Immunoprecipitation was performed as described previously (21 (link)). Briefly, RAW264.7 lysates were prepared in immunoprecipitation lysis buffer (20 mmol/L Tris-Cl, pH 8.0, 10 mmol/L NaCl, 1 mmol/L EDTA, 0.1% NP-40) containing a protease inhibitor cocktail (Sigma). Two micrograms of cell extracts were precleared with 50 µl of protein A/G-agarose (Thermo Fisher) at 4°C for 2 h, and the supernatant was incubated with the corresponding antibodies with gentle shaking at 4°C overnight, followed by the addition of 20 µl of protein A/G-agarose for another 1 h. The beads were washed and then resuspended in 30 µl of loading buffer and boiled for 5 min, followed by Western blot detection.
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