2.6.1.16 -18°C, little loss of activity after 1 week for lyophilized material after calcium phosphate gel treatment 2.6.1.16 -20°C, 0.6 M sucrose, 60% loss of activity after 45 days 2.6.1.16 -20°C, potassium phosphate buffer, pH 7.0, containing 1 mM EDTA, 1 mM DTT, 50% glycerol and 10 mM fructose 6-phosphate, fully stable 2.6.1.16 -25°C, 1 month, 15% activity loss, ammonium sulfate precipitated enzyme 2.6.1.16 -80°C, 3 months 2.6.1.16 -80°C, 50 mM Tris-HCl, pH 7.8, 200 mM NaCl, 1 mM fructose 6-phosphate, 2 mM tris(2-carboxyethyl)phosphine hydrochloride, 200 mM imidazole, 10% glycerol, stable for up to 12 months 2.6.1.16 0-2°C, potassium phosphate buffer, pH 7.0, 0.06 M L-glutamine, 0.01 M EDTA, stable for up to 3 or 4 weeks 2.6.1.16 4°C or -15°C, 8 days, 50% activity loss 2.6.1.16 4°C or 15°C, 50% loss of activity after 8 days 2.6.1.16 4°C, 25 mM potassium phosphate buffer, pH 7.5, 1 mM EGTA, 2 mM dithiothreitol, 500 mM sucrose, stable for up to 2 or 3 weeks