Fig. 5From: Bacillus sp. CSK2 produced thermostable alkaline keratinase using agro-wastes: keratinolytic enzyme characterizationa Effect of temperature (30 – 80 °C) on keratinase activity. The optimal temperature for keratinase activity was determined to be in the range of 60 – 80 °C. b Determination of the thermostability of keratinase after 2 h of preheating at 50 °C, 60 °C and 70 °CBack to article page