APROGENEX INC
S-3, 1996-08-08
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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      As filed with the Securities and Exchange Commission 
                   on August 8, 1996
                         Registration No. 33-[           ] 
- -----------------------------------------------------------------
- -

         SECURITIES AND EXCHANGE COMMISSION
              WASHINGTON, D.C.  20549
                   --------------
                      FORM S-3
               REGISTRATION STATEMENT
                       UNDER
             THE SECURITIES ACT OF 1933 
                   --------------
                   APROGENEX, INC
  (Exact name of registrant as specified in its charter)

      Delaware                      76-0269632
(State or other jurisdiction     (I.R.S. Employer
of incorporation or organization) Identification No.)          
     8000 El Rio Street, Houston, Texas 77054-4104
                   (713) 748-5114
(Address, including zip code, and telephone number, including 
area code, of registrant's principal executive offices)
                   --------------
                   J. Donald Payne
        Vice President and Chief Financial Officer
                   Aprogenex, Inc.
       8000 El Rio Street, Houston, Texas 77054-4104
                   (713) 748-5114
     (Name, address, including zip code, and telephone number,
        including area code, of agent for service)
                   --------------
Approximate date of commencement of proposed sale to the 
public:  From time to time after this Registration Statement 
becomes effective.

If the only securities being registered on this Form are to be 
offered pursuant to dividend or interest reinvestment plans, 
please check the following box. [  ]

If any of the securities being registered on this Form are to be 
offered on a delayed or continuous basis pursuant to Rule 415 
under the Securities Act of 1933, other than securities offered 
only in connection with dividend or interest reinvestment plans, 
check the following box. [X]

CALCULATION OF REGISTRATION FEE
=================================================================
=
                             Proposed    Proposed
 Title of                    maximum     maximum     Amount
securities     Amount        offering    aggregate     of
  to be        to be         price per   offering  registration
registered   registered (1)  share (2)   price (2)   fee (3)
- -----------------------------------------------------------------
- -
Common Stock, 6,160,540        $1.00     $6,160,540   $1,176
 par value      shares
 $.001 per
 share
=================================================================
=

(1)  This Registration Statement covers all Common Stock into 
which the Convertible Notes, Series A Convertible Preferred Stock 
and Warrants to purchase Series A Convertible Preferred Stock are 
or may be initially convertible (plus an indeterminate number of 
shares of Common Stock to cover any adjustment in the number of 
shares issuable as a result of the antidilution provisions of the 
Convertible Notes, Series A Convertible Preferred Stock and 
Warrants to purchase Series A Convertible Preferred Stock), plus 
Common Stock issuable upon conversion of accrued interest that 
may accrue through maturity of the Convertible Notes, certain 
other shares of Common Stock being registered for resale by 
existing stockholders, and includes 2,768,800 shares of Common 
Stock which has been previously registered for resale as set 
forth in Note 3 below. 
(2)  Estimated pursuant to Rule 457(c) solely for purposes of 
computing the registration fee and based upon the average of the 
high and low sales prices reported on the American Stock Exchange 
on August 7, 1996.
(3)  Excludes registration fees of $2,721 that were previously 
paid in connection with the Registration Statement No. 33-95014 
on Form S-3 for 2,524,500 shares of Common Stock and $532 
previously paid in connection with Registration Statement No. 33-
92780 on Form S-3 for 244,300 shares of Common Stock.

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 which 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.

Pursuant to Rule 429 under the Securities Act of 1933, the 
Prospectus included in this Registration Statement is a combined 
Prospectus and relates to Registration Statement No. 33-95014 
previously filed by the Registrant on Form S-3 and declared 
effective on October 24, 1995 and Registration Statement No. 33-
92780 previously filed by the Registrant on From S-3 and declared 
effective on October 24, 1995.
================================================================





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 AN 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 August 8, 1996
                     PROSPECTUS

                  6,160,540 Shares

                   APROGENEX, INC.
                    COMMON STOCK 
             (par value $0.001 per share)

The 6,160,540 shares (the "Shares") of common stock, par value 
$0.001 per share (the "Common Stock"), of Aprogenex, Inc., a 
Delaware corporation ("Aprogenex" or the "Company"), offered 
hereby are being sold by certain stockholders of the Company (the 
"Selling Stockholders").  See "Selling Stockholders."  Certain of 
the Shares are issuable upon conversion of principal and accrued 
interest on the Convertible Notes dated as of June 12, 1996 (the 
"Convertible Notes") issued to certain of the Selling 
Stockholders in a private placement by the Company, certain of 
the Shares are issuable upon conversion of Series A Convertible 
Preferred Stock, par value $.01 per share (the "Series A 
Convertible Preferred Stock"), issued to stockholders in a 
private placement by the Company or warrants to purchase Series A 
Convertible Preferred Stock issued to representatives of the 
placement agent in such private placement, and the remainder of 
the Shares were previously issued by the Company in private 
placements that granted shareholders or certain of their 
transferees registration rights.  See "Prospectus Summary_Recent 
Developments_Sale of Convertible Notes and Warrants."  The 
Company will not receive any part of the proceeds of the sale of 
the Shares.  The Company has applied for the listing of the 
Shares on the American Stock Exchange.

Sales of the Shares by the Selling Stockholders may be made from 
time to time in one or more transactions, including block 
transactions, on the American Stock Exchange, or any other 
exchange or quotation system on which the Common Stock may be 
admitted for trading (collectively, the "Exchanges"), pursuant to 
and in accordance with the applicable rules of the Exchanges, in 
negotiated transactions or in a combination of any such methods 
of sale, at fixed prices that may be changed, at market prices 
prevailing at the time of sale, at prices related to such 
prevailing market prices or at negotiated prices.  The Shares may 
be offered directly, to or through agents designated from time to 
time, or to or through brokers or dealers, or through any 
combination of such methods of sale.  Such agents, brokers or 
dealers may receive compensation in the form of discounts, 
concessions or commissions from the Selling Stockholders and/or 
the purchasers of the Shares for whom such broker-dealers may act 
as agents or to whom they act as principals, or both (which 
compensation as to a particular broker-dealer might be in excess 
of customary commissions).  A member firm of an Exchange may be 
engaged to act as a Selling Stockholder's agent in the sale of 
Shares by such Selling Stockholder.  To the extent required, 
specific information regarding the Shares will be set forth in an 
accompanying Prospectus Supplement.  See "Plan of Distribution".  
The Selling Stockholders and any brokers, dealers, agents or 
others that participate with the Selling Stockholders in the 
distribution of the Shares may be deemed to be "underwriters" 
within the meaning of the Securities Act of 1933, as amended (the 
"Securities Act"), and any commissions received by such persons 
and any profit on the resale of the Shares purchased by such 
persons may be deemed to be underwriting commissions or discounts 
under the Securities Act.  The Company has agreed to indemnify 
the Selling Stockholders against certain liabilities, including 
liabilities under the Securities Act.  See "Plan of 
Distribution".

The Common Stock is listed on the American Stock Exchange under 
the symbol "APG".  On August 7, 1996, the closing sales price of 
the Common Stock as reported on the American Stock Exchange was 
$1 per share.

The Common Stock offered hereby involves a high degree of 
risk.  See "Risk Factors" beginning on page 5 of this 
Prospectus.
                  ----------------------

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.
                  ----------------------
The date of this Prospectus is August [  ], 1996.

                                1        



No person has been authorized to give any information or to 
make any representations other than those contained in this 
Prospectus in connection with the offer made by this 
Prospectus and, if given or made, such information or 
representations must not be relied upon as having been 
authorized by the Company. This Prospectus does not 
constitute an offer to sell or a solicitation of any offer 
to buy any of the Common Stock by anyone in any jurisdiction 
in which such offer or solicitation is not authorized, or in 
which the person making such offer or solicitation is not 
qualified to do so, or to any person to whom it is unlawful 
to make such offer or solicitation is not qualified to do 
so, or to any person to whom it is unlawful to make such 
offer or solicitation.  Neither the delivery of this 
Prospectus nor any sale made hereunder shall, under any 
circumstances, create any implication that information 
contained herein is correct as of any time subsequent to the 
date hereof.

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 statements and 
other information with the Securities and Exchange Commission 
(the "Commission"), which can be inspected and copied at the 
public reference facilities maintained by the Commission at 450 
Fifth Street, N.W., Judiciary Plaza, Room 1024, Washington, D.C. 
20549; and at the regional offices of the Commission at 500 West 
Madison Street, Suite 1400, Chicago, Illinois 60661 and at 7 
World Trade Center, New York, New York 10048.  Copies of such 
material can be obtained from the Public Reference Section of the 
Commission at 450 Fifth Street, N.W., Judiciary Plaza, 
Washington, D.C. 20549 at prescribed rates.  The Commission 
maintains an Internet web site that contains reports, proxy and 
information statements and other information regarding 
registrants that file electronically with the Commission 
(http://www.sec.gov).  The Company's Common Stock is listed on 
the American Stock Exchange, and such reports, proxy statements 
and other information concerning the Company also may be 
inspected at the offices of the American Stock Exchange, 86 
Trinity Place, New York, New York 10006.

This Prospectus does not contain all the information set forth in 
the Registration Statement of which it forms a part and which has 
been filed by the Company with the Commission.  Such additional 
information may be obtained by mail from the Public Reference 
Branch of the Commission at 450 Fifth Street, N.W., Washington, 
D.C. 20549, and may be inspected and copied at the public 
reference facilities maintained by the Commission at Room 1024, 
450 Fifth Street, N.W., Washington, D.C. 20549.  Statements 
contained in this Prospectus as to the contents of any agreement 
or other document referred to herein summarize the elements of 
such agreement or document so that the discussion in this 
Prospectus does not omit to state a material fact necessary to 
make such discussion not misleading; however, such statements are 
not necessarily complete, and in each instance reference is made 
to the copy of such agreement or other document filed as an 
exhibit to the Registration Statement, each such statement being 
qualified in its entirety by such reference.

                     TABLE OF CONTENTS
                           Page                             Page
                           ----                             ----
Available Information.....   2  Description of Convertible
Incorporation of Certain            Notes..................  12
  Documents by Reference..   2  Description of Capital
Prospectus Summary........   4    Stock..................   12
The Company...............   4  Selling Stockholders.....   12
Recent Developments.......   4  Plan of Distribution......  24
Risk Factors..............   5  Legal Matters.............  25
Forward-Looking Statements   5  Experts...................  25
Use of Proceeds...........  12

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

The following documents, which have been filed by the Company 
with the Commission pursuant to the Exchange Act (File No. 1-
12416), are incorporated in this Prospectus by reference and 
shall be deemed to be a part hereof:

(a)	The Company's Annual Report on Form 10-KSB for the year ended 
December 31, 1995;

(b)	The description of the Common Stock contained in the 
Company's Registration Statement on Form 8-A dated September 
20, 1993;

(c)	The Company's Quarterly Report on Form 10-QSB for the quarter 
ended March 31, 1996;

                                 2



(d)	The Company's Quarterly Report on Form 10-QSB for the quarter 
ended June 30, 1996;

(e)	The Company's Current Reports on Form 8-K dated April 1, 1996 
and June 12, 1996; and

(f)	The Company's Proxy Statement dated as of June 7, 1996, 
relating to the annual meeting of stockholders held on July 
12,1996, as adjourned from June 24, 1996.

All documents filed by the Company pursuant to Section 13(a), 
13(c), 14 or 15(d) of the Exchange Act subsequent to the date of 
this Prospectus and prior to the termination of the offering made 
hereby shall be deemed to be incorporated by reference in this 
Prospectus and to be a part hereof from the date of the filing of 
such documents.  Any statement contained in this Prospectus, in a 
supplement to this Prospectus or in a document incorporated or 
deemed to be incorporated by reference herein shall be deemed to 
be modified or superseded for purposes of this Prospectus to the 
extent that a statement contained herein or in any subsequently 
filed supplement to this Prospectus or in any document that also 
is or is deemed to be incorporated by reference herein modifies 
or supersedes such statement.  Any statement so modified or 
superseded shall not be deemed, except as so modified or 
superseded, to constitute a part of this Prospectus.

The Company hereby undertakes to provide without charge to each 
person, including any beneficial owner, to whom a copy of this 
Prospectus has been delivered, on the written or oral request of 
any such person, a copy of any or all of the documents referred 
to above that have been or may be incorporated in this Prospectus 
by reference, other than exhibits to such documents (unless such 
exhibits are specifically incorporated by reference in such 
documents).  Written or telephone requests for such copies should 
be directed to the Company at its principal executive offices 
located at 8000 El Rio Street, Houston, Texas 77054-4104, 
Attention: Secretary (telephone number: (713) 748-5114).

The Company has filed applications to register APROGENEX, the 
Company's logo, RIGHTECHNOLOGY, APROPROBE, PAP PLUS, VIRAFLOW and 
VIRAFY as trademarks with the United States Patent and Trademark 
Office.

                                  3



                    PROSPECTUS SUMMARY

The following summary is qualified in its entirety by the more 
detailed information statements appearing elsewhere in this 
Prospectus or incorporated by reference herein.  The Common Stock 
offered hereby involves a high degree of risk.  See "Risk 
Factors."

                      THE COMPANY

Aprogenex, Inc. ("Aprogenex" or the "Company") develops, 
manufactures and intends to market diagnostic test systems based 
on its proprietary DNA probe technology to identify the presence 
or extent of genetic abnormalities and disease.  The Company's 
Rapid Intact Gene Hybridization Technology ("RIGHTechnology") 
utilizes the Company's chemically manufactured probes and 
proprietary "cocktail" reagent solution which allows analysis of 
single intact cells at a molecular level.  

The Company believes that its RIGHTechnology has significantly 
advanced and simplified DNA probe technology, allowing highly 
sensitive and specific tests to be accomplished in a process that 
is more rapid than any currently available for intact cell 
analysis.  The basic research underlying the Company's technology 
was conducted by one of the Company's founders and others at the 
University of Texas M.D. Anderson Cancer Center.

The Company's resources are currently focused on product 
development activities in two areas.  The first is an assay to 
detect Human Immunodeficiency Virus ("HIV") activity in intact 
cells for use in drug development efforts or in monitoring 
patient therapy.  The second is components of a test for prenatal 
genetic disorders using fetal cells circulating in maternal blood 
that could mitigate the need for invasive procedures such as 
amniocentesis.  In addition to these applications in virology and 
genetics, the Company in prior years also performed limited 
studies for applications of its technology in the areas of 
oncology and microbiology.

