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Cover Figure

COVER This week features a Review that discusses calcium signaling between the mitochondria and the ER. The cover image, an electron micrograph of a PC12 cell, illustrates the juxtaposition of mitochondria and the ER that allows this signaling to take place. [Image: Prof. J. Meldoles, DIBIT, Milan, Italy]

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