Fig. 2
From: Chloroethylating anticancer drug-induced mutagenesis and its repair in Escherichia coli
Mutant frequencies induced by BCNU (a, d), ACNU (b, e), and TMZ (c, f) in the wild-type (open circles), KT01121 (closed diamonds), NR12999 (closed triangles), and NR11312 (closed squares) strains. Statistical analysis was performed using the Student’s t test. **p <  0.01 and *p < 0.05 when compared to the mutation frequency of the wild-type strain. ††p < 0.01 and †p < 0.05 when compared to the mutant frequency of control without treatment