Fig. 6. Dynein containing structures show rapid changes in direction. (a) Dynein-containing structures exhibit bidirectional movement along a given track (arrowhead) (see Movie 3 in jcs.biologists.org ). In the last panel, the positions at each time point are indicated by a colored dot, with anterograde movement in red and retrograde in green. The yellow color results from overlapping of red and green dots, suggesting that the vesicle was moving along the same track after switching direction. The elapsed time is shown as `seconds.milliseconds'. Scale bar, 5 µm. (b) Patterns of dynein movements are shown by plotting distance from the MTOC over time. Typical examples of bidirectional movements are shown, with each single run represented by a different color. Time intervals between adjacent frames are 302 mseconds. Retrograde movements appear as descending distance from the MTOC with time, whereas anterograde movements appear as the opposite.

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