Immunogen sequence: PDGTYEPGFV GIRFCQECNN MLYPKEDKEN RILLYACRNC DYQQEADNSC IYVNKITHEV DELTQIIADV SQDPTLPRTE DHPCQKCGHK EAVFFQSHSA Highest antigen sequence identity to the following orthologs: Mouse - 100%, Rat - 100%. POLR2I is a subunit of RNA polymeras