Filing Details

 UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2(b)

(Amendment No. 1)¹

 

Viridian Therapeutics, Inc.

(Name of Issuer)

Common Stock, $0.01 par value

(Title of Class of Securities)

92790C104

(CUSIP Number)

December 31, 2021

(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)

☐

Rule 13d-1(d)

 

 

1              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 disclosures provided in a prior cover page.

The information required on 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).

 

1

NAME OF REPORTING PERSON

Biotechnology Value Fund, 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

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

1,314,016 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

1,314,016 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,314,016 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

6.0% (1)

12

TYPE OF REPORTING PERSON

PN

  

(1) Includes 322,903 Shares (as defined below) currently issuable upon the conversion of Series A Preferred (as defined below).

 

Excludes 238,392 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker (as defined below).

1

NAME OF REPORTING PERSON

BVF I GP LLC

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

1,314,016 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

1,314,016 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,314,016 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

6.0%

12

TYPE OF REPORTING PERSON

OO

  

(1) Includes 322,903 Shares currently issuable upon the conversion of Series A Preferred.

 

Excludes 238,392 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

Biotechnology Value Fund II, 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

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

760,005 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

760,005 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

760,005 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

3.5% (1)

12

TYPE OF REPORTING PERSON

PN

  

(1) Excludes 413,221 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

BVF II GP LLC

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

760,005 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

760,005 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

760,005 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

3.5% (1)

12

TYPE OF REPORTING PERSON

OO

  

(1) Excludes 413,221 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

Biotechnology Value Trading Fund OS LP

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Cayman Islands

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

127,481 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

127,481 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

127,481 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

Less than 1% (1)

12

TYPE OF REPORTING PERSON

PN

  

(1) Excludes 67,870 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

BVF Partners OS Ltd.

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Cayman Islands

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

127,481 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

127,481 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

127,481 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

Less than 1% (1)

12

TYPE OF REPORTING PERSON

CO

  

(1) Excludes 67,870 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

BVF GP Holdings LLC

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

2,074,021 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

2,074,021 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,074,021 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

9.4% (1)

12

TYPE OF REPORTING PERSON

OO

  

(1) Includes 322,903 Shares currently issuable upon the conversion of Series A Preferred.

 

Excludes 651,613 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

BVF Partners 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

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

2,202,315 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

2,202,315 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,202,315 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

9.99% (1)

12

TYPE OF REPORTING PERSON

PN, IA

  

(1) Includes 322,903 Shares currently issuable upon the conversion of Series A Preferred.

 

Excludes 740,217 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

BVF Inc.

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☒

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

2,202,315 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

2,202,315 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,202,315 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

9.99% (1)

12

TYPE OF REPORTING PERSON

CO

  

(1) Includes 322,903 Shares currently issuable upon the conversion of Series A Preferred.

 

Excludes 740,217 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

 

1

NAME OF REPORTING PERSON

Mark N. Lampert

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

NUMBER OF

5

SOLE VOTING POWER

SHARES

BENEFICIALLY

0 shares

OWNED BY

6

SHARED VOTING POWER

EACH

REPORTING

2,202,315 (1)

PERSON WITH

7

SOLE DISPOSITIVE POWER

0 shares

8

SHARED DISPOSITIVE POWER

2,202,315 (1)

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,202,315 (1)

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

9.99% (1)

12

TYPE OF REPORTING PERSON

IN

  

(1) Includes 322,903 Shares currently issuable upon the conversion of Series A Preferred.

 

Excludes 740,217 Shares underlying certain Series A Preferred that may not be exercised due to the Series A Blocker.

Item 1(a).

Name of Issuer:

 

Viridian Therapeutics, Inc., a Delaware corporation (the “Issuer”).

 

Item 1(b).

Address of Issuer’s Principal Executive Offices:

 

221 Crescent Street, Suite 401

Waltham, MA 02453

 

Item 2(a).

Name of Person Filing

Item 2(b).

Address of Principal Business Office or, if None, Residence

Item 2(c).

