The E2F family of transcription factors are thought to play an important role in the control of cell cycle progression .
the e2f family of transcription factors are thought to play an important role in the control of cell cycle progression .
O B-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O B-other_name I-other_name I-other_name O