Fumaric acid + Water → L-Malic acid
Coenzyme A + NAD + Oxoglutaric acid → Carbon dioxide + NADH + Succinyl-CoA
Adenosine diphosphate + Phosphate + Succinyl-CoA → Adenosine triphosphate + Coenzyme A + Succinic acid
Water + cis-Aconitic acid → D-threo-Isocitric acid
D-threo-Isocitric acid + NADP → Carbon dioxide + NADPH + Oxoglutaric acid
Acetyl-CoA + Oxalacetic acid + Water → Citric acid + Coenzyme A + Hydrogen Ion
L-Malic acid + NAD → Hydrogen Ion + NADH + Oxalacetic acid
L-Malic acid + Quinone → Hydroquinone + Oxalacetic acid
Succinic acid + Ubiquinone-1 → Fumaric acid + Ubiquinol-1
Citric acid → Water + cis-Aconitic acid
Citrate hydro-lyase (cis-aconitate-forming)