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Cytotoxicity of G5-RF2.5-MTX3.9 (7, 30 nM) in KB cells tested under various control conditions. (a) Effect on cell growth of PBS (control), G5-RF2.5-MTX3.9 (7, 30 nM), RF (30 μM), and a mixture of 7 (30 nM) and RF (30 μM), (b) Effect on cell growth of PBS, G5-RF2.5-MTX3.9 (7, 30 nM), G5-RF2.5 (6, 30 μM), and a mixture of 6 (30 μM) and 7 (30 nM). *The p value for each of the data set is <0.005 compared to PBS.
