Immunogen sequence: SEHAFQGPTS FHVIQTSSFT NSTWAQTQGS GWLDDLQIHG WDSDSGTAIF LKPWSKGNFS DKEVAELEEI FRVYIFGFAR EVQDFAGDFQ MKYPFEIQGI AGCELHSGGA IVSFLRGALG GLDFLSVKNA SCVPSPEGGS RAQKFCALII QYQGIMETVR ILLYETCPRY LLGVLNAGKA DLQRQVKPEA WLSSGPSPGP GRLQLVCHVS GFY