                           and Biochemistry, University of 
                                           Colorado

         Each member of the Scientific Advisory Board has entered into an
exclusive consulting agreement with RPI in the field of ribozymes, whereby the
member agrees to provide research, investigation and consultation services to
the Company in exchange for an honorarium for meetings attended and the award
of stock options.  The scientific advisors are employed by employers other than
the Company and may have commitments to or consulting advisory contracts with
other entities that may limit their availability to the Company.  Although
generally each scientific advisor agrees not to perform services for another
person or entity which would create a conflict of interest with the scientific
advisor's services for the Company, there can be no assurance that such a
conflict will not arise.  Inventions or processes discovered by a scientific
advisor will not, unless otherwise agreed, become the property of the Company,
but will remain the property of the scientific advisor or his or her employers.
The Company has entered into confidentiality and non-disclosure agreements with
each SAB member.


EMPLOYEES

         As of June 30, 1997, the Company had 79 full-time employees, including
a technical scientific staff of 60.  There can be no assurance that the Company
will be able to continue to attract and retain qualified personnel in
sufficient numbers to meet its needs.  None of the Company's employees is
covered by collective bargaining arrangements and management considers
relations with its employees to be good.




                                     36
<PAGE>   38
FACILITIES

         RPI currently leases approximately 30,000 square feet of laboratory
and office space at 2950 Wilderness Place, Boulder, Colorado.  The Company
leases this space under an operating lease that lasts through 2007. The Company
believes that the existing facility will be sufficient to meet its needs
through 1998.


LEGAL PROCEEDINGS

         Other than the proceedings described under "Business--Patents and
Proprietary Technology," RPI is not a party to any legal proceedings.




                                     37
<PAGE>   39
                                   MANAGEMENT

EXECUTIVE OFFICERS AND DIRECTORS

         The executive officers and directors of the Company and their ages as
of August 22, 1997, are as follows:

   
<TABLE>
<CAPTION>
                   NAME                                    AGE                      POSITION
                   ----                                    ---                      --------
<S>                                                        <C>      <C>
Ralph E. Christoffersen, Ph.D.(1).......................    59      Chief Executive Officer, President and Director
Lawrence E. Bullock.....................................    41      Vice President of Administration and Finance, Chief
                                                                    Financial Officer and Secretary
Thomas H. Rossing, M.D...................................   47      Vice President of Product Development
Alene A. Holzman.........................................   40      Vice President of Business Development and General 
                                                                    Manager of Target Validation and Discovery Business
Nassim Usman, Ph.D.......................................   38      Vice President of Research
David T. Morgenthaler (1),(2)............................   78      Chairman of the Board
Jeremy L. Curnock Cook (3)...............................   48      Director
Anthony B. Evnin, Ph.D. (1),(3)..........................   56      Director
Charles M. Hartman (2)...................................   55      Director
Anders P. Wiklund (2),(3)................................   57      Director
</TABLE>
    

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

(1)      Member of the Executive Committee.
   
(2)      Member of the Compensation Committee.
    
   
(3)      Member of the Audit Committee.
    

         RALPH E. CHRISTOFFERSEN, PH.D. has served as Chief Executive Officer,
President and Director of RPI since June 1992.  Prior to joining the Company,
Dr.  Christoffersen was Senior Vice President and Director of U.S. Research at
SmithKline Beecham Pharmaceuticals from 1989 to June 1992, and prior to that,
held senior management positions in research at The Upjohn Company from 1983 to
1989.  Prior to joining The Upjohn Company, Dr.  Christoffersen served as a
Professor of Chemistry and Vice Chancellor for Academic Affairs at the
University of Kansas, and as President of Colorado State University.  He
received his Ph.D. in physical chemistry from Indiana University.

         LAWRENCE E. BULLOCK has served as Vice President of Administration and
Finance, Chief Financial Officer and Secretary since January 1996.  Prior to
joining RPI, Mr. Bullock was Chief Financial Officer, Director of Finance and
Administration and Secretary of La Jolla Pharmaceutical Company, a
biopharmaceutical company, from December 1990 to January 1996.  Mr. Bullock
received his M.B.A. from the University of Utah in 1980.

         THOMAS H. ROSSING, M.D. has served as Vice President of Product
Development since July 1997.  Prior to joining the Company, Dr. Rossing was
Vice President of Clinical Development and Regulatory Affairs at Gene Medicine,
Inc. from July 1996 to July 1997.  Prior to that, Dr. Rossing was Director of
International Respiratory Clinical Research at Glaxo Wellcome from March 1993
to July 1996, Director of Clinical Pharmacology and Worldwide Regulatory
Liaison at Merck Research Laboratories and a staff physician at Brigham and
Women's Hospital in Boston, Massachusetts.  He received his M.D. degree from
Harvard University.

   
         ALENE A. HOLZMAN has served as Vice President of Business Development
and General Manager of Target Validation and Discovery Business since April 
1997.  Prior to joining the Company, Ms. Holzman was Vice President of ChemTrak
Corporation, a medical technology firm, from January 1990 to March 1997 where
she was responsible for Finance, Business Development and Marketing and Sales.
From 1987 to 1990, she was Vice President of CytoSciences, Inc., a biomedical
company and from 1981 to 1987 she was Vice President of Marketing and Sales for
Hana Biologics, Inc. (now Cell Genesys Corporation), a publicly held
biotechnology firm.  Ms. Holzman received her M.B.A from the University of
California at Berkeley.
    




                                      38
<PAGE>   40
         NASSIM USMAN, PH.D.  has served as Vice President of Research of RPI
since May 1996.  From April 1994 until May 1996 Dr. Usman served as Director of
Chemistry and Biochemistry Research at the Company and from September 1992
until April 1994, Dr. Usman served as Senior Scientist in Chemistry and
Biochemistry of RPI.  Prior to joining RPI, Dr. Usman was a Postdoctoral Fellow
and Scientist in the Departments of Biology and Chemistry at the Massachusetts
Institute of Technology from January 1987 to September 1992.  Dr. Usman
received his Ph.D.  in chemistry from McGill University.

         DAVID T. MORGENTHALER has served as a director of RPI since February
1992 and was elected Chairman of the Board in December 1995.  Mr. Morgenthaler
was a founder of, and has been Managing Partner of Morgenthaler Ventures, a
private venture capital firm, since 1968.  He has been a director of a
substantial number of public and private companies.  Mr.  Morgenthaler received
his M.S. degree from the Massachusetts Institute of Technology.

   
         JEREMY L. CURNOCK COOK has served as a Director of RPI since July 1995.
Mr. Cook is a Director of Rothschild Asset Management and has been responsible
for the Rothschild Bioscience Unit since 1987.  Mr. Cook founded the
International Biochemicals Group in 1975 which he subsequently sold to Royal
Dutch Shell in 1985, remaining as Managing Director until 1987.  He is also a
director of The International Biotechnology Trust plc, Creative BioMolecules
Inc., Targeted Genetics Inc., Cantab Pharmaceuticals plc, and Biocompatibles
International plc.  Mr. Cook holds an M.A. in Natural Sciences from Trinity
College Dublin.
    

         ANTHONY B. EVNIN, PH.D.  has served as a Director of RPI since
February 1992.  Dr.  Evnin has been a General Partner of Venrock Associates, a
venture capital partnership, since 1975.  He is also a director of Arris
Pharmaceutical Corporation, Centocor, Inc., SUGEN, Inc., Opta Food Ingredients,
Inc., Kopin Corporation and Triangle Pharmaceuticals, Incorporated.  Dr.  Evnin
received his Ph.D. from the Massachusetts Institute of Technology.

         CHARLES M. HARTMAN has served as a Director of RPI since February
1992.  He has been a General Partner of CW Group, a venture capital
partnership, since 1983.  From 1965 to 1983 Mr. Hartman held a number of
positions with Johnson & Johnson.  He is a director of SUGEN, Inc.

         ANDERS P. WIKLUND has served as a Director of RPI since August 1994.
Mr. Wiklund has been with Biacore Holdings Inc., since January 1997, where he
is Senior Vice President.  Previously, from 1967 through 1996, Mr. Wiklund
served in numerous executive positions for the Kabi and Pharmacia group of
companies, including President and CEO of Kabi Vitrum Inc., and Kabi Pharmacia,
Incorporated.  Mr. Wiklund is also a director of Trega Bioscience, Inc.,
Medivir, A.B., InSite Vision, Inc., and Vascular Therapeutics, Incorporated.
Mr. Wiklund graduated from the Pharmaceutical Institute in Stockholm, where he
received a Master of Pharmacy degree.

   
    


COMMITTEES

   
         The Executive Committee consists of Drs. Evnin and Christoffersen and
Mr. Morgenthaler.  The Board of Directors has delegated its power and authority
to manage and operate the Company in the ordinary course of business to the
Executive Committee and to do all things that the Board of Directors is
authorized to do except to approve certain extraordinary corporate transactions
which power is reserved to the Board in the Company's bylaws.
    

   
    

         The Compensation Committee consists of Messrs. Hartman, Morgenthaler
and Wiklund.  The Compensation Committee reviews and recommends for Board
approval the Company's option plans and makes




                                      39
<PAGE>   41
policy decisions concerning salaries and incentive compensation for employees
and consultants of the Company, and reviews and recommends for Board approval
compensation for executive officers.

   
         The Audit Committee consists of Dr.  Evnin and Messrs. Cook and
Wiklund.  The Audit Committee makes recommendations to the Board regarding the
selection of independent auditors, reviews the results and scope of the audit
and other services provided by the Company's independent auditors and reviews
and evaluates the Company's audit and control functions.
    

DIRECTORS' COMPENSATION

         Effective  March 1997, Directors of the Company who are not salaried
officers or employees receive a fee of $1,000 per day for each Board or
committee meeting attended and $500 per day for participation in a telephonic
meeting of the Board or a Board committee. Effective May 1997 nonemployee
directors also receive stock options to purchase 5,000 shares of Common Stock
annually under the Company's 1996 Stock Option Plan. In 1996, Board members
received no compensation for service on the Board or Board committees, except
that Mr. Wiklund received $1,000 for each Board meeting attended and stock
options to purchase 4,444 shares of Common Stock. Directors may also be
reimbursed for certain expenses in connection with attendance at Board and
committee meetings.


EXECUTIVE COMPENSATION

   
         The following table sets forth information concerning all compensation
received for services rendered in all capacities to the Company for the three
years ended December 31, 1996, by Dr. Christoffersen, the Company's CEO and
President, and by the two other executive officers of the Company, Mr. Bullock
and Dr. Usman, whose total annual salary and bonus exceeded $100,000 for the
year ended December 31, 1996 (the "Named Executive Officers").  No stock 
appreciation rights were granted to the Named Executive Officers in such years.
    




                                      40
<PAGE>   42
                           SUMMARY COMPENSATION TABLE

   
<TABLE>
<CAPTION>
                                                                                         LONG TERM              
                                              ANNUAL COMPENSATION                      COMPENSATION 
                                   -----------------------------------------      -----------------------
                                                                                                  SHARES
                                                                                                  UNDER-
                                                                                                   LYING
                                                                     OTHER         RESTRICTED     OPTIONS
                                                                     ANNUAL          STOCK        GRANTED    ALL OTHER
   NAME AND PRINCIPAL POSITION     YEAR     SALARY ($)  BONUS ($) COMPENSATION ($) AWARDS ($)       (#)   COMPENSATION ($)
- --------------------------------------------------------------------------------------------------------------------------
  <S>                              <C>       <C>         <C>        <C>             <C>             <C>      <C>
  Ralph E. Christoffersen, Ph.D.   1996      247,248         --     70,000(1)       188,100(2)     97,770   153,910(2)
  Chief Executive Officer and      1995      244,614     50,000     50,000(1)          --             --        --
  President                        1994      234,886     25,000     25,000(1)          --             --        --
                                                                  
  Lawrence E. Bullock              1996      118,433     15,000     24,993(3)          --          66,000       --
  Vice President of                                               
  Administration and Finance,                                     
  CFO and Secretary                                              
                                                                  
  Nassim Usman, Ph.D.              1996      132,919     25,000     20,499(4)          --          53,892       --
  Vice President of Research       1995      101,652      8,650        --              --           8,332       --
                                   1994       93,304      8,550        --              --           5,332       --
</TABLE>
    

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

(1) Amounts include:  $50,000, $50,000 and $25,000 in 1996, 1995 and 1994,
    respectively, of forgiveness of a loan made by the Company to Dr.
    Christoffersen in 1992 related to relocation expenses.  In addition, the
    Company compensated Dr. Christoffersen $20,000 in 1996 to assist him with
    the tax liability relating to the loan forgiveness.  See
    "Management--Employment Agreements."
(2) Amounts relate to a bonus of $342,010 payable $153,910 in cash and $188,100
    in shares of Common Stock at the Company's initial public offering price
    (18,810 shares at an initial public offering price of $10.00 per share)
    upon closing of the Company's initial public offering in April 1996.  See
    "Management--Employment Agreements."
(3) Amount includes $9,058 representing imputed interest related to a loan of
    $75,000 made by the Company to Mr. Bullock in 1996 relating to relocation
    expenses.  Amount also includes $15,935 to reimburse Mr. Bullock for his
    costs in connection with his relocation from California.  See
    "Management--Employment Agreements."
   
(4) Amount represents imputed interest, grossed-up for tax purposes, related to
    an interest-free loan of $75,000 made to Dr. Usman in 1996.  See
    "Management--Employment Agreements."
    




                                      41
<PAGE>   43
EMPLOYMENT AGREEMENTS

         In May 1992 the Company entered into an Employment Agreement (the
"Christoffersen Agreement") with Ralph E.  Christoffersen, Ph.D., the Company's
President and Chief Executive Officer, which, as amended, currently provides
for (i) an annual salary of $269,500, (ii) an annual performance-based cash
bonus of up to $80,000, (iii) a performance based cash bonus of $25,000,
received in 1997, (iv) an interest-free loan of $250,000 given in 1992,
which currently has an outstanding balance of $25,000 as of June 30, 1997,
which will be forgiven if Dr. Christoffersen remains an employee of the Company
through December 31, 1997, and if such is the case, Dr. Christoffersen will be
paid an amount equal to the taxes payable by him on such loan forgiveness, (v)
repayment of certain relocation expenses, (vi) the grant of options to acquire
74,444 shares of Common Stock at an exercise price of $0.45 per share, which
option vests ratably over five years, (vii) the grant of options to acquire
31,446 shares of Common Stock at an exercise price of $0.45 per share, which
options vested upon the Company's completion of certain performance milestones,
(viii) the grant of options in January 1996 to acquire 18,887 shares of Common
Stock at an exercise price of $2.70, which options vest upon the completion of
certain performance milestones, (ix) the grant of options in September 1996
to acquire 20,000 shares of Common Stock at an exercise price of $11.85, which
options vest upon the completion of certain performance milestones, (x) the
grant of options in September 1996 to acquire 55,550 shares of Common Stock at
an exercise price of $11.85 per share, which options vest ratably over five
years, (xi) the grant of options in January  1997 to acquire 24,450 shares of
Common Stock at an exercise price of $11.06 per share, which options vest
ratably over five years, (xii) the grant of options in March 1997 to acquire
60,000 shares of Common Stock at an exercise price of $10.75 per share, which
options vest upon the completion of certain performance milestones, and (xiii) a
bonus of $342,010, which was paid in cash and Common Stock upon the completion
of the Company's initial public offering in April 1996. The Christoffersen
Agreement is subject to termination upon Dr. Christoffersen's death, disability
or for cause (as defined in the Christoffersen Agreement).  In the event of the
termination of Dr.  Christoffersen's employment with the Company, he is
entitled to receive all accrued salary and benefits up to the time of his
termination and, unless he has been terminated for cause, nine months of
severance pay at the same monthly rate as in effect at the time of his
termination.  If termination occurs after January 1, 2000, Dr. Christoffersen
shall be paid a lump sum cash payment of up to $27,500.

         In January 1996 the Company entered into an employment agreement with
Lawrence E. Bullock, the Company's Vice President of Administration and
Finance, Chief Financial Officer and Secretary, which, as amended, currently
provides for (i) an annual salary of $136,250, (ii) an annual performance-based
cash bonus of up to $25,000, (iii) a signing bonus of $15,000, (iv) the grant
of  options to acquire 16,666 shares of Common Stock at an exercise price of
$2.70 per share, which options vest ratably over five years or upon a change of
control of the Company, (v) the grant of  options to acquire 5,555 shares of
the Common Stock at an exercise price of $2.70 per share which option vests
subject to Mr.  Bullock remaining with the Company for at least two years (vi)
the grant of options in September 1996 to acquire 33,779 shares of Common Stock
at an exercise price of $11.85 per share, which options vest ratably over five
years, (vii) the grant of options in December 1996 to acquire 10,000 shares of
Common Stock at an exercise price $11.25, which options vest ratably over five
years, (viii) the grant of options in March 1997 to acquire 20,000 shares of
Common Stock at an exercise price of $10.75 per share, which options vest upon
the completion of certain performance milestones and (ix) repayment of certain
relocation expenses including an interest-free loan of $75,000, given in 1996,
which is forgivable in five equal installments, grossed-up for taxes, as long
as Mr. Bullock remains employed by the Company.  In the event of Mr. Bullock's
termination without cause, he will be entitled to six months' severance pay at
his then current salary.

