While in most cell types , activation requires interaction of Tat with the unusual transcription element TAR , astrocytic glial cells support TAR -independent transactivation of HIV-1 transcription by Tat .
while in most cell types , activation requires interaction of tat with the unusual transcription element tar , astrocytic glial cells support tar -independent transactivation of hiv-1 transcription by tat .
O O O O O O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group B-DNA_domain_or_region O B-cell_type I-cell_type I-cell_type O B-DNA_domain_or_region O O O B-virus O O O O