John Howard Northrop

Northrop, John Howard (1891–1987), U.S. biochemist who received the 1946 Nobel Prize for chemistry, with James B. Somner and Wendell M. Stanley, for the crystallization of several pure enzymes (proteins that assist the body's chemical reactions). Professor of bacteriology at the University of California at Berkeley during the 1950s, he was a member of the Rockefeller Institute for Medical Research (now Rockefeller University), 1925–87. Crystalline Enzymes (1939), written with M. Kunitz and R. M. Herriot, is his most important book.

See also: Enzyme.