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The Krebs cycle (citric acid cycle ) is the second step in cellular respiration. Pyruvate molecules are broken down while their energy is harvested. Learn about the citric acid cycle , also known as the Krebs cycle , a series of biochemical reactions that release energy from nutrients. See the diagram , overview, discovery, and reactions of the cycle . For ATP to be produced by oxidative phosphorylation, electrons are needed. These come from electron carriers produced by the TCA cycle . Learn about the Krebs cycle , a series of reactions that oxidize acetyl coenzyme A to CO2 and H2O, with the help of diagrams and detailed descriptions. Find out how the Krebs cycle is involved in the metabolism of carbohydrates, lipids and proteins, and how it produces ATP and other compounds.
