- coenzyme - a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
--1 is a kind of molecule
--1 has particulars:cocarboxylase, thiamine pyrophosphate; coenzyme A; nicotinamide adenine dinucleotide, NAD; nicotinamide adenine dinucleotide phosphate, NADP; triphosphopyridine nucleotide; ubiquinone, coenzyme Q