Immunogen sequence: SLSGYNYEVY HSLEEIQNWM HHLNKTHSGL IHMFSIGRSY EGRSLFILKL GRRSRLKRAV WIDCGIHARE WIGPAFCQWF VKEALLTYKS DPAMRKMLNH LYFYIMPVFN VDGYHFSWTN DRFWRKTRSR NSRFRCRGVD ANRNWKVKWC DEGASMHPCD DTYCGPFPES EPEVKAVANF LRKHRKHIRA YLSFHAYAQM LLYPYSYKYA TIP