Chromatin immunoprecipitations were performed with cross-linked chromatin from 4 x 10 6 MCF7 cells grown in phenol red-free medium and 5% charcoal-stripped FBS for 4 d and either 5 μl of TH1L (D5G6W) Rabbit mAb or 2 μl of Normal Rabbit IgG #2729 using SimpleChIP ® Enzymatic Chromatin IP Kit (Magnetic Beads) #9003. The enriched DNA was quantified by real-time PCR using SimpleChIP ® Human PMAIP1 Intron 1 Primers #12558, human c-Myc intron 1 primers, and SimpleChIP ® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.