Then, we used RT-PCR (Figure 6B) and WB (Figure 6C) to test GPX3 expression levels in ovarian cancer (Ovcar-4), breast cancer (MDA-MB-231, BT-549), colorectal cancer (Lovo, SW480) and gastric cancer (MKN45) cell lines were examined. The gene discussed is GPX3; the disease is ovarian cancer.