Amino Acid SequenceNeurotoxinsAmino AcidsMolecular Sequence DataSequence Homology, Amino AcidAmino Acid SubstitutionBase SequenceCloning, MolecularBotulinum ToxinsMutagenesis, Site-DirectedBinding SitesModels, MolecularMutationSequence AlignmentProtein ConformationStructure-Activity RelationshipEscherichia coliProtein Structure, TertiaryRecombinant ProteinsKineticsPeptide FragmentsProtein BindingSubstrate SpecificityProtein Structure, SecondaryDNA, ComplementaryPeptidesAmino Acid MotifsSequence Homology, Nucleic AcidTetanus ToxinElapid VenomsBacterial ProteinsDNACell LineRecombinant Fusion ProteinsConserved SequenceMolecular WeightCobra Neurotoxin ProteinsPoint MutationBotulinum Toxins, Type AAlanineRestriction MappingElectrophoresis, Polyacrylamide GelAmino Acids, EssentialClostridium botulinumDNA PrimersPlasmidsPhylogenyTrypsinCysteineChromatography, High Pressure LiquidLysineMutagenesisAmino Acid Transport SystemsGenes, BacterialSequence Analysis, DNACircular DichroismErabutoxinsSpecies SpecificityCattleCyanogen BromideAspartic AcidLeucineProteinsCatalysisMarine ToxinsSnake VenomsMembrane ProteinsCarrier ProteinsCodonHydrolysisAmino Acids, AromaticArginineTryptophanSequence DeletionPolymerase Chain ReactionBotulismMagnetic Resonance SpectroscopyCrystallography, X-RayRNA, MessengerEvolution, MolecularGlycineHydrogen-Ion ConcentrationTransfectionSynaptosomal-Associated Protein 25Macromolecular SubstancesAmino Acids, BasicSaccharomyces cerevisiaeHistidineElapidaeScorpion VenomsDNA Mutational AnalysisIsoleucineCatalytic DomainSerineGenesEndopeptidasesCell MembraneSequence AnalysisCobra VenomsProline