Sidney Udenfriend (April 5, 1918 – December 29, 1999) was an American biochemist, pharmacologist, founding director of the Roche Institute of Molecular Biology, co-discoverer of a color test to detect an intestinal tumor often linked with diseased heart valves.[1][2][3][4]Udenfriend was also a member of the National Academy of Sciences,[2]a recipient of the Ames Award,[4] Hillebrand Award,[4] the Arthur S. Flemming award,[4]Gairdner Award,[4] the Van Slyke Award[4]chief of the laboratory in the National Heart Institute,[4]He was also a member the American Chemical Society, the American Society of Biological Chemists, American Society for Pharmacology and Experimental Therapeutics, and American Association for the Advancement of Science.[4]