tokens: Because point mutagenesis cannot distinguish between family members , it is not known which protein activates 5'HS3 .
folded_tokens: because point mutagenesis cannot distinguish between family members , it is not known which protein activates 5'hs3 .
labels: O B-other_name I-other_name O O O O O O O O O O O O O B-DNA_domain_or_region O