tokens: IL-2 superinduction by Tat occurred at the transcriptional level , was mediated by the CD28 -responsive element in the IL-2 promoter , and was exclusively dependent on the 29 amino acids encoded by the second exon of Tat .
folded_tokens: il-2 superinduction by tat occurred at the transcriptional level , was mediated by the cd28 -responsive element in the il-2 promoter , and was exclusively dependent on the 29 amino acids encoded by the second exon of tat .
labels: B-protein_molecule O O B-protein_molecule O O O B-other_name I-other_name O O O O O B-protein_molecule O O O O B-protein_molecule O O O O O O O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region B-protein_molecule O