         In May 1996 the Company entered into an employment agreement with
Nassim Usman, Ph.D., the Vice President of Research, which, as amended,
currently provides for (i) an annual salary of $158,000, (ii) an annual
performance-based cash bonus of up to $25,000, (iii) the grant of options to
acquire 17,000 shares of Common Stock at an exercise price of $15.25, of which
7,000 shares vest upon the completion of certain performance milestones and
options for 10,000 shares vest ratably over five years, (iv) payment by the
Company of the exercise price of certain vested options on each year's
anniversary of Dr. Usman's appointment, up to $15,000 per year for a total of
five years, as long as Dr. Usman is employed by the Company, satisfactory
performance is maintained and shares acquired are not sold until one year after
the five year period has ended, (v) the grant of options in September 1996 to
acquire 26,892 shares of the Common Stock at an exercise price of $11.85 per
share, which options vest ratably over five years, (vi) the grant of options in
December 1996 to acquire 10,000 shares of the Common Stock at an exercise price
of $11.25 per share, which options vest ratably over five years, (vii) the grant
of options in March 1997 to acquire 20,000 shares of Common Stock at an exercise
price of $10.75, which options vest upon the completion of certain performance
milestones, and (viii) an interest-free loan of $75,000, given in May 1996,
which




                                      42
<PAGE>   44
is forgivable in five equal installments, grossed-up for taxes, as long as Dr.
Usman remains employed by the Company.  In the event of Dr. Usman's termination
of employment by the Company without cause, he will be entitled to six months'
severance pay at his then current salary.

         In February 1997 the Company entered into an employment agreement with
Alene A. Holzman, the Company's Vice President of Business Development and
General Manager of Target Validation and Discovery Business, which provides for
(i) an annual salary of $150,000, (ii) an annual performance-based cash bonus
of up to $30,000, (iii) the grant of options to acquire 60,000 shares of Common
Stock at an exercise price of $10.50, of which the options for 30,000 shares
vest upon the completion of certain performance milestones and the options for
30,000 shares vest ratably over five years, and (iv) an interest-free loan of
$75,000, given in June 1997, of which 33% will be forgiven annually, beginning
on the first anniversary of Ms. Holzman's employment by the Company, as long as
she is employed by the Company.  In the event of Ms. Holzman's termination of
employment by the Company without cause, she will be entitled to six months'
severance pay at her then current salary.

         In July 1997 the Company entered into an employment agreement with
Thomas H. Rossing, M.D., the Company's Vice President of Product Development,
which provides for (i) an annual salary of $245,000, (ii) an annual
performance-based cash bonus of up to $45,000, of which $20,000 is guaranteed
as long as employment continues past December 31, 1997, (iii) the grant of
options to acquire 100,000 shares of Common Stock at an exercise price of
$8.50, of which the options for 50,000 shares vest upon the completion of
certain performance milestones and the options for 50,000 shares vest ratably
over five years, and (iv) an interest-free loan of $100,000, available upon
request, of which 33% will be forgiven annually, beginning on the first
anniversary of Dr. Rossing's employment by the Company, as long as he is
employed by the Company.  In the event of Dr. Rossing's termination of
employment by the Company without cause, he will be entitled to six months'
severance pay at his then current salary.


STOCK OPTION PLAN

         The Company's Incentive Stock Option Plan and the Non-Qualified Stock
Option Plan were adopted by the Board of Directors in December 1992
(collectively the "1992 Plans").  In March 1996 the Company amended, restated
and merged the 1992 Plans and named the resulting plan the 1996 Stock Option
Plan (the "Plan").  Under the Plan, 1,667,154 shares of Common Stock are
currently reserved for issuance upon exercise of options granted to employees,
officers and consultants of the Company.  The Plan will terminate in January
2006, unless sooner terminated by the Board of Directors.  The purpose of the
Plan is to attract and retain qualified personnel, to provide additional
incentives to employees, officers, directors and consultants of the Company; and
to promote the success of the Company's business.  Pursuant to the Plan, the
Company may grant or issue incentive stock options and supplemental
(non-qualified) stock options to consultants, employees, officers and directors.

         The Plan provides for the grant of both incentive stock options
intended to qualify as such under Section 422 of the Internal Revenue Code of
1986, as amended, and non-statutory stock options.  The Board has delegated
administration of the Plan to a Compensation Committee comprised of three
independent directors. See "Management--Committees."  Subject to the
limitations set forth in the Plan, the Board or the Compensation Committee has
the authority to select the persons to whom grants are to be made, to designate
the number of shares to be covered by each option, to determine whether an
option is to be an incentive stock option or a non-statutory stock option, to
establish vesting schedules, and, subject to certain restrictions, to specify
the type of consideration to be paid upon exercise and to specify other terms
of the options.

         The maximum term of options granted under the Plan is ten years (five
years for an incentive option granted to a person who at that time owns 10
percent of the total combined voting power of all classes of stock).  The
aggregate fair market value of the stock with respect to which incentive stock
options are first exercisable in any calendar year may not exceed $100,000 per
optionee; portions in excess of such amount shall be treated as nonstatutory
stock options.  Options granted under the Plan are non-transferable and
generally expire upon the earlier of the stated expiration date or three months
after the termination of an optionee's service to the Company (18 months in the
event the optionee's employment terminates by reason of death and 12 months in
the event the optionee's employment terminates due to disability, or such
longer or shorter period specified in the option agreement).




                                      43
<PAGE>   45
         The Board has discretion in connection with a merger, consolidation,
reorganization or similar corporate event where the Company is the surviving
corporation to prescribe the terms and conditions for the modifications of the
options granted under the Plan.  In the event of a dissolution or liquidation
of the Company, or a merger or consolidation in which the Company is not the
surviving corporation, all outstanding options will terminate unless assumed by
another corporation.

         No specific vesting schedule is required under the Plan.  The exercise
price of incentive stock options must equal at least the fair market value of
the Common Stock on the date of grant, except that the exercise price of
incentive stock options granted to any person who at the time of grant owns
stock possessing more than 10 percent of the combined voting power of all
classes of stock must be at least 110 percent of the fair market value of such
stock on the date of grant.  The exercise price on non-statutory stock options
under the Plan may be no less than 85 percent of the fair market value of the
Common Stock on the date of grant.


   
         The following table presents certain information concerning individual
grants of stock options that were made under the Plan during 1996 to each of the
Named Executive Officers.  The table also sets forth the potential realizable
values for the stock options based on future appreciation assumptions.  There
can be no assurance that the values shown in this table will be achieved.  No
stock appreciation rights were granted in 1996.
    

                          OPTION GRANTS IN FISCAL 1996

   
<TABLE>
<CAPTION>
                                                                                             
                                           INDIVIDUAL GRANTS                                 
                               -------------------------------------                         
                                                                                             
                                NUMBER OF     % OF TOTAL                OPTION               
                                SECURITIES     OPTIONS                   DATE                
                                UNDERLYING    GRANTED TO   EXERCISE     MARKET               
                                 OPTIONS      EMPLOYEES    PRICE PER    VALUE      EXPIRATION
             NAME              GRANTED (#)    IN 1996(1)   SHARE ($)    ($)(2)        DATE   
- ---------------------------------------------------------------------------------------------
 <S>                                <C>          <C>        <C>         <C>         <C>      
 Ralph E. Christoffersen, Ph.D.      22,220(3)    4.6        2.70       10.00       01/03/06 
                                     20,000(3)    4.1       11.85       11.88       09/20/06 
                                     55,550      11.4       11.85       11.88       09/20/06 
                                    -------      ----                                        
                                     97,770      20.1                                        
                                    =======      ====                                        
                                                                                             
 Lawrence E. Bullock                 16,666       3.4        2.70       10.00       01/23/06 
                                      5,555(3)    1.1        2.70       10.00       01/23/06 
                                     33,779       6.9       11.85       11.88       09/20/06 
                                     10,000       2.1       11.25       11.25       12/06/06 
                                    -------       ---                                        
                                     66,000      13.5                                        
                                    =======      ====                                        
                                                                                             
 Nassim Usman, Ph.D.                  7,000(3)    1.4       15.25       15.25       05/10/06 
                                     10,000       2.1       15.25       15.25       05/10/06 
                                     26,892       5.5       11.85       11.88       09/20/06 
                                     10,000       2.1       11.25       11.25       12/06/06 
                                    -------       ---                                                               
                                     53,892      11.1
                                    =======      ====
</TABLE>
    

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

   
    

(1)      The Company granted options representing an aggregate of 487,208
         shares to employees of the Company in 1996 under the Plan.
(2)      Options granted prior to the Company's initial public offering in
         April 1996 (exercise price: $2.70) are valued at $10.00 per share for
         stock price appreciation purposes.  Options granted at $11.85 per
         share are valued based on a ten-day average prior to grant date.
   
(3)      The options were granted under the 1996 Stock Option Plan, as amended,
         and become 100% vested upon the completion of certain performance
         milestones.  All other options granted vest in increments of 20% over
         a five year period.  The term of option grants are ten years from the
         date of grant.
    



                                      44
<PAGE>   46
   
         The following table sets forth certain information with respect to the
exercise of options to purchase Common Stock in 1996 and the unexercised
options held at December 31, 1996, and the value thereof, by the Named
Executive Officers.
    


    AGGREGATED OPTIONS EXERCISED IN 1996 AND DECEMBER 31, 1996 OPTION VALUES

   
<TABLE>
<CAPTION>
                                                               NUMBER OF SECURITIES 
                                                              UNDERLYING UNEXERCISED        VALUE OF UNEXERCISED
                                  SHARES                            OPTIONS AT            IN-THE-MONEY OPTIONS AT
                                ACQUIRED ON     VALUE            DECEMBER 31, 1996          DECEMBER 31, 1996 (1)
             NAME                EXERCISE     REALIZED(1)    EXERCISABLE/UNEXERCISABLE    EXERCISABLE/UNEXERCISABLE
             ----                ---------    ----------    -------------------------    -------------------------
 <S>                              <C>          <C>               <C>                       <C>
 Ralph E. Christoffersen, Ph.D.   76,112       $ 802,982         30,443 / 93,772           $ 286,177 / $ 184,743
 Lawrence E. Bullock                --             --                 0 / 66,000            $      0 / $ 184,434
 Nassim Usman, Ph.D.                --             --             6,446 / 63,554            $ 57,259 / $  78,136
</TABLE>
    

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

(1)      Represents the market value based upon the closing price per share of
         Common Stock as quoted on the Nasdaq National Market on December 31,
         1996 ($11.00 per share), less the option exercise price.


401(k) PLAN

         As part of its effort to attract and maintain high quality staff, the
Company adopted a 401(k) Salary Reduction Plan and Trust (the "401(k) Plan") on
June 1, 1992, pursuant to which participating employees may quarterly
contribute up to a maximum of 20 percent of their salary. All funds withheld
from employees are paid to a trustee who invests for the benefit of members of
the 401(k) Plan. The 401(k) Plan provides  that the Company may match the
employee's contributions with Common Stock.


EMPLOYEE STOCK PURCHASE PLAN

         In March 1996 the Company adopted an Employee Stock Purchase Plan (the
"Purchase Plan"), authorizing the issuance of 300,000 shares of Common Stock
pursuant to purchase rights granted to employees of the Company.  The Purchase
Plan provides a means by which employees purchase Common Stock of the Company
through payroll deductions.  The Purchase Plan is implemented by offerings of
rights to eligible employees.  Generally, each offering is twenty-four months'
duration with purchases occurring on each October 31 and April 30 during each
offering (except that April 30, 1996, was not a purchase date).  The initial
offering began on April 11, 1996, and will terminate April 30, 1998.  Common
Stock is purchased for accounts of employees participating in the Purchase Plan
at a price per share equal to the lower of (i) 85 percent of the fair market
value of a share of Common Stock on the date of commencement of participation in
the offering or (ii) 85 percent of the fair market value of a share of Common
Stock on the date of purchase.  Generally, all regular employees, including
executive officers, may participate in the Purchase Plan and may authorize
payroll deduction of up to 15 percent of their base compensation for the
purchase of stock under the Plan.  The Company's Board of Directors has the
authority to terminate the Purchase Plan at its discretion.


LIMITATION OF LIABILITY AND INDEMNIFICATION MATTERS

         The Company's Bylaws provide that the Company will indemnify its
directors and executive officers and may indemnify its other officers,
employees and other agents to the fullest extent permitted by Delaware law.
The Company is also empowered under its Bylaws to enter into indemnification
contracts with its directors and officers and to purchase insurance on behalf
of any person it is required or permitted to indemnify.

         In addition, the Company's Certificate of Incorporation provides that,
to the fullest extent permitted by Delaware law, the Company's directors will
not be liable for monetary damages for breach of the directors' fiduciary duty
of care to the Company and its stockholders.  This provision in the Certificate
of Incorporation does not eliminate the duty of care, and in appropriate
circumstances equitable remedies such as an injunction or other forms




                                      45
<PAGE>   47
of non-monetary relief would remain available under Delaware law.  Each
director will continue to be subject to liability for breach of the director's
duty of loyalty to the Company, for acts or omissions not in good faith or
involving intentional misconduct, for knowing violations of law, for any
transaction from which the director derived an improper personal benefit, for
improper transactions between the director and the Company and for improper
distributions to stockholders and loans to directors and officers.  This
provision also does not affect a director's responsibilities under any other
laws, such as the federal securities laws or state or federal environmental
laws.

         There is no pending litigation or proceeding involving a director or
officer of the Company as to which indemnification is being sought, nor is the
Company aware of any pending or threatened litigation that may result in claims
for indemnification by any director or officer.


                              CERTAIN TRANSACTIONS

         As of June 30, 1997 and in connection with the hiring of Dr.
Christoffersen, Mr. Bullock, Ms. Holzman and Dr.  Usman, the Company has made
the following interest-free loans to each individual. See "Management--
Employment Agreements."

<TABLE>
<CAPTION>
          NAME                     LOAN AMOUNT           REMAINING BALANCE(1)
          ----                     -----------           --------------------
<S>                                <C>                        <C>
Ralph E. Christoffersen, Ph.D....  $250,000(2)                $25,000
Lawrence E. Bullock..............    75,000(3)                 60,000
Alene Holzman....................    75,000                    75,000
Nassim Usman, Ph.D...............    75,000(3)                 60,000
</TABLE>

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

(1)      As of June 30, 1997.
(2)      The Company forgave (i) $50,000 of the outstanding principal amount in
         June 1993, (ii) $25,000 of the outstanding principal amount in January
         1994, (iii) $50,000 of the outstanding principal amount in January
         1995, (iv) $50,000 of the outstanding principal amount in January
         1996, and (v) $50,000 of the outstanding principal amount in January
         1997.
(3)      The Company forgave $15,000 of the outstanding principal amount in
         April 1997 and June 1997, respectively, for Dr. Usman and Mr. Bullock.

   
         BioHoldings, Inc., an Ohio corporation ("BioHoldings"), purchased
748,433 shares of Common Stock for $0.214 per share on February 7, 1992.
Thomas A. Mann, one of the founders and a former director of the Company, held
a controlling interest in BioHoldings.  At the time of the Company's initial
public offering in April 1996, pursuant to certain rights granted in the
Stockholders Agreement dated February 7, 1992, between the Company, BioHoldings
and certain investors, BioHoldings merged with the Company and the shareholders
of BioHoldings received 778,002 shares of Common Stock in exchange for their
shares of BioHoldings stock.  H. Axel Schupf, one of the Company's former
directors, and Mr. Mann received 19,450 and 420,510 shares of Common Stock, 
respectively, in exchange for their BioHoldings stock.  Mr. Schupf and Robert 
A. Paul, also a former director of the Company, were directors of BioHoldings.
    

         Chiron and the Company granted each other licenses to certain
technologies and agreed to undertake research activities pursuant to the
Collaborative Research, Development and Commercialization Agreement dated as of
July 15, 1994, Chiron (i) purchased 100,000 shares of Common Stock for a
purchase price of $3.60 per share, (ii) purchased 107,095 shares of the
Company's Series E Preferred Stock for a purchase price of $37.35 per share,
and (iii) purchased a warrant at a price of $4.50 per warrant share (for which
Chiron has paid $0.45 per warrant share), exercisable for 444,444 shares of
Common Stock for an exercise price of $40.50 per share.  In February 1996, the
Company amended the warrant issuable to Chiron to reduce the exercise price
from $40.50 per share to $22.50 per share.  At the time of the closing of the
Company's initial public offering in April 1996, Chiron (i) purchased 377,202
shares of Common Stock for $3,640,000 at the initial public offering price
less one-half of the underwriting discount, (ii) paid the Company $1,800,000 to
complete the purchase of its warrant, and (iii) received 35,127 additional
shares of Common Stock pursuant to antidilutive provisions.




                                      46
<PAGE>   48
   
         In May 1996 the Company entered into a collaboration with Chiron for
the use of ribozymes to characterize gene function.  The collaboration gives
Chiron the right to develop and commercialize products that result from the
collaboration, and entitle the Company to receive product development milestone
payments and royalties on sales of any such commercial products.  Chiron and the
Company each pay a portion of the research and development expenses of the
collaboration, and the Company agreed to provide Chiron $1.8 million, which was
paid in 1996, for research funding related to the collaboration.
    

         The Company believes that the foregoing transactions were in its best
interests.  As a matter of policy, these transactions were, and all future
transactions between the Company and any of its officers, directors or
principal stockholders will be, approved by a majority of the independent
members of the Board of Directors, will be on terms no less favorable to the
Company than could be obtained from unaffiliated third parties and will be in
connection with bona fide business purposes of the Company.




                                      47
<PAGE>   49
                             PRINCIPAL STOCKHOLDERS

         The following table sets forth information with respect to the
beneficial ownership of Common Stock as of August 22, 1997, and as adjusted to
reflect the sale by the Company of the 1,400,000 shares offered hereby (i) each
person known by the Company to own beneficially more than 5% of the outstanding
Common Stock, (ii) each current director of the Company, (iii) each of the
Named Executive Officers and (iv) all executive officers and directors of the
Company as a group.  Except as otherwise indicated, each of the persons named
below has sole voting and investment power with respect to the Common Stock
owned by them.  Shares of Common Stock subject to options, warrants and
convertible notes currently exercisable or convertible, or exercisable or
convertible within 60 days of August 22, 1997, are deemed outstanding for
computing the percentage of the person or entity holding such securities but
are not outstanding for computing the percentage of any other person or entity.

