Reaction catalyzed by 4-hydroxyphenylacetate 3-monooxygenase (1.14.14.9)
+
FADH2
+
=
+
FAD
+
H2O
3-(3,4-dihydroxyphenyl)-propanoic acid
+
FADH2
+
O2
=
3-(3,4,5-trihydroxyphenyl)-propanoic acid
+
FAD
+
H2O
