- 1、本文档共9页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
沉淀蛋白质的常用方法〈TCA、乙醇、丙酮沉淀蛋白操作步骤)
TCA-DOC
ForprecipiationofvemomProteaconcentratiom
1)Toeonevolumeofproteinsolution,add17100vol.of2旬DOC(Nadeoxycholate,
detergent).
2)Vortexandletsitfor30minat4oC-
3)Add1/10ofTrichloroaceticacid(TCA)100%vortexandletsitONat4oC
《preparationof100%TCA:454mlH2OAkgTCA.Maintainindarkbottleat4oC.Be
careful,usegloves10.
4)Spin15min4oCinmicrofugeatmaximumspeed(15000g).Carefullydischarge
supernatantandretainthepellet:drytubebyinversionontissuepaper(pelletmaybe
difficulttoseej.OPTION:WasPelettwiceWionevonieofcoidacetone
(facefonekeepaf-200C)VorrexendrepeilersamtpfesSi71speedpephpee
TWOG5Pes了
5)Drysamplesundervaccum(speedvac)ordryairForSDS,resuspend
samplesinaminimalvolumeofsamplebuffer,(ThepresenceofsomeTCAcangive
ayellowcolourasaconsequenceoftheacidificationofthesamplebuffer;titrate
withINNaOHor1IMTrisHCIPH8.5toobtainthenormalbluesamplebuffercolour.)
NormalTCA
7pelipaipale7CAsofipieiniererencesGadproleincoHCeFHra1EOR
DToasampleofproteinsolutionaddTrichloroaceticacid(TCA)1009%toget13%
finalconcentration.Mixandkeep5min-20oCandthen15min4oC;orlongertimeat
4oCwithonutthe-20oCsteptorlowerproteinconcentration.Suggestion:leaveON这
theproteinconcentrationisvery]ow.
(Preparationof100%TCA:454mlH2OAkgTCA.Maintainindarkbottleat4oC.Be
careful,usegloves10.
2)]Spin1Smin4oCinmicrofugeatmaximumspeed(15000g).Carefullydischarge
supernatantandretainthepellet:drytubebyinyersionontissuePaper(Pelletmaybe
difficulttoscc).
3)ForSDS,resuspendsamplesinaminimalvolumeofsamplebuffer.(The
PresenceofsomeTCAcangiveayellowcolourasaconsequenceoftheacidification
ofthesamplebuffer;titratewith1NNaOHor1MTrisHCIpH8.stoobtainthe
normalbluesamplebuffercolour.
文档评论(0)