Immunogen sequence: KSHSQELLKI KTEPVDMLGL LSCSSTVSVK EELSPVLCMA SRDVMGTKAF PGMLPMGMYG AHIPTMPSTG VPHSLVHNTL PMGMSYPLES SPISSPAQLP PKYQLGSTSY LPDKLPKVEV DSFLAELPGS LSLSSAEPQP ASPQPAAAAA LLDEALLAKS PANLSEALCA ANVDFSHLLG FLPLNLPPCN PPGATGGLVM GYSQAEAQPL LTT