BASH , a novel signaling molecule preferentially expressed in B cells of the bursa of Fabricius .
bash , a novel signaling molecule preferentially expressed in b cells of the bursa of fabricius .
B-protein_molecule O O B-protein_molecule I-protein_molecule I-protein_molecule O O O B-cell_type I-cell_type O O B-body_part I-body_part I-body_part O