RecombinantHumanIL-4ProteinSummary
| AdditionalInformation | ANewrhIL-4isNowAvailable!Thenewproteinismammaliancellexpressed! |
| DetailsofFunctionality | MeasuredinacellproliferationassayusingTF‑1humanerythroleukemiccells.Kitamura,T.etal.(1989)J.CellPhysiol.140:323.TheED50forthiseffectis0.05-0.2ng/mL.ThespecificactivityofrecombinanthumanIL-4isapproximately2.9x104IU/μg,whichiscalibratedagainsthumanIL-4WHOInternationalStandard(NIBSCcode:88/656). |
| Source | E.coli-derivedhumanIL-4proteinHis25-Ser153,withanN-terminalMet |
| Accession# | P05112 |
| N-terminalSequence | Met |
| Protein/PeptideType | RecombinantProteins |
| Gene | IL4 |
| Purity | >97%,bySDS-PAGEunderreducingconditionsandvisualizedbysilverstain. |
| EndotoxinNote | <0.10 eu="" per="" 1="" μg="" of="" the="" protein="" by="" the="" lal="">0.10> |
Applications/Dilutions
| TheoreticalMW | 15kDa.Disclaimernote:Theobservedmolecularweightoftheproteinmayvaryfromthelistedpredictedmolecularweightduetoposttranslationalmodifications,posttranslationcleavages,relativecharges,andotherexperimentalfactors. | |
| SDS-PAGE | 14kDa,reducingconditions | |
| ReviewedApplications |
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| Publications |
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Packaging,Storage&Formulations
| Storage | Useamanualdefrostfreezerandavoidrepeatedfreeze-thawcycles.
|
| Buffer | Lyophilizedfroma0.2μmfilteredsolutioninPBSwithBSAasacarrierprotein. |
| Purity | >97%,bySDS-PAGEunderreducingconditionsandvisualizedbysilverstain. |
| ReconstitutionInstructions | Reconstituteat100-200μg/mLinsterilePBScontainingatleast0.1%humanorbovineserumalbumin. |
Notes
AlternateNamesforRecombinantHumanIL-4Protein
- Bcellgrowthfactor1
- BCDF
- B-cellstimulatoryfactor1
- BCGF1
- BCGF-1
- binetrakin
- BSF1
- BSF-1
- IL4
- IL-4
- IL-4B_cellstimulatoryfactor1
- interleukin4
- interleukin-4
- Lymphocytestimulatoryfactor1
- MGC79402
- pitrakinra
Background
Interleukin-4(IL-4),alsoknownasBcell-stimulatoryfactor-1,isamonomeric,approximately13kDa‑18kDaTh2cytokinethatshowspleiotropiceffectsduringimmuneresponses(1‑3).Itisaglycosylatedpolypeptidethatcontainsthreeintrachaindisulfidebridgesandadoptsabundledfouralpha-helixstructure(4).HumanIL-4issynthesizedwitha24aasignalsequence.Alternatesplicinggeneratesanisoformwitha16aainternaldeletion.MaturehumanIL-4shares55%,39%and43%aasequenceidentitywithbovine,mouse,andratIL-4,respectively.Human,mouse,andratIL-4arespecies-specificintheiractivities(5‑7).IL-4exertsitseffectsthroughtworeceptorcomplexes(8,9).ThetypeIreceptor,whichisexpressedonhematopoieticcells,isaheterodimeroftheligandbindingIL-4Ralphaandthecommongammachain(asharedsubunitofthereceptorsforIL-2,-7,-9,-15,and‑21).ThetypeIIreceptoronnonhematopoieticcellsconsistsofIL-4RalphaandIL‑13Ralpha1.ThetypeIIreceptoralsotransducesIL-13mediatedsignals.IL-4isprimarilyexpressedbyTh2-biasedCD4+Tcells,mastcells,basophils,andeosinophils(1,2).Itpromotescellproliferation,survival,andimmunoglobulinclassswitchtoIgG4andIgEinhumanBcells,acquisitionoftheTh2phenotypebynaïveCD4+Tcells,primingandchemotaxisofmastcells,eosinophils,andbasophils,andtheproliferationandactivationofepithelialcells(10‑13).IL-4playsadominantroleinthedevelopmentofallergicinflammationandasthma(12,14).
- Benczik,M.andS.L.Gaffen(2004)Immunol.Invest.33:109.
- Chomarat,P.andJ.Banchereau(1998)Int.Rev.Immunol.17:1.
- Yokota,T.etal.(1986)Proc.Natl.Acad.Sci.83:5894.
- Redfield,C.etal.(1991)Biochemistry30:11029.
- Ramirez,F.etal.(1988)J.Immunol.Meth.221:141.
- Leitenberg,D.andT.L.Feldbush(1988)Cell.Immunol.111:451.
- Mosman,T.R.etal.(1987)J.Immunol.138:1813.
- Mueller,T.D.etal.(2002)Biochim.Biophys.Acta1592:237.
- Nelms,K.etal.(1999)Annu.Rev.Immunol.17:701.
- Paludan,S.R.(1998)Scand.J.Immunol.48:459.
- Corthay,A.(2006)Scand.J.Immunol.64:93.
- Ryan,J.J.etal.(2007)Crit.Rev.Immunol.27:15.
- Grone,A.(2002)Vet.Immunol.Immunopathol.88:1.
- Rosenberg,H.F.etal.(2007)J.AllergyClin.Immunol.119:1303.
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磷酸肌酸激酶(CPK),主要存在于骨骼肌和心肌,在脑组织中也存在,是参与体内的能量代谢的一种酶。在临床上主要用于诊断心肌梗塞。心肌梗塞患者发病后2-4小时,血液中此酶活动即开始升高。比血清中谷草转酸酶和乳酸脱氢酶的活力变化都出现得早。
临床意义:
(1)心肌梗塞后,CPK较谷草转氨酶和乳酸脱氢酶特异性高,但持续时间短,2-4天恢复正常。
(2)病毒性心肌炎,CPK也可升高,对诊断及预后有参考价值。
(3)进行性肌营养不良、多发性肌炎以及肌肉损伤时CPK也可升高。
(4)严重的心绞痛、心包炎、房颤、脑血管意外、脑膜炎以及心脏手术等,CPK可见升高。
大家好,有几个设计的药物分子需要测试活性,不知道谁能提供下能做相关测试服务的机构或个人信息不?非常感谢!
protease
水解蛋白质肽键的一类酶的总称。按其水解多肽的方式,可以将其分为内肽酶和外肽酶两类。内肽酶将蛋白质分子内部切断,形成分子量较小的月示和胨。外肽酶从蛋白质分子的游离氨基或羧基的末端逐个将肽键水解,而游离出氨基酸,前者为氨基肽酶后者为羧基肽酶。按其活性中心和最适pH值,又可将蛋白酶分为丝氨酸蛋白酶、巯基蛋白酶、金属蛋白酶和酸性蛋白酶。按其反应的最适pH值,分为酸性蛋白酶、中性蛋白酶和碱性蛋白酶。工业生产上应用的蛋白酶,主要是内肽酶。
蛋白激酶
protein kinase
又称蛋白质磷酸化酶(protein phosphakinase)。一类催化蛋白质磷酸化反应的酶。








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