Warburg, Otto Heinrich (ŏtˈō hĪnˈrĭkh värˈbŏrkh) [key], 1883–1970, German physiologist. He was director (1931–53) of the Kaiser Wilhelm Institute (now Max Planck Institute) for cell physiology at Berlin. He investigated the metabolism of tumors and the respiration of cells, particularly cancer cells. For his discovery of the nature and the mode of action of (Warburg's) yellow enzyme, he won the 1931 Nobel Prize in Physiology or Medicine. He edited The Metabolism of Tumours (tr. 1931) and wrote New Methods of Cell Physiology (1962).
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