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Labeling and removal of Cy5 fluorophores from protein markers using the two-strand probe complex that exchanges via a four-way branch migration process. (A) A scheme depicting the modified erasing reaction. (B) Selective labeling and erasing of expressed GFP proteins in CHO cells. (C) Pixel intensities for cross sections indicated in (B). (D) Kinetics of DNA strand displacement reactions on fixed cells showing that four-way branch migrations facilitate efficient marker erasing.
