Fig. 3. Somites in b567 mutant embryos are enlarged in the AP dimension. Whereas live 24 hpf wild-type embryos have reiterated somites over regular intervals (A, arrows), b567 mutant embryos (B) have enlarged somites (arrows) with weak boundaries in between (arrowhead). (C-E) F59 staining highlights the large, irregular boundaries in both b567 mutant and her1+7 MO-injected embryos. Again, arrows denote strong boundaries and arrowheads denote weak boundaries. Molecular evidence of large somites is seen by expression of a titin homolog (F,G).

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