Immunogen sequence: SDRPRGRDPV NPEKLLVITV ATAETEGYLR FLRSAEFFNY TVRTLGLGEE WRGGDVARTV GGGQKVRWLK KEMEKYADRE DMIIMFVDSY DVILAGSPTE LLKKFVQSGS RLLFSAESFC WPEWGLAEQY PEVGTGKRFL NSGGFIGFAT TIHQIVRQWK YKDDDDDQLF YTRLYLDPGL REKLSLNLDH KSRIFQNLNG ALDEVVLKFD RNR