tokens: First , deletion analysis revealed that a region of TCF-1 containing the HMG box was sufficient for sequence-specific binding .
folded_tokens: first , deletion analysis revealed that a region of tcf-1 containing the hmg box was sufficient for sequence-specific binding .
labels: O O B-other_name I-other_name O O O O O B-protein_molecule O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-other_name I-other_name O