Protein was collected from cells as previously described (28 (link)). Membranes were blocked in intercept blocking buffer (Li-COR Biosciences). Immunoblotting was performed using mouse anti-FLAG M2 (Sigma-Aldrich), rabbit anti-Actin (Bethyl), or mouse anti-DCAF1 (Proteintech) for 1hr. Blots were incubated with secondary antibodies IRDye 800CW anti-Rabbit and IRDye 680RD anti-Mouse (Li-COR Biosciences) for 1 hr and then visualized using the Li-COR Odyssey M (Li-COR Biosciences).