The Na+-K+ ATPase is also known as the Na+-K+ pump. It is responsible for maintaining the high extracellular sodium ion concentration and the high intracellular potassium ion concentration. What happens immediately after the pump hydrolyzes ATP?

(a) Na+ is bound
(b) ADP is bound
(c) the pump is phosphorylated
(d) the pump changes conformation


(c) The phosphorylation of the pump causes the conformational change, and it occurs after the binding of Na+.

Biology & Microbiology

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