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. 2008 Mar 16;36(8):2654–2666. doi: 10.1093/nar/gkn112

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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 3. — The bacterial A site in the ‘off’ state. (a) Secondary structure and stereoview. (b–h) Atomic details of each base pair of the A site. Three universally conserved adenine residues, A1408, A1492 and A1493, are colored in orange, blue and red, respectively. Two nucleotides different from those in the mitochondrial A site, U1490 and G1491, are colored in cyan and green, respectively. The hydrogen bonds are represented by black dashed lines.