title: Heterogeneity of synaptic vesicles in the squid giant fibre system.
mesh_terms: D000818:Animals; D001369:Axons / Q000166:cytology*; D008854:Microscopy, Electron; D008974:Mollusca / Q000033:anatomy & histology*; D009413:Nerve Fibers, Myelinated; D009469:Neuromuscular Junction / Q000166:cytology; D009435:Synaptic Transmission; D013572:Synaptic Vesicles / Q000166:cytology*