To further support the cJUN mediate the transcription of XRCC4 in ovarian cancer cells exposed to cisplatin, we perform a ChIP assay to monitor the endogenous binding of cJUN to XRCC4 promoter region in the chromosome in both A2780cisR and SKOV3cisR cell lines treated with cisplatin. The gene discussed is JUN; the disease is ovarian carcinoma.