On the cover
Fly neuroblasts polarize perfectly (shown by pink labeling for a polarity marker) even when lacking both APC genes (blue cells that appear purple in combination with pink label). The mutant neuroblasts divide more slowly than wild-type cells and some have bent spindles (green label is tubulin), but axon development is normal.
See page 203.
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Deconstructing Survivin: comprehensive genetic analysis of Survivin function by conditional knockout in a vertebrate cell line