BMI1, BMI1 Proto-Oncogene, Polycomb Ring Finger, RNF51, PCGF4, Polycomb Group RING Finger Protein 4, Polycomb Complex Protein BMI-1, B Lymphoma Mo-MLV Insertion Region 1 Homolog (Mouse), Murine Leukemia Viral (Bmi-1) Oncogene Homolog, B Lymphoma Mo-MLV Insertion Region 1 Homolog, BMI1 Polycomb Ring Finger Proto-Oncogene, BMI1 Polycomb Ring Finger Oncogene, Polycomb Group Ring Finger 4, Polycomb Group Protein Bmi1, Ring Finger Protein 51, RING Finger Protein 51, Flvi-2/Bmi-1, FLVI2/BMI1