the protein encoded by this gene is a member of the nr1 subfamily of nuclear hormone receptors. it is a dna-binding protein that can bind as a monomer or as a homodimer to hormone response elements upstream of several genes to enhance the expression of those genes. the specific functions of this protein are not known, but it has been shown to interact with nm23-2, a nucleoside-diphosphate kinase involved in organogenesis and differentiation.