Indeed, examination of panels of human breast cancer cell lines have found that xCT/SLC7A11 promotes glutamate secretion, providing further evidence that xCT/SLC7A11 can promote glutamine catabolism in cell types beyond NSCLC (Briggs et al., 2016; Timmerman et al., 2013). The gene discussed is SLC7A11; the disease is non-small cell lung carcinoma.