So, in this example, we have some type of polypeptide. And when we take the polypeptide and we expose it to Trypsin, we get these two fragments. Now we take that same polypeptide in its full polypeptide form, and we now expose it to chimetrypsid, and we get three fragments that look like this. So what we basically want to do is so assuming that we actually use the Edmund degradation process on each one of these fragments, so we know exactly what the sequence is. Now, what we want to do is we want to piece these fragments together. We want to find what the correct order is of these fragments by using these overlapping regions.