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. 2012 Sep 8;40(21):11126–11138. doi: 10.1093/nar/gks799

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© The Author(s) 2012. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — Computational modelling of N9-methylated bases. Calculated using Spartan 08 v1.2.0 at AM1 level: (a) Watson–Crick G·C base pair (−701 kJ mol⁻¹) (b) syn-8-nitroG·G (−354 kJ mol⁻¹) (c) protonated syn-8-nitroG·A base pair (−166 kJ mol⁻¹).