Fig. 2
From: New indicator Escherichia coli strain for rapid and accurate detection of supF mutations
Nalidixic acid and streptomycin sensitivity of (a) KS40/pOF105 and (b) RF01 cells transformed with the plasmids supF+ (pZ189-T_E107K/D402E) and supF− (pZ189-T_E107K/D402E (122 T)). Sm, streptomycin; Nal, nalidixic acid