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L4516

Lipopolysaccharides from Escherichia coli O127:B8

BioXtra, suitable for cell culture, γ-irradiated

Sinónimos:

LPS

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Tamaño de envaseSKUDisponibilidadPrecio
1 mg
Comprobar disponibilidad del carrito
$65.500

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Número CAS:
UNSPSC Code:
12352211
EC Number:
297-473-0
NACRES:
NA.75
MDL number:

$65.500


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biological source

Escherichia coli (O127:B8)

Quality Segment

sterility

γ-irradiated

product line

BioXtra

form

lyophilized powder

purified by

gel-filtration chromatography

technique(s)

cell culture | mammalian: suitable

impurities

<1% Protein (Lowry)

solubility

H2O: 5 mg/mL, slightly hazy

storage temp.

2-8°C

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).
Lipopolysaccharides from Escherichia coli 0127:B8 has been used:
  • to study the LPS-induced macrophage survival in mice[1]
  • to elicit the secretion of cytokines by cattle PBMC[2]
  • to study apoptosis of highly susceptible macrophage cells in a LPS-induced proinflammatory environment[1]
  • to perform autophagy assay in BV2 and BV2-LC3 cells[3]
  • for stimulation of human monocytes, macrophages and mouse microglia cells[4][5][6][7]
  • to induce pentraxin-3 expression in 293T cells[8]

Biochem/physiol Actions

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). Being an immunogenic antigen, it enhances immune responses to soluble antigens.[9][10]

Preparation Note

Lipopolysaccharides are supplied as lyophilized, γ-irradiated powders. To reconstitute, add 1 ml sterile balanced salt solution or tissue culture medium to the vial (1 mg) and gently swirl until the powder dissolves. Reconstituted product may be further diluted to desired working concentrations using sterile balanced salt solution or tissue culture medium.

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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Este artículo
L2654L4391L6529
biological source

Escherichia coli (O127:B8)

biological source

Escherichia coli (O26:B6)

biological source

Escherichia coli (O111:B4)

biological source

Escherichia coli (O55:B5)

technique(s)

cell culture | mammalian: suitable

technique(s)

cell culture | mammalian: suitable

technique(s)

cell based assay: suitable, cell culture | mammalian: suitable

technique(s)

cell culture | mammalian: suitable

Quality Level

200

Quality Level

300

Quality Level

300

Quality Level

300

solubility

H2O: 5 mg/mL, slightly hazy

solubility

H2O: 5 mg/mL, slightly hazy

solubility

H2O: 5 mg/mL, slightly hazy

solubility

H2O: 5 mg/mL, faintly hazy to hazy

form

lyophilized powder

form

lyophilized powder

form

lyophilized powder

form

lyophilized powder

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C


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pictograms

Skull and crossbones

signalword

Danger

hcodes

Hazard Classifications

Acute Tox. 2 Oral

Clase de almacenamiento

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



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Artículos

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

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Número de artículo de comercio global

SKUGTIN
L4516-1MG04061833957578

Questions

1–4 of 4 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  3. Once reconstituted what is the stability at -20C for the LPS product L4516-1M?

    1 answer
    1. Frozen aliquots can be stored up to 2 years. For more information, please see the link below:
      https://www.sigmaaldrich.com/technical-documents/protocol/clinical-testing-and-diagnostics-manufacturing/bacteriology/lipopolysaccharides

      Helpful?

  4. Can LPS bind to plastics (ex. 1.5 mL microtube) even when LPS solution is frozen stored at -20℃? I store LPS solution at 0.05mg/mL in -20℃ now.

    1 answer
    1. LSP is less likely to stick to plastics than glass, however very low concentrations (<0.1 mg/mL in water), LPS tends to stick to containers made
      of certain types of glass or plastic. To minimize, prepare stock solutions of at least 1 mg/mL. If the LPS concentration is >1 mg/mL, adsorption to the sides of the vial is
      negligible. For solutions stored in glass, vortexing for 30 minutes following thaw is recommended to redissolve. This may be useful for dilute solutions in plastic, as well. Surfaces (glass and plastics) may be salinized to reduce adherence.

      See Sigmacote, SL2:
      https://www.sigmaaldrich.com/product/sigma/sl2

      For additional information, see the link below to review the Lipopolysaccharides product information page:
      https://www.sigmaaldrich.com/technical-documents/protocol/clinical-testing-and-diagnostics-manufacturing/bacteriology/lipopolysaccharides

      Helpful?

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