Effect of oxygenation and temperature on glucose-xylose fermentation in Kluyveromyces marxianus CBS712 strain

Table 2 Xylose reductase ( Km XR) and xylitol dehydrogenase ( Km XDH) activities

Inlet oxygen (%)	Time (h)	Enzyme activity (U mg⁻¹)		Enzyme activity (U mg⁻¹)
Inlet oxygen (%)	Time (h)	XR	XDH	XR	XDH
20.95	16	6,4	45,2	6,6	39,0
	23	7,4	43,9	6,1	37,9
	40	8,5	47,6	5,0	37,1
1.75	16	3,6	13,7	3,5	4,2
	23	2,3	22,3	4,6	6,3
	40	4,3	37,0	5,9	7,6

Xylose reductase (Km XR) and xylitol dehydrogenase (Km XDH) activities of K. marxianus CBS712 grown at 30°C and 41°C under different inlet oxygen concentrations: 20.95% (a) and 1.75% (b) are average values of two replicates where the deviation from the mean value was always less than 3%.

ISSN: 1475-2859