   
<TABLE>
<CAPTION>
                                                                              Percentage Beneficially
                                                                                       Owned
                                                                              ----------------------
                                                Shares Beneficially            Before         After
             Name                                      Owned                  Offering      Offering
             ----                               --------------------          --------      --------
 <S>                                                  <C>                         <C>         <C>
 Chiron Corporation(1)...................             1,063,868                   13.9%       11.8%
   4560 Horton Street                                                                         
   Emeryville, California 94608                                                               
                                                                                              
 International Biotechnology Trust plc...               737,633                   10.2         8.6
   c/o Rothschild Asset Management, Ltd.                                                      
   Five Arrows House                                                                          
   St. Swithin's Lane                                                                         
   London EC4N 8NR England                                                                    
                                                                                              
 Morgenthaler Venture Partners III(2)....               372,874                    5.0         4.3
   700 National Bank Building                                                                 
   Cleveland, Ohio  44114                                                                     
                                                                                              
 Ralph E. Christoffersen, Ph.D.(3).......               158,031                    2.2         1.8
                                                                                              
 Jeremy L. Curnock Cook(4)...............               737,633                   10.2         8.6
                                                                                              
 Anthony B. Evnin, Ph.D.(5)..............               315,773                    4.4         3.7
                                                                                              
 Charles M. Hartman(6)...................               251,917                    3.5         2.9
                                                                                              
 David T. Morgenthaler(2)................               372,874                    5.2         4.3
                                                                                              
 Anders P. Wiklund(7)....................                 4,444                      *           *
                                                                                              
 Lawrence E. Bullock(8)..................                13,058                      *           *
                                                                                              
 Nassim Usman, Ph.D.(9)..................                16,036                      *           *
                                                                                              
 Executive officers and directors        
 as a group (10 persons)(10).............             1,869,766                   25.6%       21.5%
</TABLE>
    

- ----------------------------             
*        Less than 1 percent.
   
(1)      Includes 444,444 shares of Common Stock issuable upon exercise of
         warrants outstanding as of August 22, 1997.  See "Description of
         Capital Stock--Warrants."
    




                                      48
<PAGE>   50
   
    
(2)      Includes 362,874 shares held by Morgenthaler Venture Partners III and
         10,000 shares held by Morgenthaler Family Partnership, both
         partnerships of which Mr. Morgenthaler is a general partner.  Mr.
         Morgenthaler disclaims beneficial ownership of such shares except to
         the extent of his general partnership interests therein.
(3)      Includes 3,333 shares of Common Stock owned by Dr. Christoffersen's
         daughter in which Dr. Christoffersen disclaims beneficial ownership.
         Amount also includes options to purchase 66,442 shares of Common
         Stock exercisable within 60 days of August 22, 1997.
   
(4)      Includes 737,633 shares held by The International Biotechnology Trust
         plc, for which Rothschild Asset Management, Ltd. ("Rothschild") acts
         as investment advisor.  Mr. Cook is a director of Rothschild and The
         International Biotechnology Trust plc, but disclaims beneficial 
         ownership of such shares.
    
(5)      Includes 218,022 shares held by Venrock Associates and 97,751 shares
         held by Venrock Associates II, L.P.  (together "Venrock").  Mr. Evnin
         is a general partner of Venrock and disclaims beneficial ownership of
         such shares except to the extent of his general partnership interests
         therein.
(6)      Includes 206,732 shares held by CW R&D Fund II, L.P. and 45,185 shares
         held by CW Ventures II, L.P. Mr. Hartman is a general partner of CW
         Partners II, L.P. and CW Partners III, L.P., the general partners,
         respectively, of these entities.  Mr. Hartman disclaims beneficial
         ownership of the shares held by these partnerships except to the
         extent of his general partnership interests therein.
(7)      Includes options to purchase 4,444 shares of Common Stock exercisable
         within 60 days of August 22, 1997.  
(8)      Includes options to purchase 10,090 shares of Common Stock 
         exercisable within 60 days of August 22, 1997.
   
(9)      Includes 170 shares of Common Stock and options to purchase 986
         shares of Common Stock within 60 days of August 22, 1997 held by Dr. 
         Usman's spouse in which Dr. Usman disclaims beneficial ownership.  
         The amount shown also includes options to purchase 14,403 shares of 
         Common Stock exercisable within 60 days of August 22, 1997.
    
   
(10)     Includes options to purchase 96,365 shares of Common Stock
         exercisable within 60 days of August 22, 1997.
    




                                      49
<PAGE>   51
                          DESCRIPTION OF CAPITAL STOCK

   
         The following description of the capital stock of the Company and
certain provisions of the Company's Certificate of Incorporation and Bylaws is
a summary and is qualified in its entirety by the provisions of the Certificate
of Incorporation and Bylaws.
    

         The Company's authorized capital stock  consists of 20,000,000 shares
of Common Stock, $0.01 par value per share, and 5,000,000 shares of preferred
stock, $0.01 par value per share.


COMMON STOCK

         The holders of Common Stock are entitled to one vote for each share
held of record on all matters submitted to a vote of the stockholders.  The
holders of Common Stock are not entitled to cumulative voting rights with
respect to the election of directors, and as a consequence, minority
stockholders will not be able to elect directors on the basis of their votes
alone.  Subject to preferences that may be applicable to any then outstanding
shares of preferred stock, holders of Common Stock are entitled to receive
ratably such dividends as may be declared by the Board of Directors out of
funds legally available therefor.  See "Dividend Policy." In the event of a
liquidation, dissolution or winding up of the Company, holders of the Common
Stock are entitled to share ratably in all assets remaining after payment of
liabilities and the liquidation preference of any then outstanding preferred
stock.  Holders of Common Stock have no preemptive rights and no right to
convert their Common Stock into any other securities.  There are no redemption
or sinking fund provisions applicable to the Common Stock.  All outstanding
shares of Common Stock are, and all shares of Common Stock to be outstanding
upon completion of this offering will be, fully paid and nonassessable.


WARRANTS

   
         As of August 22, 1997, there were warrants outstanding to purchase an
aggregate of 487,458 shares (subject to adjustment) of Common Stock as follows:
    

<TABLE>
<CAPTION>
    SHARES             EXERCISE PRICE                  EXPIRATION DATE
    ------             --------------                  ---------------
    <S>                    <C>                        <C>
     9,523                 $15.75                      October 1, 2000
     1,270                 $15.75                            N/A
    11,111                 $40.50                     December 28, 2001
    16,666                 $22.50                     September 1, 2003
     2,222                 $22.50                     December 29, 2005
    444,444                $22.50                      April 17, 2006
     2,222                 $22.50                      April 17, 2006
</TABLE>

   
         The warrants to purchase 1,270 shares of Common Stock are redeemable
at the option of the Company at any time upon 15 days' notice to the holders 
thereof, for an aggregate of $200.
    


PREFERRED STOCK

         The Board of Directors has the authority, without further action by
the stockholders, to issue up to 5,000,000 shares of preferred stock in one or
more series and to fix the rights, preferences, privileges and restrictions
thereof, including dividend rights, conversion rights, voting rights, terms of
redemption, liquidation preferences, sinking fund terms and the number of
shares constituting any series or the designation of such series, without any
further vote or action by stockholders.  The issuance of preferred stock could
adversely affect the voting power of holders of Common Stock and the likelihood
that such holders will receive dividend payments and payments upon liquidation
and could have the effect of delaying, deferring or preventing a change in
control of the Company.  The Company has no present plan to issue any shares of
preferred stock.




                                      50
<PAGE>   52
   
    


REGISTRATION RIGHTS

   
         As of August 22, 1997, the holders ("Holders") of aggregate of
approximately 3,955,500 shares of Common Stock (the "Registrable Shares") are
entitled to certain rights with respect to the registration of such shares for
offer and sale to the public under the Securities Act.  Under these provisions,
Holders of Registrable Shares may request that the Company file up to two
registration statements under the Securities Act with respect to such shares.
Upon receipt of such a request, the Company is required to notify all other
Holders and to use all reasonable efforts to effect such registration, subject
to certain conditions.  In addition, upon the request of Holders Registrable
Shares, the Company may be required to effect an unlimited number of
registrations on Form S-3. Further, whenever the Company proposes to register
any of its securities under the Securities Act for its own account or for the
account of other security holders, the Company is required to notify Holder's
of the proposed registration and include all Registrable Shares which such
Holder may request to be included in such registration, subject to certain
limitations.  Generally, the Company is required to bear all expenses (except
underwriting discounts, selling commissions and stock transfer taxes) of all
registrations.
    

   
         The Company has granted the holders of warrants that are exercisable
for, in the aggregate, 487,458 shares of Common Stock the same registration
rights for the shares issuable upon the exercise of the warrants as those
possessed by Holders of Registrable Shares.
    


DELAWARE ANTI-TAKEOVER LAW AND CERTAIN CHARTER PROVISIONS

         The Company is subject to the provisions of Section 203 of the
Delaware General Corporation Law (the "Delaware Law"), an anti-takeover law.
In general, the statute prohibits a publicly held Delaware corporation from
engaging in a "business combination" with an "interested stockholder" for a
period of three years after the date of the transaction in which the person
became an interested stockholder, unless the business combination is approved
in a prescribed manner.  For purposes of Section 203, a "business combination"
includes a merger, asset sale or other transaction resulting in a financial
benefit to the interested stockholder, and an "interested stockholder" is a
person who, together with affiliates and associates, owns (or within three
years prior, did own) 15% or more of the corporation's voting stock.

   
         The Company's Certificate of Incorporation and Bylaws also requires
that any action required or permitted to be taken by stockholders of the Company
must be effected at a duly called annual or special meeting of the stockholders
and may not be effected by a consent in writing.  In addition, special meetings
of the stockholders of the Company may be called only by the Board of Directors,
the Chairman of the Board or the Chief Executive Officer.  The Company's
Certificate of Incorporation also provides that the authorized number of
directors may be changed only by resolution of the Board of Directors.  These
provisions may have the effect of deterring hostile takeovers or delaying
changes in control or management of the Company.
    


TRANSFER AGENT AND REGISTRAR

         The transfer agent and registrar for the Company's Common Stock is
American Stock Transfer & Trust Company.




                                      51
<PAGE>   53
                              PLAN OF DISTRIBUTION

         The shares of Common Stock offered hereby are being offered by the
Company through Montgomery Securities (the "Placement Agent") on a best efforts
basis, which means that the Placement Agent is not obligated to purchase any
Common Stock and is required only to use all reasonable efforts to sell Common
Stock on behalf of the Company.  The Placement Agent will offer the Common
Stock principally to selected institutional investors, including current
institutional holders of the Company's Common Stock.  The Placement Agent has
been retained to act as the exclusive agent for the Company in connection with
the offering of the shares of Common Stock offered hereby.  The offering is
subject to the terms and conditions set forth in the Placement Agency Agreement
between the Company and the Placement Agent.

   
         The Placement Agent is not obligated to and does not intend to take (or
purchase) any of the shares of Common Stock for itself.  It is anticipated that
the Placement Agent will obtain indications of interest from potential investors
for the amount of the offering and that effectiveness of the Registration
Statement will not be requested and no investor funds will be accepted until
indications of interest have been received for the amount of the offering.
Confirmation and definitive prospectuses will be distributed to all investors at
the time of pricing, informing investors of the closing date, which will be
scheduled for three business days after pricing.  No investor funds will be
accepted prior to effectiveness of the Registration Statement. The Company may
sell less than all of the shares of Common Stock offered hereby.  There is no
required minimum number of shares that must be sold as a condition to completion
of the offering.  Upon closing, (i) the Company will deliver to each investor
the number of shares of Common Stock purchased by such investor in accordance
with instructions previously delivered by the Placement Agent on behalf of the
investors, (ii) each investor will deliver to the Company immediately available
funds in an amount equal to the aggregate purchase price of the shares of Common
Stock being sold to such investor and (iii) the Company will pay the Placement
Agents their fee. The offering will not continue after the closing.
    

         The Company has agreed to pay the Placement Agent a placement fee of
5.0% of the proceeds of the offering (2.5% of the proceeds from sales of shares
to investors identified by the Company) and to reimburse the Placement Agent
for its out-of-pocket expenses.  The Placement Agency Agreement provides that
the Company will indemnify the Placement Agent against certain liabilities,
including liabilities under the Securities Act, or will contribute to payments
that the Placement Agent may be required to make in respect thereof.

         Orders to purchase Common Stock will be effective only upon acceptance
by the Company, which reserves the right to reject any order in whole or in
part.

         The Company's officers and directors and certain other stockholders of
the Company, who collectively hold in the aggregate of approximately 2,392,825
shares of Common Stock, have agreed that for a period of 90 days after the date
of this Prospectus they will not, without the prior written consent of
Montgomery Securities, directly or indirectly sell, offer to sell or otherwise
dispose of any such shares of Common Stock or any right to acquire such shares.
The Company has agreed that for a period of 90 days after the date of this
Prospectus it will not, without the prior written consent of Montgomery
Securities, issue, offer, sell, grant options to purchase or otherwise dispose
of any of the Company's equity securities or any other securities convertible
into or exchangeable for the Common Stock or other equity security, except that
the Company may grant options under the Option Plans, or issue shares upon the
exercise of options or warrants previously granted.


                                 LEGAL MATTERS

         The validity of the shares of Common Stock offered hereby will be
passed upon for the Company by Rothgerber, Appel, Powers & Johnson LLP, Denver,
Colorado.  Pillsbury Madison & Sutro LLP, San Francisco, California, is acting
as counsel for the Placement Agent in connection with certain legal matters
relating to the shares of Common Stock offered hereby.




                                      52
<PAGE>   54
                                    EXPERTS

         The financial statements of Ribozyme Pharmaceuticals, Inc. at December
31, 1996 and 1995 and for the years then ended appearing in this Prospectus and
Registration Statement have been audited by Ernst & Young LLP, independent
auditors, as set forth in their report thereon appearing elsewhere herein, and
are included in reliance upon such report given upon the authority of such firm
as experts in accounting and auditing.

   
         Portions of this Prospectus entitled "Risk Factors--Uncertainty of
Protection of Patents and Proprietary Rights" and "Business--Patents and
Proprietary Technology" (6th-8th paragraphs thereof) have been reviewed by Lyon
& Lyon and are subject to an opinion to be rendered to the Placement Agent.  As
of the date of this Prospectus, attorneys at Lyon & Lyon beneficially hold
warrants to purchase 1,270 shares of Common Stock of the Company at an exercise
price of $15.75 per share.  The warrants have no expiration date.  In addition,
a partner of Lyon & Lyon holds options to purchase 20,000 shares of Common
Stock.  See "Description of Capital Stock--Warrants."
    




                                      53
<PAGE>   55
                        RIBOZYME PHARMACEUTICALS, INC.

                         INDEX TO FINANCIAL STATEMENTS


   
<TABLE>
<CAPTION>
                                                      Page
                                                      ----
<S>                                                   <C>
Report of Independent Auditors ...................    F-2

Balance Sheets ...................................    F-3

Statements of Operations .........................    F-4

Statements of Stockholders' Equity ...............    F-5

Statements of Cash Flows .........................    F-7

Notes to Financial Statements ....................    F-8
</TABLE>
    





                                      F-1

<PAGE>   56
              REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



The Stockholders and Board of Directors
Ribozyme Pharmaceuticals, Inc.

        We have audited the accompanying balance sheets of Ribozyme
Pharmaceuticals, Inc. as of December 31, 1996 and 1995, and the related
statements of operations, stockholders' equity, and cash flows for the years
then ended. These financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial
statements based on our audits.

        We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

        In our opinion, the financial statements referred to above present
fairly, in all material respects, the financial position of Ribozyme
Pharmaceuticals, Inc. at December 31, 1996 and 1995, and the results of its
operations and its cash flows for the years then ended in conformity with
generally accepted accounting principles.


                              /s/ERNST & YOUNG LLP

Denver, Colorado
February 6, 1997



                                      F-2

<PAGE>   57



                        RIBOZYME PHARMACEUTICALS, INC.

