title: Confining potential when a biopolymer filament reptates.
abstract: 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.
authors.affiliation: Departments of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801 USA.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Juan
authors.initials: J
authors.lastname: Guan
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Anthony
authors.forename: Sung Chul
authors.initials: SC
authors.lastname: Bae
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Schweizer
authors.forename: Steve
authors.initials: S
authors.lastname: Granick
mesh_terms: D000199:Actins / Q000737:chemistry* / Q000648:ultrastructure*; D003198:Computer Simulation; D019281:Dimerization; D008956:Models, Chemical; D008958:Models, Molecular
chemical_list: D000199:Actins