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. 2017 Aug 3;5:e3661. doi: 10.7717/peerj.3661

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©2017 Wang et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A) K2P, the Kimura-2- parameter distance; (B) Ka, the number of nonsynonymous substitutions per nonsynonymous site; (C) Ka/Ks. Ks, the number of synonymous substitutions per synonymous site.