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L2637

Sigma-Aldrich

脂多糖 来源于大肠杆菌 055:B5

purified by gel-filtration chromatography

同義詞:

LPS

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About This Item

CAS號碼:
EC號碼:
MDL號碼:
分類程式碼代碼:
12352201
NACRES:
NA.25
暫時無法取得訂價和供貨情況

生物源

Escherichia coli (O55:B5)

品質等級

形狀

lyophilized powder

純化經由

gel-filtration chromatography

雜質

<3% Protein

顏色

white to faint gray

溶解度

water: soluble

運輸包裝

ambient

儲存溫度

2-8°C

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一般說明

这种产品是从大肠杆菌中提取的大肠杆菌血清型O55:B5,通过凝胶过滤纯化。源菌株是CDC 1644-70。脂多糖O55:B5已被用于以1纳克/毫升刺激人腹膜巨噬细胞,并以1-100纳克/毫升刺激马腹膜巨噬细胞。

應用

脂多糖(LPS)是革兰氏阴性细菌细胞壁的特征组分。脂多糖及其脂质 A 部分通过 Toll 样受体 4(TLR4)刺激先天免疫系统的细胞,Toll 样受体 4是 Toll 样受体蛋白家族的成员,其识别常见的病原体相关分子模式(PAMP)。

生化/生理作用

脂多糖位于膜的外层,在非包膜菌株中,暴露在细胞表面。它们有助于外膜的完整性,保护细胞免受胆盐和亲脂性抗生素的作用。

準備報告

该产品可溶于水(5毫克/毫升)或细胞培养基(1毫克/毫升),产生一种朦胧的淡黄色溶液。在涡旋并升温至70-80 oC温度后,在盐水中获得了更浓但仍模糊的溶液(20毫克/毫升)脂多糖是在每种溶剂中形成胶束的分子。在水和磷酸盐缓冲盐水中观察到混浊的溶液。有机溶剂不能提供更清晰的溶液。甲醇产生带有漂浮物的混浊悬浮液,而水产生均匀混浊的溶液。

其他說明

为了全面了解我们针对客户研究提供的各种脂多糖产品,建议您访问我们的碳水化合物分类页面。

象形圖

Skull and crossbones

訊號詞

Danger

危險聲明

危險分類

Acute Tox. 2 Oral

儲存類別代碼

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

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)


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分析證明 (COA)

Lot/Batch Number

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存取文件庫

John Bienenstock et al.
PloS one, 8(10), e76236-e76236 (2013-10-08)
Human milk oligosaccharides (HMO) are being studied by different groups exploring a broad range of potential beneficial effects to the breastfed infant. Many of these effects have been attributed to a growth promotion effect on certain gut organisms such as
Yunru Ren et al.
Water research, 154, 153-161 (2019-02-21)
Aerosolized reclaimed water can cause inflammatory responses in lung after inhalation, and endotoxin has been identified as the main inducer. Since the effects of disinfection treatments on endotoxins had conflicting results, this study explored the changes of endotoxin activity and
Francisco J Quintana et al.
PloS one, 3(10), e3509-e3509 (2008-10-24)
B-cells integrate antigen-specific signals transduced via the B-cell receptor (BCR) and antigen non-specific co-stimulatory signals provided by cytokines and CD40 ligation in order to produce IgG antibodies. Toll-like receptors (TLRs) also provide co-stimulation, but the requirement for TLRs to generate
Zili Zhai et al.
Inflammation, 36(2), 346-354 (2012-10-12)
The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) is commonly used to study free radicals. Due to its free radical trapping properties, DMPO is thought to reduce free radial-mediated oxidative damage and other related cellular responses. The purpose of this study
J Vier et al.
Cell death & disease, 7, e2103-e2103 (2016-02-20)
Neutrophil granulocytes are innate effector cells of the first line of defense against pyogenic bacteria. Neutrophil lifespan is short, is prolonged by pro-inflammatory stimuli, controls functionality of the cells and can determine tissue damage. Experimental analysis of primary neutrophils is

文章

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

相關內容

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

脂多醣 (LPS) 是革蘭氏陰性細菌的主要成分,對微生物研究非常重要。

Questions

1–4 of 4 Questions  
  1. 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?

  2. 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/449/386/product-dating-information-mk.pdf

      Helpful?

  3. What is the molecular weight of this product ?

    1 answer
    1. Lipopolysaccharides(LPS) are heterogeneous and do not have fully defined molecular weights. In the presence of strong surface active agents, and in the absence of divalent cations, LPS will have molecular weights in the range of 10?20 kDa. Please see the link below to review additional information regarding the nature of LPS, including molecular weight variability:
      https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/research-and-disease-areas/cell-signaling/lipopolysaccharides

      Helpful?

  4. Can I use DPBS to dilute? or just use water?

    1 answer
    1. This product is tested for solubility at 5 mg/mL in water. Aqueous buffers such as DPBS are expected to be suitable as well. Pease see the link below to review a reference that may be helpful:
      https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5685187/

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