3.4.21.25	-20°C, 10 days, 1.3% loss of milk-clotting activity	
3.4.21.25	25°C, 10 days, 37% loss of milk-clotting activity	
3.4.21.25	25°C, 3 weeks, 95.4% loss of milk-clotting activity	
3.4.21.25	4°C, 10 days, 85.4% loss of milk-clotting activity	
3.4.21.25	4°C, 3 weeks, 20% loss of milk-clotting activity	
3.4.21.25	lyophilization causes a loss of activity of more than 10%	
3.4.21.25	very stable in a frozen solution, no loss of activity after one year