#coenzyme  a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
  supertype:  molecule  (physics and chemistry) the simplest structural unit of an element or compound
  subtype:  cocarboxylase__thiaminepyrophosphate  a coenzyme important in respiration in the Krebs cycle
  subtype:  coenzyme_A  a coenzyme present in all living cells; essential to metabolism of carbohydrates and fats and some amino acids
  subtype:  nicotinamide_adenine_dinucleotide__NAD  a coenzyme derived from the B vitamin nicotinic acid
  subtype:  triphosphopyridine_nucleotide  a coenzyme of several enzymes
  subtype:  ubiquinone__coenzyme_Q  any of several quinones that function as electron-carrying coenzymes

No statement uses or specializes coenzyme; click here to add one.