Helical twist controls the thickness of F-actin bundles.

@article{Claessens2008HelicalTC,
  title={Helical twist controls the thickness of F-actin bundles.},
  author={Mireille M A E Claessens and Christine Semmrich and Laura Liliana Ramos and Andreas R. Bausch},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2008},
  volume={105 26},
  pages={8819-22}
}
In the presence of condensing agents such as nonadsorbing polymer, multivalent counter ions, and specific bundling proteins, chiral biopolymers typically form bundles with a finite thickness, rather than phase-separating into a polymer-rich phase. Although short-range repulsive interactions or geometrical frustrations are thought to force the equilibrium bundle size to be limited, the precise mechanism is yet to be resolved. The importance of the tight control of biopolymer bundle size is… CONTINUE READING