And what that means is that inhibitor can bind onto that enzyme regardless of whether or not that substrate is actually bound onto that active site. And so this is the equation that describes this process. So in the absence of the inhibitor, the substrate is going to bind to the active site of the enzyme, forming the enzyme substrate complex, and that will transform the substrate of the product, and then the product will be released. Now, in the presence of the inhibitor, that inhibitor can either bind onto that individual enzyme forming that enzyme inhibitor complex, or it can bind onto the enzyme substrate complex to form that particular enzyme substrate inhibitor complex. And notice that if we form the enzyme inhibitor complex, that doesn't change the likelihood that the substrate is going to bind to that enzyme. And that is important in part three, as we'll see in just a moment.