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Cover Figure

COVER This week's issue features a Research Article that identifies Kif7 as the mammalian equivalent of the Drosophila kinesin-like protein Costal2 in Hedgehog signaling. The image shows the polydactyly characteristic of Kif7-null mice. [Image: Rong Mo, Program in Developmental and Stem Cell Biology, The Hospital for Sick Children]

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