In this study , we show that USF/ c-Myc up-regulates , while YY1 down-regulates the promoter activity of CXCR4 , a coreceptor for T cell-tropic HIV-1 entry .
in this study , we show that usf/ c-myc up-regulates , while yy1 down-regulates the promoter activity of cxcr4 , a coreceptor for t cell-tropic hiv-1 entry .
O O O O O O O B-protein_molecule B-protein_molecule O O O B-protein_molecule O O B-other_name I-other_name O B-protein_molecule O O O O B-other_name I-other_name B-virus O O