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. 2012 Mar 27;7(3):e33852. doi: 10.1371/journal.pone.0033852

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Romiguier 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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Axes are in log scale. The orange color gradient represents the density of points. The two scales in purple and green show the median branch length (estimated by PAML) and the median number of sites for corresponding dN/dS values estimated by PAML. The 0 value includes estimations where dN is equal to 0 and estimations where dN and dS are both equal to 0 (0/0).