Now, if we sum up all these steps, this is the net reaction that we get. So a single carbon dioxide molecule, a single free ammonium to water molecule. So one water molecule came from here and a second water molecule came from transforming the carbon dioxide into bicarbonate. We have three ATPs and an aspartape. So two ATPs are used here and one ATP is used here and we generate urea. Two ATPs, we have an amp, we have an orthophosphate, Pyrophosphate and fumarate.