The other two methods by which we can regulate the rate of the citric acid cycle is by regulating the steps of the citric acid cycle itself. So, out of the eight steps of the citric acid cycle, two of these steps are oxidative decarboxylation steps. And both of these steps are controlled by allosteric enzymes. So step three and step four are the two oxidative decarboxylation steps. And the enzymes that regulate these two steps are allosteric enzymes which, as we'll see in just a moment, are actually regulated by specific types of allosteric effective molecules. So the citric acid cycle has two regulatory points that are used to control its rate.