NRAS and melanoma: The genetic background of the cell lines tested should be also considered: some melanoma cells harbor activating BRAFV600E mutations (A375, M14, A2058, SK-MEL-5, SK-MEL-19, SK-MEL-28, UACC-62, UACC-257, 518A2, G-361, WM266) not present in other ones (B16, Sbcl2, CHL1, WM3211, SK-MEL-147, MeWo, RPMI-7932) (https://web.expasy.org/cellosaurus/), or harbor different mutations (i.e., NRAS, CDKN2A, TP53, TERT).