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Kinetic measurements of DNA uptake. (A) A reconstituted nucleus being dragged after a 3-μm-diameter bead, linked by a molecule of DNA. The time interval between measurements in the first and second images is 532 sec, between the second and third, 302 sec. Note the shortening of the maximum distance between bead and nucleus. (B) measurements of maximum extension vs. time with conditions as marked. The solid line shows a fit to Eq. 4.
