The hypothesis that soluble peptidoglycan (sPGN, a macrophage-activator from Gram-positive bacteria) binds to CD14 (a lipopolysaccharide (LPS) receptor) was tested. sPGN specifically bound to CD14 in the following three assays: binding of soluble 32P-CD14 (sCD14) to agarose-immobilized sPGN, enzyme-...
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