To further assess the role of TRIM24 as a transcriptional co-activator of STAT3, we performed ChIP-quantitative-PCR (ChIP-qPCR) on ID1 using antibodies directed against TRIM24, STAT3 and H3K23ac to measure binding to the promoter of ID1 in LN229 GBM cells with or without EGFRvIII. The gene discussed is ID1; the disease is glioblastoma.