BRD4 and lung carcinoma: Moreover, analysis of six lung cancer cell lines (A549, H358, H441, H1299, H1435, and H1437) revealed that the mRNA and protein expression patterns of ISX, PCAF, and BRD4 were co‐expressed in lung cancer cells relative to those in human diploid lung fibroblasts (WI38; Fig EV1D and E).