CUSIP
No. 249908104
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13G
|
Page
2 of 8 Pages
|
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1
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
TANG
CAPITAL PARTNERS, LP
|
||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a)
¨
(b) ý |
|||
3
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SEC
USE ONLY
|
||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
DELAWARE
|
||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH |
5
|
SOLE
VOTING POWER
0
|
|||
6
|
SHARED
VOTING POWER
3,409,100
|
||||
7
|
SOLE
DISPOSITIVE POWER
0
|
||||
8
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SHARED
DISPOSITIVE POWER
3,409,100
|
||||
9
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AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,409,100
|
||||
10
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES
¨
|
||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.2%
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||||
12
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TYPE
OF REPORTING PERSON
PN
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CUSIP
No. 249908104
|
13G
|
Page
3 of 8 Pages
|
|||
1
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
TANG
CAPITAL MANAGEMENT, LLC
|
||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
|
(a)
¨
(b)
ý
|
|||
3
|
SEC
USE ONLY
|
||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
DELAWARE
|
||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH |
5
|
SOLE
VOTING POWER
0
|
|||
6
|
SHARED
VOTING POWER
3,409,100
|
||||
7
|
SOLE
DISPOSITIVE POWER
0
|
||||
8
|
SHARED
DISPOSITIVE POWER
3,409,100
|
||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,409,100
|
||||
10
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES
¨
|
||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.2%
|
||||
12
|
TYPE
OF REPORTING PERSON
OO
|
CUSIP
No. 249908104
|
13G
|
Page
4 of 8 Pages
|
|||
1
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
KEVIN
C. TANG
|
||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a)
¨
(b)
ý
|
|||
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
157,100
|
|||
6
|
SHARED
VOTING POWER
3,499,100
|
||||
7
|
SOLE
DISPOSITIVE POWER
157,100
|
||||
8
|
SHARED
DISPOSITIVE POWER
3,632,100
|
||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,789,200
|
||||
10
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES
¨
|
||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.0%
|
||||
12
|
TYPE
OF REPORTING PERSON
IN
|
|
This
Statement on Schedule 13G (this “Statement”) is filed by Tang Capital
Partners, LP (“Tang Capital Partners”); Tang Capital Management, LLC, the
general partner of Tang Capital Partners (“Tang Capital Management”); and
Kevin C. Tang, the manager of Tang Capital
Management.
|
|
Tang
Capital Partners is a Delaware limited partnership. Tang Capital
Management is a Delaware limited liability company. Mr. Tang is a
United
States citizen.
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·
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3,409,100
shares owned of record by Tang Capital Partners, for which Tang Capital
Management, of which Mr. Tang is manager, serves as general
partner. Mr. Tang shares voting and dispositive power over such
shares with Tang Capital Management and Tang Capital
Partners.
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·
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11,000
shares owned of record by Mr. Tang.
|
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·
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369,100
shares over which Mr. Tang has voting and/or dispositive
power.
|
Tang Capital Partners | 7.2% | ||
Tang Capital Management | 7.2% | ||
Kevin C. Tang | 8.0% |
(i) | sole power to vote or to direct the vote: | ||
Tang Capital Partners | 0 shares | ||
Tang Capital Management | 0 shares | ||
Kevin C. Tang | 157,100 shares |
(ii) | shared power to vote or to direct the vote: | ||
Tang Capital Partners | 3,409,100 shares | ||
Tang Capital Management | 3,409,100 shares | ||
Kevin C. Tang | 3,499,100 shares |
(iii) | sole power to dispose or to direct the disposition of: | ||
Tang Capital Partners | 0 shares | ||
Tang Capital Management | 0 shares | ||
Kevin C. Tang | 157,100 shares |
(iv) | shared power to dispose or to direct the disposition of: | ||
Tang Capital Partners | 3,409,100 shares | ||
Tang Capital Management | 3,409,100 shares | ||
Kevin C. Tang | 3,632,100 shares |
Item
7.
|
Identification
and Classification of the Subsidiary Which Acquired the Security
Being
Reported on by the Parent Holding
Company.
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Date: | November 12, 2007 | ||
TANG CAPITAL PARTNERS, LP | |||
By: | Tang Capital Management, LLC, its General Partner | ||
By: | /s/ Kevin C. Tang | ||
Kevin C. Tang, Manager | |||
TANG CAPITAL MANAGEMENT, LLC | |||
By: | /s/ Kevin C. Tang | ||
Kevin C. Tang, Manager | |||
/s/ Kevin C. Tang | |||
Kevin C. Tang |