pLenti vectors expressing either Keima-YIPF4, Keima-YIPF3, or GALNT2-Keima were packaged in 293T cells and the lentivirus was used to infect WT or FIP200-/- HEK293 cells (for Keima-YIPF3 and Keima-YIPF4). GALNT2-Keima was used to infect WT, FIP200-/- and DKO (YIPF3-/-, YIPF4-/-) HEK293 cells. To create stable cell lines, infected cells are selected in 1 µg/mL of puromycin for 48 hours, followed by 48 hours of recovery.