Comparing the gene expression between normal breast epithelial cells and four types of breast cancer cells, it was found that all four different types of breast cancer cells exhibited differential expression of theHERV-K_1q23.3, SLAMF1, HERV-K_22q11.23, IGLL1, HERV-K_9q34.11 and LRRC8A. Here, IGLL1 is linked to breast carcinoma.