The regulatory Tat protein of the human immunodeficiency virus type-1 ( HIV-1 ) is essential for viral replication and also shows pleiotropic activities on various cell functions .
the regulatory tat protein of the human immunodeficiency virus type-1 ( hiv-1 ) is essential for viral replication and also shows pleiotropic activities on various cell functions .
O B-protein_molecule I-protein_molecule I-protein_molecule O O B-virus I-virus I-virus I-virus O B-virus O O O O B-other_name I-other_name O O O O O O O B-other_name I-other_name O