So we take that polypeptide, we mix it with some type of molecule that cleaves those peptide bonds. And so for example, if you use a specific type of biological enzyme, for example, let's say we cleave it in this position and in this position. And so we produce fragments A, B and C. Now we can separate the fragments, for example, based on size by using SDS polyacrylamide, gel electrophoresis. And so what that does is it allows us to isolate these three different fragments and then we can use the Edmund degradation process on each one of these fragments individually. And so for example, for fragment one, once we carry out Edmund degradation, we know that for example, this is amino acid 12345 and six. Now we carry the same process out with fragment B.