title: Freeze-fracture heterogeneity of the axolemma of premyelinated fibers in the CNS.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure*; D005614:Freeze Fracturing; D008855:Microscopy, Electron, Scanning; D009900:Optic Nerve / Q000254:growth & development* / Q000648:ultrastructure; D051381:Rats