Immunogen sequence: REIASEPVAE HYFYTADFKT INQIGKKLQK KICVEEDPCA CESLVKFQAK VEGLLQALTR KLEAVSKRLA ILENTVV. This gene catalyzes a two-step reaction that involves the transfer of the adenosyl moiety of ATP to methionine to form S-adenosylmethionine and trip