Immunogen sequence: TCDVGVSSDD DKGAQAARGS SNASLKEEEC KEPLLFHSGD HYPLSDGDWS PLETTYPQTA CPKSDSELEV KPAESLLRSE SHMEWTWGGF PESTKVSKRE RSDHHPRTAT ITPSENTHFR VIPSEDNLIS EVEKDASMED TVCTIVKPKP RALGTQMSDP TSVAELLEPP LESTQISSML DADHLPNAAL AEAPSESKPA AKVDSPSKKK GVH