(e) C-Cas 8 preferentially localizes at p62 aggregation foci. MEFs were treated with DMSO or 1 μM TP for 24 h, and then co-stained with an anti-p62 antibody and an anti-cleaved caspase-8 antibody. The C-Cas 8 fluorescence signals are triggered in NRBF2 KO MEFs treated with TP and preferentially localize at p62 aggregation foci. Scale bars, 20 μm. This is a representative image from three independent experiments. 