Now, another important point about the beginning of the reaction is right at the beginning of the reaction we have not yet formed a large amount of products. So right at the beginning what happens is we have that enzyme that binds onto the substrate and this takes place relatively quickly. And so equilibrium is established here between these and this complex quickly because this takes place very quickly. But the enzyme basically converts that substrate into the product relatively slowly. And so at least initially at the beginning, we don't actually form a lot of the product. So at a time of t approximately equal to zero, what that means is because we don't have a lot of product form, this reaction will take place at a very very low rate.