NA/K pump

1

binding of the cytoplasmic Na to the protein stimulates phosphorlytion by ATP

2

phosphorlyation causes the protein to change its conformation

3

conformational change expels Na to the outside and extracellular K binds

4

K binding triggers release of phosphate group

5

loss of phosphate restores original conformation

6

k is released and na sites are receptive again; the cycle repeats