Immunogen sequence: MGKKRTKGKT VPIDDSSETL EPVCRHIRKG LEQGNLKKAL VNVEWNICQD CKTDNKVKDK AEEETEEKPS VWLCLKCGHQ GCGRNSQEQH ALKHYLTPRS EPHCLVLSLD NWSVWCYVCD NEVQYCSSNQ LGQVVDYVRK QASITTPKPE KDNGNIELEN KKLEKESKNE QEREKKENMA KENPPMNSPC QITVKGLSNL GNTCFFNAVM QNL