Current–voltage characteristics of double-strand DNA sequences

• Autor(a) principal: Moreira, Darlan Araújo
• Data de Publicação: 2009
• Outros Autores: Bezerril, Leonardo Mafra, Albuquerque, Eudenilson Lins de, Fulco, Umberto Laico, Oliveira, E. L. de, Sousa, J. S. de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/30643
• topic: Tight-binding Hamiltonian; DNA molecule; Hopping mechanism; Electronic properties; Quasiperiodic structures

We use a tight-binding formulation to investigate the transmissivity and the current–voltage (I–V) characteristics of sequences of double-strand DNA molecules. In order to reveal the relevance of the underlying correlations in the nucleotides distribution, we compare the results for the genomic DNA sequence with those of artificial sequences (the long-range correlated Fibonacci and Rudin–Shapiro one) and a random sequence, which is a kind of prototype of a short-range correlated system. The random sequence is presented here with the same first neighbors pair correlations of the human DNA sequence. We found that the long-range character of the correlations is important to the transmissivity spectra, although the I–V curves seem to be mostly influenced by the short-range correlations