title: The ultrastructure of the "difference factor" in the myelin.
mesh_terms: D000818:Animals; D005615:Freezing; D006652:Histological Techniques; D008566:Membranes; D051379:Mice; D008854:Microscopy, Electron; D009186:Myelin Sheath; D012584:Sciatic Nerve / Q000166:cytology*