(Name
of Issuer)
Common
Stock, par value $0.001 per share
|
||
(Title
of Class of Securities)
37245M603
|
||
(CUSIP
Number)
December
31, 2009
|
||
(Date
of Event which Requires Filing of this Statement)
|
1
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
Felix
J. Baker
|
|||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
(a) ¨
(b) ¨
|
||
3
|
SEC
USE ONLY
|
|||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
United
States
|
|||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
REPORTING
PERSON
WITH
|
5
|
SOLE
VOTING POWER
-0-
|
||
6
|
SHARED
VOTING POWER
19,780,851
|
|||
7
|
SOLE
DISPOSITIVE POWER
-0-
|
|||
8
|
SHARED
DISPOSITIVE POWER
19,780,851
|
|||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
19,780,851
|
|||
10
|
CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN
SHARES
¨
(See
Instructions)
|
|||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW 9
9.9%
|
|||
12
|
TYPE
OF REPORTING PERSON (See Instructions)
IN
|
1
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
Julian
C. Baker
|
|||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
(a) ¨
(b) ¨
|
||
3
|
SEC
USE ONLY
|
|||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
United
States
|
|||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
REPORTING
PERSON
WITH
|
5
|
SOLE
VOTING POWER
-0-
|
||
6
|
SHARED
VOTING POWER
19,780,851
|
|||
7
|
SOLE
DISPOSITIVE POWER
-0-
|
|||
8
|
SHARED
DISPOSITIVE POWER
19,780,851
|
|||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
19,780,851
|
|||
10
|
CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN
SHARES
¨
(See
Instructions)
|
|||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW 9
9.9%
|
|||
12
|
TYPE
OF REPORTING PERSON (See Instructions)
IN
|
Item
1(a)
|
Name
of Issuer:
|
Item
1(b)
|
Address
of Issuer’s Principal Executive
Offices:
|
Item
2(a)
|
Name
of Person Filing:
|
Item
2(b)
|
Address
of Principal Business Office or, if None,
Residence:
|
Name
|
Business Address
|
|
Felix
J. Baker
|
667
Madison Avenue
New
York, NY 10065
|
|
Julian
C. Baker
|
|
667
Madison Avenue
New
York,
NY 10065
|
Item
2(c)
|
Citizenship:
|
Item
2(d)
|
Title
of Class of Securities:
|
Item
2(e)
|
CUSIP
Number:
|
Item
3.
|
If
this statement is filed pursuant to §§240.13d-1(b) or (c), check whether
the person filing is
a: N/A
|
Item
4.
|
Ownership.
|
Number
of
|
Percent
of Class
|
|||
Name
|
Shares
|
Outstanding
|
||
667,
L.P.
|
4,474,440
|
2.2%
|
||
Baker
Brothers Life Sciences, L.P.
|
18,887,609
|
8.7%
|
||
14159,
L.P.
|
608,164
|
0.3%
|
Item
5.
|
Ownership
of Five Percent or Less of a Class.
|
Item
6.
|
Ownership
of More than Five Percent on Behalf of Another
Person.
|
Item
7.
|
Identification
and Classification of the Subsidiary Which Acquired the Security Being
Reported on by the Parent Holding Company or Control
Person.
|
Item
8.
|
Identification
and Classification of Members of the
Group.
|
Item
9.
|
Notice
of Dissolution of Group.
|
Item
10.
|
Certification.
|
/s/
Felix J. Baker
|
Felix
J. Baker
|
/s/
Julian C. Baker
|
Julian
C. Baker
|
/s/
Felix J. Baker
|
Felix
J. Baker
|
/s/
Julian C. Baker
|
Julian
C. Baker
|