Abstract:
A systematic study of carrier transfer along DNA dimers, trimers and polymers including poly(dG)-poly(dC), poly(dA)-poly(dT), GCGCGC..., ATATAT... is presented allowing to determine the spatiotemporal evolution of electrons or holes along a N base-pair DNA segment. Physical quantities are defined including maximum transfer percentage
p and pure maximum transfer rate
p/
T when a period
T is defined; pure mean transfer rate
k and speed
u=
kd, where
d is the charge transfer distance. The inverse decay length
β for the exponential fit
k=
k0exp(-
βd) and the exponent
η for the power-law fit
k=
k0′N-η are computed.
β≈0.2-2 Å
-1,
k0 is usually 10
-2-10
-1 PHz, generally ≈10
-4-10 PHz.
η≈1.7-17,
k0′ is usually 10
-2-10
-1 PHz, generally ≈10
-4-10
3 PHz. The results are compared with theoretical and experimental works. This method allows to assess the extent at which a specific DNA segment can serve for charge transfer.
Notes:
cited By 25
Publisher's Version
