Figure 6.

β-arrestin 2 interacts with cytosolic inhibitor of NF-κB (IκBα). Before and after stimulation with lipopolysaccharide (LPS) for 6 hr, cells were lysed and immunoprecipitated with anti-β-arrestin 2 antibodies. Western blotting analysis was performed using anti-IκBα antibodies (upper panel). The protein levels of GAPDH in equal amounts of lysates were used for control (lower panel).