The viral protein Tax was likely responsible for this higher level of class II gene transcription , as purified Tax was found to stimulate both genes when added to the uninfected cell extract or in reconstituted systems .
the viral protein tax was likely responsible for this higher level of class ii gene transcription , as purified tax was found to stimulate both genes when added to the uninfected cell extract or in reconstituted systems .
O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O B-protein_molecule I-protein_molecule O O O O O O O O O O B-other_name I-other_name I-other_name O O B-other_name I-other_name O