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The molecular structures of adducts between the + and - enantiomers of 7,8-diol 9,10-epoxy benzo[a]pyrene and a double-stranded model for DNA, have been examined by empirical energy calculations. Low-energy structures were only obtained for A form, and not B form DNA. Both + and - adducts are of approximately equal energy. Some structural differences in the orientation of the BP chromophore in the two adducts were found.
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Aggarwal et al. (1983) studied this question.
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