Table 3.

The activity of XR and XDH present in crude cell-free extract obtained from disrupted cells of C. sorokiniana ^a

	Induced		Non-induced
	D-xylose	D-glucose	D-xylose	D-glucose
XRb (U mg−1 protein)	0.021	ND	ND	ND
XDHc (U mg−1 protein)	0.026	ND	ND	ND

^aThe non-induced and induced algal cells were washed with sterile distilled water and re-suspended in 8 mg DCW per mL in 50 mL minimal medium supplemented with 5 mM KNO₃ and 40 mM D-xylose or D-glucose under light for 24 hours.

^bThe activity of XR was measured at pH 6.0 and 40°C with NADPH as a cofactor.

^cThe activity of XDH was measured at pH 8.0 and 40°C with NADP⁺ as a cofactor.

ND, Not detected.