Promiscuous transcriptional activity of the reticuloendotheliosis virus ( REV ) long terminal repeat ( LTR ) was detected in transient expression assays using LTR- chloramphenicol acetyltransferase -encoding gene chimeras , and cells of diverse species and tissue type ; levels of expression from two different REV LTRs correlate with reports of pathogenicity of the respective viruses in vivo .
promiscuous transcriptional activity of the reticuloendotheliosis virus ( rev ) long terminal repeat ( ltr ) was detected in transient expression assays using ltr- chloramphenicol acetyltransferase -encoding gene chimeras , and cells of diverse species and tissue type ; levels of expression from two different rev ltrs correlate with reports of pathogenicity of the respective viruses in vivo .
O O O O O B-virus I-virus O B-virus O O O O O B-DNA_domain_or_region O O O O B-other_name I-other_name I-other_name O B-DNA_family_or_group B-protein_molecule I-protein_molecule O O O O O O O O O O O O O O O O O O O B-virus O O O O O O O O O O O O O