Immunogen sequence: PIGSLNSNYG GSSLVASSRS ASMVGTHRED SVSLNGNHSV LSSTVTTSST DLNHKTQENY RGGLQSQSGT VVTTEIKTEN KEKDENLHEP PSSDDMKSDD ESSQKDIKVS SRGRTSSTNE DEDLNPEQKI EREKERRMAN NARERLRVRD INEAFKELGR MCQLHLKSEK PQTKLLILHQ AVAVILSLEQ QVRERNLNPK AACLKRREEE KVS