ChIP assays were performed as described [28 (link)], using antibodies: H3K4me2 (07-030, Millipore, Billerica, MA, http://www.emdmillipore.com/), LSD1 (sc-49291, Santa Cruz Biotechnology), Pit-1 (sc-442, Santa Cruz Biotechnology), and receptor-interaction protein 140 (RIP140; ab42126, Abcam). Primers used for ChIP assay are shown in Supporting Information Table S1.