Stanley, William Meredith, 1904–71, American biochemist, b. Ridgeville, Ind., Ph.D. Univ. of Illinois, 1929. He was a professor at the Rockefeller Institute for Medical Research (now Rockefeller Univ.) from 1932 to 1948 and at the Univ. of California, Berkeley, from 1948 to 1971. Stanley was a corecipient with James Sumner and John Northrop of the Nobel Prize in Chemistry in 1946. He and Northrop were cited for their preparation of enzymes and virus proteins in a pure form. Stanley crystallized the tobacco mosaic virus and established its molecular structure, paving the way for other scientists to determine the molecular structures and propagation modes of other viruses.