CFTR and colon carcinoma: Open chromatin profiles at the CFTR locus in BxPC‐3, Capan‐1 and NP31 cells were generated by ATAC‐seq (Figure 2) and compared to well‐characterised open chromatin maps in colon carcinoma (Caco‐2) and lung adenocarcinoma (Calu‐3) cells that we published earlier [16, 33].