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Vial insert, 400 µL, glass, flat bottom

公司名称: Agilent Technologies
产品编号: 5181-3377
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Bacterial Cell Wall Precursor Phosphatase Assays Using Thin-layer Chromatography (TLC) and High Pressure Liquid Chromatography (HPLC)
Author:
Date:
2018-03-20
[Abstract]  Peptidoglycan encases the bacterial cytoplasmic membrane to protect the cell from lysis due to the turgor. The final steps of peptidoglycan synthesis require a membrane-anchored substrate called lipid II, in which the peptidoglycan subunit is linked to the carrier lipid undecaprenol via a pyrophosphate moiety. Lipid II is the target of glycopeptide antibiotics and several antimicrobial peptides, and is degraded by ‘attacking’ enzymes involved in bacterial competition to induce lysis. Here we describe two protocols using thin-layer chromatography (TLC) and high pressure liquid chromatography ... [摘要]  肽聚糖包裹细菌细胞质膜以保护细胞免于因膨胀而导致的溶解。 肽聚糖合成的最后步骤需要称为脂质II的膜锚定底物,其中肽聚糖亚基通过焦磷酸部分连接至载体脂质十一碳烯醇。 脂质II是糖肽抗生素和几种抗微生物肽的靶标,并且通过参与细菌竞争的“攻击”酶来降解以诱导裂解。 在这里,我们分别描述了两种使用薄层色谱法(TLC)和高压液相色谱法(HPLC)的方案来测定磷脂酶如Colicin M或来自中间链球菌的LXG毒素蛋白TelC对脂质II的消化,的。 TLC方法也可以监测十一异戊二烯基(pyro)磷酸盐的消化,而HPLC方法允许分离脂质II的二 - ,单 - 或非磷酸化二糖五肽产物。

【背景】肽聚糖(PG)球囊是一种必需的细菌大分子,它可以保护细胞免受由于其膨胀引起的破裂并保持细胞的形状(Vollmer和Bertsche,2008; Typas等人,2012)。 PG由通过短肽连接的聚糖链组成。来自不同物种的PG在肽的结构和二级修饰的存在方面有所不同(Vollmer等人,2008)。 ...

Root Aliphatic Suberin Analysis Using Non-extraction or Solvent-extraction Methods
Author:
Date:
2017-06-20
[Abstract]  Here we describe both non-extraction and solvent-extraction methods for root aliphatic suberin analysis. The non-extraction method is fast as roots are directly depolymerized using acidic transmethylation. However, suberin aliphatic components are isolated together with all the other acyl chains making up the lipids (e.g., membranes) present in roots. For the solvent-extraction method, roots are first delipidated before transmethylation. This method is longer but allows separation of soluble and polymerized root lipids. This protocol is optimized for tissue culture- or soil-grown Arabidopsis ... [摘要]  在这里我们描述了非提取和溶剂萃取方法的根脂肪族苏维林分析。 非提取方法快速,因为根使用酸性转甲基化直接解聚。 然而,苏维林脂族组分与构成根中存在的脂质(例如膜)的所有其它酰基链一起分离。 对于溶剂萃取方法,首先在转甲基化之前使根脱皮。 该方法较长,但可分离可溶性和聚合的根脂质。 该方案针对组织培养或土壤种植的拟南芥植物进行了优化,但可与其他植物的根一起使用。
【背景】Suberin是沉积在各种组织的细胞壁中的细胞外植物脂质聚合物,例如根内皮,外皮和根周围。 Suberin作为控制水和溶质通量并限制病原体感染的屏障(Ranathunge et al。,2011; Andersen等,2015; Vishwanath等,2015; Barberon等,2016)。 Suberin是由脂类,酚类和甘油组成的复杂杂聚物,与溶剂萃取蜡相关(Bernards,2002)。在拟南芥模拟植物中,苏维林聚合物主要由ω-羟基酸和α,ω-二羧酸制成,但也含有未取代的脂肪酸和伯醇脂肪醇(Domergue等,2010; Vishwanath et al。 2013),而相关的蜡是羟基肉桂酸烷基酯(AHC; Kosma等,2012; ...

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