Appearance: White lyophilizate
Solubility: Clear, colorless solution in water (c=10 mg/ml)
pH value (c=10 mg/ml): 6.8-7.4
Activity (+37°C, 4-NP-α-D-glucoside): ≥60 U/mg lyophilizate
Specific activity: ≥130 U/mg protein
Protein (Biuret): 25-45 mg/100 mg lyophilizate
Contaminants (expressed as percentage of α-Glucosidase activity):
α-Amylase: ≤0.00001
Stability: At -15 to -25°C within specification range for 12 months. Store dry.