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. 2004 Apr 26;165(2):233–242. doi: 10.1083/jcb.200311040

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Copyright © 2004, The Rockefeller University Press

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Figure 10. — A Brownian ratchet model for bundling-mediated motility of L. monocytogenes. Individual filaments form weak attachments with the bacterial surface. However, incorporation of filaments into bundles is incompatible with their binding to the bacterial surface. Moving the bacteria to the right maximizes the number of favorable bonds because it can attach to growing individual filaments while leaving bundled filaments behind it. The bacteria is blue. Green lines represent actin and red lines newly polymerized actin. Bundling proteins are represented as black ovals.