FIGURE 1.

Acute cytholethality of inorganic arsenic in RWPE-1 cells chronically exposed to low level arsenite (5 μm). After 48 h of acute exposure to various concentrations of sodium arsenite, the cells were harvested, the viable cells were counted, and the LC₅₀ values were derived from survival curves. The data are expressed as LC₅₀ and represent the means ± S.E. of three separate experiments. An asterisk indicates a significant difference (p ≤ 0.05) from control.