New protein PP.sub.13 extracted from human placental tissues and use thereof

摘要

Protein PP.sub.13 is isolated from human placental tissues using a variety of methods, e.g., immunoadsorption. The protein has utility in production of an antiserum which has diagnostic applications. The placental specific proteins (e.g., PP.sub.13) are frequently detected in increasing amounts in women as pregnancy advances, and in patients with tumors especially of the tryphoblastic and embryonal types.