Amino Acid SequenceMolecular Sequence DataBinding SitesMutagenesis, Site-DirectedModels, MolecularProtein Conformationsrc Homology DomainsProtein BindingProtein Structure, TertiarySequence Homology, Amino AcidProtein Structure, SecondaryMutationStructure-Activity RelationshipBase SequenceAmino Acid SubstitutionKineticsCysteineSequence AlignmentRecombinant ProteinsEscherichia coliSubstrate SpecificityPeptide FragmentsAmino AcidsDrug ResiduesCloning, MolecularCrystallography, X-RayPeptidesTyrosinePesticide ResiduesLysineHistidineRecombinant Fusion ProteinsPhosphorylationConserved SequenceCell LineMagnetic Resonance SpectroscopyCatalysisCatalytic DomainAmino Acid MotifsCircular DichroismMutagenesisBacterial ProteinsAlaninePoint MutationHydrogen-Ion ConcentrationProtein FoldingTryptophanSerineAspartic AcidProlineArginineNuclear Magnetic Resonance, BiomolecularElectrophoresis, Polyacrylamide GelAdaptor Proteins, Signal TransducingLigandsHydrogen BondingDisulfidesCOS CellsTrypsinCattleCarrier ProteinsChromatography, High Pressure LiquidDimerizationTransfectionDNA PrimersDNADNA, ComplementaryMembrane ProteinsHydrolysisProteinsSulfhydryl CompoundsModels, ChemicalProtein Processing, Post-TranslationalMolecular WeightPeptide MappingPlasmidsAsparagineHydrophobic and Hydrophilic InteractionsThreonineThermodynamicsCell MembraneSignal TransductionProtein-Tyrosine KinasesSpectrometry, FluorescenceMolecular StructureSequence DeletionStatic ElectricityMass SpectrometryCyanogen BromideSH2 Domain-Containing Protein Tyrosine PhosphatasesEnzyme StabilityDiethyl PyrocarbonateEscherichia coli ProteinsCarbohydrate SequencePhosphotyrosineSaccharomyces cerevisiaeProtein Structure, QuaternaryMacromolecular SubstancesCricetinaePhosphoproteins