Reaction catalyzed by tryptophan 5-monooxygenase (1.14.16.4)
+
+
=
+
L-tryptophan
+
(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin
+
O2
=
5-hydroxy-L-tryptophan
+
4a-hydroxytetrahydrobiopterin
