This protocol was designed to generate directionally end-labeled probes for DNaseI footprinting but it can be used for any application that requires end-labeled DNA probes.Solutions10 mM dNTP StocksTh ...
Labeling oligonucleotides with 32P ATPSteve HahnLast modified 8/13/01Wear gloves throughout and work in radiation area. Monitor area before and after use.Mix the following in an eppendorf tube:1. 0.5 ...
NCBI的“electronic PCR(e-PCR)”工具是UniSTS资源库的一部分,可以用来寻找一段目的DNA片段中的STS标记物。UniSTS (http://www.ncbi.nih.gov/genome/sts/ ) 能提供所有有关STS标记物的资料,包括引物序列、产物大小、作图信息和别名。与之相链接的其他NCBI资源如Entrez、LocusLink 和MapViewer 也同样提供 ...
(1)诊断技术分类 1)根据目的基因是否被放大分类可分为杂交法和扩增法。前者被检测的目的基因不被放大,如分支链DNA技术,但用杂交法可以进一步检测经过放大了的基因片段,如PCR产物杂交分析;后者包括PCR及连接酶链反应,Qβ复制酶系统等。 2)根据被测基因的核酸类型分类①在杂交法中,Southern印迹用于检测DNA;Northern印迹用于检测RNA;斑点印迹或称 ...
来自加拿大多伦多大学,多伦多成瘾与心理卫生研究中心,以及瑞士,澳大利亚的研究者在最新一期的Nature Genetics发表研究成果,该研究文章在遗传学方面提出了新的问题,质疑DNA作为唯一遗传物质的学说。一直以来,经典的遗传学说认为DNA是遗传信息的载体,人类所有的信息都存在于这个小小的染色体上。从父母亲那遗传来的形状取决于DNA序列。文章作者Art Petronis教授否定了这一论断,他认为D ...
实验目的 1、掌握最常用的提取质粒DNA的方法和检测方法;2、了解制备原理及各种试剂的作用。实验原理 碱裂解法是基于DNA的变性与复性差异而达到分离目的的。碱性使质粒DNA变性,再将pH值调至中性使其复性,复性的为质粒DNA,而染色体DNA不会复性,缠结成网状物质,通过离心除去。 细菌质粒是一类双链、闭环的DNA,大小范围从1kb至200kb以上不等。各种质粒都是存在于细胞质中、独立于细胞染 ...
一、原理:在浓氯化钠(1―2mol/L)溶液中,脱氧核糖核蛋白的溶解度很大,核糖核蛋白的溶解度很小,在稀氯化钠(0.14 mol/L)溶液中,脱氧核糖核蛋白的溶解度很小,核糖核蛋白的溶解度很大。因此,可利用不同浓度的氯化钠溶液,将脱氧核糖核蛋白和核糖核蛋白从样品中分别抽提出来。将抽提得的核蛋白用SDS(十二烷基硫酸钠)处理,DNA或(RNA)即与蛋白质分开,可用氯仿―异戊醇将蛋白质沉淀除去,而DN ...
真核细胞基因组提取 一. 实验目的及背景 高等动物,高等植物的基因组相当宠大, 如人类细胞基因组由30亿个碱基对组成,果蝇基因组有1.4×108个碱基对,水稻基因组有1.4×109个碱基对。真核细胞基因组中,约1万-1.5万个可表达的结构基因,其它大量存在的是调控序列和内含子序列。可以说某特定物种的基因组,包含了该物种生长,发育,繁殖等各项生理活动的几乎全部信息量,因而对真核细胞基因组的结构,组成 ...
一、目的 掌握植物基因组DNA提取的一般方法及注意事项。大分子量DNA分子的酶切分析。二、原理十六烷基三乙基溴化胺是一种去污剂,可溶解细胞膜,它能与核酸形成复合物,在高盐溶液中(0.7mol/L NaCl)是可溶的,当降低溶液盐浓度到一定程度(0.3 mol/L NaCl)时,从溶液中沉淀,通过离心就可将CTAB与核酸的复合物同蛋白质、多糖类物质分开,然后将CTAB与核酸的复合物沉淀溶解于高盐溶液 ...
作分子生物学实验,核酸纯化、酶切、克隆算是最基本的步骤了。因为要做定向克隆,通常要作双酶切。为了省时省事儿,我们常常想方设法把两个酶放在一起切。可是事情并非总那么称心如意――两个酶经常在一起闹别扭,不是反应温度不同啦,就是Buffer不同,有时候两个酶切位点连在一起,必须先切一个再切另一个,否则就切不动――因为有的酶除了识别位点之外还需要旁边留有几个碱基,如果正好被切掉了就出问题。于是有人就到处找 ...
This is a modification of the procedure in Short Protocols (1-411-45)1. Prepare a 50 ml liquid lysate:A. mix 2xlO8 E. coli cells with 100 ul phage (from one picked plaque in 500 ul SM) and100 ul lOmM ...
Use of oligonucleotides in various research applications requires certain basic storage and handling techniques in order to ensure trouble-free experiments. Proper storage of your oligonucleotide will ...
Inoculate 1 ml of L-broth or other rich media with cells of the strain from which genomic DNA is to be isolated. Grow this culture at 37℃ overnight on a roller.Transfer this overnight culture to a 1.7 ...
This protocol was written by Jean-Pierre Issabased on Adams et al.* Kam-Wing Jair has made some useful shortcuts that work well if you are careful.Here is .This assay can be used to measure activity i ...
DNA methylation is an epigenetic event that affects cell function by altering gene expression and refers to the covalent addition of a methyl group catalyzed by DNA methyltransferase (DNMT) to the 5-c ...
FootprintingFootprinting is a method for determining the exact DNA sequence to which a particular DNA-binding protein binds. Examples: hormone-receptor complexes that bind to their hormone response el ...
Contributed by Dr. A. GratchevSingle Nucleotide Primer Extension is a powerful method which can be used for the precise analysis of methylation in a certain position. The procedure is shown on the fig ...
1. DNA DNA template plasmid 5-20 ng 10x pfu DNA polymerase buffer 5.0 µl 25uM oligo 1 0.5 µl 25uM oligo 2 0.5 µl 10mM dNTP 1.0 µl Pfu DNA polymerase (2.5 units) 1.0 µl fill w/ddH2O to 50 µ ...
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The Erase-a-Base® System is designed for the rapid construction of plasmid or M13 subclones containing progressive unidirectional deletions of any inserted DNA . The system is based on the procedure d ...