3.6.1.28	W53A	2.5fold increase in catalytic efficiency	733393	
3.6.1.28	D37A	about 0.5% of wild-type catalytic efficiency	733393	
3.6.1.28	K11A	about 15% of wild-type catalytic efficiency	733393	
3.6.1.28	D147A	about 30% of wild-type catalytic efficiency	733393	
3.6.1.28	E81A	about 30% of wild-type catalytic efficiency	733393	
3.6.1.28	Y39A	about 30% of wild-type catalytic efficiency	733393	
3.6.1.28	Y79A	about 5% of wild-type catalytic efficiency	733393	
3.6.1.28	K193A	about 60% of wild-type catalytic efficiency	733393	
3.6.1.28	K85E	decreased solubility, reduced catalytic activity	667797	
3.6.1.28	K65A	more than 1000fold decrease in kcat value	733393