Members of a protein family , characterized by three zinc fingers highly homologous to those found in transcription factor Sp1 , interact with these motifs .
members of a protein family , characterized by three zinc fingers highly homologous to those found in transcription factor sp1 , interact with these motifs .
O O O O O O O O O B-protein_substructure I-protein_substructure O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O