This is the first description of an HIV-2 enhancer element which displays such monocyte specificity , and no comparable enhancer element has been clearly defined for HIV-1 .
this is the first description of an hiv-2 enhancer element which displays such monocyte specificity , and no comparable enhancer element has been clearly defined for hiv-1 .
O O O O O O O B-virus O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-virus O