The relative binding affinities (RBA) of four steroid hormonal drugs for estrogen receptors of uterine cytosol were detemined by competitive binding assay and shown to be in the following order: ethinyl ostradiol>estradiol>anordrin>danazol.

• 根据[~3H]E_2和E_R具有高度专一性及亲和力的特性,应用竞争性试验比较了炔雌醇(EE)、雌二醇(E_2)、双炔失碳酯(Anordrin)、丹那唑(D)与兔子宫胞液雌激素受体的相对结合亲和力;