ChIP experiments were performed in 3T3-L1 cells essentially as previously described (Siersbæk et al. 2012, MCB, 32: 3452-3463). For cross-linking of chromatin, 0.2 mM disuccinimidyl glutarate (DSG) was applied (Proteochem, Denver, CO) for 45 min followed by cross-linking using 1% formaldehyde for 10 min. ChIP-seq libraries were constructed according to the manufacturer's instructions (Illumina) as described in (Nielsen R, Mandrup S, 2014 Genome-Wide Profiling of Transcription Factor Binding and Epigenetic Marks in Adipocytes by ChIP-seq. Methods in Enzymology 2014, Vol. 537, pp. 261-279).