Immunogen sequence: MAEEFVTLKDV GMDFTLGDWE QLGLEQGDTF WDTALDNCQD LFLLDPPRPN LTSHPDGSED LEPLAGG Highest antigen sequence identity to the following orthologs - mouse 51%, rat 59%. Involved in histone 3'-end pre-mRNA processing by associating with U7 snRNP