Aprogenex is currently developing an assay that will permit 
detection of HIV within cells and, unlike any currently available 
product, will enable quantification of viral activity within 
infected cells (i.e., viral load).  The ViraFlow assay uses DNA 
probes for HIV RNA ("RNA") to detect and quantitate HIV activity.  
The Company's development activities in this area are focused on 
two separate market opportunities.  The first is a "For-Research-
Use-Only" assay to screen drugs for effectiveness against the 
virus.  This product is expected to be available for sale in 1996 
to potential customers, which are pharmaceutical companies with 
HIV drug development efforts.  The ViraFlow test is designed to 
measure HIV viral activity in cells before and after treatment 
with potential drug candidates, thereby measuring the 
effectiveness of the drug candidate.

The second HIV market opportunity is a clinical product for use 
in monitoring the effectiveness of drug therapy in HIV-infected 
patients.  The Company has begun development activities to format 
its ViraFlow assay for use in patient samples, but has performed 
limited testing to date.  Any such product would require 
extensive regulatory approvals before marketing.

The World Health Organization estimated that there were 
approximately 17 million HIV infected people worldwide in 1994.  
Of that number, approximately 1.1 million were in the United 
States and the European Union, which the Company believes will be 
its principal markets for this product.  Numerous pharmaceutical 
companies have research efforts to develop drugs to combat the 
virus or the effects of HIV infection.  The Company believes that 
the number of HIV-infected individuals receiving therapeutic 
treatment, and the complexity of such treatment, will increase as 
new drugs receive regulatory approval.

The Company's efforts in prenatal genetics are currently focused 
on two separate product opportunities: (i) developing "For-
Research-Use-Only" DNA probe products to identify certain 
chromosomes, abnormal numbers of which account for common 
prenatal genetic disorders (the "AproProbe" product),  and (ii) 
marketing the AproProbe product line as a component to other 
companies attempting to develop their own version of a product 
that would use fetal cells circulating in a mother's blood to 
screen for prenatal genetic disorders.  

The Company believes that the potential market for a non-invasive 
procedure to screen for prenatal genetic disorders could be 
extensive.  Using a maternal blood sample, such products would be 
designed to identify the rare fetal cells circulating within the 
mother's blood and to permit the diagnosis of genetic disorders 
that account for up to 95% of prenatal genetic abnormalities, 
such as Down's Syndrome.  If successfully developed, the Company 
believes that such products could provide a rapid, cost-effective 
method of screening pregnancies for early detection of genetic 
abnormalities, providing a non-invasive test which could 
supersede currently available blood screening tests and mitigate 
the need for many amniocentesis and chorionic villus sampling 
("CVS") procedures, thereby avoiding the risks associated with 
such procedures including spontaneous miscarriage and damage to 
the fetus.  During 1992, there 

                                 4



were approximately 4.0 million live births in the United States 
and 4.3 million in the Western Europe, the areas the Company 
considers to be the primary markets for such a product.  

There are a number of research groups currently focusing on the 
development of enrichment systems, which are  processes designed 
to enrich the fetal component in a maternal blood sample by 
reducing the number of maternal cells (i.e., to concentrate the 
fetal cells present in the maternal blood sample).  It is 
expected that any successfully developed enrichment system will 
require DNA probes to screen the fetal cells for genetic 
disorders.  Accordingly, the Company's strategy currently is to 
separately market its DNA probe products as components to other 
companies developing their own versions of a complete prenatal 
genetics screen using maternal blood.  

The Company began the sale of a "For-Research-Use-Only" version 
of AproProbe in 1995.  The principal customers for these DNA 
probe products have been laboratories conducting research on more 
rapid methods of providing amniocentesis results than through 
karyotyping, as well as certain companies conducting research on 
their own enrichment systems.  The Company believes this is a 
limited market and does not expect significant sales volumes from 
this sales effort until such time as an enrichment system is 
successfully developed by others and such companies select the 
Company as the supplier of DNA probe products for such system.  
The Company previously was engaged in the development of its own 
enrichment system as well as in efforts to license the enrichment 
systems of others; both such efforts were ended in 1996 in 
conjunction with the Company's collaboration efforts with other 
companies developing enrichment systems.  

Aprogenex from time to time also engages in discussions with 
diagnostic companies regarding collaborative arrangements 
regarding the Company's RIGHTechnology.  Such arrangements, if 
consummated, may include joint research and development, product 
distribution or license or sale of the technology for specific 
applications.  There can be no assurance, however, that the 
Company will enter into any such arrangements.

The Company was incorporated in Delaware in 1988 under the name 
Molecular Analysis Incorporated. Effective August 20, 1992, the 
Company's name was changed to Aprogenex, Inc.  The Company's 
principal executive offices are located at 8000 El Rio Street, 
Houston, Texas 77054-4104, and its telephone number is 
(713) 748-5114.


RECENT DEVELOPMENTS

Sale of Convertible Notes and Warrants.  On June 12, 1996, 
Aprogenex, Inc. (the "Company") completed the sale of $2,005,000 
of convertible notes (the "Convertible Notes") and warrants to 
acquire 130,323 shares of Common Stock, $.001 par value (the 
"1996 Warrants") in a private placement.  The Convertible Notes 
are due May 28, 1998 and are convertible into Common Stock at the 
rate of one share of Common Stock for every $1.10 in principal 
and interest owed, subject to certain adjustments.  The Warrants 
are exercisable at $1.10 per share and expire on May 28, 1999.  
See "Description of Convertible Notes" and "Description of 
Capital Stock_Options and Warrants".

Board of Directors.  In August, 1996. Philippe Sommer and 
Robert De Cresce, M.D., were elected to the Board of Directors.  
Mr. Sommer is the President of Alsacia & Sommer, Inc., which 
provides consulting services to early-stage health care 
companies.  Mr. Sommer is also the President of Alsacia Venture 
Management, Inc., which provides management services to Medical 
Venture Holdings, Inc., which is the general partner of the 
managing general partner of WestMed Venture Partners, L.P. See 
"Selling Stockholders." Mr. Sommer was previously a director of 
the Company from 1989 until October, 1994.  Dr. De Cresce is 
Assistant Vice President and Director of Clinical Laboratories of 
Rush-Presbyterian Medical Center in Chicago, Illinois.


                     RISK FACTORS

In evaluating the Company and its business, prospective investors 
should carefully consider the following risk factors.  Because an 
investment in the Common Stock involves a high degree of risk, 
only investors who can bear such risk should purchase Common 
Stock offered hereby.


Anticipated Losses and Uncertainty of Future Profitability.  

The Company is in the development stage and has not begun to 
market or generate significant revenues from any products.  The 
Company has incurred substantial operating losses since its 
inception and expects to incur substantial operating losses until 
such time, if ever, as there is sufficient commercialization of 
the Company's products to offset its research, development, 
clinical investigation, marketing and general and administrative 
costs.  The Company does not believe that it is likely that the 
sales of its "For Research Use Only" genetic testing products 
will provide sufficient commercialization to fund its operations.  
The Company can not currently predict the success or market 
acceptance of its "For Research Use Only" HIV product.  There can 
be no assurance that the Company will ever achieve profitability 
or that its products will be marketed successfully or become 
commercially viable. There can be no assurance that the Company 
will not encounter substantial expenses related to further 
testing and development, regulatory compliance, production and 
marketing problems, and competition or defense of the Company's 
license and patent rights. 

Requirement for Additional Financing; Explanatory Paragraph 
to Auditors' Report.  

The Company expects to seek financing in 1996 to fund its 
operations during 1997 and later years.  The Company's 

                                 5



current cash resources are expected to fund the Company's normal 
operations through the end of 1996.  The Company will seek to 
obtain additional funds through equity or debt financing, 
collaborative or other arrangements with corporate partners and 
others, and from other sources.  There can be no assurance that 
there will be significant sales of the Company's products or that 
such revenues will be sufficient for operations.  In such event, 
the Company would also be required to seek additional funds. 
There can be no assurance that additional financing, whenever 
required, will be available when needed or on terms acceptable to 
the Company.  If adequate funds are not available, the Company 
may be required to delay or to eliminate expenditures for certain 
of its products, to license to third parties the rights to 
commercialize additional products or technologies that the 
Company would otherwise seek to develop itself or if no other 
reasonable alternative is available, to cease operations.  

The report of the Company's independent auditors on the financial 
statements for the year ended December 31, 1995 includes an 
explanatory paragraph with respect to the need for future 
financing and expresses substantial doubt as to the Company's 
ability to continue as a going concern if such needs are not met.  
A similar opinion is expected for the year ended December 31, 
1996 unless the Company can obtain sufficient resources to fund 
its operations beyond 1997.

Uncertainty of Repayment of Convertible Notes.  

As indicated above, there can no assurance that the Company will 
ever achieve profitability or that it will receive significant 
revenues from the sale of products.  There can be no assurance 
that the Company will have sufficient funds available from 
operations to repay the Convertible Notes upon maturity in 1998, 
or that the Company can or will obtain such funds from other 
sources.  If additional debt securities are issued prior to the 
repayment of the Convertible Notes, a portion of the Company's 
cash flow will have to be dedicated to payment of principal and 
interest on such indebtedness, reducing the cash flow available 
to repay the Convertible Notes, and the Company may be subject to 
certain restrictive financial and operating restrictions in the 
agreements and instruments relating to such indebtedness. If the 
Company has insufficient resources at the maturity of the 
Convertible Notes, or is unable to induce the holders thereof to 
convert the Convertible Notes into Common Stock, the Company may 
be forced to seek bankruptcy protection from its creditors, to 
sell assets, and/or to liquidate.  There can be no assurance 
that, in the event of any liquidation proceeding or dissolution, 
that the Company will have sufficient assets to repay the 
principal and accrued interest on the Convertible Notes.  

Expected Future Dilution to Stockholders.  

As discussed above, the Company believes it is likely that it 
will be required to raise funds to fund its future operations.  
If additional funds are raised by the Company through issuing 
equity securities, dilution to stockholders may occur.  The Board 
of Directors of the Company is empowered, without stockholder 
approval (other than in certain cases approvals of the holders of 
the Series A Convertible Preferred Stock), to issue additional 
shares of Series A Preferred Stock or other series of preferred 
stock with dividend, liquidation, conversion, voting and other 
rights that could adversely affect the voting power or other 
rights of the holders of the Company's securities.  Any such 
sales of securities may occur at any time and may be at a price 
below then-current trading prices of the Company's Common Stock.  

Products in Early State of Development.  

The Company's products are in various early stages of development 
and will require substantial additional investment, laboratory 
development, clinical investigation and regulatory approval prior 
to their commercialization for diagnostic purposes.  There can be 
no assurance that the Company will be successful in developing 
such existing or future products, that such products will prove 
to be efficacious in clinical investigations, that required 
regulatory approvals can be obtained for such products or that 
such products, if developed and approved, will be capable of 
being manufactured in commercial quantities at reasonable costs.  
There can be no assurance that the Company will not encounter 
substantial delays in the development and testing of its 
products.  Certain applications of the Company's proprietary DNA 
probe technology may require special formats or processing or 
handling technologies for which the Company may not then have any 
expertise.  There can be no assurance that the Company will be 
able to develop such special technologies at an acceptable cost 
or at all, or that it will be able to acquire such technologies 
from other parties on acceptable terms or at all.

The Company has not completed all development activities for, nor 
has it performed extensive testing, of its HIV drug development 
or clinical products or its prenatal genetic screening products.  
There can be no assurances that any products will be successfully 
developed.  The Company believes the market opportunity for 
genetic testing products in general will be limited prior to the 
development of an enrichment system by others and that there can 
be no assurance that such a system will ever be successfully 
developed.  In particular, the market opportunity for the 
Company's products, even if such a system is successfully 
developed by others, will be limited unless the Company's 
AproProbe product line is used in conjunction with such system.  
The terms of such use, whether by marketing arrangement, license 
or otherwise, may not be financially beneficial to the Company.    

Uncertainty of Developing Markets for Products.  

The market for DNA probe tests is only now developing and has to 
date been limited to market niches.  The Company's success will 
depend not only upon 

                                 6



capturing customers in existing markets but also on the 
development of new markets in response to the Company's products.  
There can be no assurance that the Company's products will be 
marketed successfully or will be accepted by the medical 
diagnostic community, that the Company's products will be 
competitive with other technologies or products available to 
potential customers, or that market demand for such products will 
be sufficient to allow profitable operations.  While the Company 
has identified certain broad target markets for its products, 
there can be no assurance as to what portion of such target 
markets, if any, will find the Company's tests to be either 
applicable or to be a preferable alternative to other diagnostic 
tests or procedures.  

Products and Exports Subject to U.S. and Foreign Regulatory 
Approval.  

The Company intends to market its products throughout the world.  
The Company's products are subject to extensive regulation by 
governmental authorities in the United States, particularly the 
Food And Drug Administration (the "FDA") as well as health 
authorities in foreign countries.  The FDA and corresponding 
health authorities in other countries impose substantial 
requirements which must be satisfied before newly developed 
products may be sold for diagnostic use. The FDA, and similar 
agencies in foreign countries, have promulgated substantial 
regulations which apply to the testing, marketing, export and 
manufacturing of diagnostic products.  The Company has not 
applied for and does not have the approval of the FDA or any 
foreign country to sell its products in any such country for 
diagnostic use, nor has the Company been inspected for compliance 
with any regulatory requirements.  There can be no assurance that 
any required regulatory permissions or approvals will be received 
on a timely basis or at all.  The failure of the Company's 
products to receive requisite approvals, or significant delays in 
obtaining any such approvals, could have a materially adverse 
effect on the business of the Company.  There can be no assurance 
that any of the Company's products will receive any such approval 
or, even if a particular product does receive such approval, that 
the Company will ever recover its costs in connection with 
obtaining such approval.

Prior to receipt of FDA approvals, the Company's products may be 
sold in the United States "For Laboratory Use," "For Research Use 
Only" or "For Investigational Use Only" and must be labeled 
accordingly.  Regulatory authorities could require the Company to 
cease sales of such products if such authorities determine or 
contend misuse of the products by customers.  

In addition, approval by the FDA to export the products may be 
required before sales for diagnostic purposes can occur in 
foreign countries.  There can be no assurance that the Company 
would receive approval to export its products on a timely basis 
or at all, and the failure to obtain such approval could have a 
materially adverse effect on the Company's operations. 

Similar filings and governmental approvals will be required in 
certain major foreign countries before the Company's products can 
be marketed for diagnostic purposes in such countries.  There are 
numerous foreign regulatory bodies that regulate the sale of 
diagnostic products, and these bodies may be affected or 
influenced by criteria materially different than that of the FDA.  
The sale of the Company's products may be materially affected by 
the policies of these regulatory bodies or the domestic policies 
of the countries involved.  

Uncertainty of Type of, Timing or Receipt of FDA Approval. 

