Immunogen sequence: GPSSLMPVLG YDPPQLYLTQ LREAFGDLAL FFYDQHGGEV IGVLWKPTSF QPQPFKASST KGRMVMSRGG ELVMVPNVEA ILEDFAVLGE GLVQTVEARS ERWTV Highest antigen sequence identity to the following orthologs: Mouse - 91%, Rat - 93%. The nucleolus is a dense subnucl