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Electronic transport in DNA sequences: The role of correlations and inter-strand coupling by E.L. Albuquerque; M.L. Lyra; F.A.B.F. de Moura is a Physics and Astronomy article available to read on EtoBox.

What is Electronic transport in DNA sequences: The role of correlations and inter-strand coupling about?

We investigate the electronic properties in sequences of single and double-strand DNA molecules made up from the nucleotides guanine G, adenine A, cytosine C and thymine T. Using a tight-binding formulation we solve the timedependent Schro ̈dinger equation to compute the spread of initially localized wave packets. We also compute the localization length in finite segments by employing a Green's function recursion method. We compare the results for the genomic DNA sequence with those of two artificial sequences, namely the quasiperiodic Rudin-Shapiro one, which has long-range correlations, and a intra-strand pair correlated DNA sequence. We found that the short-range character of the intra-strand correlations suffices for a quantitative description of the one-electron wave-packet dynamics in the doublestrand real DNA sequences. Further, the inter-strand coupling promotes electronic transport over a longer segment.

Who reads Electronic transport in DNA sequences: The role of correlations and inter-strand coupling?

Author

E.L. Albuquerque; M.L. Lyra; F.A.B.F. de Moura

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-4371)

Published

2006

Language

EN

Field

Physics and Astronomy (Physical Sciences)