ID 1.14.13.3 DE 4-hydroxyphenylacetate 3-monooxygenase. AN 4 HPA 3-hydroxylase. AN 4-hydroxyphenylacetic acid-3-hydroxylase. AN p-hydroxyphenylacetate 3-hydroxylase. CA 4-hydroxyphenylacetate + NADH + O(2) = 3,4-dihydroxyphenylacetate + CA NAD(+) + H(2)O. CF FAD. //