2E4I:
reference: Structure of a human telomeric DNA sequence stabilized by 8-bromoguanosine substitutions, as determined by NMR in a K+ solution., Matsugami A, Xu Y, Noguchi Y, Sugiyama H, Katahira M, FEBS J. 2007 Jul;274(14):3545-56. Epub 2007 Jun 11. PMID: 17561958

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