The human T-cell leukemia virus type 1 posttranscriptional trans-activator Rex contains a nuclear export signal .
the human t-cell leukemia virus type 1 posttranscriptional trans-activator rex contains a nuclear export signal .
O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group B-protein_molecule O O B-protein_substructure I-protein_substructure I-protein_substructure O