Figure 7

Number of base substitutions per site (p-distance) from between sequences belonging to eight superfamilies of class II elements. See Figure 3 for detailed information. A) Gambol (seven families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: p-value = ** for all comparisons except b–d that was ns. B) Harbinger (three families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: p-value a–b = **; a–c = **; a–d = ns; b–c = ns; b–d = ns; c–d = **. C) hAT (four families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: all comparisons were significant at p < 0.001 except a–c = ns. D) Ikirara (two families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: a–b = **; a–c = ns; a–d = ns; b–c = **; b–d = ns, c–d = ns. E) Mariner (seven families). Kruskal-Wallis test: p-value = **, Ad hoc, Tukey non-parametric test: integer overflow. F) P (five families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: integer overflow. G) Tc1 (six families). Kruskal-Wallis test: p-value = ** Ad hoc, Tukey non-parametric test: integer overflow. H) Transib (Two families). Kruskal-Wallis test: p-value = **. Ad hoc, Tukey non-parametric test: all comparisons were significant at p < 0.001 except b–d = ns. P-value: ns = not significant; * < 0.05; ** < 0.001. a) 5′-TIR (population comparison), b) internal region (population comparison), c) 3′-TIR (population comparison), d) 5′-TIR to 3′-TIR within element (performed for each element within each of the populations analyzed). On top of each boxplot, the mean and standard deviation for the p-distances in each group of sequences are shown.