tokens: The activity of the immunoglobulin heavy-chain ( IgH ) enhancer is restricted to B cells , although it binds both B-cell-restricted and ubiquitous transcription factors .
folded_tokens: the activity of the immunoglobulin heavy-chain ( igh ) enhancer is restricted to b cells , although it binds both b-cell-restricted and ubiquitous transcription factors .
labels: O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O B-cell_type I-cell_type O O O O O O O O O O O