Most hybrids express both KBF1 and NF-kappa B in their nuclei , but one hybrid expresses only KBF1 .
most hybrids express both kbf1 and nf-kappa b in their nuclei , but one hybrid expresses only kbf1 .
O O O O B-protein_molecule O B-protein_family_or_group I-protein_family_or_group O O B-cell_component O O O O O O B-protein_molecule O