OXiGENE to Acquire VaxGen in a Stock-for-Stock Merger


Acquisition to Add Approximately $33 Million in Cash to OXiGENE's Balance Sheet

Conference Call Today at 9:00 AM Eastern

SOUTH SAN FRANCISCO, Calif., Oct. 15, 2009 (GLOBE NEWSWIRE) -- OXiGENE, Inc.
(Nasdaq:OXGN) (Stockholm:OXGN), a clinical-stage, biopharmaceutical company
developing novel therapeutics to treat cancer and eye diseases, and VaxGen,
Inc. (OTCBB:VXGN), a biopharmaceutical company, announced today that they have
entered into a definitive merger agreement pursuant to which OXiGENE will
acquire VaxGen in exchange for common stock of OXiGENE. Upon closing of the
transaction, VaxGen will become a wholly-owned subsidiary of OXiGENE, and
VaxGen stockholders will become stockholders of OXiGENE. 

At the closing of the transaction, OXiGENE will issue approximately 15.6
million shares of common stock in exchange for all outstanding shares of
VaxGen's common stock. The number of shares issued at closing will be subject
to adjustment if VaxGen's net cash, as of a date shortly before the closing, as
agreed by both parties, less certain expenses and liabilities, is greater or
less than approximately $33.2 million. Based upon the shares of common stock of
OXiGENE and VaxGen currently outstanding and assuming net cash at closing
equals the target net cash, the stockholders of VaxGen would receive
approximately 0.4719 shares of common stock of OXiGENE for each share of VaxGen
common stock. VaxGen currently estimates that its net cash at closing may be
below the target amount of net cash, depending on the timing of the closing and
the amount of VaxGen expenses. 

In addition to the initial shares issued to VaxGen stockholders, OXiGENE will
also place approximately 8.5 million shares of its common stock in escrow to be
released to VaxGen stockholders contingent upon the occurrence of certain
events over the two-year period following the closing. These events relate
primarily to settlement of VaxGen's obligations under its lease of facilities
in South San Francisco, and to the potential award of a procurement contract to
Emergent BioSolutions (NYSE:EBS) by the U.S. Government for which VaxGen is
eligible to receive milestone and royalty payments in connection with Emergent
BioSolutions' May 2008 acquisition of VaxGen's recombinant protective antigen
(rPA) anthrax vaccine product candidate and related technology. 

Immediately after the closing, VaxGen stockholders prior to the merger are
expected to own approximately 20% of the outstanding shares of the combined
company and OXiGENE stockholders are expected to own approximately 80%. If all
of the contingent shares are released, OXiGENE anticipates having approximately
87 million shares outstanding. Under these circumstances, VaxGen stockholders
prior to the merger would be expected to own approximately 28% percent of the
outstanding shares of the combined company and the current OXiGENE stockholders
would be expected to own approximately 72% percent, assuming no further
issuances of stock by OXiGENE. 

"OXiGENE's mission is to develop new and improved therapeutics based on our
vascular disrupting agent (VDA) technology that has the potential to deliver
significant medical benefits to patients with cancer and sight-threatening eye
diseases and conditions. We believe these programs will be significantly
strengthened by the addition of approximately $33 million of cash," said Peter
Langecker, M.D., Ph.D., OXiGENE's interim Chief Executive Officer. "This
transaction represents a timely and efficient strategy to strengthen our cash
position and fund operations into 2011. In addition to the benefit of an
immediate infusion of significant cash which strengthens our ability to fund
our clinical development programs, we believe that there is potential upside in
this transaction in the form of milestones and royalties should the rPA anthrax
vaccine be selected for government stockpiling. We want to welcome our
prospective new stockholders and board members and look forward to their
support and sharing our progress with them." 

"We believe that this merger transaction with OXiGENE represents an excellent
strategy to maximize the value of VaxGen's remaining tangible and intangible
assets and to provide our stockholders with the opportunity to participate in
OXiGENE's potential success as a leader in the development of promising new
agents for cancer and eye diseases," said James Panek, President of VaxGen. 

The merger agreement has been approved unanimously by the boards of directors
of both OXiGENE and VaxGen. The merger is subject to customary closing
conditions, including approval by both OXiGENE's and VaxGen's stockholders. As
of June 30, 2009, VaxGen's unaudited cash, cash equivalents and marketable
securities balance was approximately $36 million and its liabilities and
contractual obligations consisted primarily of costs and expenses of its
outstanding leases related to its former biopharmaceutical manufacturing
operations located in South San Francisco, CA. 

Upon the closing, two members of VaxGen's board of directors will be appointed
to OXiGENE's board of directors: Lori F. Rafield, Ph.D., a consultant to the
biotechnology industry, and Franklin M. Berger, a former biotechnology analyst. 

