tokens: The region downstream of the enhancer ( DEN ) of the long terminal repeat of the mink cell focus-forming murine leukemia virus is important for viral pathogenicity .
folded_tokens: the region downstream of the enhancer ( den ) of the long terminal repeat of the mink cell focus-forming murine leukemia virus is important for viral pathogenicity .
labels: O O O O O B-DNA_domain_or_region O B-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-multi_cell O O O O O O O O B-other_name I-other_name O