Lysates were clarified from sonicated nuclei and histone-DNA complexes were isolated with antibody. Purified ChIP DNA was end repaired, end adenylated, and then ligated with Illumina Truseq indexed adaptors. The ligated DNA was purified with AMPure XP beads (Beckman Coulter) and then amplified with KAPA HiFi DNA Polymerase (KAPA Biosystems) for 8 to 13 cycles. After amplification, the library DNA was size selected with AMPurex XP beads to 200-600 bp range.