The form of requisite regulatory approval for a particular 
product in the U.S. is often uncertain and subject to changes in 
regulatory policy, changes in the interpretation of laws and 
regulations, or the enactment of new laws or the promulgation of 
new regulations, as well as the nature of and use of the 
particular product.  Additionally, the form of regulatory 
approval to be required by the FDA could be influenced by the 
form of approval sought by other diagnostic companies for similar 
or dissimilar tests.  While the Company has made determinations 
regarding the appropriate form or forms of approval that may be 
required for certain of its products, such determinations are 
continually reviewed and may change as a result of various 
factors, including changes in FDA policies, discussions with 
regulatory agencies or consultants and changes in product 
composition.  There can be no assurance that such determinations 
are correct, that the FDA will concur with such conclusions or 
that such determinations may not be altered due to new 
interpretations or new data that may become available.  

The clinical investigation required of the Company's products may 
take several months or several years to complete, depending on 
the nature of the FDA filing.  There can be no assurance that the 
FDA will act favorably or quickly in making its reviews, and 
significant difficulties or costs may be encountered by the 
Company in its efforts to obtain FDA approvals that could delay 
or preclude the Company from marketing its products for 
diagnostic purposes.  Furthermore, there can be no assurance that 
the FDA will not request the development of additional data 
following the original submission.  Based upon the data submitted 
to it, the FDA may also limit the scope of the labeling or 
permitted use of the product or deny the application altogether.  
With respect to patented products or technologies, delays imposed 
by the governmental approval process may materially reduce the 
period during which the Company will have the exclusive right to 
exploit those products or technologies.  There is no assurance 
that the Company will have sufficient resources to complete the 
required testing and regulatory review process or that it could 
survive the inability to obtain, or delays in obtaining, such 
approvals.  There can be no assurance that the necessary 
approvals 

                                 7



will be obtained by the Company or, if they are obtained, that 
they will be obtained on a timely basis.  Recently, because of 
the volume of applications, FDA application backlog and response 
times have been increasing.

The Company believes that any diagnostic HIV test will require a 
Pre-Market Approval ("PMA") filing with the FDA.  The regulatory 
approval, if ever, for a PMA submission could take two years or 
longer after filing.  However, the FDA may require the submission 
of a Product License Application ("PLA"), rather than a PMA, for 
approval to market as a diagnostic test.  If a PLA is required, 
the product's manufacturing facilities, systems and equipment 
must also be approved through an Establishment License 
Application ("ELA").  Should the Company be required to and 
succeed in obtaining a PLA and an ELA, substantially greater 
costs and delays will be incurred than if marketing approval were 
received under a PMA.  There is no assurance when or if such 
approvals would be granted or that the Company would or could 
undergo the commitment of time and resources to file a PLA and an 
ELA.

Based on recent publications from the FDA, the Company believes 
that the FDA will probably require submission of AproProbe as a 
PMA, but there can no assurances of this.  Also any regulatory 
approval for the use of AproProbe in conjunction with any 
enrichment systems developed by others would require a clinical 
investigation using the two products together.  

Other Government Regulations May Adversely Affect the 
Company.  

The Company's products could be affected by the Clinical 
Laboratory Improvement Amendments of 1988 ("CLIA"), which are 
intended to assure the quality and reliability of medical testing 
in the United States regardless of where tests are performed.  
CLIA or regulations thereunder could negatively affect the 
Company's ability to market its products.  Additionally, the 
Company is or may become subject to various federal, state and 
local laws and regulations, particularly those relating to the 
reporting of test results, safe working conditions, laboratory 
and manufacturing practices (e.g., including the FDA's Good 
Manufacturing Practices) and the use and disposal of hazardous or 
potentially hazardous substances, including infectious disease 
agents and radioactive compounds, used in connection with the 
Company's research and development work. Existing or future 
regulations may have an adverse effect on the Company's 
operations, and the extent of such regulations may increase.

General Uncertainty of Patent Protection .  

The success of the Company may depend on its ability or that of 
its licensors to establish, protect and enforce patent rights on 
its products and processes.  In general, however, the patent 
position of biotechnology firms is highly uncertain and involves 
complex legal, scientific and factual questions.  There can be no 
assurance that any patents will be granted with respect to the 
patent applications filed by or licensed to the Company.  
Furthermore, there can be no assurance that any patents issued or 
licensed to the Company will provide commercial benefit to the 
Company or will not be infringed, invalidated or circumvented by 
others.  The United States Patent and Trademark Office currently 
has a significant backlog of biotechnology patent applications, 
and the approval or rejection of patents may take several years.  
Prior to actual issuance, the contents of U.S. patent 
applications are generally not made public.  Once issued, such a 
patent would constitute prior art from its filing date, which 
might predate the date of a patent application on which the 
Company relies.  Conceivably, the issuance of such a patent, or 
the discovery of "prior art" of which the Company is currently 
unaware, could invalidate a patent of the Company or its licensor 
or prevent commercialization of a product disclosed therein.  
Even if patent protection is obtained, the Company or its 
licensor may not have the resources or ability to seek the 
enforcement of such foreign patents.

Uncertainty of International Patent Protection.  

The availability of patents in foreign markets, and the nature of 
any protection against competition that may be afforded by such 
patents, is often difficult to predict, and varies significantly 
from country to country.  Moreover, the Company or its licensor 
may choose not to seek, or may for any of various reasons be 
unable to obtain, patent protection in a country that might 
become an important market for the Company's products or 
technology.    

Possibility of Patent Infringement Claims Against the 
Company.  

The Company's products and processes may give rise to claims that 
they infringe the patents of others. The Company may not become 
aware of such patents until after it has made a substantial 
investment in the products or processes.  Such other persons, 
companies or institutions could bring legal actions against the 
Company or its commercial partners claiming damages and seeking 
an injunction that would prevent them, the Company or its 
partners from testing, manufacturing or marketing the affected 
product or process.  If such actions were successful, in addition 
to potential liability for damages, the Company or its commercial 
partners could be required to obtain a license in order to 
continue to test, manufacture or market the affected product or 
use the affected process.  There can be no assurance that any 
such required license would be made available or, if available, 
would be available on acceptable terms.  The Company expects that 
it may have to expend substantial resources in litigation, either 
in enforcing its patents, defending against the infringement 
claims of others or both.

                                8



Trade Secrets and Proprietary Know-How; No Assurance of 
Confidentiality.  

In addition to patent protection, the Company also relies on 
trade secrets, proprietary know-how and technological advances 
which it seeks to protect, in part, by confidentiality agreements 
with its collaborators, employees and consultants.  There can be 
no assurance that these agreements will not be breached, that the 
Company would have adequate remedies for any breach, or that the 
Company's trade secrets and proprietary know-how will not 
otherwise become known or be independently discovered by others.

Limited Manufacturing and Marketing Experience.  

To date, the Company has manufactured the limited quantity of its 
products required for its development and its limited sales 
activities.  There can be no assurance that manufacturing or 
quality control problems will not arise as the Company increases 
production of its products, begins significant commercialization 
or as additional facilities are required in the future.  
Additionally, the manufacturing and sale of any product will be 
dependent on adequate supplies and timeliness of delivery of raw 
materials or component parts of the product.  There can be no 
assurances as to the availability or cost of such materials at 
such times and in such quantities as required by the Company.  
The Company's dependence on others for the raw materials or 
component parts of its products may adversely affect the 
Company's profitability and its ability to manufacture such 
products on a timely basis.  The Company has no direct experience 
in marketing and distributing diagnostic products.  

Effect of Arrangements With Potential Collaborative 
Partners.  

The Company from time to time engages in discussions with 
diagnostic and other companies regarding collaborative 
arrangements for the expansion of applications of its technology 
or the license or joint venture of portions of such technology.  
Such arrangements, if consummated, may include joint research and 
development, product distribution, license or sale of the 
technology for specific applications or the issuance of equity or 
debt securities of the Company and may involve royalty 
arrangements. There can be no assurance that the Company will be 
successful in consummating any collaborative arrangement for its 
technology, nor can there be any assurance as to the timing or 
terms of any such agreements.

Such collaborative arrangements, if entered into, may provide for 
the Company to receive a royalty for sales of its products by the 
licensee.  Such royalties will depend in part upon the efforts 
required of the licensee, which may include the completion of 
product research and development, performance of clinical 
investigations, obtaining regulatory approvals and manufacturing 
and marketing any products.  The amount and timing of resources 
devoted to these activities will be controlled by the licensee.  
Should the licensee fail to perform any required functions, the 
Company's business and results could be adversely affected.  In 
addition, there can be no assurance that any of the Company's 
collaborative partners would not pursue alternative technologies 
or develop alternative products on their own or in collaboration 
with others, including the Company's competitors. 

Potential Adverse Effect of Technological Change and 
Competition.  

The diagnostic and biotechnology industries are subject to 
intense competition and rapid and significant technological 
change.  Competitors of the Company in the United States and 
abroad are numerous and include, among others, diagnostic, 
biotechnology and chemical companies, academic institutions, 
governmental agencies and other public and private research 
organizations. Many of these competitors have substantially 
greater financial and technical resources and production and 
marketing capabilities than the Company.  There can be no 
assurance that these competitors will not succeed in developing 
technologies and products that are more effective, easier to use 
or less expensive than those which are being developed by the 
Company or that would render the Company's technology and 
products obsolete and noncompetitive.  In addition, many of the 
Company's competitors have significantly greater experience than 
the Company in conducting clinical investigations of new 
diagnostic products and in obtaining FDA and other regulatory 
approvals of products for use in health care.  Accordingly, the 
Company's competitors may succeed in obtaining regulatory 
approval for products more rapidly than the Company.  

The Company is aware that other companies have developed or may 
be developing probe test systems which may be competitive with 
the Company's products.  The existence of any competing products 
or procedures that may be developed in the future may adversely 
affect the marketability of products developed by the Company.  
The Company is aware of at least two companies that are marketing 
assays to measure the amount of HIV virus in plasma, rather than 
in intact cells.  Substantial research has been devoted to the 
correlation between such measures and the effect of therapy or 
the progress of the disease, and both products have been filed 
with the FDA.  The Company's HIV product will face competition 
from such assays and such research or regulatory approval for 
other products may limit the market acceptance of the Company's 
products.  Also, several competitors have announced efforts to 
develop a prenatal genetic testing product using maternal blood.  
Additionally, the Company is aware that several other competitors 
are currently marketing probe-based tests utilizing in situ 
hybridization, some of which are in various phases of the 
regulatory approval process.  The Company believes that its 
products based on the Company's technology will have advantages 
over those announced by its competitors; there can be no 
assurance, however, that this will be the case.  

                                 9



In addition, many companies and institutions are attempting to 
identify sequences of genes.  In some cases, including the 
discovery of whole genes, patent protection for such sequences 
has been granted.  Increasingly, patent applications are being 
filed with respect to sequences for which no gene has been 
identified.  Continuation of this process of patenting genes and 
sequences could, to the extent that desired gene targets for the 
Company's DNA probes are patented by others, foreclose the 
Company from developing probes for such targets or require the 
Company to pay license fees in order to market probes for such 
targets.  

Potential Adverse Effect of Automation Trends.  

The medical diagnostics industry has experienced a trend toward 
the automation of testing procedures that may have an impact on 
the Company's competitive position.  The Company's ability to 
develop and market its tests may be limited by the availability, 
cost and characteristics of generally available automated 
instrumentation.  Competitive pressures have begun to require 
diagnostic companies to provide automated equipment to each 
laboratory, physician's office or other customer and to generate 
sales through such customers' use of those companies' products in 
conducting the tests.  The Company currently does not have the 
financial resources to purchase and provide such instrumentation 
to its customers.  The Company may, therefore, be unable to 
compete effectively with diagnostics companies that either 
manufacture their own automated equipment or that have the 
capital resources to purchase such equipment.  Additionally, as 
the trend towards automation continues, the Company will likely 
be required to either design its tests so as to be formatted for 
use with instrumentation that is then generally available from 
manufacturers or enter into arrangements for the manufacture of 
instrumentation specifically designed for use with the Company's 
diagnostics.  Additionally, the Company may not have the 
financial resources to obtain such specially made instrumentation 
and will be at a competitive disadvantage to those diagnostic 
companies that manufacture such instrumentation or have the 
capital resources to purchase such instrumentation.  The 
Company's HIV tests are formatted for analysis using a flow 
cytometer, and potential customers may not own or have access to 
such instrumentation, limiting the market acceptance of the 
Company's products.

Use of Hazardous Materials.  

Employees of the Company dealing with human blood and tissue 
specimens may be exposed to risks of infection from HIV, 
hepatitis and other blood and specimen-borne diseases if 
appropriate laboratory practices are not followed.  There can be 
no assurance that such infections will not occur in the future or 
result in liability to the Company.  The Company's research and 
development involves the controlled use of hazardous materials 
and chemicals, and the Company's products includes reagents that 
are known carcinogens.  Accidental contamination or injury from 
these materials could result in a material adverse effect on the 
Company.  The Company may also incur substantial costs to comply 
with environmental regulations.  

Possibility of Product Liability Claims.  

The testing, marketing, manufacturing and sale of health care 
products could expose the Company to the risk of product 
liability claims.  A product liability claim could have a 
material adverse effect on the business or financial condition of 
the Company.  The Company currently maintains limited amounts of 
product liability insurance coverage, but there can be no 
assurance that product liability insurance will be available to 
the Company in the future on acceptable terms, if at all.  There 
can be no assurance that product liability insurance will prove 
adequate or that a product liability claim, insured or uninsured, 
would not have a material adverse effect on the Company.  Even if 
a product liability claim is not successful, the time and expense 
of defending against such a claim may adversely affect the 
Company.

Uncertainty of Health Care Reform and Reimbursement By 
Third-Party Payors for Products.  

Cost control measures adopted by Medicare, Medicaid and private 
health insurance plans and other third-party payers in recent 
years have had and may continue to have a significant effect on 
the purchasing practices of many health care providers, generally 
causing them to be more selective in the purchase of medical 
products and performance of diagnostic services and treatments.  
Third-party payers may deny reimbursement in some cases.  As a 
result of, among other things, the changing health care 
environment, significant uncertainty exists as to the 
reimbursement status of newly approved health care products, 
diagnostic services and treatments.  Failure by future users of 
the Company's products to obtain reimbursement from payers, 
together with current and future changes in third-party payer 
reimbursement practices regarding the diagnostic services and 
treatments performed with such products, may adversely affect the 
Company's business, financial condition, results of operations 
and access to future capital.

In 1994, Congress considered a series of legislative and 
regulatory proposals aimed at reforming the U.S. health care 
system.  Although these proposals were not enacted, Congress may 
consider new health care reform proposals in the future.  While 
the Company cannot predict whether any such legislative or 
regulatory proposals will be considered or adopted or the effect 
such proposals may have on its business, the uncertainty of such 
proposals could have a material adverse effect on the Company's 
ability to raise capital and to identify and reach agreements 
with potential partners, and the adoption of such proposals could 
have a material adverse effect on the Company.  Furthermore, the 
Company's ability to commercialize its potential product 
portfolio may be adversely affected to the extent that such 
proposals have a material adverse effect on the business, 
financial condition and profitability of other companies that are 
current or prospective collaborators for certain of the Company's 
proposed products.

