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Fig. 1
Fluorescence images of zebrafish PGCs after exposure to various concentrations of EE2. A: In all treatment groups, normal PGCs were observed in the anterior region of the yolk extension at 24 hpf. B: In the 1 ng/L, 10 ng/L, and 100 ng/L EE2 exposure groups, ectopic PGCs were primarily observed along the branchial arch, similarly to the spadetail mutant. C: In the 500 ng/L, 1 μg/L and 2 μg/L EE2 exposure groups, many ectopic PGCs were observed along the branchial arch, on the back, in the abdomen, and along the trunk. A′, B′, and C′: Bright-field views show the morphology of the embryos.
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Full text @ Reprod. Biol. Endocrinol.