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ID:5467168
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页数:14页
时间:2017-12-13
《用纸层析法鉴定转氨酶的转氨基作用课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、IdentificationofthetransaminationbypaperchromatographyExp.9用纸层析法鉴定转氨酶的转氨基作用Purpose(目的)1.Tomastertheprincipleoftransamination掌握转氨基作用原理2.Identifythetransaminationbypaperchromatography用纸层析法鉴定转氨酶的转氨基作用Principle(原理)1、transaminationR2CCOOHNH2H1RCCOOHOR2CCOOHOR1CCOOHNH2Haminoacidα-ketoacidamino
2、acidα-ketoacidaminopherasetwoimportantaminopherasesGPT(acutehepatitis)GOT(myocardialinfarction)(两种重要的转氨酶)Reaction-thisexperimentCOOHCH2CH2COCOOH+CH3CH-NH2COOHGPTCOOHCH2CH2CH-NH2COOH+CH3COCOOH2、thepaperchromatography(纸层析)Ala,low-poleGlu,high-poleThestationaryphase:Fibrincombinewaterphenol
3、,low-poleTheflowingphase:(固定相)(流动相)XsYmTheforelandofsolventThecenterofthespeckleThecenterα↑Rf↓;α↓,Rf↑coefficientofdistributionα=Cs/CmCs:固定相中的浓度Cm:流动相中的浓度(分配系数:α)Rf=Xs/YmXs:溶质移动的距离Ym:溶剂移动的距离transportratio(迁移率)TheinfluencingfactoronRf:ThestructureandcharacteroftheAATheSolventsystemTemperat
4、ureThequalityofthefilterpaper(影响因素)3、Color:(显色)OHOHOO2水合茚三酮+H2N-CH-COOHRONH4ONOO+RCHO+CO2罗曼氏紫Operation(操作)1、Theenzymaticreaction(酶促反应)12100℃,5minsadd0.5mlAla0.5mla–ketoglutarate1.5mlbufferMixup37℃,1hr1100℃10mincool23000rpm5minssupernatant肝匀浆(两种:已备好)(上清液)2、Chromatogram(层析)①Don’ttouchthefi
5、lterpaperbyhand②Markwithpencil,holewithtoothpick③Spottingthesample(点样)④Chromatogram(层析)⑤Drying(烘干)⑥Color(显色)4(Glu)2(Ala)1(A)3(c)Results(结果)X1X1’X2X3X4Y1Y1’Y2Y3Y4Rf1Rf1’Rf2Rf3Rf4XYRf(1、assay;2、Ala;3、control;4、Glu)Rf=溶质层析点中心到原点中心的距离(X)溶剂前沿到原点中心的距离(Y)Discussions(讨论)1、2、questionsAttentions(注
6、意)1.手洗净,滤纸勿污染,滤纸勿折,2.点样分配标记用铅笔(1.2.3.4),3.点样点直径<0.4cm,1、3(点3次:干后重复);2、4(点1次),点样的吸管勿串用,用毕放回原处。4.用牙签穿洞,做滤纸芯5.层析结束,铅笔先标出酚的前沿再烘干。(做记号)6.喷茚三酮时(不要对着人喷),前沿以内,喷均匀,。7.烘干后出现色班,铅笔圈下各色班。8.点样原点不是滤纸的圆心。9.层析剂是强腐蚀剂,勿触及皮肤、衣服。
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