Figure 4

Gene duplication rate via retroposition. The rates are the slopes of the linear functions (red lines) fitted to the curves of the cumulative distributions of retrogenes. All of the linear functions are fitted to the part of the curves with K_s ≤ 0.05. Parameters of the linear functions are shown in Table 1. (a) Retrogenes in two-copy families. The linear functions are H_pr and M_pr. (b) Retrogenes in the entire genome. The linear functions are H_r and M_r.