                                BALANCE SHEETS

                                    ASSETS

   
<TABLE>
<CAPTION>

                                                                           December 31,                  
                                                                  -----------------------------         June 30,
                                                                      1995              1996              1997
                                                                  ------------      ------------      ------------
                                                                                                       (Unaudited)
<S>                                                               <C>               <C>               <C>
Current assets:
   Cash and cash equivalents ................................     $  2,913,008      $ 13,050,678      $ 12,473,927
   Securities available-for-sale ............................        3,507,234         4,543,470           795,536
   Restricted cash ..........................................          530,034           242,733           150,129
   Accounts receivable ......................................           18,060            74,022                 -
   Notes receivable--related parties.........................           55,000           157,341            95,841
   Prepaid expenses and other ...............................          157,835           213,717           227,534
                                                                  ------------      ------------      ------------
Total current assets ........................................        7,181,171        18,281,961        13,742,967

Property, plant, and equipment:
   Machinery and equipment ..................................        3,294,157         3,652,794         4,464,492
   Leasehold improvements ...................................        3,353,886         3,539,437         3,539,436
   Office furniture and equipment ...........................          817,183           857,920           926,192
                                                                  ------------      ------------      ------------
                                                                     7,465,226         8,050,151         8,930,120
   Accumulated depreciation .................................       (2,947,831)       (3,639,779)       (4,452,824)
                                                                  ------------      ------------      ------------
                                                                     4,517,395         4,410,372         4,477,296

Restricted cash .............................................          679,896            52,669                 -
Notes receivable--related parties ...........................          217,330           122,398           164,932
Deferred patent costs, net of accumulated
   amortization (1996--$105,916; 1995--$65,169} .............        1,490,656         2,008,804         2,350,784
Other assets ................................................          136,106           415,366           428,706
                                                                  ------------      ------------      ------------
Total assets ................................................     $ 14,222,554      $ 25,291,570      $ 21,164,685
                                                                  ============      ============      ============

                                          LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable--trade ..................................     $    549,038      $    552,904      $    548,275
   Accrued liabilities ......................................           86,390           216,616            96,409
   Current portion of long-term debt ........................        1,129,854         1,572,189         1,366,717
   Current portion of capital lease obligations .............          768,014           152,093            53,815
                                                                  ------------      ------------      ------------
Total current liabilities ...................................        2,533,296         2,493,802         2,065,216

Long-term debt ..............................................        3,026,552         2,430,432         2,148,640
Capital lease obligations ...................................          152,093                 -                 -
Deferred gain ...............................................           32,645             5,515             2,543

Commitments

Stockholders' equity:
   Voting convertible preferred stock, $.01 par value; 
     5,000,000 shares authorized; 0, 0 and 2,231,960 shares 
     issued and outstanding at June 30, 1997, December 31,
     1996 and 1995, respectively ............................           22,321                 -                 -
   Common stock, $.01 par value; 20,000,000
     shares authorized; 7,193,819, 6,948,304 and
     982,501 shares issued and outstanding at
     June 30, 1997, December 31, 1996 and 1995, 
     respectively............................................            9,825            69,483            71,938
   Additional paid-in capital ...............................       40,725,061        67,873,284        70,590,744
   Accumulated deficit ......................................      (32,115,250)      (47,382,830)      (53,517,506)
   Unrealized loss on securities available-for-sale .........                -            (9,214)           (7,988)
   Deferred compensation ....................................         (163,989)         (188,902)         (188,902)
                                                                  ------------      ------------      ------------
Total stockholders' equity ..................................        8,477,968        20,361,821        16,948,286
                                                                  ------------      ------------      ------------
Total liabilities and stockholders' equity ..................     $ 14,222,554      $ 25,291,570      $ 21,164,685
                                                                  ============      ============      ============
</TABLE>
    


                            See accompanying notes


                                   F-3


<PAGE>   58


                        RIBOZYME PHARMACEUTICALS, INC.

                           STATEMENTS OF OPERATIONS



   
<TABLE>
<CAPTION>

                                                                                          Six months ended
                                                    Year ended December 31,                    June 30,
                                                ------------------------------      ----------------------------
                                                    1995               1996            1996              1997
                                                ------------      ------------      -----------      -----------
                                                                                             (Unaudited)
<S>                                             <C>               <C>               <C>              <C>
Revenues:
   Collaborative agreements ...............     $  1,178,248      $    759,122      $   759,122      $   894,000
   Grant and other income .................          101,976            13,981            3,380            2,971
   Interest income ........................          394,656           936,397          348,072          381,620
                                                ------------      ------------      -----------      -----------
Total revenues ............................        1,674,880         1,709,500        1,110,574        1,278,591

Expenses:
   Research and development ...............       12,204,232        14,188,836        7,665,998        6,154,454
   General and administrative .............        1,396,635         1,943,583        1,151,477          822,109
   Interest expense .......................          554,160           844,661          449,196          436,704
                                                ------------      ------------      -----------      -----------
Total expenses ............................       14,155,027        16,977,080        9,266,671        7,413,267
                                                ============      ============      ===========      ===========
Net loss ..................................     $(12,480,147)     $(15,267,580)     $(8,156,097)     $(6,134,676)
                                                ============      ============      ===========      ===========

Net loss per share ........................     $      (3.86)     $      (2.61)     $     (1.72)     $     (0.87)
                                                ============      ============      ===========      ===========

Shares used in computing net loss and 
   pro forma net loss per share ...........        3,230,341         5,844,987        4,730,750        7,038,128
                                                ============      ============      ===========      ===========
</TABLE>
    




                            See accompanying notes.


                                      F-4

<PAGE>   59


                        RIBOZYME PHARMACEUTICALS, INC.

                      STATEMENTS OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>

                                                                       SERIES A                  SERIES B             
                                             COMMON STOCK           PREFERRED STOCK           PREFERRED STOCK         
                                          SHARES     AMOUNT       SHARES       AMOUNT       SHARES       AMOUNT       
                                        ---------   ---------     -------    ---------      -------    ---------      
<S>                                     <C>         <C>           <C>        <C>            <C>        <C>            
Balance at December 31, 1994              981,177   $   9,812     666,664    $   6,667      761,897    $   7,619
  Issuance of common stock for cash         1,324          13          --           --           --           -- 
  Payment on warrants                          --          --          --           --           --           -- 
  Issuance of Series F preferred
    stock for cash, net of issuance
    costs of $5,909                            --          --          --           --           --           -- 
  Issuance of Series G preferred
    stock for cash, net of issuance
    costs of $103,139                          --          --          --           --           --           -- 
  Net loss                                     --          --          --           --           --           -- 
  Compensation for issuance of
    common stock and options                   --          --          --           --           --           -- 
  Unrealized gain on securities
    available-for-sale                         --          --          --           --           --           -- 
                                        ------------------------------------------------------------------------
Balance at December 31, 1995              982,501       9,825     666,664        6,667      761,897        7,619
  Conversion of preferred stock in
    connection with initial public
    offering                            2,231,960      22,321    (666,664)      (6,667)    (761,897)      (7,619)
  Issuance of common stock relating
    to certain antidilution rights
    in connection with initial public
    offering                              841,279       8,412          --           --           --           -- 
  Issuance of common stock for cash
    --initial public offering, net of
    issuance costs of $816,990          2,300,000      23,000          --           --           --           -- 
  Issuance of common stock for cash
    -- other                              510,829       5,108          --           --           --           -- 
  Payment on warrants                          --          --          --           --           --           -- 
  Issuance of common stock for
    employee bonus                         18,810         188          --           --           --           -- 
  Issuance of common stock under
    employee stock purchase plan           15,842         158          --           --           --           -- 
  Compensation for issuance of
    common stock and options                   --          --          --           --           --           -- 
  Issuance of common stock
    for services                            2,083          21          --           --           --           -- 
  Issuance of common stock relating
    to certain royalty agreements          45,000         450          --           --           --           -- 
  Net loss                                     --          --          --           --           --           -- 
  Unrealized loss on securities
    available-for-sale                         --          --          --           --           --           -- 
                                        ------------------------------------------------------------------------
Balance at December 31, 1996            6,948,304      69,483          --           --           --           -- 
  Issuance of common stock
    for cash (unaudited)                  229,853       2,298          --           --           --           -- 
  Issuance of common stock under
    employee stock purchase plan
    (unaudited)                            15,662         157          --           --           --           -- 
  Net loss (unaudited)                         --          --          --           --           --           -- 
  Unrealized loss on securities
    available-for-sale (unaudited)             --          --          --           --           --           -- 
                                        ------------------------------------------------------------------------
Balance at June 30, 1997 (unaudited)    7,193,819   $  71,938          --    $      --           --    $      -- 
                                        ========================================================================

<CAPTION>

                                                SERIES C                   SERIES D
                                             PREFERRED STOCK            PREFERRED STOCK
                                          SHARES       AMOUNT        SHARES      AMOUNT
                                         --------    ---------       ------    ---------
<S>                                      <C>         <C>             <C>       <C>
Balance at December 31, 1994              127,877    $   1,279       41,666    $     417
  Issuance of common stock for cash            --           --           --           --
  Payment on warrants                          --           --           --           --
  Issuance of Series F preferred
    stock for cash, net of issuance
    costs of $5,909                            --           --           --           --
  Issuance of Series G preferred
    stock for cash, net of issuance
    costs of $103,139                          --           --           --           --
  Net loss                                     --           --           --           --
  Compensation for issuance of
    common stock and options                   --           --           --           --
  Unrealized gain on securities
    available-for-sale                         --           --           --           --
                                         -----------------------------------------------
Balance at December 31, 1995              127,877        1,279       41,666          417
  Conversion of preferred stock in
    connection with initial public
    offering                             (127,877)      (1,279)     (41,666)        (417)
  Issuance of common stock relating
    to certain antidilution rights
    in connection with initial public
    offering                                   --           --           --           --
  Issuance of common stock for cash
    --initial public offering, net of
    issuance costs of $816,990                 --           --           --           --
  Issuance of common stock for cash
    -- other                                   --           --           --           --
  Payment on warrants                          --           --           --           --
  Issuance of common stock for
    employee bonus                             --           --           --           --
  Issuance of common stock under
    employee stock purchase plan               --           --           --           --
  Compensation for issuance of
    common stock and options                   --           --           --           --
  Issuance of common stock
    for services                               --           --           --           --
  Issuance of common stock relating
    to certain royalty agreements              --           --           --           --
  Net loss                                     --           --           --           --
  Unrealized loss on securities
    available-for-sale                         --           --           --           --
                                         -----------------------------------------------
Balance at December 31, 1996                   --           --           --           --
  Issuance of common stock
    for cash (unaudited)                       --           --           --           --
  Issuance of common stock under
    employee stock purchase plan
    (unaudited)                                --           --           --           --
  Net loss (unaudited)                         --           --           --           --
  Unrealized loss on securities
    available-for-sale (unaudited)             --           --           --           --
                                         -----------------------------------------------
Balance at June 30, 1997 (unaudited)           --    $      --           --    $      --
                                         ===============================================

</TABLE>

   
                            See accompanying notes.
    


                                      F-5

<PAGE>   60



                        RIBOZYME PHARMACEUTICALS, INC.

                STATEMENTS OF STOCKHOLDERS' EQUITY (CONTINUED)

<TABLE>
<CAPTION>

                                                 Series E                   Series F               Series G            Additional
                                              Preferred Stock            Preferred Stock        Preferred Stock         Paid-In
                                             Shares     Amount          Shares     Amount     Shares       Amount       Capital
                                            --------    -------        --------    ------    --------      -------    ------------
<S>                                         <C>         <C>            <C>          <C>      <C>           <C>        <C>
Balance at December 31, 1994                 107,095    $ 1,071              --     $  --          --      $    --    $ 27,926,345
  Issuance of common stock for cash               --         --              --        --          --           --           1,005
  Payment on warrants                             --         --              --        --          --           --           1,600
  Issuance of Series F preferred
    stock for cash, net of issuance
    costs of $5,909                               --         --          40,160       402          --           --       1,493,689
  Issuance of Series G preferred
    stock for cash, net of issuance
    costs of $103,139                             --         --              --        --     486,601        4,866      10,840,724
  Net loss                                        --         --              --        --          --           --              --
  Compensation for issuance of
    common stock and options                      --         --              --        --          --           --         461,698
  Unrealized gain on securities
    available-for-sale                            --         --              --        --          --           --              --
                                            --------------------------------------------------------------------------------------
Balance at December 31, 1995                 107,095      1,071          40,160       402     486,601        4,866      40,725,061
  Conversion of preferred stock in
    connection with initial
    public offering                         (107,095)    (1,071)        (40,160)     (402)   (486,601)      (4,866)             --
  Issuance of common stock relating
    to certain antidilution rights in
    connection with initial public
    offering                                      --         --              --        --          --           --          (8,412)
  Issuance of common stock for cash
    --initial public offering, net of
    issuance costs of $816,990                    --         --              --        --          --           --      20,550,010
  Issuance of common stock for cash
    -- other                                      --         --              --        --          --           --       3,762,048
  Payment on warrants                             --         --              --        --          --           --       1,800,000
  Issuance of common stock for
    employee bonus                                --         --              --        --          --           --         187,912
  Issuance of common stock under
    employee stock purchase plan                  --         --              --        --          --           --         131,172
  Compensation for issuance of
    common stock and options                      --         --              --        --          --           --         162,530
  Issuance of common stock
    for services                                  --         --              --        --          --           --          23,413
  Issuance of common stock relating
    to certain royalty agreements                 --         --              --        --          --           --         539,550
  Net loss                                        --         --              --        --          --           --              --
  Unrealized loss on securities
    available-for-sale                            --         --              --        --          --           --              --
                                            --------------------------------------------------------------------------------------
Balance at December 31, 1996                      --         --              --        --          --           --      67,873,284
  Issuance of common stock
    for cash (unaudited)                          --         --              --        --          --           --       2,529,673
  Issuance of common stock under
    employee stock purchase plan                  --         --              --        --          --           --         187,787
    (unaudited)
  Net loss (unaudited)                            --         --              --        --          --           --              --
  Unrealized loss on securities
    available-for-sale (unaudited)                --         --              --        --          --           --              --
                                            --------------------------------------------------------------------------------------
Balance at June 30, 1997
(unaudited)                                       --    $    --        $     --     $  --          --      $    --    $ 70,590,744
                                            ======================================================================================

<CAPTION>

                                                                Unrealized
                                               Accumulated       Loss on        Deferred
                                                  Deficit       Securities     Compensation       Total
                                               ------------    ------------    ------------    ----------
<S>                                            <C>             <C>             <C>             <C>
Balance at December 31, 1994                   $(19,635,103)   $    (70,755)   $         --    $  8,247,352
  Issuance of common stock for cash                      --              --              --           1,018
  Payment on warrants                                    --              --              --           1,600
  Issuance of Series F preferred
    stock for cash, net of issuance
    costs of $5,909                                      --              --              --       1,494,091
  Issuance of Series G preferred
    stock for cash, net of issuance
    costs of $103,139                                    --              --              --      10,845,590
  Net loss                                      (12,480,147)             --              --     (12,480,147)
  Compensation for issuance of
    common stock and options                             --              --        (163,989)        297,709
  Unrealized gain on securities
    available-for-sale                                   --          70,755              --          70,755
                                               ------------------------------------------------------------
Balance at December 31, 1995                    (32,115,250)             --        (163,989)      8,477,968
  Conversion of preferred stock in
    connection with initial public
    offering                                             --              --              --              --
  Issuance of common stock relating
    to certain antidilution rights in
    connection with initial public
    offering                                             --              --              --              --
  Issuance of common stock for cash
    --initial public offering, net of
    issuance costs of $816,990                           --              --              --      20,573,010
  Issuance of common stock for cash
    -- other                                             --              --              --       3,767,156
  Payment on warrants                                    --              --              --       1,800,000
  Issuance of common stock for
    employee bonus                                       --              --              --         188,100
  Issuance of common stock under
    employee stock purchase plan                         --              --              --         131,330
  Compensation for issuance of
    common stock and options                             --              --         (24,913)        137,617
  Issuance of common stock
    for services                                         --              --              --          23,434
  Issuance of common stock relating
    to certain royalty agreements                        --              --              --         540,000

  Net loss                                      (15,267,580)             --              --     (15,267,580)
  Unrealized loss on securities
    available-for-sale                                   --          (9,214)             --          (9,214)
                                               ------------------------------------------------------------
Balance at December 31, 1996                    (47,382,830)         (9,214)       (188,902)     20,361,821
  Issuance of common stock
    for cash (unaudited)                                 --              --              --       2,531,971
  Issuance of common stock under
    employee stock purchase plan (unaudited)             --              --              --         187,944

  Net loss (unaudited)                           (6,134,676)             --              --      (6,134,676)
  Unrealized loss on securities
    available-for-sale (unaudited)                       --           1,226              --           1,226
                                               ------------------------------------------------------------
Balance at June 30, 1997
(unaudited)                                    $(53,517,506)   $     (7,988)   $   (188,902)     16,948,286
                                               ============================================================
</TABLE>

   
                            See accompanying notes.
    

                                      F-6

<PAGE>   61



                        RIBOZYME PHARMACEUTICALS, INC.

                           STATEMENTS OF CASH FLOWS

   
<TABLE>
<CAPTION>

                                                                Year ended December 31,       Six months ended June 30,
                                                             ----------------------------    ----------------------------
                                                                1995              1996          1996             1997
                                                             ------------    ------------    ------------    ------------
OPERATING ACTIVITIES                                                                                 (Unaudited)
<S>                                                          <C>             <C>             <C>             <C>          
Net loss .................................................   $(12,480,147)   $(15,267,580)   $ (8,156,097)   $ (6,134,676)
Adjustments to reconcile net loss to net cash used
  by operating activities:
     Depreciation ........................................      1,245,024       1,648,435         832,345         813,045
     Amortization ........................................         66,300          40,747          22,555          26,737
     Write-off of deferred patent costs ..................        357,782               -               -               -
     Compensation related to common stock and
       options ...........................................        297,709         889,151         188,100          63,118
     Compensation for forgiveness of notes
       receivable--related parties .......................         50,000          92,466          92,466          92,466
     Loss on sale of securities available-for-sale .......          1,693          13,140          13,140               -
     Loss on sale of equipment ...........................         16,215               -               -               -
     Changes in operating assets and liabilities:
       Accounts receivable ...............................         62,954         (55,962)         12,669          74,022
       Prepaid expenses and other ........................       (110,764)        (55,882)       (130,159)        (13,816)
       Other assets ......................................       (111,258)        (29,260)        (22,685)        (17,802)
       Accounts payable--trade ...........................        183,799           3,866         (92,946)         (4,630)
       Accrued liabilities ...............................       (274,538)        130,226       1,739,798        (120,208)
       Deferred contract revenue .........................       (117,743)              -               -               -
       Deferred gain .....................................        (36,824)        (27,130)        (16,530)         (2,971)
                                                             ------------    ------------    ------------    ------------
Net cash used by operating activities ....................    (10,849,798)    (12,617,783)     (5,517,344)     (5,224,715)

INVESTING ACTIVITIES
Additions to property, plant, and equipment ..............     (3,342,954)     (1,541,412)     (1,044,510)       (879,970)
Additions to deferred patent costs .......................       (616,092)       (558,895)       (284,315)       (364,255)
Investment in corporate partner ..........................              -        (250,000)              -               -
Proceeds from sale of equipment ..........................          2,800               -               -               -
Net sales (purchases) of securities available-for-sale ...     (1,430,996)     (1,058,590)     (1,065,865)      3,749,153
Transfer of restricted cash ..............................       (709,930)        914,528         764,405         145,273
Loan repayments--related parties .........................              -          56,625               -           1,500
Loan advances--related parties ...........................        (55,000)       (156,500)       (155,417)        (75,000)
                                                             ------------    ------------    ------------    ------------
Net cash provided by (used in) investing activities ......     (6,152,172)     (2,594,244)     (1,785,702)      2,576,701

FINANCING ACTIVITIES
Net proceeds from sale of shares of preferred and
   common stock and of warrants ..........................     12,342,299      26,271,496      26,104,605       2,656,802
Payments under loan facilities ...........................       (455,752)     (1,316,027)       (596,348)       (741,721)
Borrowings under loan facilities .........................      3,341,283       1,162,242         411,238         254,460
Payments on capital lease obligations ....................     (1,039,974)       (768,014)       (440,512)        (98,278)
                                                             ------------    ------------    ------------    ------------
Net cash provided by financing activities ................     14,187,856      25,349,697      25,478,983       2,071,263
                                                             ------------    ------------    ------------    ------------

Net increase (decrease) in cash and cash equivalents .....     (2,814,114)     10,137,670      18,175,937        (576,751)
Cash and cash equivalents at beginning of year ...........      5,727,122       2,913,008       2,913,008      13,050,678
                                                             ------------    ------------    ------------    ------------
Cash and cash equivalents at end of year .................   $  2,913,008    $ 13,050,678    $ 21,088,945    $ 12,473,927
                                                             ============    ============    ============    ============
</TABLE>
    

                            See accompanying notes.



