tokens: A 4-bp mutation of the core Sp1 consensus element ( GC box ) ( -20 ) reduced overall promoter activity of the 1-kb fragment .
folded_tokens: a 4-bp mutation of the core sp1 consensus element ( gc box ) ( -20 ) reduced overall promoter activity of the 1-kb fragment .
labels: O 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 B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O