William G. Kaelin Jr. is an American Nobel laureate physician-scientist. He is a professor of medicine at Harvard University and the Dana–Farber Cancer Institute where his laboratory studies tumor suppressor proteins. He is the recipient of numerous awards including the Albert Lasker Award for Basic Medical Research and the AACR Princess Takamatsu Award . In 2019 he won the Nobel Prize in Physiology or Medicine in with Peter J. Ratcliffe and Gregg L. Semenza for their work on how cells sense and adapt to oxygen availability. The Nobel Prize in Physiology or Medicine 2019, announced October 7, 2019. William G. Kaelin Jr, Sir Peter J. Ratcliffe, and Gregg L. Semenza, “for their discoveries of how cells sense and adapt to oxygen availability”. William G. Kaelin Jr: born 1957, New York, NY, USA. Sir Peter J. Ratcliffe: born 1954, Lancashire, United Kingdom. Gregg L. Semenza: born 1956, New York, NY, USA. Wiki link Wiki link Wiki link Data: the Nobel Foundation (CC0).