Effects of sodium arsenite on the proportion of sub-G₁ fraction of MT2, S1T, and Jurkat cells. MT2, S1T, and Jurkat cells were treated with 0, 1, 2, 5, or 10 μM sodium arsenite for 1, 2, or 3 days. The cells were then stained by propidium iodide (PI) and analyzed by flow cytometry. The proportion of sub-G₁ fraction of MT2 (A) and S1T (B) was higher than that of Jurkat cells (C) under the indicated concentrations of sodium arsenite and the indicated time. Each column and bar represents the mean ± SD of 3 independent experiments. (D) The sub-G₁ fraction of MT2, S1T, and Jurkat cells treated with sodium arsenite for 3 days was compared. Each column and bar represents the mean ± SD of 3 independent experiments. *P < .01.