Electronic Transport in DNA
arXiv:q-bio/0504004 · doi:10.1529/biophysj.105.064014
Abstract
We study the electronic properties of DNA by way of a tight-binding model applied to four particular DNA sequences. The charge transfer properties are presented in terms of localisation lengths, crudely speaking the length over which electrons travel. Various types of disorder, including random potentials, are employed to account for different real environments. We have performed calculations on poly(dG)-poly(dC), telomeric-DNA, random-ATGC DNA and lambda-DNA. We find that random and lambda-DNA have localisation lengths allowing for electron motion among a few dozen base pairs only. A novel enhancement of localisation lengths is observed at particular energies for an increasing binary backbone disorder. We comment on the possible biological relevance of sequence dependent charge transfer in DNA.
12 pages RevTeX4 with 17 figures, submitted to Biophysical Journal
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Cited by in corpus (41)
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- Flat Bands Under Correlated Perturbations
- DNA double helices for single molecule electronics
- Charge transport through bio-molecular wires in a solvent: Bridging molecular dynamics and model Hamiltonian approaches
- Point Mutations Effects on Charge Transport Properties of the Tumor-Suppressor Gene p53
- Absence of extended states in a ladder model of DNA
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