MTT assays of C8161 (3A, B-RAF and N-RAS wild type), UACC903 (3B, B-RAFV600E) and 1205Lu, (3C, B-RAFV600E) melanoma cells treated with different concentrations of Riluzole, Sorafenib, PLX4720 or the combination of the compounds at half of the concentration of each one alone. NT - No treatment; DMSO - Vehicle only treatment: Riluzole (Ril); Sorafenib (Sor); PLX4720 (PLX).