tokens: Human immunodeficiency viruses containing heterologous enhancer/promoters are replication competent and exhibit different lymphocyte tropisms .
folded_tokens: human immunodeficiency viruses containing heterologous enhancer/promoters are replication competent and exhibit different lymphocyte tropisms .
labels: B-virus I-virus I-virus O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-other_name I-other_name O