The transaction is expected to be completed in the first quarter of 2010.
OXiGENE is receiving a fairness opinion in this transaction from Houlihan
Lokey, and VaxGen is receiving a fairness opinion from Aquilo Partners. 

Details of the Proposed Stock-for Stock Transaction 

Upon closing of the transaction, based upon the anticipated net cash balance of
VaxGen at closing and the current number of OXiGENE's common shares
outstanding, OXiGENE will issue approximately 15.6 million shares of newly
issued common stock, subject to adjustment as set forth in the merger
agreement, in exchange for all of VaxGen's outstanding common stock. All of
VaxGen's outstanding stock options will be canceled immediately prior to the
closing and all of VaxGen's outstanding warrants, to the extent not terminated
prior to the closing, will be assumed by OXiGENE. OXiGENE will also place an
additional approximately 8.5 million shares of newly issued common stock in
escrow to be issued contingent upon certain occurrences over the two-year
period following the closing. 

Of the 8.5 million shares placed in escrow, approximately 2.7 million shares
relate primarily to the potential settlement of VaxGen's lease facility
obligation. If the outstanding lease obligation and related costs are reduced
either before the closing or during the two-year period following the closing,
OXiGENE will release additional shares from escrow to the VaxGen stockholders
depending on the amount of the lease settlement arrangements. 

The remaining 5.8 million shares to be held in escrow will be released to
VaxGen's stockholders in the event that VaxGen (as a subsidiary of OXiGENE),
within two years following the closing of the transaction, becomes entitled to
receive a $3 million milestone payment from Emergent BioSolutions in connection
with the award of a procurement contract to Emergent by the United States
government for supply of rPA anthrax vaccine. In the event this milestone is
achieved, OXiGENE will release from escrow approximately 1.9 million shares,
plus additional shares based on the size of the contract awarded to Emergent.
OXiGENE will be entitled to receive additional milestone payments based on net
sales as well as royalties from sales of rPA anthrax vaccine for a period of 12
years from commercial sale, with no obligation to issue additional shares to
VaxGen stockholders. If the award of the procurement contract is announced
prior to the closing, VaxGen will receive credit for the $3 million milestone
payment in calculating net cash at closing, and OXiGENE will issue to VaxGen
stockholders at the closing additional shares based on the size of the contract
awarded to Emergent. 

In connection with the Merger Agreement, VaxGen entered into voting agreements
with OXiGENE and certain executive officers, directors and stockholders of
OXiGENE, and OXiGENE entered into voting agreements with VaxGen and certain
executive officers and directors of VaxGen pursuant to which these parties
agreed to vote in favor of the adoption of the merger agreement and against
approval of any proposal opposing or in competition with the consummation of
the Merger. 

Conference Call Today 

Members of OXiGENE's and VaxGen's management teams will discuss the VaxGen
merger transaction and provide a corporate update via a webcast and conference
call today at 9:00 a.m. EDT (6:00 a.m. PDT). To listen to a live or an archived
version of the audio webcast, please log on to the OXiGENE's website,
www.oxigene.com. Under the "Investors" tab, select the link to "Events and
Presentations." You may also listen to an archived version of the audio webcast
by logging onto VaxGen's website at www.vaxgen.com. The conference call can
also be heard live by dialing 800-946-0719 in the United States and Canada, and
719-325-2258 for international callers, five minutes prior to the beginning of
the call. 

A replay will be available starting at 11:00 a.m. EDT, (8:00 a.m. PDT) on
October 15, 2009 and ending at midnight EDT (9:00 p.m. PDT) on October 29. To
access the replay, please dial 888-203-1112 if calling form the United States
or Canada, or 719-457-0820 from international locations. Please refer to replay
passcode 7768134. 

About OXiGENE 

OXiGENE is a clinical-stage biopharmaceutical company developing novel
therapeutics to treat cancer and eye diseases. The company's major focus is
developing vascular disrupting agents (VDAs) that selectively disrupt abnormal
blood vessels associated with solid tumor progression and visual impairment.
OXiGENE is dedicated to leveraging its intellectual property and therapeutic
development expertise to bring life-extending and life-enhancing medicines to
patients. 

The OXiGENE, Inc. logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=4969 

About VaxGen 

VaxGen is a biopharmaceutical company based in South San Francisco, California.
The company owns a state-of-the-art biopharmaceutical manufacturing facility
with a 1,000-liter bioreactor that can be used to make cell culture or
microbial biologic products. The facility is contained within leased premises.
For more information, please visit the company's web site at
http://www.vaxgen.com. 

