We release the carbon dioxide and an H plus I and notice we attach the coenzyme A. So we form this very high energy bond known as the Thio ester bond. So this is essentially the same bond that we have here. So we have that shown here. And the key here is, because we form this thio ester bond, it will be very unstable, high in energy. And when we cleave this bond, it will release a certain amount of free energy that will allow us to actually carry out step five.