6.3.4.21	additional information	-	thermostability of the enzyme is increased by ATP and 5-phospho-alpha-D-ribose 1-diphosphate	637763	
6.3.4.21	50	-	5 min: 95% loss of activity, MgATP2-, Mg-phosphoribose diphosphate, ATP, GTP or nicotinic acid protect, with 27%, 37%, 52%, 54% or 61% loss of activity, respectively. 10 min: 97% loss of activity, MgATP2-, Mg-5-phospho-alpha-D-ribose 1-diphosphate, ATP, GTP or nicotinic acid protect, with 43%, 52%, 60%, 63% or 69% loss of activity, respectively	637750