The DNA-associated protein encoded by this gene is a member of the paired family ofhomeobox proteins localized to the nucleus. The protein functions as atranscription coactivator, enhancing the DNA-binding activity ofserum response factor, a protein required for the induction of genes by growth and differentiation factors. The protein regulates musclecreatine kinase, indicating a role in the establishment of diversemesodermal muscle types. Alternative splicing yields two isoforms that differ in abundance and expression patterns.[6]
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