And now we have a positive charge that is essentially delocalized among these three nitrogen atoms here. So once we form this, we also actually form this Pyrophosphate. And the Pyrophosphate, because it's unstable, will actually hydrolyze. And so what that means is we not only use one ATP in this step, but we actually use two equivalent ATP molecules because the hydrolysis of Pyrophosphate basically is equivalent to hydrolyzing a single ATP molecule. And so here we actually use two and not one ATP molecules. So once we form Argine succinate, that is then used in step four.