
Overview:
ProductName | CreatinineSerumDetectionKit |
Description | Colorimetricmeasurementofcreatinine |
SpeciesReactivity | Human,Mouse,Rat,Rabbit,Sheep |
Platform | Microplate |
SampleTypes | Plasma,Serum |
DetectionMethod | ColorimetricAssay |
AssayType | DirectQuantitativeAssay |
Utility | Colorimetricassayusedtomeasurecreatinineinsamples. |
Sensitivity | 0.081mg/dl |
AssayRange | 0.5-4mg/dl |
Precision | IntraAssayPrecision:Threehumanserumsampleswereruninreplicatesof20inanassay.Themeanandprecisionofthecalculatedcreatinineconcentrationswere:Sample1-0.99mg/dL,7.9%CVSample2-1.50mg/dL,6.3%CVSample3-3.82mg/dL,4.5%CVInterAssayPrecision:Threehumanserumsampleswereruninduplicatesin19assaysrunovertwoyearsbyfouroperators.Themeanandprecisionofthecalculatedcreatinineconcentrationswere:Sample1-0.91mg/dL,9.6%CVSample2-1.26mg/dL,7.3%CVSample3-3.51mg/dL,8.0%CV |
NumberofSamples | 91samplesinduplicate |
OtherResources | KitBooklet,MSDS |
Properties
StorageTemperature | 4ºC | |||||||||||||||
ShippingTemperature | BlueIce | |||||||||||||||
ProductType | DetectionKits | |||||||||||||||
AssayOverview | TheCreatinineSerumDetectionKitisdesignedtoquantitativelymeasurecreatininepresentinserumsamples.Acreatininestandard,calibratedtoaNISTcreatininestandard,isprovidedtogenerateastandardcurvefortheassayandallsamplesshouldbereadoffthestandardcurve.StandardsorsamplesarePipettedintoaclearmicrotiterplate.Anassaydiluentisaddedtoallstandards,controlsandsamples.ThecolorgeneratingreactionisinitiatedwiththeStressXpress®CreatinineReagent,whichispipettedintoeachwell.Theassayutilizesakineticabsorbancemethodtoovercomeinterferencebycoloredcompoundsinserum.Theabsorbanceofthecoloredproductisreadafter1minuteinamicrotiterplatereadercapableofmeasuring490nmwavelength.At30minutestheopticaldensityisreadagain.TheconcentrationofcreatinineiscalculatedusingthedeltaoftheopticaldensityreADIngsat30and1minutecomparedtothecurvegeneratedfromthestandards,orbyusingtheExcelworksheetavailableforfreedownloadatourwebsite.TheJaffereactionusedinthiskithasbeenmodifiedtoreadcreatininelevelsinserum,8. | |||||||||||||||
KitOverview |
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CiteThisProduct | CreatinineSerumDetectionKit(StressMarqBiosciencesInc.,VictoriaBCCANADA,Catalog#SKT-217) |
BIOLOGicalDescription
AlternativeNames | N-Carbamimidoyl-N-methylglycineDetectionKit,MethylguanidoaceticacidDetectionKit |
ResearchAreas | CardiovascularSystem,CellSignaling |
ScientificBackground | Creatinine(2-amino-1-methyl-5H-imadazol-4-one)isametaboliteofphosphocreatine(p-creatine),amoleculeusedasastoreforhigh-energyphosphatethatcanbeutilizedbytissuesfortheproductionofATP(1).Creatineeithercomesfromthedietorsynthesizedfromtheaminoacidsarginine,glycine,andmethionine.Thisoccursinthekidneysandliver,althoughotherorgansystemsmaybeinvolvedandspecies-specificdifferencesmayexist(2).Creatineandp-creatineareconvertednon-enzymaticallytothemetabolitecreatinine,whichdiffusesintothebloodandisexcretedbythekidneys.Invivo,thisconversionappearstobeirreversIBLeandinvitroitisfavoredbyhighertemperaturesandlowerpH2.Creatinineformsspontaneouslyfromp-creatine(3).Undernormalconditions,itsformationoccursataratethatisrelativelyconstantandasintra-individualvariationis<15% from day to day, creatinine is a useful tool for normalizing the levels of other molecules found in urine. Additionally altered creatinine levels may be associated with other conditions that result in decreased renal blood flow such as diabetes and cardiovascular disease (4-6). |
References | 1.Wallimann,T.etal.,Biochem.J.,2000,281,21-40. 2.Wyss,M.andKaddurah-Daouk,R.,Physiol.Rev.,2000,80,1107-1213. 3.RajaIyengar,M.etal.,J.Biol.Chem,1985,260,7562-7567. 4.Manjunath,G.etal.,Postgrad.Med.2001,110,55-62. 5.Gross,J.L.etal.,DiabetesCare,2005,28,164-176. 6.Anavekar,N.S.etal.,NewEngl.J.Med.,2004,351,1285-1295. |
ProductImages

TypicalStandardCurveforCreatinineSerumDetectionKitStressXpress®–SKT-217.AssayType:DirectEnzyme.DetectionMethod:ColorimetricAssay.AssayRange:0.5–4mg/dl.

Linearitywasdeterminedbytakingtwohumanserumsamples,onewithalowdilutedcreatininelevelof0.75mg/dLandonewithahigherlevelof3.78mg/dLandmixingthemingivenratios.Themeasuredconcentrationswerecomparedtotheexpectedvalues.

Creatineandp-creatineareconvertednon-enzymaticallytothemetabolitecreatinine,whichdiffusesintothebloodandisexcretedbythekidneys.Invivo,thisconversionappearstobeirreversibleandinvitroitisfavoredbyhighertemperaturesandlowerpH2.Creatinineformsspontaneouslyfromp-creatine.
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此外,我们常常用“电泳法”判断液体的性质,是胶体还是溶液。在高中化学中我们就用过这种方法判断给定的液体是否为胶体。向左转|向右转
2.配好的EDTA不灭菌行不?放4度冰箱等过完年回来直接拿去配TAE
3.TAE配好后不用灭菌吧
低离子强度时,迁移率快。但离子强度过低,缓冲液的缓冲容量小,不易维持pH恒定。高离子强度时迁移率慢,因此为了获得更快的反应速度,在缓冲容量允许的范围内,离子强度应该尽可能小。
此外,我们常常用“电泳法”判断液体的性质,是胶体还是溶液。在高中化学中我们就用过这种方法判断给定的液体是否为胶体。MOPS电泳缓冲液、胚胎干细胞培养生长因子、动物肝细胞分离培养试剂盒、结晶紫细胞群落染色试剂盒、MFN-2蛋白表达检测试剂盒、血红细胞溶解液、磷酸缓冲盐溶液、Hanks平衡盐粉剂、胰蛋白酶溶液、
② 应取pH8.0,这样可使核苷酸带较多负电荷,利于吸附于阴离子交换树脂柱。虽然pH 11.4时核苷酸带有更多的负电荷,但pH过高对分离不利。
③ 当不考虑树脂的非极性吸附时,根据核苷酸负电荷的多少来决定洗脱速度,则洗脱顺序为CMP>AMP> GMP > UMP,但实际上核苷酸和聚苯乙烯阴离子交换树脂之间存在着非极性吸附,嘌呤碱基的非极性吸附是嘧啶碱基的3倍。静电吸附与非极性吸附共同作用的结果使洗脱顺序为:CMP> AMP > UMP >GMP。

