Many of these events are dependent upon the ability of CD40 to activate the transcription factor NF-kappa B ( NF-kappa B ) .
many of these events are dependent upon the ability of cd40 to activate the transcription factor nf-kappa b ( nf-kappa b ) .
O O O O O O O O O O B-protein_molecule O O O O O B-protein_complex I-protein_complex O B-protein_complex I-protein_complex O O