Molecular ConformationProtein ConformationErabutoxinsModels, MolecularX-Ray DiffractionMagnetic Resonance SpectroscopyStructure-Activity RelationshipAmino Acid SequenceProtein BindingProtein Structure, SecondaryCrystallography, X-RayCircular DichroismBinding SitesProtein Structure, TertiaryMolecular Sequence DataThermodynamicsKineticsProtein FoldingSpectrometry, FluorescenceNuclear Magnetic Resonance, BiomolecularMolecular Dynamics SimulationHydrogen BondingLigandsModels, ChemicalProtein DenaturationSolutionsMutationHydrogen-Ion ConcentrationTemperatureProtein Structure, QuaternaryPolymorphism, Single-Stranded ConformationalEscherichia coliComputer SimulationMutagenesis, Site-DirectedDimerizationPeptidesRecombinant ProteinsCatalytic DomainAmino Acid SubstitutionAllosteric RegulationTryptophanMolecular StructureSpectrophotometry, UltravioletDNAPeptide FragmentsCatalysisNucleic Acid ConformationProteinsStatic ElectricityCrystallographySolventsProtein MultimerizationFluorescence Resonance Energy TransferAdenosine TriphosphateBacterial ProteinsWaterSubstrate SpecificityHydrolysisCysteineSpectroscopy, Fourier Transform InfraredHydrophobic and Hydrophilic InteractionsDisulfidesCarbohydrate ConformationProtein StabilityAllosteric SiteEscherichia coli ProteinsEpitopesTrifluoroethanolMagnesiumBiophysicsSequence Homology, Amino AcidScattering, Small AngleMacromolecular SubstancesCattleCalorimetryGuanidineCrystallizationApoproteinsFluorescenceSpectrophotometry, InfraredProtonsBiophysical PhenomenaPolydeoxyribonucleotidesSpectrum Analysis, RamanTrypsinCryoelectron MicroscopyDeuterium Exchange MeasurementAnilino NaphthalenesulfonatesMutant ProteinsMotionEnzyme StabilityStructural Homology, ProteinModels, BiologicalPoint MutationAmino Acid MotifsProtein UnfoldingEntropySequence AlignmentEnergy TransferElectrophoresis, Polyacrylamide Gel