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| Description: The amide bond formation leaves an amino group available on one end of the tetrapeptide and a carboxylate group on the other, called the N-terminus and C-terminus, respectively. The portion of each amino acid remaining in the chain is called an amino acid residue. When specifying an amino acid residue in a peptide, the suffix –yl may be used (e.g., glycinyl, alanyl). Picture Stats: Views: 254 Filesize: 142.16kB Height: 500 Width: 773 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=33914 |