Fig. 13. Axolotl. Late gastrula treated for 1 day with M/100 mercaptoethanol. Medullary plate very flattened.
FIG. 14. Absence of regeneration blastema in Axolotl tadpole treated with ß-mercaptoethanol (M/300).
FIG. 15. Regeneration blastema in control axolotl tadpole.
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