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RIPA lysis buffer

Sodium Chloride ---------------- 150 mM
NP-40 ----------------------- 1%
Tris, pH 8.0 ------------------ 50 mM
Sodium deoxycholate --------------- 0.5%
SDS ---------------------- 0.1%

RIPA buffer is a more denaturing lysis buffer than NP-40. It contains nonionic detergent
NP-40, and two ionic detergents sodium deoxycholate and SDS.