Mario Ramberg Capecchi (Italian: [ˈmaːɾjo kaˈpekki]; born October 6, 1937) is an Italian-born American molecular geneticist and a co-awardee of the 2007 Nobel Prize in Physiology or Medicine for discovering a method to create mice in which a specific gene is turned off, known as knockout mice. He shared the prize with Martin Evans and Oliver Smithies. Capecchi is Distinguished Professor of Human Genetics and Biology at the University of Utah School of Medicine.
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