Particle aggregations at specialized sites in freeze-etched postsynaptic membranes.
D000818:Animals; D002415:Cats; D010856:Columbidae; D005613:Freeze Etching; D008566:Membranes; D008854:Microscopy, Electron; D051381:Rats; D013116:Spinal Cord / Q000166:cytology; D013569:Synapses / Q000166:cytology*; D013572:Synaptic Vesicles; D003336:Tectum Mesencephali / Q000166:cytology