Description_x000D_ General description_x000D_ Lipopolysaccharides (LPSs) consist of a lipid A moiety linked to an antigenic O-polysaccharide._x000D_ Application_x000D_ Lipopolysaccharide from Escherichia coli O55:B5 has been used:_x000D_ • to stimulate hepatocytes and non-parenchymal cells_x000D_ • to stimulate the spleen and study the expression of the Malitaf gene in the fish blunt snout bream_x000D_ • as part of the concanavalin A (ConA) and D-galactosamine/lipopolysaccharide (D-GalN/LPS) model of fulminant hepatitis to study the effect of the natural compound hesperetin_x000D_ Lipopolysaccharides (LPSs) are characteristic components of the cell wall of Gram-negative bacteria. LPS and its lipid A moiety stimulate cells of the innate immune system by the Toll-like receptor 4 (TLR4), a member of the Toll-like receptor protein family, which recognizes common pathogen-associated molecular-patterns (PAMPs)._x000D_ Packaging_x000D_ 10 mg in poly bottle_x000D_ 25, 100, 500 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Lipid A plays a role in the biological properties attributed to endotoxic LPS. LPS is a highly immunogenic antigen which has the ability to enhance immune responses.