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Cover Figure

ONLINE COVER This week features a Research Article that identifies ARAP3 as the downstream effector of phosphoinositide 3-kinase (PI3K) in the regulation of sprouting angiogenesis during development. The image shows a wild-type mouse embryo stained for a marker of vascular endothelial cells. [Image: Laure Gambardella, Inositide Laboratory, The Babraham Institute]

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