tokens: We analyzed the activity of the enhancer , the promoter and the silencer of the human CD4 gene during T cell development using transgenic mice .
folded_tokens: we analyzed the activity of the enhancer , the promoter and the silencer of the human cd4 gene during t cell development using transgenic mice .
labels: O O O O O O B-DNA_domain_or_region O O B-DNA_domain_or_region O O B-DNA_domain_or_region O O B-DNA_domain_or_region B-DNA_domain_or_region I-DNA_domain_or_region O B-other_name I-other_name I-other_name O B-other_artificial_source I-other_artificial_source O