EC 3.2.1.2 CAZY Family: GH14 From barley flour. Crystalline. In 3.2 M ammonium sulphate. Specific activity: ca. 620 U/mg (40°C, pH 6.0, soluble starch as substrate).Contaminants: α-amylase < 0.00001%. Stable at 4°C for > 4 years. Powder enzyme form (5000°L) is for use in AACC and ASBC α-amylase assay procedures (see E-BARBP).