4.1.1.48 Biosynthesis of secondary metabolites - 01110 4.1.1.48 L-tryptophan biosynthesis - - 4.1.1.48 Metabolic pathways - 01100 4.1.1.48 Phenylalanine, tyrosine and tryptophan biosynthesis - 00400 4.1.1.48 tryptophan metabolism tryptophan metabolism -