                                 10



Dependency on Key Personnel.  

The Company's ability to successfully develop marketable products 
and to maintain a competitive position will depend in large part 
on its ability to attract and retain highly qualified scientific 
and management personnel and to develop and maintain 
relationships with leading research institutions and consultants.  
The Company is highly dependent upon the principal members of its 
management, the loss of any of whom could have a material adverse 
effect on the Company.  The Company's Chief Executive Officer is 
currently engaged on a part-time basis as a consultant, and such 
arrangement may be terminated by either party after June 30, 
1996.  The remaining members of management are not parties to 
employment agreements with the Company.

Certain Anti-Takeover Effects.  

The Company's Restated Certificate Incorporation and Bylaws 
include certain provisions that may be deemed to have anti-
takeover effects.  The Board of Directors of the Company is 
empowered, without approval of the stockholders other than 
certain approvals of holders of the Series A Convertible 
Preferred Stock, to cause shares of undesignated Preferred Stock 
to be issued in one or more series, with the numbers of shares of 
each series and the rights, preferences and limitations of each 
series to be determined by it.  Such issuance of shares of 
undesignated Preferred Stock, or the issuance of rights to 
purchase such shares, could adversely affect the voting power of 
the Common Stock or Series A Convertible Preferred Stock, 
discourage an unsolicited acquisition proposal or make it more 
difficult for a third party to gain control of the Company.  The 
Company's Bylaws establish advance notice procedures with regard 
to the nomination, other than by or at the direction of the Board 
of Directors, of candidates for election as directors and with 
regard to certain matters to be brought before an annual meeting 
of stockholders of the Company. The Company is subject to Section 
203 of the Delaware General Corporation Law which could have the 
effect of delaying, deferring or preventing a change in control 
of the Company or the removal of existing management or deterring 
potential acquirors from making an offer to stockholders of the 
Company, notwithstanding that a majority of the stockholders 
might benefit from such a change in control or offer.

Possible Control by Existing Stockholders.  

Current executive officers and directors of the Company or their 
affiliates beneficially own securities, including Convertible 
Notes, with approximately 28% of the voting power of all the 
Company's voting securities if the Convertible Notes were 
converted into Common Stock.  As a result, these stockholders 
will, to the extent they act together, have the ability to exert 
significant influence or control over matters requiring the 
approval of the Company's stockholders, including possibly the 
election of a majority of the Company's Board of Directors.

Volatility of Common Stock Price and Thin Trading Market.  

Although the Common Stock is listed on the American Stock 
Exchange, recently daily trading volume of the Common Stock has 
generally been limited.  The market prices for securities of 
diagnostic or biotechnology companies have historically been 
highly volatile, and recently a number of biotechnology 
companies' stock prices have decreased sharply following 
announcement of disappointing clinical trials.  The trading price 
of the Common Stock has experienced considerable fluctuation 
since the Company's initial public offering in 1993 and is 
extremely sensitive to large volume trades.  Announcements of or 
changes in product development timelines, technological 
innovations or new products by the Company or its competitors, 
developments concerning proprietary rights, including patents and 
litigation matters, publicity regarding actual or potential 
results with respect to products under development by the Company 
or others, regulatory and health care reform developments in both 
the United States and foreign countries and public concern as to 
the safety of new technologies and other factors, may have a 
significant impact on the market price of the Common Stock. 

Listing on the American Stock Exchange.  

The Company is currently not in compliance with certain minimum 
requirements for continued listing of the Common Stock on the 
American Stock Exchange.  To date, to the Company's knowledge, 
the AMEX has taken no affirmative action to delist the Common 
Stock, but has reserved the right to do so in the future.  If the 
Common Stock is delisted from the AMEX, there would likely be a 
material adverse effect on the marketability of the Common Stock.  
There can be no assurance that the Company could qualify for 
listing of the Common Stock on any other exchange, or qualify to 
have shares of the Common Stock quoted through the National 
Association of Securities Dealers, Inc. Automated Quotation/ 
National Market System or any other interdealer quotation system.  
Failure to retain AMEX-listed status could adversely affect the 
exemption of resales of shares of Common Stock under certain 
state securities or "blue sky" laws, impeding free 
transferability of such shares.  In addition, the Company's 
ability to raise additional equity would be negatively impacted 
in the event the AMEX were to delist the Common Stock.

Effect of Shares Eligible for Future Sale on Market Price 
and Liquidity.  

The ability of purchasers of the Common Stock offered by this 
Prospectus to resell any Common stock acquired, or the price 
received upon such resale, may be adversely affected by the 
shares of Common Stock currently eligible for sale or may become 
eligible for sale in the future.  

                                 11



Substantially all of the outstanding Common Stock and any Common 
Stock issuable upon conversion of the Series A Preferred Stock 
and related placement agent warrants are eligible for sale either 
as a result of registration or pursuant to Rule 144 of the 
Securities Act of 1933 (the "Securities Act").  The sale of such 
shares in the open market by existing stockholders under Rule 144 
or otherwise or through the exercise of warrants, outstanding 
vested options, registration rights or otherwise could adversely 
affect the market price of the Common Stock and may have a 
material adverse effect on the Company's ability to raise the 
capital necessary to fund its future operations.  

The Company has also granted registration rights to certain 
stockholders of the Company prior to its initial public offering, 
certain warrantholders, and the recipient of Common Stock issued 
in an acquisition.  These registration rights generally require 
the Company to file one or more registration statements at its 
expense upon demand or to include such holders' shares in any 
registration statement filed by the Company.  Registration of 
shares under the Securities Act would result in such shares 
becoming freely tradable without the restriction under the 
Securities Act (except for shares purchased by affiliates of the 
Company) immediately upon the effectiveness of such registration.  
The Company may grant additional registration rights if it issues 
securities in the future.

Shares purchasable upon conversion of the Convertible Notes are 
registered under the Registration Statement of which this 
prospectus is a part.


                FORWARD-LOOKING STATEMENTS

The statements contained in this document regarding future cash 
uses and requirements, expected expenditure levels, business and 
product development or strategy and other statements which are 
not historical facts are forward-looking statements that involve 
risks and uncertainties.  The words "expect," "project," 
"estimate," "predict," "anticipate," "believes" and similar 
expressions are also intended to identify forward-looking 
statements.  While various factors will influence the outcome of 
these forward-looking statements, the principal factors, among 
others, that will affect the Company include the progress or 
results of the Company's development activities, including any 
need for additional capital equipment, personnel or consultants 
or revisions to product development activities that may arise 
from interim results of such activities; competition in the 
marketplace, including the various factors that may affect sales 
of the Company's research products or the need to alter research 
plans or development activities to respond to competition or 
technological changes; the terms and results of collaborative 
relationships with others; retention of key personnel and the 
need to expend resources to replace such individuals; any 
litigation that may arise; and the need to expend resources on 
seeking additional financing.  

Additional factors to consider in assessing the risks and 
uncertainties of such forward-looking statements include, but are 
not limited to, those relating to: the Company's products being 
in the early stage of development; uncertainty of developing 
markets; the need for additional financing and limited access to 
capital funding; the Company's limited operating history; its 
accumulated deficit and anticipated losses; government regulation 
(including that the Company's products are subject to extensive 
regulation and required government approvals, that there is no 
assurance of regulatory approvals and that failure to obtain such 
approvals will have an adverse effect; uncertainty of the type 
of, timing or receipt of FDA approval; that the Company will be 
subject to numerous international regulations and that other 
regulations may adversely affect the Company); the Company's 
reliance on distributors and collaborative partners; license 
patents and trade secrets (including the uncertainty of domestic 
and international patent protection, the possibility of patent 
infringement claims against the Company, the Company's reliance 
on trade secrets and proprietary know-how and that there is no 
assurance of confidentiality); the potential adverse effects of 
technological change and competition; potential of limited third-
party reimbursement; use of hazardous materials; possibility of 
product liability claims; dependence on key personnel; limited 
manufacturing and marketing experience; uncertainty relating to 
health care reform measures; and other risks and uncertainties 
described in this prospectus (including specifically those 
described in "Risk Factors") and other factors detailed in the 
Company's other Securities and Exchange Commission filings. 


                     USE OF PROCEEDS

The Company will not receive any part of the proceeds from any 
sale of the Shares by the Selling Stockholders.


            DESCRIPTION OF CONVERTIBLE NOTES

On June 12, 1996, the Company issued $2,005,000 principal amount 
of Notes due on May 29, 1998.  The Notes bear interest at the 
rate of 10% per annum, based on a 365 day year, compounded 
quarterly.  Interest is payable at maturity or upon prepayment.  

                                12



The Notes are convertible into Common Stock at the option of the 
holder at any time after the earlier of (i) the approval for 
listing by the American Stock Exchange (the "AMEX") of the Common 
Stock issuable upon conversion of the Notes, or (ii) if the 
Common Stock of the Company ceases to be listed for trading on 
the AMEX, on the day of such de-listing.  However, the Notes may 
not be converted after the close of business on the fifth 
business day prior to either the scheduled maturity or any 
scheduled redemption.  

The Notes are convertible into Common Stock at a rate of one 
share of Common Sock for every $1.10 in principal and accrued 
interest (the "Conversion Price").  Accordingly, the Notes are 
initially convertible into a total of 1,822,727 shares of Common 
Stock, but such number of shares will increase as a result of 
accrued interest on the Notes and may be further adjusted by 
changes in the Conversion Price as set forth herein.  All or part 
of the principal amount of the Notes may be converted at the 
election of the holder, but accrued interest applicable to the 
converted principal amount will also be converted into Common 
Stock.

On the twentieth business day prior to the maturity date of the 
Notes (the "Reset Date"), the Conversion Price will be adjusted 
to the average of the closing price of the Common Stock on the 
AMEX (or such other trading forum as may be applicable at that 
time) for the ten trading days prior to the Reset Date (the 
"Reset Conversion Price") if and only if such new Reset 
Conversion Price is lower than the then-current Conversion Price.  
However, such price shall not be less than 50% of the then-
Conversion Price.

The Notes contain provisions to protect the holders against 
dilution by adjusting the number of shares issuable upon 
conversion thereof upon the occurrence of certain events, 
including payment of stock dividends and distributions, stock 
splits, recapitalizations, reclassifications and reorganizations.

The Company has the right to prepay principal and accrued 
interest upon twenty days notice to the holders of the Notes.  
However, the holders have the right to convert the Notes into 
Common Stock as set forth above prior to such redemption.

The principal and accrued interest of the Notes become 
immediately due and payable upon the insolvency of the Company, 
the commission of any act of bankruptcy by the Company, the 
execution by the Company of a general assignment for the benefit 
of creditors, the filing by or against the Company of any 
petition in bankruptcy or any petition for relief under the 
provisions of the federal bankruptcy act or any other state or 
federal law for the relief of debtors and the continuation of 
such petition without dismissal for a period of thirty days or 
more, or the appointment of a receiver or trustee to take 
possession of the property or assets of the Company. 


              DESCRIPTION OF CAPITAL STOCK

Under the Company's Restated Certificate of Incorporation, as 
amended, the authorized capital stock of the Company is 
31,200,000 shares, of which 20,000,000 shares are Common Stock, 
par value $.001 per share, and 11,200,000 shares are preferred 
stock, par value $.001 per share ("Preferred Stock").  As of June 
30, 1996, the Company had outstanding 5,200,598 shares of Common 
Stock and 449,000 shares of Preferred Stock, all of which were 
designated as Series A Convertible Preferred Stock.  As of June 
30, 1996, stock options for an aggregate of 396,309 shares and 
warrants to purchase an additional aggregate of 577,809 shares of 
Common Stock and 45,900 shares of Series A Convertible Preferred 
Stock were outstanding.  Additionally, the Series A Convertible 
Preferred Stock is convertible into 2,236,020 shares of Common 
Stock, and the Convertible Notes are currently convertible into 
1,822,727 shares of Common Stock (excluding any shares issuable 
upon conversion of accrued interest related to the principal 
balance of the Convertible Note so converted).

Common Stock

Holders of Common Stock are entitled to one vote per share with 
respect to all matters required by law to be submitted to 
stockholders of the Company. As described below, the holders of 
Common Stock and the Series A Convertible Preferred Stock 
together as a class will have the sole right to vote, except as 
otherwise provided by law or by the Company's Restated 
Certificate of Incorporation (including provisions for which the 
Series A Convertible Preferred Stock has a class vote and 
provisions governing subsequently created series of Preferred 
Stock).  The Common Stock has no cumulative voting rights.  
Accordingly, holders of shares with the majority of the voting 
power of all shares entitled to vote in any election of directors 
may elect all of the directors standing for election.  See 
"Series A Convertible Preferred Stock_Voting Rights."

Subject to the prior rights of holders of Series A Convertible 
Preferred Stock (and other series, if any, of Preferred Stock), 
holders of the Common Stock are entitled to receive such 
dividends as may be lawfully declared by the Board 

                                13



of Directors of the Company.  Upon any dissolution, liquidation 
or winding up of the Company, whether voluntary or involuntary, 
holders of the Common Stock are entitled to share ratably in all 
assets remaining after the liquidation payments have been made on 
all outstanding shares of Series A Convertible Preferred Stock 
and other series, if any, of Preferred Stock.  See "Series A 
Convertible Preferred Stock_Dividends and "_Liquidation 
Rights."

The Common Stock does not have any preemptive, subscription or 
conversion rights.

Series A Convertible Preferred Stock

The Series A Convertible Preferred Stock is a series of Preferred 
Stock consisting of up to 880,000 shares.  As of June 30, 1996, 
449,000 of these shares were issued and outstanding and 45,900 
shares were reserved for issuance upon exercise of the Placement 
Agent Warrants.  The following summary description of the Series 
A Convertible Preferred Stock is qualified in its entirety by 
reference to the Certificate of Designations governing the Series 
A Convertible Preferred Stock.

