RandominsertionofR6KoriginforrescueofflankingDNAorplasmids
- InsertR6KoriginrandomlyintoanyDNAsequenceinvitro
- Skipprimerwalking-simplifySangersequencingoflargeDNAinserts
- RescueclonesinE.colihostexpressingthepirgeneproduct
- MinimizeinsertionbiaswiththehyperactiveTn5system,knownforhighestlevelofrandomness
Applications
- "Rescue"ofplasmidsoranyothercircularizedDNA(e.g.,mitochondrialDNA)thatwouldnototherwisereplicateinE.colibecausetheylackarecognizableoriginofreplicationand/oraselectableMarker.
- PreparationofDNAsequencingtemplatesfromtransposoninsertioncloneswithoutprimerwalkingoradditionalsubcloning.
- Creationofalibraryofrandomgeneknockoutsinvitrotofacilitategeneticanalysisofplasmid-encodedgenes.
TheEZ-Tn5™<R6Kγori/KAN-2>InsertionKit*facilitatesthesequencingandgeneticanalysisofplasmidsoranyothercircularizedDNAthatwouldnototherwisereplicateinE.coli.1,2ThekitisbasedupontheEZ-Tn5™<R6Kγori/KAN-2>TransposonwhichcarriestheE.coliR6Kγconditionaloriginofreplication(R6Kγori)andakanamycinresistancemarker.Asimple,one-step,2-hourinvitroreactionrandomlyinsertsthetransposonintothetargetDNA.ThenanaliquotofthereactionisusedtotransformanE.colihostexpressingthepirgeneproduct,whichisrequiredforreplicationfromtheR6Kγori.Insertionclonesareselectedonkanamycinplatesandcanbesequencedbidirectionallyusingtheprovidedprimersthatarehomologoustotheendsofthetransposon.ClonescanbemaintainedinEpicentre'sTransforMax™EC100D™pir+orTransforMax™EC100D™pir-116strains.3
Figure1.AplasmidcontainingtheEZ-Tn5™<R6Kγori/KAN-2>TransposoncanbemaintainedinTransforMax™EC100D™pir+cellsat~15copiespercell(Lanes1-4)orTransforMax™EC100D™pir-116cellsat~250copiespercell(Lanes5-8).ColoniesfromrandomlychosencloneswereprocessedusingtheColonyFast-Screen™Kit.A5-microliteraliquotoflysatewasloadedperlane.M,supercoiledDNAladder. |
References
- Jendrisak,J.etal.(2002)EpicentreForum9(1),14.
- Yoon,Y.andKoob,M.(2003)EpicentreForum10(2),10.
- Metcalf,W.W.etal.(1994)Gene138,1.
*Coveredbyissuedand/orpendingpatents,exclusivelylicensedorassignedtoEpicentre®(anIllumina®Company).
ORDERINFORMATION
EZ-Tn5™Transposase,EZ-Tn5™<R6Kyori/KAN-2>Transposon,EZ-Tn5™10XReactionBuffer,EZ-Tn5™10XStopSolution,ForwardandReversePrimers,ControlTargetDNA,SterileWater.ebiomall.com
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质粒转染一般是说DNA转染,用常用的sinofection等转染试剂就可以;
小干扰RNA(Small interfering RNA;siRNA)有时称为短干扰RNA(short interfering RNA)或沉默RNA(silencing RNA),是一个长20到25个核苷酸的双股RNA,这种RNA的转染需要用专门的RNA转染试剂。
想用RNAiMAX或者lipo2000转染siRNA,但是看了下转染试剂的说明书和锐博的siRNA说明书,觉得分别对siRNA的用量描述差别挺大的呀,不知道到底该参考哪个呢。
以24孔板为例在siRNA说明书中写到,siRNA终浓度是50nM的话,加入浓度为20μM的siRNA1.25ul,每孔体积是500ul,那这样的话,每孔最终siRNA的量是25pmol。
但是在RNAiMAX或者是lipo2000说明书中,一个写的每孔siRNA用量是5pmol,一个是500ng,这与siRNA厂家所提供的量相差也太多了吧。
到底该看哪一个呢。
ps.一旦siRNA的量和体积确定下来之后,转染试剂的量和siRNA1:1的加就可以了吗?
请各位大神解答。
1.siRNA说明书中的用量,红线圈出
2.RNAIMAX说明书中siRNA的用量。
3.lipo2000说明书中siRNA用量
如题,PolyplusTransfection转染试剂在中国区的代理商有哪些?求推荐1-2个靠谱的,谢谢!
内毒素是革兰氏阴性菌细胞壁(cellwall)上的特有成分,主要是脂多糖中的类脂A,在细菌被裂解时被释放出来,由于其化学结构和特性,在质粒的纯化过程中很容易混入质粒DNA一同提取出来。内毒素的存在会严重的影响质粒转染细胞的效率,此外会激活造血细胞(如B细胞、巨噬细胞等)的非特异免疫反应,造成实验的假阳性,所以转染级质粒的提取纯化必须去除内毒素。
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