Answer
$\text{The shape of the pump protein changes when Na$^{+}$-K$^{+}$ pump is phosphorylated. When K$^{+}$ binds to the pump protein, an inorganic phosphate group is released.}$
Work Step by Step
$\text{The shape of the pump protein changes when Na$^{+}$-K$^{+}$ pump is phosphorylated. When K$^{+}$ binds to the pump protein, an inorganic phosphate group is released.}$
