So once again, the bond that we're about to break or that we want to break is this bond. Now, the difficult question is, how do we break this specific peptide bond and at the same time not break any other of these peptide bonds. So we want to create a procedure in which we only somehow break this peptide bond here between this first and second amino acid. But at the same time, we want to keep the remaining peptide bonds intact. Well, the way that we can do it is we can simply take this molecule here and place it under mildly acidic conditions. And if we place it under mildly acidic conditions, what happens is this peptide bond will hydrolyze, it will break, it will rearrange.