Base pair dynamic assisted charge transport in DNA
نویسندگان
چکیده
منابع مشابه
Base pair dynamic assisted charge transport in DNA
An 1d model with time-dependent random hopping is proposed to describe charge transport in DNA. It admits to investigate both diffusion of electrons and their tunneling between different sites in DNA. The tunneling appears to be strongly temperature-dependent. Observations of a strong (exponential) as well as a weak distance dependence of the charge transfer in DNA can be explained in the frame...
متن کاملEffect of base-pair inhomogeneities on charge transport along DNA mediated by twist and radial polarons
Some recent results for a three–dimensional, semi–classical, tight– binding model for DNA show that there are two types of polarons, named radial and twist polarons, that can transport charge along the DNA molecule. However, the existence of two types of base pairs in real DNA, makes it crucial to find out if charge transport also exist in DNA chains with different base pairs. In this paper we ...
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The base pair stack within double helical DNA provides an effective medium for charge transport. The DNA pi-stack mediates oxidative DNA damage over long molecular distances in a reaction that is exquisitely sensitive to the sequence-dependent conformation and dynamics of DNA. A mixture of tunneling and hopping mechanisms have been proposed to account for this long-range chemistry, which is gat...
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Strand separation is a fundamental molecular process essential for the reading of the genetic information during DNA replication, transcription and recombination. However, DNA melting in physiological conditions in which the double helix is expected to be stable represents a challenging problem. Current models propose that negative supercoiling destabilizes the double helix and promotes the spo...
متن کاملEffect of base-pair inhomogeneities on charge transport along the DNA molecule, mediated by twist and radial polarons
Some recent results for a three-dimensional, semi-classical, tightbinding model for DNA show that there are two types of polarons, namely radial and twist polarons,which can transport charge along theDNAmolecule.However, the existence of two types of base pairs in real DNA makes it crucial to find out if charge transport also exists in DNA chains with different base pairs. In this paper, we add...
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ژورنال
عنوان ژورنال: Journal of Experimental and Theoretical Physics Letters
سال: 2002
ISSN: 0021-3640,1090-6487
DOI: 10.1134/1.1463113