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Cover Figure

COVER This week's issue features a Research Article that identifies the direct target genes of Notch. Notch regulates the differentiation of adult muscle progenitor cells, and the image shows muscle progenitor cells (green) in the wing disc of a fly. [Credit: Sarah J. Bray, University of Cambridge, UK]

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Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882