Immunogen sequence: MNAETCVSYC ESPAAAMDAY YSPVSQSREG SSPFRAFPGG DKFGTTFLSA AAKAQGFGDA KSRARYGAGQ QDLATPLESG AGARGSFNKF QPQPSTPQPQ PPPQPQPQQQ QPQPQPPAQP HLYLQRGACK TPPDGSLKLQ EGSSGHSAAL QVPCYAKESS LGEPELPPDS DTVGMDSSYL SVKEAGVKGP QDRASSDLPS PLEKADSESN KGK