In order to characterize the function of cis-acting elements , we have developed an in vitro system in which a DRA promoter construct is transcribed more efficiently in extracts from B cells than in extracts from class II-negative HeLa cells .
in order to characterize the function of cis-acting elements , we have developed an in vitro system in which a dra promoter construct is transcribed more efficiently in extracts from b cells than in extracts from class ii-negative hela cells .
O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O O O O O O O O O O O B-DNA_molecule I-DNA_molecule I-DNA_molecule O O O O O B-other_name O B-cell_type I-cell_type O O B-other_name O B-cell_line I-cell_line I-cell_line I-cell_line O