Cationic binding at the node of Ranvier.
D001369:Axons / Q000032:analysis; D001665:Binding Sites; D009186:Myelin Sheath / Q000378:metabolism*; D011188:Potassium / Q000032:analysis; D011901:Ranvier's Nodes / Q000378:metabolism; D012964:Sodium / Q000032:analysis; D013194:Staining and Labeling
D012964:Sodium; D011188:Potassium