All of the features are related to peptide bond except:

Phosphodiesters are especially important as the phosphodiester bonds compose the backbone of DNA. In a polypeptide or a protein, amino acids are linked by a peptide bond which is formed when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2) group of the next amino acid with the elimination of a water moiety (the process is called dehydration).