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>= 300,000 U/mg

0.05M Tris HCl pH 8.0 and 0.85 M NaCl (before lyophilizing)

MW ~59 kDa

At -20°C, it maintains the reported activity (≥ 300,000 U/mg) at least for 11 months. (Preliminary Data)

-20°C or lower

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