And once bound, they will not dissociate very easily. Now, we can subdivide subcategorize reversible inhibition into three different types, and actually there are four, but in this lecture we're going to focus on three. So we have competitive inhibition, we have uncompetitive inhibition, and we have non competitive inhibition. We also have something called mixed inhibition, but we're not going to focus on that in this lecture. So let's begin with competitive inhibition. So what exactly do we mean by competitive inhibition?