The enzymic oxidation of tryptophan to 5-hydroxytryptophan in the biosynthesis of serotonin.
D006916:5-Hydroxytryptophan; D010084:Oxidation-Reduction; D012701:Serotonin / Q000378:metabolism*; D014364:Tryptophan / Q000378:metabolism*
D012701:Serotonin; D014364:Tryptophan; D006916:5-Hydroxytryptophan
SEROTONIN/metabolism; TRYPTOPHAN/metabolism