Strong Localization of Positive Charge in DNA

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dc.creatorUskov, D. B.
dc.creatorBurin, A. L.
dc.date2008-01-23
dc.date2008-03-15
dc.date.accessioned2026-07-07T09:26:41Z
dc.date.available2026-07-07T09:26:41Z
dc.descriptionMicroscopic mechanisms of positive charge transfer in DNA remain unclear. A quantum state of electron hole in DNA is determined by the competition of a pi-stacking interaction $b$ smearing a charge between different base pairs and interaction $λ$ with the local environment which attempts to trap charge. To determine which interaction dominates we investigated charge quantum states in various $(GC)_{n}$ sequences choosing DNA parameters satisfying experimental data for the balance of charge transfer rates $G^{+} \leftrightarrow G_{n}^{+}$, $n=2,3$ \cite{FredMain}. We show that experimental data can be consistent with theory only under an assumption $b\ll λ$ meaning that charge is typically localized within a single $G$ site. Consequently any DNA sequence including the one consisting of identical base pairs behaves more like an insulating material than a molecular conductor.
dc.description11 pages 4 figures
dc.identifierhttps://arxiv.org/abs/0801.3502
dc.identifierhttp://arxiv.org/abs/0801.3502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156840
dc.subjectSoft Condensed Matter
dc.subjectStatistical Mechanics
dc.titleStrong Localization of Positive Charge in DNA
dc.typetext

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