DENIS R. ALEXANDER has spent the past forty years in the biological research community, most recently as the head of the Laboratory of Signalling and Development at the Babraham Institute in the U.K., where he also served as chair of the Molecular Immunology Programme. Dr. Alexander's interest in human genetics was sharpened during a period (1981-1986) spent as associate professor at the American University of Beirut on the Faculty of Medicine. While there he helped to establish the National Unit of Human Genetics, which performed specialized diagnostic work and carried out research on the genetic diseases found in Lebanon. In 2006 Dr. Alexander established the Faraday Institute at St. Edmund's College, Cambridge, where he is a fellow. Since that time he has served as director of the Institute.