tokens: The addition of the third intron of TNF-alpha to this construct resulted in an enhancement of CAT protein .
folded_tokens: the addition of the third intron of tnf-alpha to this construct resulted in an enhancement of cat protein .
labels: O O O O B-DNA_domain_or_region I-DNA_domain_or_region O B-protein_molecule O O O O O O O O B-protein_family_or_group I-protein_family_or_group O