PMID 12040175. 1 2 The Nobel Prize in Physiology or Medicine 1994, Illustrated Lecture. ↑ Press Release: The Nobel Assembly at the Karolinska Institute decided to award the Nobel Prize in Physiology or Medicine for 1994 jointly to Alfred G. Gilman and Martin Rodbell for their discovery of "G-proteins and the role of these proteins in signal transduction in cells".