Zebra finch aromatase gene expression is regulated in the brain through an alternate promoter.

Abstract

The learned singing behavior in songbirds is sex-steroid-dependent and sexually dimorphic. Estrogen plays a major role in masculinizing the song system in these songbirds. The songbird brain synthesizes large amounts of estrogen, which, in the case of zebra finches, have been found to enter the systemic circulation. Aromatase cytochrome P450 is the key… (More)

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