Electric and electrophoretic inversion of the DNA charge in multivalent electrolytes

Binquan Luan, Aleksei Aksimentiev

Research output: Contribution to journalArticle

Abstract

Counterion-induced inversion of the DNA charge was characterized through extensive molecular dynamics simulations. We observed reversal of the DNA motion in an external electric field upon increasing the concentration of trivalent or quadrivalent counterions. In the case of a divalent electrolyte, inversion of the DNA's electric charge was observed at high concentrations of the electrolyte but not reversal of the DNA's electrophoretic motion. We demonstrate that inversion of the electrophoretic mobility of the DNA results from a complex interplay of electrostatics and hydrodynamics.

Original languageEnglish (US)
Pages (from-to)243-246
Number of pages4
JournalSoft Matter
Volume6
Issue number2
DOIs
StatePublished - Dec 1 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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