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Cytotoxic effects of free rGelonin versus scFvCD133/rGelonin without PCI. Cytotoxicity was assessed in six different cell lines, including WiDr (a), HT29 (b), NIH/3T3 (c), U87 (d), MDA-MB-231 (e), and MCF-7 (f) by the MTT viability assay 72 h after incubation with increasing concentrations of rGelonin or scFvCD133/rGelonin. The data are the mean of two individual experiments. Some of the error bars are smaller than the symbol size. Error bars = S.E.
