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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Modification of DNA by the benzo[a]pyrene metabolite diol-epoxide r-7,t-8-dihydroxy-t-9,10-oxy-7,8,9,10-tetrahydrobenzo[a]pyrene.

The structural modification of double-stranded circular DNA of simian virus 40 and plasmid ColE1 by in vitro binding of r-7,t-8-dihydroxy-t-9,10-oxy-7,8,9,10-tetrahydrobenzo[a]pyrene was studied. Stepwise hydrolysis with endonuclease S1 and DNase followed by DNA base analysis by thin-layer chromatography provided evidence that binding to adenine caused the local denaturation of DNA, whereas the more than 10-fold greater binding to guanine did not create such local denaturation. Of the two synthetic double-stranded polymers, poly(dA-dT).poly(dA-dT) and poly(dG-dC).poly(dG-dC), bound to the diol-epoxide, only the former showed a marked hydrolysis after endonuclease S1 treatment, whereas binding occurred 24-fold more on the latter.[1]

References

  1. Modification of DNA by the benzo[a]pyrene metabolite diol-epoxide r-7,t-8-dihydroxy-t-9,10-oxy-7,8,9,10-tetrahydrobenzo[a]pyrene. Kakefuda, T., Yamamoto, H. Proc. Natl. Acad. Sci. U.S.A. (1978) [Pubmed]
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