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Key Documents

L4524

Sigma-Aldrich

Lipopolysaccharides from Escherichia coli O55:B5

purified by ion-exchange chromatography, TLR ligand tested

Sinónimos:

LPS

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About This Item

EC Number:
297-473-0
MDL number:
MFCD00164401
UNSPSC Code:
12352201
NACRES:
NA.25

biological source

Escherichia coli (O55:B5)

Quality Level

200

form

lyophilized powder

purified by

ion-exchange chromatography

impurities

<1% Protein
<1% RNA

color

white to yellow cast

solubility

water: soluble

shipped in

ambient

storage temp.

2-8°C

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General description

This product is extracted from E. coli serotype O55:B5 and purified by ion exchange. The source strain is CDC 1644-70. The LPS O55:B5 has been used to stimulate human peritoneal macrophages at 1 ng/mL and to stimulate equine peritoneal macrophages at 1-100 ng/mL.

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.

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Referencia del producto
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L4524

Lipopolysaccharides from Escherichia coli O55:B5, purified by ion-exchange chromatography, TLR ligand tested

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Lipopolysaccharides from Escherichia coli O55:B5, purified by trichloroacetic acid extraction

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Lipopolysaccharides from Escherichia coli O55:B5, γ-irradiated, BioXtra, suitable for cell culture

L2637

Lipopolysaccharides from Escherichia coli O55:B5, purified by gel-filtration chromatography

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Lipopolysaccharides from Escherichia coli O55:B5, purified by phenol extraction

F8666

Lipopolysaccharides from Escherichia coli O55:B5, FITC conjugate

L5418

Lipopolysaccharides from Escherichia coli O55:B5, Ready Made solution, 1 mg/mL

pictograms

Skull and crossbones
GHS06

signalword

Danger

hcodes

H300

Hazard Classifications

Acute Tox. 2 Oral

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificados de análisis (COA)

Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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Contenido relacionado

Lipopolysaccharides

Lipopolysaccharide (LPS) is the major component of the outer membrane of Gram-negative bacteria. Lipopolysaccharide is localized in the outer layer of the membrane and is, in noncapsulated strains, exposed on the cell surface.

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