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Cover Figure

COVER This Focus Issue features an Editorial Guide on drug development and signaling molecules as therapeutic targets. The image depicts a pharmaceutical agent designed to specifically inhibit a protein kinase. [Image: M.E.M Noble, J. A. Endicott, L. N. Johnson]

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