Specific docking sites within individual cytokine receptors have been identified for almost all Stat proteins .
specific docking sites within individual cytokine receptors have been identified for almost all stat proteins .
O B-protein_domain_or_region I-protein_domain_or_region O O B-protein_family_or_group I-protein_family_or_group O O O O O O B-protein_family_or_group I-protein_family_or_group O