The invention provides a DAX-1 protein molecule having the amino acid sequence beginning with methionine at position 1 and ending with isoleucine at position 470 as shown in FIG. 12. The invention further provides the genomic nucleic acid sequence for DAX-1, including intron, exons and a promoter region. Additionally, the invention provides methods for using and making the DAX-1 protein and DAX-1 nucleic acid molecules.