The intracellular events that lead to the inactivation of I kappa B , i . e . the activation of NF-kappa B , are complex .
the intracellular events that lead to the inactivation of i kappa b , i . e . the activation of nf-kappa b , are complex .
O O O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O O B-protein_complex I-protein_complex O O O O