TABLE 1.

E. coli strains used in this study

Strain	Genotype	Relevant phenotype(s)	Reference
ZK126	W3110 ΔlacU169 tna2	Wild-type parental strain	Zambrano et al. (21)
SF2003	ZK126 polB::Spc	pol II-	Yeiser et al. (14)
SF2006	ZK126 dinB::Kan	pol IV-	Yeiser et al. (14)