PLS1 and cervical cancer: We assessed the protein levels of these 11 genes (PRAME, HMGA2, SBK1, ETV4, MEX3A, PLS1, TM7SF2, PYCR1, SLC19A1, TTYH3, and NIPSNAP1) in HPV-negative and HPV-positive cervical cancer cell lines using western blotting.