EC 3.2.1.26 From yeast. 

Chromatographically purified. 

In 50% glycerol. 

Specific activity: 900 U/mg protein (40°C, pH 4.5, 1 % sucrose). 2000 U/ml. 

Contaminants: α- and β-galactosidase < 0.001%, α- and β-glucosidase < 0.001 %. 

Stable at 4°C for > 4 years.