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Cover Figure

ONLINE COVER This week features a Research Article that shows that members of the Abl family of tyrosine kinases are required for chemokine-dependent homeostatic circulation of T cells between the blood and secondary lymphoid organs, as well as for the recruitment of T cells to sites of inflammation. The image depicts the homeostatic migration of T cells. [Image: Yana Hammond, AAAS]

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