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Cover Figure

COVER This week's issue features a Perspective about mechanisms by which proteins that shuttle between the nucleus and cytoplasm regulate TGF-β signaling through Smads. [Image: Christopher Bickel, AAAS]

[Table of Contents]

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