Immunogen sequence: HIIKETKEEV TPEQLKLMRT QDVKYIEMKR VAEAKKIERL KSELHLLDFQ GKQQNKHVFF FDTKKEVEQF DVATHLQTAP EL Highest antigen sequence identity to the following orthologs: Mouse - 93%, Rat - 93%. Involved in nucleolar processing of pre-18S ribosomal RNA