title: Studies on polypeptides.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle; D010179:Pancreas / Q000201:enzymology; D010446:Peptide Fragments / Q000032:analysis; D010455:Peptides / Q000138:chemical synthesis*; D011485:Protein Binding; D051381:Rats; D012260:Ribonucleases / Q000032:analysis / Q000138:chemical synthesis*
chemical_list: D010446:Peptide Fragments; D010455:Peptides; D012260:Ribonucleases