Paul Malone Allen (born September 1951) is an American cellular immunologist and current Robert L. Kroc Professor of Pathology and Immunology at Washington University School of Medicine in St. Louis.
Allen holds prestigious MERIT status with the National Institutes of Health.
[1][2][3] He completed a pathology research fellowship at Harvard Medical School with Emil Unanue and joined the Washington University faculty in 1985.
Allen's work specializes in the study of how T lymphocytes recognize antigens and initiate an immune response.
He and Emil R. Unanue were responsible for the discovery that antigen-presenting cells present antigens to bind to a special group of molecules known as the major histocompatibility complex.