Immunogen sequence: MSKNTVSSAR FRKVDVDEYD ENKFVDEEDG GDGQAGPDEG EVDSCLRHSI TGNMTAALQA ALKNPPINTK SQAVKDRAGS IVLKVLISFK ANDIEKAVQS LDKNGVDLLM KYIYKGFESP SDNSSAMLLQ WHEKALAAGG VGSIVRVLTA RKTV; Positive Samples: Mouse spleen, Mouse small intestine, Rat brai