1BL8:
reference: The structure of the potassium channel: molecular basis of K+ conduction and selectivity., Doyle DA, Morais Cabral J, Pfuetzner RA, Kuo A, Gulbis JM, Cohen SL, Chait BT, MacKinnon R, Science 1998 Apr 3;280(5360):69-77. PMID: 9525859

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