tokens: Activated Jurkat cells died by apoptosis , and only cells with mutated nef genes expressing truncated Nefs survived , which rendered Nef nonfunctional .
folded_tokens: activated jurkat cells died by apoptosis , and only cells with mutated nef genes expressing truncated nefs survived , which rendered nef nonfunctional .
labels: O B-cell_line I-cell_line O O B-other_name O O O O O O B-DNA_family_or_group I-DNA_family_or_group O O B-protein_molecule O O O O B-protein_molecule O O