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Cover Figure

COVER This week features a Perspective on cAMP signaling in PC12 cells. The image shows PC12 cells developing neurites. [Image: Matthew J. Gerdin and Lee E. Eiden, NIH]

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