CARLSBAD, Calif. & FOSTER CITY, Calif.--(BUSINESS WIRE)--Invitrogen Corporation (NASDAQ: IVGN) and Applied Biosystems Inc. (NYSE: ABI) today announced the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, in connection with the companies’ pending merger. The expiration of the waiting period satisfies one of the conditions to the closing of the transaction. Invitrogen will soon be engaging with the European Commission for a similar review process.