tokens: Many transcription factors contain similar structural protein sequences , and we have used an RT-PCR -based approach to isolate sequences , from transcription factor gene families which share similar domains .
folded_tokens: many transcription factors contain similar structural protein sequences , and we have used an rt-pcr -based approach to isolate sequences , from transcription factor gene families which share similar domains .
labels: O B-protein_family_or_group I-protein_family_or_group O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O O O O B-other_name O O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O O O O