sodium transport of erythrocytes from normotensive and essential hypertensive subjects was evaluated by determining ouabain-sensitive and ouabain-insensitive sodium efflux rates , na+-li+ countertransport rates , li+-k+ cotransport rate constants ( lithium replacing sodium ) , intracellular sodium concentrations , and the number of na+ , k+-adenosine triphosphatase ( atpase ) sites per erythrocyte .
C0001479
na
C0001473
atpase