Table 2.

Strains and plasmids used in this study

Strains	Genotype	Reference or source
MC4100	F- araD139 Δ(argF-lac)U169 ptsF25 deoC1 relA1 flbB5301 rspL150-	[38]
MC-NG	Like MC4100, but ΔfdnG	This work
MC-OG	Like MC4100, but ΔfdoG	This work
FM460	Like MC4100, but ΔselC	[34]
DHP-F2	Like MC4100, but ΔhypF	[17]
FTD147	Like MC4100, but ΔhyaB, ΔhybC, ΔhycE	[19]
CP1104	Like FTD147, but Δfnr	This work
JW1328	BW25113 Δfnr	[39]
JW3862	BW25113 ΔfdhE	[39]
JW3866	BW25113 ΔfdhD	[39]
JW1470	BW25113 ΔfdnG	[39]
JW3865	BW25113 ΔfdoG	[39]
Plasmids
pfdhE	pCA24N fdhE+	[39]
pfdhD	pCA24N fdhD+	[39]
pfdnG	pCA24N fdnG+	[39]
pfdoG	pCA24N fdoG+	[39]