Mutual regulation of the transcriptional activator NF-kappa B and its inhibitor , I kappa B-alpha .
mutual regulation of the transcriptional activator nf-kappa b and its inhibitor , i kappa b-alpha .
O O O O B-protein_family_or_group I-protein_family_or_group B-protein_molecule I-protein_molecule O O O O B-protein_molecule I-protein_molecule I-protein_molecule O