tokens: Among the protein-binding regions of the HIV-1 LTR is the transcription-enhancer region .
folded_tokens: among the protein-binding regions of the hiv-1 ltr is the transcription-enhancer region .
labels: O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region O