The molecular basis for this species specificity is that IFN-alpha /beta activate Stat4 in differentiating human , but not mouse , Th cells .
the molecular basis for this species specificity is that ifn-alpha /beta activate stat4 in differentiating human , but not mouse , th cells .
O O O O O O O O O B-protein_molecule O O B-protein_molecule O O O O O O O O B-cell_type I-cell_type O