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. 2008 Jun;131(6):523–529. doi: 10.1085/jgp.200809991

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© 2008 Lipkind and Fozzard

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Figure 2. — A steady-state configuration for AEKA + K⁺ (yellow ball). During MD simulation the K⁺ ion breaks the hydrogen bond between glutamate(II) and lysine(III), but remains midway between glutamate(II) and lysine(III), making K+ binding less favorable.