Fig. 4
Growth and product formation of the mutant strains on cellobiose. a Growth properties measured by optical density (OD680nm), b acetate production, and c ethanol production of C. bescii mutant strains on 1 % cellobiose as a sole carbon source at 75 °C; black circles, JWCB017; red squares, JWCB049; blue triangles, JWCB054. d Hydrogen produced by each strain at the end of fermentation (48 h); black bars, JWCB017; red bars, JWCB049; blue bars, JWCB054. Error bars based on two biologically independent experiments