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Figure 4
(a) Side view and (b) top view of potassium channel from Streptomyces lividans (PDB code 1bl8 ). The potassium ions and a water molecule are shown as spheres. (c) Distances and angles between the centres of mass of the four subunits. (d) Schematic representation of the molecule, exhibiting fourfold symmetry.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
Volume 65| Part 1| December 2009| Pages 1-10
doi:10.1107/S0907444908029867
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