Well, the way that we solve the problem is if we have a long polypeptide, we divide that polypeptide, we cut up that polypeptide into very small fragments by using special types of molecules and biological enzymes. And so once we cut up the polypeptide into these fragments, we can then isolate and separate those fragments by using some type of purification technique, for example gel electrophoresis. And then we can use the Edmund degradation process on those individual small fragments. Because we just saw that if we have a small fragment, then we can use the Edmund degradation process, for example, to demonstrate that, let's calculate what the likelihood is of our sequence being correct. If our amino acid, if our protein or fragment, let's say is ten amino acids in length. So all we have to do is basically multiply.