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. Author manuscript; available in PMC: 2013 Jun 6.
Published in final edited form as: Chem Phys Lett. 2010 Jan 18;485(1-3):1–7. doi: 10.1016/j.cplett.2009.12.013

Fig. 1.

Fig. 1

Configuration from simulation [7] of potassium ion channels [12]. The inset shows a potassium ion (purple) in the S2 site, and eight (8) peptide backbone carbonyl groups that can ligate the ion.