Immunogen sequence: MERRRLWGSI QSRYISMSVW TSPRRLVELA GQSLLKDEAL AIAALELLPR ELFPPLFMAA FDGRHSQTLK AMVQAWPFTC LPLGVLMKGQ HLHLETFKAV LDGLDVLLAQ EVRPRRWKLQ VLDLRKNSHQ DFWTVWSGNR ASLYSFPEPE AAQPMTKKRK VDGLSTEAEQ PFIPVEVLVD LFLKEGACDE LFSYLIEKVK; Positive Samp