3.5.4.5	5.5	9.5	stable for some hours at 4°C, rapid inactivation and precipitation of the enzyme occurs at pH lower 5	209492	
3.5.4.5	6.5	10.7	irreversible loss of activity at pH values below 4	209648	
3.5.4.5	6	9	reasonably stable in this range	209660	
3.5.4.5	3.5	10.5	deoxycytidine as substrate, beyond these extremes rapid inactivation	209661	
3.5.4.5	3	10.5	deoxycytidine as substrate, beyond these extremes rapid inactivation	209668