Western blot analyses of untreated and IFN-γ-treated HEK293T cells as well as of the 10 RCC cell lines using the anti-HLA-E antibody MEM-E/02 demonstrated a more pronounced HLA-E expression upon IFN-γ stimulation when compared to staining with the TFL-033 mAb. Here, HLA-E is linked to renal cell carcinoma.