PhenylalaninePhenylalanine HydroxylaseAmino AcidsPhenylalanine Ammonia-LyaseSequence Homology, Amino AcidPhenylketonuriasAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialMolecular Sequence DataAmino Acids, AromaticKineticsTyrosineLeucinePhenylpyruvic AcidsMutationAmino Acid Transport SystemsMutagenesis, Site-DirectedBase SequenceBinding SitesEscherichia coliSequence Alignment