Microscopy, ElectronElectronsElectron TransportMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyOxidation-ReductionModels, MolecularMicroscopy, Electron, Scanning TransmissionSpectrometry, Mass, Fast Atom BombardmentElectron Probe MicroanalysisProtein ConformationKineticsElectron Transport Complex IVCrystallography, X-RayModels, ChemicalMolecular StructureElectron Transport Complex IIIHydrogenMolecular Sequence DataBinding SitesMolecular ConformationMagnetic Resonance SpectroscopySpectrophotometryX-Ray DiffractionSulfurHydrogen BondingSpectrum AnalysisOxidoreductasesAmino Acid SequenceFerredoxinsOxygenWaterIronCryoelectron MicroscopyCytochrome c GroupHemeHydrogen-Ion ConcentrationMass SpectrometryEscherichia coliBacterial ProteinsElectron Transport Chain Complex ProteinsThermodynamicsCopperQuantum TheoryProtonsPhotosynthetic Reaction Center Complex ProteinsCatalysisIron-Sulfur ProteinsPhotosynthesisProtein BindingMicroscopy, ImmunoelectronElectrochemistryFree RadicalsCytochromesSpin LabelsTemperatureElectron Transport Complex ICrystallizationStructure-Activity RelationshipCell MembraneOxygen IsotopesPhotosystem I Protein ComplexFerricyanidesFlavinsCattleUbiquinoneMitochondriaChemistryProteinsChlorophyllChemical PhenomenaStereoisomerismFreeze FracturingLightSurface PropertiesCarbonMolybdenumProtein Structure, SecondaryHistocytochemistryMutationSpectrophotometry, UltravioletStaining and LabelingPlastocyaninFlavin-Adenine DinucleotideMolecular WeightRhodobacter sphaeroidesFerric CompoundsFlavin MononucleotideProtein Structure, TertiarySubstrate SpecificityNADPZincMacromolecular SubstancesNADAzurinDeuteriumChemistry, PhysicalGoldCytochrome b Group