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L8274

Sigma-Aldrich

Lipopolysaccharides from Escherichia coli O26:B6

≥10,000 EU/mg, purified by phenol extraction

Synonym(s):

LPS

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About This Item

CAS Number:
93572-42-0
EC Number:
297-473-0
MDL number:
MFCD00164401
UNSPSC Code:
12352201
NACRES:
NA.25
Pricing and availability is not currently available.

biological source

Escherichia coli (O26:B6)

Quality Level

200

form

lyophilized powder

specific activity

≥10,000 EU/mg

purified by

phenol extraction

impurities

<3% Protein (Lowry)

color

white to faint yellow

solubility

water: soluble

shipped in

ambient

storage temp.

2-8°C

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General description

This product is phenol extract from E. coli serotype O26:B6. The source strain is ATCC 12795. LPS from serotype 026:B6 is the only LPS from E. coli which exhibits short chain-length behavior on SDS-PAGE. The short chain-length of this LPS is closer to that of the mutant rough strain LPS. This LPS serotype has been used at 1 ug/ml to stimulate neutrophils.

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.

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H300

Hazard Classifications

Acute Tox. 2 Oral

Storage Class Code

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

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000398621
0000369280
0000398621
0000325075
0000369280

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Una Avdic et al.
Frontiers in neurology, 10, 701-701 (2019-07-25)
Non-convulsive status epilepticus (NCSE) is a prolonged epileptic seizure with subtle symptoms that may delay clinical diagnosis. Emerging experimental evidence shows brain pathology and epilepsy development following NCSE. New diagnostic/prognostic tools are therefore needed for earlier and better stratification of
Marie-Anne Mawhin et al.
Cardiovascular research, 114(12), 1656-1666 (2018-05-26)
Both leukotrienes and neutrophils have been linked to plaque destabilization. Despite being evoked, the role of leukotriene B4 (LTB4) in neutrophil recruitment to plaques and the concomitant effects of these two actors on plaque stability remain to be proven. Since
Yvonne Huber et al.
Cell death & disease, 8(6), e2893-e2893 (2017-06-24)
Physical activity confers a broad spectrum of health benefits. Beyond the obvious role in metabolically driven diseases, the role of physical activity in acute liver injury is poorly explored. To study the role of physical activity in acute liver injury
Cheng-Jui Lee et al.
British journal of pharmacology, 146(3), 378-388 (2005-07-19)
Oregonin isolated from Alnus formosana is a diarylheptanoid derivative, which appears to have antioxidative and anti-inflammatory activities. In this study, our data demonstrated inhibitory actions of oregonin on the LPS-induced iNOS protein in RAW264.7 macrophages and BV-2 microglial cells. We
Hayley T Nicholls et al.
Diabetes, 60(4), 1100-1110 (2011-03-08)
The fatty acid translocase and scavenger receptor CD36 is important in the recognition and uptake of lipids. Accordingly, we hypothesized that it plays a role in saturated fatty acid-induced macrophage lipid accumulation and proinflammatory activation. In vitro, the effect of
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Articles

Lipopolysaccharides for Research – Structure, Function & Applications

Explore the structure, function, and diverse applications of Lipopolysaccharides. Discover their role in bacteria, serological specificity, and research potential.

Lipopolysaccharides for Research – Structure, Function & Applications

Explore the structure, function, and diverse applications of Lipopolysaccharides. Discover their role in bacteria, serological specificity, and research potential.

Lipopolysaccharides for Research – Structure, Function & Applications

Explore the structure, function, and diverse applications of Lipopolysaccharides. Discover their role in bacteria, serological specificity, and research potential.

Lipopolysaccharides for Research – Structure, Function & Applications

Explore the structure, function, and diverse applications of Lipopolysaccharides. Discover their role in bacteria, serological specificity, and research potential.

Questions

  1. Dose of this preparation And 10mg vial can be used for how many animals

    1 answer

    1. This product has not been tested for use in animal models. The dosage would have to be determined by the researcher. The L8274 is prepared by phenol extraction. This method of preparation may allow for trace amounts of solvent. For in vitro use, it would be recommended for the product to be further purified by gel-filtration. Please see product L2762: https://www.sigmaaldrich.com/product/sigma/l2762.

      A pre-sterilized version of this product is offered that is tested for use in cell culture. Please see product L2654: https://www.sigmaaldrich.com/product/sigma/l2654

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