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Effect of PRFR on the HepG2 cells viability. The cells were treated with or without various concentrations (0–50 µg/mL) of PRFR for 48 h. The cell viability was determined using SRB assay. All assays were demonstrated in triplicate in three independent experiments and the mean ± standard deviations are shown. **** p < 0.0001 versus the control.
