3.2.2.30	D198N	inactive	727008, 752041	
3.2.2.30	D199A	active-site mutant	726595	
3.2.2.30	D199A	inactive	726595	
3.2.2.30	D199N	active-site mutant	726595	
3.2.2.30	D199N	the mutant shows residual activity	726595	
3.2.2.30	E14Q	active-site mutant	726595	
3.2.2.30	E14Q	the mutant shows residual activity	726595	
3.2.2.30	E173Q	inactive	727044	
3.2.2.30	F104C/C186S	the mutations give an enzyme with steady-state kinetic properties similar to the native enzyme	727044