Immunogen sequence: CDPEEEAPPP VPVKLLDENE NLQEKEGGEA EESATDTTSE TNKRFSSLSY KSREEDPTLT EEEISAMYSS VNKPGQLVNK SGQSLTVPES TYTSIQGDPQ R; Positive Samples: Mouse brain, Rat brain. PAG (phosphoprotein associated with GEMs), also known as Cbp (Csk-binding prote