L2262-25MG Display Image

Lipopolysaccharides from Salmonella enterica serotype typhimurium, purified by gel-filtration chromatography

Code: L2262-25MG D2-231

Application

Lipopolysaccharides (LPSs) are characteristic components of the cell wall of Gram-negative bacteria. LPS and its lipid A moiety stimulate cells of the innate immu...

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£533.00 25MG
List Price

Application

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).

Biochem/physiol Actions

Lipopolysaccharides (LPS) are localized in the outer layer of the membrane and are, in noncapsulated strains, exposed on the cell surface. They contribute to the integrity of the outer membrane, and protect the cell against the action of bile salts and lipophilic antibiotics.

General description

This product is extracted from Salmonella typhimurium and purified by gel filtration. The source strain is ATCC 7823.

Packaging

5, 25 mg in glass bottle

Preparation Note

The product is soluble in water (5 mg/ml) or cell culture medium (1 mg/ml) yielding a hazy, faint yellow solution. A more concentrated, though still hazy, solution (20 mg/ml) has been achieved in aqueous saline after vortexing and warming to 70-80 oC. Lipopolysaccharides are molecules that form micelles in every solvent. Hazy solutions are observed in water and phosphate buffered saline. Organic solvents do not give clearer solutions. Methanol yields a turbid suspension with floaters, while water yields a homogeneously hazy solution.

Quality Level200
biological sourceSalmonella enterica (Serotype typhimurium)
storage temp.2-8C
purified bygel-filtration chromatography
shipped inambient
formlyophilized powder
impurities1% Protein

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