GENZYME TRANSGENICS CORP
S-3, 1998-07-16
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>

     As filed with the Securities and Exchange Commission on July 16, 1998.

                                                 REGISTRATION NO. 333-______

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

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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

                         GENZYME TRANSGENICS CORPORATION
             (Exact name of registrant as specified in its charter)

        Massachusetts                                    04-3186494
(State or other jurisdiction                           (I.R.S. Employer
of incorporation or organization)                  Identification Number)


       Five Mountain Road, Framingham, Massachusetts, 01701 (508) 620-9700
   (Address, including zip code, and telephone number, including area code, of
registrant's principal executive offices)

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

                            SANDRA NUSINOFF LEHRMAN
                      President and Chief Executive Officer
                         Genzyme Transgenics Corporation
                               Five Mountain Road
                         Framingham, Massachusetts 01701
                                 (508) 620-9700
 (Name, address, including zip code, and telephone number, including area code,
                            of agent for service)

                                 with copies to:

                           LYNNETTE C. FALLON, ESQUIRE
                               Palmer & Dodge LLP
                                One Beacon Street
                           Boston, Massachusetts 02108
                                 (617) 573-0100

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

        Approximate date of commencement of proposed sale to the public:

   From time to time after the effective date of this Registration Statement.

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

If the only securities being registered on this form are being 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/

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

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

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

                       CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------
                                                                  Proposed maximum       Proposed maximum
Title of each class of securities to be       Amount to be       offering price per     aggregate offering       Amount of
            registered                        registered             share(1)                price           registration fee
- -----------------------------------------------------------------------------------------------------------------------------
<S>                                          <C>                 <C>                    <C>                  <C>
Common Stock, $0.01 par value                48,284 shares            $7.25                 $350,059.00            $103.27
- -----------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)     Estimated solely for the purpose of determining the registration fee
        and computed pursuant to Rule 457(c), based upon the average of the
        high and low sale prices on July 15, 1998, as reported by the Nasdaq
        National Market.

<PAGE>

         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.

<PAGE>

PROSPECTUS

                                   48,284 SHARES

                         GENZYME TRANSGENICS CORPORATION

                     COMMON STOCK, PAR VALUE $0.01 PER SHARE

     This Prospectus relates to the offer and sale of up to 48,284 shares 
(the "Shares") of Common Stock, $0.01 par value (the "Common Stock") of 
Genzyme Transgenics Corporation ("GTC" or the "Company") by an existing 
stockholder of the Company (the "Selling Stockholder"). The Shares may be 
offered and sold by the Selling Stockholder from time to time in open market 
or privately-negotiated transactions, at market prices prevailing at the time 
of sale, at prices related to such prevailing market prices or at negotiated 
prices. The Selling Stockholder may effect such transactions by selling the 
Shares to or through broker-dealers and such broker-dealers may receive 
compensation in the form of discounts, concessions or commissions from the 
Selling Stockholder or the purchasers of the Shares for whom such 
broker-dealers may act as agent or to whom they sell as principal or both 
(which compensation to a particular broker-dealer might be in excess of 
customary commissions). See "Selling Stockholder" and "Plan of Distribution."

    None of the proceeds from the sale of the Shares by the Selling 
Stockholder will be received by the Company.

    The Common Stock of the Company is listed for quotation on the Nasdaq 
National Market under the symbol GZTC. On July 14, 1998, the closing sale 
price of the Common Stock, as reported by Nasdaq, was $7.375 per share.

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

           AN INVESTMENT IN THE SECURITIES REGISTERED HEREBY INVOLVES
                    A HIGH DEGREE OF RISK. SEE "RISK FACTORS"

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

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.

    No person is authorized, in connection with the offering made hereby, to 
give any information or to make any representation other than as contained in 
this Prospectus, and, if given or made, such information or representations 
must not be relied upon as having been authorized by the Company. This 
Prospectus is not an offer to sell, or a solicitation of an offer to buy, by 
any person in any jurisdiction in which it is unlawful for such person to 
make such an offer or solicitation.

                The date of this Prospectus is July ___, 1998


<PAGE>


                                TABLE OF CONTENTS

<TABLE>
<CAPTION>


                                                                                                                       Page
<S>                                                                                                                    <C>
AVAILABLE INFORMATION................................................................................................... 3

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE......................................................................... 3

RISK FACTORS............................................................................................................ 4

THE COMPANY............................................................................................................. 9

SELLING STOCKHOLDER..................................................................................................... 9

PLAN OF DISTRIBUTION.................................................................................................... 9

LEGALITY OF COMMON STOCK............................................................................................... 10

EXPERTS................................................................................................................ 10
</TABLE>

                                        2

<PAGE>

                               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"). Reports, 
proxy and information statements and other information filed by the Company 
can be inspected and copied at the public reference facilities of the 
Commission, Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, 
D.C. 20549 and at the Commission's regional offices located at 7 World Trade 
Center, 13th Floor, New York, New York 10048 and Northwestern Atrium Center, 
500 West Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of such 
materials can be obtained from the Public Reference Section of the Commission 
at 450 Fifth Street, N.W., Washington, D.C. 20549 at prescribed rates. Such 
reports and other information can also be reviewed through the Commission's 
web site on the Internet (http://www.sec.gov). The Common Stock of the 
Company is quoted on the Nasdaq National Market. Reports and other 
information concerning the Company may be inspected at the National 
Association of Securities Dealers, Inc., 1735 K Street, N.W., Washington, 
D.C. 20006-1506.

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

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents filed with the Commission (File No. 0-21794), 
pursuant to the Exchange Act, are incorporated herein by reference:

     (a)  The Company's Annual Report on Form 10-K for the fiscal year ended 
          December 28, 1997, filed with the Commission March 27, 1998.

     (b)  All other reports, if any, filed by the Company pursuant to Section 
          13(a) or 15(d) of the Exchange Act since the Annual Report referred 
          to in paragraph (a) above.

