3d image of tryptophan skeletal formula

tryptophan trp amino acid biosynthesis proteins indole essential neurotransmitter serotonin hormone melatonin vitamin b3 zwitterion physiological ph protein membrane cell membrane aromatic acid glycan-protein interaction neurotransmitter tryptophan hydroxylase neurohormone kynurenine niacin auxins phytohormone fructose malabsorption metabolite metabolism cycle mechanism biosynthetic intermediate biogenesis substrate precursor synthesis derivative bioprecursor metabolic endogenous supplement biological activity bioactive food additive nutraceutica dietary 3d