Peptides classification Peptides--Short polymers of amino acids Each unit is called a residue 2 residues-dipeptide 3 residues-tripeptide 12-20 residues-oligopeptide many-polypeptidePeptides Classification • Peptides --Short polymers of amino acids • Each unit is called a residue • 2 residues - dipeptide • 3 residues - tripeptide • 12-20 residues - oligopeptide • many - polypeptide