Figure 4.

The promoter evolution rates of de novo genes, duplicated new genes, orthologous genes, and all the other genes in the S. cerevisiae genome. Comparisons of evolution rates in the promoters of de novo genes, duplicated new genes, orthologous genes, and all the other genes in the S. cerevisiae genome. The dashed line indicates the evolution rate of four-fold degenerate sites. The significance tests were conducted by one-sided Wilcoxon test (*: p-value < 0.01; **: p-value < 0.001 compared to de novo genes)

Tsai et al. BMC Genomics 2012 13:717   doi:10.1186/1471-2164-13-717
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