ROCKVILLE, Md.--(BUSINESS WIRE)--Emergent BioSolutions Inc. (NYSE:EBS) announced today that it has initiated a lawsuit against Protein Sciences Corporation (PSC) and its senior management in connection with a pending acquisition of PSC’s assets. The complaint—filed in the Supreme Court of the State of New York—alleges, among other things, that PSC and its senior management engaged in fraudulent conduct during the proposed transaction and that PSC breached the terms of its agreements with Emergent. Emergent is presently evaluating whether additional legal filings or courses of action are appropriate.