Immunogen sequence: MAMAPSPSLV QVYTSPAAVA VWEWQDGLGT WHPYSATVCS FIEQQFVQQK GQRFGLGSLA HSIPLGQADP SLAPYIIDLP SWTQFRQDTG TMRAVRRHLF PQHSAPGRGV VWEWLSDDGS WTAYEASVCD YLEQQVARGN QLVDLAPLGY NYTVNYTTHT QTNKTSSFCR SVRRQAGPPY PVTTIIAPPG HTGVACSCHQ CLSGSRTGPV SGR