tokens: Activation of the transcription factor NF-kappaB in lipopolysaccharide -stimulated U937 cells .
folded_tokens: activation of the transcription factor nf-kappab in lipopolysaccharide -stimulated u937 cells .
labels: O O O B-protein_family_or_group I-protein_family_or_group B-protein_complex O B-lipid O O O O