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