Verifying the sequence of an shRNA hairpin is essentialsince mismatch of even one nucleotide within the target sequence can ablate knockdown . An issue that is frequently encountered in the preparatio ...
虽然通过siRNA处理,整个基因的mRNA都受到影响,围绕siRNA周围的区域是受沉默影响最大的区域。就时效性研究来看,编码区是siRNA效应的最稳定区,非翻译区相对稳定性较弱。这与断裂位点和非翻译区之间的距离有关。因此引物最好选择在编码区内的任何位点,为了最大的灵敏度推荐使用围绕着siRNA位点进行设计。为了比较不同的siRNA针对不同的基因的相对沉默效果,最好在选择引物的时候用对于每个目的基因 ...
Nucleic Acids Research 2007 Vol. 35 No. 10 3339-3354S. Smit J. Widmann and R. Knighundefined Department of Chemistry and Biochemistry University of Colorado Boulder CO 80309 Understanding patterns of rRNA ev ...
用siRNA片段还是用shRNA质粒,这个要根据具体情况而定,两种方法都做是一种可行的方法,如果您经费足够。具体使用何种方法进行给药,这个具体情况具体分析,给您一个参考如下:
Reuven AgamiDivision of Tumor Biology - The Netherlands Cancer Institute - Amsterdam (TheNetherlands)r.agami@nki.nlWebpage: http://research.nki.nl/agamilab/Philippe BastinTrypanosome Cell Biology Unit ...
A major impediment in the treatment of neurological diseases is the presence of the blood–brain barrier which precludes the entry of therapeutic molecules from blood to brain. Here we show that a shor ...
不少的文献都说,用LiCl 沉淀RNA有很多好处,比如只沉淀RNA,不会沉淀DNA、蛋白和多糖等。但就是操作比较麻烦,比如,过夜沉淀,不能沉淀小分子RNA等。下面就LiCl 沉淀方法的误区进行探讨。误区一:LiCl 不能沉淀小分子RNA。很多文献都说LiCl 沉淀的RNA不含小分子的5s rRNA和tRNA。但,事实是这样吗?至少在我的实验中发现LiCl 可以沉淀小分子RNA。下面的图片更能说明L ...
Argonaute - A family of proteins containing multiple domains and involved in RNA interference (RNAi). Argonatue is the main component of RNAi effector complex the so called siRNA induced silencing com ...
刚涉及RNA抽提的新手都会听到别人说RNase很顽固,用高压灭菌都无法去除其活性。于是在配制tris缓冲液时就遇到了两难的境地。tris缓冲液不能用DEPC处理,只能用DEPC处理过的水配制,那么在药品称量、调pH值等过程中tris缓冲液会造到RNase的再次污染,所以是一个两难的境地。但是今天我要谈的是RNase并不顽固,高压灭菌可以去除其大量活性。下面的实验照片(照片来自ambion)很清楚的 ...
The BAC clone from glycerol culture sublibrary is innoculated into 3 ml of LB with 20µg/ml chloramphenicol and cultured at 37°C with shaking for 16hrs. The liquid bacterial culture is transferred into ...
I. NEBULIZATION of DNA 1. 0.5 - 5 ug DNA in TE (10mM/1mM) 25% glycerol final volume 500 ul 2. nebulize for 90-100 sec at 5-10 psi (for a medium size of about 1.5kbp) 3. Precipitate with Et ...
BackgroundThis is the method for indirect immunofluorescence labeling; that is the antibodies do not have the fluorescent dye attached. Indirect labeling is more involved than direct labeling. If you ...
Rat liver is an ideal source for functional intact mitochondria for a number of reasons. We use Sprague-Dawley albino male rats for our studies. Female rats can be used however for serious studies we ...
AbstractGene expression and regulation are mediated by DNA sequences in most instances directly upstream to the coding sequences by recruiting transcription factors regulators and a RNA polymerase in ...
) Culture 400 mls of bacteria harboring transposon overnight at 37oC. 2) Harvest cells at 7000xg for 5 min. (pellet can be frozen at -80oC for several weeks) 3) Resuspend pellet thoroughly in 14 mls: ...
在真菌学研究中,传统的菌物分类以形态特征和生理生化指标为分类基础,但大部分菌物的种类多、分布广、形态特征复杂,而且少数形态特征和生理生化指标随着环境的变化而不稳定,因此,传统的菌物分类常引起分类系统的不稳定或意见分歧。近年来随着分子生物学的发展,同时也是真菌学自身发展的客观需求,分子生物学技术在真菌学研究中得到了广泛而深入地应用。一些分类地位不明确、亲缘关系不清楚的物种通过该技术得到了验证。一 ...
IntroductionNorthern blotting nuclease protection assays and RT-PCR are frequently used to analyze gene expression. While qualitative results from these assays are sometimes sufficient most researcher ...
一、什么是克隆技术 克隆,是Clone 的译音,意为无性繁殖。 英语"Clone"一词起源于希腊文"Klone",原意是用"嫩枝"或"插条"繁殖。 现在"克隆"的含义已不仅仅是简单的"无性繁殖",凡来自一个祖先,经过无性繁殖出的一群个体,也叫"克隆"。这种来自一个祖先的无性繁殖的后代群体也叫"无性繁殖系",简称无性系。在自然界,有不少植物具有先天的克隆本能,如番薯、马铃薯、玫瑰等插枝繁殖的植物 ...
做分子生物学实验,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 ...
Note: The pointers in this technical bulletin presuppose the use of standard 50% formamide hybridization solutions. However if ULTRAhyb™ Ambion's ultrasensitive hybridization buffer is used the differ ...