3.1.1.41	25°C, 1 month, more than 80% of the activity is retained	
3.1.1.41	25°C, pH 7, unbuffered solution, 3 weeks, little or no loss of activity	
3.1.1.41	4°C, stable for 1 year	
3.1.1.41	5°C, pH 8.0, immobilized enzyme, 2 years, 4% loss of activity