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L4268

Sigma-Aldrich

Lipopolysaccharides from Klebsiella pneumoniae

purified by phenol extraction

Synonym(s):

LPS

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About This Item

MDL number:
MFCD00131520
UNSPSC Code:
12352201
NACRES:
NA.25

biological source

bacterial (Klebsiella pneumoniae)

Quality Level

200

form

lyophilized powder

purified by

phenol extraction

impurities

<3% Protein (Lowry)

color

white to faint yellow

solubility

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

shipped in

ambient

storage temp.

2-8°C

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General description

This product is phenol extracted from Klebsiella pneumoniae. The source strain is ATCC 15380.

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 Code

11 - Combustible Solids

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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Nora S Wolff et al.
Intensive care medicine experimental, 8(1), 47-47 (2020-08-26)
The microbiome has emerged as an important player in the pathophysiology of a whole spectrum of diseases that affect the critically ill. We hypothesized that differences in microbiota composition across vendors can influence murine models of pulmonary lipopolysaccharide (LPS) inflammation
Jinling Zhang et al.
Biosensors & bioelectronics, 99, 312-317 (2017-08-09)
We report a smartphone label-free biosensor platform based on grating-coupled surface plasmon resonance (GC-SPR). The sensor system relies on the smartphone's built-in flash light source and camera, a disposable sensor chip with Au diffraction grating and a compact disk (CD)
Teresa García-Lezana et al.
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 37(3), 927-937 (2016-05-08)
Hepatic encephalopathy has traditionally been considered a reversible disorder. However, recent studies suggested that repeated episodes of hepatic encephalopathy cause persistent impairment leading to neuronal loss. The aims of our study were the development of a new animal model that
C Arnold Spek et al.
Cells, 10(9) (2021-09-29)
CCAAT/enhancer-binding protein delta (C/EBPδ) is a member of the C/EBP family of transcription factors. According to the current paradigm, C/EBPδ potentiates cytokine production and modulates macrophage function thereby enhancing the inflammatory response. Remarkably, however, C/EBPδ deficiency does not consistently lead
Sofia Monteiro et al.
Gut, 70(2), 379-387 (2020-04-04)
Systemic inflammation predisposes acutely decompensated (AD) cirrhosis to the development of acute-on-chronic liver failure (ACLF). Supportive treatment can improve AD patients, becoming recompensated. Little is known about the outcome of patients recompensated after AD. We hypothesise that different inflammasome activation
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Lipopolysaccharides

Lipopolysaccharide (LPS) is a major component of Gram-negative bacteria, important for microbiological research.

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