MSL2 isolatewas cultured in 1 L of CMC broth and incubated at 50°C for 48 h in a shaker incubator. The culture was centrifuged at 8000 rpm for 20 min at 4°C and supernatants were collected as crude cellulase enzyme. Ammonium sulfate salt was added into crude cellulase enzyme to achieve 80% saturation. The mixture was left overnight at 4°C. Pellet was collected by centrifuged at 10,000 rpm for 20 min at 4°C, and dissolved in 10 mL of 50 mM sodium phosphate buffer (pH 5.0) for dialysis using Float-A-Lyzer dialysis membrane (Spectrum Lab) with 10 kDa MWCO. Dissolved pellet was dialyzed against 50 mM sodium phosphate buffer (pH 5.0) at 4°C with three changes of buffer