tokens: The activation of nuclear factor kappa B ( NF-kappa B ) in intact cells is mechanistically not well understood .
folded_tokens: the activation of nuclear factor kappa b ( nf-kappa b ) in intact cells is mechanistically not well understood .
labels: O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule I-protein_molecule O O O O O O O O O O