2.3.1.39	A197D	site-directed mutagenesis, reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	E20A	mutant retains activity	705648	
2.3.1.39	F187A	site-directed mutagenesis, the mutant shows loss of about 65-70% activity compared to the wild-type enzyme	735606	
2.3.1.39	F198S	mutant shows a reduction in activity	719494	
2.3.1.39	F200A	site-directed mutagenesis, highly reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	F200S	site-directed mutagenesis, highly reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	F200Y	site-directed mutagenesis, reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	G198A	site-directed mutagenesis, reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	G198Y	site-directed mutagenesis, highly reduced activity compared to the wild-type enzyme	661061	
2.3.1.39	H188A	site-directed mutagenesis, inactive mutant	735606