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Science 7 July 2006:
Vol. 313. no. 5783, pp. 50 - 51
DOI: 10.1126/science.1130785
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Perspectives

DEVELOPMENTAL BIOLOGY:
Morphing into Shape

David L. Stern

Two appendages of the fly, the haltere and the wing, grow to very different sizes. Limited expression and mobility of a growth morphogen is partly responsible for this difference.

The author is in the Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. E-mail: dstern{at}princeton.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)