[polycomb complex protein BMI-1, Polycomb complex protein BMI-1, polycomb complex protein BMI-1, flvi-2/bmi-1, ring finger protein 51, polycomb group protein Bmi1, BMI1 polycomb ring finger oncogene, polycomb group RING finger protein 4, BMI1 polycomb ring finger proto-oncogene, B lymphoma Mo-MLV insertion region 1 hom, BMI1 proto-oncogene, polycomb ring finger, Polycomb group RING finger protein 4, RING finger protein 51]