tokens: We previously showed that repression of the beta-globin gene appears to be mediated through two DNA sequences , silencers I and II , and identified a protein termed BP1 which binds to both silencer sequences .
folded_tokens: we previously showed that repression of the beta-globin gene appears to be mediated through two dna sequences , silencers i and ii , and identified a protein termed bp1 which binds to both silencer sequences .
labels: O O O O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O B-protein_molecule O O O O O O O