Viral gene expression may be reactivated by stimulation of the cells with LPS or cytokines such as TNF-alpha in vitro .
viral gene expression may be reactivated by stimulation of the cells with lps or cytokines such as tnf-alpha in vitro .
B-other_name I-other_name I-other_name O O O O O O O O O B-lipid O B-protein_family_or_group O O B-protein_molecule O O O