OXIGENE INC
S-3/A, 1998-07-09
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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              As filed with the Securities and Exchange Commission
                                 on July 8, 1998

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


                       SECURITIES AND EXCHANGE COMMISSION

                   POST-EFFECTIVE AMENDMENT NO. 3 ON FORM S-3
                                       TO
                                    FORM S-1
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                  OXiGENE, INC.
- --------------------------------------------------------------------------------

             (Exact name of registrant as specified in its charter)

                                    Delaware
- --------------------------------------------------------------------------------

         (State or other jurisdiction of incorporation or organization)

                                   13-3679168
- --------------------------------------------------------------------------------

                      (I.R.S. Employer Identification No.)

          One Copley Place, Suite 602, Boston, MA 02116, (617) 536-9500
- --------------------------------------------------------------------------------



   (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)


            Ms. Katherine Marks, One Copley Place, Suite 602, Boston,
                            MA 02116, (617) 536-9500
- --------------------------------------------------------------------------------

            (Name, Address, including zip code, and telephone number,
                   including area code, of agent for service)

                                 With a copy to:

                             Gerald A. Eppner, Esq.
                          Cadwalader Wickersham & Taft
                                 100 Maiden Lane
                            New York, New York 10038
                                 (212) 504-6000

     Approximate date of commencement of proposed sale to the public:  From time
to time after the effective date of this post-effective amendment.


<PAGE>

     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.    |_|

     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.     |_|  33-64968

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

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

     The registrant  hereby amends this  registration  statement on such date or
dates as may be necessary to delay its effective date until the registrant shall
file a further  amendment  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>


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 JULY ___, 1998
PROSPECTUS

         847,135 Shares of Common Stock Underlying Outstanding Warrants


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

                                  OXiGENE, INC.

     This Prospectus  relates to up to 847,135 shares of Common Stock, par value
$.01 per share  (the  "Common  Stock"),  of  OXiGENE,  Inc.  (the  "Company"  or
"OXiGENE"), that may be issued by the Company upon the exercise of warrants (the
"Warrants") which were included in the Units (the "Units")  originally issued by
the Company  pursuant to a  prospectus  dated  August 26, 1993 (the  "Separation
Date"). The Warrant Agreement,  dated August 26, 1993 (the "Warrant Agreement"),
between the Company and the Warrant  Agent,  pursuant to which the Warrants were
issued,  provided that each Warrant  entitles the holder thereof to purchase one
share of Common Stock for $7.00 during the first year of  exercisability  ending
on the first  anniversary  of the  Separation  Date,  August 26, 1993,  with the
exercise price thereafter  increasing by $2.00 on each annual anniversary of the
Separation Date.

     On August 29, 1994,  the Company and the Warrant  Agent amended the Warrant
Agreement in certain respects.  As so amended,  the Warrant Agreement  currently
provides that each Warrant  entitles the holder thereof to acquire upon exercise
of the Warrant  1.07 shares of Common  Stock at an exercise  price of $14.35 per
share.  No  fractional  shares are to be issued.  Unless  extended,  unexercised
Warrants  were to expire by their  terms at the close of  business on August 26,
1998 (the "Original Expiration Date").

     On July 8, 1998,  the  Company and the  Warrant  Agent  amended the Warrant
Agreement  to provide  that (a) at 5:00  p.m.,  New York City time on August 26,
1998,  with no action  required to be taken by the holders of the Warrants,  the
Original  Expiration  Date will be extended (the  "Extension") to 5:00 p.m., New
York City time,  December 31, 1999 (the  "Amended  Expiration  Date"),  (b) each
Warrant shall be exercisable on and after August 26, 1998, and until the Amended
Expiration Date, for 1.07 shares of Common Stock at a price of $14.35 (i.e., the
exercise price currently in effect),  subject only to adjustment after that date
in  accordance  with the  anti-dilution  provisions  set  forth  in the  Warrant
Agreement  (which are not being  amended) (the "Price  Amendment"),  and (c) the
Company has the right,  but not the  obligation,  at any time after the Original
Expiration Date, to redeem,  at any time or from time to time, any or all of the
Warrants (the "Call" and,  together with the Extension and the Price  Amendment,
the "Amendments");  provided, however, the Company may exercise the Call only if
(i) the average  trading price of the shares of the Company's  Common Stock,  as
reported by the National Market of the NASDAQ Stock Market,  Inc.SM  ("NASDAQ"),
for any period of ten consecutive  trading days (not including any days on which
there  are no  purchases  or sales of Common  Stock  but the  NASDAQ is open for
trading) has traded at not less than $16.00 per share,  and (ii) the Company has
given not less than 20 days written notice to the Warrantholders  indicating the
Company's  election to exercise the Call.  Following a Call,  any Warrants  that
were called that remain  unexercised at the end of the 20-day notice period will
be redeemed  promptly  thereafter  at a  redemption  price of $.001 per Warrant,
payable by the Company in cash.

     The Warrantholders need take no action in connection with the Amendments to
the Warrant Agreement,  which apply to all outstanding Warrants.  Warrantholders
need not turn in the certificates  evidencing their Warrants that do not reflect
the Amendments  (the "Original  Warrant  Certificates")  even after the Original
Expiration Date. However,  after the Original Expiration Date, any Warrantholder
has the right,  but not the  obligation,  at the  Warrantholder's  election,  to
surrender  Original  Warrant  Certificates  to  the  Warrant  Agent  which  will
thereupon be replaced  with  certificates  evidencing  Warrants  containing  the
Amendments (the "Revised Warrant Certificates"). In addition, after the Original
Expiration Date, Revised Warrant  Certificates will be issued in connection with
(a) any transfer of Warrants evidenced by Original Warrant Certificates or (b) a
partial exercise of Warrants evidenced by Original Warrant Certificates.

     Other than the amendments to the Warrant  Agreement  specifically set forth
in  Post-Effective  Amendment  No.  3 on  Form  S-3  to  Form  S-1  Registration
Statement,  of which this  Prospectus is a part,  and other than as set forth in
Post-Effective  Amendment No. 2 on Form S-3 to Form S-1 Registration  Statement,
dated  September  30, 1994,  the Warrant  Agreement  has not been  amended.  The
Company will receive the full proceeds of any exercise of the Warrants.

     The shares of Common  Stock of the Company  are traded on NASDAQ  under the
symbol  "OXGN." The last reported  sale price of the  Company's  Common Stock as
reported by NASDAQ on July 6, 1998 was $11.8125.

     The  Securities  Offered  Hereby  Involve a High Degree of Risk.  See "Risk
Factors" beginning on page 7. 

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

  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 July _____, 1998.



<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 and information statements and other information
with the Securities and Exchange Commission (the "SEC"). Copies of such reports,
proxy and  information  statements  and other  information  can be inspected and
copied at the public  reference  facilities  maintained  by the SEC at Judiciary
Plaza,  450 Fifth  Street,  N.W.,  Washington,  D.C.  20549 and at the following
Regional Offices of the SEC: Suite 1400,  Northwestern  Atrium Center,  500 West
Madison  Street,  14th Floor,  Chicago,  Illinois  60661;  and Seven World Trade
Center,  13th Floor,  New York,  New York 10048.  Copies of such material can be
obtained at prescribed rates from the Public  Reference  Section of the SEC, 450
Fifth  Street,  N.W.,  Washington,  D.C.  20549.  The SEC  maintains  a Web site
(http://www.sec.gov) that contains reports, proxy and information statements and
other  information  regarding  registrants,  such  as  the  Company,  that  File
electronically with the SEC.

     The Company has filed with the SEC a  post-effective  amendment on Form S-3
to a registration  statement  originally  filed on Form S-1  (collectively,  and
together with any amendments  thereto,  the "Registration  Statement") under the
Securities Act of 1933 (the  "Securities  Act"),  with respect to the securities
offered pursuant to this Prospectus (the "Prospectus"),  including the shares of
Common Stock underlying the Warrants described below. This Prospectus is part of
the Registration Statement and does not contain all the information set forth in
the Registration Statement, certain portions of which have been omitted pursuant
to the rules and  regulations  of the SEC. Such  additional  information  may be
obtained  from  the  SEC's  principal  office  in  Washington,  D.C.  Statements
contained in this  Prospectus  or in any document  incorporated  by reference in
this Prospectus as to the contents of any contract or other document referred to
herein or therein are not necessarily  complete,  and in each instance reference
is made to the copy of such  contract or other  document  filed as an exhibit to
the  Registration  Statement or such other  document,  each such statement being
qualified in all respects by such reference.

                            INCORPORATED BY REFERENCE

     This Prospectus  incorporates by reference  certain  documents that are not
presented  herein or delivered  herewith.  These  documents are  available  upon
request from Ms. Katherine Marks,  OXiGENE,  Inc., One Copley Place,  Suite 602,
Boston, MA 02116, telephone (617) 536-9500.

     The Company hereby  undertakes to provide  without charge to each person to
whom a copy of this  Prospectus  has been  delivered,  upon the  written or oral
request of any such person,  a copy of any and all of the documents  referred to
which have been or may be incorporated herein by reference,  other than exhibits
to such documents,  unless such exhibits are specifically incorporated herein by
reference.  Requests  for  such  documents  should  be  directed  to the  person
indicated in the immediately preceding paragraph.

     The following documents, which have been filed with the SEC pursuant to the
Exchange Act, are hereby incorporated by reference herein:

     (a) OXiGENE's  Annual  Report on Form 10-K for the year ended  December 31,
1997 (including all amendments thereto) (the "Annual Report").

     (b)  OXiGENE's  Quarterly  Reports on Form 10-Q for the quarter ended March
31, 1998 (including all amendments thereto).

     All documents  filed by OXiGENE  pursuant to Sections  13(a),  13(c), 14 or
15(d)  of the  Exchange  Act  after  the  date  hereof  shall  be  deemed  to be
incorporated herein by reference and to be a part hereof from the date of filing
of such  documents.  All  information  appearing  in this  Prospectus  or in any
document  incorporated  herein by reference is not  necessarily  complete and is
qualified in its entirety by the information and financial statements (including
notes thereto)  appearing in the documents  incorporated by reference herein and
should be read together with such information and documents.

