So another rotation of 120 degrees in the counterclockwise direction, which is not shown in this diagram, will lock the reactants, the ADP and the pi in this state and they will not be able to leave this structure. And so this mechanism is what we call the binding change mechanism. Now, what we're going to focus on in the next lecture is how the third step actually takes place. So we actually didn't discuss why the ATP molecule is actually able to leave because what ultimately allows that ATP molecule to actually leave is the fact that this structure is in the open state. And what creates that open state is the rotation of that gamma unit. And the next lecture we're going to focus on what causes that gamma unit to actually rotate.