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0.22 µm Millex-GP polyethersulphone membrane filter

Company: Millipore
Catalog#: SLGP033RS
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Production and Bioassay of a Diffusible Factor that Induces Gametophyte-to-Sporophyte Developmental Reprogramming in the Brown Alga Ectocarpus
Author:
Date:
2020-09-20
[Abstract]  The brown alga Ectocarpus has a haploid-diploid life cycle that involves alternation between two multicellular generations, the sporophyte and the gametophyte. Life cycle generation is not determined by ploidy but by a genetic system that includes two different three amino acid loop extension homeodomain transcription factors called OUROBOROS and SAMSARA. In addition, sporophytes have been shown to secrete a diffusible factor into the medium that can induce gametophyte initial cells to switch from the gametophyte to the sporophyte developmental program. The protocol presented here describes how to produce sporophyte-conditioned medium containing the diffusible sporophyte-inducing factor and how to assay for activity of the factor using a meio-spore-based bioassay. The protocol, ... [摘要]  [摘要 ] 褐藻赤藓皮果的单倍体-二倍体生命周期涉及孢子体和配子体两个多细胞世代之间的交替。生命周期的产生不是由倍性决定的,而是由一个遗传系统决定的,该遗传系统包括两个不同的三个氨基酸环延伸同源域转录因子,称为OUROBOROS和SAMSARA。另外,已经显示孢子体将可扩散因子分泌到培养基中,该因子可诱导配子体初始细胞从配子体转换为孢子体发育程序。该协议呈现这里描述了如何以产生含有扩散孢子体诱导因子孢子体条件培养基,以及如何测定用于使用该因子的活性杜梅尤-spore基于生物测定。该协议描述了如何优化这些程序的几个步骤,将为将来的工作提供有用的工具,旨在表征可扩散因素并研究其作用方式。

[背景 ] 水云是已被采纳为这个组的海藻遗传模型生物体一个小的,丝状褐藻(彼得斯等人,2004; Coelho的等人,2012A) 。褐藻显示出广泛的不同生命周期(Cock 等,201 4 )。腕果具有单倍体-二倍体的生命周期(图1),涉及两个多细胞世代,配子体和孢子体之间的交替(Müller,1967; Bothwell ...

HIV-CRISPR: A CRISPR/Cas9 Screening Method to Identify Genes Affecting HIV Replication
Author:
Date:
2020-05-05
[Abstract]  Screening with CRISPR/Cas9 technology has already led to significant discoveries in the fields of cancer biology, cell biology and virology. Because of the relatively low false discovery rates and the ability to perform high-throughput, pooled approaches, it has rapidly become the assay of choice for screening studies, including whole-genome screens. Here, we describe a CRISPR screening protocol that allows for efficient screening of the entire life cycle of HIV-1 through packaging of the HIV-CRISPR lentiviral genomes by infecting HIV-1 virus in trans. [摘要]  [摘要 ] CRISPR / Cas9技术的筛选已经在癌症生物学,细胞生物学和病毒学领域引起了重大发现。由于相对较低的错误发现率和执行高通量,合并方法的能力,它发展迅速。成为筛选研究(包括全基因组筛选)的首选检测方法。在此,我们描述了一种CRISPR筛选方案,该方案可通过感染HIV-CRISPR慢病毒基因组来包装,从而有效筛选HIV-1的整个生命周期。病毒1 在 跨。

[背景] 遗传筛选是鉴定影响包括人类免疫缺陷病毒(HIV)在内的病毒复制的新基因的有力工具。鉴定对HIV感染重要的宿主基因有助于增强对HIV复制,进化,传播和发病机制的认识,这是关键利益所在。特别是在过去十年中,通常是干扰素(IFN)刺激基因(ISG)的HIV限制因子的发现已成为逆转录病毒学领域的关键发展。限制因子已集中在过度表达筛选上,以鉴定作用广泛的抗病毒ISG (Schoggins 等,2011)或专门针对HIV的因子(Kane 等,2016)。通过转染对HIV限制因子进行了全基因组筛选siRNA的池池在靶细胞(刘等人,2011年)。然而,这些方法缺乏稳健性,Versa的钛Lity,和高通量方面 因此,我们使用CRISPR / Cas9技术开发了一种创新的ap 方法,并依靠HIV交叉包装通过CRISPR / Cas9文库转导的细胞中表达的慢病毒基因组的能力(OhAinle ...

Rapid Generation of Human Neuronal Cell Models Enabling Inducible Expression of Proteins-of-interest for Functional Studies
Author:
Date:
2020-05-05
[Abstract]  CRISPR-Cas9 technology has transformed the ability to edit genomic sequences and control gene expression with unprecedented ease and scale. However, precise genomic insertions of coding sequences using this technology remain time-consuming and inefficient because they require introducing adjacent single-strand cuts through Cas9 nickase action and invoking the host-encoded homology-directed repair program through the concomitant introduction of large repair templates. Here, we present a system for the rapid study of any protein-of-interest in two neuronal cell models following its inducible expression from the human AAVS1 safe harbor locus. With lox-flanked foundation cassettes in the AAVS1 site and a tailor-made plasmid for accepting coding sequences-of-interest in ... [摘要]  [摘要] CRISPR-Cas9技术以前所未有的简便性和规模改变了编辑基因组序列和控制基因表达的能力。但是,由于需要引入相邻的单链,因此使用该技术进行精确的基因组编码插入仍然很耗时且效率低下。通过减少Cas9切口酶的作用并通过同时引入大型修复模板来调用宿主编码的同源性指导的修复程序。在此,我们提出了一种系统,用于在其诱导后的两个神经元细胞模型中快速研究任何目的蛋白该系统可从人类AAVS1 安全港基因座表达,在AAVS1 位点具有lox侧翼的基础盒和定制的质粒以接受感兴趣的编码序列,该系统使研究人员能够为诱导型产生自己的神经元细胞模型任何编码表达序列不到一个月的时间。由于可用性Preinserted 增强型绿色的Fluo 可以与目标蛋白质融合的最新蛋白质(EGFP)编码序列,该系统可帮助功能研究通过活细胞显微镜以及利用非常有效的可用性进行的相互作用组分析来跟踪目标蛋白质EGFP捕获矩阵。

[背景] ...

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