tokens: The transcription of the human immunodeficiency virus type 1 ( HIV-1 ) is under the control of cellular proteins that bind to the viral long terminal repeat ( LTR ) .
folded_tokens: the transcription of the human immunodeficiency virus type 1 ( hiv-1 ) is under the control of cellular proteins that bind to the viral long terminal repeat ( ltr ) .
labels: O O O O B-virus I-virus I-virus O O O B-virus O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region O O