The sequence-dependent transmission properties through double helix DNA molecules

In this paper, a double helix model of charge transport in a DNA molecule is presented, and the transmission spectra and I V curves of four kinds of periodic sequences DNA are obtained. The results show that the transmission characteristics of DNA are not only related to the longitudinal transport but also to the transverse transport of the molecule. The more the composition of bases, the bigger the percent of theta-direction, and the conductive ability reduces. For a different sequence with same composition, the less the number of consecutive appearance of the same base is, the lower the conductive ability.