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Key Documents

L6893

Sigma-Aldrich

脂多糖(粗糙型菌株) 来源于大肠杆菌 F583(Rd 突变体)

别名:

LPS

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About This Item

EC號碼:
MDL號碼:
分類程式碼代碼:
12352201
NACRES:
NA.25

生物源

Escherichia coli (F583 Rd mutant)

品質等級

形狀

lyophilized powder

雜質

<3% Protein (Lowry)

顏色

white to yellow cast

溶解度

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

運輸包裝

ambient

儲存溫度

2-8°C

一般說明

本品是使用苯酚:氯仿:石油醚从大肠杆菌EH 583(Rd突变株)中提取的。来源菌株来自私人保藏。

應用

脂多糖(LPS)是革兰氏阴性菌细胞壁的特征性成分。LPS及其脂质A部分可通过Toll样受体4(TLR4)刺激先天免疫系统细胞,TLR4是Toll样受体蛋白家族的成员,它能识别常见的病原体相关分子模式(PAMP)。

生化/生理作用

脂多糖(LPS)位于膜的外层,并且暴露在无包膜菌株的细胞表面。它们有助于维持外层膜的完整性,并保护细胞免受胆汁盐和亲脂性抗生素的破坏。

準備報告

通过苯酚-氯仿-石油醚萃取进行制备。

本品溶于水(5 mg/ml)或细胞培养基(1 mg/ml),得到浑浊的淡黄色溶液。以盐水为溶剂时,经过涡旋并加热至70-80 oC后,得到浓度更高但仍然浑浊的溶液(20 mg/ml)。脂多糖分子可在各种溶剂中形成胶束。在水和磷酸盐缓冲盐水中,可观察到混浊的溶液。使用有机溶剂不会得到更澄清的溶液。以甲醇为溶剂将得到含漂浮物的混浊悬浮液,而以水为溶剂将得到均匀的混浊溶液。

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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M Worku et al.
Journal of dairy science, 92(7), 3185-3193 (2009-06-17)
The objective of this study was to evaluate the effect of smooth (S) and rough (R) forms of lipopolysaccharide (LPS) on gene expression in bovine blood neutrophils. Isolated neutrophils (10(7) cells/mL) were treated with Escherichia coli LPS serotype O111:B4 (S+R)
Yawen Ni et al.
PloS one, 12(2), e0170346-e0170346 (2017-02-09)
Occludin is a key tight junction (TJ) protein in cerebral endothelial cells (CECs) playing an important role in modulating blood-brain barrier (BBB) functions. This protein (65kDa) has been shown to engage in many signaling pathways and phosphorylation by both tyrosine
Iga Kucharska et al.
Biochemistry, 55(36), 5061-5072 (2016-08-18)
Pseudomonas aeruginosa is an opportunistic human pathogen causing pneumonias that are particularly severe in cystic fibrosis and immunocompromised patients. The outer membrane (OM) of P. aeruginosa is much less permeable to nutrients and other chemical compounds than that of Escherichia
G Werner-Felmayer et al.
Clinical and diagnostic laboratory immunology, 2(3), 307-313 (1995-05-01)
In a number of mammalian cell types, pteridine biosynthesis from guanosine 5'-triphosphate and formation of nitric oxide from L-arginine are induced by gamma interferon (IFN-gamma) and bacterial lipopolysaccharide (LPS). We assessed the possibility of using such metabolic alterations for the

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