tokens: This sequence is well conserved in various HIV-1 isolates and partial homology was found with the promoter region of the human retinoblastoma gene .
folded_tokens: this sequence is well conserved in various hiv-1 isolates and partial homology was found with the promoter region of the human retinoblastoma gene .
labels: O O O O O O O B-virus O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O