The proto-oncogene products c-Fos and c-Jun heterodimerize through their leucine zippers to form the AP-1 transcription factor .
the proto-oncogene products c-fos and c-jun heterodimerize through their leucine zippers to form the ap-1 transcription factor .
O B-protein_family_or_group I-protein_family_or_group B-protein_molecule O B-protein_molecule O O O B-protein_substructure I-protein_substructure O O O B-protein_molecule I-protein_molecule I-protein_molecule O