diaDexus, Inc. (pre-merger)

Rule 506

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Withdrawal of a registration statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Registration (IPO) statement under Securities Act of 1933

Galligan Andrew H

Drexler Karen

06

FILED AS OF DATE: 20061213

06