Fig. 3From: Construction of cellulose-utilizing Escherichia coli based on a secretable cellulaseGrowth curve, BGL activity and glucose accumulation of recombinant E. coli. The N20-Tfu expression strain was cultured in modified M9 medium supplemented with 20 g/L cellobiose as sole carbon source (a) and the Cel-Tfu expression strain supplemented with 20 g/L CMC (b). Circle markers glucose accumulation in the medium; triangle markers growth curve of the expression strains; square markers BGL activity of the secreted N20-Tfu and Cel-TfuBack to article page