Immunogen sequence: YCEQKEWAMN VGDKKGKIVD AVIQEHQPSV LLELGAYCGY SAVRMARLLS PGARLITIEI NPDCAAITQR MVDFAGVKDK VTLVVGASQD IIPQLKKKYD VDTLDMVFLD HWKDRYLPDT LLLEECGLLR KGTVLLADNV ICPGAPDFLA HVRGSSCFEC THYQSFLEYR EVVDGLEKAI Y Highest antigen sequence identity