3.1.3.103	E56A	200fold decrease in catalytic efficiency	-, 738574	
3.1.3.103	R64A	loss of catalytic activity	-, 738574	
3.1.3.103	S37A	2fold decrease in catalytic efficiency	-, 738574	
3.1.3.103	T34A	20fold decrease in catalytic efficiency	-, 738574