High Quality Content by WIKIPEDIA articles! Panayotis G. Katsoyannis is a noted biochemist who is often credited with being the first to synthesize insulin while leading a team at the University of Pittsburgh in the early 1960s. His results synthesizing insulin were achieved almost simultaneously with that of Helmut Zahn at RWTH Aachen University in Germany. Katsoyannis was also noted for his studies on the synthesis of oxytocin and vasopressin. Following his time at the University of Pittsburgh, Katsoyannis served as the Head of the Division of Biochemistry at the Brookhaven National Laboratory and later was appointed as the founding Chairman of the Department of Biochemistry at Mount Sinai School of Medicine in 1967 where he remains. Katsoyannis continues at Mount Sinai as a Distinguished Service Professor and Chair Emeritus in Pharmacologic and Systems Therapeutics.