Protein ConformationModels, MolecularProtein Structure, TertiaryBinding SitesLigandsProtein BindingMolecular Dynamics SimulationProtein Structure, SecondaryMolecular Sequence DataCrystallography, X-RayAmino Acid SequenceKineticsMutagenesis, Site-DirectedCircular DichroismMolecular ConformationThermodynamicsSpectrometry, FluorescenceProtein FoldingMagnetic Resonance SpectroscopyNucleic Acid ConformationNuclear Magnetic Resonance, BiomolecularProtein DenaturationModels, ChemicalStructure-Activity RelationshipHydrogen-Ion ConcentrationTemperatureHydrogen BondingMutationEscherichia coliProtein Structure, QuaternaryComputer SimulationAllosteric RegulationDimerizationSolutionsRecombinant ProteinsTryptophanCatalytic DomainPolymorphism, Single-Stranded ConformationalFluorescence Resonance Energy TransferSpectrophotometry, UltravioletAmino Acid SubstitutionCatalysisPeptidesAdenosine TriphosphatePeptide FragmentsBacterial ProteinsSolventsStatic ElectricityHydrolysisProtein MultimerizationEpitopesCysteineProteinsAllosteric SiteFluorescenceSpectroscopy, Fourier Transform InfraredMolecular StructureBase SequenceSubstrate SpecificityEscherichia coli ProteinsGuanidineProtein StabilityEntropyDNACalorimetryDisulfidesWaterHydrophobic and Hydrophilic InteractionsMotionCryoelectron MicroscopyCrystallographyBiophysicsApoproteinsDeuterium Exchange MeasurementAnilino NaphthalenesulfonatesMagnesiumProtein UnfoldingMacromolecular SubstancesEnergy TransferTrypsinTrifluoroethanolScattering, Small AngleCattleSpectrophotometry, InfraredEnzyme StabilityProtonsEpitope MappingSequence Homology, Amino AcidMutant ProteinsBiophysical PhenomenaNaphthalenesulfonatesModels, BiologicalX-Ray DiffractionAntibodies, MonoclonalFluorescent DyesScattering, RadiationCalorimetry, Differential ScanningAdenosine DiphosphateNucleotidesPliability