       Dividends

The holders of shares of Series A Convertible Preferred Stock are 
entitled to receive dividends and distributions, when, as and if 
declared by the Board of Directors.  If the Company declares a 
dividend or distribution on the Common Stock, the Company will 
declare and pay a dividend or distribution on the Series A 
Preferred Stock in the amount of the dividend or distribution on 
the number of shares of Common Stock into which each share of 
Series A Convertible Preferred Stock would be convertible on the 
record date for such dividend or distribution.  If the Company 
declares a dividend or distribution on any other class or series 
of Preferred Stock, the Series A Convertible Preferred Stock will 
be entitled to a dividend or distribution in an amount in 
proportion to the dividend or distribution declared on such other 
class or series based upon the liquidation preference of the 
Series A Convertible Preferred Stock relative to that of such 
other class or series, unless the holders of at least 66% of the 
outstanding shares of Series A Convertible Preferred Stock 
consent otherwise.  In any such case, the Company will establish 
the same record date for the dividend or distribution on the 
Series A Convertible Preferred Stock as is established for such 
dividend or distribution on the Common Stock or such other class 
or series of Preferred Stock.  The consent of the holders of at 
least 66% of the outstanding shares of Series A Convertible 
Preferred Stock is required for certain matters relating to 
payment of dividends or distributions on other classes and series 
of stock and the creation of other classes or series of Preferred 
Stock.  See "_Voting Rights."

       Liquidation Rights

In the event of (i) a liquidation, dissolution or winding up of 
the Company, whether voluntary or involuntary or (ii) a sale or 
other disposition of all or substantially all of the assets of 
the Company, after payment or provision for payment of debts and 
other liabilities of the Company, the holders of Series A 
Convertible Preferred Stock will be entitled to receive the 
liquidation preference of $13.00 per share before any payment or 
distribution is made to the holders of Common Stock or any other 
class or series of the Company's capital stock ranking junior as 
to rights upon liquidation to the Series A Convertible Preferred 
Stock, but the holders of Series A Convertible Preferred Stock 
will not be entitled to receive the liquidation preference of 
such stock until the liquidation preference of any of the 
Company's other class or series of capital stock which may 
hereafter be created ranking senior as to rights upon liquidation 
to the Series A Convertible Preferred Stock ("Senior Liquidation 
Stock") has been paid in full.  The ability of the Company to 
authorize or issue Senior Liquidation Stock is limited as set 
forth below under "Voting Rights." The holders of Series A 
Convertible Preferred Stock and all classes or series of stock 
that rank on a parity as to liquidation rights with the Series A 
Convertible Preferred Stock will be entitled to share ratably, in 
accordance with the respective preferential amounts payable on 
such stock, in any distribution (after payment of the liquidation 
preference of any Senior Liquidation Stock) which is not 
sufficient to pay in full the aggregate of the amounts payable 
thereon.  After payment in full of the liquidation preference of 
the shares of the Series A Convertible Preferred Stock, the 
holders of such shares will not be entitled to any further 
participation in any distribution of assets by the Company.  A 
consolidation or merger of the Company with or into another 
corporation will not be considered a liquidation, dissolution, 
winding-up or sale of substantially all assets of the Company.

       Voting Rights

Except as described below or otherwise provided by law, the 
holders of shares of Series A Convertible Preferred Stock, the 
holders of shares of Common Stock and the holders of any other 
class of series of stock entitled to vote with the Common Stock 
will vote together as one class on all matters submitted to a 
vote of stockholders of the Company.  In any such vote, each 
share of Series A Convertible Preferred Stock will entitle the 
holder thereof to cast the number of votes equal to the number of 
votes which could be cast in such vote by a holder of the Common 
Stock into which such share of Series A Convertible Preferred 
Stock is convertible on the record date for such vote, 

                               14



or, if no record date has been established, on the date such vote 
is taken.  Any shares of Series A Convertible Preferred Stock 
held by the Company or any entity controlled by the Company will 
not have voting rights and will not be counted in determining the 
presence of a quorum.

In addition, so long as more than 50% of the shares of Series A 
Convertible Preferred Stock issued in the initial offering 
thereof or issuable upon exercise of the Placement Agent Warrants 
are outstanding, the Company may not, without the affirmative 
vote or consent of the holders of at least 66% of all outstanding 
shares of Series A Convertible Preferred Stock, voting separately 
as a class, (i) amend, alter or repeal any provision of the 
Amended and Restated Certificate of Incorporation, as amended 
(including the Certificate of Designations relating to the 
Series A Convertible Preferred Stock) or the bylaws of the 
Company so as adversely to affect the relative rights, 
preferences, qualifications, limitations or restrictions of the 
Series A Convertible Preferred Stock, (ii) until May 25, 1998, 
declare any dividend or distribution on the Common Stock or any 
other class or series of Preferred Stock or (iii) authorize or 
issue, or increase the authorized amount of any additional class 
or series of stock or any security convertible into stock of such 
class or series, (A) ranking prior to, or on a parity with, the 
Series A Convertible Preferred Stock upon liquidation, 
dissolution or winding up of the Company or a sale of all or 
substantially all assets of the Company, or (B) providing for the 
payment of any dividend or distribution other than (1) a dividend 
or distribution that is payable on the Common Stock or is payable 
to a holder of such class or series in the event a dividend or 
distribution is declared on the Common Stock or is payable to a 
holder of such class or series in the event a dividend or 
distribution is declared on the Common Stock in the amount of the 
dividend or distribution that would be received by a holder of 
the number of shares of Common Stock into which a share of such 
class or series would be convertible on the record date for such 
dividend or distribution and (2) a dividend or distribution 
payable on a class or series of Preferred Stock as a result of a 
payment of a dividend or distribution being declared on another 
class or series of Preferred Stock in an amount per share for the 
first class or series based upon the first class or series' 
liquidation preference relative to that of such other class or 
series of Preferred Stock.  A class vote on the part of the 
Series A Convertible Preferred Stock shall, without limitation, 
specifically not be deemed to be required (except as otherwise 
required by law or resolution of the Company's Board of 
Directors) in connection with: (a) the authorization, issuance or 
increase in the authorized amount of Common Stock or of any 
shares of any other class or series of stock (x) ranking junior 
to the Series A Convertible Preferred Stock in respect of 
distributions upon liquidation, dissolution or winding up of the 
Company or (y) described in clause (iii)(B)(1) or (2) above; 
(b) the authorization, issuance or increase in the amount of the 
Series A Convertible Preferred Stock or any bonds, mortgages, 
debentures or other obligations of the Company (other than bonds, 
mortgages, debentures or other obligations convertible into or 
exchangeable for or having option rights to purchase any shares 
of stock of the Company the authorization, issuance or increase 
in amount of which would require the consent of the holders of 
the Series A Convertible Preferred Stock); or (c) any 
consolidation or merger of the Company with or into another 
corporation, a sale or transfer of all or part of the Company's 
assets for cash, securities or other property, or a compulsory 
share exchange.

       Conversion Rights

The holder of any shares of Series A Convertible Preferred Stock 
has the right, at the holder's option, to convert any or all such 
shares into Common Stock.  The shares of Series A Convertible 
Preferred Stock are convertible at a rate of 4.98 shares of 
Common Stock per share of Series A Convertible Preferred Stock 
($2.01 per share of Common Stock), subject to certain anti-
dilution adjustments.  Such conversion rate and conversion price 
include the effect of certain anti-dilution provisions related to 
the sale of the Convertible Notes and 1996 Warrants.

The conversion rate per share of Common Stock is subject to 
further adjustment in certain other events, including:  the 
issuance of stock as a dividend on the Common Stock; subdivisions 
or combinations of the Common Stock; the reclassification of the 
Common Stock; the issuance to all or substantially all holders of 
Common Stock of rights, options, warrants or convertible 
securities entitling such holders to subscribe for or purchase 
Common Stock at a price per share which is lower than the then 
current market price of the Common Stock; or the distribution to 
all or substantially all holders of Common Stock of evidences of 
indebtedness or assets (excluding cash dividends paid out of 
earnings) or rights, options, warrants or convertible securities 
containing the right to subscribe for or purchase Common Stock 
(other than those referred to above); or the sale or issuance of 
bonds, mortgages, debentures or other debt obligations 
convertible into or exchangeable for, or having attached or 
detachable rights or warrants to purchase, Common Stock at a 
price per share lower than the then current market price of the 
Common Stock.  No adjustment in the conversion rate will be 
required to be made until cumulative adjustments amount to 1% or 
more of the conversion rate as last adjusted; however, any 
adjustment not made will be carried forward.

If the Company enters into any consolidation, merger, combination 
or other transaction in which shares of Common Stock constituting 
in excess of 50% of the voting power of the Company are exchanged 
for or changed into other stock or securities, cash and/or any 
other property (a "Merger Transaction"), then in any such case 
the shares of Series A Convertible Preferred Stock will at the 
same time be similarly exchanged or changed in an amount per 

                                15



share equal to (x) the conversion rate in effect at such time 
multiplied by (y) the aggregate fair market value, as determined 
in good faith by the Board of Directors of the Company, of stock, 
securities, cash and/or any other property (payable in kind), as 
the case may be, into which or for which each share of Common 
Stock is changed or exchanged (the "Per Share Merger 
Consideration").

       Mandatory Conversion

At any time, the Company, at its option, may cause the Series A 
Convertible Preferred Stock to be converted in whole, but not in 
part, into shares of Common Stock at the conversion price in 
effect at that time if the closing price of the Common Stock has 
exceeded 150% of the then applicable conversion price for at 
least 20 trading days in any 30 consecutive trading day period.

       Registration Rights

The Company has filed with the Securities and Exchange Commission 
a Registration Statement to register the resale of the Common 
Stock issuable upon conversion of the Series A Convertible 
Preferred Stock.  

       Other Provisions

The holders of shares of Series A Convertible Preferred Stock 
have no preemptive rights with respect to any securities of the 
Company.

Other Preferred Stock

The Board of Directors of the Company is empowered, without 
approval of the stockholders other than certain approvals of 
holders of the Series A Convertible Preferred Stock as described 
above, to cause shares of undesignated Preferred Stock to be 
issued in one or more series, with the numbers of shares of each 
series and the rights, preferences and limitations of each series 
to be determined by it.  Among the specific matters that may be 
determined by the Board of Directors are the rate of dividends, 
the redemption price, the terms of a sinking fund, the amount 
payable in the event of any voluntary liquidation, dissolution or 
winding up of the affairs of the Company, conversion rights and 
voting powers.

The issuance of shares of undesignated Preferred Stock, or the 
issuance of rights to purchase such shares, could adversely 
affect the voting power of the Common Stock or Series A 
Convertible Preferred Stock, discourage an unsolicited 
acquisition proposal or make it more difficult for a third party 
to gain control of the Company.  For instance, the issuance of a 
series of undesignated Preferred Stock might impede a business 
combination by including class voting rights that would enable 
the holder to block such a transaction, or facilitate a business 
combination by including voting rights that would provide a 
required percentage vote of the stockholders. Although the Board 
of Directors is required to make any determination to issue such 
stock based on its judgment as to the best interests of the 
stockholders of the Company, the Board of Directors could act in 
a manner that would discourage an acquisition attempt or other 
transaction that some, or a majority, of the stockholders might 
believe to be in their best interests or in which stockholders 
might receive a premium for their stock over the then market 
price of such stock.  The Board of Directors does not at present 
intend to seek stockholder approval prior to any issuance of 
currently authorized stock, unless otherwise required by law.

Options and Warrants

As of June 30, 1996, the Company had 523,407 shares of Common 
Stock reserved for issuance under its 1990 Stock Option Plan, and 
options to purchase 345,109 shares of Common Stock thereunder 
have been granted and are outstanding.  As of June 30, 1996, the 
Company had 100,000 shares of Common Stock reserved for issuance 
under its Directors Stock Option Plan, and options to purchase 
51,200 shares of Common Stock thereunder have been granted and 
are outstanding.  On July 12, 1996, amendments to the Directors 
Stock Option Plan were approved by stockholders, and the number 
of shares authorized for issuance under the plan increased to 
150,000.  Options to acquire an additional 40,000 shares of 
Common Stock were granted on July 12, 1996 with an exercise price 
of $1.1875 per share, increasing the number of shares of Common 
Stock that may be purchased under granted options to 91,200 
shares.  Additionally, as of June 30, 1996, the Company had 
577,809 shares of Common Stock reserved for issuance of various 
warrants,  including warrants to purchase 130,323 shares issued 
in conjunction with the Convertible Notes (the "1996 
Warrants").  

                            16



       Principal Terms of the 1996 Warrants
Warrants to acquire 130,323 shares of Common Stock were issued in 
conjunction with the Convertible Notes, or warrants for 
approximately 6,500 shares for every $100,000 of principal.
The 1996 Warrants entitle the holders thereof to purchase Common 
Stock at $1.10 per share and are exercisable at any time after 
the earlier of (i) the approval for listing by the American Stock 
Exchange (the "AMEX") of the Common Stock issuable upon exercise 
of the warrants, or (ii) if the Common Stock of the Company 
ceases to be listed for trading on the AMEX, on the day of such 
de-listing, but such exercise must occur prior to the close of 
business on May 28, 1999.  The 1996 Warrants contain provisions 
to protect the holders thereof against dilution by adjusting the 
price at which the 1996 Warrants are exercisable and the number 
of shares issuable upon exercise thereof upon the occurrence of 
certain events, including the payment of stock dividends and 
distributions, stock splits, recapitalizations, reclassifications 
and reorganizations.  Commencing September 10, 1996, the holders 
of the 1996 Warrants will have "piggyback" registration rights to 
require the Company to include the Common Stock underlying such 
warrants in certain registration statements filed by the Company.
        Other Warrants 

In connection with various capital lease obligations, the Company 
has issued warrants that allow the holder to purchase an 
aggregate of 10,665 shares of Common Stock at $2.881 per share 
and 15,951 shares at $7.24 per share (the "Capital Lease 
Warrants").  Warrants for 10,665 shares expire upon the earlier 
of March 27, 2000 or the occurrence of certain specified events.  
Warrants for 15,951 shares expire on June 30, 1999.  In May 1993, 
the Company issued to certain then-existing investors a bridge 
loan in an aggregate dollar amount of $600,000 and warrants to 
purchase an aggregate of 144,586 shares of Common Stock (the 
"Bridge Loan Warrants").  These warrants are exercisable at $5.67 
per share.  These warrants expire on October 22, 1998.  In 
connection with the Company's initial public offering, the 
Company sold to H. J. Meyers & Co., Inc., the representative of 
the underwriters in such offering (the "IPO Representative"), at 
an aggregate cost of $100, warrants (the "Representative's 
Warrants") to purchase from the Company up to 147,424 shares of 
Common Stock at an exercise price per share equal to $8.01.  The 
Representative's Warrants are exercisable for a period of four 
years beginning October 15, 1994.  The Representative's Warrants 
allow for exercise, with the Company's consent, on a "net 
exercise" basis.  In connection with the acquisition of the 
assets of the research program of MediGene, the Company issued 
warrants to purchase 100,000 shares of Common Stock (the 
"MediGeneWarrants").  The MediGene Warrants are exercisable until 
April 15, 1998 at an exercise price of $16 per share.  These 
warrants may be exercised on a "net exercise" basis that does not 
require the payment of any cash to the Company.  Pursuant to the 
sale of units of Common Stock and warrants (the "May 1995 
Warrants") in May, 1995, the Company issued the May 1995 
Warrants, exercisable for 28,860 shares of Common Stock.  The May 
1995 Warrants are exercisable at prices ranging from $7.25 (for 
warrants to acquire 18,060 shares of Common Stock) to $3.00 (for 
warrants to acquire 10,000 shares of Common Stock), and all of 
such warrants expire on March 31, 1997.  In June, 1996, in 
connection with the sale of the Convertible Notes, the Company 
issued the 1996 Warrants to acquire 130,323 shares of Common 
Stock.  The 1996 Warrants are exercisable at $1.10 per share of 
Common Stock and expire on May 28, 1999.  All of the warrants 
contain provisions to protect the holders thereof against 
dilution by adjusting the price at which the warrants are 
exercisable and the number of shares issuable upon exercise 
thereof upon the occurrence of certain events, including payment 
of stock dividends and distributions, stock splits, 
recapitalizations, reclassifications and reorganizations and, in 
the case of the Capital Lease Warrant for 15,951 shares, Bridge 
Loan Warrants and the Representatives Warrants, issuances of 
Common Stock at below the then current market price.  The holders 
of the warrants (other than the MediGene Warrants) and any shares 
of stock issued upon exercise thereof have certain rights to 
register the Common Stock underlying such warrants.  A holder of 
warrants has no rights as a stockholder of the Company until the 
warrants are exercised.

