Exhibit 99.1
Contact
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INVESTOR RELATIONS                                 MEDIA RELATIONS
John Calhoun, MD, MBA                              Susan W. Specht, MBA
Director, Corporate Communications                 Associate Director, Corporate
& Investor Relations                               Communications
(206) 442-6744                                     (206) 442-6592

FOR IMMEDIATE RELEASE
- ---------------------

     ZYMOGENETICS REPORTS FOURTH QUARTER AND YEAR END 2006 FINANCIAL RESULTS

             - Investment in pipeline yields substantial progress in
                             clinical development -

Seattle, February 15, 2007 -- ZymoGenetics, Inc. (NASDAQ: ZGEN) today reported
its financial results for the fourth quarter and year ended December 31, 2006.
For the fourth quarter of 2006, the company reported a net loss of $37.1
million, or $0.55 per share, compared to a net loss of $15.1 million, or $0.23
per share, for the prior year period. For the full year 2006, the company
reported a net loss of $130.0 million, or $1.94 per share, compared to a net
loss of $78.0 million, or $1.28 per share, for the prior year. The increases
were consistent with the company's strategy of aggressively investing in the
advancement of its broad pipeline of product candidates.

ZymoGenetics ended the year in a strong financial position, with $258.4 million
of cash, cash equivalents and short-term investments.

"All of our product development programs made substantial progress in 2006,"
stated Bruce L.A. Carter, Ph.D., President and Chief Executive Officer of
ZymoGenetics. "With the positive Phase 3 results and BLA filing for rhThrombin,
we've laid the groundwork for commercialization. Phase 2 clinical trials are
ongoing for atacicept and IL-21, and both programs are expected to broaden this
year. In addition, we're very excited about the potential of PEG-interferon
lambda, which has begun Phase 1 testing."

ZymoGenetics reported 2006 revenues of $25.4 million for the full year and $4.4
million for the fourth quarter, compared to $42.9 million and $15.4 million for
the prior year and quarter, respectively. Most of the revenue decrease related
to revenue from license fees and milestone payments. Several large milestone
payments were earned in 2005, whereas corresponding amounts were not earned in
2006. Also, the revenue recognition period for a recombinant Factor XIII license
fee, received from Novo Nordisk in 2004, ended in the second quarter of 2006.
Previously, the company had recorded revenue of $2.3 million per quarter under
this license over the period of its related continuing obligations. Option fee
revenue also decreased due to the November 2006 expiration of an option and
license agreement with Novo Nordisk, under which the company had earned $7.5
million per year over a six-year term.

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                                              ZymoGenetics 2006 Year-End Results
                                                                         2/15/07
                                                                     Page 2 of 6

Research and development expenses in 2006 increased by 29% to $128.5 million for
the full year and $33.8 million for the fourth quarter, compared to $99.6
million and $26.2 million reported for the prior year and quarter, respectively.
There has been substantial growth and expansion of the company's product
development capabilities over the past year, including the hiring of experienced
development personnel. A significant portion of the increases resulted from
growth in headcount and related costs. Other substantial cost increases related
to the manufacture of rhThrombin and fees for filing the rhThrombin Biologics
License Application (BLA) with the FDA. Additionally, pursuant to new stock
option accounting rules that took effect in 2006, stock-based compensation
expense of $3.2 million was recorded for the fourth quarter and $12.1 million
was recorded for the full year.

General and administrative expenses in 2006 totaled $33.2 million for the year
and $9.1 million for the fourth quarter, which compares to $23.3 million and
$5.8 million reported for the prior year and quarter, respectively. The primary
factor contributing to these increases was stock-based compensation expense,
which was responsible for $6.3 million of the increase for the year and $1.8
million of the increase for the fourth quarter. Other factors responsible for
the increases included personnel costs, patent and legal fees and consulting
fees.

Net other income for the fourth quarter of 2006 was comparable to the amount for
the fourth quarter of 2005. For the full year 2006, net other income increased
to $6.3 million, from $2.0 million for the prior year. This increase reflects
higher investment income, which was largely driven by higher rates of interest
earned on investments.

