tokens: We have used a somatic cell hybridization approach to genetically analyse regulation of the activity of the IgH 3' enhancer .
folded_tokens: we have used a somatic cell hybridization approach to genetically analyse regulation of the activity of the igh 3' enhancer .
labels: O O O O B-other_name I-other_name I-other_name I-other_name O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O