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Cellular viability was around 100% after exposure to different concentrations of H. procumbens root extract up to 10 mg/mL (A) or purified Harpagoside up to 1 mg/mL (B). Results are expressed as percentage of viability with respect to the control (cells in 1x HBSS containing 20 mM HEPES). Graph represents the mean ± SEM of triplicate samples from one representative assay.
