Table 1.

Strains used in this study.

Strain	Descriptiona	References
E. coli DH5α	F−Φ80lacZΔM15 Δ(lacZYA-argF) U169 recA1 endA1 hsdR17 (rK−, mK+) phoA supE44 λ−thi-1 gyrA96 relA1	Woodcock et al., 1989
E. coli C41(DE3)	F-ompT hsdS(rB-mB-) dcm+ Tetr gal l (DE3) endA Hte [argU ileY leuW CmR]*]	Miroux and Walker, 1996
E. coli BL21(DE3)	E. coli B F− dcm ompT hsdS(rB− mB−) gal λ(DE3)	Studier and Moffatt, 1986
E. coli MS411	ilvG rfb-50 thi	M. Schembri, DTU, Denmark
E. coli CSH26Cm::LTL	TcR, CSH26 galK::cat::loxP-Tet-loxP	Lang et al., 2010
E. coli DY330	W3110 ΔlacU169 gal 490 ts λcl857 Δ (cro-bioA)	Yu et al., 2000
E. coli MS614	SmR, ilvG, rfb-50, thi, rpsL	Beutin and Achtman, 1979
E. coli M1174	sfrA+, P−, B1−, trp−, lys−, gal−, malA−, strR, Su−, Δ(lac)X74	Silverman et al., 1991

^aresistances; Tc^R, tetracycline; Sm^R, streptomycin; Cm^R, chloramphenicol.