3.4.13.20	37	-	up to 8 h the activity remains within 97.5% of the initial value, thereafter the activity decreases slowly	
3.4.13.20	45	-	10 min, stable below	
3.4.13.20	50	-	10 min, 13% loss of activity	
3.4.13.20	50	-	30 min, pH 7.8, stable, thermostability improved by the presence of 0.25 mM MnCl2, stability is very poor in the presence of 0.25 mM cadmium or calcium	
3.4.13.20	55	-	10 min, 51% loss of activity	
3.4.13.20	60	-	10 min, complete inactivation