HalobacteriumHalobacterium salinarumBacteriorhodopsinsHalorhodopsinsCarotenoidsPyruvate SynthaseLightRetinaldehydePhotochemistryArchaeal ProteinsSensory RhodopsinsOrganotin CompoundsPhotophosphorylationGenes, BacterialSpectrophotometryArchaeaHydrogen-Ion ConcentrationHalobacterialesSpectrum AnalysisSodium ChlorideKineticsBase SequenceDicyclohexylcarbodiimideMolecular Sequence DataDNA, BacterialGene Expression Regulation, ArchaealDarknessKetone OxidoreductasesPurple MembraneAmino Acid SequenceSequence Homology, Nucleic AcidMolecular WeightCell MembraneRestriction MappingPlasmidsGenes, ArchaealBacterial ProteinsDNA Transposable ElementsProtonsAmino AcidsCloning, MolecularNucleic Acid HybridizationTemperatureHalobacteriaceaeBacteriaRNA, BacterialMembrane ProteinsTranscription, GeneticMutationElectrophoresis, Polyacrylamide GelGenome, ArchaealEscherichia coliProtein Conformation