Ebf1 deficient cells were fixed 1% formaldehyde, followed by quenching with 125mM of glycine. The cells were washed with ice-cold PBS and were lysed. The crosslinked chromatin was shared with a Bioruptor Sonicator (CosmoBio) and target protein-DNA complexes were isolated with antibody. ChIP-seq libraries were prepared from 1~3 ng of ChIP DNA with the use of Ovation Ultralow DR Multiplex System (Nugen). The DNA libraries were clonally amplified on a flow cell and sequenced on HiSeq2500 (HiSeq Control Software v2.2.38, Illumina) with 51-mer paired-end sequence. Image analysis and base calling were performed using Real-Time Analysis Software (v1.18.61, Illumina).