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Potassium Phosphate Dibasic Anhydrous (Crystalline Powder/Certified ACS), Fisher Chemical

磷酸氢二钾无水(结晶粉/认证ACS),Fisher Chemical

公司名称: Thermo Fisher Scientific
产品编号: P288-500
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Fluorescence in situ Localization of Gene Expression Using a lacZ Reporter in the Heterocyst-forming Cyanobacterium Anabaena variabilis
Author:
Date:
2017-01-05
[Abstract]  One of the most successful fluorescent proteins, used as a reporter of gene expression in many bacterial, plant and animals, is green fluorescent protein and its modified forms, which also function well in cyanobacteria. However, these fluorescent proteins do not allow rapid and economical quantitation of the reporter gene product, as does the popular reporter gene lacZ, encoding the enzyme β-galactosidase. We provide here a protocol for the in situ localization of β-galactosidase activity in cyanobacterial cells. This allows the same strain to be used for both a simple, ... [摘要]  在许多细菌,植物和动物中用作基因表达的报告基因的最成功的荧光蛋白之一是绿色荧光蛋白及其修饰形式,其在蓝细菌中也起良好作用。然而,与编码β-半乳糖苷酶的流行的报道基因lacZ一样,这些荧光蛋白不允许报道基因产物的快速和经济的定量。我们在这里提供了在蓝细菌细胞中原位β-半乳糖苷酶活性定位的方案。这允许将相同的菌株用于具有底物邻硝基苯基-β-半乳糖苷(ONPG)的简单,定量,比色测定,并且用于灵敏的,基于荧光的细胞型定位使用5-十二烷酰氨基荧光素二-β-D-吡喃半乳糖苷(C12-FDG)的基因表达。

背景 鱼腥藻变种是一种丝状蓝细菌,其区分称为异养细胞的特异性细胞,其特异性用于固氮(Kumar等人,2010; Maldener and Muro Pastor,2010)。由于在96孔中易于定量,酶,比色,β-半乳糖苷酶测定,我们使用大肠埃希氏菌的 lacZ 基因作为蓝细菌基因表达的转录报告基因(Griffith和Wolf,2002)和使用相同的菌株用于使用荧光底物5-十二烷基聚氨基荧光素二-β-D-吡喃半乳糖苷(C12-FDG)的原位定位基因表达的能力( Thiel等人,1995; ...

Extraction and Quantification of Tryptophan and Kynurenine from Cultured Cells and Media Using a High Performance Liquid Chromatography (HPLC) System Equipped with an Ultra-Sensitive Diode Array Detector
Author:
Date:
2016-04-05
[Abstract]  Evidence of the involvement of tryptophan and its metabolite, kynurenine, in various biological processes including cancer is constantly expanding. Analysis of cell extracts and culture media can allow for quick snapshots of the metabolic fluctuations occurring in vitro. Here, we describe a method for metabolite extraction from mammalian cells and analysis of extracted metabolites and cell culture media by HPLC with detection using an ultra-sensitive diode array detector. [摘要]  色氨酸及其代谢物,犬尿氨酸参与包括癌症在内的各种生物过程的证据不断扩大。 细胞提取物和培养基的分析可以允许在体外发生的代谢波动的快速快照。 在这里,我们描述了一种从哺乳动物细胞代谢物提取的方法,提取代谢物和细胞培养基通过HPLC检测使用超敏二极管阵列检测器分析。

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