Well actually one thing that is not shown in a diagram is the fact that these peptide bonds actually are resonance stabilized. So what exactly do we mean by that? Well, let's suppose we look at the following diagram and what this diagram basically describes is, well let's suppose that we take the following polypeptide. And let's suppose we cut the polypeptide right here. So we essentially cut it here. And then so this carbon is this carbon here.