Immunogen sequence: SRDNLLHQQM LQSEIQAMKK LRHKHILALY AVVSVGDPVY IITELMAKGS LLELLRDSDE KVLPVSELLD IAWQVAEGMC YLESQNYIHR DLAARNILVG ENTLCKVGDF GLARLIKEDV YLSHDHNIPY KWTAPEALSR GHYSTKSDVW SFGILLHEMF SRGQVPYPGM SNHEAFLRVD AGYRMPCPLE CPPSVHKLML TCWCRDPEQR PCF