Table 2.

Enzyme activities (U/(mg total protein)): reductases

Enzyme	Substrate		Strain
AR	D-XYLOSE	L-ARABINOSE
	0.70 ± 0.04	0.82 ± 0.01	TMB3662
	0.47 ± 0.05	0.53 ± 0.03	TMB3664
	0.67 ± 0.03	0.80 ± 0.07	TMB3665
ALXb	XYLITOLa	L-ARABITOLa
	11.20 ± 1.40	0.00	TMB3658
ALX	L-XYLULOSE
	3.01 ± 0.50		TMB3664
	0.00		TMB3665

b. NAD⁺ as a cofactor (reverse reaction). NADH was used as a cofactor for all other reactions.