TABLE 2.

Characterization of strains 64H, KB6417, and KB6419

Strain	Activity			Doubling timea (h)
	Transportb (nmol/min/5 × 108 cells)		Galactokinase (nmol/mg of protein/min)
	Galactose	Lactose		Galactose	Lactose	Glucose
64H	3.4	3.5	150	2.2	2.2	1.8
KB6417	0	0	240	3.2	∞	3.2
KB6419	0	0	413	3.4	∞	3.4

^aDetermined by measuring the OD₄₂₀ of cultures growing in CTM supplemented with 0.5% carbohydrate. 

^bMeasured with 7.5 μM [¹⁴C]galactose or 15 μM [¹⁴C]lactose.