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