| Formulation | 20mMHepes,150mMNaCl,pH7.4 |
| Storage | -80°C |
| Purity | >95%bySDS-PAGE |
| ActivityDetermination | FactorXclottingassayorchromogenicassay |
| ShelfLife(properlystored) | 12months |
TheparticipationoftheserineproteasefactorXaintheprothrombinasecomplexisillustrated.MembraneboundfactorXabindstomembraneboundfactorVatoformtheprothrombinasecomplex.Thiscomplexeffectivelyconvertsthezymogenprothrombin(II)totheactiveserineproteasethrombin(IIa)byproteolyticremovalofthefragment1.2(F1.2)portionofprothrombin.
SampleGelInformation:

| Gel | Novex4-12%Bis-Tris |
|---|---|
| Load | HumanFactorXa,1µgperlane |
| Buffer | MOPS |
| Standard | SeeBluePlus2;Myosin(191kDa),PhosphorylaseB(97kDa),BSA(64kDa),GlutamicDehydrogenase(51kDa),AlcoholDehydrogenase(39kDa),CarbonicAnhydrase(28kDa),MyoglobinRed(19kDa),Lysozyme(14kDa) |
| SpecialNotes | Heavychainisadoubletduetothepresenceofupto50%betaform.Theconversionofalpha-Xatobeta-Xaoccursbyautocleavageofalpha-Xabyalpha-XaresultinginthelossofaCOOH-terminalpeptide. |
Overview:
Activationofthezymogen,factorX,byeithertheintrinsicorextrinsicfactorXasecomplexesproducestheactiveserineproteasefactorXa(1,2).TheactivationoffactorXrequiresproteolyticcleavageoftheheavychain,resultinginthereleaseofanactivationglycopeptide.TheheavychainregioninfactorXacontainstheserineproteasecatalyticdomain,whilethelightchain,asinthezymogen,containsthemembranebindingdomain.
FactorXaparticipatesintheprothrombinasecomplex,whichcatalyzestherapidconversionofprothrombintothrombin.ProthrombinaseisanenzymecomplexcomposedoffactorXa(enzyme)andfactorVa(cofactor)assembledonacellularsurfaceinthepresenceofcalciumions.AlthoughfactorXacanindependentlycatalyzetheactivationofprothrombin,therateatwhichthisreactionoccursisincreasednearly300,000-foldwithcompleteassemblyoftheprothrombinasecomplex.TheclottingactivityoffactorXainvivoisterminatedbyeitherinactivationofthecofactor,factorVa,orbydirectinhibitionoffactorXabyinhibitors,suchasATIII,afterdisassemblyoftheprothrombinasecomplex.
Inrecentyears,molecularBIOLOGistshaveutilizedfactorXaforsitespecificcleavageoffusionproteinsexpressedinbacteria(9-12).AfactorXa-sensitivesiteisincorporatedbetweentherecombinantproteinofinterestandpeptidesorproteinswhichfacilitatepurificationand/orexpression.ThetargetproteinisreleasedfromtheexpressedhybridbycleavagewithfactorXa.ThefactorXacanthenbeeasilyremovedbyaffinitychromatography.
FactorXaispreparedbyactivatingpurifiedfactorXwiththefactorXactivatorisolatedfromRussell"svipervenom.FactorXaispurifiedfromtheactivationmixturebychromatographyoverbenzamidine-Sepharosefollowedbygelfiltration(1,3).SeveralmodifiedformsoffactorXaarealsoavailableincluding:A)active-siteblockedfactorXacontainingeitherthetripeptidechloromethylketoneinhibitorEGRck,orthefluorescentinhibitorDansyl-EGRck;andB)humanGla-domainlessβ-factorXa.Theenzymeissuppliedin50%(vol/vol)glycerol/H2Oandshouldbestoredat-20°C.PurityisdeterminedbySDS-PAGEanalysisandactivityismeasuredinafactorXaclottingassayand/orchromogenicsubstrateassay.
InadditiontoitsbroadapplicationincoagulationresearchfactorXacanbeusedforsitespecificcleavageoffusionproteins.AfactorXasensitivesiteisincorporatedbetweentherecombinantproteinofinterestandpeptidesorproteinswhichfacilitatepurificationand/orexpression.ThetargetproteinisreleasedfromtheexpressedhybridbycleavagewithfactorXa.FactorXacanthenbeeasilyremovedbyaffinitychromatography.LottolotconsistencyensuresreproducIBLeresultseverytime.Forexperimentsinvolvingcellcultures,pleasecontactustodiscusscustom,lowendotoxinlotsdesignatedforcellcultureuse.
Properties:
| Localization | Plasma | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Modeofaction | Enzymecomponentoftheprothrombinasecomplex | ||||||||
| Molecularweight | 46,000(human)(4) 45,300(bovine)(5) | ||||||||
| Extinctioncoefficient |
| ||||||||
| SpecificActivity | approximately1000units/mg | ||||||||
| Structure | twosubunits,Mr=16,200and29,000(human)(6),Mr=16,500and28,800(bovine)(5),NH2-terminalgladomain,twoEGFdomains | ||||||||
| Percentcarbohydrate | 3.0%(human)(8) 2.1%(bovine)(8) | ||||||||
| Post-translationalmodifications | elevenglaresidues, oneβ-hydroxyaspartate |
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IgM是免疫球蛋白M(Immunoglobulin M,IgM)的缩写。根据结构的不同将免疫球蛋白分为五种,IgM是人的免疫球蛋白之一,其他还有lgA、lgG、IgD和lgE。
HSV1型导致的一般都是腰部以上的感染,典型症状是水泡有可能引起脑炎,而且有非活化状态的潜伏。所以我觉得你根本就不用担心这个抗体IgG阳性的化验单。
您好,对于优生学检查,有两种抗体,一种是IGG抗体,一种是IGM抗体,如果是前者阳性,只能说明即往以前有感染了这类病原体,而不能说明当前正在感染这个病毒的。
指导意见:
如果是后一种阳性,也就是说IGM抗体阳性时,就提示当前正在感染这个病毒的,需要及时行抗病毒的药物治疗为佳,治好后才行怀孕的,否则对于怀孕的胎儿有很大的影响的。
aware可自测不用抽血祝您健康天 猫!
2-IgM也是一种特异性感染指标,但在人体内持续时间不长(有时是30天更短),往往是传染病的近期感染指标。呈阴性是指:你近期没有感染过结核杆菌。
本试验根据《中国药典》2015年版紫外分光光度法吸收系数法进行制定,本试验方法采用的方法学验证内容如下:
1.线性及范围
取IgG标准品配制5个不同浓度被测样品,并进行测定,绘制标准曲线,得到回归方程及范围。
2.准确度
已回收率对准确度进行验证。以已知含量的IgG标准品配制供试品,配制三个浓度,每个浓度平均测定三次。计算回收率。
3.精密度
IgG标准品配制供试品,平行测定六次。
4.溶液稳定性试验
至少持续2h的溶液稳定性考察。
5.干扰试验
空白溶液中加入辅料,在280nm处测定吸收,确定辅料是否对样品的吸收造成干扰。
以上,请大神指正。
补充问题,在专属性验证上,仅做辅料干扰是不是太少了?是否再进行强降解实验呢?因为其中包含了蛋白质A、外源性DNA及宿主细胞蛋白残留。我是否应该针对这三种杂质进行专属性试验?该如何进行呢?

