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10 mM HEPES (pH 7.9)
300 mM KCl
1.5 mM MgCl2
0.05% Nonidet P-40 (NP-40)
Immediately before use, add:
0.5 mM PMSF (phenylmethylsulfonyl fluoride)
Protease inhibitor cocktail (1 tablet; Roche Applied Science 11836170001)
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