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The effects of EEPp on K562 leukemic cell proliferation. Cells (2.5×105/ml) were incubated in the absence (control) or presence of EEPp. (A) Cell proliferation by 3H-thymidine incorporation (0.2 μCi/well/24 h) after 24 h. (B) Cell growth curve. Viable cells were regularly counted using trypan blue dye exclusion. Results represent the mean ± SD of three independent experiments in triplicate. *p<0.05, **p<0.01 and ***p<0.001 relative to the control (Student’s t-test).
