title: Determination of the retinal/protein molar ratios for the purple membranes of Halobacterium halobium and Halobacterium cutirubrum.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis*; D001436:Bacteriorhodopsins; D002338:Carotenoids; D006217:Halobacterium / Q000032:analysis*; D012172:Retinaldehyde / Q000032:analysis*; D013045:Species Specificity; D013053:Spectrophotometry; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D001426:Bacterial Proteins; D014801:Vitamin A; D002338:Carotenoids; D001436:Bacteriorhodopsins; D012172:Retinaldehyde