Furthermore , expression of physiological levels of Bcl-x protected B cells from Fas-mediated apoptosis in the absence of NF-kappaB signaling .
furthermore , expression of physiological levels of bcl-x protected b cells from fas-mediated apoptosis in the absence of nf-kappab signaling .
O O O O O O O B-protein_molecule O B-cell_type I-cell_type O O B-other_name O O O O B-protein_complex O O