To verify the expression of ATP11b in mammary tissues of wild-type (WT) and Brca1-MSK mice, RNA from the WT mouse mammary gland, MT mammary gland, MT tumor-adjacent mammary gland, and tumor tissues from WT tumors, MT primary tumors, and MT metastatic tumors was extracted and sequenced. Here, BRCA1 is linked to metastatic neoplasm.