6533b86cfe1ef96bd12c8da2
RESEARCH PRODUCT
Counterion-mediated attraction and kinks on loops of semiflexible polyelectrolyte bundles.
Zvonimir DogicPaul A. JanmeyAndrejs Cēberssubject
chemistry.chemical_classificationQuantitative Biology::BiomoleculesMaterials scienceCondensed matter physicsMolecular ConformationGeneral Physics and AstronomyThermal fluctuationsCharge densityBendingCurvatureAttractionPolyelectrolyteActinsQuantitative Biology::Cell BehaviorQuantitative Biology::Subcellular ProcessesCondensed Matter::Soft Condensed MatterActin CytoskeletonElectrolyteschemistryModels ChemicalChemical physicsThermodynamicsCounterionElasticity (economics)description
The formation of kinks in a loop of bundled polyelectrolyte filaments is analyzed in terms of the thermal fluctuations of charge density due to polyvalent counterions adsorbed on the polyelectrolyte filaments. It is found that the counterion-mediated attraction energy of filaments depends on their bending. By consideration of curvature elasticity energy and counterion-mediated attraction between polyelectrolyte filaments, the characteristic width of the kink and the number of kinks per loop is found to be in reasonable agreement with existing experimental data for rings of bundled actin filaments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-06-21 | Physical review letters |