Opposing inputs by Hedgehog and Brinker define a stripe of hairy expression in the Drosophila leg imaginal disc.

Abstract excerpt

The sensory organs of the Drosophila adult leg provide a simple model system with which to investigate pattern-forming mechanisms. In the leg, a group of small mechanosensory bristles is organized into a series of longitudinal rows, a pattern that depends on periodic expression of the hairy gene (h) and the proneural genes achaete (ac) and scute (sc). Expression of ac in longitudinal stripes in prepupal leg discs...

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