Table 1.

Comparison of ethanologenic E. coli strains.

Strain	Genotype	Ethanol yield (g/g)	Ethanol yield %	Reference
KO3	pfl+ pfl:(pdc+ adhB+ CmR)	0.13 g/g glucose	26	Ohta et al. (1991)
KO4	KO3, selected for high CmR	0.56 g/g glucose	>100a	Ohta et al. (1991)
KO11	KO4 frd	0.54 g/g glucose	>100a	Ohta et al. (1991)
KO11	KO4 frd	0.46 g/g xylose	89	Yomano et al. (1998)
LY01	KO11, selected for high ethanol tolerance	0.44 g/g glucose	85	Yomano et al. (1998)
LY01	KO11, selected for high ethanol tolerance	0.47 g/g xylose	92	Yomano et al. (1998)
LY 160	KO11, Δfrd:celYEc ΔadhE ΔldhA ΔackA lacA:casABKo rrlE:(pdcZm-adhAZm-adhBZm-FRT-rrlE) pflB+	0.49 g/g xylose	95	Yomano et al. (2008)
AH003	KO11, ΔldhA ΔpflA	0.54 g/g glucose	>100a	Hildebrand et al. (2013)
AH003	KO11, ΔldhA ΔpflA	0.35 g/g gluconate	98	Hildebrand et al. (2013)
SZ420	ΔfrdBC ΔldhA, ΔackA ΔfocA-pflB ΔpdhR:pflBp6-pflBrbs-aceEF-lpd	0.45 g/g glucose	90	Zhou et al. (2008)
TCS083	Δzwf Δndh ΔscfA ΔmaeB ΔpoxB ΔldhA ΔfrdA Δpta:Kan−, carrying plasmid with pdcZm and adhBZm	0.48 g/g glucose	94	Trinh et al. (2008)
TCS083	Δzwf Δndh ΔscfA ΔmaeB ΔpoxB ΔldhA ΔfrdA Δpta:Kan−, carrying plasmid with pdcZm and adhBZm	0.49 g/g xylose	96	Trinh et al. (2008)
TCS099	Δzwf Δndh ΔscfA ΔmaeB ΔpoxB ΔldhA ΔfrdA Δpta Δmdh:Kan, carrying plasmid with pdcZm and adhBZm	0.37 g/g glycerol	74	Trinh and Srienc (2009)
TCS099	Δzwf Δndh ΔscfA ΔmaeB ΔpoxB ΔldhA ΔfrdA Δpta Δmdh:Kan, carrying plasmid with pdcZm and adhBZm evolved with metabolic evolution in glycerol/tetracycline	0.49 g/g glycerol	98	Trinh and Srienc (2009)

^aHigher ethanol titers were reached due to ethanol production from the catabolism of complex nutrients. The yield was calculated on initially added sugar.