3.5.1.15	PEGylated forms of aspartoacylase (modified with PEG of 2 kDa, 5 kDa, 10 kDa, 20 kDa or 40 kDa) show similar activities to that of the native enzyme. The activity of PEGylated enzyme samples is monitored for 72 hours without observing a substantial loss in activity	720476	
3.5.1.15	pure enzyme extremely unstable	209000	
3.5.1.15	the Escherichia coli-expressed enzyme form is quite unstable, losing a significant fraction of its catalytic activity within 24 h	667727