کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
979687 1645122 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electronic transport in DNA sequences: The role of correlations and inter-strand coupling
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Electronic transport in DNA sequences: The role of correlations and inter-strand coupling
چکیده انگلیسی

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 time-dependent Schrödinger 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 double-strand real DNA sequences. Further, the inter-strand coupling promotes electronic transport over a longer segment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 370, Issue 2, 15 October 2006, Pages 625–631
نویسندگان
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