ID 1.14.13.64 DE 4-hydroxybenzoate 1-hydroxylase. AN 4-hydroxybenzoate 1-monooxygenase. CA (1) 4-hydroxybenzoate + 2 H(+) + NADPH + O2 = CO2 + H2O + hydroquinone + CA NADP(+). CA (2) 4-hydroxybenzoate + 2 H(+) + NADH + O2 = CO2 + H2O + hydroquinone + CA NAD(+). CC -!- The enzyme from Candida parapsilosis is specific for CC 4-hydroxybenzoate derivatives and prefers NADH to NADPH as electron CC donor. //