title: Salt and pH-dependent changes of the purple membrane absorption spectrum.
mesh_terms: D001436:Bacteriorhodopsins / Q000378:metabolism*; D002338:Carotenoids / Q000378:metabolism*; D006217:Halobacterium; D006863:Hydrogen-Ion Concentration; D009994:Osmolar Concentration; D013053:Spectrophotometry
chemical_list: D002338:Carotenoids; D001436:Bacteriorhodopsins