Forward-Looking Statements 

This news release contains forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995 about OXiGENE and VaxGen. Such
statements include, but are not limited to, statements about the proposed
transaction and its potential benefits to the OXiGENE and VaxGen stockholders,
the expected timing of the completion of the transaction, the combined
company's plans, objectives, expectations and intentions with respect to future
operations and products and other statements that are not historical in nature,
particularly those that utilize terminology such as "will," "potential",
"could," "can," "believe," "intends," "continue," "plans," "expects,"
"estimates" or comparable terminology. Forward-looking statements are based on
current expectations and assumptions, and entail various known and unknown
risks and uncertainties that could cause actual results to differ materially
from those expressed in such forward-looking statements. Important factors
known to OXiGENE and VaxGen that could cause actual results to differ
materially from those expressed in such forward-looking statements include
general business and economic conditions; the failure of the VaxGen or OXiGENE
stockholders to approve the transaction or the failure of either party to meet
any of the other conditions to the closing of the transaction; the failure to
realize the anticipated benefits from the transaction or delay in realization
thereof; OXiGENE's need for and ability to obtain additional financing; the
difficulty of developing pharmaceutical products, obtaining regulatory and
other approvals; and the uncertainty regarding achieving market acceptance of
any products for which OXiGENE succeeds in gaining regulatory approvals.
Additional factors that could cause OXiGENE's and VaxGen's results to differ
materially from those described in the forward-looking statements can be found
in OXiGENE's and VaxGen's most recent annual reports on Form 10-K and
subsequent quarterly reports on Form 10-Q and other filings with the Securities
and Exchange Commission, which are filed with the SEC and available at the
SEC's web site at www.sec.gov and which discussions also are incorporated
herein by reference. The information set forth herein speaks only as of the
date hereof, and OXiGENE and VaxGen disclaim any intention and do not assume
any obligation to update or revise any forward looking statement, whether as a
result of new information, future events or otherwise. 

Important Additional Information Will Be Filed with the SEC 

This press release may be deemed to be solicitation material regarding the
proposed merger of VaxGen and OXiGENE. In connection with the proposed merger,
OXiGENE intends to file with the SEC a registration statement on Form S-4,
which will include a joint proxy statement/prospectus of OXiGENE and VaxGen and
other relevant materials in connection with the proposed transactions and each
of OXiGENE and VaxGen intend to file with the SEC other documents regarding the
proposed transaction. The final joint proxy statement/prospectus will be mailed
to the stockholders of OXiGENE and VaxGen. INVESTORS AND SECURITY HOLDERS OF
OXIGENE AND VAXGEN ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS
(INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND THE OTHER RELEVANT
MATERIAL CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY
WILL CONTAIN IMPORTANT INFORMATION ABOUT OXIGENE, VAXGEN AND THE PROPOSED
TRANSACTION. 

The joint proxy statement/prospectus and other relevant materials (when they
become available), and any and all documents filed with the SEC, may be
obtained free of charge at the SEC's web site at www.sec.gov. In addition,
investors and security holders may obtain free copies of the documents filed
with the SEC by OXiGENE by directing a written request to OXiGENE, Inc., 701
Gateway Boulevard, Suite 210, South San Francisco, CA 94080, Attention:
Investor Relations and by VaxGen by directing a written request to VaxGen,
Inc., 379 Oyster Point Boulevard, Suite 10, South San Francisco, CA 94080,
Attention: Investor Relations. 

OXiGENE, VaxGen and their respective executive officers and directors and other
persons may be deemed to be participants in the solicitation of proxies from
the stockholders of OXiGENE and VaxGen in connection with the proposed merger.
Information about the executive officers and directors of OXiGENE and their
ownership of OXiGENE common stock is set forth in OXiGENE's annual report on
Form 10-K for the year ended December 31, 2008, filed with the SEC on March 30,
2009 and its proxy statement for its 2009 annual meeting of stockholders, which
was filed with the SEC on April 7, 2009. Information regarding VaxGen's
directors and executive officers is available in its annual report on Form 10-K
for the year ended December 31, 2008, filed with the SEC on March 18, 2009 and
the proxy statement for VaxGen's 2008 annual meeting of stockholders, filed
with the SEC on November 10, 2008. Certain directors and executive officers of
VaxGen may have direct or indirect interests in the merger due to securities
holdings, pre-existing or future indemnification arrangements and rights to
severance payments if their employment is terminated prior to or following the
merger. If and to the extent that any of the OXiGENE or VaxGen participants
will receive any additional benefits in connection with the merger that are
unknown as of the date of this filing, the details of those benefits will be
described in the definitive joint proxy statement/prospectus relating to the
merger. Investors and security holders may obtain additional information
regarding the direct and indirect interests of OXiGENE, VaxGen and their
respective executive officers and directors in the merger by reading the joint
proxy statement/prospectus regarding the merger when it becomes available. 

CONTACT:  OXiGENE, Inc.
          Investor and Media Contact:
          Michelle Edwards, Investor Relations
          650-635-7006
          medwards@OXiGENE.com

          VaxGen, Inc.
          James Panek, President
          650-624-2368
          jpanek@vaxgen.com