We examined these clones for differences in nuclear factor ( NF ) -kappa B activity which might account for the observed phenomenon .
we examined these clones for differences in nuclear factor ( nf ) -kappa b activity which might account for the observed phenomenon .
O O O O O O O B-protein_complex I-protein_complex I-protein_complex I-protein_complex I-protein_complex I-protein_complex I-protein_complex O O O O O O O O O