     (c)  The description of the Common Stock of the Company contained in the 
          Company's Registration Statement on Form 8-A, filed on May 19, 
          1993, including any amendment or reports filed for the purpose of 
          updating such description.

     All documents filed by the Company pursuant to Sections 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 of the securities offered hereby 
shall be deemed incorporated by reference into this Prospectus and to be a 
part hereof from the date of filing such documents. Any statement contained 
in any 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 other 
subsequently filed document which also is or is deemed to be incorporated by 
reference herein) modifies or supersedes such statement. Any such statement 
so modified or superseded shall not be deemed, except as so modified or 
superseded, to constitute a part of this Prospectus.

     The Company will provide, without charge, to each person to whom a copy 
of this Prospectus is delivered, upon written or oral request of such person, 
a copy of any or all of the documents which are incorporated herein by 
reference, except for certain exhibits to such documents. Requests should be 
directed to the Company, Five Mountain Road, Framingham, Massachusetts 01701, 
Attention: John B. Green, telephone: (508) 620-9700.

                                        3

<PAGE>

                                  RISK FACTORS

     An investment in the shares of Common Stock being offered hereby 
involves a high degree of risk. Prospective investors should carefully 
consider the following risk factors, in addition to the other information 
contained in this Prospectus, before purchasing the shares of Common Stock 
offered hereby.

     History of Operating Losses; Need for Additional Funds. GTC has had 
operating losses since its inception and expects such losses to continue for 
the next several years. For the period from its inception in 1993 to December 
28, 1997, the Company incurred cumulative losses of approximately $27.3 
million. GTC's losses have resulted principally from costs incurred in 
connection with research activities and from expenses in excess of revenues 
from the Company's contract research organization ("CRO") services. GTC's 
sources of revenues to date have consisted primarily of research and 
development contracts and CRO services. Such revenues to date have not been 
sufficient to generate profits. The Company expects to continue to incur 
significant operating losses until such time as product sales and CRO service 
revenues are sufficient to fund its operations. No assurance can be given 
that the Company will become profitable.

     The Company currently believes that existing cash resources and 
available financing will be sufficient to meet its operating cash flow needs 
and capital requirements at least through the end of 1998. The development of 
transgenic products by the Company will require the commitment of substantial 
resources to conduct costly and time-consuming research, preclinical testing 
and clinical trials necessary to bring such products to market. If GTC's 
businesses do not achieve profitable operations at or prior to the time such 
existing resources are exhausted, the Company will need to obtain additional 
financing, through public or private financings, including debt or equity 
financings, or through collaborative or other arrangements with corporate 
partners, as appropriate. Adequate funds for the Company's operations from 
such sources may not be available when needed or on terms acceptable to the 
Company. If additional financing cannot be obtained when needed or on 
acceptable terms, GTC could be forced to delay, scale back or eliminate 
certain of its research and development programs or to license to other 
parties rights to commercialize products or technologies that the Company 
would otherwise seek to develop internally as well as delaying or foregoing 
timely expansion, improvement or investment in the Company's contract 
research services.

     The foregoing forward-looking statements regarding the Company's 
expectations of the need for additional funds are subject to risks and 
uncertainties. The Company's cash requirements may vary materially from those 
now planned, depending upon the results of existing businesses, the terms of 
future collaborations, results of research and development, competitive and 
technological advances, regulatory requirements and other factors.

     Early Stage of Transgenic Technology. Development of products based on 
transgenic technology is subject to a number of significant technological 
risks and the time period required for any such development is both lengthy 
and uncertain. Neither GTC nor, to GTC's knowledge, any other entity has 
completed human clinical trials of any protein produced in the milk of 
transgenic animals, and there can be no assurance that GTC will be able to do 
so successfully. There can be no assurance that any transgenically produced 
protein will be safe or effective. All of the proteins that GTC is developing 
will require significant additional research, development and testing and 
will require the expenditure of substantial additional capital prior to their 
commercialization. In addition, there can be no assurance that research and 
discoveries by others will not render GTC's technology obsolete or 
noncompetitive.

     No Assurance of Commercial Success of Transgenic Products. The 
successful commercialization of any transgenic protein product by the Company 
will depend on many factors, including the successful completion of clinical 
testing, the response of medical professionals to the data from clinical 
trials, the Company's ability to create or access a sales force able to 
market such transgenic products, the Company's ability to supply a sufficient 
amount of product to meet market demand, the degree to which third-party 
reimbursement for use of such product is available and the number and 
relative efficacy of competitive products that may subsequently enter the 
market, as well as, with respect to transgenic products designed to replace 
or supplement products currently being marketed, the relative 
cost-effectiveness of the transgenic products. There can be no assurance that 
the Company or its collaborative partners will be successful in efforts to 
develop and implement a commercialization strategy for any such products.

                                        4

<PAGE>

     GTC does not currently have a sales force to market any transgenic 
products it may develop. The Company anticipates that, for products it 
develops independently, it will enter into marketing arrangements with larger 
pharmaceutical or biotechnology companies which have established sales forces 
that are able to market such products. There can be no assurance that any 
marketing or distribution arrangements will be available on acceptable terms 
or that, in the alternative, GTC will be able to establish its own sales 
force successfully. Unforeseen delays in this process may have an adverse 
effect on the commercialization of any of the Company's products.

     Third-party payors are increasingly attempting to contain health care 
costs by limiting both coverage and the level of reimbursement for new 
therapeutic products. The successful commercialization of any products 
developed by the Company may depend on obtaining coverage and reimbursement 
for the use of these products from third-party payors.

     In addition, the successful commercialization of the Company's products 
will require that medical professionals become convinced of the efficacy of 
the products in treating a particular condition and incorporate such products 
as standard practice in relevant therapeutic protocols. There can be no 
assurance that any transgenic product developed by GTC will be accepted by 
the medical profession.

