BacteriochlorophyllsRhodobacter sphaeroidesPheophytinsChloroflexusPhotosynthetic Reaction Center Complex ProteinsLight-Harvesting Protein ComplexesChlorobiBacterial ChromatophoresChlorophyllPhotosynthesisSpectrophotometryBromcresol PurpleBacteriorhodopsinsHalobacteriumHalobacterium salinarumChromatiaceae