4 Na(+)(in) + ATP + H2O => 4 Na(+)(out) + ADP + phosphate + H(+)
4 na(+)(in) + atp + h2o => 4 na(+)(out) + adp + phosphate + h(+)
4 Na(+)(in) + ATP + H2O => 4 Na(+)(out) + ADP + phosphate + H(+)
4 na(+)(in) + atp + h2o => 4 na(+)(out) + adp + phosphate + h(+)