bacteriorhodopsin


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bacteriorhodopsin

[bak‚tir·ē·ō·rō′däp·sən]
(biochemistry)
A purple substance in the cell membranes of halobacteria (found in extremely saline environments) during conditions of low oxygen, and consisting of the protein bacteriopsin and retinal, the same carotenoid found in the visual pigments of animals; in response to light, the purple membrane pumps protons out of the cell, providing the energy gradient for synthesis of adeniosine triphosphate.
References in periodicals archive ?
Bacteriorhodopsin is found in the intensely purple cell membrane of a bacterium called Halobacterium salinarium, which grows in salt marshes.
The membrane's purple color comes from a bacteriorhodopsin component called retinal, which is strongly bound to an amino acid inside the membrane channel.
The protein, called bacteriorhodopsin, converts light energy into electric energy quickly and efficiently.
Several groups have used bacteriorhodopsin as computer memory and as the light-sensitive element in artificial retinas.