Firstly, cells that grew on glass coverslips were fixed and then permeabilized with 0.25% Triton X-100 for 10 min, blocked with 0.8% BSA for 1 h at room temperature. Next, cells were incubated with the primary antibody against p65 (Cell Signaling Technology) overnight at 4 °C and treated with appropriate secondary antibody. The nucleus was counterstained with DAPI. The experiment was performed as described previously [20 (link), 21 (link)].
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