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DynabeadsTM MyOneTM Streptavidin T1

Dynabeads® MyOneTM Streptavidin T1

Company: Thermo Fisher Scientific
Catalog#: 65601
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Tethered Chromosome Conformation Capture Sequencing in Triticeae: A Valuable Tool for Genome Assembly
Author:
Date:
2018-08-05
[Abstract]  Chromosome conformation capture sequencing (Hi-C) is a powerful method to comprehensively interrogate the three-dimensional positioning of chromatin in the nucleus. The development of Hi-C can be traced back to successive increases in the resolution and throughput of chromosome conformation capture (3C) (Dekker et al., 2002). The basic workflow of 3C consists of (i) fixation of intact chromatin, usually by formaldehyde, (ii) cutting the fixed chromatin with a restriction enzyme, (iii) religation of sticky ends under diluted conditions to favor ligations between cross-linked fragments or those between random fragments and (iv) quantifying the number of ligations events between pairs of genomic loci (de Wit and de Laat, 2012). In the original 3C protocol, ligation frequency was ... [摘要]  染色体构象捕获测序(Hi-C)是一种全面询问细胞核中染色质三维定位的有效方法。 Hi-C的发展可以追溯到染色体构象捕获的分辨率和通量的连续增加(3C)(Dekker et al。,2002)。 3C的基本工作流程包括(i)通常用甲醛固定完整的染色质,(ii)用限制酶切割固定的染色质,(iii)在稀释条件下重新连接粘性末端,以促进交联片段之间的连接或随机片段之间的那些和(iv)量化基因组基因座对之间的连接事件的数量(de Wit和de Laat,2012)。在最初的3C方案中,通过半定量PCR扩增对应于少量基因组位点(“一对一”)的选定连接接头来测量连接频率(Dekker et al。,2002 )。然后,染色体构象捕获芯片(4C)和染色体构象捕获碳复制(5C)技术扩展3C以分别以“一对多”或“多对多”方式计算结扎事件。 Hi-C(Lieberman-Aiden et al。,2009)最终将3C与下一代测序相结合(Metzker,2010)。此处,在再连接之前,用生物素标记的核苷酸类似物填充粘性末端以在后续步骤中富集具有连接连接的片段。然后对Hi-C文库进行高通量测序,并将得到的读数映射到参考基因组,允许以“多对多”方式确定接触概率,其分辨率仅受限制性位点的分布限制和阅读深度。 Hi-C的首次应用是阐明人类基因组中的全球染色质折叠原理(Lieberman-Aiden et ...

Isolation of Highly Pure Primary Mouse Alveolar Epithelial Type II Cells by Flow Cytometric Cell Sorting
Author:
Date:
2016-11-20
[Abstract]  In this protocol, we describe the method for isolating highly pure primary alveolar epithelial type II (ATII) cells from lungs of naïve mice. The method combines negative selection for a variety of lineage markers along with positive selection for EpCAM, a pan-epithelial cell marker. This method yields 2-3 x 106 ATII cells per mouse lung. The cell preps are highly pure and viable and can be used for genomic or proteomic analyses or cultured ex vivo to understand their roles in various biological processes. [摘要]  在这个协议,我们描述从初始小鼠的肺分离高纯度原发性肺泡上皮细胞类型(ATII)细胞的方法。该方法结合对多种谱系标志物的阴性选择以及对于Ep上皮细胞标记物EpCAM的阳性选择。该方法每小鼠肺产生2-3×10 6个ATII细胞。细胞制品是高度纯的和可行的,并且可以用于基因组或蛋白质组分析或培养离体以了解他们在各种生物过程中的作用。

[背景] 肺的内表面由上皮细胞排列,上皮细胞的类型在形态上和功能上随着肺内的位置而变化。 ATII细胞是两种类型的上皮细胞中的一种,其排列在肺泡壁上并且已经被描述为在表面活性剂合成和分泌中起关键作用。它们也是肺内第一道防线的一部分,并且涉及在肺部感染或过敏期间引发和调节免疫应答。它们还被认为在远端肺中充当具有增殖能力和损伤后修复上皮的能力的祖细胞。 ATII分离的可用方法不产生超过80-85%纯度的细胞制品,使得它们不适合于mRNA和蛋白质表达的可靠分析。本文所述的方法是对现有方法的改进,并产生具有最高纯度的小鼠原代ATII细胞制备物,因此可以可靠地用于表达分析。对于该方法的进一步讨论,我们将读者指向该协议起源的原始出版物(Sinha等人,2016)。

A Ribosome Footprinting Protocol for Plants
Author:
Date:
2016-11-05
[Abstract]  Ribosome footprinting, or Ribo-seq, has revolutionized the studies of translation. It was originally developed for yeast and mammalian cells in culture (Ingolia et al., 2009). Herein, we describe a plant-optimized hands-on ribosome footprinting protocol derived from previously published procedures of polysome isolation (Ingolia et al., 2009; Mustroph et al., 2009) and ribosome footprinting (Ingolia et al., 2009; Ingolia et al., 2013). With this protocol, we have been able to successfully isolate and analyze high-quality ribosomal footprints from different stages of in vitro grown Arabidopsis thaliana plants (dark-grown seedlings [Merchante et al., 2015] and 13-day-old plantlets in plates and plants grown in liquid ... [摘要]  核糖体足迹或Ribo-seq,彻底改变了翻译研究。它最初是为培养中的酵母和哺乳动物细胞开发的(Ingolia等人,2009)。本文中,我们描述了来自先前公开的多核糖体分离程序的植物优化的亲手核糖体印迹方案(Ingolia等人,2009; Mustroph等人,2009 )和核糖体印迹(Ingolia等人,2009; Ingolia等人,2013)。使用该协议,我们能够成功地分离和分析来自体外生长的拟南芥植物(黑暗生长的幼苗)的不同阶段的高质量核糖体印迹[Merchante < ,以及在液体培养物中生长的板和植物中的13天龄小植物[未发表的结果])。

[背景] 翻译在调节基因活性中的中心作用早已被公认,但是在响应于特定刺激的全基因组翻译定量变化的系统探索最近才变得技术上可行。最初为培养中的酵母和哺乳动物细胞开发的核糖体印迹技术(通常称为Ribo-seq)已经彻底改变了翻译调节和基因表达的研究,因为其允许确定核糖体在基因组 - ...

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