Volume 71, Number 6, September 2005
|Page(s)||1022 - 1028|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||10 August 2005|
Stability of strong polyelectrolyte-macroion complexes
Physics Department, Technical University of Munich - D-85748 Garching, Germany
Accepted: 15 July 2005
We investigate the thermodynamic stability of complexes formed by one semiflexible charged polymer wrapped around an oppositely charged sphere. Choosing parameters for DNA and histones, we determine all conformational eigen-modes and the corresponding eigen-value spectrum of the complexed chain, from which the free energy of complexation and thus the reaction constant is obtained. The resulting complexation diagram exhibits qualitative agreement with experimental results as a function of salt and DNA/histone concentration.
PACS: 87.15.-v – Biomolecules: structure and physical properties / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 82.70.Dd – Colloids
© EDP Sciences, 2005
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