Table 1.

Number of animals investigated at different stages of development with Isl1 immunohistochemistry.

Developmental stages*
Embryonic		Premetamorphic	Prometamorphic	Metamorphic climax	Juveniles	n
Early	Late
24–37	38–45	46–51	53–59	60–66
30	30	6	7	7	2	82

*Staging of the Xenopus laevis embryos and larvae according to Nieuwkoop and Faber, 1967 [37].