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Human cancer cells exhibit differential sensitivity to the anti-proliferative activity of SsCEI 4. The effects of peptide on cell viability were assessed in cancer cell lines belonging to Group 1, exposed for 24 (A) and 48 h (B) to increasing concentrations of SsCEI 4. Data are normalized to the values obtained with the untreated cells and are expressed as means ± SD values of triplicate data from three independent experiments.
