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Cover Figure

COVER This week's issue features a Perspective that discusses the importance of cell-generated mechanical tension in the release of matrix-bound growth factors. The image depicts the release of transforming growth factor-β from a myofibroblast on a stiff matrix. [Image: Christopher Bickel, AAAS]

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