However , the NF-kappaB activation pathway involving the acidic sphingomyelinase of the endolysosomial membrane did not seem to participate in the LPS -induced NF-kappaB activation in U937 cells .
however , the nf-kappab activation pathway involving the acidic sphingomyelinase of the endolysosomial membrane did not seem to participate in the lps -induced nf-kappab activation in u937 cells .
O O O B-protein_complex O O O O B-protein_molecule I-protein_molecule O O B-cell_component I-cell_component O O O O O O O B-lipid O B-protein_complex O O B-cell_line I-cell_line O