Fig. 3. Dynamics of microinjected actin analog in a locomoting keratocyte fragment. See Sequence 2 (192 K). Overview of the fragments at time 0 and sequential images of selected region at times indicated in min:s are shown. Dotted lines indicate positions fixed with respect to the substratum. At the leading edge, actin speckles (indicated by arrows) are stationary with respect to the substratum and gradually decrease in brightness. At the rear, actin speckles move forward with the rear edge. Bar, 2 µm.
