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. Author manuscript; available in PMC: 2009 Oct 2.
Published in final edited form as: Gene. 2007 Sep 20;404(1-2):117–125. doi: 10.1016/j.gene.2007.09.013

Figure 4.

Figure 4

Median ratio of nonsynonymous nucleotide diversity (πN) to synonymous nucleotide diversity (πS) in virus sequence datasets classified by virus and host characteristics. Vert. = vertebrate host. NE = non-exposed protein; E = exposed protein. Kruskal-Wallis test for overall difference among medians: P < 0.001. Individual comparisons to E for RNA (Vert., vector): * P < 0.05; ** P < 0.01; *** P < 0.001. Numbers of datasets were as follows: DNA (Vert., no vector): 39 NE, 29 E; RNA (Vert., no vector): 57 NE, 34 E; RNA (Vert., vector) 9 NE, 15 E; RNA (Plant) 13 NE, 18 E.