Immunogen sequence: TCIVQHFEDS NDCPRCGNQV HETNPLEMLR LDNTLEEIIF KLVPGLREQE LERESEFWKK NKPQENGQDD TSKAD Highest antigen sequence identity to the following orthologs: Mouse - 95%, Rat - 93%. Component of a Polycomb group (PcG) multiprotein PRC1-like comple