2006 HIGHLIGHTS

During 2006, ZymoGenetics made the following significant advancements in its
product development programs and other critical business areas:

rhThrombin:
- -----------

    o    In July, ZymoGenetics completed a Phase 3 pivotal trial of recombinant
         human thrombin. The company reported positive results of this trial in
         September at a medical meeting and filed a BLA in December requesting
         FDA marketing approval.

    o    The company is currently enrolling patients in a Phase 2 trial of
         rhThrombin delivered via spray applicator as an adjunct to hemostasis
         for patients requiring autologous skin grafting for burns and other
         traumatic skin injuries. ZymoGenetics began enrolling patients in
         August and plans to complete enrollment in this open-label study in Q1
         2007.

Atacicept:
- ----------

    o    The company presented results from several Phase 1b clinical trials
         that demonstrated the safety and potential efficacy of atacicept as a
         therapy for rheumatoid arthritis, systemic lupus erythematosus and
         B-cell malignancies. The company is continuing enrollment in a Phase 1b
         trial involving patients with B-Chronic Lymphocytic Leukemia (B-CLL).

    o    In December 2006, ZymoGenetics and its partner Merck Serono initiated a
         Phase 2 trial of atacicept with rheumatoid arthritis patients whose
         disease has failed to respond to TNF inhibitors. Approximately 320
         patients are expected to participate in this trial.

IL-21:
- ------

    o    ZymoGenetics and its partner Novo Nordisk completed and presented data
         from their Phase 1 monotherapy trials of IL-21 in patients with
         metastatic melanoma or metastatic renal cell carcinoma. These data
         demonstrated a satisfactory toxicity profile and evidence of anti-tumor
         activity in several patients treated with this agent was observed.

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                                              ZymoGenetics 2006 Year-End Results
                                                                         2/15/07
                                                                     Page 3 of 6

    o    In July, the company initiated a Phase 1 trial combining IL-21 with
         Rituxan(R) (a product of Genentech, Inc. and Biogen IDEC) for treatment
         of patients with non-Hodgkin's lymphoma, and in October, the company
         started a Phase 1/2 trial combining IL-21 with Nexavar(R) (a product of
         Bayer Healthcare AG and Onyx Pharmaceuticals, Inc.) for treatment of
         patients with renal cell carcinoma.

    o    In collaboration with its partner Novo Nordisk, a Phase 2 clinical
         trial of IL-21 monotherapy for the treatment of patients with
         metastatic melanoma was started in July.

PEG-interferon lambda (PEG-IFN lambda; formerly known as Interleukin 29):
- -------------------------------------------------------------------------

    o    ZymoGenetics recently presented an abstract discussing the
         pharmacological activity of PEG-IFN lambda at a medical meeting in
         October 2006. The company submitted an Investigational New Drug
         Application to the FDA in November, and recently initiated a Phase 1a
         trial with healthy volunteers.

Other:
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    o    In March 2006, the company appointed Judith A. Hemberger, Ph.D. to its
         board of directors. Dr. Hemberger is an experienced biotech industry
         executive with over 25 years of global pharmaceutical and biotech
         industry experience. Dr. Hemberger filled a seat vacated by George B.
         Rathmann, who retired from the company's board in February 2006. Dr.
         Rathmann is continuing his relationship with the company as Chairman
         Emeritus, an honorary position.

    o    ZymoGenetics hired Michael J. Dwyer in May 2006 as its Senior Vice
         President of Sales & Marketing. Mr. Dwyer is responsible for continuing
         to build ZymoGenetics' sales, marketing and operations/logistics team
         in preparation for the anticipated launch of rhThrombin in late 2007.

    o    The company also appointed Vaughn B. Himes, Ph.D. as its Senior Vice
         President of Technical Operations, with responsibility for all aspects
         of the Company's manufacturing and process development activities. Dr.
         Himes replaced Mark D. Young, Ph.D., who retired from the company in
         April 2006.

