TABLE 1.

Strains and plasmids used in this work

Strain or plasmid	Relevant genotype or characteristics	Source or reference
Strains
TK603	uvrA6	17
RW82	Same as TK603 but ΔumuDC595::cat	37
EC8	Same as TK603 but ΔumuDC596::ermGT	9
RM4193	ΔholE202::cat	29
DV01	Same as EC8 but ΔholE202::cat	This work
DV02	Same as EC8 but dnaQ903::tet spq-2 zae::Tn10d-Cam	34
DV03	Same as EC8 but spq-2 zae::Tn10d-Cam	34
DV05	Same as EC8 but mutD5 zaf-13::Tn10	34
DV12	Same as TK603 but mutD5 zaf-13::Tn10	34
DV13	Same as EC8 but mutD5 zaf-13::Tn10 lexA3 (Ind−)	34
Plasmids
pRW154	Low-copy-number plasmid expressing umuDC; Spcr	31
pRW134	Low-copy-number plasmid expressing umuD′C; Spcr	31
pRW144	Low-copy-number plasmid expressing mucAB; Spcr	31
pRW294	Low-copy-number plasmid expressing mucA′B; Spcr	31