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Cover Figure

COVER This week features a Perspective that discusses how the activity of SOS is regulated by the binding of an allosteric Ras molecule. The image shows SOS and two molecules of Ras based on PDB 1nvu.

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