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Dose-dependent effect of DRB on bovine REC proliferation and viability. Cells were plated on plastic in medium with 0.5% (viability) or 10% (proliferation) serum containing various concentrations of DRB. The number of live cells was measured on day 6 with the MTS assay. Bars, mean ± SEM of results in two experiments in triplicate. DRB significantly lowered the number of cells in both serum concentrations. *P < 0.05 versus vehicle.
