- SpeciesReactivityHuman
- SpecificityDetectshumanTrkAindirectELISAsandWesternblots. IndirectELISAs,approximately50%cross-reactivitywithrecombinantratTrkAisobserved and10%cross-reactivitywithrecombinanthuman(rh) TrkBandrhTrKCisobserved.
- SourcePolyclonalGoatIgG
- PurificationAntigenAffinity-purified
- ImmunogenMousemyelomacelllineNS0-derivedrecombinanthumanTrkA
Ala33-Glu407
Accession#AAA36770 - FormulationLyophilizedfroma0.2μmfilteredsolutioninPBSwithTrehalose.*Smallpacksize(SP)issuppliedasa0.2µmfilteredsolutioninPBS.
- EndotoxinLevel<0.10 eu="" per="" 1="" μg="" of="" the="" antibody="" by="" the="" lal="">0.10>
- LabelUnconjugated
- WesternBlot1µg/mLSeebelow
- FlowCytometry2.5µg/106cellsK562humanchronicmyelogenousleukemiacellline
- Immunohistochemistry5-15µg/mLSeebelow
- CyTOF-readyReadytobelabeledusingestablishedconjugationmethods.NoBSAorothercarrierproteinsthatcouldinterferewithconjugation.
- NeutralizationMeasuredbyitsABIlitytoneutralizebeta‑NGF-inducedproliferationintheTF‑1humanerythroleukemiccellline.Kitamura,T.etal.(1989)J.CellPhysiol.140:323.TheNeutralizationDose(ND50)istypically3-12 µg/mLinthepresenceof5 ng/mLRecombinantHumanbeta‑NGF.
- ReconstitutionReconstituteat0.2mg/mLinsterilePBS.
- ShippingTheproductisshippedatambienttemperature.Uponreceipt,storeitimmediatelyatthetemperaturerecommendedbelow.*Smallpacksize(SP)isshippedwithpolarpacks.Uponreceipt,storeitimmediatelyat-20to-70°C
- Stability&StorageUseamanualdefrostfreezerandavoidrepeatedfreeze-thawcycles.
- 12monthsfromdateofreceipt,-20to-70°Cassupplied.
- 1month,2to8°Cundersterileconditionsafterreconstitution.
- 6months,-20to-70°Cundersterileconditionsafterreconstitution.
- Esposito,D.etal.(2001)J.Biol.Chem.276:32687.
- Sofroniew,M.V.etal.(200)Annu.Rev.Neurosci.24:1217.
- LongName:NeurotrophicTyrosineKinaseReceptorA
- EntrezGeneIDs:4914(Human);59109(Rat)
- AlternateNames:DKFZp781I14186;EC2.7.10;EC2.7.10.1;MTChighaffinitynervegrowthfactorreceptor;Neurotrophictyrosinekinasereceptortype1;neurotrophictyrosinekinase,receptor,type1;NTRK1;NTRK-1;p140-TrkA;TRK1-transformingtyrosinekinaseprotein;TrkA;Trk-A;TRKAOncogeneTRK;TRKTRK1;tyrosinekinasereceptorA
Background:
TrkA,theproductoftheproto-oncogenetrk,isamemberoftheneurotrophictyrosinekinasereceptorfamilythathasthreemembers.TrkA,TrkBandTrkCpreferentiallybindNGF,NT-4andBDNF,andNT-3,respectively.AllTrkfamilyproteinsshareaconservedcomplexsubdomainorganizationconsistingofasignalpeptide,twocysteine-richdomains,aclusterofthreeleucine-richmotifs,andtwoimmunoglobulin-likedomainsintheextracellularregion,aswellasanintracellularregionthatcontainsthetyrosinekinasedomain.TwodistinctTrkAisoformsthatdifferbyvirtueofa6-aminoacidinsertionintheirextracellulardomainhavebeenidentified.ThelongerTrkAisoformistheonlyisoformexpressedwithinneuronaltissueswhereastheshorterTrkAisexpressedmainlyinnon-neuronaltissues.NGFbindstoTrkAwithlowaffinityandactivatesitscytoplasmickinase,initiatingasignalingcascadethatmediatesneuronalsurvivalanddifferentiation.HigheraffinitybindingofNGFrequiresthecoexpressionofTrkAwiththep75NGFreceptor(NGFR),amemberofthetumornecrosisfactorreceptorsuperfamily.NGFRbindsallneurotrophinswithlowaffinityandmodulatesTrkactivityaswellasaltersthespecificityofTrkreceptorsfortheirligands.NGFRcanalsomediatecelldeathwhenexpressedindependentofTrk.
ebiomall.com
>
>
>
>
>
>
>
>
>
>
>
>
ELISA双抗体夹心法(enzyme linked immunosorbent assay——sandwich technique)的原理是将特异性抗体结合到固相载体上形成固相抗体,然后和待检血清中的相应抗原结合形成免疫复合物,洗涤后再加酶标记抗体,与免疫复合物中抗原结合形成酶标抗体-抗原-固相抗体复合物,加底物显色,判断抗原含量。
生物帮有相关介绍。编码RNA http://doc.bio1000.com/show-3399.html
请大家帮帮忙,第一步加完抗原后必须封闭吗
表面抗体是双抗原夹心法
E抗体和核心抗体是竞争抑制法或间接法
在这种测定方法中有3种必要的试剂:①固相的抗原或抗体(免疫吸附剂) ②酶标记的抗原或抗体(标记物)③酶作用的底物(显色剂)
测量时,抗原(抗体)先结合在固相载体上,但仍保留其免疫活性,然后加一种抗体(抗原)与酶结合成的偶联物(标记物),此偶联物仍保留其原免疫活性与酶活性,当偶联物与固相载体上的抗原(抗体)反应结合后,再加上酶的相应底物,即起催化水解或氧化还原反应而呈颜色。
其所生成的颜色深浅与欲测的抗原(抗体)含量成正比。 这种有色产物可用肉眼、光学显微镜、电子显微镜观察,也可以用分光光度计(酶标仪)加以测定。其方法简单,方便迅速,特异性强。向左转|向右转
2.加大辣根过氧化物酶标记的链霉亲和素;
1.标准曲线的标准品是否一定要梯度稀释,为什么?我试过非梯度稀释的,也可以达到线性R2=0.99.
2.我用了CurveExpert做标曲,自动搜索后发现有10种提供的方程,各种形式的,其中一个十分适合我的实验结果(LogisticModel),而其他的感觉又不适合,因为结果常常为负值。这又是为啥捏?
3.实验的酶标仪最大OD值可以测到4,如果我的测量结果在1.3,是否像其他人所说的>1了就不准确了。
4.利用夹心法进行定量分析是否一定要使用线性方程?
不好意思啊,一下问了这么多问题,最近做了一个月的ELISA,完全摸不清头脑啊。谢谢各位了

![]()
暂无品牌分类
