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Microcentrifuge

Company: Eppendorf
Catalog#: 5417 C
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Small-scale DNA Extraction Method for Maize and Other Plants
Author:
Date:
2018-03-20
[Abstract]  Corn, or maize, is a major cereal crop and model monocot. Two of its benefits are ease of pollination and tractable genetics. For a comparison of development between maize and the dicot model, Arabidopsis, see Lunde and Hake, 2005. For an example of how this protocol might be used for a double mutant analysis see Lunde and Hake, 2009. Here, we provide a protocol for easy DNA extraction without phenol or chloroform. Therefore, this protocol is suitable for use in schools or laboratories that lack fume hoods. [摘要]  玉米或玉米是主要的谷类作物和模式单子叶植物。 它的两个好处是易于授粉和易处理的遗传。 为了比较玉米和双子叶植物模型之间的发育,拟南芥参见Lunde和Hake,2005。关于该方案如何用于双突变体分析的例子参见Lunde和Hake,2009。 在这里,我们提供了一个简单的DNA提取方案,无需苯酚或氯仿。 因此,该协议适用于缺乏通风橱的学校或实验室。

Determination of Polyhydroxybutyrate (PHB) Content in Ralstonia eutropha Using Gas Chromatography and Nile Red Staining
Author:
Date:
2018-03-05
[Abstract]  Ralstonia eutropha H16 produces and mobilizes (re-utilizes) intracellular polyhydroxybutyrate (PHB) granules during growth. This protocol describes the visualization of intracellular Nile red stained PHB granules and the quantification of PHB by gas chromatography. Our first method describes how to analyze PHB granules by fluorescence microscopy qualitatively. Our second approach enables the conversion of PHB to volatile hydroxycarboxylic acid methyl esters by acidic methanolysis and their quantification by gas chromatography. Through this method, it is possible to obtain an absolute quantification of PHB, e.g., per cell dry weight. [摘要]  在生长过程中,富养罗尔斯通氏菌H16产生和动员(重新利用)细胞内聚羟基丁酸酯(PHB)颗粒。 该协议描述了细胞内尼罗红染色的PHB颗粒的可视化和通过气相色谱定量PHB。 我们的第一种方法描述了如何通过荧光显微镜定性分析PHB颗粒。 我们的第二种方法可以通过酸性甲醇分解和气相色谱定量法将PHB转化为挥发性羟基羧酸甲酯。 通过该方法,可以获得PHB的绝对定量,例如,每细胞干重。

【背景】聚羟基脂肪酸酯(PHA),尤其是聚羟基丁酸酯(PHB),是许多原核生物物种中的能量和碳储存化合物,确保细菌在压力条件下存活(Anderson和Dawes,1990;Pötter和Steinbüchel,2006; Jendrossek和Pfeiffer,2014; Bresan, >等。,2016)。这些生物聚合物的工业应用是生物降解塑料的生产(Chen,2009; Riedel等人,2015)和潜在药物成分的研究(Wu,2009; Zonari等人, ,2015; Pacheco et al。,2015; Giretova ...

Notch Ligand Binding Assay Using Flow Cytometry
Author:
Date:
2017-12-05
[Abstract]  Notch signaling is an evolutionarily conserved signaling pathway that plays an indispensable role during development, and in the maintenance of homeostatic processes, in a wide variety of tissues (Kopan, 2012; Hori et al., 2013). The multifaceted roles of Notch signaling are stringently regulated at different levels. One of the most important aspects of regulation is the binding of different Notch ligands to each Notch receptor (NOTCH1-NOTCH4). Canonical ligands Delta or Serrate (in Drosophila), and Delta-like (DLL1 and DLL4) or Jagged (JAG1 and JAG2) (in mammals), are transmembrane glycoproteins. Ligands expressed on one cell bind to Notch receptors on an adjacent cell to induce Notch signaling. Glycosylation of Notch receptor extracellular domain by O-fucose and ... [摘要]  Notch信号传导是进化上保守的信号传导途径,在发育过程中以及在各种组织中维持体内平衡过程中起着不可或缺的作用(Kopan,2012; Hori等人,2013)。 Notch信号的多方面作用在不同的层面上受到严格的调控。监管的最重要的方面之一是不同Notch配体与各Notch受体(NOTCH1-NOTCH4)的结合。典型的配体Delta或Serrate(在果蝇中)和Delta样(DLL1和DLL4)或Jagged(JAG1和JAG2)(在哺乳动物中)是跨膜糖蛋白。在一个细胞上表达的配体结合相邻细胞上的Notch受体以诱导Notch信号传导。通过O-岩藻糖和O-GlcNAc聚糖对Notch受体细胞外结构域的糖基化作为Notch信号强度的关键调节剂已经得到很好的确立(Stanley and Okajima,2010; Haltom and Jafar-Nejad,2015; Sawaguchi et al。 >,2017)。为了表征Notch配体与分离细胞中的Notch受体的结合,我们利用人Fc区在C端标记的Notch配体胞外结构域,并通过流式细胞术确定荧光抗Fc抗体的结合。
【背景】众所周知,细胞增殖,分化和凋亡受Notch信号调节。 ...

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