Microtubules and membrane specializations.
D000818:Animals; D000831:Animals, Newborn; D001921:Brain / Q000648:ultrastructure*; D002462:Cell Membrane / Q000648:ultrastructure*; D008870:Microtubules / Q000648:ultrastructure*; D051381:Rats; D013570:Synaptic Membranes / Q000648:ultrastructure