                                      F-7

<PAGE>   62



                        RIBOZYME PHARMACEUTICALS, INC.

                         NOTES TO FINANCIAL STATEMENTS

                               DECEMBER 31, 1996

            (INFORMATION AS OF JUNE 30, 1997 AND FOR THE SIX MONTH
              PERIODS ENDED JUNE 30, 1997 AND 1996 IS UNAUDITED)


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

   Description of Business

        Ribozyme Pharmaceuticals, Inc. ("RPI" or the "Company") was
incorporated on January 27, 1992 for the purpose of research, development and
commercialization of its ribozyme technology. To date, the Company has engaged
in the research and development of its ribozyme technology and has experienced
significant operating losses in each fiscal year since inception. The Company
has not generated any revenue from the commercialization of its ribozyme
technology and it expects to continue to incur significant operating losses
over at least the next several years.


   Basis of Presentation

        The Company incurred a net loss of $15,267,580 for the year ended
December 31, 1996 and has an accumulated deficit of $47,382,830 at December 31,
1996.

        Development of the Company's products will require a commitment of
substantial additional funds to conduct the costly and time-consuming research,
preclinical and clinical testing necessary to bring its proposed products to
market and to establish manufacturing and marketing capabilities. The Company's
future capital requirements will depend on many factors, including, among
others, the progress of the Company's research, development and drug discovery
efforts, the ability of the Company to establish collaborative arrangements for
clinical testing, progress with preclinical studies and clinical trials, the
time and costs involved in obtaining regulatory approvals, the costs involved
in preparing, filing, prosecuting, maintaining, defending and enforcing patent
claims, competing technological and market developments, changes in the
Company's existing research relationships, determination as to the commercial
potential of the Company's potential products, effective commercialization
activities and arrangements, and the cost and availability of third-party
financing for capital expenditures.


   Interim Financial Statements

        The financial statements as of June 30, 1997 and for the six month
periods ended June 30, 1997 and 1996 are unaudited, but include all adjustments
(consisting of normal recurring adjustments) which the Company considers
necessary for a fair statement of the financial position as of such date and
the operating results and cash flows for such periods. Results for interim
periods are not necessarily indicative of results of the entire year.


   Use of Estimates

        The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.



                                      F-8

<PAGE>   63



                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)


   Reverse Stock Split

        During 1996, the Company's Board of Directors and stockholders approved
a 1-for-9 reverse stock split of its outstanding common stock and preferred
stock, to be effected on April 11, 1996, and approved the amendment of the
Company's Restated Certificate of Incorporation to adjust the Company's
authorized capital stock to 20,000,000 shares of $.01 par value common stock,
and 5,000,000 shares of $.01 par value preferred stock. All references in the
accompanying financial statements to the number of common and preferred shares
and to per share amounts, stock options and warrants, have been retroactively
restated to reflect the reverse stock split.


   Net Loss Per Share

        Beginning January 1, 1996, net loss per share is computed using the
weighted average number of shares of common stock outstanding. Common
equivalent shares from stock options and warrants are excluded from the
computation as their effect is antidilutive. Prior to April 11, 1996, pursuant
to Securities and Exchange Commission Staff Accounting Bulletins and Staff
Policy, common and common equivalent shares issued during the 12-month period
prior to the proposed initial public offering at prices below the public
offering price are presumed to have been issued in contemplation of the public
offering, even if antidilutive, and have been included in the calculation as if
they were outstanding (using the treasury stock method and the initial public
offering price for common stock, stock options and warrants and the as
converted method for convertible preferred stock).

        In February 1997, the Financial Accounting Standards Board issued
Statement No. 128, Earnings per Share, which is required to be adopted on
December 31, 1997. At that time, the Company will be required to change the
method currently used to compute earnings per share and to restate all prior
periods. Under the new requirements for calculating primary earnings per share,
the dilutive effect of stock options will be excluded. The impact of Statement
No. 128 on these statements is not expected to be material.


   Cash and Cash Equivalents

        The Company considers all highly liquid investments purchased with a
maturity of three months or less to be cash equivalents. The Company's cash
equivalents are comprised of certificates of deposit, money market funds, and
investment securities with maturities of three months or less.


   Property, Plant, and Equipment

        Property, plant, and equipment is stated at cost. Depreciation is
computed by the straight-line method over the estimated useful lives of the
assets. Leasehold improvements and equipment subject to financing obligations
are amortized on a straight-line basis over the shorter of their estimated
useful lives or the lease term.


   Deferred Patent Costs

        The Company capitalizes legal costs directly incurred in pursuing
patent applications as deferred patent costs. When such application results in
an issued patent, the related costs are amortized over the remaining legal life
of the patents, using the straight-line method. On a quarterly basis, the
Company reviews its issued patents and pending patent applications, and if it
determines to abandon a patent application or that an issued patent no longer
has economic value, the unamortized balance in deferred patent costs relating
to that patent is immediately expensed.




                                      F-9

<PAGE>   64

                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



        It is possible the above estimates of future economic life of the
Company's commercialization revenues, the amount of anticipated future
commercialization revenues, or both, will be reduced significantly in the near
term due to alternative technologies developed by other biotechnology or
pharmaceutical companies. As a result, the carrying amount of deferred patent
costs may be reduced in the future.


   Long-Lived Assets

        In March 1995, the Financial Accounting Standards Board (FASB) issued
Statement of Financial Accounting Standards No. 121, Accounting for the
Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed Of
(SFAS 121), which requires impairment losses to be recorded on long-lived
assets used in operations when indications of impairment are present and the
undiscounted cash flows estimated to be generated by those assets are less than
the assets' carrying amount. SFAS 121 also addresses the accounting for
long-lived assets that are expected to be disposed of. The Company adopted the
provisions of SFAS 121 in the first quarter of 1996 with no material effect to
its financial statements.


   Revenue Recognition

        Revenues recognized under the Company's collaborative research
agreements and grants are recorded as earned ratably over the term of the
agreements. Payments received in advance under these agreements are recorded as
deferred revenue until earned.


   Research and Development Expenses

        Research and development costs are expensed as incurred.


   Certain Reclassifications

        Certain reclassifications have been made to the 1995 financial
statements to conform with the 1996 financial statement presentation.


2. SECURITIES AVAILABLE-FOR-SALE

        Management has determined that all marketable securities held by the
Company at June 30, 1997, December 31, 1996 and 1995 were available-for-sale.
Securities available-for-sale are carried at fair value, with unrealized gains
and losses reported as a separate component of stockholders' equity. The
amortized cost of debt securities in this category is adjusted for amortization
of premiums and accretion of discounts to maturity. Such amortization is
included in investment income. Realized gains and losses and declines in value
judged to be other-than-temporary on securities available-for-sale are included
in investment income. Interest and dividends on securities available-for-sale
are included in investment income. The cost of securities sold is based on the
specific identification method.



                                     F-10

<PAGE>   65



                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



The following is a summary of securities available-for-sale:

<TABLE>
<CAPTION>

                                                          Gross       Gross
                                           Amortized   Unrealized   Unrealized    Estimated
                                          Cost Basis      Gains       Losses      Fair Value
                                          ----------     ------      -------      ----------
<S>                                       <C>            <C>         <C>          <C>
At June 30, 1997:
   Backed by government securities
     (maturing in 1999) .............     $  803,524     $    -      $(7,988)     $  795,536
                                          ==========     ======      =======      ==========
At December 31, 1996:
   Backed by government securities
     (maturing in 1999 and 2025) ....     $4,552,684     $    -      $(9,214)     $4,543,470
                                          ==========     ======      =======      ==========
At December 31, 1995:
   U.S. corporate securities
     (maturing in 1996) .............     $3,507,234     $    -      $     -      $3,507,234
                                          ==========     ======      =======      ==========
</TABLE>


        The gross realized losses on sales of securities available-for-sale
totaled $13,140 and $1,693 in 1996 and 1995, respectively.


3. LONG-TERM DEBT

        Long-term debt as of December 31, 1995 and 1996 and June 30, 1997
consists of the following:

<TABLE>
<CAPTION>

                                                      DECEMBER 31,            JUNE 30,
                                               -------------------------     ----------
                                                  1995          1996           1997
                                               ----------     ----------     ----------
                                                                             (Unaudited)
<S>                                            <C>            <C>            <C>
Tenant improvement loan (I) ..............     $  693,077     $  304,951     $       --
Equipment loan (I) .......................      1,128,617        714,728         37,616
Tenant interest loan (II) ................        878,955        710,800        421,620
Tenant improvement and equipment 
  loan (II)...............................      1,455,757      1,240,191        810,678
Equipment loan (III) .....................             --      1,031,951        878,726
                                               ----------     ----------     ----------
                                               $4,156,406     $4,002,621     $2,148,640
                                               ==========     ==========     ==========
</TABLE>

I.      During 1994, the Company obtained a tenant improvement loan of
        $1,000,000 for leasehold improvements and an equipment loan to purchase
        up to $1,500,000 of equipment. The interest rate on borrowings under
        these loan facilities is the lender's prime rate plus 1.75% (10.00%
        (8.25% prime) at December 31, 1996). The agreement requires monthly
        principal and interest payments through August 1998.

II.     In April 1995, the Company obtained a loan of $1,000,000 collateralized
        by its tenant interest and certain existing leasehold improvements, and
        an additional loan to purchase up to $1,500,000 of leasehold
        improvements and equipment. The terms of the agreement call for fixed
        monthly principal and interest payments through October 1998, assuming
        the Company exercises a prepayment option. If the Company does not
        exercise the option, reduced fixed payments will continue through June
        2002.


                                     F-11

<PAGE>   66



                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)




III.    In December 1995, the Company negotiated an additional equipment credit
        facility of $2,000,000 with a financial institution. The facility
        commitment was terminated on June 30, 1997. The agreement requires
        monthly principal and interest payments through October 2000, at which
        time a final payment of $283,328 is due in full.

        Interest expense for the years ended December 31, 1996 and 1995
relating to the Company's long-term debt approximates the interest paid during
the respective periods.

        All assets acquired under the above loan facilities represent
collateral for the amounts outstanding. In addition, the Company is required to
maintain minimum cash balances in the form of certificates of deposit with a
financial institution, in the amount of $295,402 and $1,209,930 at December 31,
1996 and 1995, respectively. These amounts are presented as restricted cash in
the accompanying balance sheets.

        As of December 31, 1996, maturities of long-term debt are as follows:

<TABLE>
<CAPTION>

                                                AMOUNT
                                              ----------
                  <S>                         <C>
                  1997....................    $1,572,189
                  1998....................     2,087,993
                  1999....................       316,090
                  Thereafter..............        26,349
                                              ----------
                                              $4,002,621
                                              ==========
</TABLE>


4. LEASES AND COMMITMENTS

        During 1992 and 1993, the Company sold and simultaneously leased back
certain property and equipment in connection with various lease agreements. All
assets under such leases consisted of general laboratory and scientific
equipment, office equipment, furniture, fixtures, and certain leasehold
improvements. The interest rate on borrowings under these leases is
approximately 11%.

      Assets and the related accumulated amortization included in the above
leases are as follows as of December 31:

<TABLE>
<CAPTION>
                                                       1995              1996
                                                    ----------        ----------
<S>                                                 <C>               <C>       
Machinery and equipment ....................        $2,262,782        $  926,297
Office furniture and equipment .............           487,218           205,256
                                                    ----------        ----------
                                                     2,750,000         1,131,553
Less accumulated amortization ..............         2,045,584         1,019,680
                                                    ==========        ==========
                                                    $  704,416        $  111,873
                                                    ==========        ==========
</TABLE>

      The Company leases office space under a noncancelable operating lease
which was due to expire in June 1997; however, in March 1997 the Company
extended the term of the operating lease until June 2002. Total rent expense
was $265,732 and $259,901 in 1996 and 1995, respectively.



                                     F-12

<PAGE>   67



                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)


      The Company's lease commitments at December 31, 1996 are as follows:

<TABLE>
<CAPTION>
                                                CAPITAL
                                                 LEASE      OPERATING
                                              OBLIGATIONS     LEASE
                                              -----------   ---------
<S>                                           <C>           <C>      
           1997 ............................   $ 159,272    $ 290,940
           1998 ............................           -       49,965
           1999 ............................           -       13,560
           2000 ............................           -          930
                                               ---------    ---------
                                                 159,272    $ 355,395
                                                            =========
           Executory costs .................           -
           Amounts representing interest ...      (7,179)
                                               ---------
                                               $ 152,093
                                               =========
</TABLE>

5. STOCKHOLDERS' EQUITY

      In April 1996, the Company completed an initial public offering of its
common stock, whereby 2,300,000 shares of the Company's common stock were sold
at $10.00 per share, resulting in net proceeds of approximately $20.6 million.
As a result of the Company's initial public offering, all preferred shares
outstanding were converted into an aggregate of 2,231,960 shares of common
stock.

      Upon consummation of the initial public offering the Company sold 377,202
shares of common stock to Chiron Corporation ("Chiron") for $3,640,000.
Additionally, the Company received $1,800,000 from Chiron to complete the
purchase of warrants to purchase 444,444 shares of common stock, issued
concurrently with the IPO.

      In March 1996, the Company adopted an Employee Stock Purchase Plan (the
"Purchase Plan"), authorizing the issuance of 300,000 shares pursuant to
purchase rights granted to employees of the Company. The Purchase Plan provides
a means by which employees purchase common stock of the Company through payroll
deductions. The Purchase Plan is implemented by offerings of rights to eligible
employees. Generally, each offering is twenty-four months' duration with
purchases occurring on each October 31 and April 30 during each offering
(except that April 30, 1996 will not be a purchase date). Common stock is
purchased for accounts of employees participating in the Purchase Plan at a
price per share equal to the lower of (i) 85% of the fair market value of a
share of common stock on the date of commencement of participation in the
offering or (ii) 85% of the fair market value of a share of common stock on the
date of purchase. Generally all regular employees, including executive
officers, may participate in the Purchase Plan and may authorize payroll
deduction of up to 15% of their base compensation for the purchase of stock
under the plan. The Company's Board of Directors has the authority to terminate
the Purchase Plan at its discretion. Shares are deemed issued for accounting
purposes in the year the shares are purchased.

      Pursuant to an antidilution agreement (the "Antidilution Agreement") with
a founder of the Company, the Company agreed to issue additional shares to this
individual so that he will maintain a 5% interest in the fully diluted equity
of the Company until the occurrence of one of several events, including the
Company's initial public offering. Accordingly, effective April 11, 1996,
115,506 shares were issued related to the Antidilution Agreement which
represented the founder's 5% interest in the Company. No additional rights
under the Antidilution Agreement exist.



                                      F-13


<PAGE>   68



                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)


      Below is a summary of common stock reserved by the Company at December
31, 1996 for issuance upon the exercise of the various options, warrants and
the purchase plan.

<TABLE>
<CAPTION>
                                                       SHARES
                                                     ---------
<S>                                                  <C>      
                  Stock option plans .............   1,180,863
                  Employee stock purchase plan ...     284,158
                  Warrants at $15.75 per share ...      10,793
                  Warrants at $40.50 per share ...      11,111
                  Warrants at $22.50 per share ...     465,554
                                                     ---------
                                                     1,952,479
                                                     =========
</TABLE>

      The Company's ability to pay dividends is restricted by the terms of its
tenant improvement and equipment loan facility agreements.


6. STOCK OPTION PLANS

      The Company established a Non-Qualified Stock Option Plan and an
Incentive Stock Option Plan (collectively, the "Plans"), under which it is
authorized to grant stock options to eligible employees, consultants, and other
individuals, as defined in the Plans. Options to purchase the Company's common
stock are exercisable at a price as determined by the Board of Directors at the
time the option is granted, which shall not be less than 100% of the fair
market value (110% in the case of 10 percent shareholders) at the date of
grant. Vesting rights are determined by the Board of Directors at the time the
option is granted and generally the options become exercisable at twenty
percent at the end of each of years one through five. If not exercised, the
options expire after ten years. The Board of Directors has also granted certain
employees options vesting upon achievement of certain contingent milestone
events.

