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(A) ArrB1-eYFP and actin-mCherry coaccumulated within the leading edge upon bath stimulation by fMLP (n = 6). (B) ArrB1-eYFP and actin-mCherry coaccumulated at the leading edge of cells (n = 5) during chemotaxis driven by the fMLP gradient generated by a needle source of fMLP (*). The distribution of ArrB1-eYFP and F-actin (actin-mCherry) is shown in green and red, respectively.
