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Mutations in numb cause RP2 to RP2sib fate transformation. (A–E) Dorsal views of dissected stage 15 embryos stained with rabbit anti-Eve. Anterior is to the left. (Arrows) RP2 neuron (A) or the RP2 position (C–E). (F,G) Ventral views of stage 12 whole-mount embryos stained with rabbit anti-Eve. Anterior is up. (Arrowheads) RP2sib. Compare the fading Eve staining in the smaller and the larger cell in nb796 (G) with the fading Eve staining in the smaller cell only in wt (F).
