We found abnormalities inATP1A1 (coding α1-subunit) andATP1A2 (coding α2-subunit) expression (Table 1) in breast cancer samples relative to their expression in normal breast tissue.ATP1A1 was overexpressed approximately 1.5 times in all groups of breast cancer samples (p<0.05). The gene discussed is ATP1A1; the disease is breast carcinoma.