Figure 2.

Clonogenic assay of the effects of As₂O₃ on the proliferation of A549 and H460 cells. In vitro clonogenic assays showed that 10^-1 μM to 12.5 μM As₂O₃ inhibited the proliferation of A549 and H460 cells. Surviving fraction was calculated as (mean colony counts)/(cells inoculated) × (plating efficiency), where plating efficiency was defined as mean colony counts/cells inoculated for untreated controls.