tokens: Splitting the HS2 enhancer between two tandem Ap1 sites abolishes the synthesis of a group of long enhancer transcripts and results in loss of enhancer function and transcriptional silencing of the cis-linked CAT gene .
folded_tokens: splitting the hs2 enhancer between two tandem ap1 sites abolishes the synthesis of a group of long enhancer transcripts and results in loss of enhancer function and transcriptional silencing of the cis-linked cat gene .
labels: O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group O O O O O B-other_name I-other_name O B-other_name I-other_name O O B-DNA_substructure I-DNA_substructure I-DNA_substructure O