Two pancreatic peptides, somatostatin-28 and peptide YY, have been isolated from the Brockmann bodies of the teleost fish Cottus scorpius (daddy sculpin). Following purification by reverse-phase HPLC, each peptide was sequenced completely through to the carboxyl-terminus by gas-phase Edman degradation. Somatostatin-28 was the major form of somatostatin detected and is similar to the gene II product from angler-fish. Peptide YY (36 amino acids) more closely resembles porcine neuropeptide YY and intestinal peptide YY than it does the pancreatic polypeptides.