In connection with the sale of the Series A Convertible Preferred 
Stock, the Company issued to designees of the placement agent for 
that offering, warrants to purchase 45,900 shares of Series A 
Convertible Preferred Stock (the "Placement Agent Warrants").  
The Placement Agent Warrants entitle the holder to purchase 
Series A Convertible Preferred Stock at $11.00 per share, and may 
be exercised only on a "net exercise" basis that does not require 
the payment of any cash to the Company.  The Placement Agent 
Warrants are exercisable at any time after November 22, 1995 and 
will expire on the fifth anniversary of their issuance.  The 
Placement Agent Warrants contain provisions to protect the 
holders thereof against dilution by adjusting the price at which 
the Placement Agent Warrants are exercisable and the number of 
shares issuable upon exercise thereof upon the occurrence of 
certain events, including the payment of stock dividends and 
distributions, stock splits, recapitalizations, reclassifications 
and reorganizations affecting Series A Convertible Preferred 
Stock and issuances of Series A Convertible Preferred Stock at 
below the then market price (which is based on an "as-converted" 
market price based upon the market price of the Common Stock).  
Following the conversion of all of the Series A Convertible 
Preferred Stock into Common Stock, the Placement Agent Warrants 
will become warrants to purchase Common Stock and the 
antidilution provisions will apply to issuances of Common Stock 
instead of applying to issuances of Series A Convertible 

                                 17



Preferred Stock.  The holders of the Placement Agent Warrants and 
any shares of stock issuable upon exercise thereof have certain 
rights to register the Common Stock underlying such warrants in 
the resale registration statement that was filed with respect to 
the Common Stock underlying the Series A Convertible Preferred 
Stock.

As a result of the sale of the Convertible Notes and 1996 
Warrants, there were changes in the exercise price and number of 
shares for which warrants are exercisable pursuant to the 
antidilution provisions, the Capital Lease Warrants, the Bridge 
Warrants and the Representative's Warrant (but not the MediGene 
Warrants, May 1995 Warrants or Placement Agent Warrants).  These 
changes are reflected in the numbers set forth above.

Limitation on Directors' Liability; Indemnification

Delaware law authorizes corporations to limit or eliminate the 
personal liability of directors to corporations and their 
stockholders for monetary damages for breach of directors' 
fiduciary duty of care.  The Restated Certificate of 
Incorporation of the Company limits the liability of directors of 
the Company (in their capacity as directors but not in their 
capacity as officers) to the Company or its stockholders to the 
fullest extent permitted by Delaware law.  Specifically, 
directors of the Company will not be personally liable for 
monetary damages for breach of a director's fiduciary duty as a 
director, except for liability (i) for any breach of the 
director's duty of loyalty to the Company or its stockholders, 
(ii) for acts or omissions not in good faith or which involve 
intentional misconduct or a knowing violation of law, (iii) for 
unlawful payments of dividends or unlawful stock repurchases or 
redemptions as provided in Section 174 of the Delaware General 
Corporation Law or (iv) for any transaction from which the 
director derived an improper personal benefit.

The inclusion of this provision in the Restated Certificate of 
Incorporation may have the effect of reducing the likelihood of 
derivative litigation against directors, and may discourage or 
deter stockholders or management from bringing a lawsuit against 
directors for breach of their duty of care, even though such an 
action, if successful, might otherwise have benefited the Company 
and its stockholders.

The Company's Bylaws provide for the indemnification of its 
executive officers and directors, and the advancement to them of 
expenses in connection with proceedings and claims, to the 
fullest extent permitted by the Delaware General Corporation Law.  
The Bylaws include related provisions meant to facilitate the 
indemnitees' receipt of such benefits.  These provisions cover, 
among other things: (i) specification of the method of 
determining entitlement to indemnification and the selection of 
independent counsel that will in some cases make such 
determination, (ii) specification of certain time periods by 
which certain payments or determinations must be made and actions 
must be taken and (iii) the establishment of certain presumptions 
in favor of an indemnitee.  The benefits of certain of these 
provisions are available to an indemnitee only if there has been 
a change in control (as defined).  In addition, the Company has 
purchased customary directors' and officers' liability insurance 
policies for its directors and officers with limits of $1 
million.

Other Matters

The Company's Bylaws establish advance notice procedures with 
regard to the nomination, other than by or at the direction of 
the Board of Directors, of candidates for election as directors 
and with regard to certain matters to be brought before an annual 
meeting of stockholders of the Company.  These procedures provide 
that the notice of proposed stockholder nominations for election 
of directors must be timely given in writing to the Secretary of 
the Company prior to the meeting at which directors are to be 
elected.  The procedures also provide that at an annual meeting, 
and subject to any other applicable requirements, only such 
business may be conducted as has been brought before the meeting 
by, or at the direction of, the Board of Directors or by a 
stockholder who has given timely prior written notice to the 
Secretary of the Company of such stockholder's intention to bring 
such business before the meeting.  In all cases, to be timely, 
notice must be received at the principal executive offices of the 
Company not less than 90 days prior to the anniversary date of 
the immediately preceding annual meeting of stockholders (or if 
the election of directors is to be held at a special meeting of 
stockholders, not later than the 10th day following the day on 
which notice of the special meeting was mailed or public 
disclosure of the meeting was made, whichever occurs first).  The 
notice must contain certain information specified in the Bylaws.

The Company is a Delaware corporation and is subject to Section 
203 of the Delaware General Corporation Law (the "Delaware Law").  
Generally, Section 203 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 (i) prior to such date, either the business 
combination or such transaction is approved by the board of 
directors of the corporation, (ii) upon consummation of the 
transaction which resulted in the stockholder becoming an 
interested stockholder, the interested stockholder owns at least 
85% of the outstanding voting stock or (iii) on or after such 
date the business combination is approved by the board and by the 
affirmative vote of at least 66-2/3% of the outstanding voting 
stock that is not owned by the interested 

                                18



stockholder.  A "business combination" includes mergers, asset 
sales and certain other transactions resulting in a financial 
benefit to the interested stockholder.  An "interested 
stockholder" is a person who, together with affiliates and 
associates, owns (or within three years, did own) 15% or more of 
the corporation's outstanding voting stock.  The provisions of 
Section 203 of the Delaware Law could have the effect of 
delaying, deferring or preventing a change in control of the 
Company or the removal of existing management or deterring 
potential acquirors from making an offer to stockholders of the 
Company. This could be the case notwithstanding that a majority 
of the stockholders might benefit from such a change in control 
or offer.

Transfer Agent and Registrar

American Securities Transfer, Incorporated and United Missouri 
Trust Company of New York serve as the Co-Transfer Agents and Co-
Registrars for the Common Stock.


                 SELLING STOCKHOLDERS

Except as set forth below, none of the Selling Stockholders has 
had a material relationship with the Company within the past 
three years other than as a result of the ownership of the Shares 
or the underlying Convertible Notes or the underlying Series A 
Convertible Preferred Stock (or warrants to purchase the same), 
as described below.

Upon the acquisition by the Selling Stockholders of the 
Convertible Notes, the Series A Convertible Preferred Stock, or 
warrants to acquire Series A Convertible Preferred Stock, the 
conversion of which will result in the issuance by the Company of 
the Shares, or of the Shares issued directly to the Selling 
Stockholders, each Selling Stockholder represented to the Company 
that it was acquiring the Convertible Notes, the Series A 
Convertible Preferred Stock (or warrants to acquire Series A 
Convertible Preferred Stock) or the Common Stock for investment 
purposes only.  The Company granted the Selling Stockholders 
certain registration rights covering the resale of the Shares.  
The Company is filing under the Securities Act with the 
Commission a Registration Statement on Form S-3, of which this 
Prospectus forms a part, with respect to the resale of the Shares 
from time to time.  See "Plan of Distribution".

Shares Issuable Upon Conversion of Convertible Notes.  

Certain of the Shares may be acquired by the Selling Stockholders 
from the Company upon conversion of Convertible Notes issued in 
the sale of the Convertible Notes and the 1996 Warrants.  See 
"Recent Developments."  

A substantial part of the Notes and 1996 Warrants were purchased 
by existing stockholders and affiliates of the Company.  

W.S. Farish & Company purchased $1,170,000 of Convertible Notes 
and 1996 Warrants to acquire 76,050 shares of Common Stock.  
Prior to such purchase, W.S. Farish & Company was the owner of 
431,155 shares of Common Stock and warrants to acquire 50,510 
shares of Common Stock (the "Bridge Warrants").  The Bridge 
Warrants for 44,230 shares were issued in May, 1993 in connection 
with the purchase from the Company by W.S. Farish & Company of 
$239,167 in 10% promissory notes (the "Bridge Loans").  The 
Bridge Loans were repaid in October 1993 with the proceeds from 
the Company's initial public offering.  The Bridge Warrants for 
the remaining 6,280 shares were acquired in February 1994 from 
another stockholder.  In connection with antidilution provisions 
of the Bridge Warrants, upon the sale of the Convertible Notes 
and 1996 Warrants, the exercise price of the Bridge Warrants was 
reduced from $7.39 per share of Common Stock to $5.67 per share 
of Common Stock and the number of shares of Common Stock that may 
be purchased upon exercise of the Bridge Warrant increased to 
65,832 shares.  W.S. Farish & Company is a party to the Amended 
and Restated Stockholders' Agreement dated as of June 8, 1993 
among the Company and various stockholders (the "Stockholders' 
Agreement").  The Stockholders Agreement grants the parties 
thereto the right to include certain shares of Common Stock in 
any registration statements filed by the Company.  As set forth 
in the table below, W.S. Farish & Company has included 371,155 
shares of Common Stock in the Shares as a result of such 
registration rights in addition to the Shares issuable upon 
conversion of the Convertible Notes.  

Terry Ward is the Financial Vice President and a director of W.S. 
Farish & Company, and has been a director of the Company since 
March 1994 and Chairman of the Board of the Company since October 
1995.  Mr. Ward purchased $70,000 of Convertible Notes and 1996 
Warrants to acquire 4,550 shares of Common Stock.  Prior to such 
purchase, Mr. Ward was the owner of 16,966 shares of Common Stock 
and Bridge Warrants to acquire 4,629 shares of Common Stock.  The 
Bridge Warrants for 4,438 shares were issued in May, 1993 in 
connection with the purchase from the Company by Mr. Ward of 
$24,000 in 10% promissory notes (the "Bridge Loans").  The Bridge 
Loans were repaid in October 1993 with the proceeds from the 
Company's initial public offering.  The Bridge Warrants for the 
remaining 191 shares were acquired in February 1994 from another 
stockholder.  In connection with antidilution 

                                 19



provisions of the Bridge Warrants, upon the sale of the 
Convertible Notes and 1996 Warrants, the exercise price of the 
Bridge Warrants was reduced from $7.39 per share of Common Stock 
to $5.67 per share of Common Stock and the number of shares of 
Common Stock that may be purchased upon exercise of the Bridge 
Warrant increased to 6,032 shares.  Mr. Ward is a party to the 
Stockholders' Agreement which grants the parties thereto the 
right to include certain shares of Common Stock in any 
registration statements filed by the Company.  As set forth in 
the table below, Mr. Ward has included 15,966 shares of Common 
Stock in the Shares as a result of such registration rights in 
addition to the Shares issuable upon conversion of the 
Convertible Notes.  As a director of the Company, Mr. Ward has 
also been granted options to acquire Common Stock under the 
Directors Stock Option Plan.  The number of shares subject to the 
options and the exercise prices are as follows: 4,000 shares 
exercisable at $7.375 per share granted in January 1995, 4,800 
shares exercisable at $1.75 per share granted  in January 1996, 
and 10,000 shares exercisable at $1.1875 granted in July 1996.

Mr. W.S. Farish purchased $100,000 of Convertible Notes and 1996 
Warrants to acquire 6,500 shares of Common Stock.  Mr. Farish is 
a director and stockholder in W.S. Farish and Company.  Members 
of Mr. Farish's immediate family also acquired $50,000 of 
Convertible Notes and 1996 Warrants to acquire 3,250 shares of 
Common Stock.  Prior to such purchase, Mr. Farish was the owner 
of 6,942 shares of Common Stock and Bridge Warrants to acquire 
4,438 shares of Common Stock.  The Bridge Warrants were issued in 
May, 1993 in connection with the purchase from the Company by Mr. 
Farish of $24,000 in Bridge Loans.  The Bridge Loans were repaid 
in October 1993 with the proceeds from the Company's initial 
public offering.  In connection with antidilution provisions of 
the Bridge Warrants, upon the sale of the Convertible Notes and 
1996 Warrants, the exercise price of the Bridge Warrants was 
reduced from $7.39 per share of Common Stock to $5.67 per share 
of Common Stock and the number of shares of Common Stock that may 
be purchased upon exercise of the Bridge Warrant increased to 
5,784 shares.  Mr. Farish is a party to the Stockholders' 
Agreement which grants the parties thereto the right to include 
certain shares of Common Stock in any registration statements 
filed by the Company.  As set forth in the table below, Mr. 
Farish has included 6,942 shares of Common Stock in the Shares as 
a result of such registration rights in addition to the Shares 
issuable upon conversion of the Convertible Notes.  

