Abstract Lipopolysaccharides (LPS) are outer membrane components of Gram-negative bacteria made of three regions: the O-antigen; the core oligosaccharide; and a glucosamine disaccharide linked to hydroxy fatty acids. which is named lipid A. The number phosphate groups. and hydroxy fatty acid chains is associated with the immunopotency and the immunomodulatory activity of LPS. https://toyscyclers.shop/product-category/puzzles/