X-Ray Absorption SpectroscopyAbsorptionIntestinal AbsorptionSpectrum AnalysisSpectrophotometry, AtomicMagnetic Resonance SpectroscopyX-RaysSpectrometry, X-Ray EmissionSpectrophotometry, InfraredSpectrophotometryMicroscopyMicroscopy, Electron, ScanningSpectrophotometry, UltravioletMicroscopy, ElectronSpectrum Analysis, RamanElectron Spin Resonance SpectroscopyIronZincSulfurCopperSpectrometry, FluorescenceSpectroscopy, Near-InfraredMicroscopy, ConfocalOxidation-ReductionCircular DichroismKineticsWaterElectron Probe MicroanalysisMicroscopy, FluorescenceModels, MolecularProtein ConformationMicroscopy, Atomic ForceHemeElectronsNickelHydrogen-Ion ConcentrationSpectroscopy, MossbauerGamma RaysBinding SitesMolecular StructureOrganometallic CompoundsManganeseManganese CompoundsPhotosynthetic Reaction Center Complex ProteinsMetalloproteinsTemperatureSynchrotronsQuantum TheoryRadiographyLightMicroscopy, Electron, TransmissionSolutionsFourier AnalysisPhotochemistryAluminumModels, ChemicalX-Ray DiffractionTime FactorsProtein BindingGoldLasers, SemiconductorGraphitePhotolysisOxygenFerrous CompoundsLasersAdsorptionMetalsSpectroscopy, Fourier Transform InfraredMolecular Sequence DataCarbon MonoxideEnergy TransferSelenium CompoundsLigandsProtonsMolecular ConformationAmino Acid SequenceProtein Structure, SecondaryOxidesPlastocyaninThermodynamicsMetal NanoparticlesPhotosystem I Protein ComplexSurface PropertiesCobaltSkin AbsorptionPhotosystem II Protein ComplexMolybdenumBacteriorhodopsinsMicroscopy, ImmunoelectronBiophysicsCattleMyoglobinAirFerric CompoundsOxyhemoglobinsBiological AvailabilityScattering, RadiationNuclear Magnetic Resonance, BiomolecularElectron Transport