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Optimization of LC-MS peptide mapping
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Optimization of LC-MS peptide mapping
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Optimization of LC-MS peptide mapping
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大豆多肽(peptide)酶聯(lián)免疫分析試劑盒使用說明書
大豆多肽(peptide)酶聯(lián)免疫分析試劑盒使用說明書本試劑盒僅供研究使用。檢測范圍:96T2ng/L-90ng/L使用目的:本試劑盒用于測定發(fā)酵豆粕樣本中大豆多肽(peptide)含量。實驗原理本試劑盒應用雙抗體夾心法測定標本中大豆多肽(peptide)水平。用純化的大豆多肽(peptide)抗體包被微孔板,制成固相抗體,往包被單抗的微孔中依次加入大豆多肽(peptide),再與HRP標記的大豆多肽(peptide)抗體結合,形成抗體-抗原-酶標抗體復合物,經(jīng)過徹底洗滌后加底物TMB顯色。TMB在HRP酶的催化下轉化成藍色,并在酸的作用下轉化成Z終的黃色。顏色的深淺和樣品中的大豆多肽(peptide)呈正相關。用酶標儀在450nm波長下測定吸光度(OD值),通過標準曲線計算樣品中大豆多肽(peptide)濃度。大豆多肽(peptide)酶聯(lián)免疫分析試劑盒組成標本要求1.標本采集后盡早進行提取,提取按相關文獻進行,提取后應盡快進行實驗。若不能馬上進行試驗,可將標本放于-20℃保存,但應避免反復凍融2.不能檢測含NaN3的樣品,因NaN3YZ辣根過氧化物酶的(HRP)活性。大豆多肽(peptide)酶聯(lián)免疫分析試劑盒操作步驟1.標準品的稀釋:本試劑盒提供原倍標準品一支,用戶可按照下列圖表在小試管中進行稀釋。2.加樣:分別設空白孔(空白對照孔不加樣品及酶標試劑,其余各步操作相同)、標準孔、待測樣品孔。在酶標包被板上標準品準確加樣50μl,待測樣品孔中先加樣品稀釋液40μl,然后再加待測樣品10μl(樣品Z終稀釋度為5倍)。加樣將樣品加于酶標板孔底部,盡量不觸及孔壁,輕輕晃動混勻。3.溫育:用封板膜封板后置37℃溫育30分鐘。4.配液:將30倍濃縮洗滌液用蒸餾水30倍稀釋后備用5.洗滌:小心揭掉封板膜,棄去液體,甩干,每孔加滿洗滌液,靜置30秒后棄去,如此重復5次,拍干。6.加酶:每孔加入酶標試劑50μl,空白孔除外。7.溫育:操作同3。8.洗滌:操作同5。9.顯色:每孔先加入顯色劑A50μl,再加入顯色劑B50μl,輕輕震蕩混勻,37℃避光顯色15分鐘.10.終止:每孔加終止液50μl,終止反應(此時藍色立轉黃色)。11.測定:以空白空調(diào)零,450nm波長依序測量各孔的吸光度(OD值)。測定應在加終止液后15分鐘以內(nèi)進行。大豆多肽(peptide)酶聯(lián)免疫分析試劑盒操作程序總結:計算以標準物的濃度為橫坐標,OD值為縱坐標,在坐標紙上繪出標準曲線,根據(jù)樣品的OD值由標準曲線查出相應的濃度;再乘以稀釋倍數(shù);或用標準物的濃度與OD值計算出標準曲線的直線回歸方程式,將樣品的OD值代入方程式,計算出樣品濃度,再乘以稀釋倍數(shù),即為樣品的實際濃度。注意事項1.試劑盒從冷藏環(huán)境中取出應在室溫平衡15-30分鐘后方可使用,酶標包被板開封后如未用完,板條應裝入密封袋中保存。2.濃洗滌液可能會有結晶析出,稀釋時可在水浴中加溫助溶,洗滌時不影響結果。3.各步加樣均應使用加樣器,并經(jīng)常校對其準確性,以避免試驗誤差。一次加樣時間**控制在5分鐘內(nèi),如標本數(shù)量多,推薦使用排槍加樣。4.請每次測定的同時做標準曲線,**做復孔。如標本中待測物質(zhì)含量過高(樣本OD值大于標準品孔**孔的OD值),請先用樣品稀釋液稀釋一定倍數(shù)(n倍)后再測定,計算時請Z后乘以總稀釋倍數(shù)(×n×5)。5.封板膜只限一次性使用,以避免交叉污染。6.底物請避光保存。7.嚴格按照說明書的操作進行,試驗結果判定必須以酶標儀讀數(shù)為準.8.所有樣品,洗滌液和各種廢棄物都應按傳染物處理。9.本試劑不同批號組分不得混用。10.如與英文說明書有異,以英文說明書為準。保存條件及有效期1.試劑盒保存:2-8℃。2.有效期:6個月[詳細]
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半乳糖凝集素9蛋白galectin 9 peptide說明書
DESCRIPTIONSourceE.coliderivedAla2Thr323Accession#BAA31542NterminalSequenceAnalysisAla2Structure/FormMonomerPredictedMolecularMass35.8kDaSPECIFICATIONSSDSPAGE34kDa,reducingconditionsActivityMeasuredbyitsabilitytoinduceapoptosisofJurkathumanacuteTcellleukemiacells.Lu,L.H.etal.(2007)J.Biochem.141:157.Theforthiseffectistypically15ug/mL.Measuredbyitsabilitytoagglutinatehumanredbloodcells.Hadari,Y.R.etal.