Thus , Elf-1 is a novel transcription factor that appears to be required for the T-cell-receptor-mediated trans activation of HIV-2 gene expression .
thus , elf-1 is a novel transcription factor that appears to be required for the t-cell-receptor-mediated trans activation of hiv-2 gene expression .
O O B-protein_molecule O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O B-other_name I-other_name I-other_name O B-virus O O O