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. 2014 May 6;9(5):e92475. doi: 10.1371/journal.pone.0092475

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© 2014 Biton 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 schematic drawing of the two adjacent base pairs forming the -th step of DNA. Each nucleotide base in the -th base pair is covalently bonded at its darkened corner to one of the two sugar phosphate backbone chains. The direction of that oriented chain is indicated by a light-face arrow; the chain itself is not shown. The gray-shaded long edges are in the minor groove of the DNA.

Inline graphic — A schematic drawing of the two adjacent base pairs forming the -th step of DNA. Each nucleotide base in the -th base pair is covalently bonded at its darkened corner to one of the two sugar phosphate backbone chains. The direction of that oriented chain is indicated by a light-face arrow; the chain itself is not shown. The gray-shaded long edges are in the minor groove of the DNA.