ChIP experiments were performed as described previously (van Oevelen et al, 2008, PMID:20956564). DNA libraries of C/EBPa and C/EBPb enriched chromatin fragments were prepared using Illumina's reagents and instructions. All other libraries were prepared according to manufacturer’s instructions with some modifications (Asp et al, 2011, PMID: 21551099). All libraries were sequenced on the Illumina 2AAIIx sequencer except C/EBPa and PU.1 libraries generated 10, 30 and 60 minutes post induction and pax5 (0 hours) and Foxo1 (0 hours) that were sequenced using the Illumina Hiseq2000 sequencer.