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Concentration-response curve of transcriptional activation by Cynanchum wilfordii Hemsley, Phlomis umbrosa Turczaninow, and Angelica gigas Nakai extracts (CPAE) using HeLa9903 cells. Estradiol (E2, 10−13.6–10−7.6 g/L, 10−4–102 pM), genistein (10−8.6–10−2.6 g/L, 10−6–10 μM), and CPAE (10−7–10−1 g/L). Cells were harvested and assayed for luciferase activity. All experiments were performed in triplicate. Bars represent mean ± SD.
