Northrop, John Howard (1891-1987), an American biochemist, shared the 1946 Nobel Prize in chemistry with James B. Sumner and W. M. Stanley. Northrop prepared in crystalline form several pure enzymes and one of the viruses that destroy bacteria (see Enzyme ). Northrop’s writings on enzymes include Crystalline Enzymes (1939). He was born on July 5, 1891, in Yonkers, New York. He received his doctor’s degree from Columbia University in 1915 and was a member of the Rockefeller Institute (now Rockefeller University) in New York City from 1924 until his death on May 27, 1987.
