Immunogen sequence: AMEGYEVTTM DEACQEGNIF VTTTGCIDII LGRHFEQMKD DAIVCNIGHF DVEIDVKWLN ENAVEKVNIK PQVDRYRLKN GRRIILLAEG RLVNLGCAMG HPSFVMSNSF TNQVMAQIEL WTHPDKYPVG VHFLPKKLDE AVAEAHLGKL NVKLTKLTEK QAQYLGMSCD GPFKPDHYRY. S-adenosylhomocysteine hydrolase (A