     Any  statement  contained  in a  document  incorporated  or  deemed  to  be
incorporated  herein by reference  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 that is deemed to be  incorporated
herein by reference 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.

                            FORWARD-LOOKING STATEMENT

     Certain  statements in this  Prospectus  under the captions "The  Company,"
"Use  of  Proceeds,"  "Risk  Factors,"  "Plan  of  Distribution"  and  elsewhere
constitute  "forward-looking  statements"  within  the  meaning  of the  Private
Securities  Litigation  Reform  Act of  1995.  Such  forward-looking  statements
involve known and unknown risks,  uncertainties and other important factors that
could cause the actual  results,  performance or  achievements of the Company to
differ materially from any future results, performance or achievements expressed
or implied by such  forward-looking  statements.  Such risks,  uncertainties and
other important  factors  include,  among others:  general economic and business
conditions;  patent  protection,   enforcement  and  infringement;   proprietary
technology;  industry  trends;  competition;  material  costs and  availability;
ability to develop markets;  changes in business strategy or development  plans;
availability,  terms  and  deployment  of  capital;  availability  of  qualified
personnel;  changes in, or the failure or inability  to comply with,  government
regulation;  ability to develop and test its technology and products; ability to
continue its clinical trial program,  research and development and collaborative
arrangements;  ability to protect the Company's  technology by patents and trade
secrets;  and other factors  referenced in this Prospectus.  See "Risk Factors."
These  forward-looking  statements speak only as of the date of this Prospectus,
and there is no assurance that the forward-looking  information will be accurate
or that the  assumptions  on which they are based will prove to be correct.  The
Company  expressly  disclaims any obligation or  undertaking to disseminate  any
updates  or  revisions  to any  forward-looking  statement  contained  herein to
reflect any change in the  Company's  expectations  with  regard  thereto or any
change in events,  conditions or  circumstances  on which any such  statement is
based.




<PAGE>



                                  RISK FACTORS

     An investment in the shares of Common Stock offered hereby is  speculative,
involves a high  degree of risk and should  only be made by persons or  entities
capable to afford a loss of their  entire  investment.  In addition to the other
information  included elsewhere or incorporated by reference in this Prospectus,
the  following  risk factors  should be  considered  carefully in  evaluating an
investment in the shares of Common Stock offered hereby.

     This   Prospectus   contains,   in  addition  to  historical   information,
forward-looking   statements   that   involve   known  and  unknown   risks  and
uncertainties  that may cause the  Company's  actual  results or  outcomes to be
materially  different from those anticipated and discussed herein.  Factors that
could cause or contribute to such  differences  include those discussed below as
well as those discussed elsewhere in this Prospectus.

     History of Losses and Anticipated Future Financial Results;  Uncertainty of
Future  Profitability.  The Company,  as a  development  stage  enterprise,  has
experienced  net losses every year since its  inception  and, as of December 31,
1997, had a deficit  accumulated  during the development  stage of approximately
$25.5 million. The Company anticipates incurring  substantial  additional losses
over at least the next several  years due to, among other  factors,  the need to
expend  substantial  amounts on its continuing  clinical  trials and anticipated
research and development activities and the general and administrative  expenses
associated with those  activities.  The Company has not commercially  introduced
any product and its products are in varying stages of  development  and testing.
The Company's ability to attain  profitability will depend upon, inter alia, its
ability to develop  products  that are  effective and  commercially  viable,  to
obtain  regulatory  approval for the manufacture and sale of its products and to
license or otherwise market its products successfully. There can be no assurance
that the Company  will ever  achieve  profitability  or that  profitability,  if
achieved, can be sustained on an ongoing basis.

     Early  Stage of Product  Development;  Uncertainties  of  Clinical  Trials;
Unproven  Safety and Efficacy.  The Company's  products are in an early stage of
development.  In order to achieve  profitable  operations on a continuing basis,
the Company,  alone or in collaboration with others, must successfully  develop,
manufacture,  introduce  and market its  products.  The time frame  necessary to
achieve  market success for any  individual  product is long and uncertain.  The
products  currently  under  development by the Company will require  significant
additional  research and  development  and  extensive  preclinical  and clinical
testing prior to application  for  commercial  use. A number of companies in the
biotechnology and pharmaceutical  industries have suffered  significant setbacks
in clinical trials,  even after showing  promising results in earlier studies or
trials.  Although  the  Company  has  obtained  favorable  results  to  date  in
preclinical studies and clinical trials of certain of its products, such results
may not be  indicative  of  results  that  will  ultimately  be  obtained  in or
throughout  such clinical  trials,  and there can be no assurance  that clinical
testing  will  show any of the  Company's  products  to be safe or  efficacious.
Additionally,  there can be no  assurance  that the Company  will not  encounter
problems in its clinical trials that will cause the Company to delay, suspend or
terminate  those  clinical  trials.  There  can  also be no  assurance  that the
Company's research or product  development efforts or those of its collaborative
partners will be  successfully  completed,  that any compounds  currently  under
development by the Company will be  successfully  developed into drugs,  or that
any products will receive  regulatory  approval on a timely basis, if at all. If
any such problems occur, the Company could be materially and adversely affected.

     Need for Additional  Funds;  Uncertainty of Future  Funding.  The Company's
operations to date have consumed substantial amounts of cash. Negative cash flow
from the  Company's  operations  is expected to continue and even to  accelerate
over at least the next several years. The Company's  capital  requirements  will
depend on numerous factors,  including:  the progress of preclinical testing and
clinical  trials;  the  progress  of  the  Company's  research  and  development
programs;  the time and costs  required  to  obtain  regulatory  approvals;  the
resources  devoted to  manufacturing  methods  and  advanced  technologies;  the
ability to obtain licensing arrangements;  the cost of filing,  prosecuting and,
if necessary,  enforcing patent claims; the cost of commercialization activities
and  arrangements;  and  the  demand  for the  Company's  products  if and  when
approved.  The  Company  will  have to  raise  substantial  additional  funds to
complete  development  of any product or bring  products to market.  Issuance of
additional equity securities by the Company, for these or other purposes,  could
result in dilution to then existing stockholders. There can be no assurance that
additional  financing  will be  available  on  acceptable  terms,  if at all. If
adequate  funds are not  available  on  acceptable  terms,  the  Company  may be
required  to  delay,  scale  back  or  eliminate  one or  more  of  its  product
development  programs or obtain funds through  arrangements  with  collaborative
partners or others that may require the Company to relinquish  rights to certain
of its technologies or products that the Company would not otherwise relinquish,
which may have a material adverse effect on the Company.

     Dependence  on  Others  for  Clinical  Development  and  Manufacturing  and
Marketing.  The  Company  has  limited  experience  in  drug  development,   the
regulatory approval process,  manufacturing and marketing. Other than Dr. Ronald
W. Pero,  Ph.D., the Company's Chief Scientific  Officer,  and Bjorn Nordenvall,
M.D. and Ph.D., the Company's Chief Executive  Officer,  Chairman and President,
the  Company  does not  directly  employ  any  scientists  or  other  laboratory
personnel and all of its preclinical tests and clinical trials are subcontracted
to and  performed  at the  University  of Lund,  Sweden and at other  centers in
Europe and the United  States,  with the  assistance of research and  consulting
firms.  Accordingly,  OXiGENE  has  depended,  and in the  future  is  likely to
continue to depend, on others for assistance in many areas,  including research,
conducting  preclinical  testing and clinical  trials,  the regulatory  approval
process,  manufacturing  and  marketing.  Although  the  Company  considers  its
relations  with  existing  collaborative  partners to be  satisfactory,  all its
current arrangements are short term in nature. Funding requirements, competitive
factors or  prioritization  of other  opportunities may lead the Company to seek
additional  arrangements with third parties.  While OXiGENE is likely to explore
license and development opportunities for its technologies with other companies,
there can be no assurance  that the Company will be successful  in  establishing
and maintaining  collaborative  agreements or licensing  arrangements;  that any
collaborative   partner  will  not  be  pursuing  alternative   technologies  or
developing  alternative  compounds  either on its own or in  collaboration  with
others,  directed at the same  diseases as those  involved in its  collaborative
arrangements with the Company; that any such collaborative  partners will devote
resources to the Company's technologies or compounds on a basis favorable to the
Company;  that any such arrangements  will be on terms favorable to OXiGENE;  or
that,   if   established,   such  future   licensees   will  be   successful  in
commercializing products.  Finally, if the Company's collaboration  arrangements
are  terminated  prior to  their  expiration  or if the  other  parties  to such
arrangements  fail  to  adequately  perform,  there  can  be no  assurance  that
submission of product  candidates for  regulatory  approval will not be delayed.
See  information  in the Annual  Report under the caption  "Business",  which is
incorporated by reference herein.

     Clinical  Trials;  Government  Regulation  and Health Care Reform;  Managed
Care. The Company's research and development activities, preclinical testing and
clinical trials, and the manufacturing and marketing of its products are subject
to  extensive  regulation  by numerous  governmental  authorities  in the United
States and other  countries.  See information in the Company's  Annual Report in
Form 10-K for the year ended  December 31, 1997,  under the caption  "Business",
which is  incorporated  by reference  herein.  Preclinical  testing and clinical
trials and  manufacturing  and  marketing  of  OXiGENE's  products  are and will
continue to be subject to the  rigorous  testing and  approval  processes of the
FDA,  the  Swedish  Medical  Products  Agency  and other  corresponding  foreign
regulatory  authorities.  Clinical testing and the regulatory  process generally
take many  years and  require  the  expenditure  of  substantial  resources.  In
addition,  delays or rejections may be encountered  during the period of product
development,  clinical  testing  and FDA  regulatory  review  of each  submitted
application.  Similar delays may also be encountered in foreign countries. There
can be no  assurance  that,  even after such time and  expenditures,  regulatory
approval  will be  obtained  for any  products  developed  by  OXiGENE or that a
product,  if approved in one country,  will be approved in other countries.  See
information  in the  Annual  Report  under  the  caption  "Business",  which  is
incorporated by reference herein.  Moreover, if regulatory approval of a product
is granted, such approval may entail limitations on the indicated uses for which
that  product may be  marketed.  Further,  even if such  regulatory  approval is
obtained, a marketed product, its manufacturer and its manufacturing  facilities
are subject to continual review and periodic inspections, and later discovery of
previously unknown problems (such as previously  undiscovered side effects) with
a product,  manufacturer or facility may result in restrictions on such product,
manufacturer  or facility,  including a possible  withdrawal of the product from
the market.  Failure to comply with the applicable regulatory  requirements can,
among  other  things,  result in fines,  suspensions  of  regulatory  approvals,
product recalls,  operating restrictions,  injunctions and criminal prosecution.
Additionally,  further  government  regulation  may be  established  which could
prevent or delay regulatory  approval of the Company's  products.  Further,  the
U.S. Congress continues to debate various health care reform proposals which, if
adopted, may have a material adverse effect on the Company. Moreover,  continued
cost control  initiatives by health care maintenance  organizations  and similar
programs may affect the financial  ability and willingness of patients and their
health care providers to utilize certain therapies.

