3.4.21.B52	50	-	enzyme can withstand 6 M urea	
3.4.21.B52	90	-	15 min, stable	
3.4.21.B52	90	-	completly stable up to	
3.4.21.B52	92	-	first-order thermal inactivation, half-life: 342 min	
3.4.21.B52	101	-	first-order thermal inactivation, half-life: 7 min