1.7.2.5	-20°C, stable	
1.7.2.5	-20°C, stable for 2 months	
1.7.2.5	17°C, 0.1% laurylpropanediol-3-phosphorylcholine ether or 0.1% dodecylmaltoside, 8 days, 100% activity	
1.7.2.5	17°C, Triton X-100, 2 days, 100% activity	
1.7.2.5	4°C, 2 d, 50% activity, the inclusion of 0.01% 2-phenylethanol, 1 mM benzamidine and 100 nM pepstatin stabilizes