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Comparison of estrogenic activities of (A) (3β,5α,22E)-ergost-22-en-3-ol (4) and (B) 17β-estradiol (E2) in the absence or presence of ICI 182,780, as determined by cell proliferation measured by E-screen assay in MCF-7 cells. * Significant difference between untreated cells and cells treated with sample in the absence of ICI 182,780 (n = 3 independent experiments, p < 0.05, Kruskal–Wallis nonparametric test). Data are the mean ± SEM.
