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三羧酸循环.ppt

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三羧酸循环.ppt

上传人:suijiazhuang1 2019/2/27 文件大小:5.20 MB

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三羧酸循环.ppt

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文档介绍:三羧酸循环TheCitricAcidCycleThetricarboxylicacid(TCA)cycleTheTCACycle—ABriefSummaryTheentryofnewcarbonunitsintothecycleisthroughacetyl-(fromglycolysis),metabolicenergyiscapturedintheformofATP,NADH,andenzyme-boundFADH2(symbolizedas[FADH2]).,notonlyforthestorageformsoffuels,butalsoforthebuildingblocksofmanyothermoleculessuchasaminoacids,nucleotidebases,cholesterol,andporphyrin(ponentofheme).monpathwayfortheoxidationoffuelmolecules—aminoacids,fattyacids,,alsocalledthetricarboxylicacid(TCA)cycleortheKrebscycle(afteritsdiscoverer,HansKrebs).onditions,,thereactionsofthecitricacidcycletakeplaceinsidemitochondria,incontrastwiththoseofglycolysis,:Oxidative plex(PDC)aclusterofenzymes—multiplecopiesofeachofthreeenzymes—:pyruvatedehydrogenase(E1),dihydrolipoyltransacetylase二氢硫辛酸转乙酰基酶(E2),anddihydrolipoyldehydrogenase二氢硫辛酸脱氢酶(E3)—eachpresentinmultiplecopies.