PELI1 and cervical squamous cell carcinoma: The results revealed that IR did not affect the PELI1 expression at both mRNA and protein levels in TE‐1, ECA‐109 and other two types of human squamous cell carcinoma cell lines SCC‐9 (tongue squamous cell line) and SiHa (cervical squamous cancer cell line) (Fig. S3A–D).