engleski

Overcharging in biological systems: Reversal of electrophoretic mobility of aqueous polyaspartate by multivalent cations

Charge reversal as an extreme case of charge compensation is directly observed by capillary electrophoresis for a negatively charged peptide in aqueous solutions of trivalent cations. Atomistic and coarse-grained simulations provide molecular interpretation of this eff ect showing that it is largely of electrostatic origin with a minor contribution of chemical speci ficity of the salt ions.

multivalent cations; electrophoresis; overcharging; molecular dynamics; Metropolis Monte Carlo

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