tokens: One is the 21-base-pair ( bp ) core element that is responsible for trans-activation by the HTLV-I trans-activator p40tax and that has the ability to bind to cyclic-AMP responsive element binding factor ( CREB ) -like factor ( s ) .
folded_tokens: one is the 21-base-pair ( bp ) core element that is responsible for trans-activation by the htlv-i trans-activator p40tax and that has the ability to bind to cyclic-amp responsive element binding factor ( creb ) -like factor ( s ) .
labels: O O O B-DNA_domain_or_region I-DNA_domain_or_region I-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 O O B-virus B-protein_family_or_group B-protein_molecule O O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O O O O O