4.6.1.17	D128A	less than 1% of wild-type activity	739551	
4.6.1.17	D17A	about 30% of wild-type activity	739551	
4.6.1.17	E112A	less than 1% of wild-type activity	739551	
4.6.1.17	E114A	less than 1% of wild-type activity	739551	
4.6.1.17	H77A	less than 1% of wild-type activity	739551	
4.6.1.17	K131A	less than 1% of wild-type activity	739551	
4.6.1.17	K21A	about 18% of wild-type activity	739551	
4.6.1.17	K51A	less than 1% of wild-type activity	739551