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Science 30 November 2001:
Vol. 294. no. 5548, pp. 1879 - 1881
DOI: 10.1126/science.1064115
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Hedgehog Signaling: A Tale of Two Lipids

Philip W. Ingham

Hedgehog proteins constitute one of the major classes of intercellular signals that control inductive interactions during animal development. These proteins undergo unusual lipid modifications and signal through an unconventional transmembrane protein receptor that is characterized by a sequence motif implicated in sterol sensing. Recent studies suggest that the lipid adducts regulate the range and potency of the signals, whereas the sterol-sensing domain is essential for receptor activity.

Medical Research Council (MRC) Intercellular Signalling Group, Centre for Developmental Genetics, School of Medicine and Biomedical Science, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK. E-mail: p.w.ingham{at}sheffield.ac.uk

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