Chromatin immunoprecipitations were performed with cross-linked chromatin from 4 x 10 6 F9 cells and either 5 μl of Nanog (D1G10) Rabbit mAb (Mouse Specific; ChIP Formulated) 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 ® Mouse Oct-4 Promoter Primers #4653, SimpleChIP ® Mouse XIST Intron 1 Primers #4659, and SimpleChIP ® Mouse RPL30 Intron 2 Primers #7015. 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.