Refers to the Krebs cycle (also called citric acid cycle), a fundamental metabolic pathway in living cells that produces energy.
Named after Hans Krebs, the German biochemist who discovered the cycle in 1937. It's an eponym, a word derived from a person's name.
Hans Krebs won a Nobel Prize for discovering this cycle that happens inside almost every living cell on Earth—the Krebs cycle is so fundamental that it's basically the engine powering all complex life, yet most people have never heard of it.
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