IM-0223 cells (2 × 104 cells) were incubated in 8-well chamber slides (Thermo Fisher Scientific), and stained for immunofluorescence as previously described (28 (link)), using the following Abs: mouse anti-human KPC1 Ab (1:50 dilution, #ab57549; Abcam), rabbit anti-human NF-κB1 p50 Ab (1:50 dilution, #sc-114; Santa Cruz Biotechnology), Alexa Fluor 488-conjugated goat anti-mouse IgG (2.5 μg/ml, #115-545-003, Jackson ImmunoResearch, West Grove, PA) or Cy3-conjugated goat anti-rabbit IgG (2.5 μg/ml, #111-165-003, Jackson ImmunoResearch). The slides were stained with 4′,6-diamidino-2-phenylindole (DAPI, Thermo Fisher Scientific) in mounting medium. Images were obtained using a Nikon Eclipse Ti microscope and NIS elements software (Nikon).