has part has part has role polar amino acid tryptophan triptofano CHEBI:27897 An alpha-amino acid that is alanine bearing an indol-3-yl substituent at position 3. tryptophan KNApSAcK:C00001396 Tryptophan CHEBI:27163 Htrp CHEBI:9769 alpha-Amino-beta-(3-indolyl)-propionic acid tryptophane LINCS:LSM-36836 W Wikipedia:Tryptophan Trp beta-3-indolylalanine alpha-amino-beta-3-indolepropionic acid 2-amino-3-(1H-indol-3-yl)propanoic acid KEGG:C00806 tryptophanate tryptophanium alpha-amino acid aromatic amino acid aminoalkylindole 1H-indol-3-ylmethyl group tryptophan zwitterion Daphnia magna metabolite