Immunogen sequence: NQDKNFAFLE FRSVDETTQA MAFDGIIFQG QSLKIRRPHD YQPLPGMSEN PSVYVPGVVS TVVPDSAHKL FIGGLPNYLN DDQVKELLTS FGPLKAFNLV KDSATGLSKG YAFCEYVDIN VTDQAIAGLN GMQLGDKKLL VQRASVGAKN ATLSTINQTP VTLQVPGLMS SQVQMGGHPT EVLCLMNMVL PEELLDDEEY EEIVEDVRDE CSK