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. 2007 Oct 25;36(Database issue):D800–D808. doi: 10.1093/nar/gkm764

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© 2007 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-com

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Figure 4. — Likelihood test data and results for IRX3. (A) Branch tests for selection, Model H (test model) and Model Hnull (neutral model). The variables in the table are as follows: t, the length of the branch; s and n, the number of synonymous and non-synonymous sites, respectively; dN/dS, the ratio of the rate of non-synonymous and synonymous substitution for the branch; dN and dS, the rate of synonymous and non-synonymous substitution on the branch; S*dS and N*dN, a rough estimate of the absolute number of synonymous and non-synonymous substitutions. (B) Branch + site tests for selection, including the proportion of codons in each site class for the background and foreground (human) lineage, and the posterior probability that a given site is positively selected.