1.14.14.20 phenol + FADH2 + O2 = catechol + FAD + H2O - - 1.14.14.20 phenol + FADH2 + O2 = catechol + FAD + H2O smaller flavin reductase PheA2 component catalyzes the NADH-dependent reduction of free FAD according to a ping pong bisubstrate-biproduct mechanism -, 736400