Immunogen sequence: QPPPSTLPPF LAPEWDLLSP RVVLSRGAPA GPPLLFLLEA GAFRESAGAP ANRSRRGVSE TAPASRRGEL AVCDAVSGWV TDRRTAVDLR GREVEVLGEV PAAGGSPLRQ YFFETRCKAD NAEEGGPGAG GGGCRGVDRR HWVSECKAKQ SYVRALTADA QGRVGWRWIR IDTACVCTLL SRTGRA; Positive Samples: Rat thymus