TABLE 1.

E. coli strains used in this study

E. coli strains	Description	Source or Ref.
K12 MG1655	Wild type strain	Laboratory stock
DSH7	Parental strain	38
ΔkatEG	DSH19, DSH7 katE1, katG17::Tn10	38
ΔsodAB	DSH56, DSH7 φ(sodA′-′lacZ)49 Cmr, φ(sodB′-′kan)/Δ2Kmr)	38
BW25113	Parental strain	39
ΔiscS	BW25113 iscS::Kanr	39
ΔtonB	BW25113 tonB::Kanr	39
ΔiscR	BW25113 iscR::Kanr	39
ΔsufS	BW25113 sufS:Kanr	39
ΔrecA	BW25113 recA::Kanr	39