Coenzyme A 5-C0A Acetyl NAD NADH CH group ACETYL PYRUVIC ACID CoeNZYMEA AcetyL CoA 2 carbons 三羧酸循环 Citric acid NAD KREBS CYCLE ●●●●0● CO, leaves cyde Malic ●0●● NAD ATP ADP (Substrate FADH phosphorylation) P a-Ketoglutaric acid FAD acid ●●●● O, leaves cycle NADHNAD+ ● Carbons三羧酸循环