ElectronsLasersMicroscopy, ElectronElectron TransportMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyMicroscopy, Electron, Scanning TransmissionOxidation-ReductionFree RadicalsElectron Probe MicroanalysisElectron Transport Complex IVElectron Transport Complex IIIKineticsModels, MolecularCryoelectron MicroscopyElectron Transport Chain Complex ProteinsMolecular Sequence DataPhotosynthesisMicroscopy, ImmunoelectronOxidoreductasesCytochrome c GroupElectron Transport Complex ISpectrophotometryCell MembraneSpin LabelsCytochromesPhotosynthetic Reaction Center Complex ProteinsOxygenMitochondriaFerredoxinsProtein ConformationPhotosystem I Protein ComplexHydrogen-Ion ConcentrationFerricyanidesFreeze FracturingUbiquinoneAmino Acid SequenceHistocytochemistryModels, ChemicalEscherichia coliBacterial ProteinsLightTime FactorsHemeTemperatureHydrogenStaining and LabelingElectrochemistryChlorophyllCattleSpectrum AnalysisIron-Sulfur ProteinsThermodynamicsBinding SitesX-Ray DiffractionProtein BindingRabbitsPhotosystem II Protein ComplexRhodobacter sphaeroidesProtonsFlavinsMutationFree Radical ScavengersPlastocyaninSpectroscopy, Electron Energy-LossAntimycin AOrganoidsMicroscopy, Energy-Filtering Transmission Electron