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Cover Figure

COVER This week's issue features a Research Article that demonstrates that autophosphorylation of tyrosine residues in the tyrosine kinase domain of fibroblast growth factor receptor 1 (FGFR1) is kinetically controlled. The image shows the crystal structure of the tyrosine kinase domain of FGFR1 and is based on PDB entry 1fgk. [Image: Chris Bickel, AAAS]

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