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. 2013 Aug 6;8(8):e71420. doi: 10.1371/journal.pone.0071420

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© 2013 Stewart et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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a) Average intrastrand centroid distance (d_cc) for bases involved in cation-pi interactions (blue) and non-interacting bases (green). b) Average d_cc classified by base type with adenine (green), cytosine (blue), guanine (red), and thymine (purple). Error bars reflect 95% confidence intervals.