1.8.1.2	-15°C, 0.05 M potassium phosphate buffer pH 7.7, 0.1 mM EDTA, 2 years stable	
1.8.1.2	-15°C, 0.05 M potassium phosphate buffer pH 7.7, 10 mM EDTA, at least 6 months	
1.8.1.2	-15°C, reduced hemoprotein subunit or reduced flavoprotein subunit	
1.8.1.2	-20°C, 0.3 M phosphate buffer pH 7.3, 1 year stable stable	
1.8.1.2	4°C, 0.05 M potassium phosphate buffer pH 7.7, 0.1 mM EDTA, 1 month stable	
1.8.1.2	4°C, 0.3 M phosphate buffer pH 7.3, 1 week stable