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Chloroform for analysis

Company: Merck
Catalog#: 102445
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Generation of Gene Knockout and Gene Replacement with Complete Removal of Full-length Endogenous Transcript Using CRISPR-Trap
Author:
Date:
2018-10-20
[Abstract]  This protocol describes the application of the CRISPR-Trap from designing of the gene targeting strategy to validation of successfully edited clones that was validated on various human cell lines, among them human induced pluripotent stem cells (hiPSCs). The advantage of CRISPR-Trap over conventional approaches is the complete removal of any endogenous full-length transcript from the target gene. CRISPR-Trap is applicable for any target gene with no or little coding sequence in its first exon. Several human cell lines and different genes have so far been edited successfully with CRISPR-Trap. [摘要]  该协议描述了CRISPR-Trap从设计基因靶向策略到验证成功编辑的克隆的应用,所述克隆在各种人细胞系上得到验证,其中人类诱导的多能干细胞(hiPSC)。 CRISPR-Trap优于常规方法的优点是从靶基因完全去除任何内源全长转录物。 CRISPR-Trap适用于在其第一个外显子中没有编码序列或编码序列很少的任何靶基因。 到目前为止,已经使用CRISPR-Trap成功编辑了几种人细胞系和不同基因。

【背景】CRISPR / Cas9技术的出现促进了基因敲除和基因编辑的基因组靶向。执行敲除的常规方法依赖于引入移码导致过早终止密码子(PTC),截短开放阅读框(ORF)以及随后通过无义介导的mRNA衰变(NMD)降解靶基因的转录物。 。这种方法的一个可能的缺陷是全长转录物,其可以逃避NMD并产生具有残余或甚至显性负功能的C末端截短蛋白。该协议提出了CRISPR-Trap,这是我们最近建立的一种方法(Reber et al。>,2018),成功编辑后将阻止从靶基因位点表达任何全长转录本(图1)。简而言之,这种方法针对CRISPR / ...

Root Gall Formation, Resting Spore Isolation and High Molecular Weight DNA Extraction of Plasmodiophora brassicae
Author:
Date:
2018-06-05
[Abstract]  Isolation of DNA from obligate biotrophic soil-borne plant pathogens is challenging. This is because of their strict requirement of living plant tissue for their growth and propagation. A soil habitat further imposes risk of contamination from other microorganisms living in close vicinity of the plant roots. Here we present a protocol on how to prepare DNA suitable for advanced molecular analysis on the soil-borne pathogen Plasmodiophora brassicae, a peculiar unicellular plant pathogenic organism, causing disease on Crucifers. First, it is important to grow Brassica or Arabidopsis plants in infested soils below a temperature of 25 °C under moist conditions to promote root gall formation. Root galls should be harvested ahead of initiation of the decomposing ... [摘要]  从专性营养型土壤植物病原体中分离DNA是具有挑战性的。这是因为他们对植物生长和繁殖的严格要求。土壤栖息地进一步增加了居住在植物根部附近的其他微生物污染的风险。在这里,我们提出了一个关于如何制备适用于土传病原体Plasmodiophora brassicae ,一种特殊的单细胞植物致病生物,导致十字花科病的DNA进行DNA分析的方案。首先,在潮湿条件下,在温度低于25°C的条件下,在感染的土壤中种植芸薹属植物或拟南芥属植物对于促进根gall形成是重要的。在分解过程开始之前,不应迟于接种拟南芥或芜菁植株后四或九周,收获根gall。数量减少的土壤生物的休息孢子通过匀浆gall组织的梯度离心获得。用70%酒精和一套不同的抗生素治疗可促进 P。芸苔纯度。基于CTAB的程序允许分离适合大规模平行测序分析的高质量DNA。

【背景】Plasmodiophora brassicae 是一种土壤传播的植物病原体,其在包括拟南芥属的十字花科家族中引起根虫(棒状杆菌)。根肿病对全世界油菜(油菜)和卷心菜的种植有重大影响。 P上。 brassicae 是指定给超级组Rhizaria的一种专性生物营养素(需要一种生长寄主),Rhizaria是研究最少的真核生物组之一(Sierra等人,2016; Sibbald和Archibald, 2017年)。系统发育上, ...

Identification and Quantification of Secondary Metabolites by LC-MS from Plant-associated Pseudomonas aurantiaca and Pseudomonas chlororaphis
Author:
Date:
2018-01-20
[Abstract]  Increased antibiotic resistance of plants and human pathogens and continuous use of chemical fertilizers has pushed microbiologists to explore new microbial sources as potential antagonists. In this study, eight strains of Pseudomonas aurantiaca and Pseudomonas chlororaphis, have been isolated from different plant sources and screened for their antagonistic and plant growth promoting potential (Shahid et al., 2017). All strains were compared with reference strain PB-St2 and their secondary metabolites were isolated by the use of solvent partitioning and subjected to LC/ESI/MS for confirmation of compounds. The ESI-mass spectra obtained were used to characterize the surfactants ionization behavior and [M + H]+ and [M + Na]+ ions were ... [摘要]  哺乳动物正呼吸道病毒(呼肠孤病毒)利用成孔肽穿透宿主细胞膜。 在病毒进入过程中,这一步对于提供含核心颗粒的基因组至关重要。 该协议描述了用于测量呼肠孤病毒诱导的孔形成的体外测定。

【背景】呼肠孤病毒是无包膜的双链RNA病毒,其由两个同心蛋白质壳组成:内衣壳(核心)和外衣壳(Dryden等人,1993; Zhang等人, / ,2005; Dermody et al ,2013)。在附着之后,病毒颗粒被内吞(Borsa et al。,1979; Ehrlich et al。,2004; Maginnis et al。,2006; Maginnis和宿主组织蛋白酶蛋白酶降解σ3外壳蛋白(Chang和Zweerink,1971; Silverstein等人,1972; Borsa等人,et al。 1981; Sturzenbecker等人,1987; Dermody等人,1993; Baer和Dermody,1997; Ebert等人, 2002年)。这个过程产生一个亚稳中间体,称为感染性亚病毒颗粒(ISVP),其中细胞穿透蛋白μ1被暴露(Dryden等人,1993)。呼肠孤病毒ISVPs进行第二次构象改变以将含有基因组的核心沉积到宿主细胞的细胞质中。被改变的粒子被称为ISVP *(Chandran et al。,2002)。 ISVP-to-ISVP ...

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