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NaCl (5 M)

NaCl(5M)

Company: Thermo Fisher Scientific
Catalog#: AM9760G
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Low-input Capture-C: A Chromosome Conformation Capture Assay to Analyze Chromatin Architecture in Small Numbers of Cells
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Date:
2017-12-05
[Abstract]  Chromosome conformation capture (3C) techniques are crucial to understanding tissue-specific regulation of gene expression, but current methods generally require large numbers of cells. This protocol describes two new low-input Capture-C approaches that can generate high-quality 3C interaction profiles from 10,000-20,000 cells, depending on the resolution used for analysis. [摘要]  染色体构象捕获(3C)技术对于理解基因表达的组织特异性调节是至关重要的,但是目前的方法通常需要大量的细胞。 该协议描述了两种新的低输入Capture-C方法,根据用于分析的分辨率,可以从10,000-20,000个细胞生成高质量的3C相互作用谱。

【背景】3C技术在调查调控元件之间的核组织和结构相互作用与基因活性之间起关键作用(Dekker等人,2002)。 由于这些相互作用是高度组织特异性的,3C定义的纯化细胞群进行3C实验是至关重要的。

3C技术的一个主要局限性是所需要的大量细胞:目前的方法使用了10万到10万个细胞(Davies等人,2017)。 这些数字中不包含许多原发性组织和稀有细胞群。 因此,我们开发了两种新的低输入Capture-C方法,可以从最大分辨率的〜20,000个细胞(单独的DpnII片段)和使用基于开窗分析的约10,000个细胞产生高质量的相互作用谱(Oudelaar等人 。,2017)。

RNase H Polymerase-independent Cleavage Assay for Evaluation of RNase H Activity of Reverse Transcriptase Enzymes
Author:
Date:
2015-08-20
[Abstract]  The ribonuclease H (RNase H) polymerase-independent cleavage assay allows detection and quantification of RNase H activity of reverse transcriptase (RT) enzymes with a hybrid substrate formed by a fluorescein labeled RNA annealed with Dabcyl DNA (Figure 1). Here we describe a protocol that we have adapted for HIV-1 RT expressed from a p(His)6-tagged p66/p51 HIV-1HXB2 RT-prot plasmid and for RT of the prototype foamy virus (PFV RT).


Figure 1. Scheme of the principle of the experiment. The RNA substrate (blue) labeled with the fluorophore fluorescein (F, yellow) is annealed with complementary DNA strand (green) labeled with a quencher molecule Dabcyl (D, red). Panel ...
[摘要]  核糖核酸酶H(RNase H)聚合酶非依赖性切割测定允许用由与Dabcyl DNA退火的荧光素标记的RNA形成的杂交底物检测和定量逆转录酶(RT)酶的RNA酶H活性(图1)。在这里我们描述了一个协议,我们已适应的艾滋病毒1 RT表示从p(His)6标记的p66/p51艾滋病毒1 HXB2 RT-prot质粒和原型泡沫病毒(PFV RT)RT。



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