The structure of a d(gcGAACgc) duplex containing two consecutive bulged A residues in both strands suggests a molecular switch
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In previous studies, it was reported that DNA fragments with the sequence d(gcGXYAgc) (where X = A or G and Y = A, T or G) form a stable base-intercalated duplex (Bi-duplex) in which the central X and Y residues are not involved in any base-pair interactions b... ...
