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. 2009 Nov 11;38(2):683–694. doi: 10.1093/nar/gkp956

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© The Author(s) 2009. 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/2.5/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 6. — (A) Top: solution structure of the cUUCGg-tetraloop. Bottom: Residues G1-G2 with bound water molecules found in 20 structures after water refinement. (B) Dynamics. Structure is coloured by the order parameter (S²) determined for the sugar (C1′H1′) and base (C6H6, C8H8) at 317 K and backbone (³¹P) at 310 K as published earlier (6,10,13), no data for the base and backbone of G1 (grey). Hydrogen bonds are indicated by solid lines. Dashed line indicates a potential hydrogen bond between the 2′-OH of U7 and N7 of G9 that is found in a third of calculated structures.