      The Company has elected to follow Accounting Principles Board Opinion No.
25, Accounting for Stock Issued to Employees (APB 25), and related
Interpretations in accounting for its employee stock options because, as
discussed below, the alternative fair value accounting provided for under FASB
Statement of Financial Accounting Standards No. 123, Accounting for Stock-Based
Compensation (SFAS 123), requires use of option valuation models that were not
developed for use in valuing employee stock options. Under APB 25, if the
exercise price of the Company's employee stock options equals the market price
of the underlying stock on the date of grant, no compensation expense is
recognized. During 1996 and 1995, the Company recorded $137,617 and $297,709,
respectively, of compensation relating to the grant of milestone-vested stock
options and the Antidilution Agreement.

      Pro forma information regarding net income and earnings per share is
required by SFAS 123, which also requires that the information be determined as
if the Company has accounted for its employee stock options granted subsequent
to December 31, 1994 under the fair value method of SFAS 123. The fair value
for these options was estimated at the date of grant using a Black-Scholes
option pricing model with the following weighted-average assumptions for 1996
and 1995, respectively: risk-free interest rates of 6.3% and 5.9%; a dividend
yield of 0%; volatility factors of the expected market price of the Company's
common stock of .566 and .566; and a weighted-average expected life of the
option of 6 years.

      The Black-Scholes option valuation model was developed for use in
estimating the fair value of traded options which have no vesting restrictions
and are fully transferable. In addition, option valuation models require the
input of highly subjective assumptions including the expected stock price
volatility. Because the Company's employee stock options have characteristics
significantly different from those of traded options, and because changes in
the subjective input assumptions can materially affect the fair value estimate,
in management's opinion, the existing models do not necessarily provide a
reliable single measure of the fair value of its employee stock options.



                                      F-14

<PAGE>   69
                             RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



      For purposes of pro forma disclosures, the estimated fair value of the
options is amortized to expense over the options' vesting period. The Company's
pro forma information follows (in thousands except for earnings per share
information):

<TABLE>
<CAPTION>
                                             1995               1996
                                         --------------    -------------- 
<S>                                      <C>               <C>            
          Pro forma net loss .........   $  (12,492,739)   $  (15,554,890)
          Pro forma loss per share ...            (3.87)            (2.66)
</TABLE>


      Changes in stock options for the years ended December 31, 1996 and 1995
were as follows:

<TABLE>
<CAPTION>
                                                                        EXERCISE
                                                      OPTIONS            PRICE
                                                   --------------    -------------
<S>                                                <C>               <C>   
          Outstanding at December 31, 1994 .....          353,195    $  .45-$ 4.50
          Options granted ......................           44,495    $ 2.70-$ 5.40
          Options exercised/canceled ...........          (29,852)   $  .45-$ 4.50
                                                   --------------    -------------
          Outstanding at December 31, 1995 .....          367,838    $  .45-$ 5.40
          Options granted ......................          508,652    $ 2.70-$19.00
          Options exercised/canceled ...........         (197,067)   $  .45-$ 5.40
                                                   --------------    -------------
          Outstanding at December 31, 1996 .....          679,423    $  .45-$19.00
                                                   ==============    =============
</TABLE>


      Stock options vest as follows:

<TABLE>
<CAPTION>
                                                               OPTIONS
                                                               -------
<S>                                                            <C>    
          Currently exercisable .....................          109,568
          1997 ......................................          132,893
          1998 ......................................          108,001
          1999 ......................................          105,288
          2000 ......................................           95,226
          2001 and thereafter .......................           89,382
          Contingent vesting ........................           39,065
                                                               -------
                 Total ..............................          679,423
                                                               =======
</TABLE>

      During the six month period ending June 30, 1997 the Company granted
246,100 stock options to its employees and Directors at exercise prices ranging
from $9.13 to $13.50.



                                     F-15

<PAGE>   70
                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



7. COLLABORATIVE AGREEMENTS

   Parke-Davis

      In April 1993, the Company entered into a research and development
collaboration agreement with the Parke-Davis division of the Warner-Lambert
Corporation ("Parke-Davis"), whereby Parke-Davis was to partially fund the
research and development costs incurred by the Company in developing and
commercializing ribozyme-based products for application to the treatment of
osteoarthritis and other diseases. Pursuant to the Parke-Davis agreement,
Parke-Davis purchased 100,100 shares of Series C preferred stock at a price of
$29.97 per share in 1993, 27,777 shares of Series C preferred stock at a price
of $36.00 per share in 1994, and 40,160 shares of Series F preferred stock at
$37.35 per share in 1995, for a total equity investment of $5,500,000. All
preferred shares were converted into 168,037 shares of common stock upon the
Company's initial public offering.

      Also pursuant to the collaboration agreement, through December 31, 1996,
Parke-Davis provided $1,700,000 research and development funding to the
Company. As of June 30, 1997, the collaboration agreement has been completed.


   Dow Elanco

      In September 1993, the Company entered into a research and development
study with DowElanco (the "Feasibility Study") to demonstrate the stable
integration and the effective use of ribozymes to alter corn composition. The
Feasibility Study has been completed and the parties entered into a long-term
license agreement for the development and commercialization of ribozymes to the
targets of interest. Pursuant to the terms of the Feasibility Study, DowElanco
agreed to reimburse the Company for all of its expenses related to the
Feasibility Study and, in 1994, purchased 41,666 shares of Series D preferred
stock at a price of $36.00 per share, for a total equity investment of
$1,500,000. All preferred shares were converted into 41,666 shares of common
stock upon completion of the Company's initial public offering, and were
returned and canceled in consideration of the license described above.


   Chiron

      In July 1994, the Company entered into a research and development
collaboration agreement with Chiron to research, develop and market products
directed towards five genetic targets, and all human clinical indications
associated with those targets. The Company and Chiron will share equally in the
costs and profits of any jointly developed products.



                                     F-16
<PAGE>   71
                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



      In addition, Chiron may, at its option, finance the Company's portion of
its Phase II and Phase III drug development costs for mutually approved
programs. The Company retains the option to reacquire its rights by reimbursing
Chiron for such development costs plus a predetermined risk premium. The term
of the research program is five years, with the terms of the agreement to be
extended if products are jointly developed. As part of this agreement, Chiron
committed to make a $10,000,000 equity investment in the Company. The
components of this investment are:

          In 1994, Chiron purchased 100,000 shares of the Company's common
      stock at a price of $3.60 per share, or $360,000; also in 1994 Chiron
      purchased 107,095 shares of Series E preferred stock at a price of $37.35
      per share, or $4,000,000. In 1996, the Company issued Chiron immediately
      upon the closing of the Company's initial public offering a warrant to
      purchase 444,444 shares of the Company's common stock which is
      exercisable at a price of $22.50 per share, for an aggregate purchase
      price of $4.50 per warrant share. In 1994, Chiron paid the Company $0.45
      per warrant share, or $200,000. The balance of the warrant purchase
      price, $1,800,000, or $4.05 per warrant share, was paid to the Company
      upon completion of its initial public offering. Further, Chiron purchased
      377,202 common shares with an aggregate value of $3,640,000 upon
      completion of the Company's initial public offering, at the initial
      public offering price less one-half of the underwriting discount. Chiron
      also has a designated Board member on the Company's Board of Directors.
      All preferred shares were converted into 142,222 shares of common stock
      upon completion of the Company's initial public offering.

      In May 1996, the Company entered into a collaboration with Chiron for the
use of ribozymes to characterize gene function. The collaboration gives Chiron
the right to develop and commercialize products that result from the
collaboration, and would entitle RPI to receive product development milestone
payments and royalties on sales of any such commercial products. Chiron and RPI
each pay a portion of the research and development expenses of the
collaboration, and the Company has provided Chiron $1,800,000 for research
funding related to the collaboration.


   Pharmacia Biotech AB

      In November 1995, the Company and Pharmacia Biotech AB entered into a
collaboration and license agreement for the improvement of production scale
synthesis of RNA and chimeric oligonucleotides. The goal of the collaboration
is to reduce the cost of manufacturing ribozymes and other oligonucleotide
products. Pharmacia Biotech AB will provide research funding, synthesis support
and instrumentation, while RPI will receive royalties on the sales of modified
RNA oligonucleotides and non-DNA primer support. As of December 31, 1996, the
Company received $512,500 in funding pursuant to the agreement and an
additional $219,000 in January 1997.


   Schering AG, Germany

      On April 9, 1997, the Company entered into a research collaboration with
Schering AG, Germany, ("Schering") focusing on the use of ribozymes for
therapeutic target validation, as well as the development of ribozymes as
therapeutic agents.



                                     F-17
<PAGE>   72

                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



   
      The collaboration will utilize the special selectivity of ribozymes to
validate new molecular therapeutic targets, and to discover new therapeutic
agents based on those targets. The Company will provide its expertise in
ribozyme design, synthesis and delivery, and Berlex Laboratories, Inc., a U.S.
subsidiary of Schering, will provide candidate targets, cell culture screens,
animal models and development and commercialization expertise to the
collaboration. The Company anticipates that hundreds of potential targets may be
examined over a five year period, and Berlex will have options to commercialize
products from any validated targets.
    

   
         Schering will make an equity investment of up to $5 million over the
next year and will separately provide loans of up to $2 million annually for
each of the next five years. The first equity investment was completed in May
1997, resulting in proceeds of $2.5 million to the Company in exchange for
212,766 shares of common stock. The loans, which are to carry an interest rate
of 8% per annum, are convertible into equity at the option of Schering under
certain circumstances. Principal and interest payments on the loans are deferred
until maturity of the loans which is in April 2004. In addition, Schering will
make research payments of $2 million a year for the next five years and the
Company may earn success fees upon product development milestones, and will
manufacture synthetic ribozyme products and receive royalties on sales of both
ribozyme and non-ribozyme products resulting from the collaboration. All such
payments are subject to certain restrictions, including receipt of certain third
party consents. The research collaboration may be terminated at Schering's
option at any time after April 9, 1998.
    


8. COMMITMENT AND CONTINGENCY

      During 1993, the Company entered into a sponsored research and license
agreement with an affiliate of the University of Colorado (the "Affiliate")
whereby, in order to maintain an annual right of first refusal on any ribozyme
invention by the Affiliate, the Company agreed to provide an unrestricted grant
for a total amount of $750,000. The agreement also provided for royalty
payments on future commercial product revenues by the Company to the Affiliate.
The Affiliate made an investment of approximately $41,000 for 46,188 shares of
the Company's common stock upon entering into the agreement.


      During 1996, the Company eliminated the royalty arrangement in exchange
for 45,000 shares of its common stock. The Company has recognized expense
related to the exchange of $540,000 during 1996. The Company's remaining
commitments under the above unrestricted grant are as follows:

<TABLE>
<S>                                                           <C>     
          1997 .................................              $262,500
          1998 .................................               112,500
                                                              --------
                                                              $375,000
                                                              ========
</TABLE>


      The Company is involved in legal proceedings which have arisen in the
ordinary course of business. In the opinion of management the outcome of these
legal proceedings will not have a material adverse impact on the Company's
financial position or operations.



                                     F-18
<PAGE>   73

                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



9.  RELATED PARTY TRANSACTIONS

      At December 31, 1996 and 1995, the Company has a total of $225,000 and
$155,000, respectively, of non-interest bearing loans due primarily from three
officers. Of this balance, $125,000 can be forgiven by the Company under
certain employment agreement provisions. The remaining loan balances are
payable to the Company under various terms not to exceed 5 years. The Company
forgave $85,000 and $50,000 of these loans during each of the years ending
December 31, 1996 and 1995, respectively.


10. INCOME TAXES

      The Company accounts for income taxes in accordance with Statement of
Financial Accounting Standard No. 109, Accounting for Income Taxes (SFAS 109).
Under the provisions of SFAS 109, a deferred tax liability or asset (net of a
valuation allowance) is provided in the financial statements by applying the
provisions of applicable tax laws to measure the deferred tax consequences of
temporary differences that will result in net taxable or deductible amounts in
future years as a result of events recognized in the financial statements in
the current or preceding years.

      At December 31, 1996, the Company has the following net operating loss
and tax credit carryforwards for income tax purposes:

<TABLE>
<CAPTION>
                                 NET        RESEARCH AND      STATE
                              OPERATING     DEVELOPMENT     INVESTMENT
      EXPIRATION DATE           LOSSES        CREDITS        CREDITS
      ---------------        -----------    -----------    -----------
<S>                          <C>            <C>            <C>        
          1999 ..........    $         -    $         -    $    14,000
          2000 ..........              -              -         11,000
          2001 ..........              -              -          6,000
          2007 ..........      3,506,000        101,000              -
          2008 ..........      7,363,000        185,000              -
          2009 ..........      9,239,000        316,000              -
          2010 ..........     11,923,000        139,000
          2011 ..........     15,015,000        181,000              -
                             -----------    -----------    -----------
               Total ....    $47,046,000    $   922,000    $    31,000
                             ===========    ===========    ===========
</TABLE>



                                     F-19
<PAGE>   74

                        RIBOZYME PHARMACEUTICALS, INC.

                   NOTES TO FINANCIAL STATEMENTS-(CONTINUED)



      The Tax Reform Act of 1986 contains provisions that limit the utilization
of net operating loss and tax credit carryforwards if there has been a "change
of ownership" as described in Section 382 of the Internal Revenue Code. Such a
change of ownership may limit the Company's utilization of its net operating
loss and tax credit carryforwards, and could have been triggered by the
Company's initial public offering or by subsequent sales of securities by the
Company or its shareholders.

      The components of the Company's deferred tax assets and liabilities as of
December 31, 1996 and 1995 are as follows:

<TABLE>
<CAPTION>
                                                     1995              1996
                                                 ------------      ------------
<S>                                              <C>               <C>         
Deferred tax assets:
   Net operating loss carryforwards ........     $ 11,979,000      $ 17,548,000
   Research and development and state
     investment credit carryforwards .......          893,000           953,000
   Depreciation ............................          352,000           619,000
   Other ...................................           26,000             6,000
                                                 ------------      ------------
                                                   13,250,000        19,126,000
   Valuation allowance .....................      (12,686,000)      (18,348,000)
                                                 ------------      ------------
   Net deferred tax assets .................          564,000           778,000

Deferred tax liabilities:
   Deferred patent costs ...................     $    555,000      $    749,000
   Other ...................................            9,000            29,000
                                                 ------------      ------------
Total deferred tax liabilities .............          564,000           778,000
                                                 ------------      ------------
                                                 $          -      $          -
                                                 ============      ============ 
</TABLE>



                                     F-20
<PAGE>   75
===========================================================
 
     No dealer, sales representative or any other 
person has been authorized to give any information 
or to make any representations in connection with 
this offering other than those contained in this 
Prospectus, and, if given or made, such information 
or representations must not be relied upon as having 
been authorized by the Company or the Placement Agent. 
This Prospectus does not constitute an offer to sell 
or a solicitation of an offer to buy any securities 
other than the shares of Common Stock to which it 
relates or an offer to, or a solicitation of, any person 
in any jurisdiction where such an offer or solicitation 
would be unlawful. Neither the delivery of this Prospectus 
nor any sale made hereunder shall, under any circumstances, 
create any implication that there has been no change in the 
affairs of the Company since the date hereof or that the 
information contained herein is correct as of any time 
subsequent to the date hereof.
 
              -------------------
               TABLE OF CONTENTS
              -------------------
 
   
<TABLE>
<CAPTION>
                                        Page
                                        ----
<S>                                     <C>
Available Information.................     2
Prospectus Summary....................     3
Risk Factors..........................     6
Use of Proceeds.......................    14
Dividend Policy.......................    15
Price Range of Common Stock...........    15
Capitalization........................    16
Dilution..............................    17
Selected Financial Data...............    18
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations.......................    19
Business..............................    22
Management............................    36
Certain Transactions..................    43
Principal Stockholders................    45
Description of Capital Stock..........    47
Plan of Distribution..................    49
Legal Matters.........................    50
Experts...............................    50
Index to Financial Statements.........   F-1
</TABLE>
    
 
===========================================================
 

===========================================================

 
                   1,400,000 SHARES


 
                      [RPI LOGO]


 
                     COMMON STOCK



                   ----------------
                      PROSPECTUS
                   ----------------



                 MONTGOMERY SECURITIES
 


                           , 1997


 
===========================================================
<PAGE>   76

                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 24.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         Under Section 145 of the Delaware General Corporation Law, the
Registrant has broad powers to indemnify its directors and officers against
liabilities they may incur in such capacities, including liabilities under the
Securities Act of 1933, as amended (the "Securities Act").

         The Registrant's Certificate of Incorporation provides for the
elimination of liability for monetary damages for breach of the directors'
fiduciary duty of care to the Registrant and its stockholders. These provisions
do not eliminate the directors' duty of care and, in appropriate circumstances,
equitable remedies such an injunctive or other forms of non-monetary relief
will remain available under Delaware law. In addition, each director will
continue to be subject to liability for breach of the director's duty of
loyalty to the Registrant, for acts or omissions not in good faith or involving
intentional misconduct, for knowing violations of law, for any transaction from
which the director derived an improper personal benefit, and for payment of
dividends or approval of stock repurchases or redemption's that are unlawful
under Delaware law. The provision does not affect a director's responsibilities
under any other laws, such as the federal securities laws or state or federal
environmental laws.

         The Placement Agency Agreement filed as Exhibit 1.1 to this
Registration Statement provides for indemnification by the Placement Agent of
the Registrant and its officers and directors for certain liabilities arising
under the Securities Act or otherwise.

