Page - 49 - in Charge Transport in DNA - Insights from Simulations
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CHAPTER4
DNAUnderExperimentalConditions
Reproduced inpartwithpermission from
M.Wolter,M.Elstner andT.Kubarˇ,
J. Phys.Chem.A,2011,115 (41),11238–11247.
Copyright2011,AmericanChemical Society.
MDsimulations ofDNA, in course of charge transfer simulations, are usually not
performedunder conditions resembling theexperimental setupof electric conduc-
tivity experiments. The DNA strands are connected to electrodes on both sides,
causingmechanical forces onto the double helical structure. Moreover, theDNA
strands are dried in some fashion to ensure themeasurements are not influenced
by the conductivityofwater.
Thereforethefirst taskfor thesimulationof thisexperimentalsetupis to investigate
the structure of double-stranded DNA under mechanical stress in complex with
varied amount ofwater and counterions. To get a first insight into the structure
ofDNAand the changesundermechanical stress,MDsimulations areperformed
with homogeneous sequences. Apart from the mechanical stress, the influence
of the environment on the structure and stability of the DNA double-strand is
investigated. Various amounts of water, as well as the counterions are seen to
contribute to the stabilizationof theDNAstructure.
49
Charge Transport in DNA
Insights from Simulations
- Title
- Charge Transport in DNA
- Subtitle
- Insights from Simulations
- Author
- Mario Wolter
- Publisher
- KIT Scientific Publishing
- Date
- 2013
- Language
- English
- License
- CC BY-SA 3.0
- ISBN
- 978-3-7315-0082-7
- Size
- 17.0 x 24.0 cm
- Pages
- 156
- Keywords
- Charge Transport, Charge Transfer, DNA, Molecular Dynamics, Quantum Mechanics
- Categories
- Naturwissenschaften Chemie
Table of contents
- Zusammenfassung 1
- Summary 3
- 1 Introduction 5
- 2 TheoreticalBackground 11
- 3 SimulationSetup 39
- 4 DNAUnderExperimentalConditions 49
- 5 ChargeTransport inStretchedDNA 69
- 6 ChargeTransport inMicrohydratedDNA 79
- 7 AParametrizedModel toSimulateCT inDNA 89
- 8 Conclusion 105
- Appendix 111
- A DNAUnderExperimentalConditions 111
- B CTinMicrohydratedDNA 117
- List ofPublications 137