And so this can increase the specificity of the interaction between the active side of the enzyme and that substrate molecule. Now number three is the protein kinases are actually able to easily adjust the rates, the kinetics of this reaction. So depending on the physiological needs of the cells, this reaction can take place very, very quickly in a matter of seconds or it can take place over a very long period of time. And the rate at which it actually the rate at which it takes place and the rate at which the protein kinases catalyze the reactions basically depends on the conditions found inside our cells. If we have to undergo this process, the protein kinases can basically allow the process to take place very quickly. But if we don't want to carry out the process, these protein kinases can easily adjust the kinetics and slow down the speed at which this reaction actually takes place.