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Cover Figure

ONLINE COVER This week features a Research Article (see also the associated Perspective) that describes the mode of interaction between the mitogen-activated protein kinase p38α and its inactivating phosphatase, MKP5. The image shows the crystal structure of p38α in complex with the kinase binding domain of MKP5. [Image: Yana Hammond/Science Signaling]

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