Table 2.

Microorganisms used in this study.

Strain	Description	References
Streptomyces coelicolor L646	S. coelicolor M145 containing an integrated plasmid overexpressing wild-type atrA, which leads to hyper-production of actinorhodins	33
Staphylococcus aureus SH1000	Standard laboratory strain - derivative of strain 8325-4, with a functional rsbU gene reinstated	34,35
S. aureus JE2	Methicillin-resistant S. aureus USA300 strain	36
S. aureus KS100	SH1000 deficient in catalase (katA::Tn917)	19
S. aureus KC043	SH1000 deficient in alkyl hydroperoxide reductase and catalase (ahpC::tet, katA::Tn917)	19
S. aureus MHKA	SH1000 deficient in superoxide dismutase A (sodA::Tn917)	37
S. aureus MHKM	SH1000 deficient in superoxide dismutase M (sodM:: tet)	37
S. aureus MHKAM	SH1000 deficient in superoxide dismutases A and M (sodA::Tn917, sodM::tet)	37
Escherichia coli BW25113	Derivative of E. coli K12 strain BD792 and parent strain of the Keio collection	38,39
E. coli BW25113ΔacrAB	BW25113 deleted for AcrAB	38
E. coli BW25113ΔtolC	BW25113 deleted for TolC	38
Candida albicans CA-6	Clinical isolate	40