Immunogen sequence: MDSTKEKCDS YKDDLLLRMG LNDNKAGMEG LDKEKINKII MEATKGSRFY GNELKKEKQV NQRIENMMQQ KAQITSQQLR KAQLQVDRFA MELEQSRNLS; Positive Samples: 22RV1, SKOV3, U-87MG, Mouse liver; Cellular Location: Nucleus. External and internal DNA-damaging agents