Fig. 4

Heterologous expression and substrate utilization analysis of the A. niger sugar transporters XltA-C and T. reesei sugar transporters Str1-3. Ag11C3 transformants expressing str1, str2, str3, xltA, xltB or xltC were grown for 7 days at 30 °C in minimal medium agar plates containing a final concentration of 1 % (w/v) or 0.1 % (w/v) of the following sugars: maltose, glucose, xylose, fructose, galactose and mannose. EV: Ag11C3, carrying the empty expression vector p426HXT7-6His. Insert str1 transformant grown for 12 days on xylose plates