EC 3.2.1.41 From Bacillus licheniformis. Electrophoretically homogeneous (MW 105,000). In 3.2M ammonium sulphate. Specific activity: ~ 75 U/mg (40°C, pH 5.0, pullulan as substrate). Contaminants: α-glucosidase < 0.001%, α-amylase < 0.01%. Stable at 4°C for > 4 years.