Table 2.

Specific activities of different xylose isomerase and xylulokinase

	Specific activity (U mg−1 total protein)
	WT(pEKEx3-x)
	–	xylAEc	xylABs	xylAMs	xylAXc	xylAXc-xylBEc	xylAXc-xylBBs	xylAXc-xylBCg
Xylose isomerase	< 0.005	0.095 ± 0.010	0.023 ± 0.003	0.033 ± 0.007	0.090 ± 0.008	0.062 ± 0.004	0.026 ± 0.003	0.077 ± 0.010
Xylulokinase	0.013 ± 0.005	0.020 ± 0.000	0.024 ± 0.000	0.019 ± 0.000	0.021 ± 0.000	0.541 ± 0.063	0.020 ± 0.004	0.468 ± 0.018

All tests were carried out with crude extracts at 30°C.