Electron TransportElectronsPhotochemical ProcessesPulse RadiolysisLightOxidation-ReductionKineticsSpectrophotometryCytochrome c GroupModels, MolecularEnergy TransferModels, ChemicalCopperPhotosynthetic Reaction Center Complex ProteinsQuantum TheoryPhotochemistryProtonsRhodobacter sphaeroidesLight-Harvesting Protein ComplexesSpectrometry, FluorescenceBacteriochlorophyllsMicroscopy, ElectronPhotosynthesisElectrochemistryPhotosystem II Protein ComplexThermodynamicsElectron Spin Resonance SpectroscopyElectron Transport Complex IVRhodopseudomonasChlorophyllBiophysicsBiophysical PhenomenaSpectrum AnalysisMicroscopy, Electron, ScanningPheophytinsPhotosystem I Protein ComplexRutheniumElectron Transport Complex IIIElectron-Transferring FlavoproteinsProtein ConformationTemperatureHydrogen BondingWaterPlastocyaninAzurinHydrogen-Ion ConcentrationBacterial ProteinsOxygenHemeFerredoxinsFree RadicalsPhotolysisSpectrophotometry, InfraredFerricyanidesFlavinsMolecular Sequence DataFluorescenceCytochromesTime FactorsSpinacia oleraceaMolecular StructureAmino Acid SequencePhotoreceptors, MicrobialIron-Sulfur ProteinsUbiquinoneProtein BindingFlavoproteinsHalorhodospira halophilaLuminescenceGene Transfer TechniquesCytochromes fFlavin MononucleotideFlavin-Adenine DinucleotideCytochrome b GroupOxidoreductasesQuinonesFerredoxin-NADP ReductaseEscherichia coliCyanobacteriaParacoccus denitrificansSpectrophotometry, UltravioletBinding Sites2-NaphthylamineMicroscopy, Electron, TransmissionAbsorptionCytochromes c2Crystallography, X-RayLasersTryptophanNADPH-Ferrihemoprotein ReductaseFluorescent DyesFlavodoxinElectrodesSpectrum Analysis, RamanCytochromes c1Molecular ConformationBioelectric Energy SourcesModels, BiologicalGene Transfer, HorizontalEmbryo Transfer