WestMed Venture Partners L.P. ("WestMed") purchased $200,000 of 
Convertible Notes and 1996 Warrants to acquire 13,000 shares of 
Common Stock.  Prior to such purchase, WestMed was the owner of 
476,739 shares of Common Stock and Bridge Warrants to acquire 
16,458 shares of Common Stock.  The Bridge Warrants were issued 
in May, 1993 in connection with the purchase from the Company by 
WestMed of $89,000 in Bridge Loans.  The Bridge Loans were repaid 
in October 1993 with the proceeds from the Company's initial 
public offering.  In connection with antidilution provisions of 
the Bridge Warrants, upon the sale of the Convertible Notes and 
1996 Warrants, the exercise price of the Bridge Warrants was 
reduced from $7.39 per share of Common Stock to $5.67 per share 
of Common Stock and the number of shares of Common Stock that may 
be purchased upon exercise of the Bridge Warrant increased to 
21,450 shares.  WestMed is a party to the Stockholders' Agreement 
which grants the parties thereto the right to include certain 
shares of Common Stock in any registration statements filed by 
the Company.  As set forth in the table below, WestMed has 
included 476,739 shares of Common Stock in the Shares as a result 
of such registration rights. Mr. Philippe Sommer is the President 
of Alsacia & Sommer, Inc., which provides consulting services to 
early-stage health care companies.  Mr. Sommer is also the 
President of Alsacia Venture Management, Inc., which provides 
management services to Medical Venture Holdings, Inc., which is 
the general partner of the managing general partner of WestMed 
Venture Partners, L.P. Mr. Sommer was elected to the Board of 
Directors of the Company in August, 1996.  Mr. Sommer was 
previously a director of the Company from 1989 until October, 
1994.

Shares Issuable Upon Conversion of Series A Convertible 
Preferred Stock.  

Certain of the Shares may be acquired by the Selling 
Stockholders from the Company upon conversion of Series A 
Convertible Preferred Stock (or warrants to purchase the same) 
issued by the Company in May 1995 (the "Preferred Stock 
Offering").  The Company sold 459,000 shares of Series A 
Convertible Preferred Stock for gross proceeds of $4,590,000 in 
the Preferred Stock Offering.  Certain Selling Stockholders are 
employees and officers of the placement agent for the Preferred 
Stock Offering (the "Placement Agent").  Pursuant to the 
Placement Agency Agreement between the Company and the Placement 
Agent, the Company paid to the Placement Agent for its services 
compensation in the form of (i) an advance non-refundable 
expense payment of $30,000, creditable against the Expense 
Allowance (as defined below), (ii) cash commissions of $280,625 
(equal to 6.25% of the gross proceeds from the sale of all 
Series A Convertible Preferred Stock), (iii) a non-accountable 
expense allowance of $112,250 (equal to 2.5% of the gross 
proceeds from the sale of all Series A Convertible Preferred 
Stock (the "Expense Allowance")) and (iv) warrants to acquire 
45,900 newly issued shares of Series A Convertible Preferred 
Stock (equal to 10% of the Series A Convertible Preferred Stock 
issued in the Preferred Stock Offering).  

Shares Issued in the May 1995 Common Stock Offering.  

Certain of the Shares were acquired from the Company in private 
placements of Common Stock and warrants in May 1995 (the "1995 
Common Offering").  The Company sold 144,300 shares of Common 
Stock and warrants to acquire 28,860 shares of Common Stock at a 
price of $4.50 per unit, with a unit consisting of one share of 
Common Stock and one-fifth of a warrant.  The warrants 

                                 20



were originally exercisable at $7.25 per share, but the exercise 
price of certain of the warrants have been reduced by amendment 
to $3.00 per share.

Shares Issued in Prior Private Placements.  

The Company and certain of its stockholders are party to the 
Amended and Restated Stockholders' Agreement dated as of June 8, 
1993 (the Stockholders' Agreement") which imposes certain 
restrictions on the transfer of the Common Stock subject to the 
Stockholders' Agreement and grants the parties the right to 
participate in certain registration statements filed by the 
Company.  Shares of certain of the Selling Stockholders are 
included below by exercise of such registration rights by the 
Selling Stockholder.

Shares Issued to Research Development Foundation.  

In August 1995, the Company acquired ownership of certain patent 
rights for its core technology previously licensed to the Company 
by the Research Development Foundation ("RDF") in 1989.  The 
Company issued 125,000 shares of Common Stock to RDF in the 
acquisition, and, by amendment to the Amended and Restated 
Stockholders Agreement dated as of June 8, 1993 among Aprogenex 
and various of its stockholders, RDF was granted the right to 
participate in certain registration statements filed by the 
Company.  As set forth in the table below, RDF has included 
125,000 shares of Common Stock in the Shares as a result of such 
registration rights. 

Selling Stockholders.  

The Shares offered by this Prospectus may be offered from time to 
time by the Selling Stockholders named below.  The following 
table sets forth certain information, as of the date hereof, with 
respect to the number of Shares attributable to each of the 
Selling Stockholders and as adjusted to give effect to the sale 
of the Common Stock offered hereby.  The Shares are being 
registered to permit public secondary trading of the Shares, and 
the Selling Stockholders may offer the Shares for resale from 
time to time.  See "Plan of Distribution".


                     Number of Shares
                    Beneficially Owned        Beneficial 
Ownership
                     Prior to Offering           After Offering

                                           Number
                                         of Shares  Number
      Name of         Number of            Being      of
Selling Stockholders  Shares (1) Percent  Offered   Shares 
Percent

W.S. Farish &          1,662,676  24.2%  1,662,676     0      _	
Company (1)(2)

W.S. Farish (1)(2)       117,328   2.2%    117,328     0      _	

Terry W. Ward (1)(2)      93,236   1.8%     93,236     0      _	


William S. Farish, Jr.(1) 55,193   1.1%     55,193     0      _	

Carol D. Cockrell,       116,991   2.2%    116,991     0      _	
Louisiana Trust (1)(2)

Ernest H. Cockrell,      116,991   2.2%    116,991     0      _	
Louisiana Trust (1)(2)

Laura V. Jennings, Texas  34,495     *      34,495     0      _	
Test. Trust (1)

John W. Jennings III, 
Texas Test. Trust (1)     34,495     *      34,495     0      _	


Ernest D. Cockrell II,    34,495     *      34,495     0      _	
Texas Test. Trust (1)

David A. Cockrell,        34,495     *      34,495     0      _	
Texas Test. Trust (1)

Milton T. Graves (1)      16,557     *      16,557     0      _	

Harry Strulovici, M.D.(1) 55,193   1.1%     55,193     0      _	


                                 21



A.W. Epley III (1)       110,386   2.1%    110,386     0      _	

Westmed Venture          697,511  11.8%    697,511     0      _	
Partners (1)(2)

Palmetto Partners,        49,800     *      49,800     0      _	
Inc. (3)

David J. Bershad (3)      49,800     *      49,800     0      -	

Arthur J. Nagle (3)       12,450     *      12,450     0      _	

David W. Ruttenberg (3)   12,450     *      12,450     0      _	

J.F. Shea Co., Inc. (3)   74,700   1.4%     74,700     0      _	

Yonah J. Hamlet, M.D.     12,450     *      12,450     0      _	
Profit Sharing Plan (3)

H. Virgil Sherrill (3)   124,500   2.3%    124,500     0      _	

Richard Wurtman (3)       12,450     *      12,450     0      _	

Bruce Slovin (3)          49,800     *      49,800     0      _	

Leeor Sabbah (3)          99,600   1.9%     99,600     0      _	

M.D. Sabbah (3)          199,200   3.7%    199,200     0      _	

Donald G. Drapkin (3)     37,350     *      37,350     0      _	

Myron M. Teitelbaum,      12,450     *      12,450     0      _	
M.D. (3)

Seymour Buehler (3)       24,900     *      24,900     0      _	

The 1992 Houston          37,350     *      37,350     0      _	
Parthnership, L.P. (3)

Jackson Hole Investments  49,800     *      49,800     0      _	
Acquisitions, L.P. (3)

Burton P. Hoffner (3)     12,450     *      12,450     0      _	

S. Sauder Trust (3)       24,900     *      24,900     0      _	

Keys Foundation (3)      249,000   4.6%    249,000     0      _	

Melvyn I. Weiss (3)       24,900     *      24,900     0      _	

Robert J. Conrads (3)     24,900     *      24,900     0      _	

Herbert Hoffner (3)       12,450     *      12,450     0      _	

Jerry L. Ruyan (3)        24,900     *      24,900     0      _	

Hermann Merkin (3)        12,450     *      12,450     0      _	

Erica Jesselson, Lucy     49,800     *      49,800     0      _	
Lang,Claire Strauss,
Michael G.Jesselson,
Benjamin J. Jesselson
Trustee UID 12/18/80 FBO
Michael G.Jesselson (3)

                                 22



Donald R. Kendall, Jr. &  12,450     *      12,450     0      _	
Diane S. Kendall (3)

Uzi Zucker (3)            24,900     *      24,900     0      _	

Marvin Rosen (3)          24,900     *      24,900     0      _	

Elizabeth K. and Robert   37,350     *      37,350     0      _	
P. Gordon (3)

Leland Corporation (3)    49,800     *      49,800     0      _	

Daniel E. Koshland (3)    24,900     *      24,900     0      _	

Lawrence J. Kessell,      12,450     *      12,450     0      _	
M.D. (3)

Patrick J. Callahan,      12,450     *      12,450     0      _	
Jr. (3)

Lake Trust U/A            99,600   1.9%     99,600     0      _	
DTD 9/3/91 (3)

Armen Partners (3)        99,600   1.9%     99,600     0      _	

South Ferry #2 L.P.(3)   124,500   2.3%    124,500     0      _	

Lon Hayden Brooks (3)     24,900     *      24,900     0      _	

The Aries Trust (3)       19,920     *      19,920     0      _	

Aries Domestic Fund,      39,840     *      39,840     0      _	
LP (3)

Linton Lake S.A. (3)      24,900     *      24,900     0      _	

Gerlach & Co. (3)         42,600     *      42,600     0      _	

Marcy F. Blender and       4,980     *       4,980     0      _	
Alan M.Blender (3)

Venturetek, L.P. (3)      99,600   1.9%     99,600     0      _	

Dr. Juerg F. Geigy (3)    24,900     *      24,900     0      _	

Mark Goodman (3)          24,900     *      24,900     0      _	

Hayden Leason (3)         99,600   1.9%     99,600     0      _	

Gregory S. Lenchner,       4,980     *       4,980     0      _	
M.D. (3)

Irja Steiner (3)          49,800     *      49,800     0      _	

Martin S. Kratchman (4)    2,321     *       2,321     0      -	

Timothy S. McInerney (4)   4,357     *       4,357     0      _	

Scott A. Katzmann (4)     27,203     *      27,203     0      _	

Michael S. Weiss (4)      17,143     *      17,143     0      _	

Lindsay A. Rosenwald (4) 147,233   2.8%    147,233     0      _	

Peter M. Kash (4)         12,431     *      12,431     0      _	


                                 23



Wayne L. Rubin (4)        17,143     *      17,143     0      _	

Paviland Finance             747     *         747     0      _	
(Canada) Ltd.(4)

Ernest H. Cockrell (2)   104,000   2.0%    104,000     0      _	

Research Development     125,000   2.3%    125,000     0      _	
Foundation (2)

MediGene, Inc. (2)       100,000   1.9%    100,000     0      _	

Ryan J. O'Neill (2)        4,000     *       4,000     0      _	

Lester T. Vesell (2)      25,000     *      25,000     0      _	

Lenox Investments,        32,000     *      32,000     0      _	
Ltd.(2)

Ernest Gottdiener (2)     25,000     *      25,000     0      _	

Robert Schenck (2)        33,300     *      33,300     0      _	

Frank Zee (2)             10,000     *      10,000     0      _	

G&G Diagnostics, L.P.(2)  15,000     *      15,000     0      _
- -----------------------
*  Less than 1%.

(1)  Includes the number of shares of Common Stock into which the 
Convertible Notes held by the Selling Stockholders, plus accrued 
interest through the maturity date of the Convertible Notes, 
would be convertible. 
(2)  Includes Common Stock included through the exercise of 
registration rights under the Stockholders' Agreement or other 
registration rights.
(3)  Represents the number of shares of Common Stock into which 
the shares of Series A Convertible Preferred Stock held by the 
Selling Stockholders would be convertible. 
(4)  Represents the number of shares of Common Stock into which 
the shares of Series A Convertible Preferred Stock would be 
convertible, assuming the exercise of the warrants to acquire 
Series A Convertible Preferred Stock held by the Selling 
Stockholders 


                  PLAN OF DISTRIBUTION

General

Sales of the Shares by the Selling Stockholders may be made from 
time to time in one or more transactions, including block 
transactions, on the American Stock Exchange or any other 
exchange or quotation system on which the Shares may be listed 
or quoted (collectively, the "Exchanges") pursuant to and in 
accordance with the applicable rules of the Exchanges, in 
negotiated transactions or in a combination of any such methods 
of sale, at fixed prices that may be changed, at market prices 
prevailing at the time of sale, at prices related to such 
prevailing market prices or at negotiated prices.  The Shares 
may be offered directly, to or through agents designated from 
time to time or to or through brokers or dealers, or through any 
combination of these methods of sale.  Such agent, broker or 
dealer may receive compensation in the form of discounts, 
concessions or commissions from the Selling Stockholders and/or 
the purchasers of the Shares for whom such broker-dealers may 
act as agents or to whom they sell as principals, or both (which 
compensation as to a particular broker-dealer might be in excess 
of customary commissions).  A member firm of an Exchange may be 
engaged to act as the Selling Stockholder's agent in the sale of 
Shares by the Selling Stockholders.  To the extent required, 
specific information regarding the Shares will be set forth in a 
Prospectus Supplement.

The Selling Stockholders and any brokers, dealers, agents or 
others that participate with the Selling Stockholders in the 
distribution of the Shares may be deemed to be "underwriters" 
within the meaning of the Securities Act, and any commissions or 
fees received by such persons and any profit on the resale of 
the Shares purchased by such persons may be deemed to be 
underwriting commissions or discounts under the Securities Act.

                                24



Agents, brokers and dealers may be entitled under agreements 
entered into by the Selling Stockholders and/or the Company to 
indemnification against certain civil liabilities, including 
liabilities under the Securities Act.

There is no assurance that any of the Selling Stockholders will 
sell any or all of the shares of Common Stock offered hereby.

