formation of lymph follicles in draining popliteal lymph nodes in athymic nude mice and their phenotypically normal littermates ( pn mice ) was investigated after footpad injection with either endotoxin lipopolysaccharide ( lps ) or phytohemagglutinin in soluble and precipitated forms ( pha ) .
C0014264
endotoxin
C0023810
lipopolysaccharide