     Government Regulation. Transgenic products will require approval by the 
U.S. Food and Drug Administration ("FDA") prior to marketing in the United 
States. In addition, the manufacturing and marketing of such products, and 
certain areas of research related to them, are subject to regulations by 
other U.S. governmental authorities including the United States Department of 
Agriculture (the "USDA") and the Environmental Protection Agency (the "EPA"). 
Comparable authorities are involved in other countries.

     In cases where the Company expects to obtain revenue from the sale of 
transgenic products, whether through direct sales, marketing relationships 
with others or royalty arrangements, the Company will incur the risk of such 
product failing to satisfy applicable regulatory requirements prior to 
marketing. The approval process involves two parts, governing first the 
approval of an individual pharmaceutical product as safe and effective and 
second the approval of the manufacturing process as complying with applicable 
FDA current good manufacturing practices regulations ("GMPs"). In 1995, the 
FDA and comparable European regulatory authorities issued guidelines 
regarding the production of therapeutic proteins in transgenic animals. While 
the FDA's guidelines, known as Points to Consider guidelines ("Points to 
Consider"), cover issues specific to transgenic production, the basic 
regulatory framework for FDA approval will also apply to transgenic 
therapeutic products submitted for approval. To GTC's knowledge, no protein 
produced in the milk of a transgenic animal has been submitted for regulatory 
approval in the United States or elsewhere.

     The FDA and comparable agencies in foreign countries impose substantial 
requirements upon the introduction of therapeutic pharmaceutical products 
through lengthy and detailed laboratory and clinical testing procedures, 
sampling activities and other costly and time-consuming procedures. 
Satisfaction of these requirements typically takes several years or more and 
can vary substantially based upon the type, complexity and novelty of the 
product. With respect to therapeutic products, the standard FDA approval 
process includes preclinical laboratory and animal testing, submission of an 
IND to the FDA, appropriate human clinical trials to establish safety and 
effectiveness and submission of either a Biologics License Application or a 
New Drug Application ("NDA") prior to market introduction. With respect to 
obtaining approval for the production facilities to be used in producing a 
therapeutic product, the Company expects to be subject to both the 
requirements for establishment license applications and the Points to 
Consider issued with respect to transgenic recombinant products.

     The effect of government regulation may be to delay marketing of the 
Company's products for a considerable or indefinite period of time, impose 
costly procedural requirements upon the Company's activities and may furnish 
a competitive advantage to larger companies or companies more experienced in 
regulatory affairs. There can be no assurance that the FDA or other 
regulatory approvals for any products developed by the Company will be 
granted on a timely basis or at all. Any delay in obtaining or any failure to 
obtain such approvals could adversely affect the Company's ability to 
generate revenue. Even if initial regulatory approvals for the Company's 
product candidates are obtained, the Company, its products and its transgenic 
manufacturing processes would be subject to continual review and periodic 
inspection. There can be no assurance that the FDA will permit the marketing 
of any transgenic product for any particular indication, if at all.

                                        5
<PAGE>

     The Company's operations are also subject to federal, state and local 
laws, rules, regulations and policies governing the use, generation, 
manufacture, storage, air emission, effluent discharge, handling and disposal 
of certain materials and waste, including but not limited to animal waste and 
waste water.

     Dependence of Testing Services on Current Government Regulatory 
Requirements. The market for GTC's preclinical testing services is dependent 
upon the maintenance of strict standards for the conduct of laboratory and 
clinical tests and related procedures which are promulgated by governmental 
entities responsible for public health and welfare, including the FDA, and by 
regulatory authorities in foreign countries. The process of obtaining these 
approvals varies according to the nature and use of the product and routinely 
involves lengthy and detailed laboratory and clinical testing and other 
costly and time-consuming procedures. The Company offers the customers of its 
preclinical testing and development services the necessary expertise to 
comply with these complex regulations. If the regulatory structure were to 
change in a way which reduced the need for such services, the Company could 
be materially adversely affected.

     Dependence on Genzyme. GTC has entered into a number of contractual 
agreements with Genzyme regarding technology and product development and 
other matters, as discussed below:

     Under a research and development agreement, Genzyme is obligated to use 
commercially reasonable efforts to perform purification services for GTC. GTC 
does not currently have personnel capable of undertaking such purification 
services. Until such time, if ever, as GTC develops its own capabilities in 
this regard, there can be no assurance that Genzyme will be able to provide 
such services when and as required by GTC or that GTC would be able to obtain 
comparable services elsewhere.

     Under a collaboration agreement, Genzyme has agreed to provide funding 
for transgenic AT-III development in exchange for co-marketing rights to 
AT-III in all territories other than Asia. The term of the agreement is 
perpetual, except that either party may terminate the agreement for certain 
material breaches, failure to make payments, and either upon the grant, or 
certain absences of a grant, by the FDA of a license to market an AT-III 
product. There can be no assurance, should the agreement terminate before 
completion of the development of an AT-III product, that Genzyme and GTC 
could reach an agreement to extend Genzyme's development funding, that the 
Company would be able to fund such program on its own or that the Company 
would be able to obtain such funding from a third party on acceptable terms, 
if at all.

     Under a services agreement, GTC pays Genzyme a fixed monthly fee for 
basic laboratory and administrative support services provided by Genzyme. The 
monthly fee is adjusted annually, based on the services to be provided and 
changes in Genzyme's cost of providing the services. The services agreement 
is self-renewing annually and may be terminated upon 90 days notice by either 
party to the other party. There can be no assurance, should the agreement 
terminate, that GTC would be able to renegotiate a new agreement or obtain 
the provision of substitute services from a third party on acceptable terms, 
if at all.

     In 1995, GTC obtained a credit line and a term loan with a commercial 
bank, each secured by Genzyme's guaranty of the Company's obligations 
thereunder. GTC has agreed to reimburse Genzyme for any liability Genzyme may 
incur under such guaranty and has granted Genzyme a first lien on all of 
GTC's assets to secure such obligation. The various loan documents provide 
that if GTC or Genzyme breach certain financial covenants, the bank may 
refuse to extend further credit as well as accelerate outstanding 
indebtedness. There can be no assurance, in the event Genzyme or GTC breaches 
such financial covenants, that GTC will be able to meet any repayment demands 
upon acceleration or to make new arrangements with the bank, Genzyme and/or 
any third parties to provide for a replacement extension of credit on 
acceptable terms, if at all.

