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Mutant and sibling embryos at the 24-somite stage were fixed, incubated with the anti-keratin antibodies panKr1-8 (A,B) or 79.14 (C,D), and then co-stained with DAPI. Confocal images of the midline of the tailbud, with anterior to the left. Note the thinner presumptive epidermis in the mutants compared to that in the siblings.
