1.7.7.1	C514S	almost complete loss of activity	394417	
1.7.7.1	C518S	almost complete loss of activity	394417	
1.7.7.1	G212S/L213T/Y214L/S217C/C220I/S221N	mutations mimic partially isoform SiRA	-, 742810	
1.7.7.1	G513A	increased Km for nitrite compared to the wild type enzyme	394417	
1.7.7.1	G513E	loss of most of the activity	394417	
1.7.7.1	G513V	loss of most of the activity	394417	
1.7.7.1	G519A	68% activity of wild type enzyme	394417	
1.7.7.1	G519E	8% activity of wild type enzyme	394417	
1.7.7.1	G519V	9% activity of wild type enzyme	394417	
1.7.7.1	K449Q	mutation does not affect enzymatic activity	726450