tokens: We have isolated a human cDNA clone encoding a zinc finger protein ( NF-E1 ) that binds to the negative-acting segment of the kappa E3' enhancer .
folded_tokens: we have isolated a human cdna clone encoding a zinc finger protein ( nf-e1 ) that binds to the negative-acting segment of the kappa e3' enhancer .
labels: O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O