Estrogen receptor refers to a group of receptors that are activated by the hormone 17β-estradiol (estrogen). Two types of estrogen receptor exist: ER which is a member of the nuclear hormone family of intracellular receptors and the estrogen G protein coupled receptor GPR30 (GPER), which is a G-protein coupled receptor. This article refers to the nuclear hormone receptor ER.
The main function of the estrogen receptor is as a DNA binding transcription factor that regulates gene expression. However, the estrogen receptor has additional functions independent of DNA binding.
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