Enzyme Nomenclature. Recommendations
EC 1.20.1 With NAD+ or NADP+ as acceptor
EC 1.20.2 With a cytochrome as acceptor
EC 1.20.4 With disulfide as acceptor
EC 1.20.9 With a copper protein as acceptor
EC 1.20.98 With other, known, physiological acceptors
EC 1.20.99 With unknown physiological acceptors