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Long Distance Charge Transport through DNA: Quantification and Extension of the Hopping Model
Author(s) -
Giese Bernd,
Spichty Martin
Publication year - 2000
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/1439-7641(20001215)1:4<195::aid-cphc195>3.0.co;2-b
Subject(s) - charge (physics) , chemical physics , extension (predicate logic) , dna , chemistry , biophysics , statistical physics , nanotechnology , physics , materials science , biological system , computer science , biology , quantum mechanics , biochemistry , programming language
Long distance charge transport through DNA occurs by a hopping mechanism. If the positive charge is injected into a guanine base, all guanines act as charge carriers. Because of the strong influence that the distance has on the charge‐transfer step, DNA strands with long adenine:thymine sequences also involve adenine as charge carriers. A prerequsite for this mechanism is that the electron transfer to an adjacent adenine base is faster than the H 2 O trapping reaction of the guanine radical cation. We have developed a model that can explain and qualitatively predict the product yields.