title: Demonstration of electron-dense material within "empty" synaptic vesicles in the CNS of rat.
mesh_terms: D000818:Animals; D001921:Brain / Q000648:ultrastructure*; D051381:Rats; D013572:Synaptic Vesicles / Q000648:ultrastructure*; D014357:Trypsin
chemical_list: D014357:Trypsin