Skeletal myogenesis is regulated by a group of transcription factors ( MyoD , myogenin , myf5 , and myf6 ) that are "basic helix-loop-helix" proteins that bind to the promoters of muscle-specific genes and promote their expression .
skeletal myogenesis is regulated by a group of transcription factors ( myod , myogenin , myf5 , and myf6 ) that are "basic helix-loop-helix" proteins that bind to the promoters of muscle-specific genes and promote their expression .
O O O O O O O O B-protein_family_or_group I-protein_family_or_group O B-protein_molecule O B-protein_molecule O B-protein_molecule O O B-protein_molecule O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O B-DNA_domain_or_region O B-DNA_family_or_group I-DNA_family_or_group O O O O O