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Key Documents

L7261

Sigma-Aldrich

Lipopolysaccharides from Salmonella enterica serotype typhimurium

purified by trichloroacetic acid extraction

Sinónimos:

LPS

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About This Item

MDL number:
UNSPSC Code:
12352201
NACRES:
NA.25

biological source

Salmonella enterica (Serotype typhimurium)

Quality Level

form

lyophilized powder

purified by

trichloroacetic acid extraction

impurities

1-10% Protein (Lowry)

color

white to faint yellow

solubility

water: 0.90-1.10 mg/mL, faintly hazy to hazy, colorless to faintly yellow

shipped in

ambient

storage temp.

2-8°C

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General description

This product is TCA extracted from Salmonella typhimurium. The source strain is ATCC 7823. This LPS serotype has been used to induce NOS in rats and guinea pigs.

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.

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.

Other Notes

To gain a comprehensive understanding of our extensive range of Lipopolysaccharides for your research, we encourage you to visit our Carbohydrates Category page.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


Certificados de análisis (COA)

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