TABLE 3.

Growth rates of E. coli mutants on glucose and xylose in minimal medium

Strain	Genotype	Transport systema	Specific growth rate (h−1)
			Glucose (−O2)	Xylose (−O2)	Xylose (+O2)
W3110	Wild type	Both	0.31	0.19	0.47
AH280	ΔxylG	XylE	0.30	0.03	0.25
AH280 (pAH291)	ΔxylG, p-xylE+	XylE	0.31	0.03	0.27
AH280 (pAH286)	ΔxylG, PCP6-xylE+	XylE	0.29	0.06	0.50
AH243	Δ(focA-pflB)	Both	0.23	NGb	0.47
AH243 (pAH286)	Δ(focA-pflB), PCP6-xylE+	Both	0.25	NG	0.46
AH243 (pAH291)	Δ(focA-pflB), p-xylE+	Both	0.25	NG	0.35
AH257	ΔxylE	XylFGH	0.31	0.15	0.43

^aTransport system represents either the XylFGH-ATP-dependent ABC transporter, XylE-xylose/H⁺ symport, or both.

^bNG, no detectable growth.