tokens: Direct sequencing of the viral genomes and reinfection kinetics showed no evidence of wild-type reversion even after prolonged infection with the Tat -virus .
folded_tokens: direct sequencing of the viral genomes and reinfection kinetics showed no evidence of wild-type reversion even after prolonged infection with the tat -virus .
labels: O O O O B-DNA_family_or_group I-DNA_family_or_group O O O O O O O B-other_name I-other_name O O O O O O B-protein_molecule O O