1.1.5.12	-20°C, detergent-free enzyme is destroyed by freezing and thawing	
1.1.5.12	-90°C, 20% ethylene glycol, stable for at least 2 weeks	
1.1.5.12	0°C, 5 days, 80% residual activity	
1.1.5.12	4°C, stable up to 6 months