ChIP assays were performed using human osteosarcoma (U2OS) cells, the antibody against H3R17me2 (bs-53054R) and optimized PCR primer sets for qPCR. ChIP was performed using sheared chromatin from 1.6 million cells per ChIP reaction. A titration of the antibody consisting of 2, 5, 10 and 15 μl per ChIP experiment was analyzed. IgG (5 μg/IP) was used as negative IP control. The figures show the recovery, expressed as a % of input (the relative amount of immunoprecipitated DNA compared to input DNA after qPCR analysis). Left Figure: QPCR performed with primers for the GAPDH promoter and for exon 2 of the myoglobin gene. Right Figure: QPCR performed with primers for the promoter of the active ALDOA gene and for the coding region of the inactive MYOD gene.