Cell culture conditions are described in Supplemental Materials and Methods. Transient transfections were performed using miScript miR‐26a‐5p mimetic, inhibitor or control (Qiagen) or at 20 or 50 nM and Lipofectamine 2000 (Life Technologies, Carlsbad, CA) in human embryonic kidney (HEK293), HOK, PDL‐F and HeLa cells as previously described (Naqvi et al., 2018a (link), 2018b (link)). Red siGLO oligos (ThermoScientific) were used as transfection controls for every experiment. Transfection efficiency data are shown in Figure S1.