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Motion of microtubules in living cells. (A) Dynamics of microtubules in a small region of the cell (yellow square in left panel); the time lag between frames was 60 s. (Yellow star) Fixed reference point. Scale bar, 10 μm. (B) Intensity profiles recovered along the yellow lines for the microtubules observed in the zoom-in images. The S/N of these filaments was ∼10. To see this figure in color, go online.
