Chromatin immunoprecipitations were performed with cross-linked chromatin from K-562 cells and either p300 (D2X6N) Rabbit mAb or Normal Rabbit IgG #2729 using SimpleChIP<sup>®</sup> Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. The enriched DNA was quantified by real-time PCR using human STAT3 promoter primers, SimpleChIP<sup>®</sup> Human HNRNPA0 Promoter Primers #83602, and SimpleChIP<sup>®</sup> Human MYT-1 Exon 1 Primers #4493. 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.