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Among p-phenylenediamine, benzidine and the analogues we previously tested, only the nitro-group containing 2-nitro-p-phenylenediamine, 3-nitro-o-phenylenediamine, 4-nitro-o-phenylenediamine and 4,4 -dinitro-2-biphenylamine caused base-pair reversion in the histidine locus of Salmonella typhimurium TA100. In order to determine the types of mutations involved, such as transversion or transition,...
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