L-Phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase (4-hydroxylating)
Phenylalanine 4 Hydroxylase
Phenylalanine 4 Monooxygenase
An enzyme of the oxidoreductase class that catalyzes the formation of L-TYROSINE, dihydrobiopterin, and water from L-PHENYLALANINE, tetrahydrobiopterin, and oxygen. Deficiency of this enzyme may cause PHENYLKETONURIAS and PHENYLKETONURIA, MATERNAL. EC 18.104.22.168.