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Title

Improvement of protease production by Chryseobacterium indologenes BYK27 and its application in de-colorization of blood on clothes

Pages

 Start Page 101 | End Page 112

Abstract

 Protease is one of the most important industrial enzymes occupying nearly 60% of global enzyme sales. Extracellular Protease finds numerous applications in industrial processes like in leather tanning, detergents, dairy, brewery as well as meat tenderization industries. In spite of that, the low level of enzyme production is the main challenge of industrial production of enzyme. Therefore, Optimization of industrial Protease production and its application in blood de-staining were the aims of this study. The sewage samples were cultivated on the skim milk agar. BYK27 isolates with the highest clear halo around the colonies were selected for further studies. Optimization of parameters affecting Protease production by Chryseobacterium indologenes BYK27 was studied by Taguchi approach. De-staining ability of Protease was also investigated by de-colorization of bloody cotton cloth. The optimal factors for Protease production by Ch. indologenes BYK27 were found to be the temperature of 40 ˚ C, pH of 9. 0, 0. 06% yeast extract and 1% glucose supplements. Protease production under optimal condition was found to be 590 (U/ml) which was improved by 63%, as compared to the basal medium. The Protease activity and stability were increased 50% by beta-mercaptoethanol but inhibited about 88% by DMF. In addition, BYK27 Protease was able to completely de-stain blood after 20 min of incubation. The results of this study indicate that BYK27 Protease has biotechnological potential, specifically in the detergent industry and provision of valuable compounds.

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