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《牛奶β-酪蛋白和大豆β-伴球蛋白雙抗制備及夾心ELISA快速定性檢測技術(shù)的建立-論文.pdf》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、浙江大學(xué)學(xué)報(bào)(農(nóng)業(yè)與生命科學(xué)版)39(2):222~226,2013JournalofZhejiangUniversity(Agric.&LifeSci.)http://www.journals.zju.edu.cn/agrE-mail:zdxbnsb@zju.edu.cnDOI:10.3785/j.issn.1008—9209.2012.11.617牛奶酪蛋白和大豆伴球蛋白雙抗制備及夾心ELISA快速定性檢測技術(shù)的建立肖海龍,趙凱,林賽君,王紅青,潘建紅(杭州市質(zhì)量技術(shù)監(jiān)督檢測院,杭州310019)摘要采用牛奶酪蛋
2、白和大豆伴球蛋白分別免疫BALB/c小鼠,4次免疫后,通過脾臟細(xì)胞雜交瘤技術(shù)及間接酶聯(lián)免疫吸附測定(enzyme-linkedimmunosorbentassay,ELlSA)篩選制備單克隆抗體,同時分別制備兔抗酪蛋白和伴球蛋白多克隆抗體;通過棋盤滴定法,初步確定單克隆抗體和多克隆抗體的最佳工作濃度,建立雙抗夾心ELlSA用于乳品摻假以及牛奶、大豆過敏原成分的快速定性檢測.結(jié)果表明:通過免疫和雜交瘤技術(shù)分別獲得了抗酪蛋白和p一伴球蛋白的單克隆抗體,純化后2種抗體的效價均達(dá)到1:1×10,通過免疫兔制備的2種多克隆抗體
3、經(jīng)純化后效價在1:2×1O左右;所建立的雙抗夾心ELISA方法的最低檢測限為15ng/mL,與其他物種的蛋白不發(fā)生交叉反應(yīng),具有良好的特異性.這為建立乳品摻假及過敏原成分快速檢測奠定了基礎(chǔ).關(guān)鍵詞酪蛋白;3-伴球蛋白;單克隆抗體;酶聯(lián)免疫吸附測定中圖分類號TS252文獻(xiàn)標(biāo)志碼APreparationofdouble-antibodyandestablishmentofsandwichELISAagainstmilkcaseinandsoybean~conglycinin.JournalofZhejiangUniver
4、sity(Agric.&LifeSci.),2013,39(2):222—226XIAOHailong,ZHAOKai,LINSaijun,WANGHongqing,PANJianhong(HangzhouInstituteofCalibrationandTestingforQualityandTechnicalSupervision,Hangzhou310019,China)SummaryProteinadulterationandallergensarethetWOmajorfoodsafetyissues,an
5、dcanposehealththreatstoconsumers.Oneoftheeffectiveprecautionsisextensivetest,whichneedssimple,rapidandlow—costtestmethod.Presentmethodsincludingsodiumdodecylsulfatepolyacrylamidegelelectrophoresis(SDS-PAGE),highperformanceliquidchromatography(HPLC)andliquidchro
6、matography-massspectrometry(LC—MS)/MSarenotacceptableforconsumersduetoexpensiveinstruments.ImmunologicaltechniqueisarapidmethodforscreeningandiSsuitableforconsumerstouse.caseinandconglycininarenotonlythemajorproteinsofmilkandsoybean,butalsoimportantfoodborneall
7、ergens.Inthisstudy,themonoclonalantibodiesandpolyclonalantibodiesagainst3-caseinand13-conglycininwerepreparedandtheenzyme—linkedimmunosorbentassay(ELISA)kitswereestablishedfordetectingadulterationandallergens.BALB/cmicewereimmunizedfourtimeswithpurifiedantigens
8、addingadjuvantornotuntiltheserumtiterachieved1;1×10.a(chǎn)ndthemicespleencellsandmyelomacellsSP2/Owerefusedastheroutinecell~fusiontechnology.Positivecellswerescreenedfor3-4timesw