tokens: These studies indicate that heterologous enhancer elements are capable of restoring Tat responsiveness to the HIV LTR in the context of directing reporter gene expression as well as in the production of infectious progeny virions .
folded_tokens: these studies indicate that heterologous enhancer elements are capable of restoring tat responsiveness to the hiv ltr in the context of directing reporter gene expression as well as in the production of infectious progeny virions .
labels: O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-protein_family_or_group O O O B-virus O O O O O O B-DNA_molecule I-DNA_molecule O O O O O O O O B-other_name I-other_name I-other_name O