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ONLINE COVER This week's issue features a Research Article that describes how the pathogen Porphyromonas gingivalis, which is implicated in oral diseases such as gingivitis and periodontitis, alters crosstalk between the complement C5a receptor and Toll-like receptor 2 to disable innate immune function. [Image: Photos.com]

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