. . . "1909-12-14Z"^^ . "1975-11-05Z"^^ . . . . "1909Z"^^ . . "Edward Lawrie Tatum"@en . . . . . . "geneticsscientist" . "1975Z"^^ . "Edward Lawrie Tatum (December 14, 1909 \u2013 November 5, 1975) was an American geneticist. He shared half of the Nobel Prize in Physiology or Medicine in 1958 with George Wells Beadle for showing that genes control individual steps in metabolism. The other half of that year's award went to Joshua Lederberg.Beadle and Tatum's key experiments involved exposing the bread mold Neurospora crassa to x-rays, causing mutations."@en . "Tatum, Edward Lawrie"@en .