     Competition and Risk of Technological Obsolescence.  The Company is engaged
in a rapidly evolving field.  Competition from other  pharmaceutical  companies,
biotechnology  companies and research and academic  institutions  is intense and
expected  to  increase.   Many  of  those   companies  and   institutions   have
substantially greater financial, technical and human resources than the Company.
Those companies and institutions also have  substantially  greater experience in
developing  products,  in conducting  clinical trials,  in obtaining  regulatory
approval  and  in   manufacturing   and   marketing   pharmaceutical   products.
Accordingly,  competitors may succeed in obtaining regulatory approval for their
products  more  rapidly  than  the  Company.  The  Company  also  competes  with
universities  and other research  institutions  in the  development of products,
technologies and processes.  Competitors have developed or are in the process of
developing  technologies  that  are,  or in the  future  may be,  the  basis for
competitive  products.  Some of those  products  may have an entirely  different
approach or means of accomplishing the desired  therapeutic effect than products
being  developed by the Company.  See information in the Annual Report under the
caption  "Competition." There can be no assurance that the Company's competitors
will not succeed in developing technologies and products that are more effective
and/or cost  competitive than those being developed by the Company or that would
render the Company's  technology and products less competitive or even obsolete.
In  addition,  one or more of the  Company's  competitors  may  achieve  product
commercialization  or patent  protection  earlier than the Company,  which could
materially adversely affect the Company.

     Dependence  on  Patents  and  Proprietary  Technology.  To date,  OXiGENE's
principal  products,  Sensamide(TM)  and  Neu-Sensamide(TM),  have been based on
certain available compounds that are produced by others. The Company anticipates
that products it develops hereafter may include or be based on the same or other
compounds  owned or  produced  by  unaffiliated  parties,  as well as  synthetic
compounds  it  may  discover.  Although  the  Company  expects  to  seek  patent
protection  for any  compounds  it  discovers  and/or for any  specific  uses is
discovers for new or previously known compounds,  there is no assurance that any
or all of them will be subject to  effective  patent  protection.  Further,  the
development  of  regimens  for  the  administration  of  pharmaceuticals,  which
generally  involve  specifications  for the  frequency,  timing  and  amount  of
dosages, has been, and the Company believes may continue to be, important to the
Company's efforts, although those processes, as such, may not be patentable.

     The  Company's  success  will  depend,  in part,  on its  ability to obtain
patents,  protect  its trade  secrets  and  operate  without  infringing  on the
proprietary  rights of others.  As of March 8, 1998, the Company is the assignee
of four granted U.S.  patents,  five pending U.S.  patent  applications,  and of
granted  patents  and/or  pending   applications  in  other  countries   (and/or
international  applications  designating other countries) corresponding to three
of the granted U.S.  patents and all five of the pending U.S.  applications.  In
addition,  the  Company  will  be  the  assignee  of a U.S.  provisional  patent
application filed in 1997, and of international and foreign counterparts thereof
expected  to be  filed  in 1998.  The  patent  position  of  pharmaceutical  and
biotechnology  firms like  OXiGENE  generally is highly  uncertain  and involves
complex legal and factual questions, resulting in both an apparent inconsistency
regarding the breadth of claims allowed in U.S. patents and general  uncertainty
as to their legal interpretation and enforceability.  Accordingly,  there can be
no assurance that the Company's patent applications will result in patents being
issued,  that any issued  patents  will  provide  the Company  with  competitive
protection or will not be  challenged  by others,  or that the patents of others
will not have an adverse  effect on the ability of the  Company to do  business.
Moreover,  since  some  of the  basic  research  relating  to one or more of the
Company's   patent   applications   and/or  patents  was  performed  at  various
universities  and/or funded by grants,  particularly in Sweden,  there can be no
assurance that one or more universities,  employees of such universities  and/or
grantors will not assert that they have certain  rights in such research and any
resulting products,  although the Company is not aware of any such assertions or
any basis therefor.  Furthermore, there can be no assurance that others will not
independently develop similar products,  will not duplicate any of the Company's
products or, if patents are issued to the Company,  will not design  around such
patents. In addition,  the Company may be required to obtain licenses to patents
or other  proprietary  rights of  others.  No  assurance  can be given  that any
licenses  required  under any such patents or  proprietary  rights would be made
available on terms acceptable to the Company, if at all. If the Company does not
obtain such licenses,  it could encounter delays in product market introductions
while it  attempts  to  design  around  such  patents,  or could  find  that the
development,  manufacture  or  sale  of  products  requiring  such  licenses  is
foreclosed.  In addition, the Company could incur substantial costs in defending
itself in suits  brought  against it or in  connection  with patents to which it
holds a license or in bringing suit to protect the Company's own patents against
infringement.  The Company generally  requires  employees,  Scientific  Advisory
Board members and the  institutions  that perform its  preclinical  and clinical
tests   (though  not  the  employees  of  such   institutions)   to  enter  into
confidentiality  agreements with the Company.  Those agreements provide that all
confidential  information  developed or made known to the individual  during the
course of the relationship  with the Company is to be kept  confidential and not
to be disclosed to third parties, except in specific circumstances.  In the case
of employees,  the agreements also provide that all inventions conceived by such
employees  shall be the  exclusive  property  of the  Company.  There  can be no
assurance,  however,  that any such agreement will provide meaningful protection
for the Company's trade secrets or other  confidential  information in the event
of unauthorized  use or disclosure of such  information.  See information in the
Annual report under the caption "Patents and Trade Secrets."

     Dependence  on Certain  Officers  and  Directors  and  Others.  The Company
believes  that its  success  is,  and will  likely  continue  to be,  materially
dependent  upon its  ability to retain the  services  of certain of its  current
officers and directors,  particularly Dr. Bjorn Nordenvall,  its Chief Executive
Officer,  Chairman and  President,  and Dr.  Ronald Pero,  its Chief  Scientific
Officer.  The loss of the  services  of any of these  individuals  could  have a
material adverse effect on the Company. In addition, the Company has established
relationships   with   universities,   hospitals   and  research   institutions,
particularly  the  University of Lund,  Lund,  Sweden,  which have  historically
provided,  and  continue  to  provide,  the  Company  with  access  to  research
laboratories,  clinical trials, facilities and patients. Dr. Pero is a Professor
of  Molecular  Ecogenetics  at the  University  of Lund.  The  Company  benefits
indirectly  from certain  research  grants  received by Dr. Pero. The Company is
materially dependent on the research and development efforts of Dr. Pero and his
various relationships and affiliations,  the loss of which could have a material
adverse effect on the Company's  business.  Additionally,  the Company  believes
that it may, at any time and from time to time, be  materially  dependent on the
services of consultants and other unaffiliated third parties.

     Product  Liability  Exposure;  Limited Insurance  Coverage.  The use of the
Company's products in clinical trials and for commercial  applications,  if any,
may expose the Company to liability  claims,  in the event such  products  cause
injury,  disease  or result  in  adverse  effects.  These  claims  could be made
directly by health care institutions,  contract laboratories, patients or others
using such  products.  Although  the Company has  obtained  liability  insurance
coverage for its ongoing  clinical  trials,  and there can be no assurance  that
such  coverage  will be in amounts  sufficient  to protect the  Company  against
claims or recalls  that could have a material  adverse  effect on the  financial
condition and  prospects of the Company.  Further,  adverse  product and similar
liability  claims could  negatively  impact the  Company's  ability to obtain or
maintain regulatory approvals for its technology and products.

     Price  Volatility of the Common Stock. The market price of the Common Stock
has been,  and likely will continue to be, highly  volatile as frequently is the
case  with  the  publicly-traded   securities  of  pharmaceutical  research  and
development companies. Factors such as results of clinical trials, announcements
of  research  developments  and results by the  Company or its  competitors  and
government regulatory action affecting the Company's products in both the United
States and foreign  countries  have had, and may continue to have, a significant
effect on the Company's business and on the market price of the Common Stock. As
of December 31, 1997, an aggregate of 49,612 Stock appreciation rights ("SARs"),
with a weighted  average  exercise  price of $7.19 per SAR,  had been granted to
certain clinical  investigators and consultants.  The Company is not required to
make any cash  payments  upon  exercise  of any such SAR. If and when the spread
between the market price of the Company's Common Stock and the exercise price of
the SARs changes,  the charge for financial  reporting  purposes to research and
development will be adjusted to reflect an increase or decrease, as the case may
be,  in  the  market  price  of  the  Company's   Common  Stock.   In  addition,
substantially  all of the  shares of Common  Stock  issuable  upon  exercise  of
outstanding options, SARs and warrants have been registered and may be sold from
time to time  hereafter.  Such sales, as well as future sales of Common Stock by
existing stockholders, or the perception that sales could occur, could adversely
affect the market  price of the Common  Stock.  The price and  liquidity  of the
Common Stock may also be  significantly  affected by trading activity and market
factors  related to the NASDAQ  and  Stockholm  Stock  Exchange  markets,  which
factors and the effects thereof may differ between those markets.

     No Dividends.  The Company has not declared or paid dividends on its Common
Stock since its inception and does not intend to declare or pay any dividends to
its stockholders in the foreseeable future.

