1EEG:
reference: A dimeric DNA interface stabilized by stacked A.(G.G.G.G).A hexads and coordinated monovalent cations., Kettani A, Gorin A, Majumdar A, Hermann T, Skripkin E, Zhao H, Jones R, Patel DJ, J Mol Biol 2000 Mar 31;297(3):627-44. PMID: 10731417

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