tokens: By using a DNA sequence selected for its ability to bind recombinant BCL-6 in vitro , we show here that BCL-6 is present in DNA-binding complexes in nuclear extracts from various B-cell lines .
folded_tokens: by using a dna sequence selected for its ability to bind recombinant bcl-6 in vitro , we show here that bcl-6 is present in dna-binding complexes in nuclear extracts from various b-cell lines .
labels: O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-protein_molecule B-protein_molecule O O O O O O O B-protein_molecule O O O B-protein_complex I-protein_complex O B-cell_component I-cell_component O O B-cell_line I-cell_line O