The DNA-associated protein encoded by this gene is a
member of the paired family of homeobox proteins localized to the
nucleus. The protein functions as a transcription co-activator,
enhancing the DNA-binding activity of serum response factor, a
protein required for the induction of genes by growth and
differentiation factors. The protein regulates muscle creatine
kinase, indicating a role in the establishment of diverse
mesodermal muscle types. Alternative splicing yields two isoforms
that differ in abundance and expression patterns. [provided by
RefSeq].
