title: Four pancreatic endocrine cells in the bullfrog (Rana catesbeiana).
mesh_terms: D000818:Animals; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005934:Glucagon / Q000032:analysis; D007515:Islets of Langerhans / Q000166:cytology* / Q000648:ultrastructure; D010187:Pancreatic Hormones / Q000032:analysis; D010191:Pancreatic Polypeptide / Q000032:analysis; D011863:Radioimmunoassay; D011892:Rana catesbeiana / Q000033:anatomy & histology*; D013004:Somatostatin / Q000032:analysis
chemical_list: D010187:Pancreatic Hormones; D013004:Somatostatin; D010191:Pancreatic Polypeptide; D005934:Glucagon