ID 1.14.13.62 DE 4-hydroxyquinoline 3-monooxygenase. AN 1-H-4-oxoquinoline 3-monooxygenase. AN quinolin-4(1H)-one 3-monooxygenase. CA H(+) + NADH + O2 + quinolin-4-ol = H2O + NAD(+) + quinoline-3,4-diol. CC -!- quinolin-4-ol exists largely as the quinolin-4(1H)-one tautomer. //