Figure 1: Effect of NaB on cell proliferation in the Ca9-22, HSC-2, -3, and -4 cell lines. Cell proliferation was assessed by MTT assay after 24 h of treatment with several concentrations of NaB. The experiment was performed at least three times for Ca9-22 (A), HSC-2 (B), -3 (C), and -4 (D). Each bar represents the mean ± SD of three separate experiments in duplicate samples.