Anoptimizedreversetranscriptasesystemfortheproductionoffull-lengthCDNA.
Producefull-lengthcDNAwithRNAseH-mutant- Achievehigherspecificityatelevatedtemperatures,upto55°C
EpiScript™RnaseH-ReverseTranscriptase(EpiScriptRT),analternativetoSuperScript®IIReverseTranscriptase,isarecombinantMMLVreversetranscriptasewithgreatlyreducedRNaseHactivity.Itishighlyefficientatproducingfull-lengthcDNAfromlongRNAtemplates.EpiScriptRTiscapableofproducingcDNAfromaslittleas50pgoftotalRNAforreal-timeRT-PCR(qRT-PCR)analysisandotherapplications.
Applications
- First-strandcDNAsynthesisforsubsequentPCRorreal-timePCR.
Benefits
- RecombinantMMLVreversetranscriptasewithgreatlyreducedRNaseHactivity
- Activeattemperaturesupto55°C
- Highlyefficientatproducingfull-lengthcDNAfromaslittleas50pgoftotalRNA
- BestvalueinanRNaseH-ReverseTranscriptase
Storage:Storeonlyat-20°Cinafreezerwithoutadefrostcycle.
StorageBuffer:EpiScriptRTissuppliedina50%glycerolsolutioncontaining50mMTris-HCl(pH7.5),100mMsodiumchloride,1mMDTT,0.1mMEDTA,and0.1%Triton®X-100.
UnitDefinition:OneunitofEpiScriptRTcatalyzestheincorporationof1nmolofdTTPintoacid-insolublematerialin10minutesat37°Cusingsaturatingamountsofoligo(dT)-primedpoly(rA)astemplate.
ContaminatingActivityAssays:EpiScriptRTisfreeofdetectableexonuclease,endonuclease,andRNaseactivities.

Figure1.EpiScript™ReverseTranscriptaseperformedequallyorbetterthancomparablereversetranscriptasesfromothervendors.First-strandsynthesisreactionswereassembledaccordingtomanufacturer´sspecifications.InputRNAwas1µgofJurkattotalRNA(Ambion®).Reactionswereprimedusing50ngofpoly-T(16-18)DNA.2ndstrandqPCRwasperformedusingBio-RadiQSYBRmastermixandgene-specificprimersthatyielded250-350bpamplicons.Reactionswererepeated4-fold.PGDF-R(PlateletDerivedGrowthFactorReceptor),TNF(TumorNecrosisFactor),IL-1b(Interleukin-1beta),IL-2(Interleukin2).ImagecourtesyofMatthewKellinger,Illumina®Inc.
![]() | ![]() | Figure2(clicktoenlarge).EpiScript™ReverseTranscriptaseproducessimiliartranscriptcoverageindependentoftranscriptlength.EpiScriptwasusedtoprimefirststrandcDNAeitherfromtotalRNAusingoligo-dT(leftpanel)orpolyA+selectedRNAwithrandomhexamers(rightpanel).ThecDNAwasconvertedintoIllumina®-compatIBLelibrariesandsequenced.Thereadswerealignedtotranscriptsbaseduponvariouslengthclassesandreaddensityplottedrelativetothepercentdistancefromthe5´endofthetranscripts;0%referstothe5´endand100%isthe3´end.Asexpected,oligo-dTprimingresultsinamorepronounced3´biasthanrandompriming. |
![]() | Figure3.UseofEpiScript®ReverseTranscriptaseforfirststrandcDNAresultsindetectionofsimilartranscriptcategoriesindependentofinputamount.EpiScriptRTwasusedtorandomprime5ngor50pgofhumantotalRNAandthecDNAwasconvertedintolibrariesforIllumina®sequencing.ReadswerealignedusingTophatandannotatedwithCufflinksandthepercentageofeachmajorcategoryisvisualizedasapiechart.Equivalentresultsareobservedforboth5ngand50pgofinputRNA. |
ORDERINFORMATION
Contents:EpiScriptRNaseH-ReverseTranscriptase,10XReactionBuffer,100mMDTT.ebiomall.com
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我在做5RACE,选用TaKaRa公司的RNA反转录酶(RNaseH-),不知道这个酶好不好,有什么需要注意的。
没有序列识别的功能,他就是简单的催化相邻DNA链的5-P末端和3'-OH末端以磷酸二酯键结合的反应,需ATP作辅酶。 不仅可以催化粘性末端之间或平滑末端之间的DNA的连接,也催化DNA与RNA之间以及少数RNA之间的连接。
反转录酶(Reversetranscripatase)是以RNA为模板指导三磷酸脱氧核苷酸合成互补DNA(cDNA)的酶。哺乳类C型病毒的反转录酶和鼠类B型病毒的反转录酶都是一条多肽链。鸟类RNA病毒的反转录酶则由两上亚基结构。真核生物中也都分离出具有不同结构的反转录酶。




