Amino AcidsSequence Homology, Amino AcidSubstance PAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularMolecular Sequence DataBase SequenceBinding SitesAmino Acids, EssentialKineticsAmino Acid Transport SystemsSequence AlignmentMutationEscherichia coliModels, MolecularProtein ConformationProtein BindingAmino Acid MotifsPeptide FragmentsRecombinant ProteinsCell Adhesion MoleculesSubstance-Related DisordersCell LineStructure-Activity RelationshipMutagenesis, Site-DirectedMolecular WeightPeptidesDNA, ComplementaryProtein Structure, TertiaryDNASequence Homology, Nucleic AcidSubstrate SpecificityBacterial ProteinsNeutral RedLeucineAmino Acids, AromaticElectrophoresis, Polyacrylamide GelRNA, MessengerProteinsHydrogen-Ion ConcentrationAmino Acids, Branched-ChainChromatography, High Pressure LiquidRecombinant Fusion ProteinsAmino Acids, SulfurCattleCarrier ProteinsProtein Structure, SecondaryPhylogenySpecies SpecificityRestriction MappingAmino Acids, NeutralPlasmidsCells, CulturedBiological TransportAlanineSequence Analysis, DNANeutral CeramidaseMembrane ProteinsDNA PrimersGenes, BacterialTransfectionCell MembraneReceptors, Neurokinin-1LysineConserved SequenceRabbitsTrypsinAmino Acid Transport Systems, BasicMolecular StructureSignal TransductionMacromolecular SubstancesSubstance Abuse Treatment CentersTime FactorsChromatography, GelIsoleucinePolymerase Chain ReactionGene ExpressionGlycineHydrolysisTemperatureEpitopesTranscription, GeneticArginineGenesAntibodies, MonoclonalSaccharomyces cerevisiaeProtein BiosynthesisCodonEvolution, MolecularCyanogen BromideCysteineMagnetic Resonance SpectroscopyAmino Acids, BasicCricetinaeSmall Molecule LibrariesCrystallography, X-RayTryptophanPhenylalanineMutagenesis