Citizenship

 

Biotechnology Value Fund, L.P. (“BVF”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF I GP LLC (“BVF GP”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Biotechnology Value Fund II, L.P. (“BVF2”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF II GP LLC (“BVF2 GP”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Biotechnology Value Trading Fund OS LP (“Trading Fund OS”)

PO Box 309 Ugland House

Grand Cayman, KY1-1104

Cayman Islands

Citizenship: Cayman Islands

 

BVF Partners OS Ltd. (“Partners OS”)

PO Box 309 Ugland House

Grand Cayman, KY1-1104

Cayman Islands

Citizenship: Cayman Islands

 

BVF GP Holdings LLC (“BVF GPH”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF Partners L.P. (“Partners”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF Inc.

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Mark N. Lampert (“Mr. Lampert”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: United States

 

Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.”

 

Item 2(d).

Title of Class of Securities:

 

Common Stock, $0.01 par value (the “Shares”).

 

Item 2(e).

CUSIP Number:

 

92790C104

 

Item 3.

If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:

 

		/x/	Not applicable.
	(a)	/ /	Broker or dealer registered under Section 15 of the Exchange Act.
	(b)	/ /	Bank as defined in Section 3(a)(6) of the Exchange Act.
	(c)	/ /	Insurance company as defined in Section 3(a)(19) of the Exchange Act.
	(d)	/ /	Investment company registered under Section 8 of the Investment Company Act.
	(e)	/ /	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).
	(f)	/ /	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F).
	(g)	/ /	A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G).
	(h)	/ /	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act.
	(i)	/ /	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act.
	(j)	/ /	Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
	(k)	/ /	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J), please specify the type of institution: ____

 

Item 4.

Ownership

 

(a)

Amount beneficially owned:

 

As of the close of business on December 31, 2021, the Reporting Persons held 15,946 shares of Series A Preferred Stock (the “Series A Preferred”) convertible for an aggregate of approximately 1,063,120 Shares. Each share of the Series A Preferred is convertible into 66 and 2/3 Shares. The Series A Preferred may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Securities Exchange Act of 1934, more than 9.99% of the number of Shares then issued and outstanding (the “Series A Blocker”). As of the close of business on December 31, 2021, the Series A Blocker limits the aggregate conversion of the Series A Preferred by the Reporting Persons to 322,903 out of the 1,063,120 Shares underlying the Series A Preferred owned by the Reporting Persons in the aggregate. In providing beneficial ownership described herein, the Reporting Persons have assumed that certain shares of Series A Preferred convertible into 322,903 Shares owned by BVF have been converted and the remaining shares of Series A Preferred owned by the Reporting Persons in the aggregate would not be converted due to the Series A Blocker.

 

As of the close of business on December 31, 2021, (i) BVF beneficially owned 1,314,016 Shares, including 322,903 shares of Common Stock underlying certain shares of Series A Preferred, and excluding 238,392 shares of Common Stock underlying certain shares of Series A Preferred, (ii) BVF2 beneficially owned 760,005 Shares, excluding 413,221 shares of Common Stock underlying certain shares of Series A Preferred, and (iii) Trading Fund OS beneficially owned 127,481 Shares, excluding 67,870 shares of Common Stock underlying certain shares of Series A Preferred.

 

BVF GP, as the general partner of BVF, may be deemed to beneficially own the 1,314,016 Shares beneficially owned by BVF.

 

BVF2 GP, as the general partner of BVF2, may be deemed to beneficially own the 760,005 Shares beneficially owned by BVF2.

 

Partners OS, as the general partner of Trading Fund OS, may be deemed to beneficially own the 127,481 Shares beneficially owned by Trading Fund OS.

 

BVF GPH, as the sole member of each of BVF GP and BVF2 GP, may be deemed to beneficially own the 2,074,021 Shares beneficially owned in the aggregate by BVF and BVF2.

 

Partners, as the investment manager of BVF, BVF2 and Trading Fund OS, and the sole member of Partners OS, may be deemed to beneficially own the 2,202,315 Shares beneficially owned in the aggregate by BVF, BVF2 and Trading Fund OS and held in a certain Partners managed account (the “Partners Managed Account”), including 813 Shares held in the Partners Managed Account, and excluding 20,734 Shares underlying certain shares of Series A Preferred held in the Partners Managed Account.

 

BVF Inc., as the general partner of Partners, may be deemed to beneficially own the 2,202,315 Shares beneficially owned by Partners.

 

Mr. Lampert, as a director and officer of BVF Inc., may be deemed to beneficially own the 2,202,315 Shares beneficially owned by BVF Inc.

