Activity of the immunoglobulin heavy and kappa light chain gene enhancers depends on a complex interplay of ubiquitous and developmentally regulated proteins .
activity of the immunoglobulin heavy and kappa light chain gene enhancers depends on a complex interplay of ubiquitous and developmentally regulated proteins .
O O O O O O O O O O O O O O O O O B-protein_family_or_group O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O