Microscopy, ElectronElectronsElectron TransportMicroscopy, Electron, ScanningWeight GainMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyOxidation-ReductionModels, MolecularMicroscopy, Electron, Scanning TransmissionSpectrometry, Mass, Fast Atom BombardmentElectron Probe MicroanalysisProtein ConformationKineticsMolecular Sequence DataElectron Transport Complex IVCrystallography, X-RayMolecular StructureModels, ChemicalElectron Transport Complex IIIHydrogenBinding SitesAmino Acid SequenceMagnetic Resonance SpectroscopyMolecular ConformationX-Ray DiffractionSpectrophotometrySulfurHydrogen BondingSpectrum AnalysisOxidoreductasesOxygenFerredoxinsWaterCattleIronHydrogen-Ion ConcentrationEscherichia coliMass SpectrometryProtein BindingCryoelectron MicroscopyBacterial ProteinsCytochrome c GroupHemeThermodynamicsCopperPhotosynthesisQuantum TheoryProtonsCatalysisTime FactorsTemperatureElectron Transport Chain Complex ProteinsPhotosynthetic Reaction Center Complex ProteinsIron-Sulfur ProteinsMicroscopy, ImmunoelectronStructure-Activity RelationshipElectrochemistryFree RadicalsCytochromesSpin LabelsCrystallizationCell MembraneProteinsMutationElectron Transport Complex IOxygen IsotopesPhotosystem I Protein ComplexFerricyanidesFlavinsMitochondriaLightUbiquinoneChemistryProtein Structure, TertiaryProtein Structure, SecondaryCarbonModels, BiologicalChlorophyllStereoisomerismBody WeightChemical PhenomenaFreeze FracturingSurface PropertiesComputer SimulationMolybdenumZincHistocytochemistryAmino AcidsSubstrate SpecificityStaining and LabelingMolecular WeightSpectrophotometry, UltravioletPlastocyaninFerric CompoundsSwineFlavin-Adenine DinucleotideRabbitsRhodobacter sphaeroidesFlavin Mononucleotide