Figure 3.
Frequency distribution of Ka/Ks ratios for pairwise exon-level comparisons between D. melanogaster and either D. erecta, D. pseudoobscura, D. willistoni, or D. littoralis. Ka/Ks ratios were estimated using the codeml program of PAML 3.12 using runmode = -2.
Bergman et al. Genome Biology 2002 3:research0086.1 doi:10.1186/gb-2002-3-12-research0086