The present invention provides novel polynucleotides encoding HGRA4
polypeptides, fragments and homologues thereof. The present invention
also provides novel polynucleotides encoding a HGRA4 splice variant,
HGRA4sv. Also provided are vectors, host cells, antibodies, and
recombinant and synthetic methods for producing said polypeptides. The
invention further relates to diagnostic and therapeutic methods for
applying these novel HGRA4 and HGRA4sv polypeptides to the diagnosis,
treatment, and/or prevention of various diseases and/or disorders related
to these polypeptides. The invention further relates to screening methods
for identifying agonists and antagonists of the polynucleotides and
polypeptides of the present invention.