LAMP3 and infection: Flow cytometry of stimulated monocytes revealed that only marginal amounts of LAMP3 reached the cell surface in naïve or tolerized monocytes, similar to results obtained for cell surface protein amounts detected for Excitatory amino acid transporter 1/SLC1A3.PTGS2 is a peripheral membrane protein of the Endoplasmic reticulum with dual enzymatic activity involved in the biosynthesis pathway of prostaglandins with a particular role in the inflammatory response to infections.