ITEM 25.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following table sets forth all expenses, other than the placement
fees, payable by the Registration in connection with the sale of the Common
Stock being registered. All the amounts shown are estimates except for the
registration fee and the NASD filing fee and the Nasdaq National Market
Listing.

<TABLE>
<S>                                                           <C>     
          Registration fee ..............................     $  3,500
          NASD filing fee ...............................        1,655
          Nasdaq listing fee ............................       17,500
          Blue sky qualification fee and expenses .......        5,000
          Printing and engraving expenses ...............      100,000
          Legal fees and expenses .......................      150,000
          Accounting fees and expenses ..................       50,000
          Transfer agent and registrar fees .............        5,000
          Miscellaneous .................................       17,345
                                                              --------
                   Total ................................      350,000
                                                              ========
</TABLE>



                                     II-1
<PAGE>   77

ITEM 26.  RECENT SALES OF UNREGISTERED SECURITIES.

         Since September 1, 1994, the Registrant has issued and/or sold
unregistered securities as set forth below.

(1)      During the period, stock options to purchase shares of Common Stock
         were exercised as follows:

   
<TABLE>
<CAPTION>
                      Date                      Shares      Price/Share
                      ----                      ------      -----------
<S>                                             <C>         <C> 
                  September 1994                  66         $  0.90
                  September 1994                 866            0.45
                  September 1994                 166            1.80
                  September 1994                 444            0.45
                  October 1994                   333            0.90
                  October 1994                   888            0.45
                  April 1995                      86            1.80
                  April 1995                      33            1.80
                  August 1995                    315            1.26
                  December 1995                  888            0.45
                  January 1996                 1,666            4.50
                  January 1996                76,112            0.45
                  May 1996                       233            0.45
                  May 1996                        22            1.80
                  May 1996                        88            3.60
                  May 1996                        47            5.40
                  June 1996                      200            0.45
                  June 1996                       17            1.80
                  June 1996                       75            3.60
                  June 1996                       33            5.40
                  June 1996                   24,444            0.90
</TABLE>
    


(2)      In December 1994, the Registrant sold a warrant to purchase 11,111
         shares of Common Stock at an exercise price of $40.50 per share for
         cash at a price of $100 and in partial consideration for the
         modification of certain license terms to an Accredited Investor.

(3)      In March 1995, the Registrant sold a warrant to purchase 16,666
         shares of Common Stock at an exercise price of $22.50 per share for
         cash at a price of $1,500 to an Accredited Investor.

(4)      In April 1995, the Registrant sold 40,162 shares of Series F
         preferred stock for cash at a price of $37.35 per share to an
         Accredited Investor.

(5)      In December 1994, the Registrant sold (i) 100,000 shares of Common
         Stock for cash at a price of $3.60 per share and (ii) 107,095 shares of
         Series E preferred stock for cash at a price of $37.35 per share to an
         Accredited Investor.

(6)      In August 1995, the Registrant sold 442,165 shares of Series G
         preferred stock for cash at a price of $22.50 per share to 22
         Accredited Investors.

(7)      In December 1995, the Registrant sold 44,444 shares of Series G
         preferred stock for cash at a price of $22.50 per share to an
         Accredited Investor.

(8)      In December 1995, the Registrant issued a warrant to purchase 2,222
         shares of Common Stock at an exercise price of $22.50 per share to an
         Accredited Investor as partial consideration for a lease.



                                     II-2
<PAGE>   78

(9)      In April 1996, the Registrant issued 18,810 shares of Common Stock to
         the President of the Registrant pursuant to his employment agreement.

(10)     In April 1996, the Registrant sold for cash 377,202 shares of Common
         Stock at a price of $9.65 per share and warrants to purchase 444,444 at
         a price of $4.50 per warrant to an Accredited Investor.

(11)     In September 1996, the Registrant issued 22,500 shares of Common Stock
         to an Accredited Investor in consideration for modification of
         certain license terms.

(12)     In November 1996, the Registrant issued 22,500 shares of Common Stock
         to an Accredited Investor in consideration for modification of
         certain license terms.

(13)     In December 1996, the Registrant issued 2,083 shares of Common Stock
         to a consultant for partial consideration for services rendered.

(14)     In May 1997, the Registrant sold 212,766 shares of Common Stock for
         cash at a price of $11.75 per share to an Accredited Investor.

         The sales and issuances of securities in the transactions described in
paragraph (1) above were deemed to be exempt from registration under the
Securities Act by virtue of Rule 701 promulgated thereunder in that they were
offered and sold either pursuant to written compensatory benefit plans or
pursuant to a written contract relating to compensation, as provided by Rule
701.

         The sales and issuances of securities in the transactions described in
paragraphs (2) through (14) above were deemed to be exempt from registration
under the Securities Act by virtue of Section 4(2) and/or Rule 506 promulgated
under the Securities Act. The purchasers in each case represented their
intention to acquire the securities for investment only and not with a view to
the distribution thereof. Appropriate legends are affixed to the stock
certificates issued in such transactions. Similar legends were imposed in
connection with any subsequent sales of any such securities. All recipients
either received adequate information about the Registrant or had access,
through employment or other relationships to such information.



                                     II-3
<PAGE>   79

ITEM 27.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

EXHIBIT
NUMBER      DESCRIPTION OF DOCUMENT

   
1.1*        Form of Placement Agency Agreement.
    

   
3.1         Amended and Restated Certificate of Incorporation dated 
            April 17, 1996 and corrected September 15, 1997.
    

3.2(1)      By-laws of the Company, as amended.

4.1(1)      Reference is made to Exhibits 3.1 and 3.2.

4.2(1)      Specimen Stock Certificate.

   
5.1         Opinion of Rothgerber, Appel, Powers and Johnson LLP
    

10.1(1)     Form of Indemnity Agreement entered into between the Company 
            and its directors and officers, with related schedule.

10.2(1)     Company's Incentive Stock Option Plan(the "ISO Plan"), 
            including form of Incentive Stock Option Agreement under the
            ISO Plan.

10.3(1)     Company's Non-Qualified Stock Option Plan(the "NQSO Plan"), 
            including form of Non-Qualified Stock Option under the NQSO
            Plan.

10.4(1)     Company's 1996 Stock Option Plan(the "Option Plan"), 
            including forms of Incentive Stock Option and Nonstatutory
            Stock Option under the Option Plan.

10.5(1)     Company's 1996 Employee Stock Purchase Plan.

   
10.6*       Employment Agreement, dated January 1, 1997 between the 
            Company and Ralph Christoffersen.
    

10.7(1)     Incentive Stock Option Agreement between the Company and
            Ralph E. Christoffersen, dated as of December 23, 1992.

10.8(1)     Incentive Stock Option Agreement between the Company and
            Ralph E. Christoffersen, dated as of September 23, 1994.

10.9(1)     Warrant Purchase Agreement, dated as of March 15, 1995
            between the Company and Hambrecht & Quist Guaranty Finance,
            L.P.

10.10(1)    Warrant to Purchase Common Stock, dated as of March 15, 1995
            issued to Hambrecht & Quist Guaranty Finance, L.P.

10.11(1)    Warrant to Purchase Common Stock, dated as of February 22,
            1993 issued to LINC Scientific Leasing.

10.12(1)    Warrant to Purchase Common Stock, dated as of July 30, 1993
            issued to Douglas E. Olson.

10.13(1)    Warrant to Purchase Common Stock, dated as of July 30, 1993
            issued to Richard J. Warburg and Ruth P. Warburg.



                                     II-4
<PAGE>   80

10.14(1)    Warrant to Purchase Common Stock, dated as of December 28,
            1994 issued to Competitive Technologies, Inc.

10.15(1)    Warrant to Purchase Common Stock, dated as of December 29,
            1995 issued to Silicon Valley Bank.

10.16(1)    Warrant to Purchase Common Stock, dated July 26, 1996 issued
            to Silicon Valley Bank.

10.17(1)    Warrant to Purchase Common Stock, dated April 17, 1996,
            issued to Chiron Corporation.

10.18(1)    Collaborative Research, Development and Commercialization
            Agreement, dated July 15, 1994 between the Company and Chiron
            Corporation.

10.19(1)    Research Collaboration and Licensing Agreement, dated as of
            November 1, 1995 between the Company and Pharmacia Biotech,
            AB

10.20(1)    Research and Development Collaboration Agreement, dated as of
            April 19, 1993 between the Company and Parke-Davis Division
            of Warner-Lambert Company.

10.21(1)    First Amendment to the Research and Development Collaboration
            Agreement, dated April 19, 1993, dated as of April 17, 1995
            between the Company and Parke-Davis Division of
            Warner-Lambert Company.

10.22(1)    Second Amendment to the Research and Development
            Collaboration Agreement, dated April 19, 1993, dated as of
            February 8, 1996 between the Company and Parke-Davis Division
            of Warner-Lambert Company.

10.23(1)    Financing Agreement, dated March 16, 1995 among Wilderness
            Place Holdings L.L.C., Hambrecht & Quist Guaranty Finance,
            L.P. and the Company.

10.24(1)    Negotiable Promissory Note, dated October 7, 1992 between the
            Company and Ralph Christoffersen and Addendum dated June 25,
            1993.

10.25(1)    Employment Agreement, dated January 8, 1996 between the
            Company and Lawrence E. Bullock.

10.26(1)    Promissory Note, dated February 8, 1996 between the Company
            and Lawrence E. Bullock.

10.27(1)    Lease for Real Property, dated May 20, 1992 between Aero-Tech
            Investments and the Company.

10.28(1)    Non-Disturbance and Attornment Agreement, dated March 31,
            1995 among General American Life Insurance Company, Aero-Tech
            Investments, Wilderness Place Holdings L.L.C. and the
            Company.

10.29(1)    Master Lease Agreement, dated September 2, 1992 between the
            Company and LINC Scientific Leasing.

10.30(1)    Loan and Security Agreement, dated February 28, 1994 between
            the Company and Silicon Valley Bank.

10.31(1)    Loan Modification Agreement, dated December 21, 1994 between
            the Company and Silicon Valley Bank.

10.32(1)    Loan and Security Agreement, dated December 29, 1995 between
            the Company and Silicon Valley Bank and MMC/GATX Partnership
            No. 1.



                                     II-5
<PAGE>   81

10.33(1)    Warrant to Purchase Common Stock, dated as of December 29,
            1995 issued to MMC/GATX Partnership No. 1

10.34(1)    Agreement, dated February 29, 1996 between the Company and
            Chiron Corporation relating to research and development
            funding.

10.35(3)    Amendments to original Employment Agreements between the
            Company and Ralph E. Christoffersen, Lawrence E. Bullock and
            Nassim Usman, pursuant to letters dated November 14, 1996,
            November 22, 1996 and December 15, 1996.

10.36(3)    Promissory Note, dated June 4, 1996 between the Company and
            Nassim Usman.

10.37(3)    Amendment to Lease for Real Property, dated March 13, 1997
            between Aero-Tech Investments and the Company.

10.38(2)    Employment Agreement, dated May 2, 1996 between the Company
            and Nassim Usman.

10.39(2)    Collaboration Agreement Regarding Use of Ribozymes to
            Determine Gene Function, dated May 13, 1996 between the
            Company and Chiron Corporation.

10.40(3)!   Amended and Restated License Agreement, dated November 20,
            1996, between the Company, University Research Corporation,
            University of Colorado and United States Biochemical
            Corporation.

10.41(3)!   Amended and Restated Sublicense Agreement, dated November 20,
            1996, between the Company and United States Biochemical
            Corporation.

10.42(3)!   Amended and Restated License Agreement, dated November 20,
            1996, between the Company and Competitive Technologies,
            Incorporated.

10.43(1)    Memorandum of Understanding, dated March 1, 1996 between the
            Company and DowElanco.

10.44(3)!   Stock Subscription Agreement, dated September 1996, between
            the Company and University of Research Corporation.

10.45(3)!   Stock Subscription Agreement, dated November 20, 1996,
            between the Company and United States Biochemical
            Corporation.

10.46(3)!   Assignment of License and Restated License Agreement, dated
            November 20, 1996, among the Company, United States
            Biochemical Corporation and Competitive Technologies.

   
10.47       No exhibit filed.
    

   
10.48       No exhibit filed.
    

10.49(3)!   License Agreement dated February 14, 1997, between the
            Company and IntelliGene, Ltd.

10.50(1)    Subscription Agreement, dated as of April 17, 1995, between
            the Company and Parke- Davis Division of Warner-Lambert
            Company.

10.51(1)    Stock Purchase Agreement, dated as of June 28, 1995, among
            the Company and certain investors.

10.52(1)    Agreement dated March 1, 1996, between the Company and
            DowElanco Corporation relating to the conversion of preferred
            stock.



                                     II-6
<PAGE>   82

10.53(1)    Stock Subscription Agreement dated as of October 30, 1995,
            between the Company and Gewestelijke Investeringsmaatschappij
            voor Vlaanderon n.v.

10.54(4)!   Research, License, Supply and Royalty Agreement between
            Schering Aktiengesellschaft and the Company, dated April 9,
            1997.

10.55(4)!   Purchase Agreement dated as of April 9, 1997 among the
            Company, Schering Berlin Venture Corporation and Schering
            Aktiengesellschaft.

   
10.56*      Employment agreement dated February 27, 1997 between the
            Company and Alene Holzman.
    

   
10.57*      Employment agreement dated July 5, 1997 between the Company
            and Thomas Rossing.
    

11.1(3)(5)  Statement regarding calculation of net loss per share.

23.1        Consent of Ernst & Young LLP, Independent Auditors.

23.2        Consent of Rothgerber, Appel, Powers & Johnson LLP, refer to
            Exhibit 5.1.

   
23.3*       Consent of Lyon & Lyon.
    

   
24.1*       Power of Attorney.
    


   
*        Previously filed.
    

!        The Company has applied for confidential treatment with respect to
         portions of these Exhibits.

(1)      Incorporated by reference to the Company's Form SB-2 Registration
         Statement, File No. 333-1908-D.

(2)      Incorporated by reference to the Company's Form 10-QSB for the quarter
         ended June 30, 1996.

(3)      Incorporated by reference to the Company's Form 10-KSB for the year
         ended December 31, 1996.

(4)      Incorporated by reference to the Company's Form 8-K dated June 12,
         1997.

(5)      Incorporated by reference to the Company's Form 10-QSB for the quarter
         ended June 30, 1997.



                                     II-7
<PAGE>   83

ITEM 28.  UNDERTAKINGS.


          Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers, and controlling
persons of the Registrant pursuant to the provisions described in Item 14 or
otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public
policy as expressed in the Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer,
or controlling person of the Registrant in the successful defense of any
action, suit, or proceeding) is asserted by such director, officer, or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Securities Act and will be governed by the final adjudication
of such issue.

          The undersigned Registrant undertakes that (1) for purposes of
determining any liability under the Securities Act of 1933, the information
omitted from the form of prospectus as filed as part of the registration
statement in reliance upon Rule 430A and contained in the form of prospectus
filed by the Registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the
Securities Act shall be deemed to be part of the registration statement as of
the time it was declared effective, and (2) for the purpose of determining any
liability under the Securities Act, each post-effective amendment that contains
a form of prospectus shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bonafide offering thereof.



                                     II-8
<PAGE>   84

                                  SIGNATURES

   
          In accordance with the requirements of the Securities Act of 1933,
the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form SB-2 and authorized this
Amendment to Registration Statement to be signed on its behalf by the 
undersigned in the City of Boulder, State of Colorado, on the 15th day of 
September, 1997.
    


                                       RIBOZYME PHARMACEUTICALS, INC.



                                       By: /s/ Ralph E. Christoffersen
                                           -----------------------------------
                                       Ralph E. Christoffersen, Ph.D.
                                       Chief Executive Officer and President



                                     II-9
<PAGE>   85

   
    

   
         Pursuant to the requirements of the Securities Act of 1933, this
Amendment to Registration Statement has been signed below by the following 
persons in the capacities and on the dates indicated.
    

   
<TABLE>
<CAPTION>
         Signature                         Title                             Date
         ---------                         -----                             ----
<S>                               <C>                                 <C> 
/s/ Ralph E. Christoffersen       Chief Executive Officer and         September  15, 1997
- ---------------------------         President (Principal              -------------------
Ralph E. Christoffersen             Executive Officer)


/s/ Lawrence E. Bullock           Vice President, Administration      September  15, 1997
- ---------------------------         and Finance, Chief                -------------------
Lawrence E. Bullock                 Financial Officer and      
                                    Secretary (Principal       
                                    Financial and Accounting   
                                    Officer)                   


            *                     Chairman of the Board of            September  15, 1997
- ---------------------------       Directors                           -------------------
David T. Morgenthaler             


                                  Director                            
- ---------------------------                                           -------------------
Jeremy C. Cook


            *                     Director                            September  15, 1997
- ---------------------------                                           -------------------
Anthony B. Evnin, Ph.D.


            *                     Director                            September  15, 1997
- ---------------------------                                           -------------------
Charles M. Hartman


            *                     Director                            September  15, 1997
- ---------------------------                                           -------------------
Anders Wiklund


*By /s/ Ralph E. Christoffersen 
   ----------------------------
   Ralph E. Christoffersen
   Attorney-in-fact
</TABLE>
    

                                     II-10
<PAGE>   86
                                EXHIBIT INDEX

   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER      DESCRIPTION OF DOCUMENT
- -------     -----------------------
<S>         <C>                                                  
1.1*        Form of Placement Agency Agreement.

3.1         Amended and Restated Certificate of Incorporation dated 
            April 17, 1996 and corrected September 15, 1997.

3.2(1)      By-laws of the Company, as amended.

4.1(1)      Reference is made to Exhibits 3.1 and 3.2.

4.2(1)      Specimen Stock Certificate.

