Fig. 2
From: Evolutionary divergence in tail regeneration between Xenopus laevis and Xenopus tropicalis
No refractory period in tail regeneration in X. tropicalis. a, c Percent of animals had tail regeneration 7 days after amputation at indicated stages. Note that for X. laevis, nearly 100% tadpoles could regenerate the tail when amputated at stage 48 while only 37% could at stage 46. For X. tropicalis, nearly 100% could generate at all stages between 42 and 49. b, d The average regeneration score 7 days after amputation at indicated stages. Note that X. laevis, the average regeneration score at stage 46 was under 1, indicating absence of or very poor regeneration, while the score at stage 48 was close to 3, full regeneration. For X. tropicalis, the average regeneration score was all above 2 at all stages, indicating good regeneration, and no significance difference was found among different stages. ns, non-significant and ****p < 0.0001