also tested. 4-Nitroquinoline 1-oxide, 4-hydroxyaminoquinoline 1oxide, 3-methyl-4-nitropyridine 1-oxide, and 2,3-dimethyl-4nitropyridine 1-oxide caused wider growth-inhibiting zones with mutants of Escherichia coli, such as the DNA polymerase 1-deficient mutant, po/Al, and the recombination-deficient mutants, r<?cA13 and recB21, than with the wild strain. These compounds also caused wider growt...
