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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                 SCHEDULE 13G

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
              RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO
                           FILED PURSUANT TO 13d-2 (b)
                                (Amendment No. ___)*

                              GENOMIC HEALTH, INC.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  COMMON STOCK
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    37244C101
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                DECEMBER 31, 2005
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|   Rule 13d-1(b)

      |_|   Rule 13d-1(c)

      |X|   Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                               Page 1 of 1 pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      VERSANT VENTURE CAPITAL I, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      CALIFORNIA
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        2,192,150
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               2,192,150
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,192,150
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.0%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      VERSANT SIDE FUND I, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      CALIFORNIA
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        42,994
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               42,994
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      42,994
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.2%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      VERSANT AFFILIATES FUND I-A, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      CALIFORNIA
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        42,412
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               42,412
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      42,412
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.2%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      VERSANT AFFILIATES FUND I-B, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      CALIFORNIA
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        89,066
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               89,066
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      89,066
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.4%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      VERSANT VENTURES I, LLC
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      CALIFORNIA
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        2,366,622
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               2,366,622
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      OO
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      BRIAN G. ATWOOD
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      ROSS A. JAFFE
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      SAMUEL D. COLELLA
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      DONALD B. MILDER
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      BARBARA N. LUBASH
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      REBECCA B. ROBERTSON
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages


CUSIP No. 37244C101                                         Page 2 of   Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      WILLIAM J. LINK
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            2,366,622
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        2,366,622
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,366,622
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      9.7%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!

                               Page 2 of   pages




Item 1.

        (a)     Name of Issuer: GENOMIC HEALTH, INC.

        (b)     Address of Issuer's Principal Executive Offices

                301 Penobscot Drive, Redwood City, CA 94063
Item 2.

        (a)     Name of Person Filing

Versant Venture Capital I, L.P.         (VVC-I)
Versant Side Fund I, L.P.               (VSF-I)
Versant Affiliates Fund I-A, L.P.       (VAF-IA)
Versant Affiliates Fund I-B, L.P.       (VAF-IB)
Versant Ventures I, LLC                 (VV-LLC)
Brain G. Atwood                         (BGA)
Ross A. Jaffe                           (RAJ)
Samuel D. Colella                       (SDC)
Donald B. Milder                        (DBM)
Barbara N. Lubash                       (BNL)
Rebecca B. Robertson                    (RBR)
William J. Link                         (WJL)

VV-LLC is the General Partner of VVC-I, VSF-I, VAF-IA, & VAF-IB.

BGA, RAJ. SDC, DBM, BNL, RBR, and WJL are Managing Directors of VVC-LLC.

        (b)     Address of Principal Business Office or, if none, Residence

                Versant Ventures, 3000 Sand Hill Road, Building Four,
                Suite 210, Menlo Park, CA  94025

        (c)     Citizenship

VV-LLC, VVC-I, VSF-I, VAF-IA, & VAF-IB  = California
BGA, RAJ. SDC, DBM, BNL, RBR, and WJL = United States

        (d)     Title of Class of Securities: Common Stock

        (e)     CUSIP Number: 37244C101

Item 3.

        NOT APPLICABLE.

If this  statement is filed pursuant to  240.13d-1(b)  or  240.13d-2(b)  or (c),
check whether the person filing is a:

        (a)     [   ]   Broker or dealer registered under section 15 of
                        the Act (15 U.S.C. 78o).
        (b)     [   ]   Bank as defined in section 3(a)(6) of the
                        Act (15 U.S.C. 78c).

        (c)     [   ]   Insurance company as defined in section 3(a)(19) of the
                        Act (15 U.S.C. 78c).

        (d)     [   ]   Investment company registered under section 8 of the
                        Investment Company Act of 1940 (15 U.S.C 80a-8).

        (e)     [   ]   An investment adviser in accordance with
                        240.13d-1(b)(1)(ii)(E);

        (f)     [   ]   An employee benefit plan or endowment fund in accordance
                        with 240.13d-1(b)(1)(ii)(F);

        (g)     [   ]   A parent holding company or control person in accordance
                        with  240.13d-1(b)(1)(ii)(G);

        (h)     [   ]   A savings associations as defined in Section 3(b) of the
                        Federal Deposit Insurance Act (12 U.S.C. 1813);

        (i)     [   ]   A church plan that is excluded from the definition of an
                        investment company under section 3(c)(14) of the
                        Investment Company Act of 1940 (15 U.S.C. 80a-3);

        (j)     [   ]   Group, in accordance with 240.13d-1(b)(1)(ii)(J).



Item 4.

        Ownership.

SEE ROWS 5 THROUGH 11 OF COVER PAGES

Provide the following  information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.

  (a)     Amount beneficially owned: ________________________.
   (b)     Percent of class: ____________________________.
   (c)     Number of shares as to which the person has:
           (i)     Sole power to vote or to direct the vote ___________.
           (ii)    Shared power to vote or to direct the vote ________________.
           (iii)   Sole power to dispose or to direct the disposition of ______.
           (iv)    Shared power to dispose or to direct the disposition of ____.

Instruction.  For computations  regarding  securities which represent a right to
acquire an underlying security see 240.13d3(d)(1).

Item 5.

