Immunogen sequence: LVLGSCRALE VANGTVTSLP GATVTLICPG KEAAGNVTIH WVYSGSQNRE WTTTGNTLVL RDVQLSDTGD YLCSLNDHLV GTVPLLVDVP PEEPKLSCFR KNPLVNAICE WRPSSTPSPT TKAVLFAKKI NTTNGKSDFQ VPCQYSQQLK SFSCQVEILE GDKVYHIVSL CVANSVGSKS SHNEAFHSLK MVQPDPPANL VVSAIPGRPR WLK