So we have residue one, residue two, and so forth. So notice we have five amino acids, but only four peptide bonds. And normally, if we have, let's say, N number of amino acids, we always have N minus one number of peptide bonds. Now, under normal physiological conditions, at a neutral PH, this polypeptide will always have polarity. And what that means is on one end of the polypeptide chain, the alpha amino group will contain a full positive charge, and at the other end, the alpha carboxyl group will contain a full negative charge. And so we have polarity as a result of these two different charges.