Peter Heinrich Krammer (born in 1946) is a German immunologist and one of the directors of The National Center for Tumor Diseases (NCT),[1] as well as the head of the Division Immunogenetics[2] at the German Cancer Research Center (DKFZ) in Heidelberg. Peter H. Krammer is well known for his research and findings in apoptosis. He and his lab members discovered the CD95 receptor (also known as Fas and APO-1)[3] and many other molecules involved in signaling through the CD95 receptor.