1.13.11.5	10% acetone stabilizes	396333	
1.13.11.5	ascorbate stabilizes, it probably protects Fe2+ from spontaneous oxidation	439393	
1.13.11.5	rather stable enzyme, can be repeatedly thawed and frozen without significant loss of activity	439389	
1.13.11.5	unlike the mammalian enzyme, the bacterial enzyme is fairly stable on aging or during storage	396333, 439380