Protein ConformationModels, MolecularProtein BindingBinding SitesProtein Structure, TertiaryCrystallography, X-RayProtein Structure, SecondarySpectrometry, FluorescenceCircular DichroismKineticsMolecular Sequence DataAmino Acid SequenceMolecular ConformationThermodynamicsLigandsHydrogen-Ion ConcentrationProtein FoldingNucleic Acid ConformationStructure-Activity RelationshipMagnetic Resonance SpectroscopyEscherichia coliModels, ChemicalMolecular Dynamics SimulationProtein Structure, QuaternaryMutagenesis, Site-DirectedMutationProtein DenaturationDimerizationTemperatureTryptophanAllosteric RegulationNuclear Magnetic Resonance, BiomolecularAdenosine TriphosphateRecombinant ProteinsHydrogen BondingCatalytic DomainFluorescence Resonance Energy TransferCatalysisAmino Acid SubstitutionHydrolysisCysteineSpectrophotometry, UltravioletBacterial ProteinsFluorescenceAllosteric SiteProtein MultimerizationComputer SimulationEscherichia coli ProteinsMagnesiumSubstrate SpecificityPeptide FragmentsAnilino NaphthalenesulfonatesSolutionsCryoelectron MicroscopyTrypsinNaphthalenesulfonatesStatic ElectricitySpectroscopy, Fourier Transform InfraredPeptidesMacromolecular SubstancesBase SequenceApoproteinsDisulfidesFluorescent DyesCalorimetryAdenosine DiphosphateCattleAdenosine TriphosphatasesCrystallographyModels, BiologicalDNAMolecular StructureCalciumSequence Homology, Amino AcidSolventsEpitopesAcrylamideNucleotidesEnergy TransferDeuterium Exchange MeasurementHydrophobic and Hydrophilic InteractionsProteinsProtein SubunitsGuanidineProtonsX-Ray DiffractionElectrophoresis, Polyacrylamide GelMutant ProteinsScattering, RadiationBiophysicsWaterCell MembraneOxidation-ReductionScattering, Small AngleCross-Linking ReagentsTitrimetrySpectrophotometry, InfraredMotionMembrane FusionAdenylyl Imidodiphosphate