期刊
EUROPHYSICS LETTERS
卷 64, 期 3, 页码 413-419出版社
EDP SCIENCES S A
DOI: 10.1209/epl/i2003-00218-2
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We consider structures formed by one semi flexible polyelectrolyte ( PE) and one oppositely charged sphere and calculate the interaction between two such complexes within the ground-state approximation, where the PE assumes its optimal configuration. Using parameters appropriate for DNA-histone systems, we find the second virial coefficient of inter-complex interactions to be negative for intermediate salt concentrations within the range where stable complexes are formed, in agreement with experiments. A simple screened monopole-dipole model reproduces these findings.
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