tokens: The SV40 core sequence competed for META ( D+ ) binding factors , but META ( D+ ) failed to compete for the complexes obtained with the SV40 probe .
folded_tokens: the sv40 core sequence competed for meta ( d+ ) binding factors , but meta ( d+ ) failed to compete for the complexes obtained with the sv40 probe .
labels: O B-DNA_domain_or_region I-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 I-DNA_domain_or_region O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O B-polynucleotide I-polynucleotide O