The enhancer for the immunoglobulin mu heavy chain gene ( IgH ) activates a heterologous gene at the pre-B cell stage of B lymphocyte differentiation .
the enhancer for the immunoglobulin mu heavy chain gene ( igh ) activates a heterologous gene at the pre-b cell stage of b lymphocyte differentiation .
O B-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-protein_subunit O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-other_name I-other_name I-other_name O B-cell_type I-cell_type O O