tokens: Transfection of EL-4 cells with the IL-4 promoter-reporter constructs carrying mutated P -like elements showed that four P-like elements , CLE0 , P , P2 and P4 , but not P3 , were required for optimal activation of the IL-4 promoter .
folded_tokens: transfection of el-4 cells with the il-4 promoter-reporter constructs carrying mutated p -like elements showed that four p-like elements , cle0 , p , p2 and p4 , but not p3 , were required for optimal activation of the il-4 promoter .
labels: O O B-cell_line I-cell_line O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O B-DNA_domain_or_region B-DNA_domain_or_region O O O O O B-DNA_family_or_group I-DNA_family_or_group O B-DNA_domain_or_region O B-DNA_domain_or_region O B-DNA_domain_or_region O B-DNA_domain_or_region O O O B-DNA_domain_or_region O O O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O