Immunoprecipitation was conducted as previously described 62 (link), 63 (link). Protein extracts were resolved by SDS-PAGE and transferred to a nitrocellulose membrane (Bio-Rad) using standard techniques. The primary antibodies and concentrations used for Western blotting were: BAP1 (1:1000; Santa Cruz, sc-28383), SLC7A11 (1:5000; Cell Signaling Technology, 12691), tubulin (1:5000; Cell Signaling Technology, 2144), H2Aub (1:5000; Millipore, 05–678), H2A (1:5000; Millipore, ABE327), vinculin (1:10000; Sigma, V4505), FOXK1 (1:1000; Abcam, ab18196 ), FOXK2 (1:1000; Bethyl Laboratories, A301–730A), HCFC1 (1:1000; Bethyl Laboratories, A301–399A), OGT (1:1000, Cell Signaling Technology, 5368), KDM1B (1:1000; Abcam, ab193080), ASXL1 (1:1000; Santa Cruz, sc-293204), p53 (1:1000; Santa Cruz, sc-126), PARP (1:1000; Cell Signaling Technology, 9542), β-actin (1:4000; Abcam, ab8226), and V5 (1:2000; Sigma, A8012).