An equal amount of chromatin was immunoprecipitated at 4°C overnight with at least 1 µg of the following antibodies: C/EBP-β (sc-150X), p-C/EBP-β (T217) (sc-16993X), normal rabbit IgG (sc-2027)(Santa Cruz Biotechnologies) and RNA polymerase II (Clone CTD4H8)(Millipore).