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Distance between K+ ions in potassium channel

Range	~7 Å
Organism	Unspecified
Reference	Yellen G. The voltage-gated potassium channels and their relatives. Nature. 2002 Sep 5 419(6902):35-42. p.37 right column 2nd paragraphPubMed ID12214225
Comments	p.37 right column 2nd paragraph:"Finally, a long-known feature of potassium channels is that K+ ions pass through in single file, with simultaneous occupancy by multiple ions [refs 5, 10, 11, 12]. The mutual electrostatic repulsion between adjacent K+ ions (spaced about 7 Å apart) destabilizes ions in the pore, permitting the other favourable interactions to produce ion selectivity without producing overly tight binding that would impair rapid permeation."
Entered by	Uri M
ID	111646