     In March 1996, GTC entered into the Genzyme Credit Line Agreement with 
Genzyme (the "Genzyme Credit Line") under which Genzyme agreed to provide a 
revolving line of credit in the amount of $10 million. During 1996, 
$1,673,000 of debt was converted into 219,565 shares of common stock, leaving 
$8,327,000 available on the revolving line of credit. In September 1997, GTC 
and Genzyme amended the terms of the $8.3 million Genzyme Credit Line. The 
expiration date of the revolving credit line was extended to March 31, 2000, 
with an option, at that date, for GTC to convert the outstanding

                                        6

<PAGE>

balance to a three-year term loan. As a result of the issuance of the 
Preferred Stock in the private placement of March 1998, the amount of the 
credit line was reduced by approximately $1.9 million. There can be no 
assurance, upon the termination of the credit line, that GTC will be able to 
negotiate an extension or replacement of the line of credit, if necessary, 
with Genzyme or a third party on acceptable terms, if at all.

     Potential Conflicts of Interest with Genzyme. Genzyme is the largest 
single stockholder of GTC. Assuming exercise of a currently exercisable 
warrant for 145,000 shares of Common Stock, Genzyme beneficially owns 
approximately 44% of the outstanding Common Stock of GTC. Genzyme's ownership 
interest gives it significant influence over any election of directors and 
any other action requiring approval by the holders of a majority of the 
Common Stock. Three members of GTC's Board of Directors also serve as 
directors and/or executive officers of Genzyme. The interests of Genzyme on 
the one hand and GTC on the other hand may, from time to time, differ.

     Dependence on Collaborators. The success of GTC's transgenic protein 
production business will depend, in large part, on GTC's ability to enter 
into arrangements with biotechnology and pharmaceutical companies for the 
transgenic production of proteins to which such companies have proprietary 
rights or to fund the development of transgenic proteins which are in the 
public domain or the subject of expiring patents. To date, the scope of these 
agreements has generally been limited to demonstrating the feasibility of 
transgenic production of targeted proteins in particular animal species. 
There can be no assurance that these feasibility studies will be successful 
or lead to agreements for the commercial production of any proteins. 
Depending upon the terms of any future collaborations, the Company's role in 
such collaborations may be limited to the production aspects of the proteins 
under development. As a result, GTC may also be dependent on collaborators 
for other aspects of the development, preclinical and clinical testing, 
regulatory approval and commercialization of any transgenic product.

     Uncertainty Regarding Patents and Proprietary Technology. GTC has relied 
upon trade secrets, proprietary know-how and continuing technological 
innovation to develop and maintain its competitive position and to protect 
its proprietary technology. In part, these legal rights are protected by 
contracts with employees, consultants and business partners. There can be no 
assurance that trade secrets possessed by GTC will be maintained, that 
secrecy obligations will be honored or that others will not independently 
develop similar or superior technology. There is no assurance that patent 
applications filed by GTC will result in patents being issued or that any 
patents issued to or licensed by GTC will be held valid. The Company may also 
be subject to claims that result in the revocation of patent rights 
previously licensed to GTC as a result of which the Company may be required 
to obtain licenses from others to continue to develop, test or commercialize 
its products. There can be no assurance that GTC will be able to obtain such 
licenses on acceptable terms, if at all. In addition, there may be pending or 
issued patents held by parties not affiliated with GTC that relate to the 
technology utilized by GTC. As a result, GTC may need to acquire licenses to, 
or contest the validity of, such patents or any other similar patents which 
may be issued. GTC could incur substantial costs in defending itself against 
challenges to patent or infringement claims made by third parties or in 
enforcing any patent rights of its own. The loss or exposure of trade secrets 
possessed by GTC could also adversely affect its business.

     Competition. The industries in which GTC operates are highly competitive 
and may become even more competitive. It will be necessary for GTC to 
continue to devote substantial efforts and expense to research, development, 
sales and marketing in order to maintain a competitive position. There can be 
no assurance that developments by others will not render GTC's current and 
proposed services, products or technologies obsolete. In addition, GTC may 
encounter significant competition for protein development and production 
contracts from other companies. Transgenic products may face significant 
competition from biological products manufactured in cell culture or derived 
from human serum or tissue or animal serum or tissue. GTC's business will 
compete both against other companies whose business is dedicated to offering 
transgenic production or preclinical testing and development as a service and 
with prospective customers or collaborators who decide to pursue such 
transgenic production or preclinical testing and development internally.

     Risk of Service or Product Liability. GTC's business exposes it to 
potential product and professional liability risks which are inherent in the 
testing, production, marketing and sale of human therapeutic products. While 
GTC has obtained product and professional liability insurance under an 
insurance policy arrangement with Genzyme and Genzyme's affiliates, there can

                                        7

<PAGE>

be no assurance that such insurance will be sufficient to cover any claim. 
Uninsured product or service liability could have a material adverse effect 
on the financial results of GTC. In addition, there can be no assurance that 
any insurance will provide GTC with adequate protection against potential 
liabilities. Potential liability also may arise from the handling by GTC of 
clinical samples containing human blood and tissues, which may contain human 
pathogens; liability may also arise from handling animal blood and tissue 
which may contain zoonotic pathogens. Although such products are used only in 
the laboratory, inadvertent human contact may occur.

     Retention of Key Personnel. Although GTC believes that the size and 
qualifications of its current staff are adequate for its current business, 
the Company must continue to attract and retain qualified scientific, 
technical, marketing and management personnel as its business expands. There 
is intense competition for qualified personnel in the areas of the Company's 
activities, and there can be no assurance that GTC will be able to continue 
to attract and retain the qualified personnel necessary for the development 
of its business. Loss of the services of, or failure to recruit, key 
scientific and technical personnel could have a material adverse effect on 
GTC's business.

