The production by dibenzo[a,e]fluoranthene (DBF) of DNA-protein cross-links in cultured mouse fibroblasts is probably mediated by the activation of proximate metabolites of DBF and not by the DBF molecule itself. In order to test this hypothesis, several agents that enhance
Dibenzofluoranthene-12,13-dihydrodiol (DBF-12,13-DHD) is six times more mutagenic in Salmonella TA100 than dibenzofluoranthene-3,4-dihydrodiol (DBF-3,4-DHD). However, these two major dibenzo[a,e]fluoranthene (DBF) proximate metabolites, which are immediate precursors of the corresponding diolepoxides, showed on an equimolar basis nearly identical initiation activities on mouse
The metabolism of the polycyclic hydrocarbon dibenzo[a,e]fluoranthene (DBF) has been investigated. Two new primary metabolites have been identified by proton n.m.r. as the trans diaxial dihydrodiols of the bay and of the pseudo bay regions of DBF. In addition, twelve
The formation of DNA adducts was investigated in mouse fibroblasts treated with dibenzo[a,e]fluoranthene (DBF), using the nuclease P1 modification of the 32P-post-labeling method. In order to separate the poorly soluble, bulky DNA adducts of this potent sarcomogenic, six-ring polycyclic aromatic
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