Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
BP: Fachverband Biologische Physik
BP 19: Semiflexible Polymers and Networks
BP 19.7: Vortrag
Mittwoch, 27. Februar 2008, 19:00–19:15, PC 203
Conformations of zipped filaments — •Petra Gutjahr1, Reinhard Lipowsky1, and Jan Kierfeld2 — 1Max Planck Institute of Colloids and Interfaces, Theory & Bio-Systems, 14424 Potsdam, Germany — 2Technical University of Dortmund, Theoretical Physics I, 44221 Dortmund, Germany
We study the zipping of two filaments with an attractive interaction and pinned filament ends based on experiments using microscopic pillar arrays. For the cases of weak and strong attraction between filaments, we analyze the influence of the filaments' stiffness and thermal fluctuations on the zipped equilibrium shape. Thereby we propose a scheme, by which the magnitude of the attraction between the filaments can be deduced from experimentally observed conformations. Our results should be applicable to actin filaments bundles induced by various crosslinker proteins and multivalent cations, but also to bundles formed by other types of semiflexible polymers.