Immunogen sequence: LSDDTCSDEK IRMNRVVRNN LRVRLGDVIS IQPCPDVKYG KRIHVLPIDD TVEGITGNLF EVYLKPYFLE AYRPIRKGDI FLVRGGMRAV EFKVVETDPS PYCIVAPDTV IHCEGEPIKR EDEEESLNEV GYDDIGGCRK QLAQIKEMVE. The protein encoded by this gene is a member of a family that includ