(2000)J.CellSci.113:2385.Theforthiseffectistypically2.5-12.5μg/mL.EndotoxinLevel<1.0EUper1μgoftheproteinbytheLALmethod.Purity>95%,bySDSPAGEunderreducingconditionsandvisualizedbysilverstain.FormulationLyophilizedfroma0.2μmfilteredsolutioninMOPS,NaCl,EDTA,DTTandTrehalose.SeeCertificateofAnalysisfordetails.PREPARATIONANDSTORAGEReconstitutionReconstituteat100μg/mLinwater.ShippingTheproductisshippedatambienttemperature.Uponreceipt,storeitimmediatelyatthetemperaturerecommendedbelow.Stability&StorageUseamanualdefrostfreezerandavoidrepeatedfreezethawcycles.l12monthsfromdateofreceipt,20to70°Cassupplied.l1month,2to8°Cundersterileconditionsafterreconstitution.l3months,20to70°Cundersterileconditionsafterreconstitution.BACKGROUNDGalectinscompriseafamilyofmultifunctionalcarbohydratebindingproteinswithspecificityforN-acetyllactosaminecontainingglycoproteins.Atleast14mammalianGalectinssharestructuralsimilaritiesintheircarbohydraterecognitiondomains(CRD),formingthreegroups:prototype(oneCRD),tandemrepeat(twoCRDs),andchimeric(oneCRD,uniqueN-terminus)(1,2).FulllengthGalectin9isawidelyexpressed39kDatandemrepeatGalectinthatcontainstwoCRDsconnectedbyalinkerregion(3).Progressivedeletionwithinthelinkerregiongeneratesa36kDaisoform,alsoknownasEcalectinorUAT,aswellasa35kDaisoform(4).ThisrecombinantproteincorrespondstotheEcalectinisoformofhumanGalectin9andshares70%and73%aasequenceidentitywiththecorrespondingregionsofmouseandratGalectin9,respectively.Galectin9exhibitsawiderangeofactivities.Allthreeisoformsfunctionaseosinophilchemoattractants(5,6).Thisactivityisdestroyedbythrombinmediatedcleavagewithinthelinkerregionofthelongisoform,althoughtheEcalectinisoformisresistanttothrombin(7).Galectin9bindstocarbohydratemoietiesofIgE,therebypreventingimmunecomplexformation,mastcelldegranulation,andasthmaticandcutaneousanaphylaxisreactions(8).Independentofitslectinproperties,Galectin9inducesthematurationofdendriticcellswhichpromoteTh1polarization(9).Galectin9inducescellularapoptosisinpartbydirectbindingtoTIM3(10,11).ItsinteractionwithTIM3inhibitsTh1cellandCD8+cytotoxicTcellresponsesandalsopromotesregulatoryTcelldifferentiationandactivity(11,12).Galectin9suppressestumorcellmetastasisbyinterferingwiththeassociationsbetweenhyaluronicacidandCD44andbetweenVCAM1andIntegrinα4β1(13).TheEcalectinisoform(UATuratetransporter)canalsobeexpressedasanintegralmembraneproteinandmediatethecellulareffluxofurate(14).References:1.Yang,RY.etal.(2008)ExpertRev.Mol.Med.10:e17.2.Elola,M.T.etal.(2007)Cell.Mol.LifeSci.64:1679.3.Tureci,O.etal.(1997)J.Biol.Chem.272:6416.4.Chabot,S.etal.(2002)Glycobiology12:111.5.Matsumoto,R.etal.(2002)J.Immunol.168:1961.6.Sato,M.etal.(2002)Glycobiology12:191.7.Nishi,N.etal.(2006)Glycobiology16:15C.8.Niki,T.etal.(2009)J.Biol.Chem.284:32344.9.Dai,S.Y.etal.(2005)J.Immunol.175:2974.10.Seki,M.etal.(2007)ArthritisRheum.56:3968.11.Zhu,C.etal.(2005)Nat.Immunol.6:1245.12.Sehrawat,S.etal.(2010)PloSPathogens6:e1000882.13.Nobumoto,A.etal.(2008)Glycobiology18:735.14.LealPinto,E.etal.(2002)Am.J.Physiol.RenalPhysiol.283:F150.[詳細]
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