IFN regulatory factor 1 ( IRF-1 ) is a transcription factor activated by either CD40 or cytokines .
ifn regulatory factor 1 ( irf-1 ) is a transcription factor activated by either cd40 or cytokines .
B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O B-protein_family_or_group I-protein_family_or_group O O O B-protein_molecule O B-protein_family_or_group O