Immunogen sequence: MAYAYLFKYI IIGDTGVGKS CLLLQFTDKR FQPVHDLTIG VEFGARMITI DGKQIKLQIW DTAGQESFRS ITRSYYRGAA GALLVYDITR RDTFNHLTTW LEDARQHSNS NMVIMLIGNK SDLESRREVK KEEGEAFARE HGLIFMETSA KTASNVEEAF INTAKEIYEK IQEGVFDINN EANGIKIGPQ HAATNATHAG NQGGQQAGGG CC;