TDG and melanoma: TDG knockdown seems to affect melanoma cells irrespective of TP53/BRAF/NRAS mutational status; in fact MEL501, Mull, and SK28 harbor a BRAF-V600E mutation, whereas Gerlach cells are NRAS mutant, and MNT-1 are wild type for both BRAF and NRAS. However, the mutational background of a given cell line may determine different responses to TDG knockdown; for instance, the S-phase arrest of SK28 cells, as opposed to the G2–M arrest of MEL501 and Mull cells, may be related to the fact that SK28 cells contain a TP53 mutation (L145R).