CTCF and lung adenocarcinoma: DNase-Seq and ATAC-Seq data, which indicate chromatin accessibility to transcription factors; ChIP-Seq data for CTCF; POLR2A; H3K4me3, which indicate active gene transcription; and H3K27ac, which indicates active enhancers, were available in the ENCODE database for the liver and lung tissues, and for the A549 lung adenocarcinoma cell line.