[A kinetic analysis of the action of a synaptosomal factor on Na, K-ATPase].

A synaptosomal factor stimulated by neurotransmitters activates the Na, K-ATPase system effecting the phosphorylating intermediates moving the Na, K-ATPase system in the mode of simultaneous transport of Na+ and K+. This conclusion has been made during the analysis of kinetics of the effect of MgATP complex, free Mg2+ ions and ATP on Na, K-ATPase activity. Unlike the EGTA, the factor under study does not change the number of essential activators (ions of Na+ and K+) of the Na, K-ATPase system at the equimolar ATP and Mg2+ correlation.