The B29 ( immunoglobulin beta-chain ) gene is a genetic target for early B-cell factor .
the b29 ( immunoglobulin beta-chain ) gene is a genetic target for early b-cell factor .
O B-DNA_domain_or_region I-DNA_domain_or_region B-protein_subunit I-protein_subunit O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O