Acetyl-CoA Citrate CoA Citrate Synthase Oxaloacetate Citrate Isocitrate Aconitase Isocitrate a-Ketogluterate NADH Isocitrate Dehydrogenase NAD Succinyl-CoA a-Ketoglutarate Dehydrogenase NADH CO2 a-Ketogluterate NAD CoA CO2