Pigments, BiologicalRetinal PigmentsPigment Epithelium of EyeRetinaldehydeBile PigmentsPhycobilinsPhotoreceptors, MicrobialPhycocyaninPhotochemistryLightRhodopsinBiliverdineSpectrophotometryZinostatinBacteriorhodopsinsPhytochromeRod OpsinsSchiff BasesIsomerismTetrapyrrolesPhycoerythrinSpectrum AnalysisHalorhodospira halophilaHalobacteriumcis-trans-IsomerasesCarotenoidsChromatophoresChromogenic CompoundsSpectrophotometry, UltravioletSpectrometry, FluorescenceModels, BiologicalRetinoidsHalorhodopsinsEnediynesPhotochemical ProcessesEye ProteinsModels, MolecularFluorescenceColorPhotoreceptor CellsSpectrum Analysis, RamanMolecular Sequence DataLuminescent ProteinsMolecular StructurePigmentationMicrospectrophotometryProtein ConformationRhodopsins, MicrobialEnergy TransferKineticsRetinal Cone Photoreceptor CellsAmino Acid SequenceLipofuscinMelanophoresApoproteinsDeoxyribodipyrimidine Photo-LyaseCone OpsinsChromatography, High Pressure LiquidSensory RhodopsinsHalobacterium salinarumUrobilinXanthophyllsHydrogen-Ion ConcentrationDarknessModels, ChemicalOpsinsMolecular ConformationVision, OcularMelaninsFluorescent DyesMagnetic Resonance SpectroscopyMutationAbsorptionRhodophytaStructure-Activity RelationshipChromatiaceaePhycobiliproteinsCircular DichroismVitamin AQuantum TheoryCattleDark AdaptationPhotobiologyChlorophyllBiological ProductsGreen Fluorescent ProteinsBinding SitesRetinal Rod Photoreceptor CellsBacterial ProteinsStereoisomerismCyanobacteriaCrystallography, X-RayTemperatureProtonsPhotonsUltraviolet RaysProtein BindingChemistryAntibiotics, AntineoplasticAvena sativa