title: Ultrastructural search for homologues of pancreatic  -cells in the intestinal mucosa of the mollusc Buccinum undatum.
mesh_terms: D000818:Animals; D003594:Cytoplasmic Granules; D004847:Epithelial Cells; D007328:Insulin / Q000096:biosynthesis; D007413:Intestinal Mucosa / Q000166:cytology*; D007515:Islets of Langerhans / Q000166:cytology*; D008854:Microscopy, Electron; D012908:Snails / Q000033:anatomy & histology*
chemical_list: D007328:Insulin