Fig. 4

Activities of crude enzymes from ΔPoxCxrB, ΔPoxNsdD, and ΔPoxKu70 after a shift from glucose to Avicel. Crude enzymes were produced by fungal strains grown in 2% Avicel as the sole carbon source. Enzymatic activity was measured 2, 3, and 4 days after the shift. *P ≤ 0.05 and **P ≤ 0.01 between the regulatory gene mutants and the parental strain ΔPoxKu70, assessed with Student’s t test. a Filter-paper cellulase (FPase) activity. b Endo-glucanase (CMCase) activity. c p-Nitrophenyl-β-cellobiosidase (pNPCase) activity. d Xylanase activity. e p-Nitrophenyl-β-glucopyranosidase (pNPGase) activity