Immunogen sequence: DELPQSVLKW APSGSSCCEI AQFLVCAHSL AYDEKPNYQA LKKILNPHGI PLGPLDFSTK GQSINVHTPN SQKVDSQKAA TKQVNKAHNR LIEKKVHSER SAESCATWKV QKEEKLIGLM NNEAAQESTR RRQKYQESQE PLNEVNSFPQ KISYTQFPNS FYEPHQDFTS PDIFKKSRSP SWYKYTSTVS TGITDLESST GLWPTISQFT LSE