Hans Krebs

The Krebs cycle, also known as the citric acid cycle or tricarboxylic acid cycle, is the central metabolic pathway by which cells oxidize nutrients to produce energy in the form of ATP. Hans Krebs identified it in 1937 while working at the University of Sheffield, demonstrating how cells systematically break down carbohydrates, fats, and proteins through a cyclical series of enzyme-catalyzed reactions.

Yes, Hans Krebs was awarded the Nobel Prize in Physiology or Medicine in 1953, sharing it with Fritz Lipmann for their complementary discoveries in cellular metabolism. Krebs was specifically honored for identifying the citric acid cycle, which became one of the most fundamental concepts in biochemistry.

Hans Krebs, who was of Jewish heritage, was dismissed from his position at the University of Freiburg in 1933 when the Nazi regime barred Jewish academics from employment. He emigrated to Britain, where he had previously studied, and was offered a position at the University of Cambridge before moving to Sheffield where he made his Nobel Prize-winning discoveries.

In addition to the citric acid cycle, Krebs discovered the urea cycle in 1932, which explains how the liver converts toxic ammonia into urea for excretion through the kidneys. This earlier discovery established Krebs as a leading figure in biochemistry even before his more famous work on cellular energy production.