Figure 3
From: Accelerated gene evolution and subfunctionalization in the pseudotetraploid frog Xenopus laevis
Normalized peptide to nucleotide evolutionary rates show an accelerated divergence of duplicated X. laevis peptides. The chart shows the ratio of peptide evolution (P-distance) to synonymous transversion rates (4 DTv), normalized by the human-mouse P-distance/4 DTV value of 0.242 ± 0.004, for three sets of multiple alignments corresponding to genes found in single copy in each of human, mouse, rat, and X. tropicalis, and two copies in X. laevis (sextuplets); pentuplets obtained by randomly selecting one X. laevis paralog from each sextuplet (5 A), and pentuplets in which only a single X. laevis sequence is known (5B).