1.14.16.4	tryptophan 5-monooxygenase	serotonin and melatonin biosynthesis	-	
2.1.1.4	acetylserotonin O-methyltransferase	serotonin and melatonin biosynthesis	-	
2.3.1.87	aralkylamine N-acetyltransferase	serotonin and melatonin biosynthesis	-	
4.1.1.28	aromatic-L-amino-acid decarboxylase	serotonin and melatonin biosynthesis	-