TABLE 4.

Frequency of mutants resistant to Fos (128 μg/ml) of the wild-type strain PA14 and its hypermutable variants mutS and mutT

Strain	Mutant frequency	Increase (fold)
PA14	1.4 × 10−6	1
mutS::MAR2xT7	1.2 × 10−4	86
mutT::MAR2xT7	2.8 × 10−5	20