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L2018

Sigma-Aldrich

Lipopolysaccharides from Escherichia coli K-235

purified by gel-filtration chromatography

Synonyme(s) :

LPS

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About This Item

Numéro CE :
297-473-0
Numéro MDL:
MFCD00164401
Code UNSPSC :
12352201
Nomenclature NACRES :
NA.25

Source biologique

Escherichia coli (K-235)

Niveau de qualité

200

Forme

lyophilized powder

Produit purifié par

gel-filtration chromatography

Impuretés

<1% Protein

Couleur

white to yellow cast

Solubilité

water: 4.90-5.10 mg/mL, cloudy to hazy, colorless to faintly yellow

Conditions d'expédition

ambient

Température de stockage

2-8°C

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Description générale

This product is extracted from E. coli serotype K235 and purified by gel filtration. The source strain is ATCC 13027.

Actions biochimiques/physiologiques

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.

Notes préparatoires

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.

Autres remarques

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

Produit(s) apparenté(s)

Réf. du produit
Description
Tarif

Pictogrammes

Skull and crossbones
GHS06

Mention d'avertissement

Danger

Mentions de danger

H300

Classification des risques

Acute Tox. 2 Oral

Code de la classe de stockage

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

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

Certificats d'analyse (COA)

Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".

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Waleed Al Abdulmonem et al.
Journal of reproductive immunology, 141, 103152-103152 (2020-06-11)
During first trimester of human pregnancy, the maternal system develops immunity against infection and to provide protection of allogeneic foetus from abortion. This study was undertaken to determine the role of trophoblast specific CD74 isoforms in first trimester trophoblast derived
Peipei Zhang et al.
Science advances, 7(43), eabi9471-eabi9471 (2021-10-23)
[Figure: see text].
Jonathan J Hansen et al.
Inflammatory bowel diseases, 15(6), 890-899 (2009-01-13)
While others have described gene expression patterns in humans with inflammatory bowel diseases and animals with chemically induced colitis, a genome-wide comparison of gene expression in genetically susceptible animals that develop spontaneous colitis has not been reported. We used microarray
Tao Ni et al.
Science advances, 6(5), eaax8286-eaax8286 (2020-02-18)
Perforin-2 (MPEG1) is thought to enable the killing of invading microbes engulfed by macrophages and other phagocytes, forming pores in their membranes. Loss of perforin-2 renders individual phagocytes and whole organisms significantly more susceptible to bacterial pathogens. Here, we reveal
Arjen van den Berg et al.
Respiratory research, 6, 111-111 (2005-09-28)
The adenoviral protein E1A has been proposed to play a role in the pathophysiology of COPD, in particular by increasing IL-8 gene transcription of lung epithelial cells in response to cigarette smoke-constituents such as LPS. As IL-8 production is also
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