     Year 2000  Compliance.  Many currently  installed  computer systems are not
capable of  distinguishing  21st  century  dates from 20th century  dates.  As a
result,  in less than two years,  the computer systems and software used by many
companies  may need to be updated to comply with such "Year 2000"  requirements.
The Company believes its accounting and management  information systems are Year
2000  compliant.  The ability of third  parties with whom the Company  transacts
business  to  address  adequately  their  Year 2000  compliance  is  beyond  the
Company's control.  The failure of such third parties to address adequately Year
2000 compliance could have a material adverse effect on the Company's  business,
results of operations and financial conditions.

                                   THE COMPANY

     OXiGENE,   Inc.   ("OXiGENE"  or  the   "Company")   is  an   international
biopharmaceutical  company  developing  a  portfolio  of products  that  focuses
primarily on combating  cancer.  The Company's  initial  product  development is
based on  proprietary  DNA repair  technology.  The Company  currently has three
product    candidates   in   clinical    development.    Neu-Sensamide(TM),    a
radiosensitizer,  is in a Phase III clinical  trial in patients  with  non-small
cell lung cancer and two Phase I studies in patients with glioblastoma.  Oxi-104
is being  developed  as a  chemosensitizer  in Phase I studies in patients  with
advanced stage cancers.  Cordycepin is a compound in Phase I studies in patients
with TdT positive  leukemia.  The Company is also developing  Combretastatin A-4
phosphate,  a  tumor  vascular  targeting  agent  that in  pre-clinical  studies
destroyed   the  blood  vessels  that  enable  a  tumor  to  survive  and  grow.
Combretastatin is expected to enter clinical trials in the second half of 1998.

     OXiGENE's  principal  products,  Neu-Sensamide(TM)  and  Oxi-104  (proposed
generic  name  declopramide),  are  sensitizers,  drugs  that make a tumor  more
susceptible to damage by radiation or  chemotherapy.  Both products are based on
the Company's  proprietary  knowledge of the processes by which certain  enzymes
repair damaged DNA sites, a function essential to a cell's survival.  The cell's
enzymes that normally  repair DNA damage to the tumor cell counter the cytotoxic
(cell-killing)  effects of radiation  and  chemotherapy  by repairing  the tumor
cell's DNA that has been damaged by either of those therapies. When administered
in accordance with its prescribed regimen, the Company believes, on the basis of
its clinical studies, that  Neu-Sensamide(TM)  should make cancerous tumor cells
more  sensitive to radiation by  inhibiting  DNA repair  activity,  consequently
increasing tumor damage from radiation therapy in those cells. Accordingly,  the
Company  expects that patient  response to radiation  therapy should be improved
and may result in increased  tumor  shrinkage,  reduced side  effects,  or both.
Based on the  results of  preclinical  animal  studies,  OXiGENE  believes  that
Oxi-104 alone may induce tumor growth-inhibiting and tumor-killing effects.

     Neu-Sensamide(TM)  is  a  proprietary  reformulation  of  Sensamide,(TM)  a
prototype drug in which  metoclopramide is the active  ingredient.  In September
1997,  the Company  announced  the first  preliminary  results of its  European,
randomized,   controlled   Phase  II/III  clinical  trial  of  Sensamide(TM)  in
combination  with radiation  therapy in 218 patients with  inoperable  non-small
cell lung cancer  ("NSCLC"),  which indicated an increased  median survival time
for those patients who received a full dosage of  Sensamide(TM)  plus radiation.
In March 1998, the Company  supplemented  those  preliminary  results with tumor
response  data.  The  additional  study data  indicate  that more  patients with
squamous  cell  carcinoma  (the most common form of lung cancer) and a Karnofsky
score (a  benchmark  for  assessing  the  degree of illness  or  terminally  ill
patients)  of  90  or  higher,  when  receiving  Sensamide(TM)  plus  radiation,
experienced  tumor  response.   Forty-seven  percent  (47%)  of  those  patients
experienced complete or partial (complete is 100% and partial is 50% or greater)
tumor  response,  compared to 30% for patients who  received  radiation  only. A
significant  number of patients  did not complete  the  Sensamide(TM)  treatment
because of either the Central Nervous System (CNS) side effects  associated with
metoclopramide  (approximately  25%) or the progressive  deterioration  of their
health   (approximately  20%).  These  CNS  side  effects  (sedation,   anxiety,
restlessness and depression), however, are reversible, have been well documented
in the clinical  literature  for more than 30 years,  and were not unexpected by
the Company.  The Company believes those results constitute  sufficient proof of
the theory underlying its principal scientific concept to provide a basis for it
to continue  advanced  clinical  studies  with  respect to its later  generation
drugs,  which,  the Company  believes,  have  reduced  side  effects  from those
experienced with Sensamide (TM) (as described above).

     In the fourth quarter of 1996, OXiGENE commenced an additional  randomized,
controlled   Phase  III  clinical   trial  in  226  patients  with  NSCLC  using
Neu-Sensamide(TM),  the Company's  second-generation  sensitizer  drug. Based on
preliminary  preclinical  studies  and a Phase I  clinical  trial,  the  Company
believes  that  Neu-Sensamide(TM)  will show a reduced CNS side  effect  profile
compared to  Sensamide,(TM)  resulting  in an increase of the number of patients
completing   treatment.   The  Company   intends  to  use  the  results  of  the
Sensamide(TM)   study  to   support   a  New  Drug   Application   ("NDA")   for
Neu-Sensamide(TM)  as a radiation  sensitizer for the treatment of patients with
NSCLC.

     In the fourth quarter of 1997, a 15-patient,  open-label,  Phase I study of
Neu-Sensamide(TM)  in patients with  glioblastoma,  a highly  malignant  form of
brain  cancer,   commenced  in  the  United  States.  The  European  Phase  I/II
counterpart of this study was initiated in Sweden in the second quarter of 1996.

     After the filing of an  Investigational  New Drug ("IND")  application with
the U.S.  Food and Drug  Administration  ("FDA")  in  March  1997,  the  Company
commenced Phase I/II clinical tests of Oxi-104,  the Company's third  generation
sensitizer, in combination with 5-FU and Cisplatin  (chemotherapeutic agents) in
patients with advanced stages of cancer.  Oxi-104 is an N-substituted  benzamide
but,  unlike   Sensamide(TM)   and   Neu-Sensamide,(TM)   it  is  not  based  on
metoclopramide  (an N-substituted  benzamide).  Oxi-104 has been designed with a
molecular  structure that, the Company  believes,  may reduce side effects while
maintaining the sensitizing properties of other N-substituted benzamides.

     The first of the Company's products being developed,  under a collaborative
arrangement,  as a direct treatment of cancer is Cordycepin.  A Phase I clinical
study of Cordycepin in combination  with Pentostatin in patients with refractory
TdT-positive  acute lymphoid  leukemia  started in the first quarter of 1997, in
collaboration  with Boston  Medical Center  Corporation,  an affiliate of Boston
University  Medical  Center  ("BMC"),  and the National  Cancer  Institute.  The
collaboration  with BMC was expanded  with the  appointment  of Dr. Ronald Pero,
OXiGENE's  Chief  Scientific  Officer,  as  a  professor  and  member  of  BMC's
scientific staff and the creation of an OXiGENE-sponsored research facility that
will conduct  research  into,  among other  things,  the  potential  therapeutic
synergies between N-substituted benzamides and Cordycepin and related compounds.
OXiGENE  has an option to  acquire  an  exclusive,  world-wide,  royalty-bearing
license  with  respect  to  any  invention  or  product,  including  Cordycepin,
conceived in the course of work performed under the BMC agreement.

     In  May  1997,  OXiGENE  entered  into  an  agreement  with  Arizona  State
University  ("ASU")  to  develop  and  test  certain  Combretastatin  compounds,
including  Combretastatin  A-4  Prodrug  (hereinafter  generally  referred to as
"Combretastatin"). Combretastatins are naturally-occurring substances, that were
identified and isolated by Dr. George R. Pettit, Regents Professor of Chemistry,
and  his   colleagues  at  ASU,  from  the  South   African   bushwillow   tree.
Combretastatin  is  believed to block the growth of new blood  vessels  into the
tumor and to destroy recently-formed blood vessels within the tumor. OXiGENE has
an option to acquire an  exclusive,  world-wide,  royalty-bearing  license  with
respect to the commercial rights to Combretastatin.

     The Company has also  developed  proprietary  assays  (tests)  that measure
levels of the DNA repair  enzyme PARP (Poly (ADP Ribose)  Polymerase)  in blood,
thereby  suggesting DNA repair activity that the Company believes  correlates to
immune function and status, and has identified a mixture of compounds, Nicoplex,
that it believes may be capable of stimulating DNA repair.  Based on preclinical
studies to date, OXiGENE has commenced the clinical development of these product
areas.

     There can be no assurance that the Company's  existing and planned  product
development efforts and clinical trials for Sensamide,(TM)  Neu-Sensamide(TM) or
any other  compounds,  will be successful or completed  within  anticipated time
frames,  or at all;  that  regulatory  approvals  will be obtained or will be as
broad as sought;  or that any  products,  if  introduced,  will  achieve  market
acceptance. In addition, there can be no assurance that the Company's technology
will prove  effective,  that the  Company  will be able to enter into  strategic
alliances or joint  ventures or that the terms  thereof will be favorable to the
Company, or that the Company will be profitable.

     The Company was  incorporated  in New York in 1988,  and  subsequently  was
re-incorporated  in  Delaware  in  1992.  The  Company   established  a  Swedish
subsidiary,  OXiGENE  Europe  AB, in  December  1994.  The  Company's  principal
executive  office is located at One Copley Place,  Suite 602,  Boston,  MA 02116
(phone   no.:   617-536-9500;   fax  no.:   617-536-4700,   and  in   Sweden  at
Blasieholmsgatan  2C, S-111 48 Stockholm,  Sweden (phone no.: 011 46 8 678 8720;
fax no.:  011 46 8 678  8605)  and at  Scheelevagen  17,  S-223 70 Lund,  Sweden
(telephone  no.: 011 46 46 16 8860; fax no.: 011 46 46 16 8866).  Any references
in this  Prospectus to "OXiGENE" or the "Company"  shall mean OXiGENE,  Inc. and
its wholly-owned Swedish subsidiary, OXiGENE Europe AB.