OUTLOOK FOR 2007

The company's plan for 2007 includes the following important milestones:

o   Facilitate completion of FDA review of the rhThrombin BLA filing, gain
    approval and launch the product in the fourth quarter of the year;

o   Complete the Phase 2 study of rhThrombin spray and initiate a Phase 3 spray
    study in the second half of the year;

o   Enter into an ex-US development and commercialization relationship for
    rhThrombin.

o   Complete patient enrollment in the Phase 2 study of atacicept in rheumatoid
    arthritis before the end of the year;

o   Initiate Phase 2/3 studies suitable for registration of atacicept in
    systemic lupus erythematosus in the second half of the year;

o   Initiate clinical testing of atacicept in multiple sclerosis late in the
    year;

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                                              ZymoGenetics 2006 Year-End Results
                                                                         2/15/07
                                                                     Page 4 of 6

o   Complete and report results from the dose-escalation portion of the Phase 1b
    study of atacicept in B-CLL in the first half of the year;

o   Complete the Phase 1 clinical trial of IL-21 in combination with Rituxan and
    report results in the second half of the year;

o    Complete the Phase 1 portion of the renal cell carcinoma study of IL-21 in
     combination with Nexavar and initiate the Phase 2 part of the study;

o    Together with partner Novo Nordisk, complete enrollment in the Phase 2
     clinical trial of IL-21 as a monotherapy for the treatment of metastatic
     melanoma and initiate a higher-dose Phase 2 study in melanoma patients with
     high performance status; and

o    Complete Phase 1a clinical testing and initiate the Phase 1b study of
     PEG-IFN lambda as a treatment for Hepatitis C infection.

"2006 was a very successful year highlighted by the completion of the rhThrombin
Phase 3 pivotal study and filing of a license application with the FDA,"
commented Douglas E. Williams, Ph.D., Executive Vice President and Chief
Scientific Officer of ZymoGenetics. "With this milestone accomplished, we have
an even more energetic agenda for 2007. We will continue to support the
development of an rhThrombin franchise with pivotal testing of a spray kit. We
will broaden and intensify our atacicept and IL-21 programs in Phase 2, and we
have already begun clinical testing of PEG-IFN lambda. We will also focus our
attention on a number of promising preclinical stage programs to feed the
clinical pipeline in the future."

2007 FINANCIAL EXPECTATIONS

The company expects to post an increased net loss in 2007, which will be driven
largely by costs related to the planned launch of rhThrombin. More specifically,
the following items are expected to be the most significant factors contributing
to 2007 expense increases:

o   Manufacture of rhThrombin bulk drug and finished product inventories for
    launch and commercial sale, the cost of which will be expensed prior to FDA
    approval;

o   Recruitment and hiring of sales representatives and related management to
    support rhThrombin commercialization;

o   Other launch-related sales and marketing costs for rhThrombin; o
    Establishment of a medical affairs function to support the users of
    rhThrombin in the medical community;

o   Increased clinical trial costs for atacicept, IL-21 and PEG-IFN lambda with
    the advancement into more advanced clinical testing; and

o   Increased clinical development staffing to support the advancing programs.

As a result, the company believes that its total research and development
expense in 2007 will increase to approximately $135-145 million. General and
administrative expense is expected to increase to approximately $45-50 million
in 2007. The projected expenses for 2007 include noncash stock option
compensation expense of approximately $22 million, of which approximately
two-thirds is classified as research and development and the remainder as
general and administrative expense. Total revenues, excluding sales of
rhThrombin, are expected to be in the same range as those reported in 2006, with
the potential to increase by up to 30% based on the achievement of development
milestones by third-party licensees. The company estimates that its 2007 net
loss will be within the range of approximately $150-170 million, or
approximately $2.20 to $2.50 per share, including noncash stock option-related
expense. Sales of rhThrombin are not reflected in these estimates; however, it
is unlikely that sales in 2007, assuming FDA approval in mid-to-late October,
would materially affect the net loss estimates.

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                                              ZymoGenetics 2006 Year-End Results
                                                                         2/15/07
                                                                     Page 5 of 6

Besides funding its net operating loss in 2007, the company expects to incur
capital expenditures of approximately $6-8 million. The company expects overall
net usage of cash in 2007 to be within the range of approximately $130-150
million. If the company is successful in completing an ex-U.S. partnership for
rhThrombin, cash usage could be substantially lower.

CONFERENCE CALL AND WEBCAST INFORMATION

ZymoGenetics Q4 2006 Financial Results Conference Call will be held on February
15, 2007 at 4:30 p.m. Eastern Time and may be accessed at www.zymogenetics.com
or by dialing 877-407-0782. The international dial in number is 201-689-8567.
Participants should dial in to the call approximately 10 minutes prior to the
scheduled start time to register. The webcast will be archived for 30 days.

