Oxidation-ReductionMagnetic Resonance SpectroscopyElectron Spin Resonance SpectroscopySpectrum AnalysisSpectrum Analysis, RamanSpectroscopy, MossbauerSpectroscopy, Near-InfraredX-Ray Absorption SpectroscopyManganeseIronSpectrophotometryOxygenSpectrophotometry, InfraredPhosphinesModels, MolecularKineticsHemeMolecular StructureSpectrometry, X-Ray EmissionCopperPhotosystem II Protein ComplexSpectrophotometry, UltravioletSulfurX-RaysMyoglobinSulfhydryl CompoundsIron-Sulfur ProteinsProtein ConformationElectronsHydrogen PeroxideVanadiumHemeproteinsWaterHydrogen-Ion ConcentrationCircular DichroismModels, ChemicalCatalysisFerrous CompoundsChemistry, BioinorganicOxidoreductasesCysteineMetalloproteinsIron CompoundsProstaglandins GElectrochemistryMolybdenumChromatiumReducing AgentsSulfur CompoundsCoordination ComplexesElectron TransportProtonsDithioniteMass SpectrometryFerric CompoundsBinding SitesCyanidesPeroxidasesSpectrometry, FluorescenceOrganometallic CompoundsMolecular ConformationCrystallography, X-RayNuclear Magnetic Resonance, BiomolecularCytochrome c GroupMolecular Sequence DataMetmyoglobinSolutionsTemperatureMethyltransferasesPeroxidesMethemoglobinProtein BindingDisulfidesHorsesAmino Acid SequenceQuantum TheoryArsenicGlutathioneFree RadicalsPhotosynthetic Reaction Center Complex ProteinsSulfidesCytochrome a GroupFerredoxinsSulfenic AcidsChromiumDithiothreitolElectron Transport Complex IVSpinacia oleraceaChromatography, High Pressure LiquidCytochrome-c PeroxidaseMolybdoferredoxinLigandsThermodynamicsCeriumHemoglobinsCreatinePhotoelectron SpectroscopyEscherichia coliArsenitesNickel