tokens: We also examined the function of the IL-3 CK-1/CK-2 elements that are present in many cytokine genes and found that they acted as a repressor of basal level expression when cloned upstream of a heterologous promoter but were also inducible by PMA /PHA .
folded_tokens: we also examined the function of the il-3 ck-1/ck-2 elements that are present in many cytokine genes and found that they acted as a repressor of basal level expression when cloned upstream of a heterologous promoter but were also inducible by pma /pha .
labels: O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-DNA_family_or_group I-DNA_family_or_group O O O O O O O O O B-other_name I-other_name I-other_name O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-other_organic_compound B-protein_molecule O