Microscopy, ElectronElectronsElectron TransportMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyMicroscopy, Electron, Scanning TransmissionOxidation-ReductionElectron Probe MicroanalysisElectron Transport Complex IVElectron Transport Complex IIIModels, MolecularAlgorithmsKineticsMolecular Sequence DataCryoelectron MicroscopyProtein ConformationModels, BiologicalAmino Acid SequencePhotosynthesisOxidoreductasesElectron Transport Chain Complex ProteinsMicroscopy, ImmunoelectronSoftwareSpectrophotometryComputer SimulationElectron Transport Complex ICell MembraneTime FactorsSpin LabelsCytochrome c GroupCytochromesPhotosynthetic Reaction Center Complex ProteinsBacterial ProteinsOxygenModels, ChemicalEscherichia coliStaining and LabelingLightMitochondriaFerredoxinsPhotosystem I Protein ComplexBinding SitesFerricyanidesMutationProtein BindingFreeze FracturingHistocytochemistryProteinsHydrogen-Ion ConcentrationUbiquinoneSpectrum AnalysisTemperatureElectrochemistryHemeCattleComputational BiologyHydrogenFree RadicalsX-Ray DiffractionGoldSurface PropertiesChlorophyllCrystallography, X-RayIron-Sulfur ProteinsBase SequenceImage Processing, Computer-AssistedPhotosystem II Protein ComplexMolecular StructureRabbitsReproducibility of ResultsRhodobacter sphaeroidesWaterProtonsFerric CompoundsImaging, Three-DimensionalHistological TechniquesSpectroscopy, Electron Energy-LossPlastocyaninMicroscopy, Energy-Filtering Transmission ElectronFlavinsModels, TheoreticalThermodynamicsModels, StatisticalProtein Structure, TertiaryMicroscopy, FluorescenceAntimycin ACell LineShewanellaElectron Transport Complex IICytoplasmSequence Analysis, DNAOrganoidsNegative StainingPhylogenyParticle SizeElectron-Transferring FlavoproteinsGeobacterNADPFlavin-Adenine Dinucleotide