                              PLAN OF DISTRIBUTION

     Shares  of Common  Stock  will be  issued  upon  exercise  of  Warrants  as
evidenced by the  surrender of the Warrant  certificate  or  certificates  on or
prior to the  expiration  date of such Warrants at the offices of American Stock
Transfer & Trust Company, as warrant agent (the "Warrant Agent"),  with the form
of  "Election  to  Purchase"  on the  reverse  side of the  Warrant  certificate
completed and executed as indicated, accompanied by payment of the full exercise
price (by certified  check  payable to the order of the Warrant  Agent) for each
Warrant being exercised. No soliciting agent has been engaged by the Company for
the purpose of soliciting the exercise of the Warrants.

                                INFORMATION AGENT

     The  Company  has  engaged  the  services  of  Innisfree  M&A  Incorporated
("Innisfree")  to  serve as  information  agent  for the  purpose  of  answering
inquiries from Warrantholders.  Additional copies of this Prospectus may also be
obtained from Innisfree. Innisfree's address and telephone number are:

                           Innisfree M&A Incorporated
                           501 Madison Avenue, 20th Floor
                           New York, NY  10022
                           (888) 750-5834 in the U.S. or
                           (212) 750-5834 from outside the U.S.



                                 USE OF PROCEEDS

     The  Company  will  use  the  net  proceeds  of any  exercise  of  Warrants
(approximately  $______________* if all Warrants are exercised,  after deducting
the expenses of this offering estimated to be $_____________,*  all of which are
payable by the  Company) to finance its  ongoing  clinical  trials for drugs and
assays,  regulatory  applications,  research and development and working capital
and general corporate purposes.  Exact allocation of the net proceeds for any of
such  purposes  and the  timing of such  expenditures  will  depend  on  various
factors, including primarily the exact number of Warrants exercised at any given
time,  the Company's  timing of its regulatory  applications  and the timing and
results of research and development activities. The net proceeds of the exercise
of the Warrants may also be used to finance  OXiGENE's  participation in certain
research  and  development  projects  with third  parties  or to acquire  new or
additional   technologies  or  companies  that  complement  OXiGENE's  business,
although no such transactions are presently being discussed or negotiated.

- --------
[FN]
*    If all  847,135  Warrants  are  exercised,  the amount of  proceeds  to the
     Company  will equal  $12,156,387.25,  minus the  expenses of this  offering
     which will be filed by amendment.


     The Company anticipates that it may need additional  financing to carry out
its activities  until such time as (i) it can  commercialize  its  technologies,
either through  licensing  arrangements or through the sale of products based on
its  technology,  and (ii)  revenues  from  such  commercial  activities  become
sufficient  to cover the  Company's  expenditures.  The amount and timing of the
Company's  financing  requirements is highly uncertain,  and no guarantee can be
given that  additional  financing  will be available on terms  acceptable to the
Company, if at all.

     Pending  application of the net proceeds of this offering in the manner set
forth  above,   the  Company  will  invest  the  net  proceeds  in   short-term,
interest-bearing  obligations  issued by the U.S.  Government,  its  agencies or
instrumentalities.

                            DESCRIPTION OF SECURITIES

     Common  Stock.  The Company is  authorized  to issue  15,000,000  shares of
Common Stock,  par value $.01 per share,  of which  10,204,049  shares of Common
Stock are  outstanding  as of July 6,  1998.  The  holders  of Common  Stock are
entitled to one vote for each share held of record on all matters to be voted on
by stockholders.  There is no cumulative  voting with respect to the election of
directors.  As a consequence,  the holders of more than 50% of the shares voting
for the election of directors can elect all the directors.  The By-Laws  provide
that only a majority of the issued and  outstanding  shares of Common Stock need
to be  represented  for a quorum,  and to transact  business at a  stockholders'
meeting.  The holders of Common Stock are entitled to receive dividends when, as
and if declared by the Board of  Directors  out of the funds  legally  available
therefor.  The Company has no present plans to pay dividends with respect to the
shares of Common Stock. In the event of liquidation,  dissolution or the winding
up of the Company,  the holders of Common Stock are entitled to share ratably in
all assets remaining available for distribution after payment of liabilities and
after provision has been made for each class of stock, if any, having preference
over the Common  Stock.  Holders  of shares of Common  Stock,  as such,  have no
conversion, preemptive or other subscription rights, and there are no redemption
provisions  applicable to the Common Stock. All the outstanding shares of Common
Stock are, and the shares of Common Stock  underlying the Warrants,  when issued
in accordance  with the terms of the Warrants,  will be, validly  authorized and
issued, fully paid and nonassessable.

     Warrants.  In August 1993, the Company completed an initial public offering
of 1,605,000  Units (the "Units"),  each Unit  consisting of one share of Common
Stock,  par value  $.01 per share  (the  "Common  Stock"),  and one  Warrant  to
purchase  one share of Common Stock (the  "Warrants").  The Common Stock and the
Warrants included in the Units became separately transferable on August 26, 1993
(the  "Separation  Date").  The Warrant  Agreement,  dated  August 26, 1993 (the
"Warrant  Agreement"),  between the Company and the Warrant  Agent,  pursuant to
which the Warrants were issued  provides  that each Warrant  entitles the holder
thereof to purchase one share of Common Stock for $7.00 during the first year of
exercisability  ending on the first anniversary of the Separation Date, with the
exercise price thereafter  increasing by $2.00 on each annual anniversary of the
Separation Date.

     On August 29, 1994,  the Company and the Warrant  Agent amended the Warrant
Agreement  to  provide  that,  for a  period  of 65 days  from  the  date of the
Prospectus  related thereto (the "Reduced Exercise Price Period"),  each Warrant
would  entitle the  registered  holder  thereof to purchase  one share of Common
Stock,  at a price of $7.00 per  share.  From and  after the end of the  Reduced
Exercise  Price  Period and until August 26,  1995,  the  exercise  price of the
Warrants was $9.00 per share,  with the exercise  price  increasing  by $2.00 on
each annual anniversary of the Separation Date thereafter. Unless exercised, the
Warrants were automatically set to expire under the current Warrant Agreement at
5:00 p.m. New York City time on August 26, 1998.

     The holders of the Warrants have certain anti-dilution  protection upon the
occurrence of certain events,  including stock dividends,  stock splits, mergers
and  reclassifications.  The  holders of the  Warrants  have no right to vote on
matters  submitted to the stockholders of the Company,  have no right to receive
dividends,  and have none of the other rights conferred upon stockholders of the
Company.  The holders of the Warrants are not entitled to share in the assets of
the Company in the event of  liquidation,  dissolution  or the winding up of the
Company's affairs.

     On July 8, 1998,  the  Company and the  Warrant  Agent  amended the Warrant
Agreement  to provide  that (a) at 5:00  p.m.,  New York City time on August 26,
1998,  with no action  required to be taken by the holders of the Warrants,  the
Original  Expiration  Date will be extended (the  "Extension") to 5:00 p.m., New
York City time,  December 31, 1999 (the  "Amended  Expiration  Date"),  (b) each
Warrant shall be exercisable on and after August 26, 1998, and until the Amended
Expiration Date, for 1.07 shares of Common Stock at a price of $14.35 (i.e., the
exercise price currently in effect),  subject only to adjustment after that date
in  accordance  with the  anti-dilution  provisions  set  forth  in the  Warrant
Agreement  (which are not being  amended) (the "Price  Amendment"),  and (c) the
Company has the right,  but not the  obligation,  at any time after the Original
Expiration Date, to redeem,  at any time or from time to time, any or all of the
Warrants (the "Call" and,  together with the Extension and the Price  Amendment,
the "Amendments");  provided, however, the Company may exercise the Call only if
(i) the average  trading price of the shares of the Company's  Common Stock,  as
reported  by  NASDAQ,  for any  period  of ten  consecutive  trading  days  (not
including  any days on which there are no purchases or sales of Common Stock but
the NASDAQ is open for  trading)  has traded at not less than  $16.00 per share,
and (ii) the  Company  has  given not less  than 20 days  written  notice to the
Warrantholders indicating the Company's election to exercise the Call. Following
a Call, any Warrants that were called that remain  unexercised at the end of the
20-day notice period will be redeemed promptly  thereafter at a redemption price
of $.001 per Warrant, payable by the Company in cash.

     The Warrantholders need take no action in connection with the Amendments to
the Warrant Agreement,  which apply to all outstanding Warrants.  Warrantholders
need not turn in the certificates  evidencing their Warrants that do not reflect
the Amendments  (the "Original  Warrant  Certificates")  even after the Original
Expiration Date. However,  after the Original Expiration Date, any Warrantholder
has the right,  but not the  obligation,  at the  Warrantholder's  election,  to
surrender  Original  Warrant  Certificates  to  the  Warrant  Agent  which  will
thereupon be replaced  with  certificates  evidencing  Warrants  containing  the
Amendments (the "Revised Warrant Certificates"). In addition, after the Original
Expiration Date, Revised Warrant  Certificates will be issued in connection with
(a) any transfer of Warrants evidenced by Original Warrant Certificates or (b) a
partial exercise of Warrants evidenced by Original Warrant Certificates.


                 CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS

     The  following  is a summary  of the  principal  U.S.  federal  income  tax
considerations  relevant to a  Warrantholder  in connection with the adoption of
the Amendments and the ownership, disposition and exercise or lapse of a Warrant
following  adoption  of  the  Amendments.  This  summary  deals  only  with  the
beneficial owner of a Warrant that is for U.S. federal income tax purposes (i) a
citizen or resident of the United  States,  (ii) a  corporation,  partnership or
other  business  entity  created or organized in or under the laws of the United
States or any State or political  subdivision thereof (including the District of
Columbia),  (iii) an estate  the  income of which is  subject  to United  States
federal income taxation  regardless of its source,  or (iv) a trust with respect
to  which a  court  within  the  United  States  is  able  to  exercise  primary
supervision over its administration,  and one or more United States persons have
the  authority  to  control  all of its  substantial  decisions  (each,  a "U.S.
Holder").

     This discussion is based on interpretations of the Internal Revenue Code of
1986, as amended (the "Code"),  regulations issued  thereunder,  and rulings and
decisions  currently  in effect  (or in some cases  proposed),  all of which are
subject  to  change.  Any  such  change  may be  applied  retroactively  and may
adversely affect the U.S. federal income tax consequences described herein.

