The highest SLFN-11 expression level was found in MDA-MB-468 triple-negative breast cancer (TNBC) cells, which was more than 10-fold higher compared to MCF-7 hormone receptor-positive (HR+) breast cancer cells and at least 300-fold higher compared to the other breast (cancer) cell lines. The gene discussed is NR4A1; the disease is triple-negative breast carcinoma.