And so this subunit here, the C subunit, will tend to rotate. And let's say the rotation is in a clockwise direction. And as this C subunit rotates, it causes the entire C structure to actually rotate with it. And so what happens once this H plus ion moves into this section? It binds until the aspartate residue forming the spartic acid, because of spartic acid is more hydrophobic. It wants to move into the core of the inner membrane of the mitochondria.