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Inhibition rate of B6 and 5-Fu on the proliferation of HeLa cells. HeLa cells were treated with increasing doses of B6 for 72 h and cell proliferation was determined by the MTT assay. Results represent the mean ± SD, n= 3. 5-Fu, 5-fluorouracil; B6, N-(4, 5-dibromo-pyrrole-2-carbonyl)-L-amino isovaleric acid methyl ester; MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide.
