tokens: Mutation of the PU . 1 site did not significantly affect promoter activity .
folded_tokens: mutation of the pu . 1 site did not significantly affect promoter activity .
labels: 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 B-other_name I-other_name O