Later , the expression of the BSAP gene shifts to the fetal liver where it correlates with the onset of B lymphopoiesis .
later , the expression of the bsap gene shifts to the fetal liver where it correlates with the onset of b lymphopoiesis .
O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-body_part I-body_part O O O O O O O B-other_name I-other_name O