[Dependence of [14C] nicotinate and [35S] lipoate transport to erythrocytes on their Mg2+, Na+, K+-ATPase activity].

Nicotinic acid added to the incubation medium stimulates ATPase activity in erythrocytes and their membranes. Simultaneously the ouabain-sensitive ATPase activity is activated. The mentioned effect is not observed when lipoic acid is added to the medium. Accumulation of [14C]nicotinate and [35S]lipoate in biostructures occurs more intensely under conditions optimal for the Mg2+, Na+, K+-ATPase activity. In experiments with "traces" of erythrocytes it is shown that the gradient of Na+ and K+ favours to the transport of [35S] lipoate.