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Official Full Name: paired related homeobox 1<br />Also known as: PMX1; PRX1; AGOTC; PHOX1; PRX-1<br />The DNA-associated protein encoded by this gene is a member of the paired family of homeobox proteins localized in the nucleus. The protein acts as a transcriptional coactivator, enhancing the DNA-binding activity of serum response factor, a protein required for growth and differentiation factor-induced genes. This protein regulates creatine kinase and has been shown to play a role in the establishment of various mesodermal muscle types. Alternative splicing produces two isoforms with different abundance and expression patterns.