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Key Documents

L5014

Sigma-Aldrich

Lipopolysaccharides (rough strains) from Escherichia coli J5 (Rc mutant)

Synonym(s):

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 (J5 Rc mutant)

Quality Level

200

form

lyophilized powder

impurities

<3% Protein (Lowry)

color

white to faint beige

solubility

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

shipped in

ambient

storage temp.

2-8°C

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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

Prepared by phenol-chloroform-petroleum ether extraction.
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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Xiaoyu Zhang et al.
Oncology letters, 12(2), 1034-1040 (2016-07-23)
Hypoxia-inducible factor-1α (HIF-1α) and toll-like receptor 4 (TLR4) are involved in numerous mechanisms of cancer biology, including cell proliferation and survival; however the interaction of the two factors under hypoxic conditions remains unclear. The present study investigated the in vitro
M Nashleanas et al.
Infection and immunity, 68(3), 1428-1434 (2000-02-26)
The ability to activate macrophages in vitro for nitric oxide production and killing of Leishmania major parasites is dependent on tumor necrosis factor, although L. major-infected mice lacking the TNF receptor p55 (TNFRp55(-/-) mice) or both the TNFRp55 and TNFRp75
Y Wannemuehler et al.
Journal of clinical microbiology, 27(12), 2881-2883 (1989-12-01)
A monoclonal antibody to the lipopolysaccharide of Moraxella bovis is described. In an indirect fluorescent-antibody test, this monoclonal antibody reacted with 39 of 39 strains of M. bovis tested and did not react with 26 nonfermenting gram-negative coccobacilli other than
Sophie E Hussey et al.
Bioscience reports, 33(1), 37-47 (2012-10-12)
Emerging evidence suggests that TLR (Toll-like receptor) 4 and downstream pathways [MAPKs (mitogen-activated protein kinases) and NF-κB (nuclear factor κB)] play an important role in the pathogenesis of insulin resistance. LPS (lipopolysaccharide) and saturated NEFA (non-esterified fatty acids) activate TLR4

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