Polarons in DNA: transition from guanine to adenine transport
Article Abstract:
Experiments on hole transport in DNA are interpreted as showing that a hole introduced onto a guanine (G) followed by a series of adenines (As) in a DNA duplex travels. Estimation of energy fluctuations in the environment and conformational changes of the DNA find them to be large enough so that GGG and even G can still act as hole traps but trapping on the former is still very much more likely because of its lower energy.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Effect of water drag on diffusion of drifting polarons in DNA
Article Abstract:
The influence of water drag on diffusion of drifting polarons in DNA is strudied. It is inferred that the drag is proportional to the velocity of the polaron and to the orientational relaxation time of the water molecules and it is also a function of the Coulomb interactions of the fractional charges on the base comprising the polaron.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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[H.sub.2][O.sub.3] as a reactive oxygen species: Formation of 8-oxoguanine from its reaction with guanine
Article Abstract:
The reaction of guanine with [H.sub.2][O.sub.3] in the absence and presence of a water molecule leading to the formation of 8-joxoguanine (8-oxoG) is investigated. It is found that [H.sub.2][O.sub.3] is dissociated easily under ambient conditions because of which [H.sub.2][O.sub.3] serve as an effective reactive oxygen species.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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