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Krebs' cy"cle

a cycle of enzyme-catalyzed reactions in living cells that is the final series of reactions of aerobic metabolism of carbohydrates, proteins, and fatty acids, and by which carbon dioxide is produced, oxygen is reduced, and ATP is formed. Also called citric acid cycle, tricarboxylic acid cycle.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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