Original Issuance of the Shares

Under the terms of the Convertible Note Subscription Agreements 
executed by each purchaser of Convertible Notes, the Subscription 
Agreements executed by each purchaser of Series A Convertible 
Preferred Stock and the warrants to acquire Series A Convertible 
Preferred Stock, the purchase agreements for Common Stock sold in 
the 1995 Common Offering, as well as under the terms of the 
Stockholders' Agreement, the Company agreed to register under the 
Securities Act the Common Stock issuable upon conversion of the 
Convertible Notes or Series A Convertible Preferred Stock or 
previously issued to the Selling Stockholders and to indemnify 
and hold the Selling Stockholders and certain related person 
harmless against certain liabilities under the Securities Act 
that could arise in connection with the sale by the Selling 
Stockholders of the Shares.  

The Company has agreed to pay all reasonable fees and expenses 
incident to the filing of this Registration Statement, but not 
selling commissions or discounts.


                     LEGAL MATTERS

Certain legal matters in connection with the Shares will be 
passed upon for the Company by Baker & Botts, L.L.P., Houston, 
Texas.

                       EXPERTS

The financial statements of the Company incorporated by reference 
in this Prospectus, to the extent and for the periods indicated 
in their report with respect thereto, have been audited by Arthur 
Andersen LLP, independent public accountants, and are 
incorporated by reference herein in reliance upon the authority 
of said firm in giving said report, which includes an explanatory 
paragraph that describes the uncertainty regarding the Company's 
ability to continue as a going concern.

                               25



                        PART II

         INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  Other Expenses of Issuance and Distribution

All expenses (other than underwriting discounts and commissions 
and fees and expenses of legal or other advisers to the Selling 
Stockholders) in connection with the offering described in this 
Registration Statement will be paid by the Company.  Such 
expenses are estimated (other than the Commission's registration 
fee) as follows:


Securities and Exchange Commission Registration   $ 1,176
Printing expenses.................................    250
Accounting fees and expenses......................  3,000
Legal fees and expenses........................... 10,000
Blue Sky qualification fees and expenses..........    300
Miscellaneous.....................................    500
                                                  -------
     Total...................................... .$15,226
                                                  =======


ITEM 15.  Indemnification of Directors and Officers

The Restated Certificate of Incorporation, as amended, of the 
Company limits the personal liability of directors of the Company 
to the Company or its stockholders for monetary damages for 
breach of fiduciary duty as a director to the fullest extent 
permitted by Delaware law.  Specifically, directors of the 
Company will not be held personally liable for monetary damages 
for breach of a director's fiduciary duty as a director, except 
for liability (i) for any breach of the director's duty of 
loyalty to the Company 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, which relates to 
unlawful payments of dividends or unlawful stock repurchases or 
redemptions or (iv) for any transaction from which the director 
derived an improper personal benefit.  The Delaware General 
Corporation Law does not eliminate a director's duty of care and 
has no effect on the availability of equitable remedies such as 
injunction or rescission based upon a director's breach of the 
duty of care.

Section 145 of the Delaware General Corporation Law permits a 
Delaware corporation to indemnify any persons who are, or are 
threatened to be made, parties to any threatened, pending or 
completed legal action, suit or proceeding, whether civil, 
criminal, administrative or investigative (other than an action 
by or in the right of such corporation), by reason of the fact 
that such person is or was a director, officer, employee or agent 
of such  corporation, or is or was serving at the request of such 
corporation as a director, officer, employee or agent of another 
corporation or enterprise.  The indemnity may include expenses 
(including attorneys' fees), judgments, fines and amounts paid in 
settlement actually and reasonably incurred by such person in 
connection with such action, suit or proceeding, provided that 
such officer or director acted in good faith and in a manner he 
reasonably believed to be in or not opposed to the corporation's 
best interest, or, for criminal proceedings, had no reasonable 
cause to believe his conduct was illegal.  A Delaware corporation 
may indemnify officers and directors in an action by or in the 
right of the corporation under the same conditions, except that 
no indemnification is permitted without judicial approval if the 
officer or director is adjudged to be liable to the corporation 
in the performance of his duty.  Where an officer or director is 
successful on the merits or otherwise in the defense of any 
action referred to above, the corporation must indemnify him 
against the expenses with such officer or director actually and 
reasonably incurred.

The Company's Bylaws provide for the indemnification of its 
executive officers and directors, and the advancement to them of 
expenses in connection with proceedings and claims, to the 
fullest extent permitted by the Delaware General Corporation Law.  
The Bylaws include related provisions meant to facilitate the 
indemnitees' receipt of such benefits.  These provisions cover, 
among other things: (i) specification of the method of 
determining entitlement to indemnification and the selection of 
independent counsel that will in some cases make such 
determination, (ii) specification of certain time periods by 
which certain payments of determinations must be made and actions 
must be taken and (iii) the establishment of certain presumptions 
in favor of an indemnitee.  The benefits of certain of these 
provisions are available to an indemnitee only if there has been 
a change in control (as defined).  In addition, the Company has 
purchased customary directors' and officers' liability insurance 
policies for its directors and officer.


                               II-1




ITEM 16.  Exhibits


Exhibits incorporated by reference to a prior filing are 
designated by an asterisk (*).

Exhibit
Number       Description

4.1*  Amended and Restated Certificate of Incorporation of the 
Company.  (Incorporated by reference from Exhibit 3.1 to the 
Company's Registration Statement on Form SB-2, Reg. No. 33-66586-
FW, declared effective October 15, 1993).

4.2*  Certificate of Amendment of Amended and Restated 
Certificate of Incorporation of Aprogenex, Inc. effective as of  
June 10, 1994 (Incorporated by reference from Exhibit 3.1 to the 
Company's Form 10-QSB for the quarterly period ended June 30, 
1994).

4.3*  Certificate of Designations of Series A Convertible 
Preferred Stock effective May 26, 1995 (Incorporated by reference 
from Exhibit 4.4 to the Company's Registration Statement on Form 
S3, Reg No. 33-95014, filed July 26, 1995).

4.4*  Bylaws of the Company (Incorporated by reference from 
Exhibit 4-3 to the Company's Registration Statement on Form S-3, 
Reg. No. 33-90514, filed on July 26, 1995).

4.5*  Form of Certificate of Common Stock.  (Incorporated by 
reference from Exhibit 4.1 to the Company's Registration 
Statement on Form SB-2, Reg. No. 33-66586-FW, declared effective 
October 15, 1993.)

4.6*  Convertible Note Subscription Agreement dated as of May 1, 
1996 among Aprogenex, Inc. and the various purchasers 
(Incorporated by reference from Exhibit 4.1(a) to the Company's 
Form 8-K dated as of June 12, 1996).

4.7*  Form of Convertible Note dated as of June 12, 1996 
(Incorporated by reference from Exhibit 4.1(b) to the Company's 
Form 8-K dated as of June 12, 1996).

4.8*  Director Stock Option Plan, as Amended and Restated on July 
12, 1996 (Incorporated by reference from Exhibit 4.1 to the 
Company's Form 10-QSB for the period ended June 30, 1996).

5     Opinion of Baker and Botts, L.L.P.

23.1  Consent of Baker and Botts, L.L.P. (included in Exhibit 5).

23.2  Consent of Arthur Andersen LLP.
- --------------------

ITEM 17.  Undertakings

The registrant will:
     (1)  File, during any period in which it offers or sells 
securities, a post-effective amendment to this registration 
statement to include any additional or changed material 
information on the plan of distribution.

     (2)  For purposes of determining liability under the 
Securities Act, treat each post-effective amendment as a new 
registration statement of the securities offered, and the 
offering of the securities at that time to be the initial bona 
fide offering.

     (3)  File a post-effective amendment to remove from 
registration any of the securities that remain unsold at the end 
of the offering.

Insofar as indemnification for liabilities arising under the 
Securities Act may be permitted to directors, officers and 
controlling persons of the registrant pursuant to the foregoing 
provisions, 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 
Securities 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  issuer in 
the successful defense of any action, suit or proceeding) is 

                               II-2



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.

                                II-3



                         SIGNATURES

Pursuant to 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 S-3 and  as duly caused this Registration Statement or 
Amendment to be signed on its behalf by the  undersigned, 
thereunto duly authorized, in the City of Houston, the State 
of Texas, on August 8, 1996.

                                    APROGENEX, INC.


                              By: /s/ J. Donald Payne
                                      ---------------------------
- -
                                   J. Donald Payne
                                   Vice President_Finance 
                                   Chief Financial Officer

Pursuant to the requirements of the Securities Act of 
1933, this Registration Statement or Amendment has been 
signed by the following persons in the capacities stated on 
August 8, 1996.

Signature                           Title


/s/ David M. Leech
- -------------------------------     Acting President and Chief
(David M. Leech)                  Executive Officer and 
Director
                                    (Principal Executive Officer) 


/s/ J. Donald Payne
- ---------------------------     Vice President_Finance, Chief
(J. Donald Payne)                 Financial Officer and 
Director
                                    (Principal Financial and
                                    Accounting Officer)


/s/ Terry W. Ward
- ---------------------------     Director
(Terry W. Ward) 


/s/ Christopher T. Kelly
- ---------------------------     Director
(Christopher T. Kelly) 


/s/ Dr. Michael Hogan
- ---------------------------     Director
(Dr. Michael Hogan) 


                          II-4



                          Exhibit Index


Exhibits incorporated by reference to a prior filing are 
designated by an asterisk (*).

Exhibit
Number       Description

4.1*  Amended and Restated Certificate of Incorporation of the 
Company.  (Incorporated by reference from Exhibit 3.1 to the 
Company's Registration Statement on Form SB-2, Reg. No. 33-66586-
FW, declared effective October 15, 1993).

4.2*  Certificate of Amendment of Amended and Restated 
Certificate of Incorporation of Aprogenex, Inc. effective as of  
June 10, 1994 (Incorporated by reference from Exhibit 3.1 to the 
Company's Form 10-QSB for the quarterly period ended June 30, 
1994).

4.3*  Certificate of Designations of Series A Convertible 
Preferred Stock effective May 26, 1995 (Incorporated by reference 
from Exhibit 4.4 to the Company's Registration Statement on Form 
S3, Reg No. 33-95014, filed July 26, 1995).

4.4*  Bylaws of the Company (Incorporated by reference from 
Exhibit 4-3 to the Company's Registration Statement on Form S-3, 
Reg. No. 33-90514, filed on July 26, 1995).

4.5*  Form of Certificate of Common Stock.  (Incorporated by 
reference from Exhibit 4.1 to the Company's Registration 
Statement on Form SB-2, Reg. No. 33-66586-FW, declared effective 
October 15, 1993.)

4.6*  Convertible Note Subscription Agreement dated as of May 1, 
1996 among Aprogenex, Inc. and the various purchasers 
(Incorporated by reference from Exhibit 4.1(a) to the Company's 
Form 8-K dated as of June 12, 1996).

4.7*  Form of Convertible Note dated as of June 12, 1996 
(Incorporated by reference from Exhibit 4.1(b) to the Company's 
Form 8-K dated as of June 12, 1996).

4.8*  Director Stock Option Plan, as Amended and Restated on July 
12, 1996 (Incorporated by reference from Exhibit 4.1 to the 
Company's Form 10-QSB for the period ended June 30, 1996).

5     Opinion of Baker and Botts, L.L.P.

23.1  Consent of Baker and Botts, L.L.P. (included in Exhibit 5).

23.2  Consent of Arthur Andersen LLP.










Exhibit 5

BAKER & BOTTS
L.L.P.
ONE SHELL PLAZA
910 LOUISIANA
HOUSTON, TEXAS 77002-4995


19581.011                                         August 8, 1996




Aprogenex, Inc.
8000 El Rio Street
Houston, Texas  77054-4104


Ladies and Gentlemen:

As set forth in a Registration Statement on Form S-3 (the 
"Registration Statement"), to be filed by Aprogenex, Inc., a 
Delaware corporation (the "Company"), with the Securities and 
Exchange Commission (the "Commission") under the Securities Act 
of 1933, as amended (the "Act"), relating to 3,391,740 shares 
(the "Shares") of the Company's common stock, par value $.001 per 
share ("Common Stock"), certain legal matters in connection with 
the Shares are being passed upon for the Company by us.  Certain 
of the Shares (the  Conversion Shares ) are issuable upon (i) the 
conversion of the aggregate principal amount of $2,005,000 of the 
Company s Convertible Notes due May 29, 1998 (the  Notes ), into 
shares of Common Stock and (ii) the conversion of accrued 
interest on the Notes that may accrue through maturity of the 
Notes into shares of Common Stock.  We understand that (a) the 
Notes were issued to the holders thereof pursuant to Convertible 
Note Subscription Agreements dated as of May 1, 1996 (the  
Agreements ), a form of which was incorporated by reference as 
Exhibit 4.6 to the Registration Statement from Exhibit 4.1(a) to 
the Company s Form 8-K dated as of June 12, 1996 and (b) the 
Notes are convertible into shares of Common Stock pursuant to the 
terms and conditions of the Agreements and the Notes, a form of 
which was incorporated by reference as Exhibit 4.7 to the 
Registration Statement from Exhibit 4.1(b) to the Company s Form 
8-K dated as of June 12, 1996.

We have acted as the Company's counsel in connection with the 
registration by the Company of the proposed sale of the Shares by 
certain selling shareholders.  In such capacity, we have examined 
the Company's Amended and Restated Certificate of Incorporation 
and Bylaws, each as amended to date, and have examined the 
originals, or copies certified or otherwise identified, of 
corporate records of the Company, certificates of public 
officials and of representatives of the Company, statutes and 
other instruments and documents as a basis for the opinions 
hereinafter expressed.  In giving such opinions, we have relied 
upon certificates of officers of the Company with respect to the 
accuracy of the material factual matters contained in such 
certificates.



Aprogenex, Inc.                   -2-               August 8, 
1996


On the basis of the foregoing, and subject to the assumptions, 
limitations and qualifications hereinafter set forth, we are of 
the opinion that:

1.  The Shares have been duly authorized by all necessary 
corporate action on the part of the Company.

2.  If and when issued to holders of Notes upon conversion 
thereof in accordance with the terms and conditions of the 
Agreements and the Notes, the Conversion Shares will be validly 
issued, fully paid and nonassessable.

3.  The Shares (other than the Conversion Shares) are validly 
issued, fully paid and nonassessable.

We hereby consent to the filing of this opinion as an exhibit to 
the Registration Statement and to the reference to us under 
"Legal Matters" in the prospectus forming a part of the 
Registration Statement.


                               Very truly yours,



                               /s/ Baker & Botts, L.L.P.


GJO; MLW


                       EXHIBIT 23.2



          CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountant, we hereby consent to the 
incorporation by reference in this Form S-3 Registration 
Statement of our report dated February 2, 1996, included in 
Aprogenex, Inc.'s Form 10-KSB for the year ended December 31, 
1995, and to all references to our firm included in this 
registration statement.




/s/ ARTHUR ANDERSEN LLP
- --------------------------
Houston, Texas
August 8, 1996


 





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