tokens: In vitro transcription studies showed reduced levels of Tax -activated transcription in cell extracts depleted of TFIIA .
folded_tokens: in vitro transcription studies showed reduced levels of tax -activated transcription in cell extracts depleted of tfiia .
labels: B-other_name I-other_name I-other_name I-other_name O O O O B-protein_molecule O O O O O O O B-protein_molecule O