From Proteopedia

The androgen receptor (AR) belongs to the steroid hormone group nuclear receptor family with the estrogen, progesterone, glucocorticoid and mineralcorticoid receptor. AR mediate the actions of testosterone (T) and a more biologically active form, 5α-dihydrotestosterone (DHT), which are the male sex hormones required for development of the male reproductive system and secondary sexual characteristics. This receptor, located on the X chromosome, is expressed in a diverse range of tissues, because they have significant biological actions in many systems ^[1]. There are other androgens that bind with much less potency than T and DHT such as androstenedione, androstenediol, and dehydroepiandrosterone (DHEA) ^[2].

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