Fig. 2From: Directed evolution and secretory expression of xylose isomerase for improved utilisation of xylose in Saccharomyces cerevisiaeGrowth and xylose consumption of three xylose-assimilating strains in YPX medium containing 2% xylose. a Cell growth, b xylose consumption, c SDS-PAGE and d XI activity of the extracellular and intracellular fractions of each strain after 72 h cultivation in YPX medium. The xylA protein band is indicated by an arrow. Mean values and standard deviations of triplicates are shown. *p < 0.03. Symbols: TFP3-XI (●), MFα-XI (▲), Intra-XI (○)Back to article page