nitrate(out) + 2 Na(+)(out) = nitrate(in) + 2 Na(+)(in)
nitrate(out) + 2 na(+)(out) = nitrate(in) + 2 na(+)(in)
nitrate(out) + 2 Na(+)(out) = nitrate(in) + 2 Na(+)(in)
nitrate(out) + 2 na(+)(out) = nitrate(in) + 2 na(+)(in)