• Born date: 1876-09-06
  • Born in: Scotland
  • Death date: 1935-03-16
  • Death in: Scotland
John James Rickard Macleod

John James Rickard Macleod, FRS (6 September 1876 – 16 March 1935) was a Scottish biochemist and physiologist. He devoted his career to diverse topics in physiology and biochemistry, but was chiefly interested in carbohydrate metabolism. He is noted for his role in the discovery and isolation of insulin during his tenure as a lecturer at the University of Toronto, for which he and Frederick Banting received the 1923 Nobel prize in Physiology or Medicine.

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