Table 3.

Test results for parental and mutant yeast ethanol production using xylose and glucose media.

Substratesa	Ethanol production performance	Yeast isolateb
		Sc	Ct	Fcs1	Fcs2	Fcs3	Fcs4	Fcs5
Xylose	Sugar consumption (g/L)	0.04	1.94	2.22	1.86	2.52	1.91	2.14
	Ethanol products (g/L)	0.00	0.32	0.32	0.39	0.24	0.39	0.24
	Substrate efficiency (%)	0.19	9.70	11.12	9.31	12.60	9.53	10.62
Glucose	Sugar consumption (g/L)	19.89	19.53	19.65	19.56	19.60	19.56	19.62
	Ethanol products (g/L)	7.34	6.94	6.94	7.02	7.02	7.02	7.02
	Substrate efficiency (%)	99.17	97.67	98.23	97.79	98.02	97.79	98.10

Notes:

^aThe concentration of substrates is 20 g/L fermented for 24 h,

^b(Sc) S. cerevisiae DBY1, (Ct) C. tropicalis KBKTI 10.5.1, (Fcs) mutans strain.