AcetalsButanesMolecular StructureStereoisomerismIsotope LabelingCatalysisAmino Acid SubstitutionMolecular Sequence DataAmino Acid SequenceMutationBase SequenceMutagenesis, Site-DirectedPoint MutationStructure-Activity RelationshipModels, MolecularEvolution, MolecularBinding SitesMutation, MissenseSequence AlignmentPhylogenyEscherichia coliProtein ConformationSequence Homology, Amino AcidMutagenesisDNA Mutational AnalysisKineticsCodonAlanineProtein Structure, TertiaryGenetic VariationSequence Analysis, DNAProtein Binding