Immunogen sequence: IAKHGEPARV LCNKDPFTLK SSVYLSRLFP NSKFLLMVRD GRASVHSMIT RKVTIAGFDL SSYRDCLTKW NKAIEVMYAQ CMEVGKEKCL PVYYEQLVLH PRRSLKLILD FLGIAWSDAV LHHEDLIGKP GGVSLSKIER STDQVIKPVN LEALSKWTGH IPGDVVRDMA QIAPMLAQLG Y Highest antigen sequence identity