Immunogen sequence: DNHIVSHMKS YSYRYLINSY DFVNDTLSLK HTSAGPRYQY LINHKEKCQA QDVLLLLFVK TAPENYDRRS GIRRTWGNEN YVRSQLNANI KTLFALGTPN PLEGEELQRK LAWEDQRYND IIQQDFVDSF YNLTLKLLMQ FSWANTYCPH AKFLMTADDD IFIHMPNLIE YLQSLEQIGV QDFWIGRVHR GAPPIRDKSS KYYVSYEMYQ WPA