Fig. 4. Cycle time as a function of cell radius at mitosis (r_B) for Xenopus laevis under different experimental growth conditions. Data (open circles) were taken from the indicated figures of Wang et al. (Wang et al., 2000) and the filled circles are fitted to Eqn 13 with the timer period T₀, the inverse growth rate constant and the critical size r_C shown on each panel. (A) Diploid wild type from Fig. 7. (B) Haploid wild type from Fig.10. (C) Diploid wild type with 100 ng/ml EGF from Fig. 13. (D-F) Progressively inhibited growth rate in diploid wild type with (D) 0.10 µg/ml cycloheximide (CHX) from Fig. 16; (E) 0.14 µg/ml CHX from Fig. 17 and (F) 0.18 µg/ml CHX from Fig. 16 in Wang et al. (Wang et al., 2000).