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The chosen steroid hormones are the human sexual hormones. Estradiol and estriol are femail hormones (estrogens), testosterone is male hormone (androgen). The greatest difference in structure of these molecules is observed in the A-ring which in an estrogen molecule is aromatic and planar while in an androgen molecule the A-ring has a distorted 1α-sofa conformation (Fig. 1). The estrogen molecule...
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