     This summary does not purport to be a  comprehensive  description of all of
the tax  considerations  that may be relevant in respect of the  adoption of the
Amendments or a decision to hold,  buy,  sell,  exercise or let lapse a Warrant.
This summary  addresses only U.S. Holders that own Warrants and any Common Stock
received upon exercise thereof as capital assets and does not discuss all of the
tax  consequences  that may be relevant to particular  investors or to investors
subject to special  treatment  under the U.S.  federal  income tax laws (such as
insurance  companies,   financial  institutions,   retirement  plans,  regulated
investment companies, securities dealers, or investors whose functional currency
is not the U.S.  dollar),  and  persons  that will  hold a Warrant  as part of a
"straddle"  or  "conversion  transaction"  for  federal  income tax  purposes or
otherwise  as part of an  integrated  transaction.  No ruling from the  Internal
Revenue  Service ("IRS") will be sought with respect to the Warrants and the IRS
could take a contrary view with respect to the matters described below.

ALL HOLDERS OF THE  WARRANTS  SHOULD  CONSULT  THEIR TAX ADVISORS AS TO THE U.S.
FEDERAL,  STATE, LOCAL AND OTHER TAX CONSEQUENCES TO THEM OF THE ADOPTION OF THE
AMENDMENTS,  THE OWNERSHIP,  DISPOSITION  AND EXERCISE OR LAPSE OF THE WARRANTS,
AND OF THE OWNERSHIP OF ANY COMMON STOCK RECEIVED UPON EXERCISE OF THE WARRANTS.

Adoption of the Amendments

     A U.S. Holder generally should not recognize gain or loss upon the adoption
of the Amendments, should have a tax basis in the Warrants after the adoption of
the Amendments (the "Amended Warrants") equal to that U.S. Holder's tax basis in
the  Warrants  prior  to the  adoption  of the  Amendments  (the  "Pre-Amendment
Warrants"),  and  should  have a holding  period in the  Amended  Warrants  that
includes that U.S. Holder's holding period in the Pre-Amended Warrants. However,
if the Company pays a dividend or makes a distribution  to its  shareholders  or
holders  of  warrants  (other  than  the  Warrants),  or  pays  interest  on any
convertible  debt  that  may be  outstanding,  each  within  a 36  month  period
beginning on the effective  date of the adoption of the Amendments or subsequent
to such 36 month period if pursuant to a plan,  the  adoption of the  Amendments
could be treated as a taxable distribution.  The Company does not anticipate the
payment of  dividends  or any other such  distributions  or payments  within the
36-month  period  beginning  on  the  effective  date  of  the  adoption  of the
Amendments and does not plan otherwise to make such a distribution or payment.

     Under section 305(c) of the Code, certain adjustments to the exercise price
of the Amended Warrants or the number of shares of Common Stock purchasable upon
exercise of the Amended Warrants that occur pursuant to the terms of the Amended
Warrants could result in a deemed distribution to U.S. Holders or to the holders
of Common  Stock,  which  could be  taxable  to such U.S.  Holders or holders of
Common Stock.

Sale, Exchange, or Redemption of Amended Warrant

     A sale, exchange, or redemption of an Amended Warrant will generally result
in taxable gain or loss equal to the difference  between the amount realized and
the U.S.  Holder's tax basis in the Amended  Warrant.  Such gain or loss will be
long-term  capital  gain or loss if the  U.S.  Holder's  holding  period  in the
Amended  Warrant  exceeds  one  year.  In the  case of a U.S.  Holder  that is a
noncorporate taxpayer, any such long-term capital gain will generally be subject
to U.S.  federal  income tax at a maximum  rate of (i) 20%, if the  noncorporate
U.S.  Holder's  holding period in respect of the Amended Warrant is more than 18
months at the time of such  disposition,  or (ii) 28%, if the noncorporate  U.S.
Holder's holding period in respect of the Amended Warrant is more than one year,
but not more than 18 months,  at the time of such  disposition.  Certain pending
legislation  would reduce the holding  period for the maximum 20% rate from more
than 18 months  to more than one year.  The  ability  to use  capital  losses to
offset ordinary income in determining taxable income generally is limited.

Exercise of Amended Warrant

     In  general,  no gain or loss will be  recognized  on the receipt of Common
Stock pursuant to an exercise of an Amended Warrant, except to the extent a U.S.
Holder  receives cash in lieu of fractional  shares of stock.  The tax basis for
the Common Stock  received  upon such  exercise  will be equal to the sum of the
U.S. Holder's tax basis in the Amended Warrant exercised (reduced by the portion
of such tax  basis  allocable  to any  fractional  shares  paid in cash) and the
exercise price.  The holding period for any Common Stock received on exercise of
an Amended Warrant will begin on the date the Amended Warrant is exercised.

Lapse of Amended Warrant

     If an Amended  Warrant lapses  unexercised,  the U.S. Holder will recognize
loss in an amount equal to the U.S.  Holder's tax basis in the Amended  Warrant.
Such loss will be long-term  capital loss if the U.S.  Holder's  holding  period
exceeds one year.

     Sale,  Exchange,  or  Redemption  of Common  Stock  Received on Exercise of
Amended Warrant

     A sale, exchange, or redemption of Common Stock received on the exercise of
an Amended  Warrant  generally  will result in taxable gain or loss equal to the
difference  between the amount  realized and the U.S.  Holder's tax basis in the
Common  Stock.  Such gain or loss will be long-term  capital gain or loss if the
U.S.  Holder's  holding period in the Common Stock exceeds one year. In the case
of a U.S.  Holder that is a noncorporate  taxpayer,  any such long-term  capital
gain will  generally be subject to U.S.  federal income tax at a maximum rate of
(i) 20%, if the  noncorporate  U.S.  Holder's  holding  period in respect of the
Common  Stock is more than 18 months  at the time of such  disposition,  or (ii)
28%, if the noncorporate  U.S.  Holder's holding period in respect of the Common
Stock is more than one year,  but not more than 18  months,  at the time of such
disposition. Certain pending legislation would reduce the holding period for the
maximum 20% rate from more than 18 months to more than one year.  The ability to
use capital  losses to offset  ordinary  income in  determining  taxable  income
generally is limited.

Backup Withholding

     A U.S.  Holder may be subject to backup  withholding tax at the rate of 31%
with  respect to  dividends  paid on or the  proceeds  of a sale,  exchange,  or
redemption of a share of Common Stock or an Amended Warrant unless (i) such U.S.
Holder is a corporation  or comes within  certain other exempt  categories  and,
when required, demonstrates this fact or (ii) provides a taxpayer identification
number,  certifies  as to no loss of  exemption  from  backup  withholding,  and
otherwise complies with applicable backup  withholding  rules. The Company,  its
agent,  a broker or a paying  agent,  as the case may be,  will be  required  to
deduct and withhold any such backup  withholding tax. Backup  withholding is not
an additional tax and may be credited against the taxpayer's U.S. federal income
tax liability, provided that the required information is furnished.


                                  LEGAL MATTERS

     The validity of the shares of Common Stock offered hereby and certain other
matters  will be passed upon for the Company by  Cadwalader,  Wickersham & Taft,
New York, New York.

                                     EXPERTS

     The  consolidated  financial  statements  of the Company  appearing  in the
Company's  Annual  Report (Form 10-K) for the year ended  December 31, 1997 have
been audited by Ernst & Young LLP, independent  auditors,  as set forth in their
report  thereon  included  therein and  incorporated  herein by reference.  Such
consolidated  financial  statements  are  incorporated  herein by  reference  in
reliance  upon such report  given upon the  authority of such term as experts in
accounting and auditing.

     No  dealer,  salesman  or any  other  person  is  authorized  to  give  any
information  or to make  any  representations  other  than  those  contained  or
incorporated  by  reference  in this  Prospectus,  and if given  or  made,  such
information  or  representations  should  not be  relied  upon  as  having  been
authorized.  This  Prospectus  does  not  constitute  an  offer  to  sell,  or a
solicitation  of an offer to buy the  shares of  Common  Stock  offered  by this
Prospectus,  by  anyone  in any  jurisdiction  in  which  such  offer to sell or
solicitation is not authorized,  or in which the person making such offer is not
qualified to do so or to any person to whom it is unlawful to make such offer or
sell  or   solicitation.   Neither  the  delivery  of  the  Prospectus  nor  any
distribution   of  shares  pursuant  to  this   Prospectus   shall,   under  any
circumstances,  create  any  implication  that  there  has been no change in the
information set forth or  incorporated by reference  herein or in the affairs of
the Company since the date of this Prospectus.



<PAGE>


                                Table of Contents


AVAILABLE INFORMATION


INCORPORATED BY REFERENCE


RISK FACTORS


THE COMPANY


PLAN OF DISTRIBUTION


INFORMATION AGENT


USE OF PROCEEDS


DESCRIPTION OF SECURITIES


CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS


LEGAL MATTERS


EXPERTS


<PAGE>


                                     PART II


5.   MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.

     Effective  November  19,  1996,  the  Company's  Common  Stock and Warrants
commenced  trading on the NASDAQ  Market  under the symbols  "OXGN" and "OXGNW,"
respectively.  Prior  thereto,  since the  completion of the  Company's  initial
public  offering in August 1993,  the Company's  securities  had been listed for
quotation on the Nasdaq Small-Cap  Market.  The Company's shares of Common Stock
are also traded on the Stockholm  Stock Exchange in Sweden.  The following table
sets forth the high and low per share and per warrant  prices for the  Company's
Common Stock and Warrants for each  quarterly  period within the two most recent
fiscal years.

