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 *

Southpaw Credit Opportunity Master Fund, L.P. 		2. Issuer Name and Ticker or Trading Symbol

AVIGEN INC DE [ AVGN ] 		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)

FOUR GREENWICH OFFICE PARK 		3. Date of Earliest Transaction (MM/DD/YYYY)

10/9/2009
(Street)

GREENWICH, CT 06831
(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   10/9/2009     P    882221   A $1.53   4319052   (1) I   See Footnote   (1) (2)
Common Stock   10/13/2009     P    9150   A $1.5065   4328202   (1) I   See Footnote   (1) (2)
Common Stock   10/14/2009     P    8455   A $1.5080   4336657   (1) I   See Footnote   (1) (2)
Common Stock   10/14/2009     P    6433   A $1.5157   4343090   (1) I   See Footnote   (1) (2)

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)  The filing of this Form 4 shall not be construed as an admission that (i) Southpaw Credit Opportunity Master Fund LP ("Fund"), (ii) Southpaw Asset Management LP ("Southpaw Management") (iii) Southpaw Holdings LLC ("Southpaw Holdings") (iv) Kevin Wyman or (v) Howard Golden is or was for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended, the beneficial owner of any of shares of common stock of Avigen, Inc. (the "Issuer") par value $0.001 per share ("Common Stock") held by Fund. Pursuant to Rule 16a-1, Fund, Southpaw Management, Southpaw Holdings, Mr. Wyman and Mr. Golden disclaim such beneficial ownership beyond their pecuniary interest.
( 2)  Southpaw Management holds shares of Common Stock indirectly through the account of Fund, of which Southpaw Management serves as the investment manager. Southpaw Management or its affiliates receive a performance-based and an asset-based fee for managing the investments of Fund. Southpaw Holdings reports the shares of Common Stock held indirectly by Southpaw Management, because, as the general partner of Southpaw Management, it controlled the disposition and voting of the securities. Messrs. Wyman and Golden report the shares of Common Stock held indirectly by Southpaw Management because, as the managing members of Southpaw Holdings, they controlled the disposition and voting of the securities.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Southpaw Credit Opportunity Master Fund, L.P.
FOUR GREENWICH OFFICE PARK
GREENWICH, CT 06831
X

Southpaw Asset Management LP
FOUR GREENWICH OFFICE PARK
GREENWICH, CT 06831
X

Southpaw Holdings LLC
FOUR GREENWICH OFFICE PARK
GREENWICH, CT 06831
X

Wyman Kevin
FOUR GREENWICH OFFICE PARK
GREENWICH, CT 06831
X

Golden Howard
FOUR GREENWICH OFFICE PARK
GREENWICH, CT 06831
X


Signatures
/s/ Howard Golden, managing member Southpaw GP, LLC, general partner, Southpaw Credit Opportunity Master Fund LP 10/14/2009
** Signature of Reporting Person Date

/s/ Howard Golden, managing member, Southpaw Holdings LLC, general partner, Southpaw Asset Management LP 10/14/2009
** Signature of Reporting Person Date

/s/ Howard Golden, managing member, Southpaw Holdings LLC 10/14/2009
** Signature of Reporting Person Date

/s/ Kevin Wyman 10/14/2009
** Signature of Reporting Person Date

/s/ Howard Golden 10/14/2009
** 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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