John Macleod

John James Rickard Macleod was born on 6 September 1876, a Scottish biochemist and physiologist who spent his career on topics ranging across physiology and biochemistry, with carbohydrate metabolism at the center. During his time as a lecturer at the University of Toronto, he played a part in the discovery and isolation of insulin, work that earned him and Frederick Banting the 1923 Nobel Prize in Physiology or Medicine. The award sparked controversy: Banting's account painted Macleod's contribution as negligible, a version that stuck for years. Only decades after the fact did an independent…