Abstract
The granule fraction of human neutrophils contains .gtoreq. 1 enzymes that partially deacylate S. typhimurium lipid A by removing the nonhydroxylated fatty acids, leaving almost all of the 3-hydroxytetradecanoic acid residues linked to glucosamine. Evidently, similar reactions occur in living neutrophils that ingest lipopolysaccharides by antibody-dependent phagocytosis.