FXYD2 and ovarian cancer: To verify the relationship between FXYD2 expression and Na+/K+-ATPase activity in OCCC, four ovarian cancer cell lines, including two OCCC cell lines with high FXYD2 expression (TOV-21G and IGROV-1) and two non-OCCC cell lines with low FXYD2 expression (SKOV3 and A2780), were used to analyze Na+/K+-ATPase activity.