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Nature 410, 599-604 (29 March 2001) | doi:10.1038/35069099;

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Hedgehog acts as a somatic stem cell factor in the Drosophila ovary

Secreted signalling molecules of the Hedgehog (Hh) family have many essential patterning roles during development of diverse organisms including Drosophila and humans. Although Hedgehog proteins most commonly affect cell fate, they can also stimulate cell proliferation.

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