                                      Common Stock
                                      ------------
Calendar Year                      High            Low
- -------------                      ----            ---

1996
First Quarter                     $23.38         $ 9.25
Second Quarter                     32.63          17.63
Third Quarter                      27.00          17.00
Fourth Quarter                     26.70          22.00

1997
First Quarter                     $36.25         $22.63
Second Quarter                     35.00          26.25
Third Quarter                      41.88          24.00
Fourth Quarter                     29.25          15.25

1998
First Quarter                     $18.75         $14.25
Second Quarter                     19.88           9.50
Third Quarter (through             12.88          11.75
July 6, 1998)



                                           Warrants
                                           --------
Calendar Year                      High                 Low
- -------------                      ----                 ---

1996
First Quarter                     $15.50              $ 2.88
Second Quarter                     24.00               10.25
Third Quarter                      18.00                8.63
Fourth Quarter                     15.50               11.00

1997
First Quarter                     $26.25              $12.25
Second Quarter                     25.25               15.56
Third Quarter                      29.25               15.25
Fourth Quarter                     18.50                6.50

1998
First Quarter                      $9.38               $5.00
Second Quarter                      7.00                2.38
Third Quarter (through              3.00                2.50
July 6, 1998)


     On July 6, 1998, the last sale price for the Warrants was $2.50 per Warrant
and the last sale  price for the Common  Stock was  $11.8125  per share,  all as
reported by NASDAQ.

     As of July 6, 1998, there were 41 holders of record of the Company's Common
Stock  and  three  holders  of record of the  Company's  Warrants.  The  Company
believes,  based  on the  number  of  proxy  statements  and  related  materials
distributed  in connection  with its 1997 Annual Meeting of  Stockholders,  that
there are more than 9,000 beneficial owners of its Common Stock.

     The Company has not declared  any cash  dividends on its Common Stock since
its  inception  in 1988,  and  does not  intend  to pay  cash  dividends  in the
foreseeable future. The Company presently intends to retain future earnings,  if
any, to finance the growth and development of its business.


Item 14.  Other Expenses of Issuance and Distribution.

     The fees  and  expenses  payable  by the  Company  in  connection  with the
issuance and  distribution  of the shares of Common Stock being  registered  are
estimated as follows:

                                                          Amount

Accounting Fees and Expenses.........................      $   *
                                                            ----
Legal Fees and Expenses..............................          *
                                                            ----
Blue Sky Filing Fees and Expenses....................          *
                                                            ----
Miscellaneous  expenses,   including  the  Information
Agent and Warrant Agent fees and expenses                      *
                                                            ----


                             Total....................         *
                                                            ----
- ---------
[FN]
*   To be supplied by amendment.



Item 15.  Indemnification of Directors and Officers.

     The Company is a Delaware corporation.  Reference is made to Section 145 of
the  Delaware  General  Corporate  Law  (the  "DGCL"),  which  provides  that  a
corporation  may  indemnify any person who was or is a party or is threatened to
be made a party 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  an  officer,  director,  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  such  officer,
director,  employee or agent  acted in good faith and in a manner he  reasonably
believed to be in or not opposed to the  corporation's  best  interests and, for
criminal  proceedings,  had no reasonable  cause to believe that his conduct was
unlawful.  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.  Where an  officer  or
director is  successful  on the merits or otherwise in the defense or any action
referred to above,  the corporation must indemnify him against the expenses that
such officer or director actually and reasonably incurred.

     Reference  is also made to  Section  102(b)7 of the DGCL,  which  enables a
corporation  in its  certificate  of  incorporation  to  eliminate  or limit the
personal  liability  of a director for monetary  damages for  violations  of the
director's  fiduciary duty,  except (i) for any breach of the director's duty of
loyalty to the corporation or its  stockholders,  (ii) for acts or omissions not
in good faith or which involve intentional  misconduct or a knowing violation of
law,  (iii)  pursuant to Section 174 of the DGCL  (providing  for  liability  of
directors  for  unlawful  payment of dividends  or unlawful  stock  purchases or
redemptions)  or (iv) for any  transaction  from  which a  director  derived  an
improper personal benefit.

     Article IX, Section 3 of the Company By-Laws provides as follows:

               "SECTION  3.  Indemnification.  The  Corporation  shall,  to  the
          fullest extent  permitted by the General  Corporation Law of the State
          of Delaware,  indemnify members of the Board and may, if authorized by
          the Board,  indemnify its  officers,  employees and agents and any and
          all persons whom it shall have power to indemnify  against any and all
          expenses, liabilities or other matters."

     ARTICLE  NINTH  of the  Company's  Restated  Certificate  of  Incorporation
provides as follows:

               "To the fullest extent  permitted by the General  Corporation Law
          of the State of  Delaware,  no  director of the  Corporation  shall be
          personally  liable to the Corporation or its stockholders for monetary
          damages  for  breach  of  fiduciary  duty as a  director,  except  for
          liability (i) for any breach of the director's  duty of loyalty to the
          Corporation  or its  stockholders,  (ii) for acts or omissions  not in
          good  faith  or  that  involve  intentional  misconduct  or a  knowing
          violation of law,  (iii) under Section 174 of the General  Corporation
          Law of the State of Delaware,  or (iv) for any transaction  from which
          the  director  derived an  improper  personal  benefit.  Any repeal or
          modification  of  this  Article  Ninth  by  the  stockholders  of  the
          Corporation  shall not  adversely  affect any right or protection of a
          director  of the  Corporation  existing  at the time of such repeal or
          modification with respect to acts or omissions occurring prior to such
          repeal or modification."

     The  Underwriting  Agreement  dated August 26, 1993 between the Company and
RAS Securities Corp. and ABD Securities  Corporation,  as representatives of the
several underwriters named in Schedule A thereto (the "Underwriters"),  contains
provisions under which the Company and the Underwriters have agreed to indemnify
each other  (including  officers and directors of the Company)  against  certain
liabilities under the Securities Act.

     Insofar as indemnification for liabilities arising under the Securities Act
may be  permitted  to  directors,  officers or persons  controlling  the Company
pursuant to the foregoing provisions,  the Company has been informed 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.

Item 16.  Exhibits

4.1*      Form of Warrant  Agreement  between  the Company  and  American  Stock
          Transfer  Trust  Company  as  Transfer  Agent and  Warrant  Registrant
          ("AST") (including form of Warrant Certificate)

4.2**     Amendment to Warrant  Agreement dated September 19, 1994,  between the
          Company and AST amending the Warrant Agreement

4.3       Amendment  to Warrant  Agreement  dated  July 8,  1998,  between  the
          Company and AST amending the Warrant Agreement

23.1      Consent of Ernst & Young LLP, New York, New York

23.2      Consent of Cadwalader, Wickersham & Taft

99.1      Form of Letter to Warrantholders

99.2      Form of Questions and Answers about the Amendments of the Warrants

- -------------  
[FN]
*         Incorporated by reference to the Company's  Registration  Statement on
          Form S-1 (File No. 33-64968) and any amendments thereto.

**        Incorporated  by reference to the Company's  Post-Effective  Amendment
          No. 2 on Form S-3 to Form S-1 Registration Statement,  dated September
          30, 1994.


Item 17.  Undertakings

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors,  officers and controlling  persons of the Company
pursuant  to the  provisions  described  above in Item 15, the  Company 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 Company of expenses
incurred or paid by a director,  officer or controlling person of the Company 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 Company  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  of whether  such  indemnification  by it is against
public  policy as  expressed in the  Securities  Act and will be governed by the
final adjudication of such issue.

     The undersigned Company hereby undertakes:

               (1) To file, during any period in which offers or sales are being
          made, a  post-effective  amendment to this  registration  statement 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 the 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; and

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

     The undersigned Company hereby undertakes that, for purposes of determining
any liability  under the  Securities  Act,  each filing of the Company's  annual
report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act
of 1934 (and, where applicable, each filing of an employee benefit plan's annual
report pursuant to section 15(d) of the Securities Exchange Act of 1934) 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.

     The undersigned Registrant hereby undertakes that:

               (1)  For  purposes  of  determining   any  liability   under  the
          Securities  Act, the  information  omitted from the form of prospectus
          filed as part of this  registration  statement  in reliance  upon Rule
          430A and  contained in a form of  prospectus  filed by the  Registrant
          pursuant to Rule  424(b)(1) or (4) or 497(h) under the  Securities Act
          shall be deemed to be part of this  registration  statement  as of the
          time its was declared effective.

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



<PAGE>






                                   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 has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized  in the City of  Stockholm,  Sweden or in the City of New  York,  New
York, on July 8, 1998.

                                       OXiGENE, INC.


                                       By: /s/ Bjorn Nordenvall
                                           -----------------------------------
                                           Bjorn Nordenvall
                                           President and Chief Executive Officer


     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report has been signed by the following  persons on behalf of the registrant and
in the capacities and on the dates indicated.

<TABLE>
<CAPTION>

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

                                                President, Chief Executive Officer                July 8, 1998
/s/ Bjorn Nordenvall                            and Director (principal executive
- -----------------------                                       officer)
Bjorn Nordenvall                                               

                                                       
/s/ Bo Haglund                                         Chief Financial Officer                      July 8, 1998
- -----------------------
Bo Haglund

                                                               
/s/ Marvin H. Caruthers                                        Director                             July 8, 1998
- -----------------------
Marvin H. Caruthers

                                                               
/s/ Michael Ionata                                             Director                             July 8, 1998
- ------------------------
Michael Ionata

                                                               
                                                               Director                            July __, 1998
- ------------------------
Arthur Laffer

                                                               
/s/ Ronald W. Pero                                             Director                             July 8, 1998
- ------------------------
Ronald W. Pero

                                                               
/s/ Per-Olaf Soderberg                                         Director                             July 8, 1998
- ------------------------
Per-Olof Soderberg

                                                               
/s/ Gerald A. Eppner                                           Director                             July 8, 1998
- ------------------------
Gerald A. Eppner

</TABLE>





                                                                     Exhibit 4.2
                                  OXiGENE, INC.
                          One Copley Place, Suite 602,
                                Boston, MA 02116

                                  July 8, 1998

American Stock Transfer & Trust Company
6201 15th Avenue
3rd Fl.
Brooklyn, New York  11219
Attn:  Herb Lemmer

                  Re:  Amendment to Warrant Agreement
                       ------------------------------

Gentlemen:

     Reference  is made to the  Warrant  Agreement,  dated  August 26, 1994 (the
"Agreement"),  by  and  between  OXiGENE,  Inc.,  a  Delaware  corporation  (the
"Company") and American Stock Transfer & Trust Company (the "Warrant  Agent") in
its capacity as the Company's transfer agent and warrant  registrar,  as amended
by letter agreement dated September 19, 1994.

