FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public
Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Baker Bros. Capital (GP), LLC 		2. Issuer Name and Ticker or Trading Symbol

Ardea Biosciences, Inc./DE [ RDEA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      __ X __ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

667 MADISON AVENUE 17TH FLOOR 		3. Date of Earliest Transaction (MM/DD/YYYY)

12/19/2007
(Street)

NEW YORK, NY US 10021
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   (1) (2) 12/19/2007     P    2059   (5) A $13.25   135746   (3) (4) I   Through Partnership   (4)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Explanation of Responses:
( 1)  In addition to Baker Bros. Capital (GP), LLC, this Form 4 is being filed jointly by Felix J. Baker and Julian C. Baker, each of whom has the same business address as Baker Bros. Capital (GP), LLC and may be deemed to have a pecuniary interest in securities owned by it. Felix J. Baker and Julian C. Baker are directors of the Issuer. Because of certain business and family relationships with other security holders of the Issuer, the Reporting Persons are filing solely for informational purposes as if they were members of a group with such shareholders. (Continued in footnote 2)
( 2)  However, the Reporting Persons disclaim that they and any other person or persons in fact constitute a "group" for purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, or Rule 13d 5 thereunder or that they are the beneficial owner of securities owned by such other persons, and each of them declares beneficial ownership of securities reported herein except to the extent of their pecuniary interest, if any, therein.
( 3)  Includes dividends paid in shares of common stock on August 10, 2007 and November 16, 2007 to all holders of Series A preferred stock, as a result of which Baker Bros. Investments, L.P., received 170 and 117 shares of common stock, respectively and which Baker Bros. Investments II received 204 and 141 shares of common stock, respectively.
( 4)  Represents shares 73,301 shares owned directly by Baker Bros. Investments II, L.P. and 62,445 shares owned directly by Baker Bros. Investments, L.P., limited partnerships of which the sole general partner is Baker Bros. Capital, L.P., a limited partnership of which the sole general partner is Baker Bros. Capital (GP), LLC. Felix J. Baker and Julian C. Baker are controlling members of Baker Bros. Capital (GP), LLC.
( 5)  Represents shares purchased by Baker Bros. Investments II, L.P.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Baker Bros. Capital (GP), LLC
667 MADISON AVENUE 17TH FLOOR
NEW YORK, NY US 10021
X

BAKER JULIAN
667 MADISON AVENUE, 17TH FLOOR
NEW YORK, NY US 10021
X

BAKER FELIX
667 MADISON AVENUE, 17TH FLOOR
NEW YORK, NY US 10021
X


Signatures
/s/ Julian C. Baker, as Managing Member of Baker Bros. Capital (GP), LLC 12/21/2007
** Signature of Reporting Person Date

/s/ Julian C. Baker 12/21/2007
** Signature of Reporting Person Date

/s/ Felix J. Baker 12/21/2007
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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