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0.32 M sucrose
50 mM Tris-Cl (pH 7.5)
4 mM MgCl2
1 mM CaCl2
0.1 mM PMSF
Protease inhibitors, and in particular PMSF, are rather unstable in aqueous solutions. Therefore, PMSF should be added as late as possible, just before use.
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