tokens: Retinoic acid can directly modulate gene expression via binding to its nuclear receptors , which can , in turn , activate transcription of target genes .
folded_tokens: retinoic acid can directly modulate gene expression via binding to its nuclear receptors , which can , in turn , activate transcription of target genes .
labels: O O O O O B-other_name I-other_name O O O O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O