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. 2013 Aug 8;8(8):e71380. doi: 10.1371/journal.pone.0071380

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© 2013 Zhu et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(a), G-quartet base-triads. All four bases have similar Z-axis but distinct X-axis and Y-axis. (b), Calculating for Z by rotating the Z by /2 about the rt axis, and is the angle between two Z-axes Z and Z.

Inline graphic — (a), G-quartet base-triads. All four bases have similar Z-axis but distinct X-axis and Y-axis. (b), Calculating for Z by rotating the Z by /2 about the rt axis, and is the angle between two Z-axes Z and Z.