Amino Acids, EssentialAmino AcidsThreonineSequence Homology, Amino AcidAmino Acid SequenceLeucineDietary ProteinsAmino Acid SubstitutionIsoleucineNitrogenAmino Acid Transport SystemsPhenylalanineCloning, MolecularKeto AcidsBuchneraAmino Acids, Branched-ChainMethionineNutritional RequirementsMolecular Sequence DataLysineTryptophanBase SequenceSequence AlignmentMutagenesis, Site-DirectedAmino Acids, AromaticGlutamineMutationEscherichia coliBinding SitesValineHistidinolKineticsCaseinsAphidsArginineBromusRecombinant ProteinsAmino Acid MotifsThreonine DehydrataseSubstrate SpecificityModels, MolecularProtein Structure, TertiaryProtein ConformationProteinsSymbiosisDietStructure-Activity RelationshipProtein BiosynthesisAlanineCell LineLarge Neutral Amino Acid-Transporter 1Muscle ProteinsBacterial ProteinsDNA, ComplementaryProtein BindingUreaNutritive ValueGlycinePhylogenySequence Homology, Nucleic AcidPeptide FragmentsIndoleamine-Pyrrole 2,3,-DioxygenaseRNA, MessengerSwineZeinCattleConserved SequenceKynurenineAmino Acids, SulfurParenteral NutritionPhosphorylationHistidineSerineGenes, BacterialSequence Analysis, DNAAspartic AcidCryptophytaBiological TransportCulture MediaLiverDNA PrimersProlinePeptidesCystineDNACarbon IsotopesDiet, Protein-RestrictedCysteineChromatography, High Pressure LiquidBlood Urea NitrogenRestriction MappingRecombinant Fusion ProteinsTyrosineMolecular WeightTOR Serine-Threonine KinasesAnimal Nutritional Physiological PhenomenaBody WeightDietary SupplementsElectrophoresis, Polyacrylamide GelMilk Proteins