Electron Transport Complex IVCopperElectron Spin Resonance SpectroscopyMetalloproteinsHemeCytochrome a GroupOxidation-ReductionZincParacoccus denitrificansCytochrome b GroupCytochromes aBinding SitesRutheniumPhosphoric Triester HydrolasesCytochromesSpectrophotometryOxygenProton PumpsIronCytochromes a3Spectrum AnalysisOxidoreductasesElectron TransportModels, MolecularOrganometallic CompoundsDithioniteSpectrum Analysis, RamanProtonsHemocyaninThermus thermophilusCatalysisCatechol OxidaseOrganic Chemistry PhenomenaSpectroscopy, Fourier Transform InfraredCatalytic DomainCrystallography, X-RayAcid PhosphataseCyanidesManganeseMonophenol MonooxygenaseAspergillus nidulansMolecular Sequence DataKineticsCattleCarbon MonoxideHistidineProtein ConformationRhodobacter sphaeroidesAmino Acid SequenceFerrous CompoundsFungal ProteinsEscherichia coliMetalsSpectrophotometry, InfraredElectron Transport Chain Complex ProteinsApoenzymesModels, ChemicalLigandsIron-Sulfur ProteinsOxygenasesBacillus cereusCysteineElectrochemistryPolyploidyMagnetic Resonance SpectroscopyHydrogen-Ion ConcentrationArginaseProtein BindingMolecular StructureBacterial ProteinsMutagenesis, Site-DirectedCeruloplasminCobaltRibonucleotide ReductasesIonsEscherichia coli ProteinsBase SequenceProtein Structure, TertiaryMitochondria, HeartMixed Function OxygenasesMagneticsMacromolecular SubstancesGene Expression Regulation, FungalProtein Structure, SecondarySubstrate SpecificityStructure-Activity RelationshipDNATranscription FactorsThermodynamicsTemperatureRecombinant ProteinsDNA-Binding ProteinsCircular DichroismMolecular ConformationSaccharomyces cerevisiae Proteinsbeta-LactamasesWaterHydrolysisHydrogen BondingSequence Alignment