        Ownership of Five Percent or Less of a Class

If this  statement  is being filed to report the fact that as of the date hereof
the  reporting  person has ceased to be the  beneficial  owner of more than five
percent  of the class of  securities,  check  the  following  [ ].  Instruction:
Dissolution of a group requires a response to this item.

Item 6.

        Ownership of More than Five Percent on Behalf of Another Person.

If any other person is known to have the right to receive or the power to direct
the  receipt  of  dividends  from,  or the  proceeds  from  the  sale  of,  such
securities,  a statement  to that effect  should be included in response to this
item and, if such interest relates to more than five percent of the class,  such
person  should be  identified.  A listing of the  shareholders  of an investment
company registered under the Investment Company Act of 1940 or the beneficiaries
of employee benefit plan, pension fund or endowment fund is not required.

Under certain circumstances set forth in VVC-I, VSF-I, VAF-IA, & VAF-IBs Limited
Partnership Agreements, the General Partner and Limited Partners of each of such
funds have the right to receive  dividends  from,  or the proceeds from the sale
of, the Common Stock of Issuer owned by each such fund.

Item 7.

     Identification  and  Classification  of the  Subsidiary  Which Acquired the
Security Being Reported on By the Parent Holding Company or Control Person.

NOT APPLICABLE.

If a parent holding company or Control person has filed this schedule,  pursuant
to Rule  13d-1(b)(1)(ii)(G),  so indicate  under Item 3(g) and attach an exhibit
stating the identity and the Item 3 classification  of the relevant  subsidiary.
If a parent holding  company or control person has filed this schedule  pursuant
to Rule 13d-1(c) or Rule 13d-1(d),  attach an exhibit stating the identification
of the relevant subsidiary.

Item 8.

        Identification and Classification of Members of the Group

NOT APPLICABLE.

If a group  has filed  this  schedule  pursuant  to  240.13d-1(b)(1)(ii)(J),  so
indicate  under Item 3(j) and attach an exhibit  stating the identity and Item 3
classification  of each member of the group.  If a group has filed this schedule
pursuant to 240.13d-1(c) or 240.13d-1(d), attach an exhibit stating the identity
of each member of the group.

Item 9.
        Notice of Dissolution of Group

NOT APPLICABLE.

Notice of dissolution of a group may be furnished as an exhibit stating the date
of the  dissolution and that all further filings with respect to transactions in
the security reported on will be filed, if required, by members of the group, in
their individual capacity. See Item 5.

Item 10.

        Certification

(a)  The  following  certification  shall be included if the  statement is filed
     pursuant to  240.13d-1(b):  By signing below I certify that, to the best of
     my knowledge and belief, the securities referred to above were acquired and
     are held in the  ordinary  course of business and were not acquired and are
     not held for the purpose of or with the effect of  changing or  influencing
     the control of the issuer of the  securities  and were not acquired and are
     not held in connection with or as a participant in any  transaction  having
     that purpose or effect.

(b)  The  following  certification  shall be included if the  statement is filed
     pursuant to  240.13d-1(c):  By signing below I certify that, to the best of
     my knowledge and belief, the securities referred to above were not acquired
     and are not held for the  purpose  of or with the  effect  of  changing  or
     influencing  the  control  of the  issuer  of the  securities  and were not
     acquired and are not held in  connection  with or as a  participant  in any
     transaction having that purpose or effect.




EXHIBITS

A:      Joint Filing Statement

SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date:   February 14, 2006

VERSANT VENTURE CAPITAL I, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT SIDE FUND I, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT AFFILIATES FUND I-A, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT AFFILIATES FUND I-B, L.P.
By its General Partner, Versant Ventures I, LLC




_______________________________________________-
Samuel D. Colella, Managing Director







Exhibit A

JOINT FILING STATEMENT

     Pursuant  to Rule  13d-1(f)(1),  we, the  undersigned,  hereby  express our
agreement that the attached Schedule 13G is filed on behalf of each of us.

Date:   February 14, 2006


VERSANT VENTURE CAPITAL I, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT SIDE FUND I, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT AFFILIATES FUND I-A, L.P.
By its General Partner, Versant Ventures I, LLC

VERSANT AFFILIATES FUND I-B, L.P.
By its General Partner, Versant Ventures I, LLC



_______________________________________________-
Samuel D. Colella, Managing Director




Brain G. Atwood
Ross A. Jaffe
Samuel D. Colella
Donald B. Milder
Barbara N. Lubash
Rebecca B. Robertson
William J. Link


_________________________________
Robin L. Praeger, Authorized Signer



The  original  statement  shall be signed by each  person  on whose  behalf  the
statement is filed or his authorized representative.  If the statement is signed
on behalf of a person by his authorized  representative  other than an executive
officer  or   general   partner  of  the   filing   person,   evidence   of  the
representative's  authority to sign on behalf of such person shall be filed with
the  statement,  provided,  however,  that a power of attorney  for this purpose
which is already on file with the Commission may be  incorporated  by reference.
The name and any title of each person who signs the statement  shall be typed or
printed  beneath his  signature.  NOTE:  Schedules  filed in paper  format shall
include  a signed  original  and five  copies  of the  schedule,  including  all
exhibits.  See  240.13d-7  for other  parties  for whom  copies  are to be sent.
Attention:  Intentional  misstatements  or omissions of fact constitute  Federal
criminal violations (See 18 U.S.C. 1001)