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DAX1A gene (DSS-AHC critical region on the X chromosome, gene 1—formally known, per HUGO nomenclature, as NR0B1) located on chromosome Xp21.3 that encodes a protein containing a DNA-binding domain, which acts as a dominant-negative regulator of transcription mediated by the retinoic acid receptor. DAX1 also acts as an anti-testis gene by antagonising SRY.
DAX1 mutations cause both X-linked congenital adrenal hypoplasia and hypogonadotropic hypogonadism.
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DSSAbbrev. for Department of Social Security.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005