Much attention has been focused on the interaction of Tat with a specific RNA target termed TAR ( transactivation responsive ) which is present in the leader sequence of all HIV-1 mRNAs .
much attention has been focused on the interaction of tat with a specific rna target termed tar ( transactivation responsive ) which is present in the leader sequence of all hiv-1 mrnas .
O O O O O O O O O B-protein_molecule O O O B-RNA_family_or_group I-RNA_family_or_group O B-RNA_domain_or_region O B-RNA_domain_or_region I-RNA_domain_or_region O O O O O O O O O O B-RNA_family_or_group I-RNA_family_or_group O