In this lesson, we examine the entire glycolytic pathway. We use as our theme the transfer of oxygen from phosphate to newly generated water. This explains why the standard stoichiometry of glycolysis found in textbooks show it generating two water molecules, and ties the information together with the analogous principles from substrate-level phosphorylation in the citric acid cycle and the relative differences in water consumption and carbon dioxide generation between fat and carbohydrate. As with our discussion of the citric acid cycle, we also reveal why the standard stoichiometry of glycolysis is misleading and why, when we account for atoms rather than molecules, we find glycolysis to be net water-neutral.
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