The SLPI protein is an acid-stable protease inhibitor that modulates immune responses to bacterial infections.It downregulates responses to bacterial lipopolysaccharide (LPS) and modulates NF-kappa-B activation and inflammatory responses.SLPI Protein, Mouse (HEK293, Fc) is the recombinant mouse-derived SLPI protein, expressed by HEK293 , with C-hFc labeled tag.