1st product of tryptophan catabolism is
kynurenine
Bradykinin
PAF
Xantheurenate
Tryptophan is an aromatic essential amino acid The major metabolic fate of tryptophan is to be oxidized by tryptophan pyrrolase (tryptophan di-oxygenase) It is a hemoprotein. The enzyme is inducible by coicosteroids. <img src=" /> in tryptophan catabolism the first product is 3-hydroxykynurenine ref Satyanarayana 4th ed page 145
vitamins