The immunoglobulin heavy chain ( IgH ) class switch recombination of B lymphocytes preferentially targets unrearranged IgH genes that have already been rendered transcriptionally active .
the immunoglobulin heavy chain ( igh ) class switch recombination of b lymphocytes preferentially targets unrearranged igh genes that have already been rendered transcriptionally active .
O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group O O O O O B-cell_type I-cell_type O O O B-DNA_family_or_group I-DNA_family_or_group O O O O O B-other_name I-other_name O