Molecular ConformationProtein ConformationErabutoxinsX-Ray DiffractionModels, MolecularMagnetic Resonance SpectroscopyStructure-Activity RelationshipAmino Acid SequenceProtein BindingCrystallography, X-RayProtein Structure, SecondaryMolecular Sequence DataCircular DichroismBinding SitesProtein Structure, TertiaryThermodynamicsProtein FoldingHydrogen BondingSolutionsKineticsNuclear Magnetic Resonance, BiomolecularPolymorphism, Single-Stranded ConformationalMutationModels, ChemicalMolecular Dynamics SimulationLigandsSpectrometry, Fluorescence