And that deactivates it inhibits the activity of that enzyme. So let's suppose A is glucose and enzyme one is our hexokinase. So as hexokinase converts A into B, then binds onto enzyme A and that inactivates our enzyme. And the reason we want to regulate this is to basically make sure that our intermediate B, the glucose six phosphate, doesn't build up in concentration. So this is a method by which we basically make sure that we don't have too much of our intermediate in this reaction. So this is another diagram of this particular negative feedback inhibition mechanism.