title: Rhombic dodecahedral secretory granules in glucagon producing islet cells.
mesh_terms: D000818:Animals; D003460:Crystallization; D003530:Cyprinidae / Q000033:anatomy & histology*; D003594:Cytoplasmic Granules; D005934:Glucagon; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D010179:Pancreas / Q000166:cytology*
chemical_list: D005934:Glucagon