Melanoma cells were cultured for 36 or 72 h in the presence of different concentrations of baicalein and baicalin, and apoptosis was analyzed after staining with PE-labeled Annexin V and 7-AAD (BD Biosciences, San Diego, CA, United States) (Liu et al., 2015 (link); Dou et al., 2018 (link); Wang et al., 2018 ). Stained cells were analyzed on a FACSCalibur (BD Bioscience) and the data were analyzed with the FlowJo software (Tree Star, Ashland, OR, United States).
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