     Public Concerns. Certain of GTC's activities involve animal testing and 
genetic engineering in animals. Such activities have been the subject of 
controversy and adverse publicity. Animal rights groups and various other 
organizations and individuals have attempted to stop animal testing and 
genetic engineering activities by pressing for legislation and regulation in 
these areas. To the extent the activities of such groups are successful, 
GTC's business may be adversely affected.

     Shares Eligible for Future Sale. Sales of substantial amounts of Common 
Stock in the public market, or the perception that such sales may occur, 
could adversely affect the prevailing market price of the Common Stock. As of 
July 1, 1998, there were 18,474,249 shares of Common Stock outstanding. As of 
July 1, 1998, options to purchase an aggregate of 2,129,732 shares of 
Common Stock at varying exercise prices were outstanding; of such total, 
options for 1,494,484 shares were immediately exercisable and such shares 
could be immediately resold into the public market. All of the 7,428,365 
shares held by Genzyme could be sold into the public markets upon compliance 
with Rule 144. The 145,000 shares issuable to Genzyme upon exercise of an 
outstanding warrant are entitled to registration rights, which could expedite 
the resale of such shares into the public market. Another 210,600 shares of 
Common Stock are reserved for issuance upon exercise of outstanding warrants, 
all of which are currently exercisable. Furthermore, in connection with a 
private placement in March 1998, 3,599,138 shares of Common Stock are 
reserved for issuance, and have been registered for resale, upon (i) exercise 
of currently exercisable warrants for 450,000 shares of Common Stock and (ii) 
conversion of 20,000 shares of Preferred Stock, currently convertible into 
1,374,569 shares of Common Stock. Approximately twice the number of shares 
currently issuable upon conversion of the securities issued in the March 1998 
private placement were registered because on and after December 21, 1998 the 
conversion price per share of the preferred stock shall become the lower of 
(i) $14.55 and (ii) the average closing price of the Company's Common Stock 
as quoted by the Nasdaq National Market for any five trading days, selected 
by the holder, during the twenty trading days immediately preceding the date 
of conversion. As a result, the number of shares of Common Stock issuable 
upon conversion of the preferred stock may increase above, but will not 
decrease below, 1,374,569 shares. Lastly, an indeterminate amount of shares 
are registered for issuance and sale by the Company on a continuous basis at 
a maximum aggregate offering price of $12,000,000, of which, to date, 603,300 
shares have been sold at an aggregate purchase price of $6,515,640.

     Possible Volatility of Stock Price; Absence of Dividends. There has been 
a history of significant volatility in the market prices of publicly-traded 
common stock of companies engaged in applications of biotechnology, including 
the Company, and the market price of the Common Stock has been and may 
continue to be highly volatile. Announcements of technological innovations or 
new products by GTC or others, developments or disputes concerning patents or 
proprietary rights, publicity regarding actual or potential medical results 
relating to products under development by GTC or its competitors, regulatory 
developments, period-to-period fluctuations in GTC's financial results and 
general economic and market conditions, among other things, may have a 
significant impact on the market price of the Common Stock. GTC has not paid 
any dividends since its inception and does not intend to pay any dividends in 
the foreseeable future.

                                       8

<PAGE>

     Change in Control. Certain provisions of Massachusetts law and of GTC's 
charter documents could have the effect of discouraging others from 
attempting hostile takeovers of GTC. Such provisions may also have the effect 
of preventing changes in the management of GTC. It is possible that such 
provisions could make it more difficult to accomplish transactions which 
stockholders may deem to be in their best interests.

                                   THE COMPANY

     GTC is engaged in the application of transgenic technology to the 
development and production of recombinant proteins for therapeutic and 
diagnostic uses. GTC produces such proteins by inserting a gene that directs 
the production of a desired protein into the genetic material of an animal 
such that the target protein is secreted in the milk of female offspring. GTC 
believes that transgenic production offers significant economic and 
technological advantages relative to traditional protein production systems. 
GTC intends to develop and produce a broad range of proteins, both in 
collaboration with pharmaceutical and biotechnology companies and 
independently.

     Through a wholly-owned subsidiary, Primedica Corporation, GTC also 
provides preclinical testing services to pharmaceutical, biotechnology, 
medical device and chemical companies. Such services help Primedica's 
customers reduce the time and cost of bringing their products to market.

     GTC's principal executive offices are located at Five Mountain Road, 
Framingham, Massachusetts 01701, and its telephone number at that location is 
(508) 620-9700.

                               SELLING STOCKHOLDER

     All 48,284 shares offered hereby are held of record by the Putnam 
Fiduciary Trust Company, as trustee of the Plan. Prior to this offering, the 
Selling Stockholder is the owner of record of 214,576 shares of the Company's 
Common Stock.

                              PLAN OF DISTRIBUTION

     The Company has filed with the Commission a Registration Statement on 
Form S-3 (the "Registration Statement") under the Securities Act of 1933, as 
amended (the "Securities Act"), of which this Prospectus forms a part, with 
respect to the resale of the Shares from time to time by the Selling 
Stockholder in open-market or privately-negotiated transactions. The Company 
has agreed to keep the Registration Statement effective until the earlier of 
(i) the date on which the Selling Stockholder no longer holds any of the 
shares of Common Stock offered hereby and (ii) the first anniversary of the 
effective date of the Registration Statement.

     The Company has been advised that the Selling Stockholder may sell the 
Shares at market prices prevailing at the time of sale, at prices related to 
such prevailing market prices or at negotiated prices. The Selling 
Stockholder may effect such transactions by selling the Shares to or through 
broker-dealers and such broker-dealers may receive compensation in the form 
of discounts, concessions or commissions from the Selling Stockholder or the 
purchasers of the Shares for whom such broker-dealers may act as agent or to 
whom they sell as principal, or both (which compensation to a particular 
broker-dealer might be in excess of customary commissions). The Selling 
Stockholder will be responsible for all brokerage commissions and other 
amounts payable with respect to any sale of Shares with respect to the 
Selling Stockholder.

