tokens: B-cell immortalization by Epstein-Barr virus ( EBV ) is dependent on permanent control of the cellular processes which normally regulate cell division and apoptosis , functions possessed by p53 in a number of normal cell types .
folded_tokens: b-cell immortalization by epstein-barr virus ( ebv ) is dependent on permanent control of the cellular processes which normally regulate cell division and apoptosis , functions possessed by p53 in a number of normal cell types .
labels: B-cell_type O O B-virus I-virus O B-virus O O O O O O O O O O O O O B-other_name I-other_name O B-other_name O O O O B-protein_molecule O O O O O O O O