Flow cytometry was used to measure CD95 levels on the surface of live tumour cells after 24 hour culture with drugs at previously reported equi-active cytotoxic concentrations: CPM – 100 μM for all cell lines, OXP – 1 μM for A459 and HCT116 cells and 0.6 μM for MCF-7 cells and GEM – 1 μM for A549, 0.6 μM for HCT116 cells and 0.3 μM for MCF-7 cells19. This evidence concerns the gene FAS and neoplasm.