tokens: High level gene expression of these TAR mutant constructs in phorbol ester -treated Jurkat cells was eliminated by second site mutations in the enhancer region or by disruption of the tat gene .
folded_tokens: high level gene expression of these tar mutant constructs in phorbol ester -treated jurkat cells was eliminated by second site mutations in the enhancer region or by disruption of the tat gene .
labels: O O B-other_name I-other_name O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O B-other_organic_compound I-other_organic_compound O B-cell_line I-cell_line O O O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O