,15,37, 38, 39 SLC3A1, an auxiliary subunit of the rBAT–b (0,+)AT1 (SLC7A9) transporter system, is linked to the capacity of breast cancer cells to maintain their redox state by promoting the accumulation of reduced GSH, thereby decreasing lipid peroxide levels and maintaining cell survival.40 This evidence concerns the gene SLC3A1 and breast carcinoma.