In addition to these novel E2F complexes , three distinct forms of unbound ( free ) E2F were resolved in gel shift experiments .
in addition to these novel e2f complexes , three distinct forms of unbound ( free ) e2f were resolved in gel shift experiments .
O O O O B-protein_complex B-protein_molecule O O O O O O O O O O B-protein_molecule O O O B-other_name I-other_name I-other_name O