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We report that Triton X-100 can alter the temporal sequence of the light-induced proton uptake and release of archaerhodopsin 4 (AR4), a proton pumping protein in a species of Halobacteria from a Tibetan salt lake. Under physiological conditions, AR4 isolated from the bacterium exhibits a reversed temporal order of proton release and uptake compared to what is observed for bacteriorhodopsin (BR)....
A strain of extremely salt-loving halobacteria Halobacterium species xz515 from a salt lake in Tibet was isolated. SDS-polyacrylamide gel electrophoresis shows that there is only one protein on claret membrane, which is the same membrane fraction as purple membrane from Halobacterium salinarum, with a molecular weight close to bacteriorhodopsin (br). The purified retinal containing protein from xz515...
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