Protein Structure, QuaternaryProtein ConformationModels, MolecularQuaternary Ammonium CompoundsMacromolecular SubstancesDimerizationHemoglobin ACrystallography, X-RayCarboxyhemoglobinProtein MultimerizationAmino Acid SequenceProtein Structure, TertiaryMolecular Sequence DataAllosteric RegulationProtein BindingScattering, RadiationBinding SitesKineticsHemoglobinsUltracentrifugationAspartate CarbamoyltransferaseCircular DichroismScattering, Small AngleEscherichia coliProtein DenaturationX-Ray DiffractionProtein Structure, SecondaryChromatography, GelCross-Linking ReagentsMolecular WeightPorphobilinogen SynthaseOxyhemoglobinsEnzyme StabilityDimethyl SuberimidateStructure-Activity RelationshipProtein FoldingElectrophoresis, Polyacrylamide GelProtein SubunitsErythrocruorinsPhytic AcidSpace SimulationMethemoglobinalpha-CrystallinsHydrogen-Ion ConcentrationCatalysisRecombinant ProteinsX-RaysSolutionsSequence AlignmentSequence Homology, Amino AcidGuanidineHemocyaninModels, ChemicalLigandsCrystallizationStructural Homology, ProteinMicroscopy, ElectronCrystallinsBacterial ProteinsSpectrophotometry, UltravioletAllosteric SiteSpectrometry, FluorescenceMutagenesis, Site-DirectedCrystallographyImidoestersModels, StructuralToyocamycinDisulfidesNeutronsCryoelectron MicroscopyBiopolymersCatalytic DomainEnzyme ReactivatorsL-Iditol 2-DehydrogenaseOctopodiformesUridine Diphosphate Glucose DehydrogenaseSynchrotronsMolecular StructureAmino AcidsCarbon MonoxidePyruvate OxidaseThermodynamicsNitrate Reductase (NADH)TropocollagenThermotoga maritimaCattleGlutaralEscherichia coli ProteinsMolecular ChaperonesSubstrate SpecificityMolecular ConformationSulfhemoglobinPlant LectinsImidesMutationUreaHemeHemoglobins, AbnormalSuccinimidesTemperature