The Tax protein , encoded by HTLV-I , is a potent transcription activator of viral and several cellular genes .
the tax protein , encoded by htlv-i , is a potent transcription activator of viral and several cellular genes .
O B-protein_molecule O O O O B-virus O O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O