Image removed due to copyright considerations See Figure 1 in Pollard, T D, and G.G. Borisy Cellular Motility Driven by assembly and Disassembly of Actin Filaments ce112:453465(21Feb2003Image removed due to copyright considerations. See Figure 1 in Pollard, T. D., and G. G. Borisy. "Cellular Motility Driven by Assembly and Disassembly of Actin Filaments." Cell 112: 453-465 (21 Feb 2003)