Immunogen sequence: MEEECRVLSI QSHVIRGYVG NRAATFPLQV LGFEIDAVNS VQFSNHTGYA HWKGQVLNSD ELQELYEGLR LNNMNKYDYV LTGYTRDKSF LAMVVDIVQE LKQQNPRLVY VCDPVLGDKW DGEGSMYVPE DLLPVYKEKV VPLADIITPN QFEAELLSGR KIHSQEEALR VMDMLHSMGP DTVVITSSDL PSPQGSNYLI VLGSQRRRNP AGS