Immunogen sequence: MMEELHSLDP RRQELLEARF TGVGVSKGPL NSESSNQSLC SVGSLSDKEV ETPEKKQNDQ RNRKRKAEPY ETSQGKGTPR GHKISDYFEF AGGSAPGTSP GRSVPPVARS SPQHSLSNPL PRRVEQPLYG LDGSAAKEAT EEQSALPTLM SVMLAKPRLD TEQLAQRGAG LCFTFVSAQQ NSPSSTGSGN TEHSCSSQKQ ISIQHRQTQS DLT