For replay, use the following information:

    o    Replay number: 877-660-6853

    o    International replay number: 201-612-7415

Replay passcodes (required for playback): account #: 286 and
conference ID #: 230234

ABOUT ZYMOGENETICS

ZymoGenetics creates novel protein drugs with the potential to significantly
help patients fight their diseases. The company is developing a diverse pipeline
of potential proprietary product candidates that are moving into and through
clinical development. These candidates span a wide array of clinical
opportunities that include bleeding, autoimmune and viral diseases and cancer.
ZymoGenetics intends to commercialize these product candidates through internal
development, collaborations with partners, and out-licensing of patents from its
extensive patent portfolio. For further information, visit www.zymogenetics.com.

This press release contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995. These forward-looking
statements are based on the current intent and expectations of the management of
ZymoGenetics. These statements are not guarantees of future performance and
involve risks and uncertainties that are difficult to predict. ZymoGenetics'
actual results and the timing and outcome of events may differ materially from
those expressed in or implied by the forward-looking statements because of risks
associated with our unproven discovery strategy, preclinical and clinical
development, regulatory oversight, intellectual property claims and litigation
and other risks detailed in the company's public filings with the Securities and
Exchange Commission, including the company's Annual Report on Form 10-K for the
year ended December 31, 2005. Except as required by law, ZymoGenetics undertakes
no obligation to update any forward-looking or other statements in this press
release, whether as a result of new information, future events or otherwise.

                            -Financial Tables Follow-

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                                              ZymoGenetics 2006 Year-End Results
                                                                         2/15/07
                                                                     Page 6 of 6

                               ZYMOGENETICS, INC.
                            STATEMENTS OF OPERATIONS
                    (in thousands, except per share amounts)



                                                 Three Months Ended              Year Ended
                                                    December 31,                December 31,
                                              -------------------------   -------------------------
                                                 2006          2005          2006          2005
                                              -----------   -----------   -----------   -----------
                                                     (unaudited)          (unaudited)
                                                                            
Revenues:
   Royalties                                  $     1,558   $     1,628   $     6,851   $     7,510
   Option fees                                      1,673         2,659         9,693        10,637
   License fees and milestone payments              1,139        11,154         8,836        24,762
                                              -----------   -----------   -----------   -----------
              Total revenues                        4,370        15,441        25,380        42,909
Operating expenses:
   Research and development                        33,829        26,217       128,450        99,615
   General and administrative                       9,093         5,831        33,224        23,321
                                              -----------   -----------   -----------   -----------
              Total operating expenses             42,922        32,048       161,674       122,936
                                              -----------   -----------   -----------   -----------
Loss from operations                              (38,552)      (16,607)     (136,294)      (80,027)
Other income, net                                   1,403         1,521         6,292         2,000
                                              -----------   -----------   -----------   -----------
Net loss                                      $   (37,149)  $   (15,086)  $  (130,002)  $   (78,027)
                                              ===========   ===========   ===========   ===========
Basic and diluted net loss per share          $     (0.55)  $     (0.23)  $     (1.94)  $     (1.28)
                                              ===========   ===========   ===========   ===========
Weighted-average number of shares used in
 computing net loss per share                      67,424        65,709        66,917        60,928
                                              ===========   ===========   ===========   ===========


                                 BALANCE SHEETS
                                 (in thousands)
                                                           December 31,
                                                      -----------------------
                                                         2006         2005
                                                      -----------   ---------
                                                      (unaudited)
Cash, cash equivalents and short-term investments     $   258,408   $ 366,311
Other current assets                                        8,982       8,884
Property and equipment, net                                71,542      71,803
Other assets                                                8,072       6,355
                                                      -----------   ---------
Total assets                                          $   347,004   $ 453,353
                                                      ===========   =========

Current liabilities                                   $    27,958   $  31,736
Lease obligations                                          67,087      66,754
Other non-current liabilities                              16,275      21,200
Shareholders' equity                                      235,684     333,663
                                                      -----------   ---------
Total liabilities and shareholders' equity            $   347,004   $ 453,353
                                                      ===========   =========

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