Immunogen sequence: SLHGFSSSED ALEYYKPSTT LDGTNKLCQF SPVQELSEQT PETSPDKEEA SIPKKLQTAR PSDSQSKRLH SVRTSSSGTA QRSLLSPLHR SGSVEDNYHT SFLFGLSTSQ QHLTKSAGLG LKGWHSDILA PQTSTPSLTS SWYFATESSH FYSASAIYGG SASYSAYSCS QLPTCGDQVY SVRRRQKPSD RADSRRSWHE ESPFEKQFKR RSC