Main Reaction: Tryptophan >> 5-Hydroxytryptophan

Reference: PubMed ID: 25213934
Authors: Rodriguez-Naranjo MI, Gil-Izquierdo A, Troncoso AM, Cantos-Villar E, Garcia-Parrilla MC
Title: Melatonin is synthesised by yeast during alcoholic fermentation in wines.
Published: 2011 Jun 15

Tryptophan --> 5-Hydroxytryptophan