4 Na(+)(in) + ATP + H2O = 4 Na(+)(out) + ADP + phosphate + H(+)
4 na(+)(in) + atp + h2o = 4 na(+)(out) + adp + phosphate + h(+)
"Na(+)-transporting two-sector ATPase"
"na(+)-transporting two-sector atpase"