Immunogen sequence: MHLEGRDGRR YPGAPAVELL QTSVPSGLAE LVAGKRRLPR GAGGADPSHS CPRGAAGQSS WAPAGQEFAS FLTKGRSHSS LPQMSSSRSK DSCFTENTPL LRNSLQEKGS RCIPVYHPEF ITAEESWEDS SADWERRYLL SREVSGLSAS ASSEKGDLLD SPHIRLRLSK LRRCVQWLKV. This gene encodes the human homolog