Cohn, Edwin J (Joseph) (1892–1953)

US biochemist. A pioneer in protein chemistry, he performed research on pernicious anaemia 1926–32, which led to the eventual isolation of vitamin B12 by other scientists; he researched medical uses of such blood components as plasma, gamma globulin, and albumin.

He was born in New York City. He spent his career at Harvard Medical School (1920–53). During World War II, he planned and directed blood fractionation programs for the armed forces.