5.1         Opinion of Rothgerber, Appel, Powers and Johnson LLP

10.1(1)     Form of Indemnity Agreement entered into between the Company 
            and its directors and officers, with related schedule.

10.2(1)     Company's Incentive Stock Option Plan(the "ISO Plan"), 
            including form of Incentive Stock Option Agreement under the
            ISO Plan.

10.3(1)     Company's Non-Qualified Stock Option Plan(the "NQSO Plan"), 
            including form of Non-Qualified Stock Option under the NQSO
            Plan.

10.4(1)     Company's 1996 Stock Option Plan(the "Option Plan"), 
            including forms of Incentive Stock Option and Nonstatutory
            Stock Option under the Option Plan.

10.5(1)     Company's 1996 Employee Stock Purchase Plan.

10.6*       Employment Agreement, dated January 1, 1997 between the 
            Company and Ralph Christoffersen.

10.7(1)     Incentive Stock Option Agreement between the Company and
            Ralph E. Christoffersen, dated as of December 23, 1992.

10.8(1)     Incentive Stock Option Agreement between the Company and
            Ralph E. Christoffersen, dated as of September 23, 1994.

10.9(1)     Warrant Purchase Agreement, dated as of March 15, 1995
            between the Company and Hambrecht & Quist Guaranty Finance,
            L.P.

10.10(1)    Warrant to Purchase Common Stock, dated as of March 15, 1995
            issued to Hambrecht & Quist Guaranty Finance, L.P.

10.11(1)    Warrant to Purchase Common Stock, dated as of February 22,
            1993 issued to LINC Scientific Leasing.

10.12(1)    Warrant to Purchase Common Stock, dated as of July 30, 1993
            issued to Douglas E. Olson.

10.13(1)    Warrant to Purchase Common Stock, dated as of July 30, 1993
            issued to Richard J. Warburg and Ruth P. Warburg.
</TABLE>
    



<PAGE>   87
<TABLE>
<S>         <C>                                                  
10.14(1)    Warrant to Purchase Common Stock, dated as of December 28,
            1994 issued to Competitive Technologies, Inc.

10.15(1)    Warrant to Purchase Common Stock, dated as of December 29,
            1995 issued to Silicon Valley Bank.

10.16(1)    Warrant to Purchase Common Stock, dated July 26, 1996 issued
            to Silicon Valley Bank.

10.17(1)    Warrant to Purchase Common Stock, dated April 17, 1996,
            issued to Chiron Corporation.

10.18(1)    Collaborative Research, Development and Commercialization
            Agreement, dated July 15, 1994 between the Company and Chiron
            Corporation.

10.19(1)    Research Collaboration and Licensing Agreement, dated as of
            November 1, 1995 between the Company and Pharmacia Biotech,
            AB

10.20(1)    Research and Development Collaboration Agreement, dated as of
            April 19, 1993 between the Company and Parke-Davis Division
            of Warner-Lambert Company.

10.21(1)    First Amendment to the Research and Development Collaboration
            Agreement, dated April 19, 1993, dated as of April 17, 1995
            between the Company and Parke-Davis Division of
            Warner-Lambert Company.

10.22(1)    Second Amendment to the Research and Development
            Collaboration Agreement, dated April 19, 1993, dated as of
            February 8, 1996 between the Company and Parke-Davis Division
            of Warner-Lambert Company.

10.23(1)    Financing Agreement, dated March 16, 1995 among Wilderness
            Place Holdings L.L.C., Hambrecht & Quist Guaranty Finance,
            L.P. and the Company.

10.24(1)    Negotiable Promissory Note, dated October 7, 1992 between the
            Company and Ralph Christoffersen and Addendum dated June 25,
            1993.

10.25(1)    Employment Agreement, dated January 8, 1996 between the
            Company and Lawrence E. Bullock.

10.26(1)    Promissory Note, dated February 8, 1996 between the Company
            and Lawrence E. Bullock.

10.27(1)    Lease for Real Property, dated May 20, 1992 between Aero-Tech
            Investments and the Company.

10.28(1)    Non-Disturbance and Attornment Agreement, dated March 31,
            1995 among General American Life Insurance Company, Aero-Tech
            Investments, Wilderness Place Holdings L.L.C. and the
            Company.

10.29(1)    Master Lease Agreement, dated September 2, 1992 between the
            Company and LINC Scientific Leasing.

10.30(1)    Loan and Security Agreement, dated February 28, 1994 between
            the Company and Silicon Valley Bank.

10.31(1)    Loan Modification Agreement, dated December 21, 1994 between
            the Company and Silicon Valley Bank.

10.32(1)    Loan and Security Agreement, dated December 29, 1995 between
            the Company and Silicon Valley Bank and MMC/GATX Partnership
            No. 1.
</TABLE>



<PAGE>   88
   
<TABLE>
<S>         <C>                                                  
10.33(1)    Warrant to Purchase Common Stock, dated as of December 29,
            1995 issued to MMC/GATX Partnership No. 1

10.34(1)    Agreement, dated February 29, 1996 between the Company and
            Chiron Corporation relating to research and development
            funding.

10.35(3)    Amendments to original Employment Agreements between the
            Company and Ralph E. Christoffersen, Lawrence E. Bullock and
            Nassim Usman, pursuant to letters dated November 14, 1996,
            November 22, 1996 and December 15, 1996.

10.36(3)    Promissory Note, dated June 4, 1996 between the Company and
            Nassim Usman.

10.37(3)    Amendment to Lease for Real Property, dated March 13, 1997
            between Aero-Tech Investments and the Company.

10.38(2)    Employment Agreement, dated May 2, 1996 between the Company
            and Nassim Usman.

10.39(2)    Collaboration Agreement Regarding Use of Ribozymes to
            Determine Gene Function, dated May 13, 1996 between the
            Company and Chiron Corporation.

10.40(3)!   Amended and Restated License Agreement, dated November 20,
            1996, between the Company, University Research Corporation,
            University of Colorado and United States Biochemical
            Corporation.

10.41(3)!   Amended and Restated Sublicense Agreement, dated November 20,
            1996, between the Company and United States Biochemical
            Corporation.

10.42(3)!   Amended and Restated License Agreement, dated November 20,
            1996, between the Company and Competitive Technologies,
            Incorporated.

10.43(1)    Memorandum of Understanding, dated March 1, 1996 between the
            Company and DowElanco.

10.44(3)!   Stock Subscription Agreement, dated September 1996, between
            the Company and University of Research Corporation.

10.45(3)!   Stock Subscription Agreement, dated November 20, 1996,
            between the Company and United States Biochemical
            Corporation.

10.46(3)!   Assignment of License and Restated License Agreement, dated
            November 20, 1996, among the Company, United States
            Biochemical Corporation and Competitive Technologies.

10.47       No exhibit filed.

10.48       No exhibit filed.

10.49(3)!   License Agreement dated February 14, 1997, between the
            Company and IntelliGene, Ltd.

10.50(1)    Subscription Agreement, dated as of April 17, 1995, between
            the Company and Parke- Davis Division of Warner-Lambert
            Company.

10.51(1)    Stock Purchase Agreement, dated as of June 28, 1995, among
            the Company and certain investors.

10.52(1)    Agreement dated March 1, 1996, between the Company and
            DowElanco Corporation relating to the conversion of preferred
            stock.
</TABLE>
    



<PAGE>   89
   
<TABLE>
<S>         <C>                                                  
10.53(1)    Stock Subscription Agreement dated as of October 30, 1995,
            between the Company and Gewestelijke Investeringsmaatschappij
            voor Vlaanderon n.v.

10.54(4)!   Research, License, Supply and Royalty Agreement between
            Schering Aktiengesellschaft and the Company, dated April 9,
            1997.

10.55(4)!   Purchase Agreement dated as of April 9, 1997 among the
            Company, Schering Berlin Venture Corporation and Schering
            Aktiengesellschaft.

10.56*      Employment agreement dated February 27, 1997 between the
            Company and Alene Holzman.

10.57*      Employment agreement dated July 5, 1997 between the Company
            and Thomas Rossing.

11.1(3)(5)  Statement regarding calculation of net loss per share.

23.1        Consent of Ernst & Young LLP, Independent Auditors.

23.2        Consent of Rothgerber, Appel, Powers & Johnson LLP, refer to
            Exhibit 5.1.

23.3*       Consent of Lyon & Lyon.

24.1*       Power of Attorney.
</TABLE>
    


   
*        Previously filed.
    

!        The Company has applied for confidential treatment with respect to
         portions of these Exhibits.

(1)      Incorporated by reference to the Company's Form SB-2 Registration
         Statement, File No. 333-1908-D.

(2)      Incorporated by reference to the Company's Form 10-QSB for the quarter
         ended June 30, 1996.

(3)      Incorporated by reference to the Company's Form 10-KSB for the year
         ended December 31, 1996.

(4)      Incorporated by reference to the Company's Form 8-K dated June 12,
         1997.

(5)      Incorporated by reference to the Company's Form 10-QSB for the quarter
         ended June 30, 1997.


<PAGE>   1
                                  EXHIBIT 3.1

                              AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION

                                       OF

                         RIBOZYME PHARMACEUTICALS, INC.



                                       I.

         The name of this corporation is Ribozyme Pharmaceuticals, Inc.

                                      II.

         The address of the registered office of the corporation in the State
of Delaware is Corporation Trust Center, 1209 Orange Street, City of
Wilmington, County of New Castle, and the name of the registered agent of the
corporation in the State of Delaware at such address is The Corporation Trust
Company.

                                      III.

         The purpose of this corporation is to engage in any lawful act or
activity for which a corporation may be organized under the General Corporation
Law of the State of Delaware.

                                      IV.

         A.  This corporation is authorized to issue two classes of stock to be
designated, respectively, "Common Stock" and "Preferred Stock." The total number
of shares which the corporation is authorized to issue is twenty-five million
(25,000,000) shares. Twenty million (20,000,000) shares shall be Common Stock,
each having a par value of $.01. Five million (5,000,000) shares shall be
Preferred Stock, each having a par value of $.01.

         B.  The Preferred Stock may be issued from time to time in one or more
series. The Board of Directors is hereby authorized, by filing a certificate (a
"Preferred Stock Designation") pursuant to the Delaware General Corporation Law,
to fix or alter from time to time the designation, powers, preferences and
rights of the shares of each such series and the qualifications, limitations or
restrictions of any wholly unissued series of Preferred Stock, and to establish
from time to time the number of shares constituting any such series or any of
them; and to increase or decrease the number of shares of any series subsequent
to the issuance of shares of that series, but not below the number of shares of
such series then outstanding. In case the number of shares of any series shall
be decreased in accordance with the foregoing sentence, the shares constituting
such decrease shall resume the status that they had prior to the adoption of the
resolution originally fixing the number of shares of such series.
<PAGE>   2
                                       V.

         For the management of the business and for the conduct of the affairs
of the corporation, and in further definition, limitation and regulation of the
powers of the corporation, of its directors and of its stockholders or any
class thereof, as the case may be, it is further provided that:

         A.

             (1)  The management of the business and the conduct of the affairs
of the corporation shall be vested in its Board of Directors. The number of
directors which shall constitute the whole Board of Directors shall be fixed
exclusively by one or more resolutions adopted by the Board of Directors.

             (2)  Subject to the rights of the holders of any series of
Preferred Stock to elect additional directors under specified circumstances,
directors shall be elected at each annual meeting of stockholders for a term of
one year. Each director shall serve until his successor is duly elected and
qualified or until his death, resignation or removal. No decrease in the number
of directors constituting the Board of Directors shall shorten the term of any
incumbent director.

             (3)  Subject to the rights of the holders of any series of
Preferred Stock, no director shall be removed without cause. Subject to any
limitations imposed by law, the Board of Directors or any individual director
may be removed from office at any time with cause by the affirmative vote of the
holders of a majority of the Voting Stock.

             (4)  Subject to the rights of the holders of any series of
Preferred Stock, any vacancies on the Board of Directors resulting from death,
resignation, disqualification, removal or other causes and any newly created
directorships resulting from any increase in the number of directors, shall,
unless the Board of Directors determines by resolution that any such vacancies
or newly created directorships shall be filled by the stockholders, except as
otherwise provided by law, be filled only by the affirmative vote of a majority
of the directors then in office, even though less than a quorum of the Board of
Directors, and not by the stockholders. Any director elected in accordance with
the preceding sentence shall hold office for the remainder of the full term of
the director for which the vacancy was created or occurred and until such
director's successor shall have been elected and qualified. 

         B.

             (1)  Subject to paragraph (i) of Section 41 of the Bylaws, the
Bylaws may be altered or amended or new Bylaws adopted by the affirmative vote
of at least sixty-six and two-thirds percent (66-2/3 %) of the voting power of
all of the then- outstanding shares of the Voting Stock. The Board of Directors
shall also have the power to adopt, amend, or repeal Bylaws.

             (2)  The directors of the corporation need not be elected by
written ballot unless the Bylaws so provide.




                                       2
<PAGE>   3
             (3)  No action shall be taken by the stockholders of the
corporation except at an annual or special meeting of stockholders called in
accordance with the Bylaws and no action shall be taken by the stockholders by
written consent.

             (4)  Special meetings of the stockholders of the corporation may be
called, for any purpose or purposes, by (i) the Chairman of the Board of
Directors, (ii) the Chief Executive Officer, or (iii) the Board of Directors
pursuant to a resolution adopted by a majority of the total number of authorized
directors (whether or not there exist any vacancies in previously authorized
directorships at the time any such resolution is presented to the Board of
Directors for adoption), and shall be held at such place, on such date, and at
such time as the Board of Directors shall fix.

             (5)  Advance notice of stockholder nominations for the election of
directors and of business to be brought by stockholders before any meeting of
the stockholders of the corporation shall be given in the manner provided in the
Bylaws of the corporation.

                                      VI.

         A.  A director of the corporation shall not be personally liable to the
corporation or its stockholders for monetary damages for any breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived an improper
personal benefit. If the Delaware General Corporation Law is amended after
approval by the stockholders of this Article to authorize corporate action
further eliminating or limiting the personal liability of directors, then the
liability of a director shall be eliminated or limited to the fullest extent
permitted by the Delaware General corporation Law, as so amended.

         B.  Any repeal or modification of this Article VI shall be prospective
and shall not affect the rights under this Article VI in effect at the time of
the alleged occurrence of any act or omission to act giving rise to liability or
indemnification.

                                      VII.

         A.  The corporation reserves the right to amend, alter, change or
repeal any provision contained in this Certificate of Incorporation, in the
manner now or hereafter prescribed by statute, except as provided in paragraph B
of this Article VII, and all rights conferred upon the stockholders herein are
granted subject to this reservation.

         B.  Notwithstanding any other provisions of this Certificate of
Incorporation or any provision of law which might otherwise permit a lesser vote
or no vote, but in addition to any affirmative vote of the holders of any
particular class or series of the Voting Stock required by law, this Certificate
of Incorporation or any Preferred Stock Designation, the affirmative vote of the
holders of at least sixty-six and two-thirds percent (66-2/3 %) of the voting
power of all of the





                                       3
<PAGE>   4
then-outstanding shares of the Voting Stock, voting together as a single class,
shall be required to alter, amend or repeal Articles.

         IN WITNESS WHEREOF, this Certificate has been subscribed this 17th day
of April, 1996 by the undersigned who affirms that the statements made herein
are true and correct.








                                       4

<PAGE>   1





              (Rothgerber, Appel, Powers & Johnson LLP Letterhead)





                                  EXHIBIT 5.1


                                     (Date)



Board of Directors
Ribozyme Pharmaceuticals, Inc.
2950 Wilderness Place
Boulder, Colorado 80301

Gentlemen:

You have requested our opinion with respect to certain matters in connection
with the filing by Ribozyme Pharmaceuticals, Inc., a Delaware corporation (the
"Company") of a Registration Statement on Form SB-2 (the "Registration
Statement") with the Securities and Exchange Commission (the "Commission"),
including a prospectus to be filed with the Commission pursuant to Rule 424(b)
of Regulation C promulgated under the Securities Act of 1933, as amended (the
"Prospectus"), relating to a best efforts placement of up to 1,400,000 shares
of the Company's Common Stock (the "Common Stock").

In connection with this opinion, we have reviewed (i) the Company's Amended and
Restated Certificate of Incorporation and Bylaws, as amended, and the originals
or copies certified to our satisfaction, of such records, documents,
certificates, memoranda and other instruments as in our judgment are necessary
or appropriate to enable us to render the opinion expressed below and (ii)
assumed that the shares of the Common Stock will be sold at a price and upon
terms established by the Pricing Committee of the Board of Directors of the
Company.

On the basis of the foregoing, and in reliance thereon, we are of the opinion
that the Common Stock, when sold and issued in accordance with the Registration
Statement and related Prospectus, will be validly issued, fully paid and
nonassessable.
<PAGE>   2
We consent to the reference to our firm under the caption "Legal Matters" in
the Prospectus included in the Registration Statement and to the filing of this
opinion as an exhibit to the Registration Statement.

                               Very truly yours,

                               ROTHGERBER, APPEL, POWERS & JOHNSON LLP


                               /s/ Herbert H. Davis III
                               ------------------------------------------------
                               Herbert H. Davis III

HHD/clw
enclosure

<PAGE>   1
                                                                   Exhibit 23.1



                        CONSENT OF INDEPENDENT AUDITORS



   
We consent to the reference to our firm under the captions "Selected Financial
Data" and "Experts" and to the use of our report dated February 6, 1997, in the
Amendment to Registration Statement on Form SB-2 and related Prospectus of 
Ribozyme Pharmaceuticals, Inc. for the registration of 1,400,000 shares of its 
Common Stock.
    




Denver, Colorado
   
September 15, 1997                                             ERNST & YOUNG LLP
    



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