Figure 2. Relative luciferase activities of the 3 estrogenic components and biphenol-A (BPA). HMBP (a) and DMPA (b) showed significantly greater luciferase activity than the negative controls at a concentration = 1 µmol/L (*p < 0.05, shaded bars). BHT (c) showed significant differences (p < 0.05) from the controls at a concentration = 50 µmol/L (*p < 0.05, shaded bars), while BPA (d) showed estrogenicity at a concentration = 100 nmol/L (*p < 0.05, shaded bars). **The negative control contained D-MEM with 0.1% dimethyl sulfoxide.