Immunogen sequence: MASPSSFTYY CPPSSSPVWS EPLYSLRPEH ARERLQDDSV ETVTSIEQAK VEEKIQEVFS SYKFNHLVPR LVLQREKHFH YLKRGLRQLT DAYECLDASR PWLCYWILHS LELLDEPIPQ; Positive Samples: 293T, HeLa, HepG2, K-562, Mouse brain, Rat brain. Eukaryotic cells contain 3 differ