 

The foregoing should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of any Shares owned by another Reporting Person. BVF GP disclaims beneficial ownership of the Shares beneficially owned by BVF. BVF2 GP disclaims beneficial ownership of the Shares beneficially owned by BVF2. Partners OS disclaims beneficial ownership of the Shares beneficially owned by Trading Fund OS. BVF GPH disclaims beneficial ownership of the Shares beneficially owned by BVF and BVF2. Each of Partners, BVF Inc. and Mr. Lampert disclaims beneficial ownership of the Shares beneficially owned by BVF, BVF2 and Trading Fund OS and held in the Partners Managed Account, and the filing of this statement shall not be construed as an admission that any such person or entity is the beneficial owner of any such securities.

 

(b)

Percent of class:

 

The following percentages are based on a denominator that is the sum of: (a) 21,722,349 Shares outstanding as of November 3, 2021 as disclosed in Exhibit 99.1 to the Issuer’s Current Report on Form 8-K filed with the Securities and Exchange Commission on November 4, 2021 and (b) 322,903 Shares that may be acquired upon the conversion of certain shares of Series A Preferred, as applicable.

 

As of the close of business on December 31, 2021, (i) each of BVF and BVF GP may be deemed to beneficially own approximately 6.0% of the outstanding Shares, (ii) each of BVF2 and BVF2 GP may be deemed to beneficially own approximately 3.5% of the outstanding Shares, (iii) each of Trading Fund OS and Partners OS may be deemed to beneficially own less than 1.0% of the outstanding Shares, (iv) BVF GPH may be deemed to beneficially own approximately 9.4% of the outstanding Shares and (v) each of Partners, BVF Inc. and Mr. Lampert may be deemed to beneficially own approximately 9.99% of the outstanding Shares (less than 1.0% of the outstanding Shares are held in the Partners Managed Account).

 

(c)

Number of shares as to which such person has:

 

(i)

Sole power to vote or to direct the vote

 

See Cover Pages Items 5-9.

 

(ii)

Shared power to vote or to direct the vote

 

See Cover Pages Items 5-9.

 

(iii)

Sole power to dispose or to direct the disposition of

 

See Cover Pages Items 5-9.

 

(iv)

Shared power to dispose or to direct the disposition of

 

See Cover Pages Items 5-9.

 

Item 5.

Ownership of Five Percent or Less of a Class.

 

Not Applicable.

 

Item 6.

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

 

BVF GP, BVF GPH, Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by BVF. BVF GPH, Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by BVF2. Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by Trading Fund OS and held in the Partners Managed Account.

 

Item 7.

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

 

Not Applicable.

 

Item 8.

Identification and Classification of Members of the Group.

 

See Exhibit 99.1 to the Schedule 13G filed with the Securities and Exchange Commission on November 9, 2020.

 

Item 9.

Notice of Dissolution of Group.

 

Not Applicable.

 

Item 10.

Certifications.

 

By signing below each of the undersigned certifies that, to the best of its 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.

 

SIGNATURE

 

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

 

Dated: February 14, 2022

 

BIOTECHNOLOGY VALUE FUND, L.P.			BIOTECHNOLOGY VALUE TRADING FUND OS LP
By:	BVF I GP LLC., its general partner		By:	BVF Partners L.P., its investment manager
			By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert		By:	/s/ Mark N. Lampert
	Chief Executive Officer			Mark N. Lampert
				President
BVF I GP LLC
			BVF GP HOLDINGS LLC
By:	/s/ Mark N. Lampert
	Mark N. Lampert		By:	/s/ Mark N. Lampert
	Chief Executive Officer			Mark N. Lampert
				Chief Executive Officer
BIOTECHNOLOGY VALUE FUND II, L.P.
			BVF PARTNERS L.P.
By:	BVF II GP LLC, its general partner
			By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert		By:	/s/ Mark N. Lampert
	Chief Executive Officer			Mark N. Lampert
				President
BVF II GP LLC
			BVF INC.
By:	/s/ Mark N. Lampert
	Mark N. Lampert		By:	/s/ Mark N. Lampert
	Chief Executive Officer			Mark N. Lampert
				President
BVF PARTNERS OS LTD.
			/s/ Mark N. Lampert
By:	BVF Partners L.P., its sole member		MARK N. LAMPERT
By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert
	President