Coiling Instability of Multilamellar Membrane Tubes with Anchored Polymers

Details Coiling Instability of Multilamellar Membrane Tubes with Anchored Polymers Coiling Instability of Multilamellar Membrane Tubes with Anchored Polymers

2000-08-30

arxiv.org/abs/cond-mat/0008435v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages + 7 GIF figures + 10 JPEG figures

Scientific paper

10.1103/PhysRevE.63.031603

We study experimentally a coiling instability of cylindrical multilamellar stacks of phospholipid membranes, induced by polymers with hydrophobic anchors grafted along their hydrophilic backbone. Our system is unique in that coils form in the absence of both twist and adhesion. We interpret our experimental results in terms of a model in which local membrane curvature and polymer concentration are coupled. The model predicts the occurrence of maximally tight coils above a threshold polymer occupancy. A proper comparison between the model and experiment involved imaging of projections from simulated coiled tubes with maximal curvature and complicated torsions.

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