Quaternary Ammonium CompoundsBetaineAminesProtein Structure, QuaternaryAmine Oxidase (Copper-Containing)Biogenic AminesModels, MolecularProtein ConformationStereoisomerismCrystallography, X-RayKineticsMacromolecular SubstancesHemoglobin AMolecular StructureDimerizationBenzalkonium CompoundsCarboxyhemoglobinMolecular Sequence DataAmino Acid SequenceBinding SitesStructure-Activity RelationshipProtein MultimerizationCatalysisAllosteric RegulationProtein BindingHemoglobinsProtein Structure, TertiaryDisinfectantsOctopamineReceptors, Biogenic AmineTyramineHeterocyclic CompoundsPalladiumHydrogen-Ion ConcentrationSemicarbazidesOxidoreductases Acting on CH-NH Group DonorsCetylpyridiniumEscherichia coli