Immunogen sequence: VLTGCRVVLD DPKHIQLRDL LRELMEKRGL DSCLSFLDKK VPPCPRNFSA KLFCLAGRCA ATRAKLRPSM DEVLNTLEST QASLYFAEDP PTSLKSFRCP SPLFLENVPS IPVEDDESQN NNLLPSDEGL RIDRMTQKTP FECSQSEVMF LSLDKKPESK RNEEACNMPS SSCEESWFPK YIVPSQDLRP YKVNIDPSSE APGHSCRSRP VES