This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1093/rpd/ncl453 in citations.
Computer simulation of strand break yields in plasmid pBR322: DNA damage following decay
Computer simulation of strand break yields in plasmid pBR322: DNA damage following decay
This paper presents results of (125)I effects on plasmid pBR322 in aqueous solution, simulating the complete transport of Auger and X rays up to the chemical phase. In addition to new sampling algorithms, new electronic cross sections are included. Simulations were carried out both with (125)I, boun...
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Personal Name(s): | Edel, S. |
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Terrissol, M. / Peudon, A. / Kümmerle, E. / Pomplun, E. | |
Contributing Institute: |
Abteilung Sicherheit und Strahlenschutz; S |
Published in: | Radiation protection dosimetry, 122 (2006) |
Imprint: |
Ashford
Oxford Univ. Press
2006
|
DOI: |
10.1093/rpd/ncl453 |
PubMed ID: |
17185311 |
Document Type: |
Journal Article |
Research Program: |
Nukleare Sicherheitsforschung |
Series Title: |
Radiation Protection Dosimetry
122 |
Subject (ZB): | |
Publikationsportal JuSER |
This paper presents results of (125)I effects on plasmid pBR322 in aqueous solution, simulating the complete transport of Auger and X rays up to the chemical phase. In addition to new sampling algorithms, new electronic cross sections are included. Simulations were carried out both with (125)I, bound to plasmid, or free, in its vicinity. The influence of the hydroxyl radical scavenger dimethyl sulfoxyde (DMSO) has also been tested, underlying that, in naked DNA, double strand breaks (caused by the decay of bound (125)I) are mainly due to direct hits. The calculated yields of relaxation events (RE) and linearization events (LE) show good agreement with experimental ones: when (125)I is bound to the plasmid pBR322, 0.16 RE and 0.83 LE per decay (without DMSO) are then observed. Then, when 2 mol DMSO is added, RE and LE probabilities become 0.22 and 0.76. The very light differences with those from literature could arise from experimental conditions. |