     Pursuant to Section 10 of the Agreement,  the Company hereby  solicits your
consent to an amendment of the terms of the Warrants as follows.

     On July 8, 1998,  the  Company and the  Warrant  Agent  amended the Warrant
Agreement  to provide  that (a) at 5:00  p.m.,  New York City time on August 26,
1998,  with no action  required to be taken by the holders of the Warrants,  the
Original  Expiration  Date will be extended (the  "Extension") to 5:00 p.m., New
York City time,  December 31, 1999 (the  "Amended  Expiration  Date"),  (b) each
Warrant shall be exercisable on and after August 26, 1998, and until the Amended
Expiration Date, for 1.07 shares of Common Stock at a price of $14.35 (i.e., the
exercise price currently in effect),  subject only to adjustment after that date
in  accordance  with the  anti-dilution  provisions  set  forth  in the  Warrant
Agreement  (which are not being  amended) (the "Price  Amendment"),  and (c) the
Company has the right,  but not the  obligation,  at any time after the Original
Expiration Date, to redeem,  at any time or from time to time, any or all of the
Warrants (the "Call" and,  together with the Extension and the Price  Amendment,
the "Amendments");  provided, however, the Company may exercise the Call only if
(i) the average  trading price of the shares of the Company's  Common Stock,  as
reported by the National Market of the NASDAQ Stock Market,  Inc.SM  ("NASDAQ"),
for any period of ten consecutive  trading days (not including any days on which
there  are no  purchases  or sales of Common  Stock  but the  NASDAQ is open for
trading) has traded at not less than $16.00 per share,  and (ii) the Company has
given not less than 20 days written notice to the Warrantholders  indicating the
Company's  election to exercise the Call.  Following a Call,  any Warrants  that
were called that remain  unexercised at the end of the 20-day notice period will
be redeemed  promptly  thereafter  at a  redemption  price of $.001 per Warrant,
payable by the Company in cash.

     The Warrantholders need take no action in connection with the Amendments to
the Warrant Agreement,  which apply to all outstanding Warrants.  Warrantholders
need not turn in the certificates  evidencing their Warrants that do not reflect
the Amendments  (the "Original  Warrant  Certificates")  even after the Original
Expiration Date. However,  after the Original Expiration Date, any Warrantholder
has the right,  but not the  obligation,  at the  Warrantholder's  election,  to
surrender  Original  Warrant  Certificates  to  the  Warrant  Agent  which  will
thereupon be replaced  with  certificates  evidencing  Warrants  containing  the
Amendments (the "Revised Warrant Certificates"). In addition, after the Original
Expiration Date, Revised Warrant  Certificates will be issued in connection with
(a) any transfer of Warrants evidenced by Original Warrant Certificates or (b) a
partial exercise of Warrants evidenced by Original Warrant Certificates.



<PAGE>





     Please  signify  your  agreement  with the  terms  hereof  by  signing  and
returning this original to the Company, keeping a duplicate copy for your files.


                                  Yours truly,

                                  OXiGENE, Inc.

                                  By: /s/ Bjorn Nordenvall
                                      ---------------------
                                      Bjorn Nordenvall
                                      President and Chief Executive Officer

ACCEPTED AND AGREED TO
this 8th day of July, 1998

AMERICAN STOCK TRANSFER & TRUST COMPANY

By:  /s/ Herbert J. Lemmer
     ---------------------
     Name:  Herbert J. Lemmer
     Title:   Vice President





                                File No. 33-64968


                                                                   Exhibit 23.1

                         CONSENT OF INDEPENDENT AUDITORS


We  consent  to the  reference  to our  firm  under  the  caption  "Experts"  in
post-effective   amendment  No.  3  on  Registration  Statement  (Form  S-3)  to
Registration  Statement  (Form  S-1 No.  33-64968)  and  related  Prospectus  of
OXiGENE,  Inc.  for the  registration  of  shares  of  common  stock  underlying
outstanding warrants and to the incorporation by reference therein of our report
dated  January 12, 1998,  with respect to the  financial  statements of OXiGENE,
Inc.  included in its Annual Report (Form 10-K) for the year ended  December 31,
1997, filed with the Securities and Exchange Commission.




                                                       /s/ Ernst & Young LLP
                                                     ERNST & YOUNG LLP

New York, New York
July 6, 1998






                                                                    Exhibit 23.2



                    CONSENT OF CADWALADER, WICKERSHAM & TAFT



Cadwalader, Wickersham & Taft hereby consents to the reference to our firm under
the caption "Legal Matters" in the form of Prospectus included in Post-Effective
Amendment  No.  3 on Form  S-3 to Form  S-1  Registration  Statement  (File  No.
33-64968) of OXiGENE, Inc.


                                              /s/  Cadwalader, Wickersham & Taft



New York, New York
July 8, 1998



                                                                   Exhibit 99.1


                              [OXiGENE LETTERHEAD]




[Name]
[Address]



Dear [Name]:

OXiGENE,  Inc. is pleased to inform its  Warrantholders  that, as more fully set
forth in the  accompanying  prospectus,  certain terms of the Warrants have been
amended,  including:  (a) at 5:00 p.m.,  New York City time on August 26,  1998,
with no action required to be taken by the holders of the Warrants, the original
expiration  date of the  Warrants  (August 26, 1998) (the  "Original  Expiration
Date") will be extended to 5:00 p.m., New York City time, December 31, 1999, (b)
each Warrant will be  exercisable  on and after August 26, 1998, for 1.07 shares
of Common  Stock at a price of $14.35  (i.e.,  the exercise  price  currently in
effect),  subject  only to  adjustment  after that date in  accordance  with the
anti-dilution provisions set forth in the Warrant Agreement (which are not being
amended), and (c) the Company has the right, but not the obligation, at any time
after the Original Expiration Date, to redeem, at any time or from time to time,
any or all of the Warrants;  provided, however, that outstanding Warrants can be
called for  redemption  by the Company only if (i) the average  trading price of
the shares of the Company's  Common Stock, as reported by the National Market of
the NASDAQ Stock Market,  Inc.SM  ("NASDAQ"),  for any period of ten consecutive
trading days (not including any days on which there are no purchases or sales of
Common  Stock but the NASDAQ is open for  trading) has been not less than $16.00
per share,  and (ii) the Company has given not less than 20 days written  notice
to the Warrantholders indicating the Company's election to exercise its call for
redemption  of  Warrants.  All other  terms  and  conditions  applicable  to the
Warrants remain unchanged and no action is required to be taken on your part.

If you have any questions regarding these changes, you may contact Innisfree M&A
Incorporated,  501 Madison Avenue,  20th Floor, New York, New York, 10022, (888)
750-5834.

Best regards,

OXiGENE, Inc.


By:  ____________________________
         Name:
         Title:







                                                                    Exhibit 99.2




           QUESTIONS AND ANSWERS ABOUT THE AMENDMENTS OF THE WARRANTS


Q:       What are the terms of the Warrant amendments?

A:   The primary  amendments  are:  (i) the  expiration  date of the Warrants of
     OXiGENE, Inc. (the "Company") is extended from August 26, 1998, to December
     31,  1999,  and (ii) the Company will have the right to redeem the Warrants
     at any time after the close of business  (5:00 p.m., New York City time) on
     August  26,  1998  (the  "Original  Expiration  Date"),   provided  certain
     conditions  are met.  These  conditions  are that the  market  price of the
     Common Stock be at least $16.00 per share for ten consecutive  trading days
     and that the Warrantholders receive not less than 20 days advance notice in
     order that they have the time to  consider  whether  they wish to  exercise
     their Warrants for Common Stock before the Warrants are redeemed.

Q:   Are there any other changes of the terms of the Warrants?

A:   All other terms of the Warrants remain the same.

Q:   Can the  Warrantholders  exercise the Warrants after the Company has called
     the Warrants for redemption?

A:   Yes, the Company may give its  Warrantholders not less than 20 days written
     notice  indicating its election to redeem the Warrants.  During such 20-day
     period, the Warrantholders shall have the right, but not the obligation, to
     exercise   their   Warrants.   It  is  the   Company's   expectation   that
     Warrantholders  would exercise their Warrants  following such notice if the
     market  price is  greater  than the  price at  which  the  Warrants  can be
     exercised for Common Stock.

Q:   If I do not exercise my Warrants  after the Company  exercises its call and
     the notice period has expired (which is not less than 20 days), what will I
     receive?

A:   Unexercised  Warrants that have been called will be redeemed promptly after
     the  20-day  notice  period at a  redemption  price of $.001  per  Warrant,
     payable by the Company in cash.

Q:   Is any  action  required  to be taken by  Warrantholders  or the  Company's
     stockholders?

A:   Neither  Warrantholders nor the Company's stockholders are required to take
     any action in connection with or as a result of these amendments.

Q.   Will new Warrant certificates be issued?

A:   New Warrant certificates will not automatically be issued.  However,  after
     August 26, 1998, new Warrant certificates will be issued in connection with
     (i) any  transfer of Warrants  evidenced  by the  certificates  that do not
     reflect  the  amendments  (the  "Original  Warrant  Certificates"),  (ii) a
     partial exercise of Warrants evidenced by the Original Warrant Certificates
     or (iii) upon the election of the Warrantholders.

Q:   When will the extension become effective?

A:   The extension  will become  effective at the close of business  (5:00 p.m.,
     New York  City  time) on  August  26,  1998.  Prior to that  time and date,
     existing  Warrants and the current Warrant  Agreement  remain in full force
     and effect.

Q:   What are the federal income tax consequences of the extension of Warrants?

A:   The Company believes that there are no U.S. federal income tax consequences
     related to the amendments discussed herein. However,  Warrantholders should
     read the Prospectus  carefully and, in any event, should consult with their
     own tax advisors.

Q:   Who can I talk to if I have more questions?

A:   If you have more questions about the Warrant extension,  please contact our
     Information Agent:

                                    Innisfree M&A Incorporated
                                    501 Madison Avenue, 20th Floor
                                    New York, New York  10022
                                    (888) 750-5834 in the U.S. or
                                    (212) 750-5834 from outside the U.S.


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