Fig. 3
Acid (a) and solvent (b) profiles in pH-controlled anaerobic ABE fermentations using 1731(pIMP1) (hollow markers) and 1731(pITF1) (solid markers). Triangle, butyrate; hexagon, acetate; rectangle, butanol; circle, acetone; diamond, ethanol; asterisk, total solvents. All data are represented as mean ± s.d. (samples were collected from 3 independent bioreactor runs)