Amino AcidsAmino Acid SequenceTyrosine-tRNA LigaseMolecular Sequence DataModels, MolecularBenzophenonesAmino Acyl-tRNA SynthetasesMutagenesis, Site-DirectedAmino Acid SubstitutionBinding SitesProtein ConformationProtein EngineeringPhenylalanineSequence Homology, Amino AcidEscherichia coliGenetic CodeBase SequenceRNA, Transfer, TyrAminoacylationProtein Structure, SecondaryMutationStructure-Activity RelationshipProtein Structure, TertiaryProteinsMethanocaldococcusMonoiodotyrosineTransfer RNA AminoacylationKineticsHydrogen BondingCloning, MolecularCodon, NonsenseRNA, TransferCrystallography, X-RayGenes, SuppressorSequence AlignmentProtein BindingSubstrate SpecificityThioamidesMolecular StructureMethyltyrosinesPeptidesSpectroscopy, Fourier Transform InfraredGlutamate-tRNA LigaseAlaninePyrococcus horikoshiiSuppression, GeneticCodon, TerminatorMutagenesisRecombinant ProteinsBoron CompoundsPeptide FragmentsRNA, Transfer, Amino AcylTyrosineSequence Analysis, ProteinPlasmidsMagnetic Resonance SpectroscopyProtein BiosynthesisCatalysisAzidesCatalytic DomainDNA, ComplementaryAmino Acid MotifsLigandsBacterial ProteinsDatabases, ProteinSequence Homology, Nucleic AcidConserved SequenceCysteineProtein FoldingRecombinant Fusion ProteinsDNAGenetic EngineeringModels, ChemicalLysineXenopus laevisMolecular WeightCell LineThermodynamicsStatic ElectricityElectrophoresis, Polyacrylamide GelCircular DichroismChromatography, High Pressure LiquidRestriction MappingTrypsinSolventsCyanogen BromideAspartic AcidCattleHistidineDNA PrimersPoint MutationHydrogen-Ion ConcentrationComputer SimulationGenes, BacterialTryptophanArginineAmino Acids, EssentialHydrolysisLeucineCarrier Proteins