Figure 1

Effect of proteasome inhibitor on proliferation. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay of (a) MDA-MB231, (b) MCF7 and (c) SKBR3 breast cancer cells treated with different concentrations (4 to 18 nM) of Bortezomib and BU-32 for 48 hours. Results are mean of three independent experiments.