Supporting information for Amann and Pollard (December 11, 2001) Proc. Natl. Acad. Sci. USA, 10.1073/pnas.211556398.

Supporting Movie 4

Movie 4.

Elongation of high-density branches. Unbound components were washed from the branched structures in Movie 3, and 2 mM monomeric actin was added to the cell. Exposures of 300 ms were collected every 5 s. The field shown is 43 ´ 34 mm. The movie is presented at 30´ time compression.