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. 2008 Jul 21;36(14):4778–4787. doi: 10.1093/nar/gkn448

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© 2008 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 9. — Interaction of Arg35 of subunits A and D with conserved TG (=CA) sequences. Inter-strand stacking of purines A34 and G3, allows T2 to stack with the planar guanidinium group of Arg35, which also hydrogen-bonds to G3 in the major groove.