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% population of untreated (green) and p38 MAPK-blocked (blue) cells that moved away from the fMLP signal within competing gradients. (a) CXCL8-fMLP gradient. (b) CXCL2-fMLP gradient. (c) LTB4-fMLP gradient. (d) Summary. CXCL8-fMLP, CXCL2-fMLP, LTB4-fMLP gradients are denoted as 8-fMLP, 2-fMLP, and 4-fMLP, respectively.
