Cellulose is a fibrous, insoluble and crystalline polysaccharide
consisting of D-glucose residues linked by β-1, 4-
glucosidic bonds. Cellulose is the most abundant
biopolymer in nature and can be degraded to glucose
through the synergistical hydrolysis of three classes of
cellulase, including endo-β-1, 4-glucanase (EC3.2.1.4),
exoglucanase or cellobiohydrolase (EC3.2.1.91) and β-
glucosidase (EC3.2.1.21) (Sehnem et al., 2006). Glucose
from the hydrolysis of cellulose can be easily fermented
into useful products such as ethanol, lactic acid, single
cell protein and other value added products (Chandra et
al., 2009). Therefore, cellulases are industrially important
enzymes having application in diverse industries such as