BCL-6 mutations in normal germinal center B cells : evidence of somatic hypermutation acting outside Ig loci .
bcl-6 mutations in normal germinal center b cells : evidence of somatic hypermutation acting outside ig loci .
B-protein_molecule O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O