PDCD1 and cervical carcinoma: Since the regulatory activity of 3’ UTRs relies on the trans-acting factors such as RBPs and noncoding RNAs which vary across cell types, we tested the PD-1 3’ UTR in three other human cell lines: Jurkat (T lymphoblast), BEAS-2B (airway epithelium), and HelaS3 (cervical carcinoma) cells.