ProductDescription
T7RNAPolymerasecatalysesthesynthesisofRNAinthepresenceofdouble-strandedDNAcontainingaT7promotersequence.ItisisolatedfromanE.colitransformedbyaplasmidcontainingtheT7RNAPolymerasegene.Thisenzymeisprovidedinglycerol-basedstoragebuffercontaining:20mMpotassiumphosphatepH7.5,100mMNaCl,1.0mMEDTA,10mMDTT,0.2%TritonX-100and50%glycerol.Alternatively,itisalsoprovidedinthesamebuffercontaining1.0Mtrehaloseinsteadofglycerol(suitableforlyophilization).Concentration70,000units/mL.
Pleaseinquireforcustomconcentrationsandbulkquantities.
Applications:
PreparationoffluorescentorrADIoactivelylabeledRNAprobes
PreparationoflargeRNAtranscriptsforanalysisorinvitrotranslation
AmplificationofRNA(inconjunctionwithAMVRTandRibonucleaseH.)
Preparationofanti-senseRNA
Preparationofribozymes
PreparationofmRNAprecursorforsplicing
PreparationofdsRNAforRNAinterferenceorsilencing
PreparationofsubstrateinRNaseprotectionassays
PreparationoftemplateforgenomicDNAsequencing
PreparationofRNAforstudiesofRNAsecondarystructureandRNA-proteininteractions
Reagentssupplied:
5XReactionBufferforT7RNAPolymerase
1XReactionBufferConditions:
40mMTrisHCl,pH7.7
6mMMgCl2
10mMDTT
2mMSpermidine
Tobesupplementedwith:
0.5mMATP,CTP,GTPandUTP
DNAtemplatewithT7promoter
(20nMofalinearizedplasmidDNAor40ug/mLofa3Kbplasmid)
Incubateat37ºC
UnitDefinition:
Oneunitisdefinedastheamountofenzymethatwillincorporate3nmolofUridinetriphosphateintoacid-insolubleforminonehourat37ºCunderstandardassayconditions:40mMTrisHCl,pH7.5,30mMMgCl2,20mMDTT,0.4mMGTP,CTP,ATP,UTPand[3H]-UTP,20µg/mLnon-linearizedplasmidDNA,50µg/mLBSA.
GeneralNotes:
DithiothreitolisrequiredforT7RNAPolymeraseactivity.ThislABIlecomponentofthereactionbuffermayberestoredbysupplementingreactionswithafinalconcentrationof10mMDTT.
HigheryieldsofRNAmaybeobtainedbyincreasingtheconcentrationofNTP’stoasmuchas4mM.
Caremustbetakenthatthetotalsaltconcentrationinthereactiondoesnotexceed50mM,sincethisenzymeissensitivetosaltconcentrationsexceedingthisamount.
QualityControlofT7RNAPolymerase
1.)DNaseActivity:One-halfµgofHaefragmentsofPhiX-174DNAisincubatedat37ºCwith175unitsofT7RNAPolymerasefor3hours,andthenelectrophoresedinanativeagarosegelsimultaneouslywithcontrolpositiveDNase1reactions.Nomorethantheequivalentof1.25X10E-4unitofDNase1isdetected.
2.)RibonucleaseActivity:OnemicrogramofanRNALadderisincubatedfor2hourswith280unitsofT7RNAPolymerase,andthenelectrophoresedinanativeagarosegelsimultaneouslywithcontrolpositiveRNase1Areactions.Nomorethantheequivalentof8.0X10E-8unitofRNase1Aisdetected.
3.)SpecificActivity:ThespecificactivityoftheT7RNAPolymeraseisnolessthan400,000unitspermg.
References:
Sambrook,J.,Fritsch,E.F.,andManiatis,T.(1989)MolecularCloning:ALaboratoryManual,(2ndEd.),10.27-10.37
Sambrook,J.,Fritsch,E.F.,andManiatis,T.(1989)MolecularCloning:ALaboratoryManual,(2ndEd.),18.82-18.84
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最近遇到了实验上的大问题,就是用一步法做RNA的荧光定量PCR时,发现低浓度的做不出来,而DNA是可以的,想请问各位在一步法PCR中有没有什么高见,就是逆转录的Buffer有没有什么需要注意的地方!就是在逆转录酶的最适Buffer和Taq酶的最适Buffer中寻找一个最适的Buffer!
ResponseofskeletalmuscleRNApolymerasesIandIItotumourgrowth
BiochimicaetBiophysicaActa(BBA)-GeneStructureandExpression,Volume950,Issue3,7September1988,Pages296-302
GeorgeA.J.Goodlad,CatherineM.Clark
或者有高手知道怎么测也行
请规范发贴,求助贴请在标题前加【求助】,谢谢您的合作。——by草根
我是新手。我要开始做实验了,但一开始就碰到了个很大的问题。
我想买个能利用哺乳动物细胞RNA聚合酶将DNA转录成RNA的的质粒,向好几家公司打了电话,但都没有我想要的东西。
没有这个东西,我的实验就只能是蓝图了。哪位战友有办法的,能不能帮帮我?
不胜感激。
B、酶细胞产能细胞内(外)起作用消化酶细胞外起作用B错误;
C、酶同需要适条件同胃蛋白酶与胰蛋白酶所需PH同C错误;
D、葡萄糖细胞质基质解丙酮酸需要酶催化D确.
故选:D.
暂无品牌问答