10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 3 2011 (July - September) A novel feather-degrading lessThan i greaterThan Bacillus Sp lessThan /i greaterThan . was isolated from chick manure. The bacterium produces keratinolytic enzyme using chicken feather as a sole of carbon and nitrogen source. The effect of temperature, pH on keratinase production of this keratinolytic strain was studied. Maximum enzyme activities were obtained within 48 hrs (780U/ml) of cultivation. The optimal conditions for the keratinolytic activity were determined to be pH 9.0 and temperature 60°C; however the enzyme showed a broad range of pH between 5-10 and temperature 20°C -100°C. In addition, the lessThan i greaterThan Bacillus sp lessThan /i greaterThan was able to completely degrade within a period of 48 hrs.  Muthusamy Govarthanan, T.Selvankumar AND S.Arunprakash Feather, Keratinase, Degradation, Environment, Protein 259-265