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. 2009 Jun 1;48(24):5738–5752. doi: 10.1021/bi8019405

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Copyright © 2009 American Chemical Society

This is an open-access article distributed under the ACS AuthorChoice Terms & Conditions. Any use of this article, must conform to the terms of that license which are available at http://pubs.acs.org.

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Base stacking and base pairing involving CA. Base pairs shown in gray lines are closer to the viewer. The Watson−Crick CG, wobble CA⁺ (the proton from protonation is not shown), and sheared GA pairs shown in a and b are taken from the segment of the NMR structure of the substrate loop of VS ribozyme (9). The Watson−Crick CG, A N1−C amino single hydrogen-bond AC pair, and sheared GA shown in c and d are taken from segment of the NMR structure of loop B of a hairpin ribozyme (37). The stacking figures are generated by the 3DNA program (75).

Inline graphic — Base stacking and base pairing involving CA. Base pairs shown in gray lines are closer to the viewer. The Watson−Crick CG, wobble CA⁺ (the proton from protonation is not shown), and sheared GA pairs shown in a and b are taken from the segment of the NMR structure of the substrate loop of VS ribozyme (9). The Watson−Crick CG, A N1−C amino single hydrogen-bond AC pair, and sheared GA shown in c and d are taken from segment of the NMR structure of loop B of a hairpin ribozyme (37). The stacking figures are generated by the 3DNA program (75).