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Cover Figure

ONLINE COVER This week's issue features a Research Article that identified genes encoding factors that promote cell invasion across basement membranes, a process that occurs during development, inflammatory responses, and cancer metastasis. The image is a composite time series showing a cell (green) breaching a basement membrane (purple). [Image: David Q. Matus, Biology Department, Duke University]

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