     The Selling Stockholder and any broker-dealers who act in connection 
with the sale of Shares hereunder may be deemed to be "underwriters," as such 
term is defined in the Securities Act, and any commissions received by them 
or profit on any resale of the Shares as principal might be deemed to be 
underwriting discounts and commissions under the Securities Act.

                                        9

<PAGE>

                           LEGALITY OF COMMON STOCK

     The validity of the securities offered hereby will be passed upon for 
the Company by Palmer & Dodge LLP, Boston, Massachusetts. Lynnette C. Fallon, 
a partner of Palmer & Dodge LLP, is the Clerk of the Company.

                                     EXPERTS

     The consolidated balance sheets of the Company as of December 28, 1997 
and December 29, 1996 and the related consolidated statements of operations, 
cash flows and changes in shareholders' equity for each of the three fiscal 
years in the period ended December 28, 1997 appearing in the Company's Annual 
Report on Form 10-K for the year ended December 28, 1997 have been audited by 
PricewaterhouseCoopers LLP, independent accountants, as set forth in their 
report included therein and incorporated herein by reference. Such 
consolidated financial statements of the Company are referred to above and 
incorporated herein by reference in reliance upon such reports given upon the 
authority of that firm as experts in accounting and auditing.

                                       10

<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution

    The expenses to be borne by the Company in connection with the securities 
being registered are as follows:

<TABLE>
<CAPTION>

           <S>                                                   <C> 
           SEC registration fee........................          $  105
           Nasdaq listing fee..........................           2,000
           Accounting fees and expenses................           2,500
           Legal fees and expenses.....................           2,500
           Printing and photocopying expenses..........             500
           Miscellaneous expenses......................             500
                                                                 ------

                Total..................................          $8,105
                                                                 ------
                                                                 ------
</TABLE>

     All of the above figures, except the SEC registration and Nasdaq listing 
fees, are estimates.

Item 15.  Indemnification of Directors and Officers

     Section 67 of chapter 156B of the Massachusetts Business Corporation Law 
grants the Company the power to indemnify any director, officer, employee or 
agent to whatever extent permitted by the Company's Restated Articles of 
Organization, Bylaws or a vote adopted by the holders of a majority of the 
shares entitled to vote thereon, unless such indemnitee has been adjudicated 
in any proceeding not to have acted in good faith in the reasonable belief 
that his or her actions were in the best interests of the corporation or, to 
the extent that the matter for which indemnification is sought relates to 
service with respect to an employee benefit plan, in the best interests of 
the participants or beneficiaries of such employee benefit plan. Such 
indemnification may include payment by the Company of expenses incurred in 
defending a civil or criminal action or proceeding in advance of the final 
disposition of such action or proceeding, upon receipt of an undertaking by 
the person indemnified to repay such payment if he or she shall be 
adjudicated to be not entitled to indemnification under the statute.

     Article VI of the Company's Bylaws provides that the Company shall, to 
the extent legally permissible, indemnify each person who may serve or who 
has served at any time as a director or officer of the corporation or of any 
of its subsidiaries, or who, at the request of the Company, may serve or at 
any time has served as a director, officer or trustee of, or in a similar 
capacity with, another organization or an employee benefit plan, against all 
expenses and liabilities (including counsel fees, judgments, fines, excise 
taxes, penalties and amounts payable in settlements) reasonably incurred by 
or imposed upon such person in connection with any threatened, pending or 
completed action, suit or other proceeding, whether civil, criminal, 
administrative or investigative, in which he or she may become involved by 
reason of his or her serving or having served in such capacity (other than a 
proceeding voluntarily initiated by such person unless he or she is 
successful on the merits, the proceeding was authorized by the corporation or 
the proceeding seeks a declaratory judgment regarding his or her own 
conduct). Such indemnification shall include payment by the Company of 
expenses incurred in defending a civil or criminal action or proceeding in 
advance of the final disposition of such action or proceeding, upon receipt 
of an undertaking by the person indemnified to repay such payment if he or 
she shall be adjudicated to be not entitled to indemnification under Article 
VI, which undertaking may be accepted without regard to the financial ability 
of such person to make repayment.

     The indemnification provided for in Article VI is a contract right 
inuring to the benefit of the directors, officers and others entitled to 
indemnification. In addition, the indemnification is expressly not exclusive 
of any other rights to which such director, officer or other person may be 
entitled by contract or otherwise under law, and inures to the benefit of the 
heirs, executors and administrators of such a person.

                                      II-1

<PAGE>

Item 16. Exhibits

     See the Exhibit Index immediately following the signature page.

Item 17.  Undertakings

     (a) The undersigned registrant hereby undertakes as follows:

          (1) To file, during any period in which offers or sales are being 
made, a post-effective amendment to this Registration Statement:

            (i)  to include any prospectus required by Section 10(a)(3) of 
the Securities Act;

            (ii) to reflect in the prospectus any facts or events arising 
after the effective date of this Registration Statement (or the most recent 
post-effective amendment hereof) which, individually or in the aggregate, 
represent a fundamental change in the information set forth in this 
Registration Statement;

            (iii) to include any material information with respect to the 
plan of distribution not previously disclosed in the registration statement 
or any material change to such information in this Registration Statement;

          provided, however, that no filing will be made pursuant to 
paragraph (a)(1)(i) or (a)(1)(ii) if the information required to be included 
in a post-effective amendment by those paragraphs is contained in periodic 
reports filed by the Registrant pursuant to Section 13 or 15(d) of the 
Exchange Act that are incorporated by reference in this Registration 
Statement.

          (2) That, for the purpose of determining any liability under the 
Securities Act, each such post-effective amendment shall be deemed to be a 
new registration statement relating to the securities offered therein, and 
the offering of such securities at that time shall be deemed to be the 
initial bona fide offering thereof.

          (3) To remove from registration by means of a post-effective 
amendment any of the securities being registered which remain unsold at the 
termination of this offering.

