Figure 4

Ka/Ks values for pairwise comparisons of the putative S-RNase sequences from several Antirrhinum and Misopates species. Ka and Ks values are the numbers of nonsynonymous and synonymous substitutions per site between sequences of different groups, and the thick line shows Ka/Ks = 1. The filled symbols show the results using the entire sequence region analysed, and the open symbols are excluding the conserved regions C1, C2 and C3.