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- W2048371938 abstract "In this study, calf thymus DNA was reacted in vitro with cyclopenta[cd]pyrene 3,4-epoxide (CPPE) or its metabolites, 3,4-dihydroCPP-3,4-diol (CPP-3,4-diol) and 4-hydroxy-3,4-dihydroCPP (4-OH-DCPP), activated with sulfotransferase. The adducts formed were analyzed by HPLC with fluorescence detection following enzymatic digestion of DNA to deoxynucleosides. We have shown previously that the major CPPE-reacted DNA adducts are cis-3-(deoxyguanosin-N2-yl)-4-hydroxy-3,4-dihydroCPP. Sulfotransferase activation of trans-CPP-3,4-diol yielded two adducts that were identical to the products resulting from the reaction of CPPE with DNA, while cis-CPP-3,4-diol gave very low covalent binding. Two adducts formed by sulfotransferase activation of 4-OH-DCPP were identical to the products of the reaction of synthetic 4-NaO3S-O-DCPP or sulfotransferase-activated 4-OH-DCPP with deoxyguanosine. These results indicate that guanine is the predominant site of CPP adduct formation in DNA, and that the 4-hydroxy-3-dGuo adducts can arise by reaction of DNA with either CPPE or sulfotransferase-activated trans-CPP-3,4-diol." @default.
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- W2048371938 date "1999-03-01" @default.
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- W2048371938 title "DNA adduct formation by secondary metabolites of cyclopenta[cd]pyrene in vitro" @default.
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- W2048371938 doi "https://doi.org/10.1016/s0304-3835(98)00319-x" @default.
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