Intestinal AbsorptionX-Ray Absorption SpectroscopyAbsorptionSpectrophotometry, AtomicSpectrum AnalysisMagnetic Resonance SpectroscopyX-RaysSpectrometry, X-Ray EmissionSpectrophotometrySpectrophotometry, InfraredSpectrophotometry, UltravioletIronZincElectron Spin Resonance SpectroscopySpectrum Analysis, RamanCopperSulfurSpectrometry, FluorescenceOxidation-ReductionSpectroscopy, Near-InfraredKineticsWaterCircular DichroismSkin AbsorptionHemeBiological AvailabilityElectron Probe MicroanalysisHydrogen-Ion ConcentrationProtein ConformationModels, MolecularElectronsNickelManganeseMolecular StructureSpectroscopy, MossbauerPhotosynthetic Reaction Center Complex ProteinsMetalloproteinsBinding SitesOrganometallic CompoundsFerrous CompoundsPhotochemistryLightManganese CompoundsGamma RaysQuantum TheoryAluminumTemperatureSolutionsJejunumSynchrotronsFourier AnalysisModels, ChemicalRadiographyPhotolysisTime FactorsOxygenGraphiteCarbon MonoxideEnergy TransferLasers, SemiconductorX-Ray DiffractionMetalsProtein BindingSpectroscopy, Fourier Transform InfraredSelenium CompoundsGoldAdsorptionProtonsLasersLigandsBacteriorhodopsinsPhotosystem I Protein ComplexPlastocyaninThermodynamicsMolecular ConformationCobaltOxidesMolybdenumPhotosystem II Protein ComplexFerric CompoundsMolecular Sequence DataProtein Structure, SecondaryMyoglobinIntestine, SmallAmino Acid SequenceMetal NanoparticlesOxyhemoglobinsCattleElectron TransportBiophysicsRetinaldehydeAirLeadRhodobacter sphaeroidesAdministration, OralPhytic AcidCadmium CompoundsCarotenoidsChromatography, High Pressure LiquidScattering, Radiation