Abstract
The proteoliposomes prepared from purified proline carrier protein isolated from membrane vesicles of Mycobacterium phlei exhibited an uptake of proline, which was dependent upon a proton gradient generated across the lipid bilayer. Although a proton gradient was generated by the reduction of the entrapped ferricyanide by ascorbate oxidation with benzoquinone serving as a lipid soluble hydrogen carrier, transport of proline was dependent on the addition of sodium ion. The movement of sodium and proline across the artificial membrane resulted in a simultaneous collapse of the proton gradient.
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