4.2.2.20	-18°C, 3 days, complete loss of activity	
4.2.2.20	25°C, 17 days, complete loss of activity, in presence of 1 M trehalose 85% residual activity after 21 days	
4.2.2.20	37°C, 10 days, presence of 1 M trehalose, 20% residual activity	
4.2.2.20	4°C, 21 days, 80% residual activity