Fig. 3

Inhibition of C. thermocellum cellulase. Cellulase enzyme activity assay with starting concentration of 1 g/L Avicel and reaction volume of 5 mL. Legend shows amount of enzyme in mg (cellulase)/g (Avicel) and the amount of spent broth added. The cellulase enzyme was prepared by concentrating the supernatant from a C. thermocellum fermentation on 20 g/L Avicel. a Dependence of activity on amount of added enzyme; b–d inhibition of cellulase activity with different amounts of added enzyme and broth