Xylanase
Xylanase (endo-1,4-β-xylohydrolase) is a hydrolytic enzyme that involved in depolymerisation of xylan. Partial characterization of an extracellular xylanase isolated by chromatography from Bacillus subtilis gave a molecular weight of 32,000 and optimum pH and temperature of 5.0 and 50°C, respectively. -https://www.ncbi.nlm.nih.gov/pmc/articles/PMC239434/pdf/aem00165-0223.pdf
COMMERCIAL IMPORTANCE
This enzyme used in vast industrial processes such as bio-bleaching of kraft pulp, digestibility of animal feed, softening of fruits, beer and juice clarification, extraction of plant oils, bioconversion of agricultural wastes and degumming of plant fibers .
Over the last few years, industries in worldwide have gained a lot of attention and interest on the production of xylanase due to their bio-bleaching potential.
The main important use of this xylanase enzyme is removal of lignin.The removal of the lignin fraction occurs in two stages involving kraft process and chemical bleaching. The kraft process involves the cooking of the wood chips at high alkaline pH and temperature, some parts of the xylan are then dissolved while the remained of other short-chain xylans precipitate in crystalline form on the surface of cellulose microfibrils.
The other advantages including ease genetic and environmental manipulation that are able to increase the yield of bacteria cells .
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