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Rat liver DNA was treated in vitro with benzo[a]pyrene-diolepoxide (BPDE), the ultimate carcinogenic metabolite derived from the polycyclic hydrocarbon benzo[a]pyrene. On incubation of the reacted DNA, apurinic sites developed which gave rise to strand breakage in alkaline solution. The reduction in molecular weight produced by these breaks was measured by(More)
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