Immunogen sequence: SELEADLAEQ QHLRQQAADD CEFLRAELDE LRRQREDTEK AQRSLSEIER KAQANEQRYS KLKEKYSELV QNHADLLRKN AEVTKQVSMA RQAQVDLERE KKELEDSLER ISDQGQRKTQ EQLEVLESLK QELATSQREL QVLQGSLETS AQSEANWAAE FAELEKERDS LVSGAAHREE ELSALRKELQ DTQLKLASTE ESMCQLAKDQ RKM