3.1.3.75	C87A	involved in a non-essential intramolecular disulfide bond	706604	
3.1.3.75	C94A	involved in a non-essential intramolecular disulfide bond	706604	
3.1.3.75	D123N	site-directed mutagenesis, the mutant enzyme fragment shows reduced activity compared to the wild-type enzyme fragment	664211	
3.1.3.75	D203S	site-directed mutagenesis, inactive mutant enzyme fragment	664211	
3.1.3.75	D262E	low PChP activity	679380	
3.1.3.75	D262E	mutant shows activity less than 2% with respect to native recombinant enzyme	696420	
3.1.3.75	D265E	enzyme activity reduced to 30-35% of wild-type activity	679380	
3.1.3.75	D267E	low PChP activity	679380	
3.1.3.75	D267E	mutant shows activity less than 2% with respect to native recombinant enzyme and is not activated by Cu2+	696420	
3.1.3.75	D31E	protein expression, but no enzyme activity	679380