     (b) The undersigned hereby undertakes that, for purposes of determining 
any liability under the Securities Act, each filing of the registrant's 
annual report pursuant to section 13(a) or section 15(d) of the Exchange Act 
that is incorporated by reference in this Registration Statement shall be 
deemed to be a new registration statement relating to the securities offered 
therein, and the offering of such securities at that time shall be deemed to 
be the initial bona fide offering thereof.

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

                                     II-2

<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, 
the registrant certifies that it has reasonable grounds to believe that it 
meets all of the requirements for filing on Form S-3 and has duly caused this 
registration statement to be signed on its behalf by the undersigned, 
thereunto duly authorized, in the Town of Framingham, Commonwealth of 
Massachusetts, on July 16, 1998.


                                     GENZYME TRANSGENICS CORPORATION



                                     By:  /s/ Sandra Nusinoff Lehrman
                                        -------------------------------------
                                        Dr. Sandra Nusinoff Lehrman
                                        President and Chief Executive Officer

                                POWER OF ATTORNEY

     We, the undersigned officers and directors of Genzyme Transgenics 
Corporation, hereby severally constitute and appoint Sandra Nusinoff Lehrman, 
John B. Green and Lynnette C. Fallon, and each of them singly, our true and 
lawful attorneys-in-fact, with full power to them in any and all capacities, 
to sign any amendments to this Registration Statement on Form S-3 (including 
any post-effective amendments thereto), and to file the same, with exhibits 
thereto and other documents in connection therewith, with the Securities and 
Exchange Commission, hereby ratifying and confirming all that each of said 
attorneys-in-fact may do or cause to be done by virtue hereof.

     Witness our hands and common seal on the dates set forth below.

     Pursuant to the requirements of the Securities Act of 1933, as amended, 
this registration statement has been signed below by the following persons in 
the capacities and on the dates indicated.

<TABLE>
<CAPTION>

             Signature                                        Title                                      Date
             ---------                                        -----                                      ----
<S>                                               <C>                                                    <C>
/s/ Sandra Nusinoff Lehrman 
- --------------------------------------------      President and Chief Executive Officer                  July 16, 1998
Sandra Nusinoff Lehrman                               (Principal Executive Officer)


/s/ John B. Green 
- --------------------------------------------     Vice President, Chief Financial Officer                 July 16, 1998
John B. Green                                                 and Treasurer
                                                       (Principal Financial Officer
                                                    and Principal Accounting Officer)


- --------------------------------------------              Chairman of the Board                          July 16, 1998
James A. Geraghty
</TABLE>


                                      II-3

<PAGE>

<TABLE>
<CAPTION>

             Signature                                        Title                                      Date
             ---------                                        -----                                      ----
<S>                                               <C>                                                    <C>

/s/ Robert W. Baldridge 
- --------------------------------------            Director                                               July 16, 1998
Robert W. Baldridge

/s/ Henry E. Blair  
- --------------------------------------            Director                                               July 16, 1998
Henry E. Blair

/s/ Francis J. Bullock 
- --------------------------------------            Director                                               July 16, 1998
Francis J. Bullock

/s/ Alan E. Smith 
- --------------------------------------            Director                                               July 16, 1998
Alan E. Smith

/s/ Henri A. Termeer 
- --------------------------------------            Director                                               July 16, 1998
Henri A. Termeer

/s/ Alan W. Tuck 
- --------------------------------------            Director                                               July 16, 1998
Alan W. Tuck
</TABLE>

                                      II-4

<PAGE>

                                  Exhibit Index
                                  -------------

<TABLE>
<CAPTION>

Number                              Description
- ------                              -----------
<S>      <C>
4.1.1    Restated Articles of Organization of the Company, filed with the 
         Secretary of the Commonwealth of Massachusetts on December 27, 1993. 
         Filed as Exhibit 3.1 to the Company's Annual Report on Form 10-K for 
         the year ended December 31, 1993 and incorporated herein by 
         reference.

4.1.2    Articles of Amendment to the Restated Articles of Organization filed 
         with the Secretary of the Commonwealth of Massachusetts on October 
         3, 1994. Filed as Exhibit 3.1.2 to the Company's Annual Report on 
         Form 10-K for the year ended December 28, 1997 and incorporated 
         herein by reference.

4.1.3    Articles of Amendment to the Restated Articles of Organization of 
         the Company filed with the Secretary of the Commonwealth of 
         Massachusetts on June 26, 1997. Filed as Exhibit 3 to the Company's 
         Quarterly Report on Form 10-Q for the quarter ended June 29, 1997 
         and incorporated herein by reference.

4.1.4    Certificate of Vote of Directors Establishing a Series of a Class of 
         Stock (Series A Convertible Preferred Stock). Filed as Exhibit 3.1.4 
         to the Company's Annual Report on Form 10-K for the year ended 
         December 28, 1997 and incorporated herein by reference.

4.2      By-Laws of the Company, as amended.  Filed as Exhibit 3.2 to the 
         Company's Registration Statement on Form S-1, File No. 33-62782, and 
         incorporated herein by reference.

4.3      Specimen Common Stock Certificate.  Filed as Exhibit 4.1 to the 
         Company's Registration Statement on Form S-1, File No. 33-62782, and 
         incorporated herein by reference.

4.4      Specimen Series A Convertible Preferred Stock Certificate. Filed as
         Exhibit 4.2 to the Company's Annual Report on Form 10-K for the year
         ended December 28, 1997 and incorporated herein by reference.

4.5.1    TSI Specimen Warrant Certificate.  Filed as Exhibit 4.8 to TSI 
         Corporation's Registration Statement on Form S-3,
         File No. 33-48107, and incorporated herein by reference.

4.5.2    Form of Notice of Assumption by GTC of the TSI warrants to which 
         Exhibit 4.2.1 to this Report relate. Filed as Exhibit 4.2.2 to the 
         original filing of the Company's Annual Report on Form 10-K for the 
         year ended December 31, 1994 and incorporated herein by reference.

