Alfred G. Gilman

Alfred Goodman Gilman (July 1, 1941 – December 23, 2015) was an American pharmacologist and biochemist. 
He discovered G-proteins. For his discovery, Gilman won the Nobel Prize in Physiology or Medicine in 1994. He shared the prize with Martin Rodbell
Gilman died of pancreatic cancer in Dallas, Texas on December 23, 2015 at the age of 74.