Confining potential when a biopolymer filament reptates

Bo Wang, Juan Guan, Stephen M. Anthony, Sung Chul Bae, Kenneth S Schweizer, Steve Granick

Research output: Contribution to journalArticlepeer-review


Using single-molecule fluorescence imaging, we track Brownian motion perpendicular to the contour of tightly entangled F-actin filaments and extract the confining potential. The chain localization presents a small-displacement Hookean regime followed by a large amplitude regime where the effective restoring force is independent of displacement. The implied heterogeneity characterized by a distribution of tube width is modeled.

Original languageEnglish (US)
Article number118301
JournalPhysical review letters
Issue number11
StatePublished - Mar 16 2010

ASJC Scopus subject areas

  • General Physics and Astronomy


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