Table 1.

The effect of carbon source additives on keratinase production by B. licheniformis ALW1.

Carbon source additives (0.1%)	Keratinase activity
	(U/ml)	(%)
None*	33.22 ± 0.77	100.0
Glucose	35.06 ± 0.07	105.5**
Galactose	36.63 ± 0.54	110.3**
Mannose	34.82 ± 0.48	104.8
Sucrose	34.64 ± 0.39	104.3
Dextrin	33.76 ± 1.18	101.6
Soluble starch	34.83 ± 0.20	104.8

(^**) mean that this value is significantly different when compared to control (^*) at 95 % confidence level.