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Effect of PCa on cell survival and proliferation of CRC cells. Cell viability was determined by using an MTT assay after treatment for 24, 48, or 72 h with increasing concentrations of PCa. (a) HT-29, (b) CT26, (c) SVEC, and (d) MDCK cells. The percentage of cell viability was normalized to the control (100%). The results are expressed as mean ± SD.
