tokens: Transfection experiments with c-myc promoter constructs in both DHL-9 and Raji cells revealed that the PuF site functioned as a positive regulatory element in B cells with a drop in activity with mutation of this site .
folded_tokens: transfection experiments with c-myc promoter constructs in both dhl-9 and raji cells revealed that the puf site functioned as a positive regulatory element in b cells with a drop in activity with mutation of this site .
labels: O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-cell_line O B-cell_line I-cell_line O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O B-cell_type I-cell_type O O O O O O O O O O O