ASMT
UniProt:P46597 ASMT
AANAT
SNAT
UniProt:Q16613 AANAT
Tryptophan is hydroxylated
Decarboxylation of 5-hydroxytryptophan forms serotonin
N-acetylation of serotonin
Methylation of N-acetyl-5-HT to form melatonin
Serotonin and melatonin biosynthesis