5,10-methenyltetrahydrofolate 5,6,7,8-tetrahydropteridine Bile salt Biotin Bis(molybdopterin guanine dinucleotide)molybdenum cofactor Calcium CoA Cobalamin Cobalt Coenzyme F430 Copper Dipyrromethane Divalent cation FAD FADH(2 Fe(2+) Ferriheme b Flavin Flavoprotein FMN Glutathione Heme Heme b Heme c Heme-thiolate iron Iron-sulfur L-ascorbate magnesium Manganese Metal ions MIO Molybdenum Molybdenum cofactor Molybdopterin Molybdopterin cytosine dinucleotide Molybdopterin guanine dinucleotide Monovalent cation NAD(+) NADP(+) NADPH NAD(P)H NH(4)(+) nickel Potassium Protoheme IX Pyridoxal 5'-phosphate Pyrroloquinoline quinone Pyruvate Riboflavin S-adenosyl-L-methionine Selenium Siroheme Sodium Thiamine diphosphate Thiamine phosphate Tryptophan tryptophylquinone Tungsten Tungsten-molybdopterin Vanadium Zinc