4.6.1    TSI Common Stock Purchase Warrant No. F-1 issued to The First 
         National Bank of Boston ("FNBB") on October 28, 1993. Filed as 
         Exhibit 4.6 to the Company's Registration Statement on Form S-4, 
         File No. 33-80924, and incorporated herein by reference.

4.6.2    TSI Common Stock Purchase Warrant No. G-1, dated September 27, 1994, 
         issued to Financing for Science International, Inc. ("FSI"). Filed 
         as Exhibit 4.4 to the original filing of the Company's Annual Report 
         on Form 10-K for the year ended December 31, 1994 and incorporated 
         herein by reference.

4.6.3    Form of Notice of Assumption by GTC of the TSI Common Stock Purchase 
         Warrants Nos. F-1 and G-1. Filed as Exhibit 4.5 to the original 
         filing of the Company's Annual Report on Form 10-K for the year 
         ended December 31, 1994 and incorporated herein by reference.

4.7      Common Stock Purchase Warrant, dated June 30, 1995, issued to FSI. 
         Filed as Exhibit 10.9 to the Company's Quarterly Report on Form 10-Q 
         for the period ended July 2, 1995 and incorporated herein by 
         reference.
</TABLE>
                                      II-5


<PAGE>

<TABLE>
<CAPTION>

Number                              Description
- ------                              -----------
<S>      <C>
4.8      Common Stock Purchase Warrant, dated July 3, 1995, issued to 
         Genzyme. Filed as Exhibit 10.5 to the Company's Quarterly Report on 
         Form 10-Q for the period ended July 2, 1995 and incorporated herein 
         by reference.

4.9      Common Stock Purchase Warrant, dated March 13, 1996, issued to FSI. 
         Filed as Exhibit 4.8 to the Company's Quarterly Report on Form 10-K 
         for the year ended December 31, 1995 and incorporated herein by 
         reference.

4.10     Common Stock Purchase Warrant, dated as of June 26, 1997, issued to 
         Government Land Bank d/b/a The MassDevelopment. Filed as Exhibit 4 
         to the Company's Quarterly Report on Form 10-Q for the quarter ended 
         June 29, 1997 and incorporated herein by reference.

4.11     Form of Common Stock Purchase Warrant issued to the Purchasers of 
         Series A Convertible Preferred Stock, dated as of March 20, 1998, 
         together with a schedule of holders. Filed as Exhibit 4.9 to the 
         Company's Annual Report on Form 10-K for the year ended December 28, 
         1997 and incorporated herein by reference.

4.12     Form of Common Stock Purchase Warrant issued to Shoreline Pacific 
         Institutional Finance and affiliates, dated as of March 20, 1998. 
         Filed as Exhibit 4.10 to the Company's Annual Report on Form 10-K 
         for the year ended December 28, 1997 and incorporated herein by 
         reference.

4.13     Registration Rights Agreement between the Company and certain 
         Stockholders named therein. Filed as Exhibit 10.53 to the Company's 
         Annual Report on Form 10-K for the year ended December 28, 1997 and 
         incorporated herein by reference.

4.14     Securities Purchase Agreement, dated as of March 20, 1998, between 
         the Company and certain purchasers named therein. Filed as Exhibit 
         10.54 to the Company's Annual Report on Form 10-K for the year ended 
         December 28, 1997 and incorporated herein by reference.

5        Opinion of Palmer & Dodge LLP. Filed herewith.

23.1     Consent of counsel (contained in opinion of Palmer & Dodge LLP filed 
         as Exhibit 5).

23.2     Consent of PricewaterhouseCoopers LLP.  Filed herewith.

24       Power of Attorney. Included on signature page to this Registration 
         Statement.
</TABLE>

                                     II-6


<PAGE>

                                                                    EXHIBIT 5

                               PALMER & DODGE LLP
                                One Beacon Street
                           Boston, Massachusetts 02108

Telephone:  (617) 573-0100                          Facsimile:  (617) 227-4420

                                 July 16, 1998

Genzyme Transgenics Corporation
Five Mountain Road
Framingham, Massachusetts  01701


         We are rendering this opinion in connection with the Registration 
Statement on Form S-3 (the "Registration Statement") filed by Genzyme 
Transgenics Corporation (the "Company") with the Securities and Exchange 
Commission under the Securities Act of 1933, as amended, on or about the date 
hereof. The Registration Statement relates to the registration of 48,284 
shares of the Company's Common Stock, $0.01 par value (the "Shares"). We 
understand that the Shares are to be offered and sold in the manner described 
in the Registration Statement.

         We have acted as your counsel in connection with the preparation of 
the Registration Statement and are familiar with the proceedings taken by the 
Company in connection with the authorization and issuance of the Shares. We 
have examined such documents as we consider necessary to render this opinion.

         Based upon the foregoing, we are of the opinion that the Shares have 
been duly authorized and are validly issued, fully paid and nonassessable.

         We hereby consent to the use of our name under the caption "Legal 
Opinions" in the Registration Statement and to the filing of this opinion as 
an exhibit to the Registration Statement.

                                Very truly yours,



                             /s/ Palmer & Dodge LLP
                             ----------------------
                             Palmer & Dodge LLP



<PAGE>


                                                                 EXHIBIT 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS


         We consent to the incorporation by reference in this registration 
statement of Genzyme Transgenics Corporation on Form S-3 to register 48,284 
shares of the Company's common stock of our report dated February 25, 1998, 
except as to the information presented in Note 13, for which the date is 
March 20, 1998, on our audits of the consolidated financial statements of 
Genzyme Transgenics Corporation as of December 28, 1997 and December 29, 1996 
and for each of the three fiscal years in the period ended December 28, 1997, 
which report is included in the Company's 1997 Annual Report on Form 10-K. We 
also consent to the reference to our firm under the caption "Experts."


                                               /s/ PricewaterhouseCoopers LLP
                                               ----------------------------
                                               PricewaterhouseCoopers LLP

Boston, Massachusetts
July 16, 1998




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