IRF-1 is a transcription factor regulated by IFNs that is also essential for Th1 responses .
irf-1 is a transcription factor regulated by ifns that is also essential for th1 responses .
B-protein_molecule O O B-protein_family_or_group I-protein_family_or_group O O B-protein_family_or_group O O O O O B-cell_type O O