And once we transform the quaternary structure from the tense to the relaxed state, the blue curve is the curve that basically begins to describe that quarterinary behavior. And so according to this blue curve at the same substrate concentration, we see that the rate of activity is much higher. So the green curve describes the Michael's mental curve for the 10th state, the blue curve describes for the relaxed state. And if we combine these two curves we obtain the actual black curve that describes the S shaped, the Sigmoidal curve for this allosteric enzyme. And this is what we know as the concerted model. We have the all or nothing behavior in which we either exist in the T state in which the enzyme is inactivated or the art state in which the enzyme is fully active and basically carries out that particular catalytic reaction.