title: Opioid polypeptides in guinea pig pancreas.
abstract: Extracts from guinea pig pancreas were found to contain high molecular weight enkephalin-containing polypeptides as well as free [Met]enkephalin and [Leu]enkephalin and the hexa-, hepta-, and octapeptides derived from proenkephalin. Within the limits of sensitivity of our assay (10 fmol/g of tissue), beta-endorphin and beta-lipotropin were undetectable.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D004723:Endorphins / Q000032:analysis*; D006168:Guinea Pigs; D010179:Pancreas / Q000032:analysis*; D011498:Protein Precursors / Q000032:analysis; D011863:Radioimmunoassay; D008083:beta-Lipotropin / Q000032:analysis
chemical_list: D004723:Endorphins; D011498:Protein Precursors; D008083:beta-Lipotropin