Fig. 4From: Bacillus sp. CSK2 produced thermostable alkaline keratinase using agro-wastes: keratinolytic enzyme characterizationa Effect of pH (5.0–12.0) on keratinase activity. The highest enzyme activity was obtained at optimum pH 8.0. b Determination of pH stability of keratinase after 4 h preincubation at pH 6.0, 7.0, 8.0 and 9.0Back to article page