Generally, it is considered that a hyperbolic structured protein in specific media conditions is ready to do its task, it is active, but some spe deactivation, are responsible for the regulation of some metabolism pathways. Regulatory enzymes are commonly the first enzyme in a multienzyme system: the product of the reaction catalyzed by the first enzyme is the substrate of the second enzyme, so the cell can control the amount of resulting product by regulating the activity of the first enzyme of the pathway.