tokens: The transcription factor E2F-1 plays a central role in the cell cycle through its ability to activate genes involved in cell division .
folded_tokens: the transcription factor e2f-1 plays a central role in the cell cycle through its ability to activate genes involved in cell division .
labels: O B-protein_family_or_group I-protein_family_or_group B-protein_molecule O O O O O O B-other_name I-other_name O O O O B-DNA_family_or_group I-DNA_family_or_group O O B-other_name I-other_name O