FRAMINGHAM, Mass.--(BUSINESS WIRE)--GTC Biotherapeutics, Inc. (“GTC”) (Nasdaq: GTCB) will webcast its 2007 Annual Meeting of Stockholders on May 23, 2007 starting at approximately 1:00 p.m. Eastern Time. The annual meeting is to be held at the Forefront Center for Meetings & Conferences in Waltham, Massachusetts. GTC expects to conduct the formal business portion of the meeting followed by a presentation to its stockholders.